WO2023040923A1

WO2023040923A1 - Staple yarn and fabric made therefrom

Info

Publication number: WO2023040923A1
Application number: PCT/CN2022/118881
Authority: WO
Inventors: 王健; 倪春健; 滨田润二; 陈娟; 许金碧
Original assignee: 东丽纤维研究所（中国）有限公司; 东丽株式会社
Priority date: 2021-09-16
Filing date: 2022-09-15
Publication date: 2023-03-23
Also published as: JP2024533021A; TW202319606A; CN117545883A

Abstract

Disclosed in the present invention are a staple yarn and a fabric made therefrom. The staple yarn comprises synthetic fibers having an elastic recovery rate of 50% or more after stretching and recovering 10 times, and the content of the synthetic fibers is 40 wt% or more, thereby effectively reducing the occurrence of the phenomenon that the fibers are pulled out with pilling due to friction, such that no anti-pilling additive needs to be used, the strength of the fibers is maintained, and the wear resistance is not affected. The fabric made therefrom can be widely used for manufacturing sportswear, casual clothes, etc.

Description

Spun yarn and fabrics made from it

technical field

The invention relates to a spun yarn and a fabric made from it.

Background technique

With the continuous improvement of living standards, people's requirements for fabrics are also constantly improving. Knitted fabrics using spun yarns are popular among consumers because of their soft feel and good air permeability, but they also have the problems of easy pilling and poor wear resistance. Therefore, many researches and developments have been carried out.

For example, Japanese Patent Application Laid-Open No. 4-240209 discloses acrylic fibers for fabrics with low pilling, specifically discloses that the acrylic fibers have an elongation at break of not more than 35% and a density of not more than 1.7 g/denier. Nodules are strong, although it effectively reduces the formation of hair balls and improves the anti-pilling properties, but it will affect the wear resistance.

As another example, Chinese patent document CN102505261A discloses an anti-pilling polyester staple fiber fabric, which specifically discloses that the warp yarn of the fabric is anti-pilling polyester staple fiber and natural cotton yarn, and the weft yarn is anti-pilling polyester staple fiber and wool, wherein, Anti-pilling polyester staple fiber is added anti-pilling additives during the spinning process to form a structure similar to natural fibers on the surface of the polyester fiber, which greatly changes the pilling phenomenon of the fabric. However, adding anti-pilling additives during the spinning process Anti-pilling additives are not only cumbersome in process and increased in cost, but also have the problem of affecting the wear resistance of fabrics due to the decrease in fiber strength.

Contents of the invention

The object of the present invention is to provide a spun yarn with low cost, simple process, excellent pilling resistance but unaffected abrasion resistance.

Another object of the present invention is to provide a fabric made by using the above-mentioned spun yarn.

Technical solution of the present invention:

(1) The spun yarn of the present invention contains synthetic fibers having an elastic recovery rate of 50% or more after stretching recovery 10 times, and the content of the synthetic fibers is 40 wt% or more.

(2) The knot strength of the synthetic fiber is 2.0-6.0 cN/dtex.

(3) The synthetic fibers are polyester fibers.

(4) The polyester fiber is polyethylene terephthalate fiber and/or polybutylene terephthalate fiber.

(5) The twist coefficient of the spun yarn is 2.0-6.0, and the fineness of a single short fiber constituting the spun yarn is 0.5-4.0 dtex, and the length is 35-110 mm.

(6) The spun yarn is obtained by siro compact spinning, siro spinning or compact spinning.

(7) The spun yarn is obtained by air-jet vortex spinning.

(8) A fabric made by using more than 40 wt% of the spun yarn described in (1) to (7).

(9) According to the GB/T 4802.2:2008 standard, the pilling resistance of the fabric is above grade 3, and/or according to the JIS L 1096:2010 standard E method, the abrasion resistance of the fabric is 30,000 times above.

(10) The spun yarn is exposed on at least one side of the fabric, and the exposure rate is 30% or more.

The spun yarn of the present invention effectively reduces the occurrence of the fiber being pulled out and pilling due to friction by selecting a certain content of synthetic fibers with excellent elastic recovery, and does not need to use any anti-pilling additives. The strength of the fiber can be maintained, the wear resistance is not affected, and the cost is low. The fabric made by it can be widely used in making sportswear, leisure clothes and the like.

Description of drawings

Fig. 1 is a schematic diagram of the elastic recovery of a synthetic fiber single fiber after stretching, wherein a is the length of the elongated part, and b is the length of the recovered part.

