Lace fabric and preparation method thereof

Abstract

The invention discloses a lace fabric and a preparation method thereof, and relates to the technical field of fabric fibers. The preparation method of the lace fabric comprises the following steps: uniformly coating a layer of waterborne polyurethane adhesive on the lower surface of the breathable layer; overlapping the glued breathable layer and the supporting layer fabric, and pressing and bonding under the pressure through a hot pressing roller; and the lace is laid on the edges of the two sides of the compounded breathable layer, bonding and fixing are conducted through the low-temperature hot-melt adhesive tape, and then the fabric is obtained. The lace fabric prepared by the invention has excellent moisture absorption and air permeability.

Description

Technical Field

[0001] This invention relates to the field of fabric fiber technology, specifically to a lace trim fabric and its preparation method. Background Technology

[0002] Lace fabric, with its delicate patterns and lightweight texture, holds an irreplaceable position in clothing, home textiles, and lingerie, especially in women's lingerie where its penetration rate has reached 64%, making it a core material for enhancing product aesthetics and fashion sense. However, as consumers' demands for wearing comfort continue to rise, the moisture absorption and breathability deficiencies of existing lace fabrics are becoming increasingly prominent, posing a key technological bottleneck to the industry's development.

[0003] Currently, mainstream lace fabrics are mainly made of synthetic fibers such as nylon and polyester through warp knitting. Among them, multi-comb warp-knitted fabrics are widely used because they can form complex three-dimensional patterns. These synthetic fibers lack hydrophilic groups in their molecular structure, resulting in an equilibrium moisture absorption rate of typically less than 3% under standard temperature and humidity conditions. When the human body is at rest, the amount of water evaporated through the skin is approximately 15g / m² per hour. 2 During exercise, it can reach as high as 100g / m 2 However, the low moisture absorption of synthetic fibers makes it unable to effectively absorb and conduct sweat, which easily causes a sticky feeling on the wearer's skin. Summary of the Invention

[0004] The purpose of this invention is to provide a lace trim fabric and its preparation method to solve the technical problem of poor moisture absorption and breathability of lace trim fabric mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A lace trim fabric includes a support layer, a breathable layer, and lace trim located on both sides of the breathable layer, the breathable layer being woven from modified polyester fibers.

[0007] Preferably, the method for preparing the modified polyester fiber includes the following steps:

[0008] S1. Natural zeolite micro powder and jade nano powder are mixed and sprayed with a mixed solution of ethanol and deionized water containing KH-550 silane coupling agent. After reaction and sieving, activated composite mineral powder is obtained.

[0009] S2. The activated composite mineral powder is melt-blended and granulated with hydrophilic modified polyester chips to obtain mineral masterbatch; polystyrene is used as the island component and the mineral masterbatch is used as the sea component. The island-sea composite spinning is carried out and formed by a trilobal hollow spinneret. The island component is then dissolved in solvent, rinsed and dried to obtain mineral blended fiber with a hollow porous structure.

[0010] S3. Place the mineral blended fibers in a vacuum plasma treatment device and introduce a mixture of oxygen and carbon dioxide for plasma treatment to obtain plasma-treated fibers.

[0011] S4. Immerse the plasma-treated fiber in a solution containing acrylic acid, hydroxyethyl methacrylate and a water-soluble photoinitiator. After swelling, squeeze out the excess liquid and irradiate with ultraviolet light under a nitrogen atmosphere to initiate a graft copolymerization reaction. After removing the fiber, wash it with hot water to remove unreacted monomers and homopolymers, and then dry it to obtain the final product.

[0012] In this invention, natural zeolite and jade mineral powders are first incorporated into the fiber. Both possess excellent moisture adsorption properties and, after activation by a coupling agent, are uniformly dispersed in the polyester "sea" component, providing additional moisture absorption sites for the fiber. By using polystyrene as the "island" phase and subsequently dissolving it, numerous interconnected microporous channels are formed within the fiber. Simultaneously, a trilobal hollow spinneret imparts a durable hollow structure to the fiber. This composite form of hollow and porous structure generates a powerful capillary effect, actively and rapidly adsorbing liquid sweat and gaseous moisture from the skin surface and guiding them into the hollow cavities and channels within the fiber. The air stored within the hollow structure also significantly enhances the fiber's thermal insulation and breathability, allowing heat and moisture to dissipate efficiently through the fiber assembly, thereby achieving the fiber's breathability and active moisture wicking properties.

