Novel modified polyester yarn pleated fabric and preparation method thereof

Abstract

The invention discloses a novel modified polyester yarn pleated fabric and a preparation method, and relates to the technical field of textile fabrics, the preparation method comprises the following steps: S1, preparing modified polyester yarns from a hydrophilic polymer, an antibacterial polymer, a degradable polymer and a nano modified material; s2, combining the bio-based material with the modified polyester yarns; s3, weaving an initial blank of the fabric; s4, adjusting the weft yarn density; step S5, carrying out laser pleating; s6, an ultrasonic generator and a 3D printing mold assist in pleating; and S7, carrying out temperature regulation finishing, surface functional coating treatment and biological enzyme finishing. The hydrophilic polymer, the antibacterial polymer, the degradable polymer and the nano modified material are blended at a high speed and spun into the modified polyester yarn, then the novel modified polyester yarn pleated fabric is prepared, and the problems that a traditional polyester fabric is poor in hydrophilicity, insufficient in antibacterial capacity, non-degradable and lack of self-cleaning capacity are solved.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, in particular to a novel modified polyester yarn pleated fabric and a preparation method thereof. Background Art

[0002] Traditional polyester yarn pleated fabrics have the problems of poor hydrophilicity, insufficient antibacterial ability, non-degradability and lack of self-cleaning ability. These problems make traditional polyester fabrics difficult to quickly absorb moisture and perspiration in a humid environment, and are not comfortable to wear. At the same time, their antibacterial properties are limited, and it is difficult to effectively inhibit bacterial growth, posing a potential threat to the health of the wearer. In addition, traditional polyester fabrics are not easy to degrade, which causes a long-term burden on the environment, and lack of self-cleaning ability, requiring frequent cleaning, increasing maintenance costs. The polyester yarn pleated fabric of the present application can solve the problems of traditional polyester fabrics such as poor hydrophilicity, insufficient antibacterial ability, non-degradability and lack of self-cleaning ability.

[0003] The defects of existing polyester yarn pleated fabrics are: 1. Patent document CN114232175A discloses a wrinkled fabric and its preparation process. The document mainly considers how to solve the problem that wrinkled fabrics lose their wrinkled feeling after being pulled, washed and rubbed, but does not consider how to solve the problems of poor hydrophilicity, insufficient antibacterial ability, non-degradability and lack of self-cleaning ability of traditional polyester fabrics; 2. Patent document CN115074891B discloses a three-dimensional high-temperature and high-pressure ironing process for shirt fabrics. The document mainly considers how to solve the problems of easy folding of clothes during ironing in the existing traditional ironing machine, poor shaping effect, low shaping efficiency and high cost, but does not consider how to solve the problems of poor biocompatibility, insufficient air permeability and over-reliance on petrochemical raw materials of traditional polyester fabrics; 3. Patent document CN114737308B discloses a warm-sensing bionic fish scale structure wrinkled knitted fabric and its knitting process. The document mainly considers how to solve the problem that most of the current computer flat knitting machines are used to design the weft knitting structure to obtain the bionic fish scale structure. Although the layering requirements are met, the fabric structure is complex and the production efficiency of the computer flat knitting machine is low. It does not consider how to solve the problem of the single structure and insufficient performance of traditional polyester fabrics. 4. Patent document CN115506062B discloses an environmentally friendly flame-retardant polyester yarn and a preparation method thereof. The document mainly considers how to avoid the use of a large amount of toxic flame retardants in the prior art during the preparation process, and how to avoid the release and volatilization of flame retardant residues. It does not consider how to solve the problems of inaccurate pleating effect of traditional polyester fabrics, single surface function and impurities on the fiber surface affecting the feel. Summary of the invention

[0004] The object of the present invention is to provide a novel modified polyester yarn pleated fabric and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for preparing a novel modified polyester yarn pleated fabric, the method for preparing the novel modified polyester yarn pleated fabric comprising: Step S1, blending a hydrophilic polymer, an antibacterial polymer and a degradable polymer at high speed, adding a nano-modified material for ultrasonic dispersion treatment, and finally melt-blending and extruding and spinning through a twin-screw extruder to obtain a modified polyester yarn; Step S2, combining the bio-based material with the modified polyester yarn obtained in step S1 by a chemical method of graft copolymerization; Step S3, using modified polyester yarn, adopting a three-layer structure for three-dimensional weaving, controlling the twist and interweaving angle of each layer of yarn, and weaving a raw fabric; Step S4: Divide the key area and the general area according to the requirements of pleating and texture, set different warp yarn densities respectively, and adjust the weft yarn density synchronously; Step S5, performing laser pleating treatment to melt and reshape the fibers to form pleats; Step S6, first using an ultrasonic generator to cause the yarn to generate heat through friction to fix the wrinkle texture, and then using a 3D printing mold to assist in pleating; Step S7, performing temperature adjustment finishing, surface functional coating treatment and biological enzyme finishing.

