A processing method for improving the wearing performance of sandwich fabric

Abstract

The present invention provides a processing method for improving the wearability of sandwich fabrics, relating to the technical field of fabric processing. The method includes processes such as weaving, moisture regain, blank setting, pretreatment, dyeing, soaping, and final shaping. By using viscose filaments with a specific twist as connecting yarns and combining them with specific dyeing and finishing processes, it overcomes problems encountered in sandwich fabric production, such as "showing the base," poor anti-pilling and anti-snagging properties, insufficient body, and low fiber loss resistance.

Description

Technical Field

[0001] The invention relates to the technical field of fabric processing, and in particular to a processing method for improving the wearing performance of sandwich fabric. Background Art

[0002] Sandwich fabrics are a type of synthetic fabric originally woven on warp knitting machines. They consist of three surfaces: top, middle, and bottom. Sandwich fabrics offer a variety of colors, are easily blended, and offer excellent elasticity. They also offer excellent breathability, windproofing, waterproofing, and warmth retention. They are primarily used in sports shoes, sportswear, backpacks, and other applications.

[0003] Existing sandwich fabrics can also be woven by weft knitting machines. The upper and lower surfaces are generally made of cotton fibers, and the connecting yarn in the middle can be polyester or cotton fibers. The following problems are common: (1) When polyester MONO yarn is used as the connecting yarn, since polyester MONO yarn is very hard, it is easy to pierce the cotton yarn surface and show the top after dyeing and finishing, commonly known as "showing the bottom". In order to overcome this problem and make the outer surface of the fabric appear uniform in color, only cotton and polyester double dyeing process can be carried out, which increases the production process and production cost; (2) When 50D / 24F or 48FDTY yarn is used as the connecting yarn, the softness is improved and the "showing the bottom" phenomenon is greatly reduced, but the supporting force of the connecting yarn is low and is not enough to support the middle layer, resulting in a reduced sense of thickness of the fabric and poor anti-pilling performance; (3) When 80S combed cotton yarn is used as the connecting yarn, the "showing the bottom" and anti-pilling problems can be solved, but the fabric is soft and lacks thickness. In addition, the hairiness washed off the middle layer after enzyme washing is difficult to completely remove, which will lead to a reduction in the fiber loss fastness of the fabric.

[0004] It can be seen that at present, in the preparation of sandwich fabrics, problems such as "exposed bottom" of the fabric, poor anti-pilling and anti-snagging performance, insufficient fullness, and low fiber loss fastness are difficult to solve at the same time, which restricts the development of the industry and the application of sandwich fabrics. Summary of the Invention

[0005] To solve the above problems, the present invention provides a processing method for improving the wearing performance of sandwich fabrics. By using viscose filaments with a specific twist as connecting yarns and combining them with specific dyeing and finishing processes, the dyeing and finishing processes of the sandwich fabrics are simplified, and a sandwich fabric with good anti-pilling and anti-snagging properties, no "bottom exposure", rich hand feel, and no fiber shedding is obtained.

[0006] The processing method for improving the wearing performance of sandwich fabrics according to the present invention comprises the following steps:

[0007] S1. Weaving: Sandwich fabrics are woven on a double-sided weft knitting circular machine;

[0008] The weaving materials of the sandwich fabric are cotton, viscose filament and spandex, wherein the viscose filament is used as a connecting yarn; the twist of the viscose filament is 800;

[0009] S2, moisture regain: loosening the fabric and performing moisture regain treatment;

[0010] Since the sandwich fabric is relatively thick and heavy, it is subjected to uneven force during the weaving process, which easily leads to unstable weight. Therefore, the present invention performs a moisture regain treatment on the sandwich fabric after the fabric is loosened to remove the internal stress of weaving, so that the fibers can fully shrink and the weight of the sandwich fabric tends to be stable.

[0011] S3, blank setting: the fabric after moisture regain is blank set;

[0012] S4, pre-treatment: immerse the blanked fabric in a treatment solution for pre-treatment;

[0013] S5. Dyeing: Use enzyme washing and reactive dyes to dye the fabric in one bath and two steps;

[0014] S6. Soaping: Soaping the dyed fabric in a soaping agent;

[0015] S7, final product shaping: shaping the fabric after soaping to obtain a finished sandwich fabric.

[0016] Furthermore, in the S1, the machine specification is 24 needles × 34 inches, the total number of needles is 2568 needles, and the weight of the sandwich fabric is 450g / m 2 .

[0017] Furthermore, in S2, the rehumidification temperature is 20°C-25°C, and the rehumidification time is ≥12h.

[0018] Furthermore, in S2, the rehumidification is performed by spraying steam in a rehumidification machine to accelerate the rehumidification efficiency and significantly shorten the rehumidification time.

