Tensionless dyeing environment-friendly type super-hidden sweat stain yarn-dyed fabric and preparation method thereof

Abstract

The application discloses a tension-free dyeing environment-friendly type super-hidden sweat-stain yarn-dyed fabric and a preparation method thereof, and relates to the technical field of textiles.The process of the application is in turn fabric structure design, tension-free star cage dyeing, weaving and post-finishing; the warp yarn is cotton-polyester core-spun yarn, the weft yarn is arranged in cross section and is composed of cross section polyester and PTT / PET bicomponent elastic polyester, and the weave is twill weave; and the rotary screen printing adopts fluorine-free sizing material.The fabric is waterproof on the front side and can quickly guide moisture on the back side, has a wrinkle resistance of greater than or equal to 3.2 levels, a weft elastic elongation of greater than or equal to 12%, is free of fluorine and formaldehyde, and solves the defects of traditional fabric, such as sweatiness, fluorine, poor elasticity and easy sweat-stain, and is green, environment-friendly and suitable for summer woven shirts.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a tension-free dyeing environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric and its preparation method. Background Technology

[0002] With the fast pace of modern life, consumers' demands for textiles are no longer limited to warmth, quick-drying, and wrinkle resistance; they are increasingly demanding higher levels of technological sophistication. In the hot summer, excessive sweating can cause embarrassment, making sweat-resistant fabrics a new choice for summer shirts.

[0003] Currently, most knitted products on the market are made with a single-layer waterproof and breathable fabric, which suffers from problems such as heavy fabric weight, stuffiness, and poor drape. Chinese utility model patent CN217651504U discloses a single-layer waterproof and breathable fabric, which includes a waterproof layer, a waterproof layer, a base layer, and a softening layer. The large number of layers makes it unsuitable for the lightweight summer clothing needs. Chinese invention patent CN118704240A discloses a single-layer waterproof and breathable deodorizing fabric and its preparation method. This fabric undergoes pretreatment with chemicals such as ether, acetone, and acetic acid, followed by hydrophilic deodorizing finishing. The use of numerous chemical agents and the complex processing procedures pose potential hazards to human health and the environment. Chinese invention patent CN103009763B discloses a single-layer waterproof and breathable quick-drying fabric and its production method. The preferred waterproofing agent is a fluorocarbon polymer, which fails to meet the fluorine-free requirements of Japanese and European / American customers. Furthermore, many single-layer waterproof and breathable garments on the market use fluorinated compounds for finishing processes, posing potential harm to human health and the environment.

[0004] Therefore, developing a new type of environmentally friendly, moisture-wicking, and stain-concealing shirt fabric that is fluorine-free and highly efficient in wicking away moisture has become an essential need for the industry. Summary of the Invention

[0005] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a tension-free dyed environmentally friendly ultra-hygroscopic yarn-dyed fabric and its preparation method. Through raw material innovation and process synergy, it achieves a balance between single-sided waterproofing and environmental protection. No chemical anti-wrinkle agents are used in the finishing process, and the fabric has excellent wrinkle resistance and washability. It is waterproof on the front and absorbent on the back, solving the problems of stuffiness and slow moisture dissipation in existing waterproof finishing processes. No fluorinated auxiliaries are used in the production process, meeting consumers' demand for a healthy and environmentally friendly lifestyle.

[0006] The technical solution of this invention is as follows: On the one hand, this invention provides a method for preparing a tension-free dyed environmentally friendly ultra-repellent sweat-resistant yarn-dyed fabric, including fabric structure design → dyeing → weaving → finishing processes: (1) Fabric structure design: The outer layer of the warp yarn is made of cotton fiber, and the middle is made of polyester with a core fineness of 20~30D; the weft yarn is made of a cross-arranged polyester with a shaped cross section and a bicomponent elastic polyester; the weave structure is a twill weave with visible warp yarns. (2) Dyeing: Tensionless star cage dyeing equipment is used to dye the warp yarns with reactive dyes and the weft yarns with disperse dyes, followed by washing, softening and drying; (3) Weaving: The dyed warp yarns are slit and sized, and then woven according to the fabric structure designed in step (1) to obtain the yarn-dyed fabric. (4) Finishing: The yarn-dyed fabric obtained in step (3) is singed, desized, mercerized, printed on a circular screen, set at high temperature, washed, stretched and set, and pre-shrinked to obtain a tension-free dyed environmentally friendly ultra-swet-resistant yarn-dyed fabric. In step (4), the rotary screen printing process uses a fluorine-free paste, which includes waterproofing agent TF-501M 100~150g / L, crosslinking agent TF-569P 10~20g / L, thickener FN01 60~80g / L, and anti-penetration agent FS-30 10~20g / L.