[0006] Preferably, step S1 further includes: Step S11: weigh 62-74 parts of polyester resin, 11-17 parts of hydrophilic polymer, 7-14 parts of antibacterial polymer, 4-9 parts of degradable polymer, and 3-7 parts of nano-modified material; Step S12: high-speed blending, putting the hydrophilic polymer, the antibacterial polymer and the degradable polymer into a high-speed blender, setting the speed to 1200-1500 rpm, blending for 20-30 minutes, during which the temperature is controlled at 40°C-50°C by jacket water cooling, adding the nano-modified material after mixing evenly, and maintaining high-speed stirring for 5-10 minutes; Step S13: Ultrasonic dispersion and spinning, move the blend containing the nano-modified material to the ultrasonic equipment, set the frequency to 40kHz-50kHz, treat for 30-40 minutes, and then transport it to the twin-screw extruder, preheat each temperature zone to 230℃-250℃, start the extruder, control the screw speed at 300-350 rpm, and complete the melt blending extrusion spinning.

[0007] Preferably, step S11 further includes: The hydrophilic polymer is prepared by blending polyethylene glycol and polyvinyl alcohol in a mass ratio of 3:2, the antibacterial polymer is a quaternary ammonium salt antibacterial polymer with a quaternary ammonium salt group content greater than 15%, the degradable polymer is prepared by compounding polylactic acid and polycaprolactone in a mass ratio of 1:1, and the nano-modified material is a composite nanoparticle composed of nano-titanium dioxide and nano-silver in a mass ratio of 2:1, the nano-titanium dioxide particle size is 20-30nm, and the nano-silver particle size is 10-15nm.

[0008] Preferably, step S2 further includes: Step S21: preparing 5 to 8 parts of a bio-based material, which is obtained by mixing cellulose extracted from flax fiber and protein extracted from soy protein in a mass ratio of 4:1; Step S22: graft copolymerization reaction, soaking the yarn obtained in step S1 in a reaction solution containing bio-based materials, an initiator and a catalyst, wherein the initiator is azobisisobutyronitrile, and the amount used is 0.5-1% of the total weight of the bio-based materials, and the solvent is a mixture of toluene and dimethylformamide, and the mixing ratio is 1:1, heating to 70°C-80°C, reacting for 3-4 hours, and continuously stirring; Step S23: After the reaction is completed, the yarn is washed to remove residual impurities and dried at 60°C-70°C.

[0009] Preferably, step S3 further includes: Step S31: selecting a coarse-count modified polyester yarn with a twist of 40-50 twists / 10cm in the bottom layer, a fine-count modified polyester yarn with a medium twist of 30-40 twists / 10cm in the middle layer, and a nano-modified polyester yarn with a twist of 20-30 twists / 10cm in the top layer; Step S32: The yarns of each layer are interwoven at an interweaving angle of 45°-60° to weave a raw fabric with a thickness of 0.4mm-0.6mm and a gram weight of 150g / m²-200g / m².

[0010] Preferably, step S4 further includes: Step S41: performing area division, where the area where pleats with a depth exceeding 3 mm need to be formed is the key area, and the rest is the common area; Step S42: Density adjustment is performed. The warp yarn density in the key area is set to 60-80 yarns / cm, the warp yarn density in the general area is set to 40-50 yarns / cm, and the weft yarn density is uniformly set to 30-40 yarns / cm.

[0011] Preferably, step S5 further includes: Step S51: Select a laser device with a power of 300W-500W and a wavelength of 1064nm, write a laser heating program, and set the heating time to 0.5-1.0 seconds / point; Step S52: Start the laser device to locally heat the fabric, so that the polyester fiber of the fabric is melted and reshaped, so that the crease depth reaches 4mm-6mm, the crease clarity is greater than 95%, and the crease angle error is less than 2°.

[0012] Preferably, step S6 further includes: Step S61: Use an ultrasonic generator with a frequency of 20kHz-30kHz to act on the fabric for 5-10 minutes, and set the pressure to 0.3MPa-0.5MPa; Step S62: using photosensitive resin material to make a 3D printed pleating mold with an accuracy of ±0.05 mm through photocuring 3D printing, and using the 3D printed mold to assist pleating, so that the pleating effect has a fit greater than 98%.

[0013] Preferably, step S7 further includes: Step S71: evenly attaching phase change material microcapsules to the surface of the fabric, the microcapsule particle size is 1μm-2μm, the loading amount is 8g / m²-10g / m², and the phase change temperature range of the phase change material is 20℃-30℃; Step S72: using a spraying process to uniformly apply the super hydrophobic coating material on the surface of the fabric at a spraying amount of 0.2g / cm²-0.3g / cm², with a coating thickness of 50μm-80μm, and applying the anti-ultraviolet coating material at a spraying amount of 0.1g / cm²-0.2g / cm²; Step S73: Bio-enzyme finishing, using a composite bio-enzyme composed of cellulase and protease in a mass ratio of 3:2, with an enzyme dosage of 1g / L-2g / L, treating the fabric for 30-40 minutes at a temperature of 40°C-50°C and a pH value of 6-7 to remove impurities and hairiness on the surface of the fabric fibers.

