CN108035009B

CN108035009B - Hot and wet comfortable polyester fiber FDY (fully drawn yarn) for winter and preparation method thereof

Info

Publication number: CN108035009B
Application number: CN201711340313.1A
Authority: CN
Inventors: 王丽丽; 晏金龙; 熊克; 何亮
Original assignee: Jiangsu Hengli Chemical Fiber Co Ltd
Current assignee: Jiangsu Hengli Chemical Fiber Co Ltd
Priority date: 2017-12-14
Filing date: 2017-12-14
Publication date: 2021-03-19
Anticipated expiration: 2037-12-14
Also published as: CN108035009A

Abstract

The invention relates to a hot and wet comfortable polyester fiber FDY yarn for winter and a preparation method thereof, wherein the preparation method comprises the following steps: metering the spinning melt, extruding by a composite spinneret plate, cooling, oiling, stretching, heat setting and winding to prepare the hot and wet comfortable polyester fiber FDY (fully drawn yarn) for winter, wherein the material is polyester dispersed with a matte agent, and the thermal resistance of the prepared woven fabric is more than or equal to 0.18m²DEG c/W, and the wet resistance of the woven fabric is less than or equal to 14 Pa.m²and/W, the composite spinneret plate is simultaneously provided with a cross-shaped spinneret orifice and a double-cross-shaped spinneret orifice, the length ratio of the cross-shaped spinneret orifice to the double-cross-shaped spinneret orifice is equal to the product of the equivalent diameter ratio and the coefficient K, the value range of the coefficient K is 0.97-1.03, the oiling oil agent contains crown ether, and the content of the crown ether is 67.30-85.58 wt%. The preparation method is simple, and the obtained polyester fiber FDY has excellent heat-humidity comfort performance and considerable application prospect.

Description

Hot and wet comfortable polyester fiber FDY (fully drawn yarn) for winter and preparation method thereof

Technical Field

The invention belongs to the field of fiber preparation, and relates to a winter heat-moisture comfortable polyester fiber FDY and a preparation method thereof.

Background

Along with the improvement of living standard of people, the requirements of people on fabrics are higher and higher, the clothes are required to be comfortable to wear when pursuing novel style and beautiful and elegant appearance of the clothes, the comfort is that the fabrics are in contact with people in the wearing environment, the physiological and psychological needs of people are met, the fabric comfort is the heat-humidity comfort which is the most important one, and the heat-humidity comfort is that the fabrics maintain the constant body temperature of a human body between heat and humidity transfer of people and environment, so that good conditions are provided for normal physiological functions of the human body, and the human body can keep a comfortable feeling. The heat and moisture comfort of the clothes is an important aspect of the comfort of the clothes, and refers to the heat and moisture energy exchange between the human body and the environment continuously in different climatic environments after the human body wears the clothes, and when the energy exchange reaches balance, the human body feels comfortable and satisfied clothes performance that the human body feels neither cold nor hot, nor stuffy nor wet. The clothes play an important role in regulating heat and moisture energy exchange, and the heat and moisture comfort performance of the clothes has wide application in various industries through the mutual complex effect of factors such as physics, physiology, psychology and the like along with the regulation of the clothes, so that a human body feels comfortable and satisfied in heat and moisture balance. Winter clothing mainly aims at cold protection, particularly outer layer clothing requires small heat conductivity coefficient, namely large heat resistance, large static air containing amount and small ventilation capacity, and for winter underwear, better moisture absorption and air permeability are required for maintaining good microclimate between skin and underwear for water vapor evaporation on the skin. However, the hot wet comfort properties of winter wovens prepared from prior art fibers are still not satisfactory.

The cross section shape of the fiber influences the performance of the yarn and the fabric, profile fibers with different cross section shapes can be spun by utilizing different cross section shapes and sizes of the spinneret plate, the material and the shape characteristics of the fiber influence the performance of the fiber, the arrangement of the fiber and the fiber in the yarn influences the performance of the yarn, the arrangement of the yarn and the yarn in the fabric influences the performance of the fabric, and therefore the shape characteristics of the fiber are the essence influencing the performance of the yarn and the fabric. The profiled fiber is a chemical fiber with special section shape and function, which is spun by a spinneret orifice with a certain geometric shape. The profiled fibers developed at present are various in kind, and can be roughly classified into triangular, polygonal, flat, hollow, rhombic, etc. according to their cross-sectional shapes. The special-shaped fiber improves the hand feeling, the gloss and the mechanical property of the synthetic fiber to a certain extent, increases the contact area between the surface of the fiber and air and a human body, improves the moisture absorption and moisture release rate of the fiber, simultaneously improves the surface energy of the surface of the fiber, accelerates the evaporation rate of moisture in the moisture release process of the fabric, and takes away a large amount of heat, so that the special-shaped fiber is widely applied to cold and warm feeling fabrics to improve the moisture absorption and quick drying of the fabric. However, the cross section of the profiled fiber is single in shape, the function of the profiled fiber is relatively single, and the problem of poor heat and humidity comfort of the winter woven fabric cannot be solved only by the profiled fiber cross section, and if the cross section of the profiled fiber can be diversified, the problem of poor heat and humidity comfort of the winter woven fabric can be hopefully solved.

In recent years, the same-plate double-profiled fiber or the same-plate multi-double-profiled fiber is an important means for solving the problem of the deficiency of the existing profiled fiber, can integrate the advantages of two or more profiled fibers, and meets the requirements of people on high quality and function diversification of profiled fiber textiles. Although there are documents and patents on the same-board double profiled fiber or the same-board multiple double profiled fiber, the difficulty of the fiber in actual production is serious. Because the polyester melt is a non-Newtonian fluid and is a viscoelastic fluid, when the polyester melt flows in a viscous manner in the spinneret orifice, elastic deformation occurs to form a certain pressure, therefore, a certain pressure drop can be generated after the polyester melt flows out of the spinneret orifice, the shape, size, length and the relationship among the spinneret orifices can greatly influence the pressure drop of the spinneret orifice, the existing research generally only considers that the shapes of the spinneret orifices are the same or the cross-sectional areas are the same, but the influence among the shape, size and length does not relate to the influence among the spinneret orifices, so that the pressure drop is inconsistent when the polyester melt flows out of the spinneret orifices in different shapes of the same spinneret plate, the extrusion speed of fibers with different sections is different, and the smooth proceeding of fiber spinning processing is influenced.

Therefore, how to overcome the defect that the spinning of the same-plate double-profiled fiber or the same-plate multi-double-profiled fiber is difficult in the prior art, a fiber containing various cross-sectional shapes is prepared to obtain ideal heat and humidity comfort performance, and the use requirement of the winter woven fabric is met.

Disclosure of Invention

The invention aims to overcome the problem of poor heat-humidity comfort performance of woven fabrics prepared from fibers in the prior art, and provides a winter heat-humidity comfortable polyester fiber FDY with good heat-humidity comfort performance and a preparation method thereof. According to the invention, crown ether is used in the oil agent, so that the heat resistance and lubricity of the oil agent are improved, and the quality and spinnability of the fiber are improved; the composite spinneret plate is provided with two spinneret orifices with special shapes, the lengths, the cross section areas and the cross section circumferences of the two spinneret orifices are in certain relation, smooth and stable spinning of profiled fibers on the same plate is ensured, a bundle of fibers extruded from the same spinneret plate simultaneously contain cross-shaped monofilaments and double cross-shaped monofilaments, the double cross-shaped monofilaments are provided with tubular grooves along the fiber axis direction, namely the sections of the fibers are provided with the grooves to provide a pipeline for water migration, the fabric can generate a wicking effect, the wicking is a large-scale moisture absorption phenomenon between the fibers on the basis of wetting the fabric, so that the fabric has wet comfort, the porosity of the fibers is reduced by mutually combining the double cross-shaped monofilaments and the cross-shaped monofilaments, on one hand, the wicking effect of the fibers is further increased, so that the fabric has good wet comfort, and on the other hand, the cohesion between the two monofilaments is good, the fabric has good thermal comfort, and the fiber has good thermal-wet comfort performance through the mutual matching of the two monofilaments; the mixture of amorphous titanium dioxide and amorphous silicon dioxide or the mixture of calcium carbonate and amorphous silicon dioxide is used as inorganic matte particles, and the inorganic particles are uniformly dispersed in PET to destroy the crystallization and orientation of the PET so as to enable the surface of the fiber to be in a matte state.

