Paper yarn fabric with continuous cool feeling and preparation method thereof

Abstract

The invention discloses a paper yarn fabric with continuous cool feeling and a preparation method thereof, and relates to the technical field of paper yarn fabric production.The preparation method comprises the steps that core spun yarn is taken according to the mass ratio of (6.9-7.1): (2.9-3.1), fine denier polyester filament yarn is lined in the core spun yarn, the density of the fabric is controlled to be 150-170 g / m < 2 >, and the fabric is obtained; the method comprises the following steps: taking a fabric, a moisture absorption and sweat releasing finishing agent and a xylitol cool feeling finishing agent according to a mass ratio of (95-105): (3-5): (4-6): (1400-1600) at the temperature of 90-100 DEG C, adding the materials into distilled water, and carrying out water bath for 20-30 minutes; and carrying out heat setting for 1-2 min at the temperature of 160-180 DEG C to obtain the paper yarn fabric. The hyperbranched modified boron nitride is used as a nano filler, and the boron nitride has excellent heat-conducting property, so that heat is conducted and dispersed to the whole fabric, heat accumulation is avoided, and continuous cool feeling is provided.

Description

Technical Field

[0001] This invention relates to the field of paper yarn fabric production technology, specifically a paper yarn fabric with a continuous cooling sensation and its preparation method. Background Technology

[0002] Paper yarn, made from natural plant fibers, is a type of yarn produced through paper spinning. When used in fabrics, it offers the following advantages: The plant fibers in paper yarn have a porous structure, which allows them to quickly absorb and expel sweat and moisture from the skin, evaporating it into the air. This provides excellent breathability and moisture wicking, keeping the fabric dry. Paper yarn fabric is made from natural plant fibers, which are soft, gentle and skin-friendly to the touch, and have high use value. The raw materials are green and natural, which are not only easy to recycle, but also conducive to sustainable green development.

[0003] To address the above problems, the present invention provides a paper yarn fabric with a continuous cooling sensation and a method for preparing the same. Summary of the Invention

[0004] The purpose of this invention is to provide a paper yarn fabric with a continuous cooling sensation and a method for preparing the same, in order to solve the problems raised in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: Step 1: Take bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquid, and cook them; wash with water, remove impurities, and pulp; add hyperbranched modified boron nitride, stir, add quaternary ammonium cationic corn starch, stir, and obtain bamboo pulp; Step 2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; take paper yarn base paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament, moisten it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn; Step 3: Take the core-spun yarn and insert fine denier polyester filaments to obtain the fabric; take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent and add them to distilled water, water bath, heat set to obtain paper yarn fabric.

[0006] A more optimized method for preparing hyperbranched boron nitride is as follows: add nano-boron nitride to isopropanol and disperse it by ultrasonication to obtain a boron nitride dispersion; add end-modified hyperbranched epoxy resin to N,N-dimethylformamide, mix evenly, slowly add it to the boron nitride dispersion, sonicate, stir for 1.5-2.5 h, centrifuge at 4500-5500 rpm for 10-20 min, and vacuum dry to obtain hyperbranched boron nitride.

[0007] A more optimized method for preparing quaternary ammonium cationic corn starch is as follows: Cationic corn starch, deionized water, dimethyl diallyl ammonium chloride, and cerium ammonium nitrate are mixed evenly and allowed to stand for 9-11 minutes; ultrasonication is carried out for 1.5-2.5 hours under ultrasonic power of 350-450W and temperature of 35-45℃, followed by washing with water, impurity removal, and vacuum drying to obtain quaternary ammonium cationic corn starch.

[0008] A more optimized method for preparing end-modified hyperbranched epoxy resin is as follows: hyperbranched epoxy resin is added to N,N-dimethylformamide and mixed evenly. Then, 1-pyrenic acid and tetrabutylammonium bromide are added. The mixture is reacted for 3-5 hours under a nitrogen atmosphere at a temperature of 95-105℃. After removing impurities, the mixture is vacuum dried to obtain end-modified hyperbranched epoxy resin.

[0009] A more optimized method for preparing cationic corn starch is as follows: potassium hydroxide is added to deionized water and mixed evenly to obtain a potassium hydroxide solution; corn starch is added to distilled water and mixed evenly; under ultrasonic power of 350-450W and temperature of 45-55℃, potassium hydroxide solution is added, dimethyl diallyl ammonium chloride is slowly added, ultrasonication is performed for 45-55 minutes, and the mixture is filtered, washed with alcohol, washed with water, filtered under vacuum, and dried to obtain cationic corn starch.

[0010] A more optimized method for preparing hyperbranched epoxy resin is as follows: 4,4'-(1-methylethylidene)bisphenol is added to N,N-dimethylformamide and mixed evenly. Trimethylolpropane triglycidyl ether and tetrabutylammonium bromide are then added. The mixture is reacted for 5-7 hours under a nitrogen atmosphere at a temperature of 95-105℃. After removing impurities, the mixture is dried under vacuum to obtain the hyperbranched epoxy resin.