[0007] Preferably, in step (1), the warp yarn count is 30-50 English count, the outer layer of the warp yarn contains 80-85 wt.% cotton fiber, and the middle polyester core contains 15-20 wt.% polyester fiber, and the yarn is obtained by blending and core-spun yarn; the weft yarn count is 75-150D, the shaped cross section polyester is a cross section, and the bicomponent elastic polyester is made of PTT and PET composite spinning; the weave structure is 2 / 2 twill, 2 / 1 twill, 3 / 3 twill or 3 / 1 twill.

[0008] Preferably, in step (2), the warp and weft yarns are wound into tension-free yarn bundles, and then the tension-free yarn bundles are filled layer by layer into the star cage. After filling, the star cage yarn frame is obtained. The yarn density in the star cage is controlled to be 0.28~0.32g / cm by a tension-free yarn bundle pressing machine. 3 After the tension-free yarn bundles inside the star cage are compacted and fixed by a pressing and sealing device, they are transferred to the main cylinder of the dyeing machine of the star cage dyeing device. After sealing the equipment, the working liquid circulation method is used for processing.

[0009] Preferably, in step (4), the singeing is performed using a one-forward and one-backward singeing method, with a machine speed of 80~100m / min, a flame intensity of 8~12mbar, and the burner position is cut-burning; the desizing is performed using high-temperature enzyme desizing, adding 2~5g / L of degreasing agent TF109H, steaming at 95~98℃ for 20~30min, then washing with water at 85~95℃ for 5~10min, then washing with water in 40~50℃ for 3~5min, and then drying in a drying drum.

[0010] Preferably, in step (4), the alkali concentration of the mercerizing process is 15~20 Baume degrees, the machine speed is 25~40m / min, the alkali temperature is 15~30℃, the water washing tank temperature is 60~80℃, and the fabric pH value is 5~7.

[0011] Preferably, in step (4), during the rotary screen printing process, the SP nickel screen has a mesh count of 105~155. The amount of fluorine-free paste penetration is controlled by adjusting the magnetic force and magnetic rod. The magnetic rod is 10~16mm, the magnetic force is 50~80%, the machine speed is 30~45m / min, and the viscosity of the fluorine-free paste is controlled at 28000~35000cp.

[0012] Preferably, in step (4), high-temperature shaping is performed on a tenter frame, the width is expanded to the finished product width + 5~8cm, the oven temperature is 150~160℃, and the machine speed is 40~50m / min.

[0013] Preferably, in step (4), the washing is carried out on a washing machine with 8 washing tanks. The washing temperature is 40~60℃. 5~10g / L of soda ash is added to the first washing tank. The machine speed is 40~60m / min. The pH value of the fabric is 5~7. The auxiliary agents and dosage used in the stretching and setting process are: acid-base stabilizer PH-X 1~3g / L; the expansion is the finished width + 4~6cm.

[0014] Preferably, in step (4), the pre-shrinking speed is 50~70m / min, the cloth moisture content is 4~6%, and the pressure distance is 4~8mm.

[0015] On the other hand, the present invention provides a tension-free dyeing environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric, which is prepared by the above-mentioned method for preparing tension-free dyeing environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric.

[0016] Compared with the prior art, the present invention has the following advantages: In terms of fabric structure design, this invention uses cotton-wrapped polyester filament for the warp yarns to improve the fabric's crispness and wrinkle resistance; the weft yarns use irregularly shaped polyester, and the twill weave design increases the absorption and diffusion of moisture on the skin-friendly side. Tension-free star cage dyeing equipment is used to ensure even dyeing and elasticity of the yarns. After pretreatment, the yarn-dyed fabric is printed with an environmentally friendly, waterproof, fluorine-free paste onto the front side using a rotary screen printing machine. Through high-temperature setting, washing, stretching, and pre-shrinking, an environmentally friendly, ultra-repellent fabric is obtained. The fabric is waterproof on the front and hydrophilic on the back, with a waterproof rating of over 80 points on the front, a water absorption rate of less than 60 seconds on the back, a wrinkle resistance rating of over 3.2, and a weft elongation of over 12%. It is highly shape-retaining, easy to care for, fluorine-free, formaldehyde-free, and more environmentally friendly and healthy. Attached Figure Description

[0017] Figure 1This is a test image of the front waterproofing of the tension-free dyed environmentally friendly ultra-hidden sweat stain yarn-dyed fabric prepared in Example 1 of the present invention.

