CN102797054A - Manufacturing method of high-strength, high-modulus and low-shrinkage polyester industrial yarn - Google Patents
Manufacturing method of high-strength, high-modulus and low-shrinkage polyester industrial yarn Download PDFInfo
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Abstract
The invention discloses a manufacturing method of a high-strength, high-modulus and low-shrinkage polyester industrial yarn. The manufacturing method comprises the processes of preparation of a highly viscous melt polyester raw material, metering, spinning, cooling, oil applying, drawing, heat shaping and winding formation; the cooling comprises slow cooling, precooling, cooling in an air free zone and air blast cooling in sequence; the precooling part uses a driven hollow-out successive annular strip. Through the introduction of a precooling device, irregularity caused by tow shaking due to move-down of a curing point of a fiber is reduced, the linear density deviation is controlled within a lower range, and orientation and crystallization of an as-spun fiber are reduced, so that the high-strength, high-modulus and low-shrinkage polyester industrial yarn is obtained; and the high-strength, high-modulus and low-shrinkage polyester industrial yarn has the advantages of high breaking tenacity, high initial modulus, low linear density deviation, low breaking elongation and lower dry-heat shrinkage rate and can be used for preferably satisfying requirements on application.
Description
Technical field
The present invention relates to a kind of production method of polyester industrial yarn, especially relate to a kind of high-strength flatness type polyester industrial yarn manufacturing approach, belong to dried polyester industrial yarn and make the field.
Background technology
Terylene has been obtained huge development on industrial use since coming out, polyester industrial yarn is meant, and terylene industrial high-strength, the thick dawn is used long filament, and its fiber number is not less than 550dtex.Polyester industrial yarn is high with its initial modulus; Fracture strength is high; Excellent physical and mechanical properties such as percentage elongation is low, and resistance to impact is good are widely used in industry; Can be used as the framework material of rubber such as tire cord, cable envelope curve, conveyer belt and plastic coating fabric, also can do rope, safety belt for vehicle, conveyer belt, tarpaulin, coated fabric, geotextile etc.
High-strength and high-modulus low-shrinkage polyester industrial yarn be important industry with one of fiber, the field is widely used.Producing in the melt spinning process of high-strength and high-modulus low-shrinkage polyester industrial yarn at present; The melt thread of from spinnerets, extruding; Through cooling air cooling solidified forming; Form the preliminary aggregated structure of fiber, the quality of shaping can directly influence the spinnability of fiber and the quality of finished product, and it all has considerable influence to the degree of orientation of fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc.Usually used PET melt, it is that the melt thread is gone out behind the spinnerets by quenching, cooldown rate is high; The tension force of spinneret draft is big, and the pre-orientation degree of fiber is big, thereby the core-skin phenomenon appears in fiber; Make that single tow cooling uniformity is not good; The coefficient of variation of fiber is bigger than normal, is unfavorable for the raising of drafting multiple, is difficult to obtain high-intensity fiber.Therefore in polyester industrial yarn was produced, the selection of cooling condition and control were the significant effects factors in the polyester industrial yarn forming process.
In the technology of preparation HMLS polyester industrial yarn; The selection of cooling condition and control are most important influence factors in the polyester industrial yarn forming process, and it all has considerable influence to the degree of orientation of fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc.In order to have obtained the superperformance polyester industrial yarn, under spinnerets, add a kind of annealing device of heating usually, tow is cooled off lentamente, install the zone of silence device simultaneously additional, increase the buffer area of tow, cool off tow more equably.But along with the adding of annealing device and zone of silence, the blowing position of side-blown moves down, and the solidification point of as-spun fibre and then moves down, tow shake aggravation; Cause being easy to generate unsettled air-flow, aggravated the shake of tow, it is unstable to make that melt goes out behind the spinnerets; Spinning technique is under some influence, and near the time of staying of as-spun fibre crystal region while is longer, thereby causes as-spun fibre degree of crystallinity long; Can cause lousiness and broken end in the production, the line density irregularity raises, decrease in yield.
