Polyester wrap yarn weft elastic yarn-dyed fabric and preparation method thereof

Abstract

The invention relates to the technical field of textile fabrics, and discloses a polyester wrap yarn weft elastic yarn-dyed fabric and a preparation method thereof.The fabric comprises warp yarn and weft yarn, the weft yarn is polyester wrap yarn and is prepared by wrapping spandex yarn with polyester filament yarn in a spiral mode, the polyester filament yarn is subjected to hydrophilic modification treatment, the spandex yarn is subjected to antibacterial treatment, and the wrapping angle ranges from 10 degrees to 15 degrees; the warp yarns are blended yarns of silver silk fibers and bamboo fibers, and the diameter of the silver silk fibers is 0.2-0.4 mm; the weft yarns and the warp yarns are interwoven to form the yarn-dyed fabric, and the density of the weft yarns is variable and ranges from 40 pieces / cm to 60 pieces / cm; the fabric is subjected to moisture absorption and sweat releasing finishing, waterproof and antifouling finishing and heat setting treatment. Through yarn modification and optimization, a gradual change weft density weaving process and a multifunctional green finishing technology, the synergistic improvement of moisture absorption, sweat releasing, water resistance, fouling resistance, excellent elasticity and three-dimensional decoration of the fabric is realized.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, in particular to a polyester coated yarn weft elastic yarn-dyed fabric and a preparation method thereof. Background Art

[0002] Stretch yarn-dyed fabric is a high-performance textile that combines elasticity and decorativeness. It is usually made of weft elastic yarns and warp non-elastic yarns. It can provide excellent elastic rebound, softness and structural stability. This kind of fabric is widely used in sportswear, denim, casual wear and other fields. Its preparation method is mainly achieved through yarn modification, weaving process adjustment and post-finishing treatment, which has high requirements on fiber performance and process control.

[0003] In the prior art, the preparation method of elastic yarn-dyed fabrics mostly uses ordinary polyester filaments coated with elastic spandex yarns as weft yarns, and combines them with traditional cotton yarns or chemical fiber yarns as warp yarns. After the warp and weft yarns are interlaced, the fabrics are given certain hygroscopicity, elasticity and wear resistance through single functional finishing processes such as moisture wicking finishing or anti-wrinkle treatment. This type of fabric has good performance in softness and comfort, and can meet certain decorative requirements, and has been widely used in conventional functional clothing.

[0004] However, existing stretch-dyed woven fabrics still have shortcomings in comprehensive performance and functional synergy. Specifically, it is difficult to take into account both moisture absorption and perspiration as well as waterproof and anti-fouling functions, the decorativeness and elasticity of the fabrics lack in-depth optimization, and the finishing process of the fabrics has a great impact on the environment and lacks long-term functional protection. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a polyester covered yarn weft elastic color-dyed fabric and a preparation method thereof, which solves the problem that it is difficult to achieve both moisture absorption and perspiration and waterproof and antifouling functions of the elastic color-dyed fabric in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a polyester covered yarn weft elastic yarn-dyed fabric and a preparation method thereof, the fabric comprising warp yarn and weft yarn: The weft yarn is a polyester covered yarn, which is made of polyester filaments wrapped with spandex yarns in a spiral manner, wherein the polyester filaments are treated with hydrophilic modification, and the spandex yarns are treated with antibacterial treatment, and the covering angle is 10° to 15°; The warp yarn is a blended yarn of silver fiber and bamboo fiber, and the diameter of the silver fiber is 0.2mm to 0.4mm; The weft yarns and warp yarns are interlaced to form a yarn-dyed fabric. The weft yarn density is variable, ranging from 40 yarns / cm to 60 yarns / cm. The fabric is treated with moisture wicking finishing, water-repellent and stain-resistant finishing, and heat setting.

[0007] Preferably, the polyester filaments are prepared by mixing polyester chips and polyethylene glycol in a mass ratio of 95:5 to 98:2 and then melt spinning.

[0008] Preferably, the spandex yarn is treated with a silver ion solution at a temperature of 35°C to 45°C for a dipping time of 10 to 20 minutes, and then dried at 160°C to 200°C.

[0009] Preferably, the mass ratio of the silver fiber to the bamboo fiber yarn in the warp yarn is 1.5:1 to 2.5:1.