[0014] Preferably, a novel modified polyester yarn pleated fabric is prepared by a novel modified polyester yarn pleated fabric preparation method.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention prepares a new type of modified polyester yarn pleated fabric by high-speed blending of hydrophilic polymers, antibacterial polymers, degradable polymers and nano-modified materials and spinning them into modified polyester yarns. This method of integrating multiple functional polymers and nano-materials achieves multi-dimensional performance improvement of modified polyester yarns. Specifically, the blending of polyethylene glycol and polyvinyl alcohol constructs a hydrophilic channel inside the fiber, and water molecules are quickly adsorbed and penetrated, which greatly shortens the fabric soaking time, significantly enhances the hydrophilicity of the polyester yarn pleated fabric, and makes the fabric still comfortable in a humid environment; the quaternary ammonium salt antibacterial polymer is evenly dispersed, continuously destroys the bacterial cell membrane, and gives the polyester yarn pleated fabric a strong antibacterial ability, effectively inhibits bacterial growth, and protects the health of the wearer; the compound use of polylactic acid and polycaprolactone introduces a degradable ester bond structure, shortens the degradation cycle, improves the degradable characteristics of the polyester yarn pleated fabric, conforms to the environmental protection trend, and reduces the impact of waste fabrics on the environment; in addition, the composite nanoparticles of nano titanium dioxide and nano silver not only further enhance the antibacterial properties of the fabric, but also enhance the self-cleaning ability of the fabric through its photocatalytic effect, reducing the frequency and difficulty of daily cleaning. Therefore, the present invention solves the problems of poor hydrophilicity, insufficient antibacterial ability, non-degradability and lack of self-cleaning ability of traditional polyester fabrics.

[0016] 2. The present invention combines bio-based materials with modified polyester yarns by adopting a chemical method of graft copolymerization, innovatively realizing the bio-based nature of fabrics while retaining the excellent properties of polyester fibers. The introduction of cellulose extracted from flax fibers and protein extracted from soy protein, which are bio-based materials, chemically bonds the bio-based materials and polyester fibers tightly, enhances the intermolecular forces, and improves the tensile strength of the fabrics. Natural cellulose and protein have hydrophilic groups, and the pore structure is optimized, which improves the air permeability of polyester yarn pleated fabrics, making them dry and comfortable to wear. The addition of bio-based ingredients can reduce the proportion of petrochemical raw materials. Not only does it improve the biocompatibility and sustainability of polyester yarn pleated fabrics, but it also enhances the overall strength and wear resistance of polyester yarn pleated fabrics through chemical bonding with polyester fibers. The existing production of polyester yarn pleated fabrics is overly dependent on petrochemical raw materials, and the utilization rate of bio-based materials is almost zero. Not only does it consume a lot of resources, but the production process also emits a large amount of harmful gases and wastewater. The resulting fabrics have poor biocompatibility and are easily allergic when worn close to the skin. The insufficient breathability causes stuffiness and discomfort. Compared with the prior art, the polyester yarn pleated fabric prepared by the present invention not only significantly reduces the negative impact on the production environment of polyester yarn pleated fabrics, including reducing the emission of harmful substances and energy consumption, but also improves the breathability and comfort of polyester yarn pleated fabrics through the natural properties of bio-based materials, including moisture absorption, breathability and soft touch. Therefore, it can solve the problems of poor biocompatibility, insufficient breathability and over-reliance on petrochemical raw materials of traditional polyester fabrics.

[0017] 3. The present invention uses modified polyester yarn and adopts a three-layer structure for three-dimensional weaving, and controls the twist and interweaving angle of each layer of yarn, so as to achieve the effect of diversification of the structure and optimization of the performance of polyester yarn pleated fabric. The bottom coarse yarn provides the basic strength and stability of the polyester yarn pleated fabric, ensuring that the fabric is not easily deformed during use; the middle fine yarn enhances the air permeability and softness of the polyester yarn pleated fabric, making the fabric more fit the human body curve and more comfortable to wear; and the top layer of nano-modified yarn further enhances the wear resistance and antibacterial properties of the polyester yarn pleated fabric, prolongs the service life of the fabric and protects the health of the wearer. The multi-layer structural design not only improves the strength and air permeability of the polyester yarn pleated fabric, but also forms a unique texture and visual effect through the interweaving of different yarns, which meets the dual needs of consumers for the performance and aesthetics of the polyester yarn pleated fabric. Compared with the prior art, it can solve the problem of the single structure and insufficient performance of traditional polyester fabrics.

[0018] 4. The present invention achieves the effects of accurate fabric pleating, diversified surface functions and removal of impurities on the fiber surface by performing laser pleating treatment, ultrasonic fixing of pleat texture and 3D printing mold auxiliary pleating, as well as temperature adjustment finishing, surface functional coating treatment and bio-enzyme finishing. The laser pleating technology ensures the depth and clarity of the pleats, and the ultrasonic treatment further fixes the pleat texture by frictional heat between the yarns. The introduction of the 3D printing mold makes the pleating effect more in line with the design requirements, and improves the overall aesthetics and durability of the polyester yarn pleated fabric. In addition, the temperature adjustment finishing makes the polyester The polyester yarn pleated fabric has better temperature adaptability, and the surface functional coating enhances the waterproof, UV protection and super hydrophobic properties of the polyester yarn pleated fabric. The bio-enzyme finishing improves the cleanliness and feel of the polyester yarn pleated fabric by removing impurities and hairiness on the fiber surface. Compared with the existing technology, it not only improves the pleating accuracy and functionality of the polyester yarn pleated fabric, but also ensures the cleanliness and comfortable feel of the polyester yarn pleated fabric through fine post-processing technology. Therefore, it can solve the problems of inaccurate pleating effect, single surface function and impurities on the fiber surface affecting the feel of traditional polyester fabrics. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely. 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.