Existing research shows; The method that obtains high-strength and high-modulus low-shrinkage polyester industrial yarn has multiple, is to be that raw material obtains high-tenacity high modulus low shrinkage polyester industrial silk through adopting polyester slice with high viscosity like Chinese patent CN102168319A, but these researchs all do not relate to from improving the process for cooling aspect and obtain high-strength and high-modulus low-shrinkage polyester industrial yarn; And suitable process for cooling is the position stability that can guarantee the as-spun fibre solidification point; Reduce the diameter irregularity of fiber, tow is stable, and cooling evenly; Thereby the acquisition high strength and modulus, the polyester industrial yarn that dry-hot shrinkage reduces.
Summary of the invention
The objective of the invention is to overcome the deficiency that exists in the prior art, a kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn is provided.The selection of cooling condition and control are the significant effects factors in the polyester industrial yarn forming process; In the melt spinning process; The melt thread that melt is extruded from spinnerets through cooling air cooling solidified forming, forms the preliminary aggregated structure of fiber; The quality that is shaped directly influences the spinnability of fiber and the quality of finished product, and the degree of orientation of fiber, diameter irregularity, degree of crystallinity, tensile property, mechanical property etc. are all had considerable influence.The present invention provides a kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn through the selection and the control of cooling condition.
The manufacturing approach of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn of the present invention, its technological process is high sticking fusion polyester raw material, and------------oiling,---the spray silk stretches---HEAT SETTING---winding shaping in cooling in metering; The terylene chips that is adopted is to cut into slices for high gluing through what solid-phase tack producing obtained, and its inherent viscosity is 1.0 ~ 1.2dl/g.Because its molecular weight distribution is narrow more, number-average molecular weight is high more, and the resulting fibre strength in back that stretches is high more.Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively; Reduce the orientation and the crystallization of as-spun fibre to greatest extent, improve after-drawing as far as possible than being the basis of making high-strength and high-modulus low-shrinkage polyester industrial yarn.Spinning speed and cooling condition are the principal elements that influences the as-spun fibre orientation, and crystallization then mainly receives the influence of the type of cooling and technology; When melt was extruded from spinnerets, the temperature of melt was very high, a little less than thread is highly brittle, was unable to undergo the impact of any air-flow, and simultaneously, too fast cooling can cause fiber, and radially the skin-core structure and the curling big molecule of generation of cross section increase.For orientation and the crystallization of controlling as-spun fibre, in the production of industry silk, annealer (a kind of ring-type heater) is set, to guarantee even, the slowly cooling of as-spun fibre; Annealer is pre-cooler down, and pre-cooler is a kind of passive outer shroud precooling that is, precooling is the tow to the as-spun fibre that is in molten condition.Passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive, and passive outer loop device is the hollow out endless belt, and precooling is played important effect to the irregularity that reduces fiber; Pre-cooler is no wind apparatus down; No wind apparatus is a kind of ring type structure; Its effect is a calm zone that impales around forming, and the zone of silence cooling is between precooling and blowing cooling, and zone of silence moves down the quench region of tow; Increase the buffer area of tow, can make the cooling of tow more even.Adjust as-spun fibre in the temperature of spinning on the journey through the technology of cooling condition,, finally obtain high-quality fiber to reach the orientation that reduces as-spun fibre and the purpose of crystallization.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 260 ~ 300 ℃, and slow cooling district exit strand temperature is 280 ~ 285 ℃.
Described precooling is the precooling of passive outer shroud successive; The precooling of described passive outer shroud successive is meant that the air spontaneous current cools off through passive outer shroud successive device and then to strand.
Described passive outer shroud successive device is hollow out successive endless belt, and described hollow out successive endless belt circumferentially is furnished with narrow slit; In comprising the cross section of said narrow slit, the total length of said narrow slit is 60～90% of a described hollow out successive endless belt girth; The width of said narrow slit axially successively decreases along described hollow out successive endless belt from top to bottom successively, and the Breadth Maximum of said narrow slit is 5～8mm, and minimum widith is 2～4mm; The height of described hollow out successive endless belt is 60～80mm;
Described precooling is meant that the tow ambient temperature is 160 ~ 260 ℃, and pre-cooling zone exit strand temperature is 250 ~ 260 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 100 ~ 160 ℃, and zone of silence exit strand temperature is 220 ~ 230 ℃.