[0013] Then, the fiber surface was chemically modified through plasma etching and ultraviolet graft polymerization, increasing its hydrophilicity and enabling instantaneous water capture and rapid diffusion. Specifically, plasma treatment utilizes active plasma to bombard the fiber surface, etching micro- and nano-scale grooves and unevenness, significantly increasing the specific surface area and providing more adhesion points and expansion channels for water. Furthermore, it introduces a large number of hydrophilic polar groups and free radicals such as hydroxyl and carboxyl groups onto the surface, greatly enhancing surface energy. Acrylic acid and hydroxyethyl methacrylate monomers are grafted and copolymerized through these active sites under ultraviolet light initiation, grafting a superhydrophilic polymer brush network rich in carboxyl and hydroxyl groups onto the fiber surface and pore entrances. This polymer brush reduces the water contact angle to an extremely low level, allowing sweat to be instantly adsorbed and spread upon contact with the fiber surface, and rapidly guided to distant evaporation through the internal porous structure, avoiding localized dampness and a cold feeling. Figure 1 This is a SEM image of the surface of the modified polyester fiber of this invention. This synergistic effect between the surface and the physical structure enables the polyester fiber to have excellent moisture absorption and breathability.

[0014] Preferably, in step S1, the mass ratio of natural zeolite micro powder to jade nano powder is 6:2 to 4.

[0015] Preferably, in step S1, the reaction temperature is 80-85°C and the reaction time is 3-5 hours.

[0016] Preferably, in step S2, the mass ratio of hydrophilic modified polyester chips to activated composite mineral powder is 20:1 to 2.

[0017] Preferably, in step S2, the solvent used to dissolve the island components is dichloromethane.

[0018] Preferably, in step S3, the plasma treatment power is 200-300W and the plasma treatment time is 5-10min.

[0019] Preferably, in step S4, the plasma-treated fibers are pre-treated with polyethylene glycol methacrylate grafting.

[0020] In this invention, acrylic acid and hydroxyethyl methacrylate monomers are grafted onto the fiber surface to improve its hydrophilicity. However, the research team discovered through in-depth studies that the small molecular weight monomers of acrylic acid and hydroxyethyl methacrylate readily penetrate and react, clogging the internal pores and significantly impacting the fiber's moisture absorption and breathability. To further address this problem, this invention first uses the high molecular weight monomer polyethylene glycol methacrylate for pre-grafting, forming a loose hydrophilic network on the fiber surface and at the pore entrances. This prevents the small molecular weight monomers of acrylic acid and hydroxyethyl methacrylate from diffusing into the fiber's internal pores, allowing only a small, controllable amount to penetrate into the interior, achieving sparse hydrophilicity of the pore walls. This avoids the blockage of the fiber's internal porous structure caused by the small molecular weight monomers, thereby significantly improving the fiber's moisture absorption and breathability.

[0021] Preferably, in step S4, the mass ratio of acrylic acid to hydroxyethyl methacrylate is 6:3 to 5.

[0022] A method for preparing lace trim fabric includes the following steps:

[0023] 1) Apply a layer of water-based polyurethane adhesive evenly to the lower surface of the breathable layer;

[0024] 2) The breathable layer after applying the adhesive is stacked with the support layer fabric and then bonded by pressing with a hot roller under pressure.

[0025] 3) Lay the lace trim along both edges of the composite breathable layer and secure it with low-temperature hot melt adhesive strips to achieve the desired finish.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] By using activated natural zeolite and jade nanoparticles to provide moisture absorption sites, combined with island spinning and a trilobal hollow spinneret to construct a hollow porous structure to accelerate moisture conduction, and then plasma treatment and ultraviolet grafting to form a superhydrophilic surface, and by using polyethylene glycol methacrylate pre-grafting to avoid small molecule monomers clogging the pores, multiple methods work together to achieve rapid moisture adsorption, diffusion and evaporation, effectively solving the problem of poor moisture absorption and breathability of existing fabrics. Attached Figure Description

[0028] Figure 1 This is a SEM image of the surface of the modified polyester fiber of this invention. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] A lace trim fabric includes a support layer, a breathable layer, and lace trim located on both sides of the breathable layer, wherein the support layer is woven from cotton fibers and the breathable layer is woven from modified polyester fibers.

[0032] Preparation of modified polyester fibers:

[0033] Step 1: Weigh 180g of natural zeolite micro powder and 100g of jade nano powder, and premix them in a high-speed mixer for 30min; then dissolve 3.6g of KH-550 silane coupling agent in a 500mL mixture of ethanol and deionized water (volume ratio 9:1) for 15min and add it to the mineral powder in spray form under low speed stirring to fully wet it; finally, react the mixture in an 83℃ forced-air drying oven for 4 hours, cool it and pass it through a 200-mesh sieve to obtain activated composite mineral powder.