[0020] Embodiment 1: A method for preparing a novel modified polyester yarn pleated fabric, the method comprising: Step S1, blending a hydrophilic polymer, an antibacterial polymer and a degradable polymer at high speed, adding a nano-modified material for ultrasonic dispersion treatment, and finally melt-blending and extruding and spinning through a twin-screw extruder to obtain a modified polyester yarn; Step S1 also includes: Step S11: weighing 65 parts of polyester resin, 13 parts of hydrophilic polymer, 9 parts of antibacterial polymer, 6 parts of degradable polymer and 4 parts of nano-modified material; The hydrophilic polymer is a mixture of polyethylene glycol and polyvinyl alcohol in a mass ratio of 3:2, the antibacterial polymer is a quaternary ammonium salt antibacterial polymer with a quaternary ammonium salt group content of 18%, the degradable polymer is a mixture of polylactic acid and polycaprolactone in a mass ratio of 1:1, and the nano-modified material is a composite nanoparticle composed of nano-titanium dioxide and nano-silver in a mass ratio of 2:1, with a nano-titanium dioxide particle size of 22nm and a nano-silver particle size of 12nm.

[0021] Step S12: high-speed blending, putting the hydrophilic polymer, the antibacterial polymer and the degradable polymer into a high-speed blender, setting the speed to 1300 rpm, blending for 22 minutes, during which the temperature is controlled at 42° C. by jacket water cooling, adding the nano-modified material after mixing evenly, and maintaining high-speed stirring for 6 minutes; Step S13: Ultrasonic dispersion and spinning, move the blend containing the nano-modified material to the ultrasonic equipment, set the frequency to 42kHz, and treat for 32 minutes. After the end, it is transported to the twin-screw extruder, preheat each temperature zone to 235°C, start the extruder, control the screw speed at 310 rpm, and complete the melt blending extrusion spinning.

[0022] Step S2, combining the bio-based material with the modified polyester yarn obtained in step S1 by a chemical method of graft copolymerization; Step S2 also includes: Step S21: preparing 6 portions of bio-based materials, which are obtained by mixing cellulose extracted from flax fiber and protein extracted from soy protein in a mass ratio of 4:1; Step S22: graft copolymerization reaction, the yarn obtained in step S1 is immersed in a reaction solution containing bio-based materials, an initiator and a catalyst, the initiator is azobisisobutyronitrile, the amount used is 0.6% of the total weight of the bio-based materials, the solvent is a mixture of toluene and dimethylformamide, the mixing ratio is 1:1, the temperature is raised to 72°C, the reaction is carried out for 3.2 hours, and stirring is continued; Step S23: After the reaction is completed, the yarn is washed to remove residual impurities and dried at 62°C.

[0023] Step S3, using modified polyester yarn, adopting a three-layer structure for three-dimensional weaving, controlling the twist and interweaving angle of each layer of yarn, and weaving a raw fabric; Step S3 also includes: Step S31: selecting a coarse-count modified polyester yarn with a twist of 42 twists / 10 cm in the bottom layer, a fine-count modified polyester yarn with a medium twist of 32 twists / 10 cm in the middle layer, and a nano-modified polyester yarn with a twist of 22 twists / 10 cm in the top layer; Step S32: The yarns of each layer are interwoven at an interweaving angle of 50° to weave a raw fabric with a thickness of 0.45 mm and a gram weight of 160 g / m².

[0024] Step S4: Divide the key area and the general area according to the requirements of pleating and texture, set different warp yarn densities respectively, and adjust the weft yarn density synchronously; Step S4 also includes: Step S41: performing area division, where the area where pleats with a depth exceeding 3 mm need to be formed is the key area, and the rest is the common area; Step S42: Density adjustment is performed. The warp yarn density in the key area is set to 65 yarns / cm, the warp yarn density in the general area is set to 42 yarns / cm, and the weft yarn density is uniformly set to 32 yarns / cm.

[0025] Step S5, performing laser pleating treatment to melt and reshape the fibers to form pleats; Step S5 also includes: Step S51: Select a laser device with a power of 350W and a wavelength of 1064nm, write a laser heating program, and set the heating time to 0.6 seconds / point; Step S52: Start the laser device to locally heat the fabric, so that the polyester fiber of the fabric is melted and reshaped, so that the crease depth reaches 4.5 mm, the crease clarity is 96%, and the crease angle error is less than 1.5°.

[0026] Step S6, first using an ultrasonic generator to cause the yarn to generate heat through friction to fix the wrinkle texture, and then using a 3D printing mold to assist in pleating; Step S6 also includes: Step S61: Use an ultrasonic generator with a frequency of 22kHz to act on the fabric for 6 minutes, and the pressure is set to 0.35MPa; Step S62: using photosensitive resin material to make a 3D printed pleating mold with an accuracy of ±0.05 mm through photocuring 3D printing, and using the 3D printed mold to assist pleating, so that the pleating effect has a fit greater than 98%.

[0027] Step S7, performing temperature adjustment finishing, surface functional coating treatment and biological enzyme finishing.

[0028] Step S7 also includes: Step S71: evenly attaching phase change material microcapsules to the surface of the fabric, the microcapsule particle size is 1.2 μm, and the loading amount is 8.5 g / m²; Step S72: using a spraying process to evenly apply the super-hydrophobic coating material on the surface of the fabric at a spraying amount of 0.22 g / cm², with a coating thickness of 60 μm, and applying the anti-ultraviolet coating material at a spraying amount of 0.12 g / cm²; Step S73: Bio-enzyme finishing, using a composite bio-enzyme composed of cellulase and protease in a mass ratio of 3:2, with an enzyme dosage of 1.2 g / L, treating the fabric for 32 minutes at a temperature of 42° C. and a pH value of 6.2 to remove impurities and hairiness on the surface of the fabric fibers.