[0018] Figure 2 This is a test image of the reverse side water absorption of the tension-free dyed environmentally friendly ultra-hidden sweat stain yarn-dyed fabric prepared in Example 1 of the present invention.

[0019] Figure 3 This is a test image of the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric prepared in Example 1 of the present invention, showing that water drips from the reverse side but does not penetrate the front side. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below in conjunction with the embodiments of this invention.

[0021] Example 1 The preparation method of the tension-free dyed environmentally friendly ultra-hygroscopic yarn-dyed fabric in this embodiment includes fabric structure design → dyeing → weaving → finishing process, specifically including the following steps: (1) Fabric structure design: The outer layer of the warp yarn is made of cotton fiber with a count of 40 English count. The core is made of polyester with a fineness of 30D. The cotton fiber content is 80wt.% and the polyester core content is 20wt.%. The yarn is obtained by blending and core-spun yarn. The weft yarn is made of a cross-section polyester yarn and a bicomponent elastic polyester yarn made of PTT and PET composite spinning, with a count of 150D. The weft structure is 2 / 2 twill.

[0022] (2) Dyeing: A tension-free star cage dyeing machine is used. Reactive dyes Reactive Blue BC-4R and Reactive Red EC-2BL are used to dye the warp yarns, and disperse dyes Disperse Blue SC-SE and Disperse Red SC-SE are used to dye the weft yarns. The yarns are then washed, softened, and dried. Specifically, the warp and weft yarns are wound into tension-free yarn bundles, and then the tension-free yarn bundles are filled layer by layer into the star cage. Once filled, the star cage yarn frame is obtained. The yarn density inside the star cage is controlled to be 0.29 g / cm³ using a tension-free yarn bundle pressing machine. 3 After the tension-free yarn bundles inside the star cage are compacted and fixed by a pressing and sealing device, they are transferred to the main cylinder of the dyeing machine of the star cage dyeing device. After sealing the equipment, the working liquid circulation method is used for processing.

[0023] (3) Weaving: The dyed warp yarns are slit and sized, and then woven according to the fabric structure designed in step (1) to obtain the yarn-dyed fabric.

[0024] (4) Finishing: The yarn-dyed fabric obtained in step (3) is singed, desized, mercerized, printed on a circular screen, set at high temperature, washed, stretched and set, and pre-shrinked to obtain a tension-free dyed environmentally friendly ultra-sweat-resistant yarn-dyed fabric.

[0025] In step (4), the singeing is performed in a forward and reverse manner, with a speed of 80 m / min, a flame intensity of 8 mbar, and the vent position being cut.

[0026] Desizing was performed using the high-temperature enzyme DS-HT, with 2 g / L of degreasing agent TF109H added. The mixture was steamed at 95°C for 20 minutes, then washed with water at 95°C for 5 minutes, followed by washing in water at 50°C for 3 minutes, and finally dried in a drying drum.

[0027] The mercerizing process uses an alkali concentration of 15 Baume, a machine speed of 25 m / min, an alkali temperature of 30℃, a washing tank temperature of 80℃, and a fabric pH of 7.

[0028] Rotary screen printing uses fluorine-free ink, with an SP nickel screen mesh count of 105. The ink penetration is controlled by adjusting the magnetic force and magnetic rod. The magnetic rod is 16mm, the magnetic force is 80%, and the machine speed is 30m / min. The fluorine-free ink includes waterproofing agent TF-501M 150g / L, crosslinking agent TF-569P 20g / L, thickener FN01 80g / L, and anti-penetration agent FS-30 20g / L; the viscosity is controlled at 35000cp.

[0029] High-temperature setting is performed on a tenter frame, expanding the width to the finished product width + 8cm, with the oven temperature at 160℃ and the machine speed at 50m / min.

[0030] The washing is carried out on a washing machine with 8 washing tanks. The washing temperature is 40℃. 5g / L of soda ash is added to the first washing tank. The machine speed is 40m / min and the pH value of the fabric is 5.

[0031] The additives and dosages used in the tenter frame setting process are as follows: acid-base stabilizer PH-X 1g / L; the width expansion is the finished width + 4cm.