In order to achieve the purpose, the invention adopts the technical scheme that:

a bundle of hot and wet comfortable polyester fiber FDY for winter extruded by the same spinneret plate simultaneously contains cross-shaped monofilaments and double cross-shaped monofilaments; the material of the winter heat-moisture comfortable polyester fiber FDY is polyester, and a matte agent is dispersed in the polyester;

the matting agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, or a mixture of calcium carbonate and amorphous silicon dioxide, and the matting agent is added into the polyester in the invention because: pure PET fiber, because the surface glossiness is very high, usually translucent, its glossiness is not only determined by surface reflection light, but also related to transmitted light, meanwhile the fiber glossiness is also influenced by factors such as fiber surface state, fiber cross section shape and fiber internal structure, for example, the fiber with good macromolecule orientation degree, internal structure is more uniform, fiber reflection light intensity, glossiness is bright, therefore, can adjust and control the fiber glossiness through adding inorganic particle extinction or through adjusting fiber cross section shape and surface structure. In order to make the gloss of PET fiber approach to that of cotton fiber, a delustering agent can be added in the polymerization process, the common polyester delustering agent is anatase type titanium dioxide, in order to reduce the influence of anatase type titanium dioxide crystals on the gloss of polyester, a mixture of amorphous titanium dioxide and amorphous silicon dioxide or a mixture of calcium carbonate and amorphous silicon dioxide is adopted as inorganic matte particles, the inorganic particles are uniformly dispersed in the PET, and the crystallization and orientation of the PET are damaged, so that the surface of the fiber is in a matte state;

the thermal resistance of the woven fabric made of the winter heat-moisture comfortable polyester fiber FDY is more than or equal to 0.18m²DEG c/W, and the wet resistance of the woven fabric is less than or equal to 14 Pa.m²/W。

As a preferred technical scheme:

according to the warm and humid comfortable polyester fiber FDY yarn for winter, the fineness of the cross-shaped monofilament is 0.45-0.55 dtex, and the fineness of the double cross-shaped monofilament is 0.60-0.70 dtex.

The hot and wet comfortable polyester fiber FDY for winter has the fineness of 75-100 dtex, the breaking strength of more than or equal to 3.8cN/dtex, the elongation at break of 33.0 +/-3.0 percent, the linear density deviation rate of less than or equal to 0.5 percent, the breaking strength CV value of less than or equal to 5.0 percent, the elongation at break CV value of less than or equal to 10.0 percent, the yarn evenness CV value of less than or equal to 2.00 percent, the boiling water shrinkage of 7.5 +/-0.5 percent and the oil content of 0.90 +/-0.20 percent.

The number of the filaments of the hot and wet comfortable polyester fiber FDY for winter is less than or equal to 2 per filament cake, and the capillary parameter is more than or equal to 0.15.

The hot and wet comfortable polyester fiber FDY yarn for winter is characterized in that the content of the matte agent in polyester is 1-1.5 wt%, and the content of amorphous silicon dioxide in the matte agent is 15-30 wt%.

The invention also provides a method for preparing the hot and wet comfortable polyester fiber FDY yarn for the winter, which comprises the steps of metering a spinning melt, extruding by a composite spinneret plate, cooling, oiling, stretching, heat setting and winding to prepare the hot and wet comfortable polyester fiber FDY yarn for the winter;

the spinning melt comprises the polyester and the matte agent;

the composite spinneret plate is provided with a cross-shaped spinneret orifice and double cross-shaped spinneret orifices at the same time, the length ratio of the micropores of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice is equal to the product of the ratio of the equivalent diameters of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, and the value range of the coefficient K is 0.97-1.03;

the oiling oil agent contains crown ether, and the content of the crown ether is 67.30-85.58 wt%. The crown ether is a heterocyclic organic compound and contains a plurality of ether groups, the wetting capacity of the crown ether surfactant is higher than that of a corresponding open-chain compound, the crown ether has better solubilization, the solubility of a salt compound in the organic compound is lower, but the addition of the crown ether can improve the solubility of the salt compound in organic matters. The common polyester or polyether compound in the oil agent has larger intermolecular action due to larger molecular weight and hydrogen bond action, and shows larger kinematic viscosity, and after the crown ether is added, the crown ether can be well compatible in the oil agent system of the polyester or polyether compound, enter between molecular chains of polyester or polyether compounds to shield acting force between the molecular chains, thereby reducing the viscosity of the oil solution system, meanwhile, the antistatic agent of the chemical fiber oil solution is mainly divided into anionic surfactant, cationic surfactant and amphoteric surfactant, most of the antistatic agent contains metal ions or exists in the form of salt, which causes poor compatibility of the antistatic agent and polyester or polyether compounds in the oil agent, and the addition of crown ether, due to the salt dissolution effect, the compatibility of the antistatic agent and polyester or polyether compounds is improved, the strength of an oil film of an oil agent is further improved, and the salt dissolution effect has great significance on the stability of spinning and the product holding capacity. Indexes of the oil agent are reflected by a comprehensive factor, so that a certain restriction is provided for the addition amount of crown ether, the advantage of the heat resistance and the oil film strength of the oil agent is not reflected by the excessively low addition amount, and other indexes are limited.

As a preferred technical scheme:

according to the method, the length of each micropore of the crossed spinneret orifice or the double-crossed spinneret orifice is 0.32-0.80 mm, and the equivalent diameter of the crossed spinneret orifice or the double-crossed spinneret orifice is 0.16-0.20 mm;

all the spinneret orifices are arranged on the spinneret plate in concentric circles, the centers of the spinneret orifices or the centers of circumscribed circles are positioned on the concentric circles, the concentric circles are concentric circles with equal intervals, and the spinneret orifices on the same ring are arranged in equal intervals;

the same ring simultaneously contains crossed spinneret orifices and double crossed spinneret orifices, and the number ratio of the crossed spinneret orifices to the double crossed spinneret orifices or the number ratio of the double crossed spinneret orifices to the crossed spinneret orifices is 1-2: 1.

According to the method, the thermal weight loss of the oil agent after the oil agent is heated and treated at 200 ℃ for 2h is less than 15 wt%, the crown ether has a higher volatile point and excellent heat-resistant stability, and the heat-resistant performance of the oil agent introduced with the crown ether is also remarkably improved;

the kinematic viscosity of the oil agent is 27.5-30.1 mm at the temperature of (50 +/-0.01) ° C²The kinematic viscosity of the oil agent prepared from water into 10 wt% emulsion is 0.93-0.95 mm²The crown ether can reduce the viscosity of the oil agent mainly because the crown ether has lower viscosity and is a bead-shaped micromolecule, and after the crown ether is introduced into the oil agent system, the crown ether can be well compatible in the polyester compound or polyether compound oil agent system and simultaneously enters between molecular chains of the polyester compound or polyether compound to shield the acting force between the molecular chains, so that the viscosity of the oil agent system is reduced;

the oil film strength of the oil agent is 121-127N, the oil film strength of the oil agent in the prior art is low and is generally about 110N, the main reason is that most of antistatic agents of the chemical fiber oil agent contain metal ions or exist in the form of salt, the compatibility of the antistatic agents and polyester compounds or polyether compounds in the oil agent is poor, and the crown ether can improve the oil film strength is mainly that salt solution effect can be generated after the crown ether is added, so that the compatibility of the antistatic agents and the polyester compounds or polyether compounds is improved, and the oil film strength of the oil agent is further improved;

the surface tension of the oil agent is 23.2-26.8 cN/cm, and the specific resistance is 1.0 x 10⁸～1.8×10⁸Ω·cm；

After oiling, the static friction coefficient between the fibers is 0.250-0.263, and the dynamic friction coefficient is 0.262-0.273;

after oiling, the static friction coefficient between the fiber and the metal is 0.202-0.210, and the dynamic friction coefficient is 0.320-0.332.