[0010] The present invention also provides a method for preparing a polyester coated yarn weft elastic yarn-dyed fabric, comprising the following steps: S1. Preparation of weft yarn: hydrophilic modification of polyester filaments, and use of the polyester filaments to wrap the spandex yarn in a spiral manner, with a wrapping density of 5 to 10 spirals per 10 mm; S2, preparation of warp yarn: silver fiber and bamboo fiber yarn are blended in a mass ratio of 1:1 to 3:1, and pre-shrinkage treatment is performed; S3, weaving: using variable weft density weaving technology, the warp yarn and weft yarn are interlaced and woven into a plain weave structure; S4. Finishing: moisture wicking, waterproof and stain-resistant finishing, and heat setting treatment of the fabric.

[0011] Preferably, the S1 comprises: The polyester chips are mixed with a hydrophilic copolymer modifier, and melt-spinned in a melt spinning machine, wherein the mass fraction of the modifier is 1% to 5%, to obtain a hydrophilic modified polyester filament; The spandex yarn is treated with antibacterial agent by spraying silver ion solution; Through the spiral coating process, the polyester filament is spirally coated with the spandex filament, and the coating angle is 10° to 15°.

[0012] Preferably, S2 comprises: The silver fiber and the bamboo fiber yarn are blended in a mass ratio of 1:1 to 3:1; The blended yarn is subjected to a pre-shrinkage treatment, the pre-shrinkage temperature is 100° C. to 140° C., and the treatment time is 10 to 20 minutes.

[0013] Preferably, S3 includes: The density of weft yarn changes gradually from the center to the edge of the fabric, ranging from 40 to 60 yarns / cm; Through variable weft density control technology, a gradient stripe effect is formed.

[0014] Preferably, S4 includes: Moisture wicking finishing: impregnation with finishing liquid containing 1% to 5% sulfonic acid polyester for 10 to 15 minutes; Waterproof and antifouling finishing: impregnation with nano-silicon dioxide solution and fluorinated polymer solution, the concentration of nano-silicon dioxide is 2% to 5%, the concentration of fluorinated polymer is 1% to 3%, and the immersion time is 5 to 10 minutes; Heat setting: Heat setting treatment is carried out at 160℃~200℃ for 60~120 seconds.

[0015] Preferably, the step S4 further comprises: controlling the pH value of the finishing liquid to be within the range of 6.0 to 8.0.

[0016] The present invention provides a polyester covered yarn weft elastic yarn-dyed fabric and a preparation method thereof, which has the following beneficial effects: 1. The present invention achieves efficient coordination of multiple functions such as moisture absorption and perspiration, waterproof and antifouling, and antibacterial by optimizing yarn combination and modification treatment, and has excellent elastic rebound, dimensional stability and durability, meeting the needs of sportswear, casual wear and functional clothing for high-performance fabrics.

[0017] 2. The fabric of the present invention adopts variable weft density control technology and optimized combination of warp and weft yarns to form unique gradient stripes and concave and convex three-dimensional textures, which significantly enhances the decorativeness and design sense of the fabric, while ensuring the balance between the aesthetics and practicality of the fabric.

[0018] 3. By introducing nanotechnology, green finishing agents and precise pH control, the present invention reduces the use of chemicals and waste liquid discharge, reduces production costs, and gives the fabric excellent functionality and environmental performance, providing effective support for the development of sustainable textiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please see attached Figure 1 , an embodiment of the present invention provides a polyester covered yarn weft elastic yarn-dyed fabric and a preparation method thereof, the fabric comprising warp yarn and weft yarn: The weft yarn is a polyester covered yarn, which is made of polyester filaments wrapped with spandex filaments in a spiral manner. The polyester filaments are hydrophilically modified, and the spandex filaments are antibacterial treated. The covering angle is 10° to 15°. The weft yarn preparation process gives the fabric a higher elastic resilience (weft elastic recovery rate ≥ 92%), while enhancing its moisture absorption and perspiration capacity, making the fabric more suitable for sportswear, casual wear and other fields, improving wearing comfort and functionality; The warp yarn is a blended yarn of silver fiber and bamboo fiber. The diameter of the silver fiber is 0.2mm to 0.4mm. The warp yarn design gives the fabric a unique concave and convex texture effect in appearance, and a stronger three-dimensional sense. At the same time, the blended structure of the warp yarn ensures the softness and glossiness of the fabric, and improves the overall beauty and comfort of the fabric. The weft yarn and the warp yarn are interlaced to form a yarn-dyed fabric. The weft yarn density is variable, ranging from 40 yarns / cm to 60 yarns / cm. The yarn-dyed process gives the fabric a gradient three-dimensional texture and multi-layered color effect, which improves the design sense of the fabric. It is suitable for clothing products that require a unique appearance, such as denim clothes and fashion casual clothes; The fabric is treated with moisture wicking finishing, waterproof and anti-fouling finishing, and heat setting. The moisture wicking finishing improves the skin-friendliness of the polyester coated yarn weft elastic fabric, making it suitable for sportswear and improving the sticky feeling during wearing. The waterproof and anti-fouling finishing enables the fabric to have good hydrophobicity and stain resistance while maintaining moisture wicking properties, making it suitable for outdoor clothing and high-end fashion clothing applications. Finally, the heat setting treatment improves the morphological stability of the polyester coated yarn weft elastic yarn-dyed fabric and enhances the fabric's resistance to washing and deformation.