The wind-warm syndrome of described blowing cooling is 15～30 ℃.
The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio≤1.5%; Fracture strength＞7.7cN/dtex; Fracture strength CV value≤2.5%, modulus>=100N/dtex, extension at break are 19.0 ± 1.5%; Extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.0 ± 0.5%.
What often the industry silk was stressed is fracture strength and extension at break, and ignores modulus and inotropic control, and cooling condition is to influence modulus and inotropic principal element.
As optimized technical scheme:
The manufacturing approach of aforesaid a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn, described slow cooling highly are 250～300mm.
The manufacturing approach of aforesaid a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn, described zone of silence cooling highly is 200～300mm.
Height through control slow cooling, precooling, zone of silence guarantees the time of staying of tow, reaches temperature that reduces tow and the purpose that reduces the tow temperature difference radially, to obtain the polyester industrial yarn of low line density deviation ratio.
The manufacturing approach of aforesaid a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn, described precooling are passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Pre-cooling zone adopts the hollow out endless belt, and to select certain altitude for use mainly be in order to reduce air flow through the disturbance to tow, to play the temperature action that reduces tow simultaneously again with crossing the wind area.
The manufacturing approach of aforesaid a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn, described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The manufacturing approach of aforesaid a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn, described blowing are cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 15～30 ℃, and humidity is 60～80%, and wind speed is 0.2～0.8m/s.
High-strength flatness type polyester industrial yarn filament number 2dtex～8dtex that the manufacturing approach of aforesaid a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn, described method make.
The basic principle of the manufacturing approach of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn of the present invention is:
After the melt thread leaves spinnerets, be cooled immediately, the tensile stress that spinnerets is stretched rises rapidly, will improve the molecular preorientation degree significantly, and fiber radially produces the birefringence gradient.Therefore, obtain the superperformance polyester industrial yarn, must make the internal stress of strand when solidifying low especially, thereby the molecular preorientation degree is reduced.Through under spinnerets, adding a kind of annealing device of heating, the melt thread is gone out behind the spinnerets not by quenching, but cooling lentamente; Cooldown rate is reduced, prolong the melt district, solidification point is moved down; Thereby reduced the tension force of spinneret draft, the pre-orientation degree of fiber is reduced, can play the slow cooling effect and reduce the core-skin phenomenon; Improve single tow cooling uniformity, be beneficial to drafting multiple and improve, can obtain the fiber of high-tenacity.Annealing device guarantees that air has sufficiently high temperature in this zone, with the decrease speed of control strand temperature, improves the tensile property of fiber.
Tow gets into cooled region through the slow cooling district, the tow at the blast points place of the top is still a kind of inhomogeneous state of cooling cold outside and hot inside.So increase zone of silence; Can further reduce the transversal temperature difference of tow; The birefringence that has reduced the strand surface that causes because of quenching and strand inner core is poor, alleviates therefore and the core-skin layer fibre structure of formation moves down the quench region of tow; Increase the buffer area of tow, can make the cooling of tow more even.
Along with the adding of annealing device and zone of silence, the blowing position of side-blown moves down, and the solidification point of fiber and then moves down.But because the fiber number of industry silk is bigger; Its specific area is less, and as-spun fibre is difficult for heat radiation, and cooldown rate is slack-off; Fiber is at the overstand of 180～200 ℃ of crystal regions; Thereby cause as-spun fibre degree of crystallinity excessive, form the concentration of local of tensile stress, can cause lousiness and broken end in the production.Simultaneously, because the solidification point of fiber and then moves down, tow shake aggravation causes this section to be easy to generate unsettled air-flow, has aggravated the shake of tow, and it is extremely unstable to make that melt goes out behind the spinnerets, is easy to generate the head silk, and spinning technique is under some influence.
Between annealing device and zone of silence, introduce pre-cooler; It at first is the position that has guaranteed the solidification point of as-spun fibre; The solidification point that has reduced fiber moves down the tow that is produced and shakes the irregularity that brings; Next is to control effectively and reduced fiber near the time of staying 180～200 ℃, thereby has avoided the excessive institute of as-spun fibre degree of crystallinity to cause stretching irregular, and what guarantee to stretch carries out smoothly.