[0019] Furthermore, in said S3, the blank is set on a Monforts setting machine.

[0020] Furthermore, in S3, the blank temperature is set at 205° C., and the blank speed is set at 18 m / min.

[0021] Furthermore, in S4, the pretreatment liquid includes the following raw materials: refined penetrant AP8000 0.5 g / L, refined emulsifier SEN 1.0 g / L, hydrogen peroxide stabilizer ST-500 0.24 g / L, caustic soda 3 g / L, and hydrogen peroxide 5.0 g / L.

[0022] Furthermore, in S4, the pretreatment temperature is 98° C. and the pretreatment time is 45 minutes.

[0023] Furthermore, in S5, the enzyme washing solution includes the following raw materials: 0.2 g / L glacial acetic acid and 1.3 g / L neutral polishing enzyme.

[0024] Furthermore, in S5, the enzyme washing temperature is 55° C. and the enzyme washing time is 50 minutes.

[0025] Furthermore, in S5, the dyeing dye includes the following raw materials: reactive orange S-3RM 0.65%, reactive red S-B1 50% 0.48%, reactive black B1 33% 2.9%, sodium sulfate 80g / L, and soda ash 20g / L.

[0026] Furthermore, in S5, the dyeing temperature is 60° C. and the dyeing time is 50 minutes.

[0027] Furthermore, in S6, the soaping agent is RY-280 neutral soaping agent with a concentration of 0.23 g / L.

[0028] Furthermore, in S6, the soaping temperature is 97° C. and the soaping time is 10 minutes.

[0029] Furthermore, in S7, the shaping temperature is 140° C. and the shaping speed is 12 m / min.

[0030] Viscose filaments are used as connecting yarns. They belong to the same cellulose fiber as cotton fibers and can be dyed in the same bath with reactive dyes. Compared with the cotton-polyester double dyeing process, the dyeing and finishing process is greatly simplified. The present invention moderately twists the viscose filaments, which can not only improve the stiffness of the yarn, making it easier for the yarn to stretch the upper and lower layers of fabric to increase the space in the middle layer and increase the rich feel of the fabric, but also increase the cohesion of each single filament in the viscose filaments, making it less likely to be pulled out during friction or pricking, thereby improving the anti-pilling and anti-snagging properties. The viscose filaments of the present invention have a smooth surface and are free of fuzz. Enzyme washing is basically ineffective against them, avoiding the problem of reduced fiber loss fastness.

[0031] Compared with the prior art, the present invention has the following beneficial technical effects:

[0032] (1) The present invention solves the problems of conventional cotton / polyester / spandex or cotton / spandex sandwich fabrics, such as irregular "exposed bottom", poor anti-pilling and anti-snagging performance, insufficient fullness, and low fiber loss fastness, by using viscose filaments in combination with a specific dyeing and finishing process;

[0033] (2) The present invention overcomes the problems that when cotton fibers are dyed alone, the surface of the cloth will appear white, and when cotton and polyester are dyed together, not only the dyeing process is long and the cost is high, but also cotton and polyester are difficult to dye at the same time, resulting in the cloth surface being "double-colored";

[0034] (3) The present invention simplifies the preparation process of sandwich fabrics, improves the production efficiency of fabrics, and has good application prospects. DETAILED DESCRIPTION

[0035] The technical solution provided by the present invention is further described below with reference to embodiments.

[0036] The adhesive filaments used in the embodiments of the present invention were purchased from Xinxiang Chemical Fiber Co., Ltd., the scouring penetrant AP800 was purchased from Shanghai Dingxu Industry and Trade Co., Ltd., the scouring emulsifier SEN was purchased from Jiangsu Shouxin Chemical Co., Ltd., the hydrogen peroxide stabilizer ST-50 was purchased from Wuxi Yuda Fine Chemical Co., Ltd., the reactive orange S-3RM was purchased from three dyes purchased from Shangyu Jinglian Trading Co., Ltd., the reactive sauce red SB was purchased from three dyes purchased from Shangyu Jinglian Trading Co., Ltd., the reactive black was purchased from three dyes purchased from Shangyu Jinglian Trading Co., Ltd., and the RY-280 neutral soaping agent was purchased from Ruiying Textile Technology Co., Ltd.