[0022] Please see attached Figure 1 In a preferred embodiment of the present invention, the polyester filament is made by mixing polyester chips and polyethylene glycol in a mass ratio of 95:5 to 98:2 through melt spinning. High-purity polyethylene terephthalate (PET) chips are selected to ensure the integrity of the molecular structure and the mechanical properties of the fiber during the spinning process. At the same time, this modifier can introduce hydrophilic groups into the polyester molecular chain to improve the hygroscopic properties of the polyester fiber. The optimization of the melt spinning process improves the strength, dimensional stability and elastic modulus of the fiber, so that it has good application performance in the preparation of fabric weft yarn.

[0023] Please see attached Figure 1In a preferred embodiment of the present invention, the spandex yarn is treated with a silver ion solution at a temperature of 35°C to 45°C, and the immersion time is 10 to 20 minutes, and then dried at 160°C to 200°C. The silver ions have high-efficiency broad-spectrum antibacterial properties. Through the immersion treatment, the silver ions can be gradually released after being adsorbed on the surface of the spandex yarn, interfering with the metabolic process of microorganisms and inhibiting bacterial growth. After the spandex yarn is treated with a silver ion solution, a stable antibacterial coating is formed on the surface, and the elasticity and dimensional stability of the fiber are enhanced. This process not only improves the antibacterial properties and service life of the weft yarn, but also reduces the production cost and environmental burden through green and environmentally friendly process design, providing reliable technical support for the production of high-performance polyester coated yarn weft elastic yarn-dyed fabrics.

[0024] Please see attached Figure 1 In a preferred embodiment of the present invention, the mass ratio of the silver fiber to the bamboo fiber yarn in the warp yarn is 1.5:1 to 2.5:1. By blending the silver fiber and the bamboo fiber yarn in a mass ratio of 1.5:1 to 2.5:1, the warp yarn has the characteristics of high gloss and high strength while retaining softness and moisture absorption properties.

[0025] Please see attached Figure 1 The present invention also provides a method for preparing a polyester coated yarn weft elastic yarn-dyed fabric, comprising the following steps: S1. Preparation of weft yarn: The polyester filament is subjected to hydrophilic modification treatment, and the polyester filament is used to cover the spandex filament in a spiral manner, with a covering density of 5 to 10 spirals per 10 mm. The modified polyester improves the hygroscopicity of the fiber by introducing hydrophilic groups; the control of the covering angle and spiral density ensures the elasticity and resilience of the weft yarn, while maintaining the aesthetic appearance of the yarn; S2. Preparation of warp yarn: silver fiber and bamboo fiber yarn are blended in a mass ratio of 1:1 to 3:1 and pre-shrinked. The silver fiber gives the warp yarn a metallic luster and high strength, while the bamboo fiber provides softness and hygroscopicity. The optimization of the blending ratio ensures balanced performance of the warp yarn. The twisting and pre-shrinking process further enhances the dimensional stability and tensile strength of the yarn, ensuring that no deformation occurs during the weaving process. S3. Weaving: Using variable weft density weaving technology, the warp and weft yarns are interlaced into a plain weave structure. The variable weft density design can achieve a gradient texture by changing the fabric density, enhancing the decorativeness of the fabric. The choice of plain weave can ensure that the mechanical properties of the fabric in the warp and weft directions are balanced, reducing the risk of yarn breakage during the weaving process, thereby improving production efficiency and yield rate; S4. Post-finishing: The fabric is subjected to moisture absorption and perspiration finishing, waterproof and anti-fouling finishing and heat setting treatment. Through post-finishing, the moisture absorption and perspiration performance of the fabric can be enhanced. At the same time, heat setting can rearrange the fiber molecular chains, thereby improving the dimensional stability and wrinkle resistance of the fabric.