[0029] Embodiment 2: A method for preparing a novel modified polyester yarn pleated fabric, the method comprising: Step S1, blending a hydrophilic polymer, an antibacterial polymer and a degradable polymer at high speed, adding a nano-modified material for ultrasonic dispersion treatment, and finally melt-blending and extruding and spinning through a twin-screw extruder to obtain a modified polyester yarn; Step S1 also includes: Step S11: weighing 70 parts of polyester resin, 15 parts of hydrophilic polymer, 11 parts of antibacterial polymer, 7 parts of degradable polymer and 5 parts of nano-modified material; The hydrophilic polymer is prepared by blending polyethylene glycol and polyvinyl alcohol in a mass ratio of 3:2, the antibacterial polymer is a quaternary ammonium salt antibacterial polymer with a quaternary ammonium salt group content of 20%, the degradable polymer is prepared by compounding polylactic acid and polycaprolactone in a mass ratio of 1:1, and the nano-modified material is a composite nanoparticle composed of nano-titanium dioxide and nano-silver in a mass ratio of 2:1, the particle size of nano-titanium dioxide is 25nm, and the particle size of nano-silver is 13nm.

[0030] Step S12: high-speed blending: putting the hydrophilic polymer, antibacterial polymer and degradable polymer into a high-speed blender, setting the speed to 1400 rpm, blending for 25 minutes, during which the temperature is controlled at 45° C. by jacket water cooling, adding the nano-modified material after mixing evenly, and maintaining high-speed stirring for 8 minutes; Step S13: Ultrasonic dispersion and spinning. Move the blend containing the nano-modified material to the ultrasonic equipment, set the frequency to 45kHz, and treat for 35 minutes. After the end, it is transported to the twin-screw extruder, preheat each temperature zone to 240°C, start the extruder, control the screw speed at 330 rpm, and complete the melt blending extrusion spinning.

[0031] Step S2, combining the bio-based material with the modified polyester yarn obtained in step S1 by a chemical method of graft copolymerization; Step S2 also includes: Step S21: preparing 7 parts of bio-based materials, which are obtained by mixing cellulose extracted from flax fiber and protein extracted from soy protein in a mass ratio of 4:1; Step S22: graft copolymerization reaction, the yarn obtained in step S1 is immersed in a reaction solution containing bio-based materials, an initiator and a catalyst, the initiator is azobisisobutyronitrile, the amount used is 0.8% of the total weight of the bio-based materials, the solvent is a mixture of toluene and dimethylformamide, the mixing ratio is 1:1, the temperature is raised to 75°C, the reaction is carried out for 3.5 hours, and stirring is continued; Step S23: After the reaction is completed, the yarn is washed to remove residual impurities and dried at 65°C.

[0032] Step S3, using modified polyester yarn, adopting a three-layer structure for three-dimensional weaving, controlling the twist and interweaving angle of each layer of yarn, and weaving a raw fabric; Step S3 also includes: Step S31: selecting a coarse-count modified polyester yarn with a twist of 45 twists / 10 cm in the bottom layer, a fine-count modified polyester yarn with a medium twist of 35 twists / 10 cm in the middle layer, and a nano-modified polyester yarn with a twist of 25 twists / 10 cm in the top layer; Step S32: The yarns of each layer are interwoven at an interweaving angle of 55° to weave a raw fabric with a thickness of 0.5 mm and a gram weight of 180 g / m².

[0033] Step S4: Divide the key area and the general area according to the requirements of pleating and texture, set different warp yarn densities respectively, and adjust the weft yarn density synchronously; Step S4 also includes: Step S41: performing area division, where the area where pleats with a depth exceeding 3 mm need to be formed is the key area, and the rest is the common area; Step S42: Density adjustment is performed, the warp yarn density in the key area is set to 70 yarns / cm, the warp yarn density in the general area is set to 45 yarns / cm, and the weft yarn density is uniformly set to 35 yarns / cm.

[0034] Step S5, performing laser pleating treatment to melt and reshape the fibers to form pleats; Step S5 also includes: Step S51: Select a laser device with a power of 350W and a wavelength of 1064nm, write a laser heating program, and set the heating time to 0.8 seconds / point; Step S52: Start the laser device to locally heat the fabric, so that the polyester fiber of the fabric is melted and reshaped, so that the crease depth reaches 5 mm, the crease clarity is 97%, and the crease angle error is less than 1.5°.

[0035] Step S6, first using an ultrasonic generator to cause the yarn to generate heat through friction to fix the wrinkle texture, and then using a 3D printing mold to assist in pleating; Step S6 also includes: Step S61: Use an ultrasonic generator with a frequency of 25kHz to act on the fabric for 8 minutes, and the pressure is set to 0.40MPa; Step S62: using photosensitive resin material to make a 3D printed pleating mold with an accuracy of ±0.05 mm through photocuring 3D printing, and using the 3D printed mold to assist pleating, so that the pleating effect has a fit greater than 98%.

[0036] Step S7, performing temperature adjustment finishing, surface functional coating treatment and biological enzyme finishing.