[0034] Step 2: After premixing 420g of activated composite mineral powder with 4800g of hydrophilic PET polyester chips, the mixture is melt-blended and granulated using a twin-screw extruder. The temperatures of the extruder from zone one to zone five are set to 235℃, 250℃, 260℃, 255℃ and 250℃ respectively to obtain mineral masterbatch.

[0035] PS chips (dried at 80℃) and mineral masterbatch (vacuum dried at 120℃) were dried separately, and then island-sea composite fibers were spun. The PS extruder temperatures were set as follows: Zone 1 200℃, Zone 2 220℃, Zone 3 230℃; the masterbatch extruder temperatures were set as follows: Zone 1 250℃, Zone 2 260℃, Zone 3 265℃. The island-sea mass ratio was controlled at 40:60. The melt was extruded through a trilobal hollow spinneret, cooled and solidified, and then subjected to hot drawing and heat setting to obtain island-sea structured fibers.

[0036] The island-sea structure fiber was treated in a 55°C dichloromethane solvent bath at a rate of 3 m / min for about 10 minutes to fully dissolve the PS island components; then it was rinsed in three room temperature dichloromethane baths, washed in a 50°C warm water bath, and finally dried in a 95°C forced-air drying bath to obtain a porous trilobal hollow mineral blend fiber.

[0037] Step 3: Wrap the trilobal hollow mineral blend fiber around a quartz frame and place it into the reaction chamber of the plasma device. After evacuating to below 20 Pa, introduce a mixture of oxygen and carbon dioxide (volume ratio 1:1) and maintain the working pressure at 50 Pa. Process at 250 W RF power for 8 min, then maintain vacuum cooling for 5 min, and slowly restore to normal pressure. Remove the fiber and perform subsequent processing as soon as possible to obtain plasma-treated fiber.

[0038] Step 4: Immerse the plasma-treated fiber in a 5% (w / w) aqueous solution of polyethylene glycol methacrylate and swell at 30°C for 30 min. After squeezing to control the liquid content, irradiate with 365nm ultraviolet light for 10 min under nitrogen protection to obtain pretreated fiber. Weigh 120g of acrylic acid and 90g of hydroxyethyl methacrylate and dissolve them in 1800mL of deionized water. Add 2g of water-soluble photoinitiator Irgacure 819 DW and stir until completely dissolved. Adjust the pH to 4.0-4.5 with 5% NaOH aqueous solution, then immerse the pretreated fiber in the solution and swell at 30°C for 40 min. After squeezing, irradiate with ultraviolet light under nitrogen protection for 15 min to complete the grafting. Place the grafted fiber in 40°C deionized water and wash with stirring for 24 hours. Then, place the washed fiber in an 80°C vacuum drying oven and dry for 2 hours to obtain modified polyester fiber.

[0039] A method for preparing lace trim fabric includes the following steps:

[0040] 1) Modified polyester fibers are spun into a breathable layer fabric, with an underside of 80g / m 2 The water-based polyurethane adhesive is applied evenly with a uniform coating amount.

[0041] 2) Overlap the adhesive-coated surface with the support layer fabric, and press and bond them together for 60 seconds using a hot press roller at 110℃ and 0.3MPa pressure;

[0042] 3) Lace the lace trim on both sides of the breathable layer and use low-temperature hot melt adhesive strips (melting point 90℃) to hot press for 20 seconds at 95℃ and 0.1MPa pressure to bond and fix it.

[0043] Example 2

[0044] A lace trim fabric includes a support layer, a breathable layer, and lace trim located on both sides of the breathable layer, wherein the support layer is woven from cotton fibers and the breathable layer is woven from modified polyester fibers.

[0045] Preparation of modified polyester fibers:

[0046] Step 1: Weigh 180g of natural zeolite micro powder and 70g of jade nano powder, and premix them in a high-speed mixer for 30min; then dissolve 3.6g of KH-550 silane coupling agent in a 500mL mixture of ethanol and deionized water (volume ratio 9:1) for 15min and add it to the mineral powder in spray form under low speed stirring to fully wet it; finally, react the mixture in an 83℃ forced-air drying oven for 4 hours, cool it and pass it through a 200-mesh sieve to obtain activated composite mineral powder.