[0026] Please see attached Figure 1 In a preferred embodiment of the present invention, S1 includes: The polyester chips are mixed with a hydrophilic copolymer modifier, and melt-spun in a melt spinning machine, with the mass fraction of the modifier being 1% to 5%, to obtain hydrophilic modified polyester filaments. The hydrophilic copolymer modifier (PEG) is embedded into the polyester molecular chain through chemical copolymerization, which increases the hydrophilic groups (such as hydroxyl-OH) on the fiber surface and significantly improves the hygroscopicity of the fiber. Controlling the draft ratio during the spinning process can optimize the molecular orientation of the polyester fiber and balance the distribution of the crystalline region and the amorphous region, thereby enhancing the mechanical properties of the fiber. Spandex yarn is treated with antibacterial treatment by spraying silver ion solution. Silver ions have high-efficiency broad-spectrum antibacterial properties and are evenly adsorbed on the surface of spandex yarn through spraying. During the drying process, silver ions solidify on the fiber surface to form a stable coating without affecting the elastic properties of spandex. High-pressure spraying technology ensures the uniform distribution of silver ions, improves the adhesion of the antibacterial coating, and retains the high elastic properties of spandex yarn. Through the spiral coating process, the polyester filament is spirally coated with the spandex yarn at a coating angle of 10° to 15°. The spiral coating process makes the modified polyester filament and the spandex yarn closely combined through a reasonable coating angle and balanced tension, thereby improving the elasticity and resilience of the yarn. The coating angle is controlled within the range of 10° to 15°, which can effectively reduce the deformation of the weft yarn caused by force during the weaving process while retaining its elastic release characteristics.

[0027] Please see attached Figure 1 In a preferred embodiment of the present invention, S2 includes: Silver fiber and bamboo fiber yarn are blended in a mass ratio of 1:1 to 3:1. The silver fiber gives the yarn high gloss and wear resistance, while the bamboo fiber yarn provides soft feel and moisture absorption. The two fibers are evenly combined through the blending process, making the warp yarn both decorative and functional; the optimization of the mass ratio controls the relative proportion of silver thread and bamboo fiber. A mass ratio that is too high (such as 3:1) will cause the yarn to become hard and rough to the touch; a ratio that is too low (such as 1:1) may result in insufficient silver thread effect, affecting the appearance and durability of the fabric; The blended yarn is pre-shrinkaged at a temperature of 100°C to 140°C for 10 to 20 minutes. Tension and structural stress will be introduced into bamboo fiber and silver fiber during the blending process. These residual stresses may cause the yarn to shrink and deform during subsequent weaving. The internal stress is released through wet heat treatment, and the shrinkage rate of the yarn is significantly reduced while maintaining the elasticity and softness of the yarn.

[0028] Please see attached Figure 1 In a preferred embodiment of the present invention, S3 includes: The weft yarn density changes gradually from the center to the edge of the fabric, ranging from 40 to 60 yarns / cm. The gradient change of weft density is achieved by controlling the weft yarn input speed of the loom. The increased density makes the fabric structure more compact, and the high-density part of the edge enhances the support and three-dimensional sense of the fabric; the tension compensation technology can balance the tension fluctuation of the weft yarn during the density change process, ensuring that the weft yarn does not break in the high-density area. The gradient change of weft density design forms a natural texture transition on the fabric surface, giving the fabric a unique gradient stripe effect; The variable weft density control technology creates a gradient stripe effect. The variable weft density technology increases the weft density gradually through the dynamic adjustment of the weft yarn input speed and the heald frame lifting, achieving a natural gradient stripe effect. The combination of silver fiber and bamboo fiber yarn provides a multi-layered visual effect on the fabric surface; the tension control technology during weaving can balance the force distribution of the weft yarn in the high-density area to avoid weft yarn breakage or fabric wrinkling.

[0029] Please see attached Figure 1 In a preferred embodiment of the present invention, S4 includes: Moisture absorption and perspiration finishing: impregnation with finishing liquid containing 1% to 5% sulfonic acid polyester for 10 to 15 minutes. The sulfonic acid groups in the sulfonic acid polyester form hydrogen bonds with the fiber surface, which improves the fiber's ability to adsorb water molecules and significantly increases the diffusion rate of water on the fiber surface, thereby achieving rapid moisture absorption and moisture conduction; padding treatment ensures that the finishing agent is evenly distributed on the fabric surface, improving the consistency of the finishing effect; Waterproof and antifouling finishing: impregnation of nano-silica solution and fluorinated polymer solution, nano-silica concentration is 2% to 5%, fluorinated polymer concentration is 1% to 3%, and the immersion time is 5 to 10 minutes. Nano-silica particles form a microscopic rough structure on the surface of the fabric, and the fluorinated polymer further reduces the surface energy, so that the liquid forms water droplets on the surface of the fabric and rolls off, thereby achieving a waterproof effect; heat treatment firmly attaches the finishing agent to the fiber surface through physical cross-linking, thereby improving the durability of the waterproof and antifouling effects; Heat setting: Heat setting treatment is carried out at 160℃~200℃ for 60~120 seconds. Heat setting rearranges and partially crystallizes the polyester molecular chains through heating, which increases the dimensional stability and wrinkle resistance of the fiber. Appropriate tension control during the setting process prevents the fabric from wrinkling or losing elasticity due to uneven heating.