Beneficial effect:
1, pre-cooling zone adopts the hollow out endless belt that has certain altitude and cross the wind area, reduces air flow through the disturbance to tow, reduces the temperature of tow, has guaranteed carrying out smoothly of subsequent technique.
2, through the introducing of pre-cooler, the solidification point that has reduced fiber moves down the tow that is produced and shakes the irregularity that brings, and the line density deviation ratio is controlled in the lower scope.
3, the introducing through pre-cooler finally obtains high-quality fiber to reach the purpose of the degree of orientation that reduces as-spun fibre.
4, through the introducing of pre-cooler, control fiber and reached suitable degree of crystallinity, guaranteed carrying out smoothly of stretching and subsequent technique, obtained high-quality fiber.
5, utilize the high-strength and high-modulus low-shrinkage polyester industrial yarn of the inventive method manufacturing to have the fracture strength height, modulus is big, extension at break is low, the line density deviation ratio is low, the dry-hot shrinkage advantage of reasonable, can satisfy the needs of using well.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the high sticking section of PET of 1.0dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 260 ℃, and strand temperature is 280 ℃; Described slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 160 ℃, and strand temperature is 250 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 100 ℃, and strand temperature is 220 ℃; Described zone of silence cooling highly is 200mm.
The wind-warm syndrome of described blowing cooling is 15 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 15 ℃, and humidity is 60%, and wind speed is 0.2m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 20 ℃, and speed is 2100m/min; The temperature of second roller is 72 ℃, and speed is 2260m/min, and the temperature of the 3rd roller is 210 ℃; Speed is 3250m/min; The 4th roll temperature is 150 ℃, and speed is 3150m/min, and the speed of the 5th roller is 2800 ~ 3000m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2900m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 2dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1.5%, and fracture strength is 7.8cN/dtex, and extension at break is 17.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 6.7%.
Embodiment 2
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 300 ℃, and strand temperature is 285 ℃; Described slow cooling highly is 300mm.
Described precooling is meant that the tow ambient temperature is 260 ℃, and strand temperature is 260 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 160 ℃, and strand temperature is 230 ℃; Described zone of silence cooling highly is 300mm.
The wind-warm syndrome of described blowing cooling is 30 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 22 ℃, and speed is 1900m/min; The temperature of second roller is 70 ℃, and speed is 2280m/min, and the temperature of the 3rd roller is 215 ℃; Speed is 3400m/min; The 4th roll temperature is 148 ℃, and speed is 3150m/min, and the speed of the 5th roller is 2875m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2875m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 10dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1%, and fracture strength is 8.5cN/dtex, and extension at break is 19%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.1%.
Embodiment 3
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 280 ℃, and strand temperature is 283 ℃; Described slow cooling highly is 270mm.
Described precooling is meant that the tow ambient temperature is 220 ℃, and strand temperature is 255 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 130 ℃, and strand temperature is 225 ℃; Described zone of silence cooling highly is 250mm.
The wind-warm syndrome of described blowing cooling is 20 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 20 ℃, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 23 ℃, and speed is 2100m/min; The temperature of second roller is 72 ℃, and speed is 2260m/min, and the temperature of the 3rd roller is 210 ℃; Speed is 3400m/min; The 4th roll temperature is 152 ℃, and speed is 3112m/min, and the speed of the 5th roller is 2970m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2970m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 6dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1.3%, and fracture strength is 8.1cN/dtex, and extension at break is 19%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 6.9%.
Embodiment 4
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 270 ℃, and strand temperature is 282 ℃; Slow cooling highly is 250mm.
Described precooling is meant that the tow ambient temperature is 180 ℃, and strand temperature is 253 ℃; Described precooling highly is 60mm.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer loop device is the hollow out endless belt, and it crosses wind area ratio is 20%, highly is 60mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 120 ℃, and strand temperature is 222 ℃; Described zone of silence cooling highly is 230mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 18 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 18 ℃, and humidity is 65%, and wind speed is 0.3m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 19 ℃, and speed is 3500m/min; The temperature of second roller is 85 ℃, and speed is 4850m/min, and the temperature of the 3rd roller is 210 ℃; Speed is 6500m/min; The 4th roll temperature is 148 ℃, and speed is 5900m/min, and the speed of the 5th roller is 6400m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6400m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 8dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1.2%, and fracture strength is 7.9cN/dtex, and extension at break is 18.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 6.8%.