[0037] Step S7 also includes: Step S71: evenly attaching phase change material microcapsules to the surface of the fabric, the microcapsule particle size is 1.5 μm, and the loading amount is 9 g / m²; Step S72: using a spraying process to evenly apply the super-hydrophobic coating material on the surface of the fabric at a spraying amount of 0.25 g / cm², with a coating thickness of 60 μm, and applying the anti-ultraviolet coating material at a spraying amount of 0.15 g / cm²; Step S73: Bio-enzyme finishing, using a composite bio-enzyme composed of cellulase and protease in a mass ratio of 3:2, with an enzyme dosage of 1.5 g / L, treating the fabric for 35 minutes at a temperature of 45° C. and a pH value of 6.5 to remove impurities and hairiness on the surface of the fabric fibers.

[0038] Embodiment 3, A method for preparing a novel modified polyester yarn pleated fabric, the method comprising: Step S1, blending a hydrophilic polymer, an antibacterial polymer and a degradable polymer at high speed, adding a nano-modified material for ultrasonic dispersion treatment, and finally melt-blending and extruding and spinning through a twin-screw extruder to obtain a modified polyester yarn; Step S1 also includes: Step S11: weighing 72 parts of polyester resin, 16 parts of hydrophilic polymer, 13 parts of antibacterial polymer, 8 parts of degradable polymer and 6 parts of nano-modified material; The hydrophilic polymer is prepared by blending polyethylene glycol and polyvinyl alcohol in a mass ratio of 3:2, the antibacterial polymer is a quaternary ammonium salt antibacterial polymer with a quaternary ammonium salt group content of 17%, the degradable polymer is prepared by compounding polylactic acid and polycaprolactone in a mass ratio of 1:1, and the nano-modified material is a composite nanoparticle composed of nano-titanium dioxide and nano-silver in a mass ratio of 2:1, the particle size of nano-titanium dioxide is 24nm, and the particle size of nano-silver is 13nm.

[0039] Step S12: high-speed blending: putting the hydrophilic polymer, the antibacterial polymer and the degradable polymer into a high-speed blender, setting the speed to 1450 rpm, blending for 28 minutes, during which the temperature is controlled at 48° C. by jacket water cooling, adding the nano-modified material after mixing evenly, and maintaining high-speed stirring for 9 minutes; Step S13: Ultrasonic dispersion and spinning, move the blend containing the nano-modified material to the ultrasonic equipment, set the frequency to 47kHz, and treat for 37 minutes. After the end, it is transported to the twin-screw extruder, preheat each temperature zone to 245°C, start the extruder, control the screw speed at 340 rpm, and complete the melt blending extrusion spinning.

[0040] Step S2, combining the bio-based material with the modified polyester yarn obtained in step S1 by a chemical method of graft copolymerization; Step S2 also includes: Step S21: preparing 8 portions of bio-based materials, which are obtained by mixing cellulose extracted from flax fiber and protein extracted from soy protein in a mass ratio of 4:1; Step S22: graft copolymerization reaction, the yarn obtained in step S1 is immersed in a reaction solution containing bio-based materials, an initiator and a catalyst, the initiator is azobisisobutyronitrile, the amount used is 0.9% of the total weight of the bio-based materials, the solvent is a mixture of toluene and dimethylformamide, the mixing ratio is 1:1, the temperature is raised to 77°C, the reaction is carried out for 3.7 hours, and stirring is continued; Step S23: After the reaction is completed, the yarn is washed to remove residual impurities and dried at 68°C.

[0041] Step S3, using modified polyester yarn, adopting a three-layer structure for three-dimensional weaving, controlling the twist and interweaving angle of each layer of yarn, and weaving a raw fabric; Step S3 also includes: Step S31: selecting a coarse-count modified polyester yarn with a twist of 48 twists / 10 cm in the bottom layer, a fine-count modified polyester yarn with a medium twist of 38 twists / 10 cm in the middle layer, and a nano-modified polyester yarn with a twist of 28 twists / 10 cm in the top layer; Step S32: The yarns of each layer are interwoven at an interweaving angle of 55° to weave a raw fabric with a thickness of 0.55 mm and a gram weight of 190 g / m².

[0042] Step S4: Divide the key area and the general area according to the requirements of pleating and texture, set different warp yarn densities respectively, and adjust the weft yarn density synchronously; Step S4 also includes: Step S41: performing area division, where the area where pleats with a depth exceeding 3 mm need to be formed is the key area, and the rest is the common area; Step S42: Density adjustment is performed, the warp yarn density in the key area is set to 75 yarns / cm, the warp yarn density in the general area is set to 48 yarns / cm, and the weft yarn density is uniformly set to 38 yarns / cm.

[0043] Step S5, performing laser pleating treatment to melt and reshape the fibers to form pleats; Step S5 also includes: Step S51: Select a laser device with a power of 450W and a wavelength of 1064nm, write a laser heating program, and set the heating time to 0.9 seconds / point; Step S52: Start the laser device to locally heat the fabric, so that the polyester fiber of the fabric is melted and reshaped, so that the crease depth reaches 5.5 mm, the crease clarity is 98%, and the crease angle error is less than 1.5°.

[0044] Step S6, first using an ultrasonic generator to cause the yarn to generate heat through friction to fix the wrinkle texture, and then using a 3D printing mold to assist in pleating; Step S6 also includes: Step S61: Use an ultrasonic generator with a frequency of 28kHz to act on the fabric for 9 minutes, and the pressure is set to 0.45MPa; Step S62: using photosensitive resin material to make a 3D printed pleating mold with an accuracy of ±0.05 mm through photocuring 3D printing, and using the 3D printed mold to assist pleating, so that the pleating effect has a fit greater than 98%.