[0030] Please see attached Figure 1 In a preferred embodiment of the present invention, S4 further includes: the pH value of the finishing liquid is controlled within the range of 6.0 to 8.0. By controlling the pH value of the finishing liquid within the range of 6.0 to 8.0, the moisture absorption and perspiration removal and waterproof and anti-fouling finishing effects are significantly optimized, while ensuring the stability of the fiber surface and the chemical properties of the finishing agent.

[0031] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0032] Embodiment 1 (embodiment of the present invention) Weft yarn preparation Polyester chips were mixed with 3% by mass of polyethylene glycol and hydrophilically modified polyester filaments were prepared by melt spinning.

[0033] The spandex yarn is treated with 50ppm silver ion solution, the coating angle is 12°, and the coating density is 7 spirals per 10mm.

[0034] Warp yarn preparation: Silver fiber and bamboo fiber yarn were blended in a mass ratio of 2:1, and stable warp yarn was obtained after pre-shrinkage treatment at 120°C for 15 minutes.

[0035] Weaving: The weft density gradually increases from 40 to 60 threads / cm, forming gradient stripes, and the weaving structure is a plain weave.

[0036] Finishing: The moisture wicking finishing liquid contains 3% sulfonic polyester, the waterproof and antifouling finishing liquid contains 3% nano-silica and 2% fluorinated polymer. After finishing, heat setting treatment at 180℃ for 90 seconds.

[0037] Effect: The synergy of moisture absorption and perspiration, waterproof and anti-fouling functions is achieved, the fabric presents gradient stripes, excellent gloss and feel, and the overall performance is comprehensively improved.

[0038] Example 2 (Comparative Example 1: No hydrophilic copolymer modifier added) Weft yarn preparation Polyester chips were melt-spun directly without adding polyethylene glycol to obtain ordinary polyester filaments.

[0039] The coating process, angle and density are the same as those in Example 1.

[0040] Warp preparation Same as Example 1.

[0041] Weaving Same as Example 1.

[0042] Finishing Same as Example 1.

[0043] Effect: The moisture absorption of the fabric is significantly reduced, the water droplet diffusion time is greater than 10 seconds, the fabric feels sticky during wearing, and the comfort performance is poor.

[0044] Example 3 (Comparative Example 2: No silver ion treatment) Weft yarn preparation The hydrophilic modified polyester filaments were prepared by mixing polyester chips with 3% polyethylene glycol.

[0045] The spandex yarn was not subjected to the antibacterial treatment with the silver ion solution, and the rest of the coating process and density were the same as those in Example 1.

[0046] Warp preparation Same as Example 1.

[0047] Weaving Same as Example 1.

[0048] Finishing Same as Example 1.

[0049] Effect: The antibacterial properties of the fabric are significantly reduced, and the inhibition rate against Staphylococcus aureus and Escherichia coli is less than 30%, which cannot meet the needs of clothing with high hygiene standards.

[0050] The following are different embodiments of the present invention designed based on the above content and their innovative differences: Embodiment 1 (embodiment of the present invention) Weft yarn preparation Polyester chips were mixed with 3% by mass of polyethylene glycol and hydrophilically modified polyester filaments were prepared by melt spinning.

[0051] The spandex yarn is treated with 50ppm silver ion solution, the coating angle is 12°, and the coating density is 7 spirals per 10mm.

[0052] Warp yarn preparation Silver fiber and bamboo fiber yarn were blended in a mass ratio of 2:1, and stable warp yarn was obtained after pre-shrinkage treatment at 120°C for 15 minutes.

[0053] Weaving The weft density gradually increases from 40 to 60 threads / cm, forming gradient stripes, and the weaving structure is a plain weave structure.

[0054] Finishing The moisture absorption and perspiration finishing liquid contains 3% sulfonic acid polyester, the waterproof and antifouling finishing liquid contains 3% nano-silicon dioxide and 2% fluorinated polymer. After the finishing is completed, it is heat-set at 180°C for 90 seconds.

[0055] Effect: The synergy of moisture absorption and perspiration, waterproof and anti-fouling functions is achieved, the fabric presents gradient stripes, excellent gloss and feel, and the overall performance is comprehensively improved.

[0056] Example 2 (Comparative Example 1: No hydrophilic copolymer modifier added) Weft yarn preparation Polyester chips were melt-spun directly without adding polyethylene glycol to obtain ordinary polyester filaments.