The method as described above, wherein the crown ether is 2-hydroxymethyl-12-crown-4, 15-crown-5 or 2-hydroxymethyl-15-crown-5;

the oil agent also contains mineral oil, phosphate potassium salt, trimethylolpropane laurate and alkyl sodium sulfonate;

the mineral oil is one of 9# to 17# mineral oil;

the phosphate potassium salt is dodecyl phosphate potassium salt, isomeric tridecanol polyoxyethylene ether phosphate potassium salt or dodecatetradecanol phosphate potassium salt;

the sodium alkyl sulfonate is sodium dodecyl sulfonate, sodium pentadecyl sulfonate or sodium hexadecyl sulfonate;

when the oil agent is used, preparing an emulsion with the concentration of 10-20 wt% by using water;

the preparation method of the oil agent comprises the following steps: uniformly mixing crown ether, phosphate potassium salt, trimethylolpropane laurate and sodium alkyl sulfonate, adding the mixture into mineral oil, and uniformly stirring to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight:

the mixing is carried out at normal temperature, the stirring temperature is 40-55 ℃, and the stirring time is 1-3 h.

According to the method, the spinning process parameters of the winter heat and humidity comfortable polyester fiber FDY yarn are as follows:

spinning temperature: 280-290 ℃;

cooling temperature: 20-25 ℃;

network pressure: 0.20 to 0.30 MPa;

a roll speed: 2200 to 2600m/min

First roll temperature: 75-85 ℃;

two roll speed: 4000-4200 m/min;

temperature of the two rolls: 135-165 ℃;

speed of winding: 3950-4140 m/min;

the initial pressure of the spinning assembly is 120bar, and the pressure rise delta P is less than or equal to 0.6 bar/day.

The invention mechanism is as follows:

the invention firstly prepares polyester dispersed with a matte agent, then a polyester melt is metered, extruded and cooled by a composite spinneret plate which is provided with two spinneret orifices with special shapes, and the lengths, the cross section areas and the cross section girth sizes of the two spinneret orifices are in certain relation, then oiled by an oiling agent containing crown ether, finally the winter heat and humidity comfortable polyester fiber with heat and humidity comfortable performance is prepared by stretching, heat setting and winding, wherein the influence of the composite spinneret plate on the performance of the finally prepared winter heat and humidity comfortable polyester fiber FDY is as follows:

the polyester melt is a non-Newtonian fluid, is a viscoelastic fluid, and generates elastic deformation while performing viscous flow in a spinneret orifice, and the existence of the elastic deformation is one of the key factors for unstable spinning. The length, the perimeter and the cross section perimeter of the spinneret orifices, the cross section area of the spinneret orifices and the like have great influence on the storage and the relaxation degree of the elastic energy in the melt.

The calculation formula of the pressure drop of the melt when the melt passes through the spinneret orifices of the spinneret is as follows:

in the formula, Δ P is the pressure drop of the melt, S_{Inner part}Is the inner wall area of the spinneret hole, and the value is equal to the product of the length of the micro-pores of the spinneret hole and the perimeter of the cross section of the spinneret hole, S_{Cutting block}τ is the viscous fluid shear stress of the material, which is the cross-sectional area of the orifice.

For polyester melt passing through spinneret orifices A and B with different shapes on the same spinneret plate, the pressure drop of the melt in the process of passing through different spinneret orifices must be ensured to be the same or within a certain range, namely delta P, to ensure that the extrusion speeds of the melt from different spinneret orifices are consistent or have smaller difference_A＝KΔP_BAnd the coefficient K is 0.97-1.03, so that the relationship between the length of each micropore of different spinneret orifices and the perimeter and the cross-sectional area of each spinneret orifice can be deduced, namely:

in the formula, D is the length of the micropores of the spinneret orifice, S is the area of the cross section of the spinneret orifice, L is the perimeter of the cross section of the spinneret orifice, and B is the equivalent diameter of the spinneret orifice.

The composite spinneret plate is provided with two spinneret holes with special shapes, and the lengths, the cross section areas and the cross section girth sizes of the two spinneret holes are in certain relation, so that smooth and stable spinning is guaranteed, the problems of uneven fiber, uneven strength, uneven dyeing and the like caused by uneven pressure drop during extrusion molding of different melts of the same-plate profiled fiber in the spinning process are solved, the stability of a product is improved, the cross-shaped monofilament and the double-cross-shaped monofilament are simultaneously extruded from the same spinneret plate, the finally prepared fiber has the advantages of both the cross-shaped fiber and the double-cross-shaped fiber, the ideal hot-wet comfort performance is achieved, and the use requirement of the woven fabric in winter can be met.

Has the advantages that:

(1) the hot and wet comfortable winter polyester fiber FDY provided by the invention has the advantages of both the cross-shaped fiber and the double cross-shaped fiber, has good hot and wet comfort and has excellent popularization value;

(2) according to the preparation method of the winter heat-humidity comfortable polyester fiber FDY, the oiling agent containing crown ether used in the oiling process has the characteristics of low viscosity, good heat resistance, high oil film strength, good smoothness and strong antistatic property, and the spinning stability and the fiber processability are improved;

(3) according to the preparation method of the hot and wet comfortable polyester fiber FDY yarn for winter, the lengths, the cross section areas and the cross section circumferences of the micropores of two spinneret orifices on the same spinneret plate are set, and the sizes of the two spinneret orifices are connected to each other, so that the pressure drops of polyester melt in the process of passing through different spinneret orifices are basically the same, the extrusion speeds of the melt from the spinneret orifices are basically the same, and the smooth and stable spinning is ensured;

(4) the preparation method of the warm-wet comfortable polyester fiber FDY yarn for winter adopts the mixture of amorphous titanium dioxide and amorphous silicon dioxide or the mixture of calcium carbonate and amorphous silicon dioxide as inorganic matte particles, the inorganic particles are uniformly dispersed in PET, and the crystallization and orientation of the PET are damaged, so that the surface of the fiber is in a matte state.

Drawings

Fig. 1 is a schematic view of the arrangement of the spinneret orifices of the composite spinneret plate in example 1 of the present invention.

Detailed Description

The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Example 1

A warm and humid comfortable polyester fiber FDY yarn for winter is prepared by the following steps:

(1) preparing an oiling agent;

uniformly mixing 2-hydroxymethyl-12-crown-4 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium hexadecylsulfonate at normal temperature, adding into 12# mineral oil, and uniformly stirring at 40 ℃ for 2.5h to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 5 parts of No. 12 mineral oil; 2-hydroxymethyl-12-crown-495 parts; 9 parts of dodecyl phosphate potassium salt; and 2 parts of sodium hexadecyl sulfonate. The prepared oil agent has crown ether content of 85.58 wt%, excellent high temperature resistance, thermal weight loss of 9 wt% after heating treatment at 200 deg.C for 2h, low viscosity, and kinematic viscosity of 29.5mm at (50 + -0.01) ° C²(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight²(s) the oil film strength of the oil agent is high and is 121N, the surface tension of the oil agent is 24.3cN/cm, and the specific resistance is 1.0X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.260, coefficient of dynamic friction (. mu.)_d) 0.263, coefficient of static friction (. mu.m) between fiber and metal (F/M) after oiling_s) 0.202, coefficient of dynamic friction (. mu.)_d) 0.330, and the prepared oil agent is prepared into an emulsion with the concentration of 19 wt% by using water when in use;

(2) a matte agent dispersed in the polyester, wherein the matte agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, the content of the matte agent in the polyester is 1.0 wt%, and the content of the amorphous silicon dioxide in the matte agent is 22 wt%;

(3) and (3) carrying out metering, composite spinneret plate extrusion, cooling, oiling, stretching, heat setting and winding on the polyester melt to obtain the hot-wet comfortable polyester fiber FDY for winter.