Detailed ways

After the single fiber of the synthetic fiber is stretched (especially stretched by 10%), a stretch recoverable portion and a stretch non-recoverable portion will appear during the recovery process. The higher the proportion of the stretch-recoverable portion, the better the elastic recovery of the fiber. The spun yarn of the present invention contains synthetic fibers whose elastic recovery rate is more than 50% after being stretched back 10 times. After these synthetic fibers are pulled out during the friction process, most of them can return to their original positions and are not easily entangled. ball. If the elastic recovery rate of the synthetic fiber is lower than 50% after stretching and recovering for 10 times, the fatigue phenomenon will be obvious after the synthetic fiber is stretched many times, and the fluff pulled out during the friction process cannot return to its original position well and form a Once the hair balls are removed, with subsequent repeated friction, the hair balls will gradually become larger and more numerous, resulting in poor pilling resistance of the fabric.

The spun yarn of the present invention can be made of 100wt% of the aforementioned synthetic fibers, or can be formed by blending the aforementioned synthetic fibers with other short fibers, preferably 100wt% of the aforementioned synthetic fibers. The probability of formation is greatly reduced, even if it is repeatedly rubbed, the anti-pilling property can be guaranteed. When the spun yarn of the present invention is blended with the aforementioned synthetic fibers and other staple fibers, if the content of the aforementioned synthetic fibers is lower than 40 wt%, the fluff resistance of the fabric will be reduced due to the high content of short fibers that are easily elongated and fluffed and balled. Pilling will be greatly affected. Therefore, the present invention requires that the content of the aforementioned synthetic fibers in the spun yarn be more than 40 wt%.

When the spun yarn of the present invention is blended with the aforementioned synthetic fibers and other short fibers, the blending method used is not particularly limited, and it may be a method of blending raw cotton in the cotton blending or carding process, or in drawing frame The method of overlapping and compounding the sliver in the process or the mixed gilling process may also be a method of supplying a plurality of rovings in the worsted spinning process and performing worsted twisting.

The aforementioned synthetic fibers in the spun yarn of the present invention can be short fibers with the same elastic recovery rate, or short fibers with different elastic recovery rates, as long as the elastic recovery rates are all above 50%.

Preferably, the nodule strength of the aforementioned synthetic fibers is 2-6 cN/dtex. This is considering that when the knot strength of synthetic fibers is lower than 2cN/dtex, the breaking strength of single fibers is relatively low, which may affect the strength of spun yarns, and the wear resistance of fabrics formed by them tends to decline. . When the nodule strength is higher than 6cN/dtex, although the strength of the spun yarn is improved, it is extremely difficult to drop after the ball core is formed during repeated friction, and the pilling resistance tends to decline.

The aforementioned synthetic fibers are not particularly limited, and may be polyester fibers, acrylic fibers, polyamide fibers, etc., preferably polyester fibers. The polyester fiber here can be one of polyethylene terephthalate fiber (PET), polybutylene terephthalate fiber (PBT), and polytrimethylene terephthalate fiber (PTT). or several. These fibers are obtained by stretching, crimping, heat treatment (130-170°C) and cutting as-spun fibers.

Among them, the macromolecule of PBT fiber has ester group and benzene ring structure. Compared with ordinary PET fiber, the flexible part of the basic chain link is longer, the melting point is lower, and the main chain structure is helical, which is prone to micro curling. In the macromolecules of PTT fibers, it has a "trans-side-side-trans" conformation and presents an obvious "Z" conformation, and there are three methylene units on the PTT molecular chain, so in the molecule There will be a "strange carbon effect" between the chains. This molecular structure makes the PTT fiber have the same deformation ability as a coil spring. The application that best embodies the effect of the spun yarn of the present invention is the application of knitted fabrics, but the Young's modulus of PTT fibers is relatively low, which may affect the shape retention of knitted fabrics. At the same time, the elongation of PTT fiber is high, and it is easy to entangle with the surrounding hairiness after being stretched and elongated during long-term friction or high-strength friction, and the anti-pilling effect tends to deteriorate. Therefore, the aforementioned synthetic fibers in the present invention are more preferably PBT fibers.

In addition, if the fiber is easily elongated during the spinning process, problems such as yarn quality degradation and strength degradation will also occur. Therefore, the most preferred synthetic fiber mentioned above has a Young's modulus of 30 cN/dtex or more and an elongation of 75. % less fiber.

