Process for improving delamination of strong twist double-layer fabric

Abstract

The application belongs to the technical field of textile weaving process, and particularly relates to a process for improving layering of strong-twist double-layer fabric. The process comprises a sizing process and a weaving process. According to the organizational characteristics of the double-layer fabric, the process, equipment and winding movement mode are improved during weaving and winding, the threading process sequence of warp yarns on the heald frame is adjusted, and the yarn tension difference on the single heald frame is changed, so that the effect of small tension weaving and clear shedding and reduced stopping frequency is achieved. The winding mode after weaving is changed, the number of pressure rollers is reduced, and the extrusion force of the winding device on the fabric surface during the fabric winding process is reduced as much as possible, so that the fabric layering defect rate of the double-layer fabric is reduced.

Description

Technical Field

[0001] This invention belongs to the field of textile weaving technology, specifically relating to a process for improving the delamination of high-twist double-layer fabrics. Background Technology

[0002] Double-layered fabrics are popular with consumers due to their softness, lightness, and breathability. Double-layered fabrics consist of two layers tightly connected by a single yarn. With the development of different fabric weaves, traditional weaving techniques need continuous optimization and improvement to achieve high quality.

[0003] High-twist yarns, due to their increased twist, exhibit greater surface smoothness, reduced fuzz, and a noticeably thinner and more transparent fabric. They also possess a certain strength and a stable appearance. However, this high twist can also lead to increased shrunking and twisting during weaving, thus increasing the risk of delamination and defective fabrics. Improper weft tension control during weaving can prevent the yarn from passing smoothly through the loom, causing delamination or defective fabrics. However, simply controlling yarn tension is insufficient to significantly reduce the defect rate. Furthermore, the weaving of high-twist double-layer fabrics is challenging, inevitably requiring frequent shutdowns for repairs. High shutdown frequency and low loom opening rate reduce production efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a process for improving the delamination of high-twist double-layer fabrics, reducing delamination problems during the weaving process, lowering the defect rate after start-up, and increasing the start-up rate.

[0005] The process for improving the delamination of high-twist double-layer fabrics described in this invention includes sizing and weaving processes, wherein the sizing agent formula for the sizing process is as follows:

[0006] Starch 120-130g / L;

[0007] Acrylic slurry 20-30 g / L;

[0008] Wax concentrate 0.5-1.5g / L;

[0009] The tension in the weaving process is 0.8-1.2 kN;

[0010] The weaving process involves threading the palm fibers as follows:

[0011] The order of the pattern plates in the heddle frame arrangement is as follows:

[0012] ① 1 / 3 * 6 cycles;

[0013] ②3 / 1*6 cycles;

[0014] ③ 1 / 1 + 1 / 3 * 4 cycles + 1 / 2 * 2 cycles;

[0015] ④2 / 1 + 3 / 1 * 5 cycles + 1 / ;

[0016] ⑤ 1 / 1 + 1 / 3*2 loop + 2 / 2 + 1 / 3*2 loop + / 2 (double-layer node complex frame);

[0017] ⑥2 / 3+1 / 3*4 loop + 1 / 2 (double-layer node complex frame);

[0018] ⑦ and ⑧ are edge organization frames with a length of 2 / 2*6.

[0019] The weaving process is carried out using a Tsudakoma multi-arm loom, and the improvement of this equipment is based on patent CN113417054A.

[0020] The starch is a mixture of cassava etherified starch and corn grafted starch. AS-1 high-performance modified starch from Hefei Runli Textile New Material Co., Ltd. is preferred.

[0021] This product is based on high-quality esterified modified starch, and further modified through the addition polymerization of acrylic acid monomers to increase the adhesion and abrasion resistance of the slurry film. The resulting slurry film is soft, smooth, and easy to separate, effectively reducing dry area hairiness. The slurry of this product has good solubility and can still maintain fluidity when cold, without gelling, and has good compatibility with other slurries. At the same time, it has good biodegradability, is easy to desizing, and its COD and BOD indicators are equivalent to those of starch.