[0047] Step 2: After premixing 300g of activated composite mineral powder with 4800g of hydrophilic PET polyester chips, the mixture is melt-blended and granulated using a twin-screw extruder. The temperatures of the extruder from zone one to zone five are set to 235℃, 250℃, 260℃, 255℃ and 250℃ respectively to obtain mineral masterbatch.

[0048] PS chips (dried at 80℃) and mineral masterbatch (vacuum dried at 120℃) were dried separately, and then island-sea composite fibers were spun. The PS extruder temperatures were set as follows: Zone 1 200℃, Zone 2 220℃, Zone 3 230℃; the masterbatch extruder temperatures were set as follows: Zone 1 250℃, Zone 2 260℃, Zone 3 265℃. The island-sea mass ratio was controlled at 40:60. The melt was extruded through a trilobal hollow spinneret, cooled and solidified, and then subjected to hot drawing and heat setting to obtain island-sea structured fibers.

[0049] The island-sea structure fiber was treated in a 55°C dichloromethane solvent bath at a rate of 3 m / min for about 10 minutes to fully dissolve the PS island components; then it was rinsed in three room temperature dichloromethane baths, washed in a 50°C warm water bath, and finally dried in a 95°C forced-air drying bath to obtain a porous trilobal hollow mineral blend fiber.

[0050] Step 3: Wrap the trilobal hollow mineral blend fiber around a quartz frame and place it into the reaction chamber of the plasma device. After evacuating to below 20 Pa, introduce a mixture of oxygen and carbon dioxide (volume ratio 1:1) and maintain the working pressure at 50 Pa. Process at 250 W RF power for 8 min, then maintain vacuum cooling for 5 min, and slowly restore to normal pressure. Remove the fiber and perform subsequent processing as soon as possible to obtain plasma-treated fiber.

[0051] Step 4: Immerse the plasma-treated fiber in a 5% (w / w) aqueous solution of polyethylene glycol methacrylate and swell at 30°C for 30 min. After squeezing to control the liquid content, irradiate with 365nm ultraviolet light for 10 min under nitrogen protection to obtain pretreated fiber. Weigh 120g of acrylic acid and 70g of hydroxyethyl methacrylate and dissolve them in 1800mL of deionized water. Add 2g of water-soluble photoinitiator Irgacure 819 DW and stir until completely dissolved. Adjust the pH to 4.0-4.5 with 5% NaOH aqueous solution, then immerse the pretreated fiber in the solution and swell at 30°C for 40 min. After squeezing, irradiate with ultraviolet light under nitrogen protection for 15 min to complete the grafting. Place the grafted fiber in 40°C deionized water and wash with stirring for 24 hours. Then, place the washed fiber in an 80°C vacuum drying oven and dry for 2 hours to obtain modified polyester fiber.

[0052] A method for preparing lace trim fabric includes the following steps:

[0053] 1) Modified polyester fibers are spun into a breathable layer fabric, with an underside of 80g / m 2 The water-based polyurethane adhesive is applied evenly with a uniform coating amount.

[0054] 2) Overlap the adhesive-coated surface with the support layer fabric, and press and bond them together for 60 seconds using a hot press roller at 110℃ and 0.3MPa pressure;

[0055] 3) Lace the lace trim on both sides of the breathable layer and use low-temperature hot melt adhesive strips (melting point 90℃) to hot press for 20 seconds at 95℃ and 0.1MPa pressure to bond and fix it.

[0056] Example 3

[0057] A lace trim fabric includes a support layer, a breathable layer, and lace trim located on both sides of the breathable layer, wherein the support layer is woven from cotton fibers and the breathable layer is woven from modified polyester fibers.

[0058] Preparation of modified polyester fibers:

[0059] Step 1: Weigh 180g of natural zeolite micro powder and 80g of jade nano powder, and premix them in a high-speed mixer for 30min; then dissolve 3.6g of KH-550 silane coupling agent in a 500mL mixture of ethanol and deionized water (volume ratio 9:1) for 15min and add it to the mineral powder in spray form under low speed stirring to fully wet it; finally, react the mixture in an 83℃ forced-air drying oven for 4 hours, cool it and pass it through a 200-mesh sieve to obtain activated composite mineral powder.

[0060] Step 2: After premixing 350g of activated composite mineral powder with 4800g of hydrophilic PET polyester chips, the mixture is melt-blended and granulated using a twin-screw extruder. The temperatures of the extruder from zone one to zone five are set to 235℃, 250℃, 260℃, 255℃ and 250℃ respectively to obtain mineral masterbatch.