The types of other short fibers mentioned above are not particularly limited, and can be selected according to needs, such as natural fibers, regenerated fibers, and synthetic fibers with an elastic recovery rate of less than 50%. Examples of natural fibers include cotton, hemp, wool, and silk, and examples of regenerated fibers include cupro fibers, viscose fibers, and acetate fibers.

The twist coefficient, as well as the denier and length of the individual staple fibers that make up the spun yarn are also critical to the spun yarn of the present invention. Taking the British twist coefficient as an example, when the twist coefficient of the spun yarn is lower than 2.0, the interfiber cohesion is low, there are many cases of weak twist, the strength of the spun yarn tends to decline, the rate of end breaks increases in the spinning process, and the hairiness and Neps tend to increase. When the twist coefficient of the spun yarn is higher than 6.0, the inclination angle of the single fiber is large, the utilization rate of the strength of the single fiber is low, the strength of the spun yarn tends to decline, the yarn is easy to kink to form a braided yarn, and the end stops or a defect occurs. The probability of cloth tends to increase, and the feel of fabrics made from it tends to harden. If the fineness of a single short fiber is lower than 0.5dtex, on the one hand, the difficulty of spinning will increase; on the other hand, due to the low bending stiffness of the fiber, neps are prone to appear, which may affect the quality of the cloth surface. However, if the fineness of a single short fiber is higher than 4.0dtex, under the same conditions, the number of single short fibers constituting the spun yarn decreases, and the cohesion between fibers decreases. During the friction process, the hairiness is easily pulled out to form a ball core. , the anti-pilling property tends to deteriorate; and the fiber bending stiffness is large, the decomposition of the cotton bundle may not be sufficient, and the quality of the carded web tends to decline. When the length of a single short fiber is less than 35mm, the cohesion between fibers is weakened, and the end-break rate tends to increase during spinning; and, after yarn formation, due to the short fiber, it is easy to be damaged during the friction process. Pulling out to form a core tends to lower the pilling resistance. When the length of a single short fiber is greater than 110mm, the fiber is easily damaged and torn during the process of opening, cleaning and carding, and the number of neps increases, and these neps are easily nucleated during the friction process, and the anti-pilling property is changed bad trend. Therefore, in the present invention, it is preferable that the twist coefficient of the spun yarn is 2.0 to 6.0, and the fineness of a single short fiber constituting the spun yarn is 0.5 to 4.0 dtex and the length is 35 to 110 mm.

The spinning method of the spun yarn of the present invention is not particularly limited, and examples thereof include air-jet vortex spinning, ring spinning, siro compact spinning, siro spinning or compact spinning, and the like. In consideration of both the effect of anti-pilling and the hand feeling, siro compact spinning, siro spinning or compact spinning are preferred. Among them, siro compact spinning is a new spinning technology combining compact spinning and siro spinning. Two rovings are fed into the drafting mechanism in parallel through double bell mouths at a certain distance. When leaving the front roller, they are sucked by negative pressure airflow first. After the wind gathers, it is twisted and entangled together, the structure is more compact, and the hairiness is also greatly reduced, so it is more preferable. Air-jet vortex spinning uses the high-speed vortex generated inside the nozzle to twist the fiber bundle into yarn. The yarn has a double structure, the core fibers are arranged in parallel without twist, the sheath fibers are wound outside the core fiber, and the fiber head and end are twisted. In the yarn, the structure is compact and there is very little hairiness. Considering the better anti-pilling effect, air-jet vortex spinning is preferred.

Using more than 40 wt% of the above-mentioned spun yarns as raw materials to prepare fabrics. The fabric here can be woven or knitted. When the spun yarn of the present invention is partially used, other yarns are not particularly limited and can be selected as necessary. Can enumerate such as cotton 100% pure spun yarn, viscose 100% pure spun yarn, polyester/cotton blended yarn (the polyester fiber here is PET with an elastic recovery rate lower than 50% after stretching back 10 times) fiber), etc. Wherein, the knitted fabric can be a circular knitting fabric, a flat knitting fabric, or a warp knitting fabric. The weaves of circular knitting and flat knitting can be plain stitch, rib weave, double rib weave, double reverse weave, tuck weave, float weave, lace weave, plating weave, half furrow weave, etc., without any special limitation . The warp knitted fabric can be single bar warp flat weave, single bar warp satin weave, double bar warp velvet weave, double bar warp velvet-warp flat weave, back pile weave, jacquard weave, etc., without special limitation. Among these, circular knitted fabrics are more preferable from the viewpoint of the pilling-resistant effect. In addition, both single-layer and multi-layer can be used, and the aforementioned multi-layer can be a double-layer or more-layer tissue.