[0022] The preferred acrylic sizing agent is QB-918 produced by Qingdao Jimo Qingbao Sizing Factory. Acrylic esters have low polarity, with ester groups as the main functional groups, and weak hydrophilicity. Acrylic esters have excellent adhesion properties to hydrophobic fibers. However, their hygroscopicity and re-adhesion are not as good as those of polyacrylamide and polyacrylic acid, which can make the sizing film relatively soft. When used as an auxiliary material in combination with cassava etherified starch, corn grafted starch, and wax, it can make the fiber hairs conform, effectively prevent tangling, improve the abrasion resistance of the yarn, and at the same time avoid excessive smoothness that could cause fabric slippage and delamination.

[0023] The speed of the machine in the sizing process is 40-50 m / min.

[0024] The speed of the weaving process is 640-660 rpm.

[0025] The opening time of the weaving process is 286-294°.

[0026] The tilt angle of the warp stop frame in the weaving process is 20-40°.

[0027] The fabric winding method in the weaving process involves using a pressure roller in conjunction with a friction roller for winding. For example... Figure 1 As shown, the upper pressure roller and the fabric guide roller are out of service.

[0028] The viscosity of the slurry is 7.6-8s.

[0029] The mass concentration of the sizing slurry is 10-12%.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] (1) The present invention improves the heddle threading process, adjusts the sequence of the heddle threading process on the heddle frame, changes the yarn tension difference on the single heddle frame, and achieves the effect of low tension weaving and clear opening, reducing the number of stops.

[0032] (2) The present invention changes the winding method after the fabric is woven, reduces the number of pressure rollers, and minimizes the squeezing force of the winding device on the fabric surface during the winding process, thereby reducing the delamination rate of double-layer fabric.

[0033] (3) This invention uses a mixture of cassava etherified starch and corn grafted starch to make slurry. Based on high-quality esterified modified starch, this product is further modified by addition polymerization of acrylic acid monomers to increase the adhesion and abrasion resistance of the slurry film. The resulting slurry film is soft and smooth, and it is easy to separate, effectively reducing the fuzz in the dry area. The slurry of this product has good solubility and can still maintain fluidity when cold, without gelling. It has good compatibility with other slurries. At the same time, it has good biodegradability, is easy to desizing, and its COD and BOD indicators are equivalent to those of starch.

[0034] (4) The acrylic ester slurry of the present invention has low polarity, with ester groups as the main functional groups and weak hydrophilicity. Acrylic ester has excellent adhesion properties to hydrophobic fibers. Its hygroscopicity and re-adhesion are not as good as those of polyacrylamide and polyacrylic acid, which can make the slurry film softer. When used as an auxiliary material in combination with cassava etherified starch, corn grafted starch and wax essence, it can make the fiber hairs fit well, effectively prevent tangling, improve the abrasion resistance of the yarn, and at the same time avoid excessive smoothness that causes the fabric to slip and delaminate. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the fabric winding mechanism in the fabric winding step of the present invention;

[0036] Figure 2 This is a schematic diagram of the fabric winding mechanism in the fabric winding step of Comparative Example 2;

[0037] In the picture:

[0038] 1. Friction roller; 2. Upper pressure roller; 3. Lower pressure roller; 4. Fabric winding roller; 5. Fabric winding guide roller. Detailed Implementation

[0039] The present invention will be further described below with reference to the embodiments, but the scope of protection of the present invention is not limited thereto.

[0040] Unless otherwise specified, all raw materials used in the examples were commercially available.

[0041] Starch: AS-1 high-performance modified starch was purchased from Hefei Runli Textile New Material Co., Ltd.

[0042] Acrylic slurry: QB-918 was purchased from Qingdao Jimo Qingbao Slurry Factory;

[0043] Wax concentrate: WAX-1 was purchased from Hefei Runli Textile New Material Co., Ltd.;

[0044] Example 1

[0045] High-twist double-layer structure specifications: CM40V*CM40V*122*94*68.5.