[0011] The optimal mass ratio of paper yarn to polyester filament is (2.9-3.1):(1.9-2.1).

[0012] The optimal mass ratio of core-spun yarn to fine denier polyester filament is (6.9-7.1):(2.9-3.1).

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Preparation of hyperbranched modified boron nitride: Based on the A2+B3 polymerization principle, the phenolic hydroxyl group of 4,4'-(1-methylethylidene)bisphenol and the epoxy group of trimethylolpropane triglycidyl ether undergo a ring-opening addition reaction to form a hyperbranched epoxy resin. The epoxy group of the hyperbranched epoxy resin and the carboxyl group of 1-pyrene carboxylic acid react under the catalysis of tetrabutylammonium bromide to form an ester bond, introducing a pyrene group to obtain a terminal-modified hyperbranched epoxy resin. The terminal-modified hyperbranched epoxy resin is physically adsorbed onto boron nitride nanoparticles through π-π stacking. On the one hand, the terminal-modified hyperbranched epoxy resin inhibits the aggregation of boron nitride nanoparticles through steric hindrance, promoting dispersion. On the other hand, compared with boron nitride nanoparticles, the hyperbranched epoxy resin has higher compatibility with the fiber matrix of paper yarn, improving the interfacial bonding strength between boron nitride nanoparticles and fibers. Hyperbranched boron nitride is used as a nanofiller. Boron nitride has excellent thermal conductivity and mechanical strength, which conducts and disperses heat to the entire fabric, avoids heat accumulation, reduces local thermal stress, provides a continuous cooling sensation, and avoids horizontal rolling caused by uneven heat shrinkage and insufficient mechanical strength.

[0014] 2. Preparation of quaternary ammonium cationic corn starch: Dimethyl diallyl ammonium chloride and the hydroxyl groups of corn starch undergo an etherification reaction to obtain cationic corn starch; Cerium ammonium nitrate is used as an initiator, and dimethyl diallyl ammonium chloride and cationic corn starch undergo free radical graft copolymerization, followed by ultrasonication to obtain quaternary ammonium cationic corn starch; Quaternary ammonium cationic corn starch bridges fibers and fillers through electrostatic interaction, improving the bonding strength and distribution uniformity between fibers and between fibers and fillers, thereby improving the strength and flexibility of paper yarn and avoiding warping caused by uneven fiber distribution and insufficient yarn strength.

[0015] 3. To prepare core-spun yarn, polyester filament is used as the core material, and paper yarn is used to wrap the polyester filament to obtain core-spun yarn. On the one hand, paper yarn has low strength, and its flexibility and strength are insufficient as a fabric, making it easy to break. Polyester filament has high tensile strength, flexibility and abrasion resistance, which improves the tensile performance of core-spun yarn. On the other hand, paper yarn has the excellent moisture absorption and breathability of plant fibers, has a natural cooling sensation, and has a better sensory effect when in direct contact with the skin.