Wherein the composite spinneret plate is simultaneously provided with a cross-shaped spinneret orifice and a double cross-shaped spinneret orifice, the specific arrangement mode of the spinneret orifices is shown in figure 1, wherein A represents the cross-shaped spinneret orifice, B represents the double cross-shaped spinneret orifice, the ratio of the lengths of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice is equal to the product of the ratio of the equivalent diameters of the cross-shaped spinneret orifice to the double cross-shaped spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area to the perimeter of the cross-sectional area of the spinneret orifice, the coefficient K is 1.01, the length of the micropore of the cross-shaped spinneret orifice is 0.38mm, the length of the micropore of the double cross-shaped spinneret orifice is 0.38mm, the equivalent diameter of the cross-shaped spinneret orifice is 0.20mm, all the spinneret orifices are arranged on concentric circles on the spinneret plate, the centers or the centers of circumscribed circles are positioned on the concentric circles, the concentric circles, the same ring simultaneously contains a cross spinneret orifice and a double cross spinneret orifice, and the number ratio of the cross spinneret orifice to the double cross spinneret orifice on the same ring is 1: 1. The spinning process parameters are as follows: the spinning temperature is 280 ℃; the cooling temperature is 21 ℃; the network pressure is 0.25 MPa; the speed of one roller is 2400 m/min; the first roll temperature was 78 ℃; the speed of the two rollers is 4050 m/min; the temperature of the two rollers is 145 ℃; the winding speed is 3950 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.52 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.15, the titer of the cross-shaped monofilaments is 0.44dtex, and the titer of the double cross-shaped monofilaments is 0.62 dtex. Woven fabric (areal density of 100 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winter²) Has a thermal resistance of 0.18m²DEG c/W, the wet resistance of the woven fabric is 10 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 100dtex, the breaking strength is 4.2cN/dtex, the elongation at break is 33.0 percent, the linear density deviation rate is 0.33 percent, the CV value of the breaking strength is 4.5 percent, the CV value of the elongation at break is 8.5 percent, the yarn evenness CV value is 1.5 percent, and the yield in boiling water is 100dtexThe shrinkage is 7.5%, and the oil content is 0.90%.

Example 2

(1) preparing an oiling agent; uniformly mixing 15-crown ether-5, isotridecanol polyoxyethylene ether phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, adding into 13# mineral oil, and uniformly stirring at 52 ℃ for 2 hours to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 10 parts of No. 13 mineral oil; 5 parts of trimethylolpropane laurate; 15-crown ether-570 parts; 8 parts of isomeric tridecanol polyoxyethylene ether phosphate potassium salt; 6 parts of sodium dodecyl sulfate. The prepared oil agent has crown ether content of 70.70 wt%, excellent high temperature resistance, thermal weight loss of 13.5 wt% after heating treatment at 200 ℃ for 2h, low viscosity of the oil agent, and kinematic viscosity of 28.6mm at (50 +/-0.01) ° C²(s) a kinematic viscosity of 0.95mm after preparation with water as an emulsion having a concentration of 10% by weight²The oil has high oil film strength of 126N, surface tension of 24.9cN/cm, specific resistance of 1.2X 108 Ω -cm, and static friction coefficient (μ) between fiber and fiber (F/F) after oiling_s) 0.251, coefficient of dynamic friction (. mu.)_d) 0.262, coefficient of static friction (. mu.m) between fiber and metal (F/M) after oiling_s) 0.202, coefficient of dynamic friction (. mu.)_d) 0.332, and the prepared oil agent was used to prepare an emulsion with a concentration of 11 wt% with water.

(2) A matte agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.1 wt%, and the content of the amorphous silicon dioxide in the matte agent is 28 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 0.99, the length of the micropores of the double-cross spinneret orifice is 0.66mm, the length of the micropores of the cross spinneret orifice is 0.66mm, the equivalent diameter of the double-cross spinneret orifice is 0.16mm, all the spinneret orifices are arranged on a concentric circle on the spinneret plate, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circle, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged with equal intervals, the same circle simultaneously contains the cross spinneret orifices and the double-cross spinneret orifices, and the number ratio of the cross spinneret orifices to the double-cross spinneret orifices on the same circle is 1.2: 1. The spinning process parameters are as follows: spinning temperature: 282 ℃; cooling temperature: 23 ℃; network pressure: 0.29 MPa; a roll speed: 2600 m/min; first roll temperature: 79 ℃; two roll speed: 4000 m/min; temperature of the two rolls: 150 ℃; speed of winding: 4050 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.55 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.19, the titer of the cross-shaped monofilaments is 0.48dtex, and the titer of the double cross-shaped monofilaments is 0.62 dtex. Woven fabric (with surface density of 300 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winter²) Has a thermal resistance of 0.28m²DEG c/W, and the wet resistance of the woven fabric is 11 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 75dtex, the breaking strength is 4.0cN/dtex, the elongation at break is 33.0%, the deviation rate of linear density is 0.45%, the CV value of the breaking strength is 5.0%, the CV value of the elongation at break is 9.9%, the CV value of yarn evenness is 1.9%, the shrinkage rate in boiling water is 7.0%, and the oil content is 0.70%.

Example 3

(1) preparing an oiling agent; uniformly mixing 2-hydroxymethyl-15-crown-5 with potassium dodecatetradecanol phosphate, trimethylolpropane laurate and sodium pentadecylsulfonate at normal temperature, adding into No. 11 mineral oil, and uniformly stirring at 48 ℃ for 3h to obtain an oil solution; the addition amount of each component is as follows according to the parts by weight: 8 parts of No. 11 mineral oil; 10 parts of trimethylolpropane laurate;

2-hydroxymethyl-15-crown-585 parts; 11 parts of potassium dodecatetradecanol phosphate; 5 parts of sodium pentadecylsulfonate. The prepared oil agent has crown ether content of 70.83 wt%, excellent high temperature resistance, thermal weight loss of 11 wt% after heating treatment at 200 deg.C for 2h, low viscosity, and kinematic viscosity of 30.1mm at (50 + -0.01) ° C²(s) a kinematic viscosity of 0.94mm after preparation with water as an emulsion having a concentration of 10% by weight²The oil film strength of the oil agent is higher and is 125N. The surface tension of the oil agent was 23.2cN/cm, and the specific resistance was 1.8X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.250, coefficient of dynamic friction (. mu.)_d) 0.272, coefficient of static friction (. mu.) between fiber and metal (F/M) after oiling_s) 0.209, coefficient of dynamic friction (. mu.)_d) 0.329, and the prepared oil agent was used to prepare an emulsion having a concentration of 10% by weight with water.