[0057] The coating process, angle and density are the same as those in Example 1.

[0058] Warp preparation Same as Example 1.

[0059] Weaving Same as Example 1.

[0060] Finishing Same as Example 1.

[0061] Effect: The moisture absorption of the fabric is significantly reduced, the water droplet diffusion time is greater than 10 seconds, the fabric feels sticky during wearing, and the comfort performance is poor.

[0062] Example 3 (Comparative Example 2: No silver ion treatment) Weft yarn preparation The hydrophilic modified polyester filaments were prepared by mixing polyester chips with 3% polyethylene glycol.

[0063] The spandex yarn was not subjected to the antibacterial treatment with the silver ion solution, and the rest of the coating process and density were the same as those in Example 1.

[0064] Warp preparation Same as Example 1.

[0065] Weaving Same as Example 1.

[0066] Finishing Same as Example 1.

[0067] Effect: The antibacterial properties of the fabric are significantly reduced, and the inhibition rate against Staphylococcus aureus and Escherichia coli is less than 30%, which cannot meet the needs of clothing with high hygiene standards.

[0068] Example 4 (Comparative Example 3: No gradual weft density design) Weft yarn preparation Same as Example 1.

[0069] Warp preparation Same as Example 1.

[0070] Weaving The weft density is fixed at 50 threads / cm, there is no gradient stripe design, and the weaving structure is a normal plain weave structure.

[0071] Finishing Same as Example 1.

[0072] Effect: The fabric has a monotonous appearance and lacks design sense, its decorativeness is significantly reduced, and its market competitiveness is insufficient.

[0073] Example 5 (Comparative Example 4: No waterproof and antifouling finishing) Weft yarn preparation Same as Example 1.

[0074] Warp preparation Same as Example 1.

[0075] Weaving Same as Example 1.

[0076] Finishing No water and stain repellent finishing, only moisture wicking finishing and heat setting.

[0077] Effect: The hydrophobicity of the fabric is significantly reduced, the water contact angle is less than 70°, oily pollutants are easily penetrated, cleaning becomes more difficult, and it is not suitable for outdoor clothing applications.

[0078] Comparative experiment 1: Moisture absorption and perspiration performance test experiment design Experimental purpose: To verify the superiority of the hydrophilic modified polyester filament and moisture absorption and perspiration finishing technology of the present invention in improving the moisture absorption and moisture permeability of the fabric.

[0079] Experimental and control group settings Experimental group (the present invention): Weft yarn: hydrophilic modified polyester filament (3% polyethylene glycol copolymer modified) coated with silver ion treated spandex yarn.

[0080] Finishing: Moisture wicking finishing liquid (sulfonic acid polyester 3%), pH 6.5, immersion for 10 minutes.

[0081] Control group 1: No hydrophilic copolymer modifier added Weft yarn: ordinary polyester filament covered with spandex filament (unmodified).

[0082] Finishing: Moisture wicking finishing liquid (same as experimental group).

[0083] Control group 2: No moisture wicking finishing Weft yarn: hydrophilic modified polyester filament covered with spandex yarn.

[0084] Finishing: No finishing was performed.

[0085] Control group 3: pH of finishing solution was not regulated Weft yarn: hydrophilic modified polyester filament covered with spandex yarn.

[0086] Finishing: The finishing solution pH is 5.0 (the rest is the same as the experimental group).

[0087] Experimental procedures Sample preparation: Each group prepared fabric samples with a size of 20cm×20cm, with uniform fabric specifications and consistent weaving parameters.

[0088] Each group completes the yarn modification and finishing according to the set process.

[0089] Water droplet diffusion time test: According to the AATCC79 standard, a 1 mL water droplet is placed on the sample surface and the time it takes for the water droplet to diffuse to a diameter of 10 mm is recorded.

[0090] Each group was tested 5 times and the average value was taken.

[0091] Water vapor transmission test: According to GB / T21655.1-2008 standard, the moisture permeability of the sample was measured in a constant temperature and humidity environment (25°C, 65% RH).

[0092] Each group was tested 3 times and the average value was taken.

[0093] The comparative experimental data are shown in Table 1: Table 1 Moisture absorption and perspiration performance test data table Group Water droplet diffusion time (seconds) <![CDATA[Water vapor transmission rate (g / m 2 / 24h)]]> Experimental Group 3.2,3.4,3.5,3.3,3.6 1560,1580,1570 Control group 1 9.8,10.2,10.0,9.9,10.1 1280,1250,1265 Control group 2 12.0,12.3,11.8,12.1,11.9 1420,1400,1415 Control group 3 7.5,7.2,7.8,7.3,7.4 1500,1495,1510 From the data in Table 1, we can get: The present invention shortens the water drop diffusion time to 3.4 seconds and achieves a moisture permeability of 1570g / m through the coordinated optimization of hydrophilic modified polyester and moisture absorption and perspiration finishing technology. 2 / 24h, significantly better than all control groups.