[0016] 4. To prepare paper yarn fabric, the weft plain needle loop structure gives the fabric excellent elasticity and breathability, and a cooler feel. The core-spun yarn is lined with fine denier polyester filaments. On the one hand, fine denier polyester filaments have excellent strength, dimensional stability, abrasion resistance and wrinkle resistance, which improves the smoothness of the fabric and prevents horizontal striping. On the other hand, the fine denier filaments are finer, and with the addition of moisture-wicking finishing agents, the fabric is modified to be more hydrophilic, and moisture-wicking pathways are constructed. Furthermore, through capillary action, sweat is transferred from the skin-friendly inner side to the outer side of the fabric, which has one-way moisture-wicking properties. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The sources and types of substances involved in this invention are not particularly limited, and exemplary examples include: The product code for 4,4'-(1-methylethylidene)bisphenol is S30294-500g, provided by Shanghai Yuanye Biotechnology Co., Ltd. Trimethylolpropane triglycidyl ether, catalog number S64328-100g, is provided by Shanghai Yuanye Biotechnology Co., Ltd. 1-Pyrenic acid, catalog number Y30143-5g, was supplied by Shanghai Yuanye Biotechnology Co., Ltd. The nano boron nitride, with the product code XH-BN-100, is supplied by Shanghai Xiaohuang Nanotechnology Co., Ltd. The corn starch, product number 22225, was supplied by Suzhou Senfida Chemical Co., Ltd. Dimethyl diallyl ammonium chloride, item number 30124, is supplied by Jiangsu Congzhong Chemical Co., Ltd. The cerium ammonium nitrate, with product number 11114, was supplied by Jinan Dehou Chemical Co., Ltd. The bamboo, with product number 025-32148, was provided by Mengzong Nursery Base in Xiaochang County; The polyester filament, part number 75D, is supplied by Zhejiang Huilong New Material Co., Ltd. The fine denier polyester filament, designated ZS-1, is supplied by Shaoxing Xineng Textile Technology Co., Ltd. The moisture-wicking finishing agent, with product number FERAN ICC, is provided by Shanghai Green Copper Materials Co., Ltd. The xylitol cooling finishing agent, with the product code ICEMAN COOL, is provided by Zhejiang Fupusheng New Material Co., Ltd. Example 1: A method for preparing a paper yarn fabric with a continuous cooling sensation; Step 1: Preparation of hyperbranched modified boron nitride S1: Take 7.13g of 4,4'-(1-methylethylidene)bisphenol and add it to 20mL of N,N-dimethylformamide. Mix well, add 36.28g of trimethylolpropane triglycidyl ether and 1.93g of tetrabutylammonium bromide. React for 5h under nitrogen atmosphere and temperature of 95℃. Remove impurities and dry under vacuum to obtain hyperbranched epoxy resin. S2: Take 10g of hyperbranched epoxy resin and add it to 20mL of N,N-dimethylformamide. Mix well, add 1.36g of 1-pyrenic acid and 0.1g of tetrabutylammonium bromide. Under nitrogen atmosphere and at a temperature of 95℃, react for 3h. Remove impurities and dry under vacuum to obtain end-modified hyperbranched epoxy resin. S3: Take 2g of nano boron nitride and add it to 600mL of isopropanol. Disperse it by ultrasonication to obtain a boron nitride dispersion. Take 1g of end-modified hyperbranched epoxy resin and add it to 50mL of N,N-dimethylformamide. Mix it evenly and slowly add it to the boron nitride dispersion. Sonicate and stir for 1.5h. Centrifuge at 4500rpm for 10min and vacuum dry to obtain hyperbranched modified boron nitride. Step 2: Preparation of Quaternary Ammonium Cationic Corn Starch S1: Add 45g of potassium hydroxide to 55mL of deionized water and mix well to obtain a potassium hydroxide solution; add 10g of corn starch to 150mL of distilled water and mix well. Under the conditions of ultrasonic power 350W and temperature 45℃, add 20mL of potassium hydroxide solution, slowly add 9.3g of dimethyl diallyl ammonium chloride, sonicate for 45min, filter, wash with alcohol, wash with water, filter under vacuum, and dry to obtain cationic corn starch; S2: Take 10g cationic corn starch, 150mL deionized water, 5g dimethyl diallyl ammonium chloride, and 0.5g cerium ammonium nitrate, mix them evenly, and let them stand for 9min; under the conditions of ultrasonic power 350W and temperature 35℃, sonicate for 1.5h, wash with water, remove impurities, and vacuum dry to obtain quaternary ammonium cationic corn starch. Step 3: Prepare core-spun yarn S1: Take moso bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:22, the degree of sulfidation to be 25, and the mass ratio of bamboo strips to cooking liquor to be 1:3, raise the temperature to 150℃ at a heating rate of 65℃ / h, and cook at 150℃ for 1.5h; wash with water to remove impurities, control the beating degree to be 42ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add hyperbranched modified boron nitride, stir for 40min, add quaternary ammonium cationic corn starch, stir for 20min to obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament at a mass ratio of 2.9:2.1, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn; Step 4: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 6.9:3.1, insert fine denier polyester filament, and control the fabric density to 150g / m².2 To obtain the fabric; S2: At a temperature of 90℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 95:5:6:1600 and add them to distilled water. Incubate in a water bath for 20 minutes. Heat set at a temperature of 160℃ for 1 minute to obtain the paper yarn fabric.

[0019] Example 2: A method for preparing a paper yarn fabric with a continuous cooling sensation; Step 1: Preparation of hyperbranched modified boron nitride S1: Take 7.13g of 4,4'-(1-methylethylidene)bisphenol and add it to 20mL of N,N-dimethylformamide. Mix well, add 36.28g of trimethylolpropane triglycidyl ether and 1.93g of tetrabutylammonium bromide. Under a nitrogen atmosphere and at a temperature of 100℃, react for 6h. Remove impurities and dry under vacuum to obtain hyperbranched epoxy resin. S2: Take 10g of hyperbranched epoxy resin and add it to 20mL of N,N-dimethylformamide. Mix well, add 1.36g of 1-pyrenic acid and 0.15g of tetrabutylammonium bromide. Under nitrogen atmosphere and at 100℃, react for 4h. Remove impurities and dry under vacuum to obtain end-modified hyperbranched epoxy resin. S3: Take 2g of nano boron nitride and add it to 600mL of isopropanol. Disperse it by ultrasonication to obtain boron nitride dispersion. Take 1g of end-modified hyperbranched epoxy resin and add it to 50mL of N,N-dimethylformamide. Mix it evenly and slowly add it to the boron nitride dispersion. Sonicate and stir for 2h. Centrifuge at 5000rpm for 15min and vacuum dry to obtain hyperbranched modified boron nitride. Step 2: Preparation of Quaternary Ammonium Cationic Corn Starch S1: Add 45g of potassium hydroxide to 55mL of deionized water and mix well to obtain a potassium hydroxide solution; add 10g of corn starch to 150mL of distilled water and mix well. Under the conditions of ultrasonic power 400W and temperature 50℃, add 20mL of potassium hydroxide solution, slowly add 9.3g of dimethyl diallyl ammonium chloride, sonicate for 50min, filter, wash with alcohol, wash with water, filter under vacuum, and dry to obtain cationic corn starch; S2: Take 10g cationic corn starch, 150mL deionized water, 5g dimethyl diallyl ammonium chloride, and 0.5g cerium ammonium nitrate, mix them evenly, and let them stand for 10min; under the conditions of ultrasonic power 400W and temperature 40℃, sonicate for 2h, wash with water, remove impurities, and vacuum dry to obtain quaternary ammonium cationic corn starch. Step 3: Prepare core-spun yarn S1: Take moso bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:23, the degree of sulfidation to be 26, and the mass ratio of bamboo strips to cooking liquor to be 1:4, raise the temperature to 155℃ at a heating rate of 65℃ / h, and cook at 155℃ for 2h; wash with water to remove impurities, control the beating degree to be 43ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add hyperbranched modified boron nitride, stir for 45min, add quaternary ammonium cationic corn starch, stir for 25min to obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament at a mass ratio of 3:2, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn. Step 4: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 7:3, insert fine denier polyester filament, and control the fabric density to 160g / m². 2 To obtain the fabric; S2: At a temperature of 95℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 100:4:6:1500 and add them to distilled water. Incubate in a water bath for 25 minutes. Heat set at a temperature of 170℃ for 1.5 minutes to obtain the paper yarn fabric.