Preferably, the fabric of the present invention has a pilling resistance of level 3 or above according to the GB/T 4802.2:2008 standard, and/or has an abrasion resistance of more than 30,000 times according to the JIS L 1096:2010 E method standard.

Preferably, the spun yarn of the present invention is exposed on at least one side of the fabric, and the exposure rate is 30% or more. If the exposed rate of the spun yarn of the present invention is lower than 30%, the content of the yarn that is easy to form a ball is high, the probability of frictional pilling increases, and the pilling resistance of the fabric tends to decrease.

In addition, on the premise of not damaging the fabric, in the finishing process, conventional dyeing processing, water absorption processing, water repellent processing, etc. can be carried out, and UV inhibitors, antibacterial agents, deodorants, insect repellents, and light storage agents can also be used. , Light reflective agent, anion generating agent, etc. to impart various processing functions.

The present invention will be further described below in conjunction with examples and comparative examples, but the present invention is not limited thereto. Each physical parameter involved in the present invention is tested according to the following method.

(1) Elastic recovery rate and mixing ratio of synthetic fibers

A. Sampling

Select ① or ② for sampling as needed:

①Directly select 5 spun yarns with a length of 5 cm, untwist them, pick out spun fibers over 30 mm as samples to be tested, and record the number of spun yarns as X;

② According to the JIS L 1030-1:2012 standard, judge the type of yarns that make up the fabric, disassemble the spun yarns containing synthetic fibers, take 5 spun yarns with a length of 5 cm and untwist them, and pick out the spun yarns with a length of 30 mm or more. Short fiber is used as the sample to be tested, and the number of fibers is marked as X;

B. Test equipment

On the RTC-1225A stretching machine (manufactured by INTEC CO., LTD) connected with an orientec printer (model AR-6600-7), the EXTENSION CYCLE TEST program is used to test the tensile recovery of the sample, and the interval is set to 20mm, and the elongation Rate 10%, stretching speed 20mm/min;

C. Test and calculation

Randomly select a short fiber from the sample to be tested in step A, clamp it between the upper and lower clamps of the stretching machine in a straightened and non-elongated state, press the test button, and stretch to the elongation Recover at 10%, and draw the first curve automatically at the same time. Immediately after 1 minute, adjust the origin of the drawing so that the drawing pointer of the device is at the starting point of the millimeter coordinate paper, repeat the above test steps of stretch recovery, and draw the second curve. A total of 10 tests were performed and 10 curves were obtained. As shown in Figure 1, on the millimeter coordinate paper, a is the length of the elongated part, b is the length of the restored part, and the horizontal length of the longest curve is recorded as a+b. Calculate the elastic recovery rate of the single fiber after 10 times of stretch recovery according to the following formula: elastic recovery rate=[b/(a+b)]×100%. Measure all the samples to be tested according to the same method, record the elastic recovery rate of all single fibers and take the average value of all data with elastic recovery rate above 50%, as the elastic recovery rate after 10 times of stretch recovery of the synthetic fiber of the present invention . The number of fibers whose elastic recovery rate is above 50% is counted and recorded as f1, and the mixing ratio of the synthetic fibers is calculated according to the following formula: mixing ratio=(f1/X)×100%.

(2) Mixing ratio of spun yarn

Mark a complete tissue loop in the fabric, and cut a piece of sample cloth along the edge of the tissue loop (if a complete tissue loop is less than 5cm x 5cm, cut a piece of 5cm x 5cm sample fabric) , disassemble all the yarns and weigh them as m. According to the JIS L 1030-1:2012 standard, the type of yarn constituting the fabric is judged, and the spun yarn containing synthetic fibers is distinguished. According to the test method of the elastic recovery rate of the aforementioned synthetic fibers, it is judged whether the spun yarn contains synthetic fibers with an elastic recovery rate of 50% or more. The spun yarn containing synthetic fibers with an elastic recovery rate of more than 50% is weighed and recorded as m1, and the mixing ratio of the spun yarn in the fabric is calculated according to the following formula, mixing ratio=(m1/m)×100%.

(3) Nodule strength

Tested according to JIS L 1015:2010 standard.

(4) Anti-pilling

Tested according to GB/T 4802.2:2008 standard.

(5) Abrasion resistance

Tested according to JIS L 1096:2010 standard (E method).