[0037] Example 1 A processing method for improving the wearing performance of sandwich fabrics, comprising the following steps:

[0038] (1) Weaving:

[0039] Fabric type: cotton / viscose filament / spandex sandwich fabric, weight 450g / m 2 ;

[0040] Front / back: long-staple cotton combed bleached yarn 36S interwoven with spandex 30D; connecting yarn: viscose filament 75D, twist 800;

[0041] Knitted on a double-sided weft circular knitting machine with a machine specification of 24 needles x 34 inches and a total of 2568 needles;

[0042] (2) Dyeing and finishing process:

[0043] Production process: fabric distribution → moisture regain (25℃) → blank setting (205℃) → pre-treatment → dyeing → finished product setting (140℃)

[0044] ① Resurgence 12h;

[0045] ② Blank setting: carried out on a Monfushi setting machine, temperature 205℃, speed 18m / min; ③ Pretreatment:

[0046]

[0047] ④ Dyeing:

[0048] It adopts enzyme washing and reactive dye one bath two-step dyeing method.

[0049] Enzyme wash:

[0050]

[0051] dyeing:

[0052]

[0053] Soaping:

[0054] Soap detergent RY-280 0.23g / L,

[0055] Temperature 95℃,

[0056] Time: 10 minutes;

[0057] ⑤Finished product shaping:

[0058] Temperature 140℃, speed 12m / min.

[0059] Comparative Example 1

[0060] Same as Example 1, except that:

[0061] Fabric type: Cotton / polyester / spandex sandwich fabric, weight 450g / m 2 ; Front / back: long-staple cotton combed bleached yarn 36S interwoven with spandex 30D; connecting yarn: polyester 75D / 36F.

[0062] Comparison column 2

[0063] Same as Example 1, except that:

[0064] Fabric type: cotton / spandex sandwich fabric, weight 450g / m 2 ; Front / back: long-staple cotton combed bleached yarn 36S interwoven with spandex 30D; connecting yarn: long-staple cotton 80S.

[0065] Test Example 1

[0066] The sandwich fabrics of the embodiment and the comparative example were tested for appearance, richness, anti-pilling performance, anti-snagging performance, and fiber loss fastness. The test standards are as follows:

[0067] Anti-pilling performance: GB / T4802.2-2008 "Textile fabrics - Determination of propensity to fuzzing and pilling - Part 2: Modified Martindale method" 2500 rpm;

[0068] Anti-snagging performance: GB / T11047-2008 "Textile fabrics - Assessment of snagging performance - Hammer method";

[0069] Fiber loss fastness: ANTA internal control standard, ANTA quality [regulation] J3054-2019, clothing physical and chemical test method - fiber loss.

[0070] The test results are shown in Table 1.

[0071] Table 1

[0072]

[0073] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A processing method for improving the wearing performance of sandwich fabrics, characterized in that: The following steps are involved: S1. Weaving: Sandwich fabrics are woven on a double-sided weft knitting circular machine; The weaving materials of the sandwich fabric are cotton, viscose filament and spandex, wherein the viscose filament is used as a connecting yarn; the front and back sides are interwoven with long-staple cotton combed bleached yarn 36S and spandex 30D; the viscose filament is viscose filament 75D with a twist of 800; S2, moisture regain: loosening the fabric and performing moisture regain treatment; S3, blank setting: the fabric after moisture regain is blank set; S4, pre-treatment: immerse the blanked fabric in a treatment solution for pre-treatment; S5. Dyeing: Use enzyme washing and reactive dyes to dye the fabric in one bath and two steps; S6. Soaping: Soaping the dyed fabric in a soaping agent; S7, final product shaping: shaping the fabric after soaping to obtain a finished sandwich fabric.

2. A processing method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In the S2, the rehumidification temperature is 20°C-25°C, and the rehumidification time is ≥12 h.

3. The method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In the above-mentioned S3, the blank temperature is set at 205° C. and the blank speed is set at 18 m / min.

4. The method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In the S4, the pretreatment liquid includes the following raw materials: 0.5 g / L of scouring penetrant AP800, 1.0 g / L of scouring emulsifier SEN, 0.24 g / L of hydrogen peroxide stabilizer ST-50, 3 g / L of caustic soda, and 5.0 g / L of hydrogen peroxide.

5. The method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In the S4, the pretreatment temperature is 98° C. and the pretreatment time is 45 min.

6. The method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In S5, the enzyme washing solution includes the following raw materials: 0.2 g / L glacial acetic acid and 1.3 g / L neutral polishing enzyme.

7. The method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In S5, the enzyme washing temperature is 55° C. and the enzyme washing time is 50 min.

8. The method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In the S5, the dyeing dye includes the following raw materials: Reactive Orange S-3RM 0.65%, Reactive Red SB 150% 0.48%, Reactive Black B133% 2.9%, Sodium sulfate 80 g / L, and soda ash 20 g / L.

9. The method for improving the wearing performance of sandwich fabric according to claim 1, characterized in that: In the above-mentioned S5, the dyeing temperature is 60° C. and the dyeing time is 50 min.

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