(2) A matte agent is a mixture of calcium carbonate and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.3 wt%, and the content of the amorphous silicon dioxide in the matte agent is 20 wt%;

Wherein, the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross section area of the spinneret orifice to the perimeter of the cross section, the value of the coefficient K is 1.02, the length of the cross spinneret orifice is 0.80mm, the length of the double cross spinneret orifice is 0.808mm, the equivalent diameter of the cross spinneret orifice is 0.20mm, all the spinneret orifices are arranged on the spinneret plate in concentric circles, the centers of all the spinneret orifices or the centers of the circumscribed circles are positioned on the concentric circles, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged with equal intervals, the same circle simultaneously contains the cross spinneret orifice and the double cross spinneret orifice, the number ratio of the cross spinneret orifice to the double cross spinneret orifice on the same circle or the double cross orifice to the cross orifice is equal 2:1. The spinning process parameters are as follows: spinning temperature: 288 ℃; cooling temperature: 20 ℃; network pressure: 0.20 MPa; a roll speed: 2300 m/min; first roll temperature: 83 ℃; two roll speed: 4130 m/min; temperature of the two rolls: 165 ℃; speed of winding: 3980 m/min; the initial pressure of the spinning assembly is 120bar, and the pressure rise delta P is less than or equal to 0.6 bar/day; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.54 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.17, the titer of the cross-shaped monofilaments is 0.50dtex, and the titer of the double cross-shaped monofilaments is 0.70 dtex. Woven fabric (surface density of 240 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winter²) Has a thermal resistance of 0.20m²DEG c/W, the wet resistance of the woven fabric is 14 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 95dtex, the breaking strength is 4.5cN/dtex, the elongation at break is 36.0%, the deviation rate of linear density is 0.48%, the CV value of the breaking strength is 4.8%, the CV value of the elongation at break is 9.5%, the CV value of yarn evenness is 1.4%, the shrinkage rate in boiling water is 7.0%, and the oil content is 0.70%.

Example 4

(1) preparing an oiling agent; uniformly mixing 2-hydroxymethyl-12-crown-4 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium hexadecylsulfonate at normal temperature, adding into 12# mineral oil, and uniformly stirring at 40 ℃ for 2.5h to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 5 parts of No. 12 mineral oil; 2-hydroxymethyl-12-crown-495 parts; 9 parts of dodecyl phosphate potassium salt; and 2 parts of sodium hexadecyl sulfonate. The content of crown ether in the prepared oil agent is 85.58 wt%The oil agent has excellent high temperature resistance, the thermal weight loss is 9 wt% after the oil agent is heated for 2 hours at 200 ℃, the viscosity of the oil agent is lower, and the kinematic viscosity is 29.5mm at the temperature of (50 +/-0.01) ° C²(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight²(s) the oil film strength of the oil agent is high and is 121N, the surface tension of the oil agent is 24.3cN/cm, and the specific resistance is 1.0X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.260, coefficient of dynamic friction (. mu.)_d) 0.263, coefficient of static friction (. mu.m) between fiber and metal (F/M) after oiling_s) 0.202, coefficient of dynamic friction (. mu.)_d) 0.330, and the prepared oil agent is prepared into an emulsion with the concentration of 19 wt% by using water.

(2) A matte agent is a mixture of calcium carbonate and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.0 wt%, and the content of the amorphous silicon dioxide in the matte agent is 15 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.03, the length of the micropores of the double-cross spinneret orifice is 0.32mm, the length of the micropores of the cross spinneret orifice is 0.32mm, the equivalent diameter of the double-cross spinneret orifice is 0.17mm, all the spinneret orifices are arranged on a concentric circle on the spinneret plate, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circle, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged with equal intervals, the same circle simultaneously contains the cross spinneret orifices and the double-cross spinneret orifices, and the number ratio of the cross spinneret orifices to the double-cross spinneret orifices on the same circle is 1.5: 1. The spinning process parameters are as follows: spinning temperature: 281 ℃; cooling temperature: 21 ℃; network pressure: 0.22 MPa; a roll speed: 2500 m/min; first roll temperature: 75 ℃; two roll speed: 4200 m/min; temperature of the two rolls: 155 ℃; speed of winding: 4000 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.58 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.22, the titer of the cross-shaped monofilaments is 0.45dtex, and the titer of the double cross-shaped monofilaments is 0.65 dtex. Woven fabric (surface density of 140 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winter²) Has a thermal resistance of 0.19m²DEG c/W, and the wet resistance of the woven fabric is 13 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 85dtex, the breaking strength is 3.8cN/dtex, the elongation at break is 30.0%, the deviation rate of linear density is 0.35%, the CV value of the breaking strength is 5.0%, the CV value of the elongation at break is 8.0%, the CV value of yarn evenness is 1.3%, the shrinkage rate in boiling water is 8.0%, and the oil content is 1.10%.

Example 5

(1) preparing an oiling agent; uniformly mixing 15-crown ether-5, isotridecanol polyoxyethylene ether phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, adding into 13# mineral oil, and uniformly stirring at 52 ℃ for 2 hours to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 10 parts of No. 13 mineral oil; 5 parts of trimethylolpropane laurate; 15-crown ether-570 parts; 8 parts of isomeric tridecanol polyoxyethylene ether phosphate potassium salt; 6 parts of sodium dodecyl sulfate. The prepared oil agent has crown ether content of 70.70 wt%, excellent high temperature resistance, thermal weight loss of 13.5 wt% after heating treatment at 200 ℃ for 2h, low viscosity of the oil agent, and kinematic viscosity of 28.6mm at (50 +/-0.01) ° C²(s) a kinematic viscosity of 0.95mm after preparation with water as an emulsion having a concentration of 10% by weight²(s) 126N, which is a high oil film strength of the oil agent, 24.9cN/cm, which is a surface tension of the oil agent, and 1.2X 10 which is a specific resistance⁸Omega cm, between fibres (F/F) after oilingCoefficient of static friction (μ)_s) 0.251, coefficient of dynamic friction (. mu.)_d) 0.262, coefficient of static friction (. mu.m) between fiber and metal (F/M) after oiling_s) 0.202, coefficient of dynamic friction (. mu.)_d) 0.332, and the prepared oil agent was used to prepare an emulsion with a concentration of 11 wt% with water.

(2) A matte agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.5 wt%, and the content of the amorphous silicon dioxide in the matte agent is 15 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 0.98, the length of the micropores of the double-cross spinneret orifice is 0.54mm, the length of the micropores of the cross spinneret orifice is 0.547mm, the equivalent diameter of the double-cross spinneret orifice is 0.16mm, all the spinneret orifices are arranged on the spinneret plate in concentric circles, the centers of the circles or the centers of the outer circles of all the spinneret orifices are positioned on the concentric circles, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged in equal intervals, the same circle simultaneously contains the cross spinneret orifices and the double-cross spinneret orifices, and the number ratio of the cross spinneret orifices to the double-cross spinneret orifices on the same circle is 1.2: 1. The spinning process parameters are as follows: spinning temperature: 290 ℃; cooling temperature: 25 ℃; network pressure: 0.26 MPa; a roll speed: 2200 m/min; first roll temperature: 75 ℃; two roll speed: 4150 m/min; temperature of the two rolls: 135 deg.C; speed of winding: 4050 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.5 bar/day.

The finally prepared FDY (fully drawn yarn) containing cross-shaped monofilaments and double cross-shaped monofilaments and a bunch of winter hot and wet comfortable polyester fibers extruded by the same spinneret plateThe number is less than or equal to 2/spinning cake, the capillary parameter is 0.19, the titer of the cross-shaped monofilament is 0.49dtex, and the titer of the double cross-shaped monofilament is 0.67 dtex. Woven fabric made of warm and humid comfortable polyester fiber FDY (areal density of 220 g/m) used in winter²) Has a thermal resistance of 0.21m²DEG c/W, and the wet resistance of the woven fabric is 11 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 100dtex, the breaking strength is 4.4cN/dtex, the elongation at break is 33.0%, the deviation rate of linear density is 0.46%, the CV value of the breaking strength is 4.8%, the CV value of the elongation at break is 9.6%, the CV value of yarn evenness is 1.8%, the shrinkage rate in boiling water is 7.5%, and the oil content is 1.10%.

