CN107475851B - Friction unlocking rotation type radial shrinkage and expansion pipe fabric and preparation method and application thereof - Google Patents
Friction unlocking rotation type radial shrinkage and expansion pipe fabric and preparation method and application thereof Download PDFInfo
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- CN107475851B CN107475851B CN201710935155.8A CN201710935155A CN107475851B CN 107475851 B CN107475851 B CN 107475851B CN 201710935155 A CN201710935155 A CN 201710935155A CN 107475851 B CN107475851 B CN 107475851B
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D3/00—Woven fabrics characterised by their shape
- D03D3/02—Tubular fabrics
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
- D03D15/56—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads elastic
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Abstract
The invention discloses a friction unlocking rotation type radial shrinkage and expansion tube fabric, a preparation method thereof and application thereof in a slender belt-shaped sampling key part or a sample collection bag. The tubular fabric adopts a cross-thread weaving mode with symmetrical angles and friction self-locking effect to stabilize warps, so that the tubular fabric capable of radially contracting and expanding is formed. The preparation method comprises the following steps: preparing warp yarns and cross yarns and processing the warp yarns and the cross yarns; the weaving equipment adopts a circular weaving machine; the warps are densely and parallelly arranged on the circular knitting machine; the two sets of yarns of the cross-over yarn are interwoven with the warp yarns in sequence at the same but opposite helix angle to provide a friction-unlocked autorotative radial shrinkage-expansion tubular fabric. The pipe fabric prepared by the invention has the advantages of delicate and stable structure, high performance, high toughness and high modulus and convenient preparation; has high drawability and low tensile elongation; and when the sampling component and the sample collection bag are used, the sampling rate is high, the original bedding information can be well kept, and the phenomenon of sample falling does not occur.
Description
Technical Field
The invention belongs to the technical field of textile design and tubular fabric weaving, and particularly relates to a tubular fabric with high drawing smoothness and low tensile elongation when the tubular fabric is subjected to reverse drawing movement along the inner wall and the outer wall of a slender straight circular tube under the action of stretching and a forming technology thereof.
Background
At present, most of the technologies and processing techniques for forming tube fabrics are reported, certain research is also carried out on preparation methods and preparation tools, the application range of the tube fabrics also comprises numerous fields of chemistry and chemical engineering, energy transmission, aerospace, biomedical and the like, but related research is mostly focused on weaving, knitting and braiding formed tube fabrics with traditional structures, the research on tube fabrics with variable structure functions is less, and particularly, the tube fabrics with high drawing smoothness and low drawing elongation and the forming technology thereof when the tube fabrics are folded and drawn along the inner and outer walls of a slender straight circular tube under the action of drawing are not researched, and the friction unlocking autorotation type tube fabrics with radial shrinkage and expansion and the preparation methods thereof are not researched.
The tubular fabric with radial elastic shrinkage is prepared by a patent, the fabric is a woven tubular fabric, the warp yarn of the fabric selects fine denier aramid filament yarn, PBO or the mixed yarn of aramid yarn and PBO as the warp yarn, the warp yarn is twisted by 100-300 twists/m, the weft yarn selects aramid filament yarn or composite yarn of PBO filament yarn coated spandex elastic yarn, the woven tubular fabric is designed by taking a plain weave as a basic weave, the wall thickness of the tube of the woven tubular fabric is 0.2-0.3 mm, and the natural inner diameter range can be expanded from 14mm to 22.5 mm. The woven tubular fabric has the characteristics of high longitudinal strength and modulus, flame retardance and high temperature resistance, has the characteristics of no longitudinal elastic deformation, high strength, high temperature resistance, tensile force resistance and chemical corrosion resistance, does not need subsequent treatment, has stable size, lasting elasticity, smooth surface and soft hand feeling, is suitable for being used under the operating conditions of high temperature and the like, and makes up the defect of poor radial elasticity of the existing tubular fabric (Huangyudong, Ligao, Liuli, Fu-hong-Jun, Song-Yujun, Li-Jun, Wang-Caofeng, a preparation method of the tubular fabric with radial elastic shrinkage, patent application No. 201210290417.7, application No. 2012: 15/2012/102776649/14/2012/11/2012/14/11/32/11/7/15/A). The method also prepares the high-strength thin-diameter ultrathin tubular fabric, and solves the problems that the prior tubular fabric preparation method can not realize small caliber and thin tube wall of the tubular fabric and can not meet the requirements of light weight and super-strong tension resistance on the fabric under special conditions. The method selects fine denier PBO filament as warp and weft of tubular fabric, and twists the warp and the weft without twisting. The preparation method can realize the normalization, the size stabilization and the continuity of the ultrathin small-diameter tubular fabric, the product has good adaptability and high production efficiency, and has the characteristics of strong tension resistance, high temperature resistance, flame retardance and chemical corrosion resistance (Huangyudong, Liyanwei, Liuli, Fu, Songyuan army, Li Jun, Wang Caifeng, a preparation method of a high-strength thin-diameter ultrathin tubular fabric, the invention is a patent with the application number of 201210278973.2, the application date of 2012, 08 and 07, the application publication number of CN 102767028A, the application publication date of 2012, 11 and 07), while the art described in these patents relates to radial elastic shrinkage and high strength thin gauge ultra thin tubular fabrics and methods of making, however, the tubular fabric with the radial shrinkage and expansion function provided by the invention is not concerned, and particularly, the friction unlocking self-rotating type radial shrinkage and expansion tubular fabric and the preparation method thereof are not concerned.