[0032] Pre-shrinkage speed 70m / min, fabric moisture content 6%, compression distance 8mm.

[0033] Example 2 The preparation method of the tension-free dyed environmentally friendly ultra-hygroscopic yarn-dyed fabric in this embodiment includes fabric structure design → dyeing → weaving → finishing process, specifically including the following steps: (1) Fabric structure design: The outer layer of the warp yarn is made of cotton fiber with a count of 30 English. The core is made of polyester with a fineness of 30D. The cotton fiber content is 85wt.% and the polyester core content is 15wt.%. The yarn is obtained by blending and core-spun yarn. The weft yarn is made of a cross-section polyester yarn and a bicomponent elastic polyester yarn made of PTT and PET composite spinning, with a count of 150D. The weft structure is 2 / 1 twill.

[0034] (2) Dyeing: A tension-free star cage dyeing device is used. Reactive blue B C-4R is used to dye the warp yarns, and disperse blue B SE-RPD and disperse red SC-SE are used to dye the weft yarns. The yarns are then washed, softened, and dried. Specifically, the warp and weft yarns are wound into tension-free yarn bundles, and then the tension-free yarn bundles are filled layer by layer into the star cage. Once filled, the star cage yarn frame is obtained. The yarn density inside the star cage is controlled to be 0.32 g / cm² using a tension-free yarn bundle pressing machine. 3 After the tension-free yarn bundles inside the star cage are compacted and fixed by a pressing and sealing device, they are transferred to the main cylinder of the dyeing machine of the star cage dyeing device. After sealing the equipment, the working liquid circulation method is used for processing.

[0035] (3) Weaving: The dyed warp yarns are slit and sized, and then woven according to the fabric structure designed in step (1) to obtain the yarn-dyed fabric.

[0036] (4) Finishing: The yarn-dyed fabric obtained in step (3) is singed, desized, mercerized, printed on a circular screen, set at high temperature, washed, stretched and set, and pre-shrinked to obtain a tension-free dyed environmentally friendly ultra-sweat-resistant yarn-dyed fabric.

[0037] In step (4), the singeing is carried out in a forward and reverse singeing manner, with a speed of 100m / min, a flame intensity of 12mbar, and the vent position is cut-burning.

[0038] Desizing was performed using the high-temperature enzyme DS-HT, with 5 g / L of degreasing agent TF109H added. The mixture was steamed at 98°C for 30 minutes, then washed with water at 85°C for 10 minutes, followed by washing in water at 40°C for 5 minutes, and finally dried in a drying drum.

[0039] The mercerizing process uses an alkali concentration of 20 Baume, a machine speed of 40 m / min, an alkali temperature of 30℃, a washing tank temperature of 60℃, and a fabric pH of 5.

[0040] Rotary screen printing uses fluorine-free ink, with an SP nickel screen mesh count of 125. The ink penetration is controlled by adjusting the magnetic force and magnetic rod. The magnetic rod is 10mm, the magnetic force is 50%, and the machine speed is 45m / min. The fluorine-free ink includes waterproofing agent TF-501M 100g / L, crosslinking agent TF-569P 10g / L, thickener FN01 60g / L, and anti-penetration agent FS-30 10g / L; the viscosity is controlled at 28000cp.

[0041] High-temperature setting is performed on a tenter frame, expanding the width to the finished product width + 5cm, with the oven temperature at 150℃ and the machine speed at 50m / min.

[0042] The washing is carried out on a washing machine with 8 washing tanks. The washing temperature is 60℃. 10g / L of soda ash is added to the first washing tank. The machine speed is 60m / min and the pH value of the fabric is 7.

[0043] The additives and dosages used in the tenter frame setting process are as follows: acid-base stabilizer PH-X 3g / L; the width expansion is the finished width + 6cm.

[0044] Pre-shrinkage speed 50m / min, fabric moisture content 4%, compression distance 4mm.

[0045] Example 3 The preparation method of the tension-free dyed environmentally friendly ultra-hygroscopic yarn-dyed fabric in this embodiment includes fabric structure design → dyeing → weaving → finishing process, specifically including the following steps: (1) Fabric structure design: The outer layer of the warp yarn is made of cotton fiber with a count of 50 English count. The core is made of polyester with a core fineness of 20D. The cotton fiber content is 84wt.% and the polyester core content is 16wt.%. The yarn is obtained by blending and core-spun yarn. The weft yarn is made of a cross-section polyester yarn and a bicomponent elastic polyester yarn made of PTT and PET composite spinning, with a count of 100D. The weft structure is 3 / 3 twill.