Embodiment 5
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.0dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 300 ℃, and strand temperature is 285 ℃; Slow cooling highly is 300mm.
Described precooling is meant that the tow ambient temperature is 250 ℃, and strand temperature is 260 ℃; Described precooling highly is 80mm.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer loop device is the hollow out endless belt, and it crosses wind area ratio is 50%, highly is 80mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 160 ℃, and strand temperature is 230 ℃; Described zone of silence cooling highly is 300mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 20 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 20 ℃, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 26 ℃, and speed is 3300m/min; The temperature of second roller is 86 ℃, and speed is 5200m/min, and the temperature of the 3rd roller is 215 ℃; Speed is 6700m/min; The 4th roll temperature is 147 ℃, and speed is 6500m/min, and the speed of the 5th roller is 6400m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6400m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 9dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1.3%, and fracture strength is 8.5cN/dtex, and extension at break is 20.5%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.2%.
Embodiment 6
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.2dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 280 ℃, and strand temperature is 283 ℃; Slow cooling highly is 270mm.
Described precooling is meant that the tow ambient temperature is 220 ℃, and strand temperature is 255 ℃; Described precooling highly is 70mm.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer loop device is the hollow out endless belt, and it crosses wind area ratio is 35%, highly is 70mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 130 ℃, and strand temperature is 225 ℃; Described zone of silence cooling highly is 250mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 30 ℃; Described blowing is cooled to the lateral blowing cooling, and its technology is that the temperature of lateral blowing is 30 ℃, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 20 ℃, and speed is 3550m/min; The temperature of second roller is 83 ℃, and speed is 5300m/min, and the temperature of the 3rd roller is 218 ℃; Speed is 6800m/min; The 4th roll temperature is 152 ℃, and speed is 6100m/min, and the speed of the 5th roller is 5900m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 5900m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 5dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1.5%, and fracture strength is 8.2cN/dtex, and extension at break is 19.3%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7%.
Embodiment 7
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.0dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 260 ℃, and strand temperature is 280 ℃; Described slow cooling highly is 280mm.
Described precooling is meant that the tow ambient temperature is 160 ℃, and strand temperature is 250 ℃.
Described zone of silence cooling is meant that the tow ambient temperature is 100 ℃, and strand temperature is 220 ℃; Described zone of silence cooling highly is 250mm.
The wind-warm syndrome of described blowing cooling is 20 ℃; Described blowing is cooled to ring blowing cooling, and its technology is 20 ℃ for the temperature of ring blowing, and humidity is 70%, and wind speed is 0.5m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 24 ℃, and speed is 2100m/min; The temperature of second roller is 75 ℃, and speed is 2265m/min, and the temperature of the 3rd roller is 218 ℃; Speed is 3300m/min; The 4th roll temperature is 151 ℃, and speed is 3125m/min, and the speed of the 5th roller is 2875m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 2875m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 3dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1.4%, and fracture strength is 7.9cN/dtex, and extension at break is 19.2%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.5%.
Embodiment 8
A kind of manufacturing approach of high-strength and high-modulus low-shrinkage polyester industrial yarn, its technological process is high sticking fusion polyester raw material---metering---the spray silk---cooling---oil------HEAT SETTING---winding shaping that stretches, wherein:
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the sticking section of height of 1.1dl/g.
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively.
Described slow cooling is meant that the tow ambient temperature is 270 ℃, and strand temperature is 282 ℃; Slow cooling highly is 300mm.
Described precooling is meant that the tow ambient temperature is 180 ℃, and strand temperature is 253 ℃; Described precooling highly is 60mm.Described precooling is passive outer shroud precooling; Described passive outer shroud precooling is meant air spontaneous current loop device and then strand cooled off outside passive.Described passive outer loop device is the hollow out endless belt, and it crosses wind area ratio is 30%, highly is 60mm; The described wind area of crossing is than the ratio of the area that is meant the air flow warp with the area of the windward side of passive outer loop device.