[0061] PS chips (dried at 80℃) and mineral masterbatch (vacuum dried at 120℃) were dried separately, and then island-sea composite fibers were spun. The PS extruder temperatures were set as follows: Zone 1 200℃, Zone 2 220℃, Zone 3 230℃; the masterbatch extruder temperatures were set as follows: Zone 1 250℃, Zone 2 260℃, Zone 3 265℃. The island-sea mass ratio was controlled at 40:60. The melt was extruded through a trilobal hollow spinneret, cooled and solidified, and then subjected to hot drawing and heat setting to obtain island-sea structured fibers.

[0062] The island-sea structure fiber was treated in a 55°C dichloromethane solvent bath at a rate of 3 m / min for about 10 minutes to fully dissolve the PS island components; then it was rinsed in three room temperature dichloromethane baths, washed in a 50°C warm water bath, and finally dried in a 95°C forced-air drying bath to obtain a porous trilobal hollow mineral blend fiber.

[0063] Step 3: Wrap the trilobal hollow mineral blend fiber around a quartz frame and place it into the reaction chamber of the plasma device. After evacuating to below 20 Pa, introduce a mixture of oxygen and carbon dioxide (volume ratio 1:1) and maintain the working pressure at 50 Pa. Process at 250 W RF power for 8 min, then maintain vacuum cooling for 5 min, and slowly restore to normal pressure. Remove the fiber and perform subsequent processing as soon as possible to obtain plasma-treated fiber.

[0064] Step 4: Immerse the plasma-treated fiber in a 5% (w / w) aqueous solution of polyethylene glycol methacrylate and swell at 30°C for 30 min. After squeezing to control the liquid content, irradiate with 365nm ultraviolet light for 10 min under nitrogen protection to obtain pretreated fiber. Weigh 120g of acrylic acid and 80g of hydroxyethyl methacrylate and dissolve them in 1800mL of deionized water. Add 2g of water-soluble photoinitiator Irgacure 819 DW and stir until completely dissolved. Adjust the pH to 4.0-4.5 with 5% NaOH aqueous solution, then immerse the pretreated fiber in the solution and swell at 30°C for 40 min. After squeezing, irradiate with ultraviolet light under nitrogen protection for 15 min to complete the grafting. Place the grafted fiber in 40°C deionized water and wash with stirring for 24 hours. Then, place the washed fiber in an 80°C vacuum drying oven and dry for 2 hours to obtain modified polyester fiber.

[0065] A method for preparing lace trim fabric includes the following steps:

[0066] 1) Modified polyester fibers are spun into a breathable layer fabric, with an underside of 80g / m 2 The water-based polyurethane adhesive is applied evenly with a uniform coating amount.

[0067] 2) Overlap the adhesive-coated surface with the support layer fabric, and press and bond them together for 60 seconds using a hot press roller at 110℃ and 0.3MPa pressure;

[0068] 3) Lace the lace trim on both sides of the breathable layer and use low-temperature hot melt adhesive strips (melting point 90℃) to hot press for 20 seconds at 95℃ and 0.1MPa pressure to bond and fix it.

[0069] Example 4

[0070] A lace trim fabric includes a support layer, a breathable layer, and lace trim located on both sides of the breathable layer, wherein the support layer is woven from cotton fibers and the breathable layer is woven from modified polyester fibers.

[0071] Preparation of modified polyester fibers:

[0072] Step 1: Weigh 180g of natural zeolite micro powder and 120g of jade nano powder, and premix them in a high-speed mixer for 30min; then dissolve 3.6g of KH-550 silane coupling agent in a 500mL mixture of ethanol and deionized water (volume ratio 9:1) for 15min and add it to the mineral powder in a spray form under low speed stirring to fully wet it; finally, react the mixture in an 85℃ forced-air drying oven for 5 hours, cool it and pass it through a 200-mesh sieve to obtain activated composite mineral powder.

[0073] Step 2: After premixing 480g of activated composite mineral powder with 4800g of hydrophilic PET polyester chips, the mixture is melt-blended and granulated using a twin-screw extruder. The temperatures of the extruder from zone one to zone five are set to 235℃, 250℃, 260℃, 255℃ and 250℃ respectively to obtain mineral masterbatch.