Example 6

(1) preparing an oiling agent; uniformly mixing 2-hydroxymethyl-15-crown-5 with potassium dodecatetradecanol phosphate, trimethylolpropane laurate and sodium pentadecylsulfonate at normal temperature, adding into 14# mineral oil, and uniformly stirring at 55 ℃ for 1h to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 3 parts of No. 14 mineral oil; 10 parts of trimethylolpropane laurate; 2-hydroxymethyl-15-crown-575 parts; 14 parts of potassium dodecatetradecanol phosphate; and 7 parts of sodium pentadecylsulfonate. The prepared oil agent has the crown ether content of 68.80 wt%, excellent high temperature resistance, thermal weight loss of 12 wt% after heat treatment at 200 ℃ for 2h, low viscosity, and kinematic viscosity of 27.5mm at (50 +/-0.01) ° C²(s) a kinematic viscosity of 0.95mm after preparation with water as an emulsion having a concentration of 10% by weight²The oil film strength of the oil agent was 126N. The surface tension of the oil agent was 25.4cN/cm, and the specific resistance was 1.6X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.255, coefficient of dynamic friction (. mu.)_d) 0.267, coefficient of static friction (. mu.) between fiber and metal (F/M) after oiling_s) 0.203, coefficient of dynamic friction (. mu.)_d) 0.330, and the prepared oil agent is prepared into an emulsion with the concentration of 20 wt% by using water.

(2) A matte agent is a mixture of calcium carbonate and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.5 wt%, and the content of the amorphous silicon dioxide in the matte agent is 24 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.00, the length of the micropores of the cross-shaped spinneret orifices is 0.59mm, the length of the micropores of the double cross-shaped spinneret orifices is 0.59mm, the equivalent diameter of the cross-shaped spinneret orifices is 0.19mm, all the spinneret orifices are arranged on a concentric circle on the spinneret plate, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circle, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged with equal intervals, the same circle simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the cross-shaped spinneret orifices to the double cross-shaped spinneret orifices on the. The spinning process parameters are as follows: spinning temperature: 285 ℃; cooling temperature: 24 ℃; network pressure: 0.30 MPa; a roll speed: 2500 m/min; first roll temperature: 85 ℃; two roll speed: 4090 m/min; temperature of the two rolls: 140 ℃; speed of winding: 3950 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.6 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.18, the titer of the cross-shaped monofilaments is 0.50dtex, and the titer of the double cross-shaped monofilaments is 0.60 dtex. Woven fabric (surface density of 260 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winter²) Has a thermal resistance of 0.25m²DEG c/W, and the wet resistance of the woven fabric is 13 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 75dtex, the breaking strength is 4.0cN/dtex, the elongation at break is 36.0 percent, and the deviation of linear density isThe percentage was 0.5%, the breaking strength CV value was 4.2%, the elongation at break CV value was 9.1%, the yarn evenness CV value was 2.0%, the boiling water shrinkage ratio was 8.0%, and the oil content was 0.90%.

Example 7

(1) preparing an oiling agent; uniformly mixing 15-crown ether-5 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium hexadecylsulfonate at normal temperature, adding the mixture into 15# mineral oil, and uniformly stirring the mixture for 2 hours at 41 ℃ to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 8 parts of No. 15 mineral oil; 20 parts of trimethylolpropane laurate; 15-crown ether-5100 parts; 15 parts of dodecyl phosphate potassium salt; and 2 parts of sodium hexadecyl sulfonate. The prepared oil agent has the crown ether content of 68.97 wt%, excellent high temperature resistance, thermal weight loss of 8.5 wt% after 2h of heat treatment at 200 ℃, low viscosity of the oil agent, and kinematic viscosity of 28.4mm at (50 +/-0.01) ° C²(s) a kinematic viscosity of 0.94mm after preparation with water as an emulsion having a concentration of 10% by weight²The oil film strength of the oil agent was high and was 122N. The surface tension of the oil agent was 26.8cN/cm, and the specific resistance was 1.8X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.263, coefficient of dynamic friction (. mu.)_d) 0.268, coefficient of static friction (. mu.M) between fiber and metal (F/M) after oiling_s) 0.210, coefficient of dynamic friction (. mu.)_d) 0.320, and the prepared oil agent is prepared into an emulsion with the concentration of 13 wt% by using water.

(2) A matte agent is a mixture of calcium carbonate and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.1 wt%, and the content of the amorphous silicon dioxide in the matte agent is 28 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 0.97, the length of the micropores of the double-cross spinneret orifice is 0.55mm, the length of the micropores of the cross spinneret orifice is 0.55mm, the equivalent diameter of the double-cross spinneret orifice is 0.18mm, all the spinneret orifices are arranged on a concentric circle on the spinneret plate, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circle, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged with equal intervals, the same circle simultaneously contains the cross spinneret orifices and the double-cross spinneret orifices, and the number ratio of the double-cross spinneret orifices to the cross spinneret orifices on the same circle is 1: 1. The spinning process parameters are as follows: spinning temperature: 289 deg.C; cooling temperature: 20 ℃; network pressure: 0.29 MPa; a roll speed: 2600 m/min; first roll temperature: 78 ℃; two roll speed: 4140 m/min; temperature of the two rolls: 160 ℃; speed of winding: 4130 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.46 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilament and the double cross-shaped monofilament, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.16, the titer of the cross-shaped monofilament is 0.58dtex, and the titer of the double cross-shaped monofilament is 0.64 dtex. Woven fabric (surface density of 190 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) used in winter²) Has a thermal resistance of 0.18m²DEG c/W, the wet resistance of the woven fabric is 10 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 95dtex, the breaking strength is 4.6cN/dtex, the elongation at break is 30.0%, the deviation rate of linear density is 0.44%, the CV value of the breaking strength is 4.3%, the CV value of the elongation at break is 9.2%, the CV value of yarn evenness is 1.5%, the shrinkage rate in boiling water is 7.5%, and the oil content is 0.90%.

Example 8

(1) preparing an oiling agent; mixing 2-hydroxymethyl-12-crown-4 with potassium dodecatetradecanol phosphate and trimethylolpropaneThe laurate and the sodium pentadecylsulfonate are uniformly mixed at normal temperature, added into the 16# mineral oil and uniformly stirred for 3 hours at 45 ℃ to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 9 parts of No. 16 mineral oil; 2-hydroxymethyl-12-crown-480 parts; 12 parts of potassium dodecatetradecanol phosphate; 5 parts of sodium pentadecylsulfonate. The prepared oil agent has crown ether content of 83.33 wt%, excellent high temperature resistance, thermal weight loss of 14 wt% after heating treatment at 200 deg.C for 2h, low viscosity of the oil agent, and kinematic viscosity of 30.0mm at (50 + -0.01) ° C²(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight²The oil film strength of the oil agent was 127N. The surface tension of the oil agent was 23.5cN/cm, and the specific resistance was 1.5X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.262, coefficient of dynamic friction (. mu.)_d) 0.273, coefficient of static friction (. mu.M) between fiber and metal (F/M) after oiling_s) 0.208, coefficient of dynamic friction (. mu.)_d) 0.328, and the prepared oil agent is prepared into emulsion with the concentration of 18 wt% by using water.