[0045] Step S7, performing temperature adjustment finishing, surface functional coating treatment and biological enzyme finishing.

[0046] Step S7 also includes: Step S71: evenly attaching phase change material microcapsules to the surface of the fabric, the microcapsule particle size is 1.7 μm, and the loading amount is 9.5 g / m²; Step S72: using a spraying process to evenly apply the super-hydrophobic coating material on the surface of the fabric at a spraying amount of 0.27 g / cm², with a coating thickness of 60 μm, and applying the anti-ultraviolet coating material at a spraying amount of 0.18 g / cm²; Step S73: Bio-enzyme finishing, using a composite bio-enzyme composed of cellulase and protease in a mass ratio of 3:2, with an enzyme dosage of 1.8 g / L, treating the fabric for 37 minutes at a temperature of 44° C. and a pH value of 6.7 to remove impurities and hairiness on the surface of the fabric fibers.

[0047] Embodiment 4: The control group embodiment was prepared by adopting the traditional polyester fabric preparation process, without adding hydrophilic polymers, antibacterial polymers, degradable polymers and nano-modified materials, without bio-based bonding, weaving into a single-layer ordinary structure, pleating using a conventional hot pressing process, without temperature adjustment, surface functional coating and bio-enzyme finishing.

[0048] Embodiment 5, A novel modified polyester yarn pleated fabric is prepared by a novel modified polyester yarn pleated fabric preparation method. The performance of the novel modified polyester yarn pleated fabric is tested, and the indicators met include: In the pleating process, compared with the traditional pleating process, the energy consumption of production can be saved by 20%; Successfully realized the superposition application of tie-dye and pleating process, and produced the superposition products of tie-dye and pleating process; The prepared fabric is a functional product with the characteristics of moisture absorption and quick drying and skin-friendly softness. The moisture absorption and quick drying performance meets the requirements of medium and superior products, and the softness score is greater than 8 points.

[0049] The performance tests of the first, second, third and fourth embodiments include: The new modified polyester yarn pleated fabric prepared in Example 1 shows good energy-saving effect in the production process. Compared with the traditional process, the energy saving rate of production electricity is 22%. The tie-dyeing pleating process is successfully superimposed, and the color uniformity reaches 85%, indicating excellent process compatibility; in terms of functionality, the moisture absorption and quick-drying performance has steadily reached the medium and superior product standard, the fabric softness score is 8.2 points, and it feels comfortable; the antibacterial rate is as high as 99.2%, which can effectively resist bacterial growth, and the oil decomposition efficiency is 60%.

[0050] The new modified polyester yarn pleated fabric prepared in Example 2 has an energy saving rate of 24% in production electricity consumption, and the color uniformity after the tie-dyeing and pleating process is improved to 90%. The moisture absorption and quick-drying performance reaches the medium and superior quality, and the quick-drying time is shortened by 10% compared with Example 1, and the wearing experience is better; the softness score reaches 8.5 points, and the skin-friendliness is further improved; the antibacterial rate reaches 99.5%, and the self-cleaning oil decomposition efficiency reaches 65%.

[0051] The new modified polyester yarn pleated fabric prepared in Example 3 has an energy saving rate of 25% in production electricity consumption, a nearly perfect tie-dye pleating process, and a color uniformity of 92%; excellent moisture absorption and quick-drying performance, and the quick-drying time is shortened by 15% compared with Example 1; the softness score is increased to 8.8 points, and the touch is soft and delicate; the antibacterial rate reaches 99.7%, the oil decomposition efficiency reaches 70%, and the antibacterial and self-cleaning functions of the fabric are very prominent.

[0052] The control example adopts the traditional polyester fabric preparation process. The prepared fabric takes a very long time to dry after absorbing moisture, and the softness score is only 5 points. The fabric has no antibacterial and self-cleaning functions, is easily stained and breeds bacteria, and its durability is greatly reduced.

[0053] In summary, compared with the control group, Examples 1, 2 and 3 demonstrate that the new modified polyester yarn pleated fabric and its preparation method show significant advantages in energy saving, process compatibility, functionality and durability. The prepared fabric not only reduces production costs and improves production efficiency, but also meets consumers' demand for high-quality and multifunctional fabrics.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A method for preparing a novel modified polyester yarn pleated fabric, characterized in that: The preparation method of the novel modified polyester yarn pleated fabric comprises: Step S1, blending a hydrophilic polymer, an antibacterial polymer and a degradable polymer at high speed, adding a nano-modified material for ultrasonic dispersion treatment, and finally melt-blending and extruding and spinning through a twin-screw extruder to obtain a modified polyester yarn; Step S2, combining the bio-based material with the modified polyester yarn obtained in step S1 by a chemical method of graft copolymerization; Step S3, using modified polyester yarn, adopting a three-layer structure for three-dimensional weaving, controlling the twist and interweaving angle of each layer of yarn, and weaving a raw fabric; Step S4: Divide the key area and the general area according to the requirements of pleating and texture, set different warp yarn densities respectively, and adjust the weft yarn density synchronously; Step S5, performing laser pleating treatment to melt and reshape the fibers to form pleats; Step S6, first using an ultrasonic generator to cause the yarn to generate heat through friction to fix the wrinkle texture, and then using a 3D printing mold to assist in pleating; Step S7, performing temperature adjustment finishing, surface functional coating treatment and bio-enzyme finishing.

2. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S1 also includes: Step S11: weigh 62-74 parts of polyester resin, 11-17 parts of hydrophilic polymer, 7-14 parts of antibacterial polymer, 4-9 parts of degradable polymer, and 3-7 parts of nano-modified material; Step S12: high-speed blending, putting the hydrophilic polymer, the antibacterial polymer and the degradable polymer into a high-speed blender, setting the speed to 1200-1500 rpm, blending for 20-30 minutes, during which the temperature is controlled at 40°C-50°C by jacket water cooling, adding the nano-modified material after mixing evenly, and maintaining high-speed stirring for 5-10 minutes; Step S13: Ultrasonic dispersion and spinning, move the blend containing the nano-modified material to the ultrasonic equipment, set the frequency to 40kHz-50kHz, treat for 30-40 minutes, and then transport it to the twin-screw extruder, preheat each temperature zone to 230℃-250℃, start the extruder, control the screw speed at 300-350 rpm, and complete the melt blending extrusion spinning.

3. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S11 further includes: The hydrophilic polymer is prepared by blending polyethylene glycol and polyvinyl alcohol in a mass ratio of 3:2; the antibacterial polymer is a quaternary ammonium salt antibacterial polymer with a quaternary ammonium salt group content greater than 15%; the degradable polymer is prepared by compounding polylactic acid and polycaprolactone in a mass ratio of 1:1; the nano-modified material is a composite nanoparticle composed of nano-titanium dioxide and nano-silver in a mass ratio of 2:1; the nano-titanium dioxide particle size is 20-30nm, and the nano-silver particle size is 10-15nm.

4. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S2 also includes: Step S21: preparing 5 to 8 parts of a bio-based material, which is obtained by mixing cellulose extracted from flax fiber and protein extracted from soy protein in a mass ratio of 4:1; Step S22: graft copolymerization reaction, soaking the yarn obtained in step S1 in a reaction solution containing bio-based materials, an initiator and a catalyst, wherein the initiator is azobisisobutyronitrile, and the amount used is 0.5-1% of the total weight of the bio-based materials, and the solvent is a mixture of toluene and dimethylformamide, and the mixing ratio is 1:1, heating to 70°C-80°C, reacting for 3-4 hours, and continuously stirring; Step S23: After the reaction is completed, the yarn is washed to remove residual impurities and dried at 60°C-70°C.

5. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S3 also includes: Step S31: selecting a coarse-count modified polyester yarn with a twist of 40-50 twists / 10cm in the bottom layer, a fine-count modified polyester yarn with a medium twist of 30-40 twists / 10cm in the middle layer, and a nano-modified polyester yarn with a twist of 20-30 twists / 10cm in the top layer; Step S32: The yarns of each layer are interwoven at an interweaving angle of 45°-60° to weave a raw fabric with a thickness of 0.4mm-0.6mm and a gram weight of 150g / m²-200g / m².

6. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S4 also includes: Step S41: performing area division, where the area where pleats with a depth exceeding 3 mm need to be formed is the key area, and the rest is the common area; Step S42: Density adjustment is performed. The warp yarn density in the key area is set to 60-80 yarns / cm, the warp yarn density in the general area is set to 40-50 yarns / cm, and the weft yarn density is uniformly set to 30-40 yarns / cm.

7. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S5 also includes: Step S51: Select a laser device with a power of 300W-500W and a wavelength of 1064nm, write a laser heating program, and set the heating time to 0.5-1.0 seconds / point; Step S52: Start the laser device to locally heat the fabric, so that the polyester fiber of the fabric is melted and reshaped, so that the crease depth reaches 4mm-6mm, the crease clarity is greater than 95%, and the crease angle error is less than 2°.

8. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S6 also includes: Step S61: Use an ultrasonic generator with a frequency of 20kHz-30kHz to act on the fabric for 5-10 minutes, and set the pressure to 0.3MPa-0.5MPa; Step S62: using photosensitive resin material to make a 3D printed pleating mold with an accuracy of ±0.05 mm through photocuring 3D printing, and using the 3D printed mold to assist pleating, so that the pleating effect has a fit greater than 98%.

9. The method for preparing a novel modified polyester yarn pleated fabric according to claim 1, characterized in that: Step S7 also includes: Step S71: evenly attaching phase change material microcapsules to the surface of the fabric, the microcapsule particle size is 1μm-2μm, the loading amount is 8g / m²-10g / m², and the phase change temperature range of the phase change material is 20℃-30℃; Step S72: using a spraying process to uniformly apply the super hydrophobic coating material on the surface of the fabric at a spraying amount of 0.2g / cm²-0.3g / cm², with a coating thickness of 50μm-80μm, and applying the anti-ultraviolet coating material at a spraying amount of 0.1g / cm²-0.2g / cm²; Step S73: Bio-enzyme finishing, using a composite bio-enzyme composed of cellulase and protease in a mass ratio of 3:2, with an enzyme dosage of 1g / L-2g / L, treating the fabric for 30-40 minutes at a temperature of 40°C-50°C and a pH value of 6-7 to remove impurities and hairiness on the surface of the fabric fibers.

10. A new type of modified polyester yarn pleated fabric, characterized in that: The fabric is prepared by the method for preparing a novel modified polyester yarn pleated fabric as described in any one of claims 1 to 9.