[0074] PS chips (dried at 80℃) and mineral masterbatch (vacuum dried at 120℃) were dried separately, and then island-sea composite fibers were spun. The PS extruder temperatures were set as follows: Zone 1 200℃, Zone 2 220℃, Zone 3 230℃; the masterbatch extruder temperatures were set as follows: Zone 1 250℃, Zone 2 260℃, Zone 3 265℃. The island-sea mass ratio was controlled at 40:60. The melt was extruded through a trilobal hollow spinneret, cooled and solidified, and then subjected to hot drawing and heat setting to obtain island-sea structured fibers.

[0075] The island-sea structure fiber was treated in a 55°C dichloromethane solvent bath at a rate of 3 m / min for about 10 minutes to fully dissolve the PS island components; then it was rinsed in three room temperature dichloromethane baths, washed in a 50°C warm water bath, and finally dried in a 95°C forced-air drying bath to obtain a porous trilobal hollow mineral blend fiber.

[0076] Step 3: Wrap the trilobal hollow mineral blend fiber around a quartz frame and place it into the reaction chamber of the plasma device. After evacuating to below 20 Pa, introduce a mixture of oxygen and carbon dioxide (volume ratio 1:1) and maintain the working pressure at 50 Pa. Process at 300 W RF power for 10 min, then maintain vacuum cooling for 5 min, and slowly restore to normal pressure. Remove the fiber and perform subsequent processing as soon as possible to obtain plasma-treated fiber.

[0077] Step 4: Immerse the plasma-treated fiber in a 5% (w / w) aqueous solution of polyethylene glycol methacrylate and swell at 30°C for 30 min. After squeezing to control the liquid content, irradiate with 365nm ultraviolet light for 10 min under nitrogen protection to obtain pretreated fiber. Weigh 120g of acrylic acid and 100g of hydroxyethyl methacrylate and dissolve them in 1800mL of deionized water. Add 2g of water-soluble photoinitiator Irgacure 819 DW and stir until completely dissolved. Adjust the pH to 4.0-4.5 with 5% NaOH aqueous solution, then immerse the pretreated fiber in the solution and swell at 30°C for 40 min. After squeezing, irradiate with ultraviolet light under nitrogen protection for 15 min to complete the grafting. Place the grafted fiber in 40°C deionized water and wash with stirring for 24 hours. Then, place the washed fiber in an 80°C vacuum drying oven and dry for 2 hours to obtain modified polyester fiber.

[0078] A method for preparing lace trim fabric includes the following steps:

[0079] 1) Modified polyester fibers are spun into a breathable layer fabric, with an underside of 80g / m 2 The water-based polyurethane adhesive is applied evenly with a uniform coating amount.

[0080] 2) Overlap the adhesive-coated surface with the support layer fabric, and press and bond them together for 60 seconds using a hot press roller at 110℃ and 0.3MPa pressure;

[0081] 3) Lace the lace trim on both sides of the breathable layer and use low-temperature hot melt adhesive strips (melting point 90℃) to hot press for 20 seconds at 95℃ and 0.1MPa pressure to bond and fix it.

[0082] Example 5

[0083] A lace trim fabric includes a support layer, a breathable layer, and lace trim located on both sides of the breathable layer, wherein the support layer is woven from cotton fibers and the breathable layer is woven from modified polyester fibers.

[0084] Preparation of modified polyester fibers:

[0085] Step 1: Weigh 180g of natural zeolite micro powder and 60g of jade nano powder, and premix them in a high-speed mixer for 30min; then dissolve 3.6g of KH-550 silane coupling agent in a 500mL mixture of ethanol and deionized water (volume ratio 9:1) for 15min and add it to the mineral powder in spray form under low speed stirring to fully wet it; finally, react the mixture in an 80℃ forced-air drying oven for 3 hours, cool it and pass it through a 200-mesh sieve to obtain activated composite mineral powder.

[0086] Step 2: After premixing 240g of activated composite mineral powder with 4800g of hydrophilic PET polyester chips, the mixture is melt-blended and granulated using a twin-screw extruder. The temperatures of the extruder from zone one to zone five are set to 235℃, 250℃, 260℃, 255℃ and 250℃ respectively to obtain mineral masterbatch.

[0087] PS chips (dried at 80℃) and mineral masterbatch (vacuum dried at 120℃) were dried separately, and then island-sea composite fibers were spun. The PS extruder temperatures were set as follows: Zone 1 200℃, Zone 2 220℃, Zone 3 230℃; the masterbatch extruder temperatures were set as follows: Zone 1 250℃, Zone 2 260℃, Zone 3 265℃. The island-sea mass ratio was controlled at 40:60. The melt was extruded through a trilobal hollow spinneret, cooled and solidified, and then subjected to hot drawing and heat setting to obtain island-sea structured fibers.