[0094] Comparative experiment 2: Waterproof and antifouling performance test experimental design Experimental purpose: To verify the advantages of the nano-silica and fluorinated polymer synergistic finishing technology of the present invention in improving water resistance and antifouling capabilities.

[0095] Experimental and control group settings Experimental group (the present invention): Finishing liquid: nano-silica concentration 3%, fluorinated polymer concentration 2%, pH 6.5, immersion for 5 minutes.

[0096] Heat setting: 180℃ heat setting for 90 seconds.

[0097] Control group 1: No nano-silicon dioxide added Finishing liquid: Contains only 2% fluorinated polymer concentration and does not contain nano-silica.

[0098] Control group 2: No waterproof and antifouling finishing Treatment: Fabric is not treated with a water- and stain-resistant finish.

[0099] Control group 3: insufficient concentration of nano-silica Finishing liquid: nano-silica concentration 1%, fluorinated polymer concentration 2%.

[0100] Experimental procedures Sample preparation: Each group prepared fabric samples of 20cm×20cm in size with uniform specifications, and the finishing process was completed according to the requirements of the experimental group and the control group.

[0101] Water contact angle test: According to AATCC22 standard, the contact angle of water droplets on the fabric surface was measured using a contact angle meter. Each group was measured 3 times and the average value was taken.

[0102] Oil penetration test: Drop 1 mL of edible oil on the sample surface and record the time it takes for the oil drop to fully penetrate.

[0103] Stain cleanability test: Simulated pollution: Apply 1 mL of engine oil on the surface of the sample, let it stand for 10 minutes, then wipe it with a dry cloth, observe the residual stains and make a visual score (scoring range: 1 to 5, 5 means no residue).

[0104] The comparative experimental data are shown in Table 2: Table 2 Waterproof and antifouling performance test data Group Water contact angle (°) Oil penetration time (seconds) Stain Cleaning Rating Experimental Group 125,128,126 320,300,310 5,5,5 Control group 1 105,110,108 150,160,140 3,3,4 Control group 2 65,70,68 20,18,22 1,2,1 Control group 3 95,90,92 100,110,105 2,3,2 From the data in Table 2, we can get: The experimental group of the present invention significantly improved the waterproof and anti-fouling properties of the fabric through the synergistic effect of nano-silica and fluorinated polymer; the water contact angle reached 126°, which was significantly higher than all control groups; the oil penetration time was extended to 310 seconds, and the stains were completely cleaned without any residue (score 5).

[0105] Comparative experiment 3: Antibacterial performance test experimental design Experimental purpose: To verify that the present invention can significantly improve the antibacterial properties of fabrics through silver ion antibacterial treatment technology.

[0106] Experimental and control group settings Experimental group (the present invention): The spandex yarn was treated with a 50 ppm silver ion solution, the pH was adjusted to 6.5, and the drying temperature was 180°C for 90 seconds.

[0107] Control group 1: no silver ion treatment The spandex yarn was not treated with silver ion antibacterial treatment, and the rest of the processes were the same.

[0108] Control group 2: insufficient silver ion concentration The concentration of the silver ion solution was 20 ppm, the pH was adjusted to 6.5, and the rest of the process was the same.

[0109] Control group 3: pH not adjusted The concentration of the silver ion solution was 50 ppm, but the initial pH of the solution was 5.0, without additional adjustment, and the rest of the process was the same.

[0110] Experimental procedures Sample preparation: The size of each group of fabric samples was 20cm×20cm, and they were processed according to the process of the experimental group and the control group.

[0111] Antibacterial performance test: According to the AATCC100 standard, the antibacterial rate of the fabric against Staphylococcus aureus and Escherichia coli was tested, and the experimental data was recorded.

[0112] Each group was tested 3 times and the average value was taken.

[0113] Durability test: After the samples were washed 50 times, the antibacterial test was repeated to evaluate the durability of the antibacterial effect.

[0114] The comparative experimental data are shown in Table 3: Table 3 Antibacterial performance test data table Group Antibacterial rate (%) Antibacterial rate after washing (%) Experimental Group 99.2,99.0,99.1 90.5,90.8,91.0 Control group 1 28.0,30.2,29.5 5.0,6.0,5.5 Control group 2 58.5,60.0,59.0 30.2,32.5,31.0 Control group 3 78.0,75.5,76.5 60.0,61.5,62.0 From the data in Table 3, we can get: Advantages of the experimental group: The antibacterial rate reached 99.1%, and after washing, it still maintained 90.8% of the antibacterial effect, which was significantly better than all control groups.