[0046] (2) Dyeing: A tension-free star cage dyeing machine was used. Reactive blue dye BLUE C-BRF was used to dye the warp yarns, and disperse dyes disperse blue SC-SE and disperse yellow SC-ACE were used to dye the weft yarns. The yarns were then washed, softened, and dried. Specifically, the warp and weft yarns were wound into tension-free yarn bundles, and then the tension-free yarn bundles were filled layer by layer into the star cage. After filling, the star cage yarn frame was obtained. The yarn density inside the star cage was controlled to be 0.28 g / cm³ using a tension-free yarn bundle pressing machine. 3 After the tension-free yarn bundles inside the star cage are compacted and fixed by a pressing and sealing device, they are transferred to the main cylinder of the dyeing machine of the star cage dyeing device. After sealing the equipment, the working liquid circulation method is used for processing.

[0047] (3) Weaving: The dyed warp yarns are slit and sized, and then woven according to the fabric structure designed in step (1) to obtain the yarn-dyed fabric.

[0048] (4) Finishing: The yarn-dyed fabric obtained in step (3) is singed, desized, mercerized, printed on a circular screen, set at high temperature, washed, stretched and set, and pre-shrinked to obtain a tension-free dyed environmentally friendly ultra-sweat-resistant yarn-dyed fabric.

[0049] In step (4), the singeing is performed in a forward and reverse manner, with a speed of 90 m / min, a flame intensity of 10 mbar, and the vent position being cut.

[0050] Desizing was performed using the high-temperature enzyme DS-HT, with the addition of 3g / L of degreasing agent TF109H. The mixture was steamed at 96℃ for 25 minutes, then washed with water at 90℃ for 8 minutes, followed by washing in water at 45℃ for 4 minutes, and finally dried in a drying drum.

[0051] The mercerizing process uses an alkali concentration of 18 Baume, a machine speed of 30 m / min, an alkali temperature of 20°C, a washing tank temperature of 70°C, and a fabric pH of 6.

[0052] Rotary screen printing uses fluorine-free ink, with an SP nickel screen mesh count of 155. The ink penetration is controlled by adjusting the magnetic force and magnetic rod. The magnetic rod is 12mm, the magnetic force is 60%, and the printing speed is 40m / min. The fluorine-free ink includes waterproofing agent TF-501M 120g / L, crosslinking agent TF-569P 15g / L, thickener FN01 70g / L, and anti-penetration agent FS-30 15g / L; the viscosity is controlled at 31000cp.

[0053] High-temperature setting is performed on a tenter frame, expanding the width to the finished width + 6cm, with the oven temperature at 155℃ and the machine speed at 45m / min.

[0054] The washing is carried out on a washing machine with 8 washing tanks. The washing temperature is 50℃. 8g / L of soda ash is added to the first washing tank. The machine speed is 50m / min. The pH value of the fabric is 6.2.

[0055] The additives and dosages used in the tenter frame setting process are as follows: acid-base stabilizer PH-X 1.5g / L; the width expansion is the finished width + 5cm.

[0056] Pre-shrinkage speed 60m / min, fabric moisture content 5%, compression distance 6mm.

[0057] Example 4 The preparation method of the tension-free dyed environmentally friendly ultra-hygroscopic yarn-dyed fabric in this embodiment includes fabric structure design → dyeing → weaving → finishing process, specifically including the following steps: (1) Fabric structure design: The outer layer of the warp yarn is made of cotton fiber with a count of 40 English count. The core is made of polyester with a fineness of 30D. The cotton fiber content is 80wt.% and the polyester core content is 20wt.%. The yarn is obtained by blending and core-spun yarn. The weft yarn is made of a cross-section polyester yarn and a bicomponent elastic polyester yarn made of PTT and PET composite spinning, with a count of 150D. The weft structure is 3 / 1 twill.