(2) A matte agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.4 wt%, and the content of the amorphous silicon dioxide in the matte agent is 30 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.01, the length of the micropores of the double-cross spinneret orifice is 0.32mm, the length of the micropores of the cross spinneret orifice is 0.32mm, the equivalent diameter of the double-cross spinneret orifice is 0.16mm, all the spinneret orifices are arranged on a concentric circle on the spinneret plate, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circle, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged with equal intervals, the same circle simultaneously contains the cross spinneret orifices and the double-cross spinneret orifices, and the number ratio of the double-cross spinneret orifices to the cross spinneret orifices on the same circle is 1.8: 1. The spinning process parameters are as follows: spinning temperature: 280 ℃; cooling temperature: 20 ℃; network pressure: 0.25 MPa; a roll speed: 2300m/min one roll temperature: 80 ℃; two roll speed: 4000 m/min; temperature of the two rolls: 155 ℃; speed of winding: 3970 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.4 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilament and the double cross-shaped monofilament, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.21, the titer of the cross-shaped monofilament is 0.55dtex, and the titer of the double cross-shaped monofilament is 0.65 dtex. Woven fabric (areal density of 180 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winter²) Has a thermal resistance of 0.23m²DEG c/W, the wet resistance of the woven fabric is 14 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 75dtex, the breaking strength is 3.8cN/dtex, the elongation at break is 36.0%, the deviation rate of linear density is 0.5%, the CV value of the breaking strength is 5.0%, the CV value of the elongation at break is 10.0%, the CV value of yarn evenness is 1.9%, the shrinkage rate in boiling water is 7.0%, and the oil content is 0.70%.

Example 9

(1) preparing an oiling agent; uniformly mixing 2-hydroxymethyl-15-crown-5 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, and uniformly stirring at 55 ℃ for 3 hours to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 15 parts of trimethylolpropane laurate; 2-hydroxymethyl-15-crown-590 parts; 8 parts of dodecyl phosphate potassium salt; 7 parts of sodium dodecyl sulfate. The prepared oil agent has the crown ether content of 81.81 wt%, excellent high temperature resistance, thermal weight loss of 10 wt% after heating treatment at 200 ℃ for 2h, low viscosity (50) < 2 >The kinematic viscosity is 29.7mm at +/-0.01) DEG C²(s) a kinematic viscosity of 0.94mm after preparation with water as an emulsion having a concentration of 10% by weight²The oil film strength of the oil agent was 126N. The surface tension of the oil agent was 24.8cN/cm, and the specific resistance was 1.8X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.250, coefficient of dynamic friction (. mu.)_d) 0.264, coefficient of static friction (. mu.m) between fiber and metal (F/M) after oiling_s) 0.210, coefficient of dynamic friction (. mu.)_d) 0.321, and the prepared oil agent was used to prepare an emulsion with a concentration of 10 wt% with water.

(2) A matte agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.5 wt%, and the content of the amorphous silicon dioxide in the matte agent is 30 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.03, the length of the micropores of the double-cross spinneret orifice is 0.60mm, the length of the micropores of the cross spinneret orifice is 0.60mm, the equivalent diameter of the double-cross spinneret orifice is 0.20mm, all the spinneret orifices are arranged on a concentric circle on the spinneret plate, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circle, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged with equal intervals, the same circle simultaneously contains the cross spinneret orifices and the double-cross spinneret orifices, and the number ratio of the double-cross spinneret orifices to the cross spinneret orifices on the same circle is 1.6: 1. The spinning process parameters are as follows: spinning temperature: 283 ℃; cooling temperature: 23 ℃; network pressure: 0.30 MPa; a roll speed: 2500 m/min; first roll temperature: 79 ℃; two roll speed: 4130 m/min; temperature of the two rolls: 135 deg.C; speed of winding: 4010 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.38 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.27, the titer of the cross-shaped monofilaments is 0.49dtex, and the titer of the double cross-shaped monofilaments is 0.70 dtex. Woven fabric made of warm and humid comfortable polyester fiber FDY (surface density 270 g/m) used in winter²) Has a thermal resistance of 0.22m²DEG c/W, the wet resistance of the woven fabric is 10 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 85dtex, the breaking strength is 4.5cN/dtex, the elongation at break is 33.0%, the deviation rate of linear density is 0.39%, the CV value of the breaking strength is 3.5%, the CV value of the elongation at break is 9.4%, the CV value of yarn evenness is 1.4%, the shrinkage rate in boiling water is 7.0%, and the oil content is 0.90%.

Example 10

(1) preparing an oiling agent; uniformly mixing 2-hydroxymethyl-15-crown-5 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, and uniformly stirring at 55 ℃ for 3 hours to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 15 parts of trimethylolpropane laurate; 2-hydroxymethyl-15-crown-590 parts; 8 parts of dodecyl phosphate potassium salt; 7 parts of sodium dodecyl sulfate. The prepared oil agent has the crown ether content of 81.81 wt%, excellent high temperature resistance, thermal weight loss of 10 wt% after heating treatment at 200 ℃ for 2h, low viscosity of the oil agent, and kinematic viscosity of 29.7mm at (50 +/-0.01) ° C²(s) a kinematic viscosity of 0.94mm after preparation with water as an emulsion having a concentration of 10% by weight²(s) 126N, which is a high oil film strength of the oil agent, 24.8cN/cm, which is a surface tension of the oil agent, and 1.8X 10 which is a specific resistance⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.250, coefficient of dynamic friction (. mu.)_d) 0.264, coefficient of static friction (. mu.m) between fiber and metal (F/M) after oiling_s) 0.210, coefficient of dynamic friction (. mu.)_d) 0.321, and the prepared oil agent was used to prepare an emulsion with a concentration of 10 wt% with water.

(2) A matte agent is a mixture of calcium carbonate and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.3 wt%, and the content of the amorphous silicon dioxide in the matte agent is 18 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.02, the length of the micropores of the cross-shaped spinneret orifice is 0.32mm, the length of the micropores of the double cross-shaped spinneret orifice is 0.321mm, the equivalent diameter of the cross-shaped spinneret orifice is 0.19mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circles, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged in equal intervals, the same circle simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the double cross-shaped spinneret orifices to the cross-shaped spinneret orifices on the same circle is. The spinning process parameters are as follows: spinning temperature: 286 ℃; cooling temperature: 24 ℃; network pressure: 0.27 MPa; a roll speed: 2400 m/min; first roll temperature: 75 ℃; two roll speed: 4200 m/min; temperature of the two rolls: 165 ℃; speed of winding: 3980 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.55 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.17, the titer of the cross-shaped monofilaments is 0.55dtex, and the titer of the double cross-shaped monofilaments is 0.69 dtex. Woven fabric made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winterObject (areal density 230 g/m)²) Has a thermal resistance of 0.24m²DEG c/W, the wet resistance of the woven fabric is 14 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 80dtex, the breaking strength is 4.1cN/dtex, the elongation at break is 36.0%, the deviation rate of linear density is 0.37%, the CV value of the breaking strength is 3.9%, the CV value of the elongation at break is 8.9%, the CV value of yarn evenness is 1.5%, the shrinkage rate in boiling water is 7.5%, and the oil content is 1.10%.

Example 11

(1) preparing an oiling agent; uniformly mixing 2-hydroxymethyl-12-crown-4 with dodecyl phosphate potassium salt, trimethylolpropane laurate and sodium dodecyl sulfate at normal temperature, adding into No. 9 mineral oil, and uniformly stirring at 40 ℃ for 1h to obtain an oil agent; the addition amount of each component is as follows according to the parts by weight: 2 parts of No. 9 mineral oil; 10 parts of trimethylolpropane laurate; 2-hydroxymethyl-12-crown-490 parts; 8 parts of dodecyl phosphate potassium salt; and 3 parts of sodium dodecyl sulfate. The prepared oil agent has crown ether content of 79.6 wt%, excellent high temperature resistance, thermal weight loss of 14.5 wt% after heating treatment at 200 ℃ for 2h, low viscosity of the oil agent, and kinematic viscosity of 29.6mm at (50 +/-0.01) ° C²(s) a kinematic viscosity of 0.93mm after preparation with water as an emulsion having a concentration of 10% by weight²(s) the oil has high oil film strength of 125N, surface tension of 24.8cN/cm, and specific resistance of 1.3X 10⁸Omega cm, coefficient of static friction (mu) between fibres (F/F) after oiling_s) 0.255, coefficient of dynamic friction (. mu.)_d) 0.266, after oiling, the coefficient of static friction (μ) between fiber and metal (F/M)_s) 0.203, coefficient of dynamic friction (. mu.)_d) 0.320, and the prepared oil agent is prepared into an emulsion with the concentration of 15 wt% by using water.