Among them, the number of times of measurement is set to 20,000 for the first time, and the wear of the fabric is observed after 20,000 times. If the fabric is damaged, stop the test and determine the abrasion resistance as 10,000 times; if the fabric is not damaged (woven fabric: more than two yarns are broken, knitted fabric: holes appear), continue the test. When continuing the test, set the number of test times to 10,000, and observe the wear of the fabric after 10,000 times. If the fabric is damaged, stop the test and determine the abrasion resistance as 20,000 times; if the fabric is not damaged by more than two yarns, continue the test. When continuing the test, set the number of test times to 10,000 times. After 10,000 times, observe the wear of the fabric. If the fabric is damaged, stop the test and determine the wear resistance as 30,000 times. Gradually confirm the wear of the fabric at a frequency of every 10,000 times, and stop until the fabric is damaged. When the cumulative number of tests reaches 100,000 times, observe the wear of the fabric after 100,000 times. If the fabric is damaged, it is judged that the wear resistance is 90,000 times; if the fabric is not damaged, it is judged that the wear resistance is more than 100,000 times .

(6) Exposure rate of spun yarn on one side

Identify two full weave loops on one side of the fabric. First, according to the JIS L 1030-1:2012 standard, determine the types of all the yarns in one of the cycles, distinguish the spun yarns containing synthetic fibers, and judge the staple fibers according to the test method of the elastic recovery rate of synthetic fibers mentioned above. Whether the yarn contains synthetic fibers with an elastic recovery rate of more than 50%, determines the specific position of the spun yarn in the cycle. Then use a digital microscope (manufactured by Keyence Corporation) to take another complete tissue cycle and print it out on A4 paper (if the minimum magnification of the digital microscope cannot capture the complete tissue cycle, use a digital camera to take pictures), and then cut it out with scissors The excess part, leaving only one complete tissue cycle, was weighed and recorded as G. According to the specific position of the aforementioned spun yarn in the circulation confirmed above, the corresponding part on the printing paper is cut out and weighed and recorded as g1, and the exposure rate of the spun yarn is calculated according to the following formula, the exposure rate=(g1/ G) x 100%.

(7) Rigidity and softness

Tested according to JIS L 1096:2010 standard (A method). The smaller the numerical value, the better the softness.

Example 1

PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.67dtex, a length of 38mm, and a knot strength of 3.1cN/dtex was selected as the raw material, and it went through the processes of opening and cleaning, carding, drawing, roving, siro compact spinning, and winding in sequence. , among which, drawing process: 2 times drawing, draft ratio 8 times, basis weight 16g/5m, roving process: draft ratio 9 times, twist coefficient 0.6, basis weight 3.5g/10m, Siro compact spinning process: number of revolutions 12500rpm, drafting ratio 49 times, twist coefficient 3.7, suction port average negative pressure 2300Pa, obtain the PBT content of the present invention is 40 British count spun yarns of 100wt%.

On the circular knitting machine, use the above-mentioned spun yarns to knit under the conditions of plain stitch, 45 wales/inch x 62 wales/inch to obtain gray cloth, and then scouring (90°C×20 minutes) → Dyeing (disperse dye DK9Z3, manufactured by Zhejiang Longsheng Dyestuff Chemical Co., Ltd., 120°C×30 minutes) → Finishing (moisture-wicking finishing agent HS-TC-18, manufactured by Zhuhai Huada Haohong Chemical Co., Ltd.; dosage 10owf% , processing in the bath (80°C × 20 minutes)→drying (150°C×1 minute)→setting (170°C×1 minute) to obtain the knitted fabric of the present invention, and the performance parameters are shown in Table 1.

Example 2

Select the PTT raw cotton (made by Shanghai Defulun Chemical Fiber Co., Ltd.) of fineness 1.67dtex, length 38mm, knot strength 3.2cN/dtex as raw material, all the other are the same as embodiment 1, obtain the PTT content of the present invention and be 40 British branch of 100wt% The performance parameters of spun yarn and knitted fabric are shown in Table 1.

Example 3

Select the PBT raw cotton (manufactured by Toray Corporation) of fineness 1.70dtex, length 38mm, knot strength 5.5cN/dtex as raw material, all the other are the same as embodiment 1, obtain the PBT content of the present invention and be 40 British count spun yarns of 100wt% And knitted fabrics, the performance parameters are shown in Table 1.

Example 4

Select the PBT raw cotton (manufactured by Toray Co., Ltd.) of fineness 1.70dtex, length 38mm, knot strength 6.5cN/dtex as raw material, all the other are the same as embodiment 1, obtain the PBT content of the present invention and be 40 British count spun yarns of 100wt% And knitted fabrics, the performance parameters are shown in Table 1.