The woven tubular composite material is widely applied to a trenchless lining-turning type pipeline repairing technology, and is used as a high-quality technology for repairing deeply buried underground damaged pipelines, and the technology can well avoid the defects of multiple construction procedures, long construction period, high cost, road surface damage, traffic blockage, resource waste and the like caused by directly excavating road surfaces. In the implementation process, one end of a lining pipe (namely, a tubular woven fabric composite material) filled with resin binder is fixed on a local excavation position on the ground in an overturning manner in advance, then the other end of the lining pipe is pushed by air pressure or water pressure to continuously overturn the lining towards the inside of the pipeline so as to be attached to the inner wall of the damaged pipeline, and finally the lining pipe is lined inside the damaged pipeline in a pipe-in-pipe manner, so that the damaged pipeline is repaired. The tubular woven composite material has no seam, good integrity and sealing performance, uniform fabric structure, uniform circumferential thickness, high strength, balanced stress during lining turnover, no over-concentration of stress, the mechanical construction is easy, the repair effect is good, and for this reason, the lining pipe is designed into a tubular woven fabric formed in one step (Guozo, Kinry, Dongbang, Dengxian, Ma Chong, Cao's right, Yuan \31478, Zhangjie, lining pipe for pipeline repair, utility model patent, application No. 200920097021.4, application No. 2009, 09.2009-month, No. CN 201531710U, No. 2010-month, 21.2010-month, Zhangqu, Rongliang, well-country, Liuyao, a composite material for pipeline turnover repair, utility model patent, application No. 201520082925.5, application No. 2015, 02-month, 05, No. CN 204472039U, No. 2015, 15.07-month, 15.8). The scope of these patent arts only relates to the use of tubular woven composite materials (inner lining tube is included in the scope of the present invention) under the action of external thrust, but none of them relates to the tube fabric with radial shrinkage and expansion function provided by the present invention, and especially does not relate to a friction-unlocking self-rotating radial shrinkage and expansion tube fabric and its preparation method provided by the present invention.
The radial compliance is the expansion and contraction performance of the artificial blood vessel and the host blood vessel, which is adapted to the test, and is generated by the change of blood pressure, and is an important index in clinical medicine, and the performance of the radial compliance depends on the geometric shape of the blood vessel and the mechanical performance of the blood vessel wall. The radial compliance of blood vessels in different body parts, the same blood vessel under different pressure conditions and different states of smooth muscle are all different. The problem of radial compliance of tubular fabrics has been reported to have been studied for applications in the medical field (j.l · eheng, p.g · acker, intravascular catheters including reinforced micro-tapes, invention patent, application No. 200880119737.8, application date: 2008 12.04, grant No. CN 101888871B, grant No. 2013: 02.13, bucin, chrysine, li jingling, royal, jowar, johao, a textile artificial blood vessel that improves radial compliance, invention patent, application No. 200910197649.6, application date: 2009: 10.23, grant No. CN 101803964B, grant No. 12.14, j.g · houston, r.g · husband, p.a · stan bri, tubular catheters, invention patent, application No. 201080130. X, application No. 2010.17, application No. CN 2011. 102711663, publication No. 2011.2011.2011.2011.22, j.23, a strap ring and a method for manufacturing the strap ring by tubular fabric which is axially cut are disclosed in the invention patent with the application number: 201210336445.8, filing date: 09/12, 2012, application publication No.: CN 102995215 a, application publication date: year 2013, month 03, day 27; s. ornithisco, R. despigrel, chinese finger cot with flat or flattened filaments, patent of invention, application No.: 201280060961.0, filing date: 24/10/2012, application publication No.: CN 103987992a, application publication date: 13 days 08 month 2014; liubiqiang, Hemin, Zhang Naojun, Liqingfeng, Chengliang and Kudzuvine average wave, a high-strength, high-elasticity and degradable artificial cardiovascular stent and a preparation method thereof, the invention patent is applied to the following patent numbers: 201310198816.5, filing date: 27/05/2013, application publication No.: CN 103272289A, authorized announcement day: 09 month 04 days 2013). The scope described in these patent technologies only relates to the research on the aspects of pressing, shearing, shrinking, expanding and the like of small-caliber tubular fabrics, but none of them relates to the tubular fabrics with radial shrinkage and expansion function provided by the present invention, and especially does not relate to a friction unlocking self-rotating type radial shrinkage and expansion tubular fabric and its preparation method provided by the present invention.