[0088] The island-sea structure fiber was treated in a 55°C dichloromethane solvent bath at a rate of 3 m / min for about 10 minutes to fully dissolve the PS island components; then it was rinsed in three room temperature dichloromethane baths, washed in a 50°C warm water bath, and finally dried in a 95°C forced-air drying bath to obtain a porous trilobal hollow mineral blend fiber.

[0089] Step 3: Wrap the trilobal hollow mineral blend fiber around a quartz frame and place it into the reaction chamber of the plasma device. After evacuating to below 20 Pa, introduce a mixture of oxygen and carbon dioxide (volume ratio 1:1) and maintain the working pressure at 50 Pa. Process at 200 W RF power for 5 min, then maintain vacuum cooling for 5 min, and then slowly restore to normal pressure. Remove the fiber and perform subsequent processing as soon as possible to obtain plasma-treated fiber.

[0090] Step 4: Immerse the plasma-treated fiber in a 5% (w / w) aqueous solution of polyethylene glycol methacrylate and swell at 30°C for 30 min. After squeezing to control the liquid content, irradiate with 365nm UV light for 10 min under nitrogen protection to obtain pretreated fiber. Weigh 120g of acrylic acid and 60g of hydroxyethyl methacrylate and dissolve them in 1800mL of deionized water. Add 2g of water-soluble photoinitiator Irgacure 819 DW and stir until completely dissolved. Adjust the pH to 4.0-4.5 with 5% NaOH aqueous solution, then immerse the pretreated fiber in the solution and swell at 30°C for 40 min. After squeezing, irradiate with UV light under nitrogen protection for 15 min to complete the grafting. Place the grafted fiber in 40°C deionized water and wash with stirring for 24 hours. Then, place the washed fiber in an 80°C vacuum drying oven and dry for 2 hours to obtain modified polyester fiber.

[0091] A method for preparing lace trim fabric includes the following steps:

[0092] 1) Modified polyester fibers are spun into a breathable layer fabric, with an underside of 80g / m 2 The water-based polyurethane adhesive is applied evenly with a uniform coating amount.

[0093] 2) Overlap the adhesive-coated surface with the support layer fabric, and press and bond them together for 60 seconds using a hot press roller at 110℃ and 0.3MPa pressure;

[0094] 3) Lace the lace trim on both sides of the breathable layer and use low-temperature hot melt adhesive strips (melting point 90℃) to hot press for 20 seconds at 95℃ and 0.1MPa pressure to bond and fix it.

[0095] Comparative Example 1: The difference between Comparative Example 1 and Example 1 is that step 1 is omitted, that is, no activated composite mineral powder is added to the mineral masterbatch.

[0096] Comparative Example 2: The difference between Comparative Example 2 and Example 1 is that step 4 is omitted, that is, the fiber is not subjected to the grafting modification treatment of polyethylene glycol methacrylate, acrylic acid and hydroxyethyl methacrylate.

[0097] Comparative Example 3: The difference between Comparative Example 3 and Example 1 is that in step 4, the pre-grafting modification treatment of the fiber by polyethylene glycol methacrylate is omitted.

[0098] Performance testing:

[0099] 1. Moisture Absorption Rate Test: Samples of the lace fabric from the examples and comparative examples, measuring 50mm x 50mm, were cut and dried in a 105℃ oven until constant weight (mass denoted as m0). After cooling to room temperature, they were quickly placed in a constant temperature and humidity chamber at 20±2℃ and 65±4% relative humidity for 24 hours to equilibrate. The samples were then immediately weighed (mass denoted as m1). The moisture absorption rate was calculated using the formula: Moisture Absorption Rate (%) = (m1 - m0) / m0 × 100%. Each sample group was tested three times, and the average value was taken. The test results are shown in Table 1.

[0100] 2. Air permeability test: Using a fabric air permeability meter, a 120mm diameter sample was cut from the main body of the breathable layer of the fabric without lace trim. The test was conducted at a pressure difference of 100Pa and a test area of ​​20cm². 2 Under the specified conditions, the air velocity through the fabric was measured. Each sample was tested five times at different locations, and the average value was taken after removing outliers. The results are expressed in mm / s. The test results are shown in Table 1.