[0046] The aforementioned process for improving the delamination of high-twist double-layer fabrics includes sizing and weaving processes:

[0047] The speed of the sizing process is 40m / min.

[0048] The sizing agent formula for the sizing process is as follows:

[0049] Starch 125g / L;

[0050] Acrylic slurry 25g / L;

[0051] Wax essence 1g / L;

[0052] The viscosity of the slurry is 7.6s, and the mass concentration is 10.4%.

[0053] The weaving process is carried out using a Tsudakoma multi-arm loom. The improvement of this equipment is based on Example 1 of patent CN113417054A.

[0054] The tension of the weaving process is 1.2kN, the machine speed is 644 rpm, the shedding time is 290°, and the tilt angle of the warp stop is 20°.

[0055] The fabric winding method in the weaving process involves using a lower pressure roller 3 in conjunction with a friction roller 1, and winding the fabric separately using a winding roller 4, without using a winding guide roller 5. Figure 1 As shown.

[0056] The weaving process is the threading technique.

[0057] ① 1 / 1 + 1 / 3*2 loop + 2 / 2 + 1 / 3*2 loop + / 2 (double-layer node complex frame);

[0058] ②2 / 3+1 / 3*4 loop + 1 / 2 (double-layer node complex frame);

[0059] ③ 1 / 3 * 6 cycles;

[0060] ④ 3 / 1 * 6 cycles;

[0061] ⑤ 1 / 1 + 1 / 3 * 4 cycles + 1 / 2 * 2 cycles;

[0062] ⑥2 / 1 + 3 / 1 * 5 cycles + 1 / ;

[0063] ⑦ and ⑧ are edge organization frames with a length of 2 / 2*6.

[0064] Example 1: Changing the heald threading method:

[0065] The delamination defect rate for high-twist double-layer fabric is 11.9%. The delamination defect rate is calculated as follows: (Number of meters of delamination defective fabric / Total production meters) * 100%.

[0066] The number of weft stops per 100,000 weft yarns is 5.9. The weft stop calculation method is: the number of times the loom stops within 100,000 weft yarns.

[0067] The table opening efficiency was 89.1%.

[0068] Example 2

[0069] High-twist double-layer structure specifications: CM40V*CM40V*108*83*65.7.

[0070] The aforementioned process for improving the delamination of high-twist double-layer fabrics includes sizing and weaving processes:

[0071] The speed of the machine in the sizing process is 48m / min.

[0072] The sizing agent formula for the sizing process is as follows:

[0073] Starch 120g / L;

[0074] Acrylic slurry 20g / L;

[0075] Wax essence 0.7g / L;

[0076] The viscosity of the slurry is 8.0s and the mass concentration is 11.5%.

[0077] The weaving process is carried out using a Tsudakoma multi-arm loom. The improvement of this equipment is based on Example 1 of patent CN113417054A.

[0078] The tension of the weaving process is 1.1 kN, the machine speed is 653 rpm, the shedding time is 290°, and the tilt angle of the warp stop is 20°.

[0079] The fabric winding method in the weaving process involves using a lower pressure roller 3 in conjunction with a friction roller 1, and winding the fabric separately using a winding roller 4, without using a winding guide roller 5. Figure 1 As shown.

[0080] The weaving process involves threading the palm fibers as follows:

[0081] The order of the pattern plates in the heddle frame arrangement is as follows:

[0082] ① 1 / 3 * 6 cycles;

[0083] ②3 / 1*6 cycles;

[0084] ③ 1 / 1 + 1 / 3 * 4 cycles + 1 / 2 * 2 cycles;

[0085] ④2 / 1 + 3 / 1 * 5 cycles + 1 / ;

[0086] ⑤ 1 / 1 + 1 / 3*2 loop + 2 / 2 + 1 / 3*2 loop + / 2 (double-layer node complex frame);

[0087] ⑥2 / 3+1 / 3*4 loop + 1 / 2 (double-layer node complex frame);

[0088] ⑦ and ⑧ are edge organization frames with a length of 2 / 2*6.