Disclosure of Invention
The invention aims to solve the problems that: a tubular fabric having high drawing smoothness and low tensile elongation when it is drawn along the inner and outer walls of a long and thin straight circular tube under tension and a forming technique thereof are provided.
The principle of the invention is that the radial expansion or contraction of the thin tubular fabric (tubular fabric) is enhanced by utilizing the rotation of the crossed line due to friction unlocking under the action of a larger stretching force without influencing the elongation of radial yarns, namely the radial expansion and contraction of the tubular fabric is unrelated to radial deformation, namely the radial expansion and contraction of the tubular fabric is achieved without radial deformation, so that the low stretching elongation of the tubular fabric during drawing can be ensured, and the high drawing smoothness can be realized.
In order to solve the problems, the invention provides a friction unlocking rotation type radial shrinkage and expansion tubular fabric which is characterized in that warps are stabilized by adopting a cross thread weaving mode with small angle symmetry and a certain friction self-locking effect, so that a tubular structure fabric capable of being shrunk and expanded radially is formed.
Preferably, the crossing angle (theta) of the crossing lines ranges from 60 degrees to 90 degrees; the relationship between the crossing angle (θ) and the helix angle (φ) of the crossing helix is: theta is 180-2 phi.
Preferably, the warp yarns are high-modulus linear elastic soft-twist filament yarns or untwisted filaments; the two yarns of the cross-over line are rigid untwisted filaments with smooth surfaces and low friction coefficients.
More preferably, neither the linear elastic filament yarns nor the untwisted filaments have an elongation at break of more than 5%.
Preferably, the elastic elongation of the warp yarn is not more than 6%, so as to ensure that the maximum elongation of the tubular fabric in the axial direction is not more than 6%; under the action of stretching, when the fabric passes through the corner at the head end of the circular tube and is bent and folded back into the inner wall to perform drawing motion, the tension of the fabric of the tube is increased sharply and is larger than the rotational friction moment of the crossed line at the crossed point, so that the crossed line generates crossed rotation with a larger crossed angle (theta' > theta) by taking the crossed point as a circle center, the crossed line hardly generates bending, but the fabric of the tube generates radial shrinkage, and the shrinkage rate is not less than 5%.
The invention also provides a preparation method of the friction unlocking rotation type radial shrinkage and expansion tube fabric, which is characterized by comprising the following specific steps of:
step 1: preparing warp yarns and cross yarns and processing the warp yarns and the cross yarns; the weaving equipment adopts a circular weaving machine;
step 2: the warps are densely and parallelly arranged on the circular knitting machine;
and step 3: the two sets of yarns of the cross-over thread are crossed with each other at the same but opposite helix angles (phi +, phi-) and are woven with the warp yarns in sequence to obtain the friction-unlocked autorotation type radial shrinkage-expansion tubular fabric.
The preparation method can be used for the existing tubular fabric preparation method, and the weaving formation of the tubular fabric with high drawing smoothness and low tensile elongation rate can not be realized when the tubular fabric enters the inner wall along the outer wall of the slender straight round tube under the drawing action and is folded and drawn.
The invention also provides application of the friction unlocking rotation type radial shrinkage and expansion pipe fabric in a slender belt-shaped sampling key part or a sample collecting bag, and the fabric can be used for stratum drilling sampling and sample collecting of small blocky solid rocks and soil samples found in space technology, geological investigation and archaeology.