[0020] Example 3: A method for preparing a paper yarn fabric with a continuous cooling sensation; Step 1: Preparation of hyperbranched modified boron nitride S1: Take 7.13g of 4,4'-(1-methylethylidene)bisphenol and add it to 20mL of N,N-dimethylformamide. Mix well, add 36.28g of trimethylolpropane triglycidyl ether and 1.93g of tetrabutylammonium bromide. Under a nitrogen atmosphere and at a temperature of 105℃, react for 7h. Remove impurities and dry under vacuum to obtain hyperbranched epoxy resin. S2: Take 10g of hyperbranched epoxy resin and add it to 20mL of N,N-dimethylformamide. Mix well, add 1.36g of 1-pyrenic acid and 0.2g of tetrabutylammonium bromide. Under nitrogen atmosphere and temperature of 105℃, react for 5h, remove impurities, and vacuum dry to obtain end-modified hyperbranched epoxy resin. S3: Take 2g of nano boron nitride and add it to 600mL of isopropanol. Disperse it by ultrasonication to obtain a boron nitride dispersion. Take 1g of end-modified hyperbranched epoxy resin and add it to 50mL of N,N-dimethylformamide. Mix it evenly and slowly add it to the boron nitride dispersion. Sonicate and stir for 2.5h. Centrifuge at 5500rpm for 20min and vacuum dry to obtain hyperbranched modified boron nitride. Step 2: Preparation of Quaternary Ammonium Cationic Corn Starch S1: Add 45g of potassium hydroxide to 55mL of deionized water and mix well to obtain a potassium hydroxide solution; add 10g of corn starch to 150mL of distilled water and mix well. Under the conditions of ultrasonic power 450W and temperature 55℃, add 20mL of potassium hydroxide solution, slowly add 9.3g of dimethyl diallyl ammonium chloride, sonicate for 55min, filter, wash with alcohol, wash with water, filter under vacuum, and dry to obtain cationic corn starch; S2: Take 10g cationic corn starch, 150mL deionized water, 5g dimethyl diallyl ammonium chloride, and 0.5g cerium ammonium nitrate, mix them evenly, and let them stand for 11min; under the conditions of ultrasonic power 450W and temperature 45℃, sonicate for 2.5h, wash with water, remove impurities, and vacuum dry to obtain quaternary ammonium cationic corn starch. Step 3: Prepare core-spun yarn S1: Take moso bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:24, the degree of sulfidation to be 27, and the mass ratio of bamboo strips to cooking liquor to be 1:5, raise the temperature to 160℃ at a heating rate of 65℃ / h, and cook at 160℃ for 2.5h; wash with water to remove impurities, control the beating degree to be 44ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add hyperbranched modified boron nitride, stir for 50min, add quaternary ammonium cationic corn starch, stir for 30min, and obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament at a mass ratio of 3.1:1.9, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn; Step 4: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 7.1:2.9, insert fine denier polyester filament, and control the fabric density to 170g / m². 2 To obtain the fabric; S2: At a temperature of 100℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 105:3:4:1400 and add them to distilled water. Incubate in a water bath for 30 minutes. Heat set at a temperature of 180℃ for 2 minutes to obtain the paper yarn fabric.