Described zone of silence cooling is meant that the tow ambient temperature is 120 ℃, and strand temperature is 222 ℃; Described zone of silence cooling highly is 300mm.Described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
The wind-warm syndrome of described blowing cooling is 30 ℃; Described blowing is cooled to ring blowing cooling, and its technology is 30 ℃ for the temperature of ring blowing, and humidity is 80%, and wind speed is 0.8m/s.
Described four rollers that are stretched as stretch, and the temperature of first roller is 26 ℃, and speed is 3550m/min; The temperature of second roller is 85 ℃, and speed is 4900m/min, and the temperature of the 3rd roller is 209 ℃; Speed is 6750m/min; The 4th roll temperature is 153 ℃, and speed is 6100m/min, and the speed of the 5th roller is 6200m/min.Described heat setting temperature is the temperature of the 4th roller, and described winding speed is 6200m/min.
The high-strength and high-modulus low-shrinkage polyester industrial yarn filament number 4dtex that described method makes.The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: the line density deviation ratio is 1.3%, and fracture strength is 8.2cN/dtex, and extension at break is 19%, and the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.2%.
Claims (6)
1. the manufacturing approach of a high-strength and high-modulus low-shrinkage polyester industrial yarn is characterized in that: described manufacturing approach, and its technological process is high sticking fusion polyester raw material, and------------oiling,---the spray silk stretches---HEAT SETTING---winding shaping in cooling in metering;
The sticking fusion polyester raw material of described height is meant that inherent viscosity is the high sticking section of PET of 1.0 ~ 1.2dl/g;
Described cooling comprises slow cooling, precooling, zone of silence cooling and blowing cooling four parts successively;
Described slow cooling is meant that the tow ambient temperature is 260 ~ 300 ℃, and slow cooling district exit strand temperature is 280 ~ 285 ℃;
Described precooling is the precooling of passive outer shroud successive; The precooling of described passive outer shroud successive is meant that the air spontaneous current cools off through passive outer shroud successive device and then to strand; Described passive outer shroud successive device is hollow out successive endless belt, and described hollow out successive endless belt circumferentially is furnished with narrow slit; In comprising the cross section of said narrow slit, the total length of said narrow slit is 60～90% of a described hollow out successive endless belt girth; The width of said narrow slit axially successively decreases along described hollow out successive endless belt from top to bottom successively, and the Breadth Maximum of said narrow slit is 5～8mm, and minimum widith is 2～4mm; The height of described hollow out successive endless belt is 60～80mm;
Described precooling is meant that the tow ambient temperature is 160 ~ 260 ℃, and pre-cooling zone exit strand temperature is 250 ~ 260 ℃;
Described zone of silence cooling is meant that the tow ambient temperature is 100 ~ 160 ℃, and zone of silence exit strand temperature is 220 ~ 230 ℃;
The wind-warm syndrome of described blowing cooling is 15～30 ℃;
The physical index of resulting high-strength and high-modulus low-shrinkage polyester industrial yarn: line density deviation ratio≤1.5%; Fracture strength＞7.7cN/dtex; Fracture strength CV value≤2.5%, modulus>=100N/dtex, extension at break are 19.0 ± 1.5%; Extension at break CV value≤7.0%, the dry-hot shrinkage under 177 ℃, the test condition of 0.05cN/dtex is 7.0 ± 0.5%.
2. the manufacturing approach of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn according to claim 1 is characterized in that, described slow cooling highly is 250～300mm.
3. the manufacturing approach of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn according to claim 1 is characterized in that, described zone of silence cooling highly is 200～300mm.
4. the manufacturing approach of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn according to claim 1 is characterized in that, described zone of silence cooling is between precooling and blowing cooling, and zone of silence is meant a calm zone that impales all around.
5. the manufacturing approach of a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn according to claim 1; It is characterized in that described blowing is cooled to the lateral blowing cooling, its technology is that the temperature of lateral blowing is 15～30 ℃; Humidity is 60～80%, and wind speed is 0.2～0.8m/s.
6. a kind of high-strength and high-modulus low-shrinkage polyester industrial yarn according to claim 1 manufacturing approach, it is characterized in that the filament number 2dtex～8dtex of the high-strength and high-modulus low-shrinkage polyester industrial yarn that described method makes.
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