Compared with the prior art, the invention has the beneficial effects that:
the pipe fabric has the advantages of delicate and stable structure, high performance, high toughness and high modulus and convenient preparation;
② has high drawability and low tensile elongation;
and when the sampling component and the sample collection bag are used, the sampling rate is high, the original bedding information can be well kept, and the phenomenon of sample falling does not occur.
Drawings
FIG. 1 is a cross-sectional view of a friction unlocking self-rotating radial shrinkage-expansion tube fabric provided by the invention;
FIG. 2a is a plan view of a friction unlocking self-rotating radial shrinkage-expansion tube fabric;
FIG. 2b is a plan view of the tube fabric after a relatively high tensile force has been applied;
FIG. 2c is a schematic diagram of the friction unlocking self-rotation radial shrinkage and expansion;
in the figure, 1-tube fabric, 11-cross; 12-warp yarns; 13-a cross-over point; 2-round tube; 21-the outer wall of the round pipe; 22-inner wall of the circular tube; 23-corner of head end of round tube; theta-crossing angle; f-friction force; theta1-crossing angle after being subjected to higher stretching; a-a tube fabric structure microcell; a. the1-tube fabric structure microcells after being subjected to higher stretching;
FIG. 3 is a graph of the withdrawal force versus time (F-t) experienced by a friction unlocked spinning radially collapsed tubular fabric.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The raw materials and equipment in examples 1-3 were funded by the national focus development program (2016YFC 0802802).
Example 1
As shown in fig. 1 and 2a-c, for the friction unlocking rotation type radial shrinkage and expansion tubular fabric provided by the invention, the tubular fabric 1 adopts a weaving mode of crossing threads 11 with small angle symmetry and certain friction self-locking effect to stabilize warp threads 12, so as to form a tubular structural fabric capable of radially shrinking and expanding.
The value of the crossing angle theta between the two crossing lines 11 when the tubular fabric 1 is woven and formed is 60 degrees; since the crossing angle θ is related to the helix angle φ of the two crossing lines 11 helix: theta is 180 DEG-2 DEG, so the helix angle phi is 60 deg.
The warp yarns 12 of the tubular fabric 1 adopt high-modulus linear elastic weak-twist Kevlar filaments; the cross-wires 11 are rigid untwisted Nomex filaments with smooth surfaces and low coefficients of friction.
The tube fabric 1 is characterized in that:
firstly, the elastic elongation of the warp yarns 12 is not more than 6 percent, so that the maximum elongation of the tubular fabric 1 in the axial direction is not more than 6 percent;
secondly, when the outer wall 21 of the slender straight round tube enters the inner wall 22 under the stretching action and is folded and drawn back, the crossed line 11 on the outer wall 21 of the round tube 2 generates a crossed angle theta at the crossed point 131Becomes smaller (theta)1< theta) and the tubular fabric 1 expands radially, the expansion rate does not exceed 5%;
thirdly, when the fabric passes through the end of the circular tube 2 and is bent and folded back into the inner wall 22 to perform drawing motion, the tension of the tube fabric 1 is increased sharply and is larger than the rotational friction torque of the crossed line 11 at the crossed point 13, so that the crossed line 11 generates a crossed angle theta by taking the crossed point 13 as a circle center2Become large (theta)2> theta) and the cross thread 11 itself is hardly bent, but the tube fabric 1 is radially contracted with a contraction rate of not less than 5%.
The preparation method of the friction unlocking rotation type radial shrinkage and expansion tube fabric comprises the following specific steps:
step 1: preparing the warp yarns 12, preparing the crossed yarns 11 and processing; the weaving equipment is a circular weaving machine;
step 2: the warp yarns 12 are arranged in parallel on a circular knitting machine used with a warp density of 180 threads/10 cm;
and step 3: the two sets of yarns of the cross-over thread 11 cross each other at the same but opposite helix angles (60 °, -60 °), sequentially weaving with the warp yarns 12, resulting in a friction-unlocked self-rotating radial teleflex fabric.
Example 2
As shown in fig. 1 and 2a-c, for the friction unlocking rotation type radial shrinkage and expansion tubular fabric provided by the invention, the tubular fabric 1 adopts a weaving mode of crossing threads 11 with small angle symmetry and certain friction self-locking effect to stabilize warp threads 12, so as to form a tubular structural fabric capable of radially shrinking and expanding.