[0021] Comparative Example 1: Boron nitride without hyperbranching modification was not added; otherwise, refer to Example 2. Step 1: Preparation of Quaternary Ammonium Cationic Corn Starch S1: Add 45g of potassium hydroxide to 55mL of deionized water and mix well to obtain a potassium hydroxide solution; add 10g of corn starch to 150mL of distilled water and mix well. Under the conditions of ultrasonic power 400W and temperature 50℃, add 20mL of potassium hydroxide solution, slowly add 9.3g of dimethyl diallyl ammonium chloride, sonicate for 50min, filter, wash with alcohol, wash with water, filter under vacuum, and dry to obtain cationic corn starch; S2: Take 10g cationic corn starch, 150mL deionized water, 5g dimethyl diallyl ammonium chloride, and 0.5g cerium ammonium nitrate, mix them evenly, and let them stand for 10min; under the conditions of ultrasonic power 400W and temperature 40℃, sonicate for 2h, wash with water, remove impurities, and vacuum dry to obtain quaternary ammonium cationic corn starch. Step 2: Preparation of core-spun yarn S1: Take bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:23, the degree of sulfidation to be 26, and the mass ratio of bamboo strips to cooking liquor to be 1:4, raise the temperature to 155℃ at a heating rate of 65℃ / h, and cook at 155℃ for 2h; wash with water to remove impurities, control the beating degree to be 43ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add quaternary ammonium cationic corn starch and stir for 25min to obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament at a mass ratio of 3:2, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn. Step 3: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 7:3, insert fine denier polyester filament, and control the fabric density to 160g / m². 2 To obtain the fabric; S2: At a temperature of 95℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 100:4:6:1500 and add them to distilled water. Incubate in a water bath for 25 minutes. Heat set at a temperature of 170℃ for 1.5 minutes to obtain the paper yarn fabric.

[0022] Comparative Example 2: Corn starch without quaternary ammonium cationic starch was used; otherwise, refer to Example 2. Step 1: Preparation of hyperbranched modified boron nitride S1: Take 7.13g of 4,4'-(1-methylethylidene)bisphenol and add it to 20mL of N,N-dimethylformamide. Mix well, add 36.28g of trimethylolpropane triglycidyl ether and 1.93g of tetrabutylammonium bromide. Under a nitrogen atmosphere and at a temperature of 100℃, react for 6h. Remove impurities and dry under vacuum to obtain hyperbranched epoxy resin. S2: Take 10g of hyperbranched epoxy resin and add it to 20mL of N,N-dimethylformamide. Mix well, add 1.36g of 1-pyrenic acid and 0.15g of tetrabutylammonium bromide. Under nitrogen atmosphere and at 100℃, react for 4h. Remove impurities and dry under vacuum to obtain end-modified hyperbranched epoxy resin. S3: Take 2g of nano boron nitride and add it to 600mL of isopropanol. Disperse it by ultrasonication to obtain boron nitride dispersion. Take 1g of end-modified hyperbranched epoxy resin and add it to 50mL of N,N-dimethylformamide. Mix it evenly and slowly add it to the boron nitride dispersion. Sonicate and stir for 2h. Centrifuge at 5000rpm for 15min and vacuum dry to obtain hyperbranched modified boron nitride. Step 2: Preparation of core-spun yarn S1: Take moso bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:23, the degree of sulfidation to be 26, and the mass ratio of bamboo strips to cooking liquor to be 1:4, raise the temperature to 155℃ at a heating rate of 65℃ / h, and cook at 155℃ for 2h; wash with water to remove impurities, control the degree of beating to be 43ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add hyperbranched modified boron nitride, stir for 45min to obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament at a mass ratio of 3:2, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn. Step 3: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 7:3, insert fine denier polyester filament, and control the fabric density to 160g / m². 2 To obtain the fabric; S2: At a temperature of 95℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 100:4:6:1500 and add them to distilled water. Incubate in a water bath for 25 minutes. Heat set at a temperature of 170℃ for 1.5 minutes to obtain the paper yarn fabric.