(2) A matte agent is a mixture of calcium carbonate and amorphous silicon dioxide in the polyester, wherein the content of the matte agent in the polyester is 1.2 wt%, and the content of the amorphous silicon dioxide in the matte agent is 15 wt%;

Wherein the composite spinneret plate is simultaneously provided with a cross spinneret orifice and a double cross spinneret orifice, the length ratio of the cross spinneret orifice to the double cross spinneret orifice is equal to the product of the equivalent diameter ratio of the cross spinneret orifice to the double cross spinneret orifice and a coefficient K, the equivalent diameter is the ratio of the cross-sectional area of the spinneret orifice to the perimeter of the cross-sectional area, the value of the coefficient K is 1.03, the length of the micropores of the cross-shaped spinneret orifice is 0.80mm, the length of the micropores of the double cross-shaped spinneret orifice is 0.80mm, the equivalent diameter of the cross-shaped spinneret orifice is 0.19mm, all the spinneret orifices are arranged on a spinneret plate in concentric circles, the centers of all the spinneret orifices or the centers of external circles are positioned on the concentric circles, the concentric circles are concentric circles with equal intervals, the spinneret orifices on the same circle are arranged in equal intervals, the same circle simultaneously contains the cross-shaped spinneret orifices and the double cross-shaped spinneret orifices, and the number ratio of the double cross-shaped spinneret orifices to the cross-shaped spinneret orifices on the same. The spinning process parameters are as follows: spinning temperature: 287 deg.C; cooling temperature: 25 ℃; network pressure: 0.24 MPa; a roll speed: 2300 m/min; first roll temperature: 85 ℃; two roll speed: 4100 m/min; temperature of the two rolls: 150 ℃; speed of winding: 4140 m/min; the initial pressure of the spin pack was 120bar and the pressure rise Δ P was 0.57 bar/day.

The finally prepared same spinneret plate extrudes a bundle of hot and wet comfortable winter polyester fiber FDY containing the cross-shaped monofilaments and the double cross-shaped monofilaments, the number of the broken filaments is less than or equal to 2 per filament cake, the capillary parameter is 0.18, the titer of the cross-shaped monofilaments is 0.50dtex, and the titer of the double cross-shaped monofilaments is 0.61 dtex. Woven fabric (areal density of 280 g/m) made of warm and humid comfortable polyester fiber FDY (fully drawn yarn) for winter²) Has a thermal resistance of 0.20m²DEG c/W, and the wet resistance of the woven fabric is 13 Pa.m²and/W. The fineness of the hot and wet comfortable polyester fiber FDY yarn for winter is 100dtex, the breaking strength is 4.3cN/dtex, the elongation at break is 30.0%, the deviation rate of linear density is 0.44%, the CV value of the breaking strength is 4.8%, the CV value of the elongation at break is 8.5%, the CV value of yarn evenness is 2.0%, the shrinkage rate in boiling water is 8.0%, and the oil content is 0.90%.

Claims

1. A preparation method of a warm and humid comfortable polyester fiber FDY yarn for winter is characterized by comprising the following steps: metering the spinning melt, extruding by a composite spinneret plate, cooling, oiling, stretching, heat setting and winding to prepare the hot and wet comfortable polyester fiber FDY yarn for winter;

the spinning melt comprises polyester and a matte agent;

the matte agent is a mixture of amorphous titanium dioxide and amorphous silicon dioxide, or a mixture of calcium carbonate and amorphous silicon dioxide;

the oiling oil agent contains crown ether, and the content of the crown ether is 67.30-85.58 wt%;

the crown ether is 2-hydroxymethyl-12-crown-4, 15-crown ether-5 or 2-hydroxymethyl-15-crown-5;

the thermal weight loss of the oil agent after heating treatment for 2 hours at 200 ℃ is less than 15 wt%;

after introducing crown ether into the oil agent system, the crown ether can be well compatible in the polyester compound or polyether compound oil agent system, and simultaneously enters between molecular chains of the polyester compound or polyether compound to shield acting force between the molecular chains, so that the viscosity of the oil agent system is reduced; the kinematic viscosity of the oil agent is 27.5-30.1 mm at the temperature of (50 +/-0.01) ° C²The kinematic viscosity of the oil agent prepared from water into 10 wt% emulsion is 0.93-0.95 mm²/s；

After the crown ether is added, a salt dissolution effect can be generated, the compatibility of the antistatic agent and polyester compounds or polyethers is improved, and the strength of an oil film of the oil agent is further improved; the oil film strength of the oil agent is 121-127N;

2. The preparation method of the hot and humid comfortable polyester fiber FDY yarn for winter as claimed in claim 1, wherein the length of the micropores of the cross-shaped spinneret hole or the double cross-shaped spinneret hole is 0.32 to 0.80mm, and the equivalent diameter of the cross-shaped spinneret hole or the double cross-shaped spinneret hole is 0.16 to 0.20 mm;

3. The preparation method of the winter heat and moisture comfortable polyester fiber FDY filament according to claim 1, wherein the oil solution further comprises mineral oil, potassium phosphate, trimethylolpropane laurate and sodium alkyl sulfonate;

the mineral oil is one of 9# to 17# mineral oil;

4. The preparation method of the winter heat and moisture comfortable polyester fiber FDY filament according to any one of claims 1 to 3, wherein the spinning process parameters of the winter heat and moisture comfortable polyester fiber FDY filament are as follows:

spinning temperature: 280-290 ℃;

cooling temperature: 20-25 ℃;

network pressure: 0.20 to 0.30 MPa;

a roll speed: 2200 to 2600m/min

First roll temperature: 75-85 ℃;

two roll speed: 4000-4200 m/min;

temperature of the two rolls: 135-165 ℃;

speed of winding: 3950-4140 m/min;

5. The preparation method of the winter heat and moisture comfortable polyester fiber FDY yarn as claimed in claim 1, wherein the preparation method comprises the following steps: a bundle of hot and wet comfortable polyester fiber FDY for winter extruded by the same spinneret plate simultaneously contains cross-shaped monofilaments and double cross-shaped monofilaments; the material of the winter heat-moisture comfortable polyester fiber FDY is polyester, and a matte agent is dispersed in the polyester;

6. The preparation method of the warm and humid comfortable polyester fiber FDY yarn for winter according to claim 5, wherein the titer of the cross-shaped monofilament is 0.45 to 0.55dtex, and the titer of the double cross-shaped monofilament is 0.60 to 0.70 dtex.

7. The preparation method of the winter heat and moisture comfortable polyester fiber FDY filament according to claim 5 or 6, wherein the fineness of the winter heat and moisture comfortable polyester fiber FDY filament is 75-100 dtex, the breaking strength is more than or equal to 3.8cN/dtex, the elongation at break is 33.0 +/-3.0%, the linear density deviation rate is less than or equal to 0.5%, the breaking strength CV value is less than or equal to 5.0%, the elongation at break CV value is less than or equal to 10.0%, the yarn evenness CV value is less than or equal to 2.00%, the boiling water shrinkage is 7.5 +/-0.5%, and the oil content is 0.90 +/-0.20%.

8. The preparation method of the winter heat and moisture comfortable polyester fiber FDY yarn, according to claim 7, wherein the matte agent is contained in the polyester in an amount of 1 to 1.5 wt%, and the matte agent is contained in the amorphous silica in an amount of 15 to 30 wt%.