The value of the crossing angle theta between the two crossing lines 11 when the tubular fabric 1 is woven and formed is 70 degrees; since the crossing angle θ is related to the helix angle φ of the two crossing lines 11 helix: theta is 180 DEG-2 DEG, so the helix angle phi is 55 deg.
The warp yarns 12 of the tubular fabric 1 adopt high-modulus linear elastic weak-twist Kevlar filaments; the cross-wires 11 are rigid untwisted PBO filaments with smooth surface and low coefficient of friction.
The tube fabric 1 is characterized in that:
firstly, the elastic elongation of the warp yarns 12 is not more than 6 percent, so that the maximum elongation of the tubular fabric 1 in the axial direction is not more than 6 percent;
secondly, when the outer wall 21 of the slender straight round tube enters the inner wall 22 under the stretching action and is folded and drawn back, the crossed line 11 on the outer wall 21 of the round tube 2 generates a crossed angle theta at the crossed point 131Becomes smaller (theta)1< theta) and the tubular fabric 1 expands radially, the expansion rate does not exceed 5%;
thirdly, when the fabric passes through the end of the circular tube 2 and is bent and folded back into the inner wall 22 to perform drawing motion, the tension of the tube fabric 1 is increased sharply and is larger than the rotational friction torque of the crossed line 11 at the crossed point 13, so that the crossed line 11 generates a crossed angle theta by taking the crossed point 13 as a circle center2Become large (theta)2> theta) and the cross thread 11 itself is hardly bent, but the tube fabric 1 is radially contracted with a contraction rate of not less than 5%.
The preparation method of the friction unlocking rotation type radial shrinkage and expansion tube fabric comprises the following specific steps:
step 1: preparing the warp yarns 12, preparing the crossed yarns 11 and processing; the weaving equipment is a circular weaving machine;
step 2: the warp yarns 12 are arranged in parallel on a circular knitting machine used with a warp density of 200 yarns/10 cm;
and step 3: the two sets of yarns of the cross-over thread 11 cross each other at the same but opposite helix angles (55 °, -55 °), sequentially weaving with the warp yarns 12, resulting in a friction-unlocked self-rotating radial shrinkage-expansion fabric.
Example 3
As shown in fig. 1 and 2a-c, for the friction unlocking rotation type radial shrinkage and expansion tubular fabric provided by the invention, the tubular fabric 1 adopts a weaving mode of crossing threads 11 with small angle symmetry and certain friction self-locking effect to stabilize warp threads 12, so as to form a tubular structural fabric capable of radially shrinking and expanding.
The value of the crossing angle theta between the two crossing lines 11 when the tubular fabric 1 is woven and formed is 80 degrees; since the crossing angle θ is related to the helix angle φ of the two crossing lines 11 helix: theta is 180 DEG-2 DEG, so the helix angle phi is 50 deg.
The warp yarns 12 of the tubular fabric 1 adopt high-modulus linear elastic weak-twist Kevlar filaments; the cross-yarn 11 is a smooth surfaced, low coefficient of friction, rigid untwisted PI filament.
The tube fabric 1 is characterized in that:
firstly, the elastic elongation of the warp yarns 12 is not more than 6 percent, so that the maximum elongation of the tubular fabric 1 in the axial direction is not more than 6 percent;
secondly, when the outer wall 21 of the slender straight round tube enters the inner wall 22 under the stretching action and is folded and drawn back, the crossed line 11 on the outer wall 21 of the round tube 2 generates a crossed angle theta at the crossed point 131Becomes smaller (theta)1< theta) and the tubular fabric 1 expands radially, the expansion rate does not exceed 5%;
thirdly, when the fabric passes through the end of the circular tube 2 and is bent and folded back into the inner wall 22 to perform drawing motion, the tension of the tube fabric 1 is increased sharply and is larger than the rotational friction torque of the crossed line 11 at the crossed point 13, so that the crossed line 11 generates a crossed angle theta by taking the crossed point 13 as a circle center2Become large (theta)2> theta) and the cross thread 11 itself is hardly bent, but the tube fabric 1 is radially contracted with a contraction rate of not less than 5%.