Example 5

Select the PBT raw cotton (manufactured by Toray Corporation) of fineness 1.65dtex, length 38mm, knot strength 2.0cN/dtex as raw material, all the other are the same as embodiment 1, obtain the PBT content of the present invention and be 40 British count spun yarns of 100wt% And knitted fabrics, the performance parameters are shown in Table 1.

Example 6

Select the PBT raw cotton (manufactured by Toray Co., Ltd.) of fineness 1.65dtex, length 38mm, knot strength 1.5cN/dtex as raw material, all the other are the same as embodiment 1, obtain the PBT content of the present invention and be 40 British count spun yarns of 100wt% And knitted fabrics, the performance parameters are shown in Table 1.

Example 7

Select the PBT raw cotton (manufactured by Toray Co., Ltd.) of fineness 0.50dtex, length 35mm, knot strength 3.1cN/dtex as raw material, siro compact spinning twist coefficient 4.2, all the other are the same as embodiment 1, obtain the PBT content of the present invention to be 100wt % 40 British count spun yarn and knitted fabrics, the performance parameters are shown in Table 1.

Example 8

Select the PBT raw cotton (manufactured by Toray Co., Ltd.) of fineness 4.00dtex, length 110mm, knot strength 3.1cN/dtex as raw material, siro compact spinning twist coefficient 3.0, all the other are with embodiment 1, obtain the PBT content of the present invention to be 100wt % 40 British count spun yarn and knitted fabrics, the performance parameters are shown in Table 1.

Example 9

Select the PBT raw cotton (manufactured by Toray Co., Ltd.) of fineness 1.67dtex, length 38mm, knot strength 3.1cN/dtex as raw material, siro compact spinning twist coefficient 6.0, all the other are with embodiment 1, obtain the PBT content of the present invention to be 100wt % 40 British count spun yarn and knitted fabrics, the performance parameters are shown in Table 1.

Example 10

Select the PBT raw cotton (manufactured by Toray Co., Ltd.) of fineness 1.67dtex, length 38mm, knot strength 3.1cN/dtex as raw material, siro compact spinning twist coefficient 2.0, all the other are with embodiment 1, obtain the PBT content of the present invention to be 100wt % 40 British count spun yarn and knitted fabrics, the performance parameters are shown in Table 1.

Example 11

A sliver made of PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.67dtex, a length of 38mm, and a knot strength of 3.1cN/dtex was selected as sliver A, and a sliver made of Brazilian cotton/American cotton (weight ratio 50:50) As sliver B, sliver A and sliver B are drawn 3 times according to the weight ratio of 65:35, and the rest are the same as in Example 1 to obtain the 40-count spun yarn and knitted fabric with a PBT content of 65wt% of the present invention , the performance parameters are shown in Table 1.

Example 12

A sliver made of PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.56dtex, a length of 38mm, and a knot strength of 3.9cN/dtex was selected as sliver A, and a sliver made of Brazilian cotton/American cotton (weight ratio 50:50) As sliver B, sliver A and sliver B are drawn 3 times according to the weight ratio of 45:55, and the rest are the same as in Example 1 to obtain the 40-count spun yarn and knitted fabric with a PBT content of 45wt% of the present invention , the performance parameters are shown in Table 1.

Example 13

PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.67dtex, a length of 38mm, and a knot strength of 3.1cN/dtex was selected as the raw material. Wherein, the roving process: the draft ratio is 8 times, the quantitative 4g/10m, the ring spinning process: the draft ratio is 28 times, all the other are the same as in Example 1, and the PBT content of the present invention is 100wt% 40 British count spun yarn and The performance parameters of knitted fabrics are shown in Table 1.

Example 14

PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.67dtex, a length of 38mm, and a knot strength of 3.1cN/dtex was selected as the raw material, and it went through the processes of opening and cleaning, carding, drawing, roving, siro spinning, and winding in sequence. Among them, the siro spinning process: the drafting ratio is 49 times, and the rest are the same as in Example 1 to obtain the 40-count spun yarn and knitted fabric with a PBT content of 100wt% of the present invention, and the performance parameters are shown in Table 1.

Example 15

Select PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.67dtex, a length of 38mm, and a knot strength of 3.1cN/dtex as a raw material, and successively go through the processes of opening and cleaning, carding, drawing, roving, compact spinning, and winding. , roving process: drafting ratio 8 times, quantitative 4g/10m, compact spinning process: drafting ratio 28 times, all the other are with embodiment 1, obtain PBT content of the present invention and be 40 British count spun yarns and knitted fabrics of 100wt% , the performance parameters are shown in Table 1.