[0023] Comparative Example 3: No polyester filament was added; otherwise, refer to Example 2. Step 1: Preparation of hyperbranched modified boron nitride S1: Take 7.13g of 4,4'-(1-methylethylidene)bisphenol and add it to 20mL of N,N-dimethylformamide. Mix well, add 36.28g of trimethylolpropane triglycidyl ether and 1.93g of tetrabutylammonium bromide. Under a nitrogen atmosphere and at a temperature of 100℃, react for 6h. Remove impurities and dry under vacuum to obtain hyperbranched epoxy resin. S2: Take 10g of hyperbranched epoxy resin and add it to 20mL of N,N-dimethylformamide. Mix well, add 1.36g of 1-pyrenic acid and 0.15g of tetrabutylammonium bromide. Under nitrogen atmosphere and at 100℃, react for 4h. Remove impurities and dry under vacuum to obtain end-modified hyperbranched epoxy resin. S3: Take 2g of nano boron nitride and add it to 600mL of isopropanol. Disperse it by ultrasonication to obtain boron nitride dispersion. Take 1g of end-modified hyperbranched epoxy resin and add it to 50mL of N,N-dimethylformamide. Mix it evenly and slowly add it to the boron nitride dispersion. Sonicate and stir for 2h. Centrifuge at 5000rpm for 15min and vacuum dry to obtain hyperbranched modified boron nitride. Step 2: Preparation of Quaternary Ammonium Cationic Corn Starch S1: Add 45g of potassium hydroxide to 55mL of deionized water and mix well to obtain a potassium hydroxide solution; add 10g of corn starch to 150mL of distilled water and mix well. Under the conditions of ultrasonic power 400W and temperature 50℃, add 20mL of potassium hydroxide solution, slowly add 9.3g of dimethyl diallyl ammonium chloride, sonicate for 50min, filter, wash with alcohol, wash with water, filter under vacuum, and dry to obtain cationic corn starch; S2: Take 10g cationic corn starch, 150mL deionized water, 5g dimethyl diallyl ammonium chloride, and 0.5g cerium ammonium nitrate, mix them evenly, and let them stand for 10min; under the conditions of ultrasonic power 400W and temperature 40℃, sonicate for 2h, wash with water, remove impurities, and vacuum dry to obtain quaternary ammonium cationic corn starch. Step 3: Prepare core-spun yarn S1: Take moso bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:23, the degree of sulfidation to be 26, and the mass ratio of bamboo strips to cooking liquor to be 1:4, raise the temperature to 155℃ at a heating rate of 65℃ / h, and cook at 155℃ for 2h; wash with water to remove impurities, control the beating degree to be 43ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add hyperbranched modified boron nitride, stir for 45min, add quaternary ammonium cationic corn starch, stir for 25min to obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and paper yarn at a mass ratio of 3:2, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn; Step 4: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 7:3, insert fine denier polyester filament, and control the fabric density to 160g / m². 2 To obtain the fabric; S2: At a temperature of 95℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 100:4:6:1500 and add them to distilled water. Incubate in a water bath for 25 minutes. Heat set at a temperature of 170℃ for 1.5 minutes to obtain the paper yarn fabric.

[0024] Comparative Example 4: Nano-boron nitride was not hyperbranched, and the rest was the same as in Example 2; Step 1: Preparation of Quaternary Ammonium Cationic Corn Starch S1: Add 45g of potassium hydroxide to 55mL of deionized water and mix well to obtain a potassium hydroxide solution; add 10g of corn starch to 150mL of distilled water and mix well. Under the conditions of ultrasonic power 400W and temperature 50℃, add 20mL of potassium hydroxide solution, slowly add 9.3g of dimethyl diallyl ammonium chloride, sonicate for 50min, filter, wash with alcohol, wash with water, filter under vacuum, and dry to obtain cationic corn starch; S2: Take 10g cationic corn starch, 150mL deionized water, 5g dimethyl diallyl ammonium chloride, and 0.5g cerium ammonium nitrate, mix them evenly, and let them stand for 10min; under the conditions of ultrasonic power 400W and temperature 40℃, sonicate for 2h, wash with water, remove impurities, and vacuum dry to obtain quaternary ammonium cationic corn starch. Step 2: Preparation of core-spun yarn S1: Take moso bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:23, the degree of sulfidation to be 26, and the mass ratio of bamboo strips to cooking liquor to be 1:4, raise the temperature to 155℃ at a heating rate of 65℃ / h, and cook at 155℃ for 2h; wash with water to remove impurities, control the beating degree to be 43ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add nano boron nitride, stir for 45min, add quaternary ammonium cationic corn starch, stir for 25min to obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament at a mass ratio of 3:2, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn. Step 3: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 7:3, insert fine denier polyester filament, and control the fabric density to 160g / m². 2 To obtain the fabric; S2: At a temperature of 95℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 100:4:6:1500 and add them to distilled water. Incubate in a water bath for 25 minutes. Heat set at a temperature of 170℃ for 1.5 minutes to obtain the paper yarn fabric.