[0089] The delamination defect rate of the high-twist double-layer fabric in Example 2 was 7.7%. The delamination defect rate was calculated as: (Number of meters of delamination defective fabric / Total production meters) * 100%.

[0090] The number of weft stops per 100,000 weft yarns is 4.5. The weft stop calculation method is: the number of times the loom stops within 100,000 weft yarns.

[0091] The table opening efficiency is 90.89%.

[0092] Example 3

[0093] High-twist double-layer structure specifications: CM40V*CM40V*111*88*68.

[0094] The aforementioned process for improving the delamination of high-twist double-layer fabrics includes sizing and weaving processes:

[0095] The speed of the sizing process is 45m / min.

[0096] The sizing agent formula for the sizing process is as follows:

[0097] Starch 125g / L;

[0098] Acrylic slurry 25g / L;

[0099] Wax essence 1g / L;

[0100] The viscosity of the slurry is 7.8s and the mass concentration is 11%.

[0101] The weaving process is carried out using a Tsudakoma multi-arm loom. The improvement of this equipment is based on Example 1 of patent CN113417054A.

[0102] The tension of the weaving process is 1.0 kN, the machine speed is 650 rpm, the shedding time is 290°, and the warp stop tilt angle is 30°.

[0103] The fabric winding method in the weaving process involves using a lower pressure roller 3 in conjunction with a friction roller 1, and winding the fabric separately using a winding roller 4, without using a winding guide roller 5. Figure 1 As shown.

[0104] The weaving process involves threading the palm fibers as follows:

[0105] The order of the pattern plates in the heddle frame arrangement is as follows:

[0106] ① 1 / 3 * 6 cycles;

[0107] ②3 / 1*6 cycles;

[0108] ③ 1 / 1 + 1 / 3 * 4 cycles + 1 / 2 * 2 cycles;

[0109] ④2 / 1 + 3 / 1 * 5 cycles + 1 / ;

[0110] ⑤ 1 / 1 + 1 / 3*2 loop + 2 / 2 + 1 / 3*2 loop + / 2 (double-layer node complex frame);

[0111] ⑥2 / 3+1 / 3*4 loop + 1 / 2 (double-layer node complex frame);

[0112] ⑦ and ⑧ are edge organization frames with a length of 2 / 2*6.

[0113] The delamination defect rate of the high-twist double-layer fabric in Example 3 was 6.2%. The delamination defect rate was calculated as: (Number of meters of delamination defective fabric / Total production meters) * 100%.

[0114] The number of weft stops per 100,000 weft yarns is 3.7. The weft stop calculation method is: the number of times the loom stops within 100,000 weft yarns.

[0115] The table opening efficiency is 93.8%.

[0116] Comparative Example 1

[0117] Same as Example 1, except that the normal, conventional palm fiber weaving process is used:

[0118] ① and ② are side-organized holographic frames of 2 / 2*6;

[0119] ③ 1 / 3 * 6 cycles;

[0120] ④ 3 / 1 * 6 cycles;

[0121] ⑤ 1 / 1 + 1 / 3 * 4 cycles + 1 / 2 * 2 cycles;

[0122] ⑥2 / 1 + 3 / 1 * 5 cycles + 1 / ;

[0123] ⑦ 1 / 1 ​​+ 1 / 3*2 loop + 2 / 2 + 1 / 3*2 loop + / 2 (double-layer node complex frame);

[0124] ⑧2 / 3+1 / 3*4 loop+1 / 2 (double-layer node complex frame);

[0125] The delamination defect rate of the high-twist double-layer fabric in Comparative Example 1 was 23.8%; the opening efficiency was 82.1%.