Example 16

Select PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.67dtex, a length of 38mm, and a knot strength of 3.1cN/dtex as a raw material, and successively go through the processes of opening and cleaning, carding, drawing, and eddy current spinning, wherein the drawing process: 3 draw frames, 8 times of drafting ratio, quantitative 11g/5m, vortex spinning process: 150 times of total drafting ratio, 300m/min of speed, all the other are the same as embodiment 1, obtain the PBT content of the present invention and be 40 inches of 100wt%. The performance parameters of spun yarn and knitted fabric are shown in Table 1.

Example 17

Select the spun yarn obtained in Example 1 and 30 English count cotton yarn for 1:1 matching and interweaving, dyeing process: first dye PBT fiber (disperse dye DK9Z3, manufactured by Zhejiang Longsheng Dyestuff Chemical Co., Ltd., 120 ° C × 30 minutes) , and then dyed cotton fiber (reactive dye RK901, manufactured by Wuxi Advanced Chemical Pharmaceutical Co., Ltd., 60° C. × 60 min), and the rest were the same as in Example 1 to obtain the knitted fabric of the present invention. The performance parameters are shown in Table 1.

Example 18

Select the spun yarn prepared in Example 1 and 30 English count cotton yarns for 1:2 interknitting, and the rest are the same as in Example 17 to obtain the knitted fabric of the present invention. The performance parameters are shown in Table 1.

Example 19

Select the PET raw cotton (manufactured by Toray Co., Ltd.) of fineness 1.56dtex, length 38mm, knot strength 4.5cN/dtex as raw material, all the other are the same as embodiment 1, obtain the PBT content of the present invention and be 40 British count spun yarns of 100wt% And knitted fabrics, the performance parameters are shown in Table 1.

Example 20

Select the PBT raw cotton (manufactured by Toray Co., Ltd.) of fineness 1.67dtex, length 38mm, knot strength 3.1cN/dtex as raw material, siro compact spinning twist coefficient 1.8, all the other are with embodiment 1, obtain the PBT content of the present invention to be 100wt % 40 British count spun yarn and knitted fabrics, the performance parameters are shown in Table 1.

Example 21

Select the PET raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.56dtex, a length of 38mm, and a knot strength of 4.5cN/dtex as raw material A and a PBT raw cotton with a fineness of 1.67dtex, a length of 38mm, and a knot strength of 3.1cN/dtex (made by Toray Co., Ltd. Co., Ltd.) As raw material B, raw material A and raw material B are sequentially passed through the processes of opening and cleaning, carding, drawing, roving, ring spinning, and winding at a weight ratio of 65:35. Wherein, the drawing process: 3 times of drawing, the rest are the same as in Example 1, and the PET content of the present invention is 65wt%, and the PBT content is 35wt%. The 40-count spun yarn and the knitted fabric, the performance parameters are shown in Table 1 .

Comparative example 1

Select the PET raw cotton (manufactured by Sinopec Yizheng Chemical Fiber Co., Ltd.) with a fineness of 1.56dtex, a length of 38mm, and a knot strength of 4.5cN/dtex as a raw material, and the rest are the same as in Example 1 to obtain a 40-count spun yarn with a PET content of 100wt%. And knitted fabrics, the performance parameters are shown in Table 1.

Comparative example 2

A sliver made of PBT raw cotton (manufactured by Toray Co., Ltd.) with a fineness of 1.56dtex, a length of 38mm, and a knot strength of 3.9cN/dtex was selected as sliver A, and a sliver made of Brazilian cotton/American cotton (weight ratio 50:50) As sliver B, sliver A and sliver B were drawn 3 times according to the weight ratio of 35:65, and the rest were the same as in Example 1 to obtain a 40-count spun yarn and a knitted fabric with a PET content of 35wt%. The performance parameters are shown in Table 1.

Table 1

According to the above table,

(1) From Example 1 and Example 2, it can be seen that under the same conditions, 80% of the elastic recovery rate and nodular strength

3.1cN/dtex PBT short fiber formed spun yarn and elastic recovery rate of 82%, knot strength

Compared with the spun yarn formed by the PTT staple fiber of 3.2cN/dtex, the anti-pilling and abrasion resistance of the fabric made by the former are better than the latter, but the stiffness value is slightly higher than the latter, that is, soft Sex is slightly less than the latter.