[0025] Comparative Example 5: No fine denier polyester filament was added; otherwise, refer to Example 2. Step 1: Preparation of hyperbranched modified boron nitride S1: Take 7.13g of 4,4'-(1-methylethylidene)bisphenol and add it to 20mL of N,N-dimethylformamide. Mix well, add 36.28g of trimethylolpropane triglycidyl ether and 1.93g of tetrabutylammonium bromide. Under a nitrogen atmosphere and at a temperature of 100℃, react for 6h. Remove impurities and dry under vacuum to obtain hyperbranched epoxy resin. S2: Take 10g of hyperbranched epoxy resin and add it to 20mL of N,N-dimethylformamide. Mix well, add 1.36g of 1-pyrenic acid and 0.15g of tetrabutylammonium bromide. Under nitrogen atmosphere and at 100℃, react for 4h. Remove impurities and dry under vacuum to obtain end-modified hyperbranched epoxy resin. S3: Take 2g of nano boron nitride and add it to 600mL of isopropanol. Disperse it by ultrasonication to obtain boron nitride dispersion. Take 1g of end-modified hyperbranched epoxy resin and add it to 50mL of N,N-dimethylformamide. Mix it evenly and slowly add it to the boron nitride dispersion. Sonicate and stir for 2h. Centrifuge at 5000rpm for 15min and vacuum dry to obtain hyperbranched modified boron nitride. Step 2: Preparation of Quaternary Ammonium Cationic Corn Starch S1: Add 45g of potassium hydroxide to 55mL of deionized water and mix well to obtain a potassium hydroxide solution; add 10g of corn starch to 150mL of distilled water and mix well. Under the conditions of ultrasonic power 400W and temperature 50℃, add 20mL of potassium hydroxide solution, slowly add 9.3g of dimethyl diallyl ammonium chloride, sonicate for 50min, filter, wash with alcohol, wash with water, filter under vacuum, and dry to obtain cationic corn starch; S2: Take 10g cationic corn starch, 150mL deionized water, 5g dimethyl diallyl ammonium chloride, and 0.5g cerium ammonium nitrate, mix them evenly, and let them stand for 10min; under the conditions of ultrasonic power 400W and temperature 40℃, sonicate for 2h, wash with water, remove impurities, and vacuum dry to obtain quaternary ammonium cationic corn starch. Step 3: Prepare core-spun yarn S1: Take moso bamboo, cut and crush it to obtain bamboo strips; take bamboo strips and cooking liquor, control the mass ratio of bamboo strips to sodium hydroxide to be 100:23, the degree of sulfidation to be 26, and the mass ratio of bamboo strips to cooking liquor to be 1:4, raise the temperature to 155℃ at a heating rate of 65℃ / h, and cook at 155℃ for 2h; wash with water to remove impurities, control the beating degree to be 43ºSR at a rotation speed of 800rpm and a beating concentration of 4%, and beating for 20min; add hyperbranched modified boron nitride, stir for 45min, add quaternary ammonium cationic corn starch, stir for 25min to obtain bamboo pulp; S2: Take bamboo pulp, form it into shape, press and dehydrate it, and dry it to obtain paper yarn base paper; S3: Take paper yarn raw paper, cut it, twist it to obtain paper yarn; take paper yarn and polyester filament at a mass ratio of 3:2, wet it, clean and comb it, draw it, roving it, and spinning it to obtain core-spun yarn. Step 4: Prepare paper yarn fabric S1: Take core-spun yarn at a mass ratio of 7:3, insert the core-spun yarn, and control the fabric density to 160g / m². 2 To obtain the fabric; S2: At a temperature of 95℃, take the fabric, moisture-wicking finishing agent, and xylitol cooling finishing agent in a mass ratio of 100:4:6:1500 and add them to distilled water. Incubate in a water bath for 25 minutes. Heat set at a temperature of 170℃ for 1.5 minutes to obtain the paper yarn fabric.

[0026] experiment: The paper yarn fabrics and core-spun yarns prepared in Examples 1-3 and Comparative Examples 1-5 were subjected to performance testing. (1) Instantaneous cooling performance test Take paper yarn fabric and perform the test and evaluation of the instantaneous cooling performance of textiles in contact with the standard GB / T35263-2017. Use YG606D flat-panel fabric heat preservation instrument to measure the heat preservation rate, thermal conductivity and clo value, and calculate the instantaneous cooling heat flow of the fabric. (2) Tensile property test Take core-spun yarn and perform the test according to GB / T3916-2013 "Determination of breaking strength and elongation at break of single yarn in packaged textiles". Use YG021DL electronic single yarn strength tester to determine the breaking strength and elongation at break. The data obtained from the above experiment are shown in Table 1 below: Table 1 Conclusion: Based on the analysis of the above experimental data, the paper yarn fabrics prepared in Examples 1-3 exhibit higher instantaneous cooling heat flux, superior contact cooling performance, and significant sustained cooling effect; the core-spun yarn has higher breaking strength and elongation at break, excellent tensile properties, wear resistance, wrinkle resistance, and a long service life. In contrast, the paper yarn fabrics prepared in Comparative Examples 1-5 have lower instantaneous cooling heat flux, poor contact cooling performance, and insignificant sustained cooling effect; the core-spun yarn has lower breaking strength and elongation at break, poor tensile properties, and a short service life.

[0027] Comparative analysis of Comparative Example 1 (without hyperbranched boron nitride) and Example 2 shows that hyperbranched boron nitride, as a nanofiller, has excellent thermal conductivity, which conducts and disperses heat throughout the fabric, preventing heat accumulation and providing a continuous cooling sensation.

[0028] Comparative analysis of Comparative Example 2 (without quaternary ammonium cationic corn starch) and Example 2 shows that quaternary ammonium cationic corn starch bridges fibers and fillers through electrostatic interaction, improving the bonding strength between fibers and between fibers and fillers, thereby increasing the strength and flexibility of paper yarn.

[0029] Comparative analysis of Comparative Example 3 (without polyester filament) and Example 2 shows that the paper yarn has low strength, insufficient flexibility and strength as a fabric, and is easily damaged. Polyester filament has high tensile strength, flexibility and abrasion resistance, which improves the tensile performance of core-spun yarn.