[0101] 3. Vapor Height Test: Cut the sample into 25mm × 150mm pieces (length direction consistent with the warp direction of the fabric). Immerse one end of the sample vertically into a container containing distilled water (containing 0.1% methylene blue dye for easy observation) to a depth of 10mm. The ambient temperature is 20±2℃ and the relative humidity is 65±4%. After 30 minutes, measure the maximum height to which the water rises vertically along the sample (i.e., wicking height). Each test is performed 3 times, and the average value is taken. The results are expressed in mm. The test results are shown in Table 1.

[0102] 4. Evaporation Rate Test: Simulating a human sweating environment, 100mm × 100mm samples were cut and dried at 105℃ to constant weight. 0.5mL of distilled water was then evenly added to the sample surface, and the sample was immediately weighed (mass recorded as m2). The samples were then suspended in a constant temperature and humidity chamber at 37±1℃ and 40±5% relative humidity, and weighed every 30 minutes (recorded as m3, m4, etc.) for 2 hours. The evaporation rate was calculated using the formula: Evaporation rate (g / h) = (m3 - m6) / 2 (m6 is the sample mass after 2 hours). Each test was performed three times, and the average value was taken. The test results are shown in Table 1.

[0103] Table 1:

[0104] Moisture absorption rate (%) Air permeability (mm / s) Cubic suction height (mm) Evaporation rate (g / h) Example 1 15.4 92.3 89.0 0.191 Example 2 14.6 89.7 87.5 0.176 Example 3 15.1 91.4 88.6 0.185 Example 4 15.8 93.6 89.7 0.197 Example 5 14.3 88.6 86.2 0.170 Comparative Example 1 8.7 56.8 56.7 0.124 Comparative Example 2 6.4 42.3 42.5 0.097 Comparative Example 3 10.2 65.9 65.9 0.143

[0105] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lace trim fabric, comprising a support layer, a breathable layer, and lace trim located on both sides of the breathable layer, characterized in that, The breathable layer is woven from modified polyester fibers; The method for preparing the modified polyester fiber includes the following steps: S1. Natural zeolite micro powder and jade nano powder are mixed and sprayed with a mixed solution of ethanol and deionized water containing KH-550 silane coupling agent. After reaction and sieving, activated composite mineral powder is obtained. S2. The activated composite mineral powder is melt-blended and granulated with hydrophilic modified polyester chips to obtain mineral masterbatch; polystyrene is used as the island component and the mineral masterbatch is used as the sea component. The island-sea composite spinning is carried out and formed by a trilobal hollow spinneret. The island component is then dissolved in solvent, rinsed and dried to obtain mineral blended fiber with a hollow porous structure. S3. Place the mineral blended fibers in a vacuum plasma treatment device and introduce a mixture of oxygen and carbon dioxide for plasma treatment to obtain plasma-treated fibers. S4. Immerse the plasma-treated fiber in a solution containing acrylic acid, hydroxyethyl methacrylate and a water-soluble photoinitiator. After swelling, squeeze out the excess liquid and irradiate with ultraviolet light under a nitrogen atmosphere to initiate a graft copolymerization reaction. After removing the fiber, wash it with hot water to remove unreacted monomers and homopolymers, and then dry it to obtain the final product.

2. The lace trim fabric according to claim 1, characterized in that, In step S1, the mass ratio of natural zeolite micro powder to jade nano powder is 6:2 to 4.

3. The lace trim fabric according to claim 1, characterized in that, In step S1, the reaction temperature is 80-85℃ and the reaction time is 3-5h.

4. The lace trim fabric according to claim 1, characterized in that, In step S2, the mass ratio of hydrophilic modified polyester chips to activated composite mineral powder is 20:1 to 2.

5. The lace trim fabric according to claim 1, characterized in that, In step S2, the solvent used to dissolve the island components is dichloromethane.

6. The lace trim fabric according to claim 1, characterized in that, In step S3, the plasma treatment power is 200-300W and the plasma treatment time is 5-10min.

7. The lace trim fabric according to claim 1, characterized in that, In step S4, the plasma-treated fibers are pre-treated with polyethylene glycol methacrylate grafting.

8. A lace trim fabric according to claim 1, characterized in that, In step S4, the mass ratio of acrylic acid to hydroxyethyl methacrylate is 6:3 to 5.

9. A method for preparing lace trim fabric as described in any one of claims 1 to 8, characterized in that, Includes the following steps: 1) Apply a layer of water-based polyurethane adhesive evenly to the lower surface of the breathable layer; 2) The breathable layer after applying the adhesive is stacked with the support layer fabric and then bonded by pressing under pressure using a hot press roller; 3) Lace the lace trim on both sides of the composite breathable layer and fix it with low-temperature hot melt adhesive strips to obtain the final product.

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