(2) From Example 3 and Example 4, it can be seen that under the same conditions, the spun yarn formed by the PBT staple fiber of the knot strength 5.5cN/dtex and the staple yarn formed by the PBT staple fiber of the knot strength 6.5cN/dtex Compared with fiber yarn, the pilling resistance of the fabric made by the former is better than that of the latter, but the wear resistance and softness (stiffness and softness) of the fabric made by both are equivalent.

(3) From Example 5 and Example 6, it can be seen that under the same conditions, the spun yarn formed by the PBT staple fiber of the knot strength 2.0cN/dtex and the staple yarn formed by the PBT staple fiber of the knot strength 1.5cN/dtex Compared with fiber yarn, the wear resistance of the fabric made by the former is better than that of the latter, but the pilling resistance and softness (stiffness and softness) of the fabric made by both are equivalent.

(4) From Example 1 and Example 15, it can be seen that under the same conditions, compared with the spun yarn made by the compact spinning method, the anti-fluffing of the fabric made by the former is Sphericality and wear resistance are better than the latter, but the value of rigidity and softness is slightly higher than the latter, that is, the softness is slightly lower than the latter.

(5) From Example 1 and Example 16, it can be seen that under the same conditions, compared with the spun yarn made by air-jet vortex spinning, the spun yarn made by the siro compact spinning method has a lower fluff resistance of the fabric made by the former. Although the pilling property is not as good as the latter, the hand feeling is better than the latter. In addition, the wear resistance of the fabrics made by the two is equivalent.

(6) From Example 17 and Example 18, it can be seen that under the same conditions, the knitted fabric with a PBT spun yarn exposure rate of 40% is compared with the knitted fabric with a PBT spun yarn exposure rate of 28%. Sphericality and wear resistance are better than the latter, and the value of stiffness and softness is slightly lower than the latter, that is, the softness is slightly better than the latter.

(7) From Example 10 and Example 20, it can be seen that under the same conditions, the spun yarn with a twist coefficient of 2.0 is compared with the spun yarn with a twist coefficient of 1.8. The abrasiveness is better than the latter, but the hardness and softness value is slightly higher than the latter, that is, the softness is slightly lower than the latter.

(8) From Comparative Example 1 and Example 19, it can be seen that under the same conditions, the spun yarn formed by PET staple fibers with an elastic recovery rate of 40% is compared with the spun yarn formed by PET staple fibers with an elastic recovery rate of 55%. , the pilling resistance of the fabric made by the former is only level 2, and the abrasion resistance is not as good as the latter.

(9) From Comparative Example 2 and Example 12, it can be seen that under the same conditions, the synthetic fiber (elastic recovery rate 65%) content is 35wt% spun yarn and the synthetic fiber (elastic recovery rate 65%) content is 45wt% staple yarn Compared with the spun yarn of the spun yarn, the anti-pilling property of the fabric made by the former is only level 2, and the abrasion resistance is only 20,000 times.

Claims

The spun yarn is characterized in that: the spun yarn contains synthetic fibers with an elastic recovery rate of more than 50% after stretching and recovering 10 times, and the content of the synthetic fibers is more than 40 wt%.
The spun yarn according to claim 1, characterized in that: the knot strength of the synthetic fibers is 2.0-6.0 cN/dtex.
The spun yarn according to claim 1 or 2, characterized in that: the synthetic fibers are polyester fibers.
The spun yarn according to claim 3, wherein the polyester fiber is polyethylene terephthalate fiber and/or polybutylene terephthalate fiber.
The spun yarn according to claim 1 or 2, characterized in that: the twist coefficient of the spun yarn is 2.0 to 6.0, and the fineness of a single short fiber constituting the spun yarn is 0.5 to 4.0 dtex and the length is 35 ~110mm.
The spun yarn according to claim 1 or 2, characterized in that: the spun yarn is obtained by siro compact spinning, siro spinning or compact spinning.
The spun yarn according to claim 1 or 2, characterized in that: the spun yarn is obtained by air-jet vortex spinning.
A fabric made by using the spun yarn described in any one of claims 1-7 in an amount of more than 40 wt%.
The fabric according to claim 8, characterized in that: according to the GB/T 4802.2:2008 standard, the pilling resistance of the fabric is above grade 3, and/or according to JIS L 1096:2010 standard E method, the The wear resistance of the fabric is more than 30,000 times.
The fabric according to claim 8, wherein the spun yarn is exposed on at least one side of the fabric, and the exposure rate is more than 30%.