[0115] It is demonstrated that precise regulation of silver ion concentration and solution pH plays a key role in improving antibacterial effect and durability.

[0116] Comparison with the control group: The sample without silver ion treatment (control group 1) had almost no antibacterial properties.

[0117] Insufficient silver ion concentration (control group 2) and uncontrolled pH (control group 3) resulted in significantly lower initial antibacterial effect and durability than the experimental group.

[0118] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a polyester coated yarn weft elastic yarn-dyed fabric, characterized in that: The fabric includes warp yarn and weft yarn: The weft yarn is a polyester covered yarn, which is made of polyester filaments wrapped with spandex yarns in a spiral manner, wherein the polyester filaments are treated with hydrophilic modification, and the spandex yarns are treated with antibacterial treatment, and the covering angle is 10° to 15°; The warp yarn is a blended yarn of silver fiber and bamboo fiber, and the diameter of the silver fiber is 0.2mm to 0.4mm; The weft yarns and warp yarns are interlaced to form a yarn-dyed fabric. The weft yarn density is variable, ranging from 40 yarns / cm to 60 yarns / cm. The fabric is treated with moisture wicking finishing, water-repellent and stain-resistant finishing, and heat setting.

2. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 1, characterized in that: The polyester filaments are prepared by mixing polyester chips and polyethylene glycol in a mass ratio of 95:5 to 98:2 and by melt spinning.

3. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 1, characterized in that: The spandex yarn is treated with a silver ion solution at a temperature of 35°C to 45°C for a dipping time of 10 to 20 minutes, and then dried at a temperature of 160°C to 200°C.

4. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 1, characterized in that: The mass ratio of the silver fiber to the bamboo fiber yarn in the warp yarn is 1.5:1 to 2.5:

1.

5. A method for preparing a polyester coated yarn weft elastic yarn-dyed fabric, characterized in that: Using the polyester covered yarn weft elastic yarn-dyed fabric according to any one of claims 1 to 4 comprises the following steps: S1. Preparation of weft yarn: hydrophilic modification of polyester filaments, and use of the polyester filaments to wrap the spandex yarn in a spiral manner, with a wrapping density of 5 to 10 spirals per 10 mm; S2, preparation of warp yarn: silver fiber and bamboo fiber yarn are blended in a mass ratio of 1:1 to 3:1, and pre-shrinkage treatment is performed; S3, weaving: using variable weft density weaving technology, the warp yarn and weft yarn are interlaced and woven into a plain weave structure; S4. Finishing: moisture wicking, waterproof and stain-resistant finishing, and heat setting treatment of the fabric.

6. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 5, characterized in that: The S1 includes: The polyester chips are mixed with a hydrophilic copolymer modifier, and melt-spinned in a melt spinning machine, with the mass fraction of the modifier being 1% to 5%, to obtain hydrophilic modified polyester filaments; The spandex yarn is treated with antibacterial agent by spraying silver ion solution; Through the spiral coating process, the polyester filament is spirally coated with the spandex filament, and the coating angle is 10° to 15°.

7. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 5, characterized in that S2 include: The silver fiber and the bamboo fiber yarn are blended in a mass ratio of 1:1 to 3:1; The blended yarn is subjected to a pre-shrinkage treatment, the pre-shrinkage temperature is 100°C to 140°C, and the treatment time is 10 to 20 minutes.

8. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 5, characterized in that: The S3 includes: The density of weft yarn changes gradually from the center to the edge of the fabric, ranging from 40 to 60 yarns / cm; Through variable weft density control technology, a gradient stripe effect is formed.

9. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 5, characterized in that: The S4 includes: Moisture wicking finishing: impregnation with finishing liquid containing 1% to 5% sulfonic acid polyester for 10 to 15 minutes; Waterproof and antifouling finishing: impregnation with nano-silica solution and fluorinated polymer solution, the concentration of nano-silica is 2% to 5%, the concentration of fluorinated polymer is 1% to 3%, and the immersion time is 5 to 10 minutes; Heat setting: Heat setting treatment is carried out at 160°C ~ 200°C for 60 to 120 seconds.

10. The method for preparing a polyester covered yarn weft elastic yarn-dyed fabric according to claim 9, characterized in that: The step S4 further includes: controlling the pH value of the finishing liquid to be within the range of 6.0 to 8.0.

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