The preparation method of the friction unlocking rotation type radial shrinkage and expansion tube fabric comprises the following specific steps:
step 1: preparing the warp yarns 12, preparing the crossed yarns 11 and processing; the weaving equipment is a circular weaving machine;
step 2: the warp yarns 12 are arranged in parallel on a circular knitting machine used with a warp density of 220 yarns/10 cm;
and step 3: the two sets of yarns of the cross-over thread 11 cross each other at the same but opposite helix angles (50 °, -50 °), sequentially weaving with the warp yarns 12, resulting in a friction-unlocked self-rotating radial teleflex fabric.
As shown in FIG. 3, the pulling force-time (F-t) curve of the tube fabric can be obtained by performing the pulling force test on the friction unlocking rotation type radial shrinkage-expansion tube fabric prepared in examples 1 to 3 and the conventional tube fabric on a tube fabric pulling smoothing instrument. The change conditions of the tensile force value, the fabric thickness and the radial strain of the friction unlocking rotation type radial shrinkage-expansion tube fabric and the conventional tubular fabric at the maximum drawing force position are mainly analyzed by combining the following 5 formulas, so that the reduction rate, the fall-back rate or the improvement rate of related parameters are obtained, and the specific data indexes are shown in table 1.
The reduction rate delta of the maximum withdrawal force of the tubular fabric of the invention compared to conventional tubular fabricsFmax@The calculation formula of (2) is as follows:
in the formula, Fmax0-maximum withdrawal force to which a conventional tubular fabric is subjected; fmax@-maximum withdrawal force to which the tube fabric of the invention is subjected.
The tubular fabric, including the invention, has a thickness drop-back δ at maximum withdrawal force compared to the thickness of the fabric in its natural stateTFmaxThe calculation formula of (2) is as follows:
in the formula, To-the thickness of the tubular fabric in its natural state; t isFmax-the thickness of the tubular fabric at the maximum withdrawal force.
The tube fabric of the present invention has a thickness improvement rate delta at maximum draw-off force compared to conventional tube fabricsTFmax@The calculation formula of (2) is as follows:
in the formula, TFmax0-thickness of the conventional tube fabric at maximum withdrawal force; t isFmax@-the thickness of the tube fabric of the invention at the maximum withdrawal force.
The tube fabric of the present invention has an improved rate of radial strain delta at maximum withdrawal force compared to conventional tube fabricsεjFmax@The calculation formula of (2):
in the formula, epsilonjFmax0Radial strain, ε, of conventional tube fabrics at maximum withdrawal forcejFmax@-the radial strain of the tube fabric of the invention at maximum withdrawal force.
The tube fabric of the invention has a tensile improvement delta after drawing compared to conventional tube fabricsεlFmax@The calculation formula of (2) is as follows:
in the formula, epsilon1Fmax0Tensile deformation after drawing of conventional tubular fabrics, ε1Fmax@-the stretch deformation rate of the tube fabric according to the invention after drawing.
TABLE 1
In Table 1, Fmax-maximum withdrawal force to which the tubular fabric is subjected; deltaFmax@-the reduction in maximum withdrawal force of the tube fabric produced according to the invention compared to conventional tube fabrics; to-the thickness of the tubular fabric in its natural state; t isFmax-the thickness of the tubular fabric at maximum withdrawal force; deltaTFmax-the thickness drop-back rate of the tubular fabric at maximum withdrawal force; deltaTFmax@-the rate of improvement in thickness at maximum draw-off force of the tube fabric produced by the present invention compared to conventional tube fabrics; epsiloniFmax-radial strain of the tubular fabric at maximum withdrawal force; deltaεjFmax@-the rate of improvement of radial strain at maximum withdrawal force of the tube fabric prepared according to the invention compared to conventional tube fabrics; epsilon1Fmax-the stretch deformation rate of the tubular fabric after the drawing action; deltaε1Fmax@The tube fabric produced according to the invention has an improved stretch after drawing compared with conventional tube fabrics.
As can be seen from fig. 3 and table 1, the maximum withdrawal force of the friction unlocking self-rotating radial shrinkage-expansion tubular fabric is reduced by more than 50% and the stretching is improved by more than 35% compared with the conventional tubular fabric. Therefore, the drawing resistance of the tubular fabric is obviously reduced, the smoothness of the fabric passing through a circular tube is improved, the elongation deformation of the fabric is reduced, and the size is more stable.