[0058] (2) Dyeing: Tension-free star cage dyeing equipment was used. Reactive dyes BLUE C-BRF and YELLOW 3RS HC were used to dye the warp yarns, and disperse dyes SC-SE, SC-SE, and SC-ACE were used to dye the weft yarns. The yarns were then washed, softened, and dried. Specifically, the warp and weft yarns were wound into tension-free yarn bundles, and then the tension-free yarn bundles were filled layer by layer into the star cage. After filling, the star cage yarn frame was obtained. The yarn density inside the star cage was controlled to be 0.3 g / cm³ using a tension-free yarn bundle pressing machine. 3 After the tension-free yarn bundles inside the star cage are compacted and fixed by a pressing and sealing device, they are transferred to the main cylinder of the dyeing machine of the star cage dyeing device. After sealing the equipment, the working liquid circulation method is used for processing.

[0059] (3) Weaving: The dyed warp yarns are slit and sized, and then woven according to the fabric structure designed in step (1) to obtain the yarn-dyed fabric.

[0060] (4) Finishing: The yarn-dyed fabric obtained in step (3) is singed, desized, mercerized, printed on a circular screen, set at high temperature, washed, stretched and set, and pre-shrinked to obtain a tension-free dyed environmentally friendly ultra-sweat-resistant yarn-dyed fabric.

[0061] In step (4), the singeing is performed in a forward and reverse manner, with a speed of 95 m / min, a flame intensity of 12 mbar, and the vent position is cut-and-burn.

[0062] Desizing was performed using the high-temperature enzyme DS-HT, with 4 g / L of degreasing agent TF109H added. The mixture was steamed at 97°C for 25 minutes, then washed with water at 92°C for 6 minutes, followed by washing in water at 48°C for 5 minutes, and finally dried in a drying drum.

[0063] The mercerizing process uses an alkali concentration of 18 Baume, a machine speed of 35 m / min, an alkali temperature of 25℃, a washing tank temperature of 65℃, and a fabric pH of 6.5.

[0064] Rotary screen printing uses fluorine-free ink, with an SP nickel screen mesh count of 125. The ink penetration is controlled by adjusting the magnetic force and magnetic rod. The magnetic rod is 12mm in diameter, the magnetic force is 70%, and the printing speed is 35m / min. The fluorine-free ink includes waterproofing agent TF-501M 130g / L, crosslinking agent TF-569P 18g / L, thickener FN01 65g / L, and anti-penetration agent FS-30 18g / L; the viscosity is controlled at 33000cp.

[0065] High-temperature setting is performed on a tenter frame, expanding the width to the finished product width + 7cm, with a drying oven temperature of 152℃ and a machine speed of 46m / min.

[0066] The washing is carried out on a washing machine with 8 washing tanks. The washing temperature is 48℃. 7g / L of soda ash is added to the first washing tank. The machine speed is 55m / min and the pH value of the fabric is 6.5.

[0067] The additives and dosages used in the tenter frame setting process are as follows: acid-base stabilizer PH-X 2.5g / L; the width expansion is the finished width + 5cm.

[0068] Pre-shrinkage speed 55m / min, fabric moisture content 5.5%, compression distance 7mm.

[0069] Comparative Example 1 The difference from Example 1 is that in step (1), the yarn raw material selection is as follows: the warp yarn is CVC40 English count yarn, and the yarn contains 80 wt.% cotton fiber and 20 wt.% polyester fiber.

[0070] Comparative Example 2 The difference from Example 1 is that in step (2), the dyeing process uses conventional package yarn dyeing.

[0071] Comparative Example 3 The difference from Example 1 is that in step (1), the yarn raw material selection is: all weft yarns are made of bicomponent elastic polyester spun from PTT and PET composite yarns.

[0072] Comparative Example 4 The difference from Example 1 is that in step (1), the yarn material selection is: all weft yarns are made of polyester with a cross-section.

[0073] Comparative Example 5 The difference from Example 1 is that in step (4), the rotary screen printing uses a C6 waterproofing agent instead of a fluorine-free paste.

[0074] Comparative Example 6 The difference from Example 1 is that in step (1), the yarn raw material selection is as follows: the warp yarn is CVC40 English count yarn, the cotton fiber content in the yarn is 80wt.% and the polyester fiber content is 20wt.%; in step (4), after the mercerizing process, a resin finishing and baking process is added, the resin dosage is 80g / L, the baking temperature is 150℃, and the baking time is 3min.

[0075] The fabrics prepared in Examples 1-4 and Comparative Examples 1-6 were subjected to performance tests, and the test methods are as follows: Elastic elongation was tested in accordance with ASTM D3107-07 (2019) "Standard Test Method for Tensile Properties of Fabrics Braided from Draw Yarns"; Wrinkle resistance was tested in accordance with AATCC TM124-2018te "Appearance smoothness of fabrics after multiple household washes"; Formaldehyde content was tested according to section 8.1.4 B of JIS L1041-2011 "Test Methods for Resin-Processed Textiles"; Water absorption was tested according to AATCC TM79-2025 "Textiles - Test Method for Water Absorption". Water resistance was tested according to AATCC TM22-2017e, "Water repellency of textiles: spray test".