[0030] Comparative analysis of Comparative Example 4 (without hyperbranching modification) and Example 2 shows that the end-modified hyperbranched epoxy resin is physically adsorbed onto the boron nitride nanoparticles through the π-π stacking effect. On the one hand, the end-modified hyperbranched epoxy resin inhibits the aggregation of boron nitride nanoparticles through steric hindrance, promoting dispersion. On the other hand, compared with boron nitride nanoparticles, the hyperbranched epoxy resin has higher compatibility with the fiber matrix of paper yarn, improving the interfacial bonding strength between boron nitride nanoparticles and fibers.

[0031] Comparative analysis of Comparative Example 5 (without fine denier polyester filament) and Example 2 shows that when fine denier polyester filament is incorporated into the core-spun yarn, on the one hand, the fine denier polyester filament has excellent strength, dimensional stability, abrasion resistance, and wrinkle resistance, improving the smoothness of the fabric and preventing horizontal striping; on the other hand, the fine denier filament is finer, and the addition of a moisture-wicking finishing agent modifies the fabric's hydrophilicity, constructing a moisture-wicking path, and further transferring sweat from the skin-friendly inner side to the outer side of the fabric through capillary action, exhibiting one-way moisture-wicking properties.

[0032] 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 invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A process for the preparation of a paper yarn fabric having a lasting cool feel, characterized by: The method comprises the following steps: Step one: take bamboo, cut, crush, get bamboo chips; take bamboo chips, cooking liquid, cook; Wash, remove impurities, beat pulp; add hyperbranched modified boron nitride, stir, add quaternary ammonium cation corn starch, stir, get bamboo pulp; Step two: take bamboo pulp, copy into shape, press dewatering, drying, get paper yarn base paper; take paper yarn base paper, slitting, twisting, get paper yarn; take paper yarn and polyester filament, wet, carding, drawing, roving, spinning, get core-spun yarn; Step three: take core-spun yarn, insert fine denier polyester filament, get fabric; take fabric, moisture absorption and sweat finishing agent, xylitol cool finishing agent, add distilled water, water bath, heat setting, get paper yarn fabric.

2. A process for the preparation of paper voile fabric with sustained coolness as claimed in claim 1 wherein: The preparation method of the hyperbranched modified boron nitride is: take nano boron nitride and add it into isopropyl alcohol, ultrasonic dispersion, get boron nitride dispersion liquid; take end-modified hyperbranched epoxy resin, add it into N,N-dimethylformamide, mix evenly, slowly add boron nitride dispersion liquid, ultrasonic, stir for 1.5-2.5h, centrifugal under the condition of 4500-5500rpm for 10-20min, vacuum drying, get hyperbranched modified boron nitride.

3. A process for the preparation of paper voile fabric with sustained coolness as claimed in claim 1 wherein: The preparation method of the quaternary ammonium cation corn starch is: take cationic corn starch, deionized water, dimethyl diallyl ammonium chloride, cerium nitrate, mix evenly, stand for 9-11min; ultrasonic under the condition of ultrasonic power 350-450W, temperature 35-45℃ for 1.5-2.5h, wash, remove impurities, vacuum drying, get quaternary ammonium cation corn starch.

4. A process for the preparation of paper voile fabric with sustained coolness as claimed in claim 2 wherein: The preparation method of the end-modified hyperbranched epoxy resin is: take hyperbranched epoxy resin, add it into N,N-dimethylformamide, mix evenly, add 1-pyrene carboxylic acid, tetrabutyl ammonium bromide, react under the condition of nitrogen atmosphere, temperature 95-105℃ for 3-5h, remove impurities, vacuum drying, get end-modified hyperbranched epoxy resin.

5. A process for the preparation of paper voile fabric with sustained coolness as claimed in claim 3 wherein: The preparation method of the cationic corn starch is: take potassium hydroxide, add it into deionized water, mix evenly, get potassium hydroxide solution; take corn starch, add it into distilled water, mix evenly, add potassium hydroxide solution under the condition of ultrasonic power 350-450W, temperature 45-55℃, slowly add dimethyl diallyl ammonium chloride, ultrasonic for 45-55min, filter, alcohol wash, water wash, suction filtration, oven drying, get cationic corn starch.

6. A process for the preparation of paper voile fabric with sustained coolness as claimed in claim 4 wherein: The preparation method of the hyperbranched epoxy resin is: take 4,4'-(1-methylethylene) bisphenol, add it into N,N-dimethylformamide, mix evenly, add trimethylolpropane triglycidyl ether, tetrabutyl ammonium bromide, react under the condition of nitrogen atmosphere, temperature 95-105℃ for 5-7h, remove impurities, vacuum drying, get hyperbranched epoxy resin.

7. A process for the preparation of paper voile fabric with sustained coolness as claimed in claim 1 wherein: The mass ratio of the paper yarn and polyester filament is (2.9-3.1):(1.9-2.1).

8. A process for the preparation of paper voile fabric with sustained coolness as claimed in claim 1 wherein: The mass ratio of the core-spun yarn and fine denier polyester filament is (6.9-7.1):(2.9-3.1).

9. A paper voile fabric having a sustained cool feel prepared according to the method of any one of claims 1-8.

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