[0126] Comparative Example 2

[0127] Similar to Embodiment 1, the difference lies in that an upper pressure roller 2 and a lower pressure roller 3 are used in conjunction with a friction roller 1, and a fabric winding roller 4 and a fabric winding guide roller 5 are used for winding, as shown below. Figure 2 As shown.

[0128] The delamination defect rate of the high-twist double-layer fabric in Comparative Example 2 was 21.9%; the opening efficiency was 86.7%.

[0129] Comparative Example 3

[0130] Same as Example 1, except that conventional sizing slurry is used.

[0131]

[0132] The viscosity of the slurry is 8.7s and the mass concentration is 10.3%.

[0133] The delamination defect rate of the high-twist double-layer fabric in Comparative Example 3 was 29.8%; the opening efficiency was 78.1%.

[0134] Comparative Example 4

[0135] Same as Example 1, except that the amount of sizing agent used is different:

[0136] The sizing agent formula for the sizing process is as follows:

[0137] Starch 140g / L;

[0138] Acrylic slurry 40g / L;

[0139] Wax essence 2g / L;

[0140] The viscosity of the slurry is 8.6s, and the mass concentration is 12.3%.

[0141] The delamination defect rate of the high-twist double-layer fabric in Comparative Example 4 was 19.7%; the opening efficiency was 84.1%.

[0142] Comparative Example 5

[0143] Same as Example 1, except that the amount of sizing agent used is different:

[0144] The sizing agent formula for the sizing process is as follows:

[0145] Starch 90g / L;

[0146] Acrylic slurry 10g / L;

[0147] Wax essence 1g / L;

[0148] The viscosity of the slurry is 6.8s and the mass concentration is 8.7%.

[0149] The delamination defect rate of the high-twist double-layer fabric in Comparative Example 5 was 26.1%; the opening efficiency was 80.2%.

Claims

1. A process for improving the delamination of high-twist double-layer fabrics, characterized in that, The process includes sizing and weaving. The sizing agent formula for the sizing process is as follows: Starch 120-130g / L; Acrylic slurry 20-30 g / L; Wax concentrate 0.5-1.5g / L; The tension in the weaving process is 0.8-1.2 kN; The threading process of the weaving procedure is as follows: The order of the pattern plates in the heddle frame arrangement is as follows: ① 1 / 3 * 6 cycles; ②3 / 1*6 cycles; ③ 1 / 1 + 1 / 3 * 4 cycles + 1 / 2 * 2 cycles; ④2 / 1 + 3 / 1 * 5 cycles + 1 / ; ⑤ Double-layer node structure: 1 / 1 + 1 / 3*2 cycle + 2 / 2 + 1 / 3*2 cycle + / 2; ⑥ Double-layer node structure: 2 / 3 + 1 / 3 * 4 loop + 1 / 2; ⑦ and ⑧ are edge organization holograms with a length of 2 / 2*6; The starch is a mixture of cassava etherified starch and corn grafted starch; The weaving process involves using a lower pressure roller (3) in conjunction with a friction roller (1) for winding, while the upper pressure roller (2) and the winding guide roller (5) are not in use.

2. The process for improving the delamination of high-twist double-layer fabric according to claim 1, characterized in that, The speed of the machine in the sizing process is 40-50 m / min.

3. The process for improving the delamination of high-twist double-layer fabric according to claim 1, characterized in that, The speed of the weaving process is 640-660 rpm.

4. The process for improving the delamination of high-twist double-layer fabric according to claim 1, characterized in that, The opening time of the weaving process is 286-294°.

5. The process for improving the delamination of high-twist double-layer fabric according to claim 1, characterized in that, The tilt angle of the warp stop frame in the weaving process is 20-40°.

6. The process for improving the delamination of high-twist double-layer fabric according to claim 1, characterized in that, The viscosity of the slurry is 7.6s-8.0s.

7. The process for improving the delamination of high-twist double-layer fabric according to claim 1, characterized in that, The mass concentration of the slurry is 10-12%.

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