[0076] The performance test results of the fabrics prepared in Examples 1-4 and Comparative Examples 1-6 are shown in Table 1: Table 1 Performance test results of the fabrics prepared in Examples 1-4 and Comparative Examples 1-6

[0077] As can be seen from the data in Table 1, the fabrics prepared by this invention have a wrinkle resistance of 3.2 or higher, are formaldehyde-free, and have a weft elastic elongation of over 12%, making them comfortable and not tight to wear. The front spray waterproof rating is over 80 points, demonstrating excellent waterproofing. The skin-friendly side absorbs water in less than 60 seconds, absorbing moisture and dissipating heat quickly, resulting in comfortable wear without a stuffy feeling. Furthermore, combined with… Figure 1-3 It can also be seen that when water is dripped on the front of the fabric, it is waterproof; when water is dripped on the back of the fabric, the water is absorbed by the back and does not penetrate to the front, proving that the back is absorbent.

[0078] In Comparative Example 1, the warp yarn used was a conventional CVC40 English count blended yarn, and the fabric had a wrinkle resistance grade of 2.8, which was slightly poor. In Example 1, the outer layer of the warp yarn was cotton fiber, and the inner layer was 30D polyester filament, which could provide support. The fabric had natural wrinkle resistance, with a wrinkle resistance grade of 3.2, and was easy to care for.

[0079] In Comparative Example 2, conventional packaged yarn dyeing was used. The yarn shrank due to heat during the dyeing process. Due to the influence of the dyeing package, the fabric was subjected to a certain external force, which limited the shrinkage. The yarn elasticity was low, and the weft elasticity of the fabric was 10.5%. In Example 1, tension-free star cage dyeing was used. The yarn shrank sufficiently due to heat during dyeing. The yarn elasticity was high, and the weft elasticity of the fabric was more than 20% higher than that of Comparative Example 2.

[0080] In Comparative Example 3, all weft yarns were made of bicomponent elastic polyester spun from PTT and PET composite yarns, with circular cross sections. This resulted in poor absorption and diffusion of moisture, and the fabric had a water absorption rate of 82s. In Example 1, the weft yarns consisted of a cross-shaped polyester yarn and a bicomponent elastic polyester yarn spun from PTT and PET composite yarns, arranged in a cross pattern. The cross-shaped polyester yarn facilitated moisture diffusion on the reverse side, and the fabric had a reverse water absorption rate of 55s.

[0081] In Comparative Example 4, all weft yarns are made of irregularly shaped polyester with a cross-section, which absorbs and diffuses moisture quickly. However, the yarn itself is not elastic and only generates mechanical elasticity through width contraction. The fabric has a weft elastic elongation of 6%, and movement is restricted. In Example 1, the weft yarn is made of a cross-shaped polyester and a bicomponent elastic polyester made of PTT and PET composite spinning. The bicomponent elastic polyester made of PTT and PET composite spinning gives the fabric elasticity and comfort. The fabric has a weft elastic elongation of 13.5%, and movement is unrestricted.

[0082] In Comparative Example 5, the rotary screen printing used a C6 waterproofing agent instead of a fluorine-free paste, resulting in a potential PFHxS risk in the finished fabric. In Example 1, a fluorine-free paste was used, and the waterproofness of the front side and the water absorption of the back side of the finished fabric were basically the same as those in Comparative Example 5, meeting the requirements of fluorine-free finishing in Europe, America, and Japan, and being environmentally friendly and healthy.

[0083] In Comparative Example 6, the warp yarn used was conventional CVC40 English count yarn. The finishing process, which was wrinkle-free, gave the fabric a certain degree of wrinkle resistance. The finished fabric had a formaldehyde content of 45ppm, which posed a risk of irritating the respiratory tract and also had a certain impact on the fabric's water absorption.