Claims (6)
1. A friction unlocking rotation type radial shrinkage and expansion tubular fabric is characterized in that the tubular fabric (1) adopts a mode of weaving crossed lines (11) with symmetrical angles and friction self-locking effect to stabilize warps (12), so that a tubular structural fabric capable of being shrunk and expanded radially is formed;
the tube fabric (1) is prepared by the following specific steps:
step 1: preparing warp yarns (12) and cross yarns (11) and performing combined machining; the weaving equipment adopts a circular weaving machine;
step 2: the warps (12) are densely and parallelly arranged on the circular knitting machine;
and step 3: the two sets of yarns of the cross-over thread (11) are crossed with each other at the same but opposite helix angles (phi +, phi-) and are woven in sequence with the warp yarns (12) to obtain a friction-unlocked autorotative radial collapsing tube fabric.
2. The fabric according to claim 1, wherein the crossing angle (θ) of the crossing lines (11) ranges from 60 ° to 90 °; the relationship between the crossing angle (theta) and the helix angle (phi) of the spiral forming of the crossing line (11) is: theta is 180-2 phi.
3. The fabric according to claim 1, wherein the warp yarns (12) are linear elastic filament yarns or untwisted filament yarns; the two yarns of the cross-thread (11) are rigid untwisted filaments.
4. The friction unlocked autorotative radial shrinkage-expansion tube fabric of claim 3 wherein said linear elastic filament yarns or untwisted filaments have no more than 5% elongation at break.
5. The friction unlocking rotation type radial shrinkage-expansion tubular fabric according to claim 1, characterized in that the elastic elongation of the warp yarns (12) is not more than 6%, thereby ensuring that the maximum elongation of the tubular fabric (1) in the axial direction is not more than 6%; under the stretching action, when the fabric passes through a corner (23) at the head end of the round tube (2) and is bent and folded back into the inner wall (22) to perform drawing motion, the tension of the tube fabric (1) is increased sharply and is larger than the rotating friction torque of the crossed line (11) at the crossed point (13), so that the crossed rotation of the crossed line (11) with the crossed point (13) as a circle center is increased, the tube fabric (1) generates radial shrinkage, and the shrinkage rate is not less than 5%.
6. Use of a friction unlocking, self rotating radial expansion tube fabric of any of claims 1 to 5 in an elongated strip sampling key or sample collection bag.
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| DE19719218A1 (en) * | 1997-05-11 | 1998-11-12 | Alexander Dr Ing Buesgen | Tubular woven fabric made of warps and wefts |
| CN1321207A (en) * | 1998-10-02 | 2001-11-07 | 约翰·堡格 | Belt fabric and weaving method thereof |
| CN2526336Y (en) * | 2002-02-01 | 2002-12-18 | 赵敏 | Woven 3-D rope fabrics |
| CN1386151A (en) * | 2000-07-14 | 2002-12-18 | 奥尔巴尼国际股份公司 | Four-layer seamed press fabric |
| CN101007186A (en) * | 2006-12-30 | 2007-08-01 | 武汉科技学院 | A fabric enhanced composite vascular prosthesis |
| CN206070090U (en) * | 2016-04-26 | 2017-04-05 | 无锡百和织造股份有限公司 | It is a kind of that there is the longitudinal stretching laterally narrow elastic fabric of not contraction distortion |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8388679B2 (en) * | 2007-01-19 | 2013-03-05 | Maquet Cardiovascular Llc | Single continuous piece prosthetic tubular aortic conduit and method for manufacturing the same |
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2017
- 2017-10-10 CN CN201710935155.8A patent/CN107475851B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19719218A1 (en) * | 1997-05-11 | 1998-11-12 | Alexander Dr Ing Buesgen | Tubular woven fabric made of warps and wefts |
| CN1321207A (en) * | 1998-10-02 | 2001-11-07 | 约翰·堡格 | Belt fabric and weaving method thereof |
| CN1386151A (en) * | 2000-07-14 | 2002-12-18 | 奥尔巴尼国际股份公司 | Four-layer seamed press fabric |
| CN2526336Y (en) * | 2002-02-01 | 2002-12-18 | 赵敏 | Woven 3-D rope fabrics |
| CN101007186A (en) * | 2006-12-30 | 2007-08-01 | 武汉科技学院 | A fabric enhanced composite vascular prosthesis |
| CN206070090U (en) * | 2016-04-26 | 2017-04-05 | 无锡百和织造股份有限公司 | It is a kind of that there is the longitudinal stretching laterally narrow elastic fabric of not contraction distortion |
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| CN107475851A (en) | 2017-12-15 |
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