Claims

1. A method for preparing a tension-free dyed environmentally friendly ultra-repellent sweat-resistant yarn-dyed fabric, comprising fabric structure design → dyeing → weaving → finishing processes, characterized in that, (1) Fabric structure design: The outer layer of the warp yarn is made of cotton fiber, and the middle is made of polyester with a core fineness of 20~30D; the weft yarn is made of a cross-arranged polyester with a shaped cross section and a bicomponent elastic polyester; the weave structure is a twill weave with visible warp yarns. (2) Dyeing: Tensionless star cage dyeing equipment is used to dye the warp yarns with reactive dyes and the weft yarns with disperse dyes, followed by washing, softening and drying; (3) Weaving: The dyed warp yarns are slit and sized, and then woven according to the fabric structure designed in step (1) to obtain the yarn-dyed fabric. (4) Finishing: The yarn-dyed fabric obtained in step (3) is singed, desized, mercerized, printed on a circular screen, set at high temperature, washed, stretched and set, and pre-shrinked to obtain a tension-free dyed environmentally friendly ultra-swet-resistant yarn-dyed fabric. In step (4), the rotary screen printing process uses a fluorine-free paste, which includes waterproofing agent TF-501M 100~150g / L, crosslinking agent TF-569P 10~20g / L, thickener FN01 60~80g / L, and anti-penetration agent FS-30 10~20g / L.

2. The preparation method of the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (1), the warp yarn count is 30-50 English count, the outer layer of the warp yarn contains 80-85 wt.% cotton fiber, and the middle polyester core contains 15-20 wt.% polyester fiber. The yarn is obtained by blending and core-spun yarn. The weft yarn count is 75-150D, the profiled polyester has a cross-section, and the bicomponent elastic polyester is made of PTT and PET composite spinning. The weave structure is 2 / 2 twill, 2 / 1 twill, 3 / 3 twill or 3 / 1 twill.

3. The preparation method of the tension-free dyeing environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (2), the warp and weft yarns are wound into tension-free yarn bundles, and then the tension-free yarn bundles are filled layer by layer into the star cage. After filling, the star cage yarn frame is obtained. The yarn density inside the star cage is controlled to be 0.28~0.32g / cm by a tension-free yarn bundle pressing machine. 3 After the tension-free yarn bundles inside the star cage are compacted and fixed by a pressing and sealing device, they are transferred to the main cylinder of the dyeing machine of the star cage dyeing device. After sealing the equipment, the working liquid circulation method is used for processing.

4. The method for preparing the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (4), singeing is performed using a forward and reverse singeing method, with a speed of 80~100m / min, a flame intensity of 8~12mbar, and the burner position is cut-burning; desizing is performed using high-temperature enzyme desizing, adding 2~5g / L of degreasing agent TF109H, steaming at 95~98℃ for 20~30min, then washing with water at 85~95℃ for 5~10min, then washing with water at 40~50℃ for 3~5min, and then drying in a drying drum.

5. The preparation method of the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (4), the alkali concentration of the mercerizing process is 15~20 Baume degrees, the machine speed is 25~40m / min, the alkali temperature is 15~30℃, the water washing tank temperature is 60~80℃, and the fabric pH value is 5~7.

6. The method for preparing the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (4), during the rotary screen printing process, the SP nickel screen mesh count is 105~155, the magnetic rod is 10~16mm, the magnetic force is 50~80%, the machine speed is 30~45m / min, and the viscosity of the fluorine-free paste is controlled at 28000~35000cp.

7. The method for preparing the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (4), high-temperature setting is performed on the tenter frame, and the width is expanded to the finished width + 5~8cm. The oven temperature is 150~160℃ and the machine speed is 40~50m / min.

8. The method for preparing the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (4), the washing is carried out on a washing machine with 8 washing tanks. The washing temperature is 40~60℃. Add 5~10g / L of soda ash to the first washing tank. The machine speed is 40~60m / min. The pH value of the fabric is 5~7. The auxiliary agents and dosage used in the stretching and setting process are: acid-base stabilizer PH-X 1~3g / L; the width is the finished width + 4~6cm.

9. The method for preparing the tension-free dyed environmentally friendly ultra-hygroscopic sweat-resistant yarn-dyed fabric as described in claim 1, characterized in that, In step (4), the pre-shrinking speed is 50~70m / min, the cloth moisture content is 4~6%, and the pressing distance is 4~8mm.

10. Tension-free dyeing environmentally friendly ultra-repellent sweat-resistant yarn-dyed fabric, characterized in that... The fabric is prepared by the method for preparing tension-free dyeing environmentally friendly ultra-hygroscopic sweat stain yarn-dyed fabric as described in any one of claims 1-9.

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