Tear-resistant clothing fabric and weaving method thereof

Abstract

The present invention belongs to the technical field of fabric preparation, and particularly relates to a tear-resistant clothing fabric and a weaving method thereof. PBO fibers are modified with epoxy resin to obtain modified PBO fibers, nylon fibers are modified with alkylamine grafted montmorillonite to obtain modified nylon fibers, and cotton fibers are modified with organosiloxane to obtain organosilicon-modified cotton fibers. The modified nylon fibers and polyester fibers are twisted to form warp yarns. The modified PBO fibers and organosilicon-modified cotton fibers are twisted to form weft yarns. The warp yarns and weft yarns are woven to obtain clothing fabrics with good wear resistance and tear resistance.

Description

Technical Field

[0001] The invention relates to the technical field of fabric preparation, and in particular to a tear-resistant clothing fabric and a weaving method thereof. Background Art

[0002] With the rise of industrialization, textiles no longer exist solely for their practical use. Different industries have varying demands for textiles, leading to the emergence of functional textiles. With the rise of outdoor sports culture, the research and development of outdoor sportswear has become a hot topic. While there are no essential differences between outdoor sportswear and homewear, the characteristics of outdoor activities and sports necessitate excellent heat dissipation, breathability, and moisture permeability. Outdoor activities, such as wind, rain, snow, fog, dust, and dirt, require clothing to be waterproof, stain-resistant, antibacterial, and odor-resistant. Rock climbing, on the other hand, requires clothing to exhibit excellent stretch resistance, tear resistance, and abrasion resistance.

[0003] The Chinese patent publication number CN118745620A discloses a lightweight tear-resistant fabric based on a bulletproof component and its preparation method. The lightweight tear-resistant fabric is woven with nylon 66 masterbatch yarn as the warp yarn and ultra-high molecular weight polyethylene masterbatch yarn as the weft yarn. The fabric is made by blending ultra-high molecular weight polyethylene fiber with nylon 66. With the low density and high strength of ultra-high molecular weight polyethylene, the fabric has both lightness, tear resistance and wear resistance. In addition, a vibration drafting link is added during the preparation of the fabric to promote melting. After spinning, the internal stress between fibers is released, ensuring fiber strength and, in turn, the mechanical properties of the fabric. A Chinese patent with publication number CN114672915B discloses a tear-resistant fabric and its preparation method. The fabric is made of nylon, modified silicon carbide, polyester fiber, phenolic fiber, propylene, tetrafluoroethylene, modified flax fiber, anhydrous ethanol, and potassium persulfate. Silicon carbide-modified nylon fiber and polyester fiber are twisted together to form warp yarns, and polypropylene-tetrafluoroethylene fiber, phenolic fiber, and flax fiber are twisted together at intervals to form weft yarns. The warp and weft are then woven into a tear-resistant fabric. However, the preparation of the above-mentioned modified fibers is all done by directly mixing the raw materials, which is prone to problems such as agglomeration and uneven mixing. Therefore, it is urgent to develop a new preparation method that makes the mixing of the raw materials more uniform, thereby improving the relevant properties of the prepared fabric. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a tear-resistant clothing fabric and a weaving method thereof, using modified PBO fiber, modified nylon fiber, silicone-modified cotton fiber and polyester fiber as raw materials to prepare a wear-resistant and tear-resistant clothing fabric.

[0005] The technical solutions provided by the present invention for solving the above technical problems are as follows:

[0006] A tear-resistant clothing fabric comprises the following raw materials in parts by weight: 60-80 parts of modified PBO fiber, 80-100 parts of modified nylon fiber, 100-150 parts of organosilicon-modified cotton fiber, and 100-120 parts of polyester fiber;

[0007] The modified PBO fiber is epoxy resin modified PBO fiber, the modified nylon fiber is alkylamine grafted montmorillonite modified nylon fiber, and the organosilicon modified cotton fiber is organosiloxane coated cotton fiber.

[0008] Furthermore, the preparation method of the modified PBO fiber is:

[0009] A1. Add pretreated PBO fiber to a mixture of methanesulfonic acid and hydrogen peroxide, raise the temperature to 60-80° C., and react for 6-8 hours. During the reaction, add hydrogen peroxide solution to the mixture every 1-2 hours. After reacting for 6-8 hours, wash and dry to obtain acidified PBO fiber. The concentration of methanesulfonic acid is 65 wt %, the concentration of hydrogen peroxide is 30%, and the volume ratio of methanesulfonic acid to hydrogen peroxide is 3-5:1. The fiber is washed with deionized water 3-5 times and then dried in a vacuum oven at 40-50° C. for 20-40 minutes. The amount of pretreated PBO fiber in methanesulfonic acid is 0.08-0.12 g / mL.

[0010] A2. Add N,N-dimethylformamide, dicyclohexylcarbodiimide, melamine, and acidified PBO fiber to a reactor, raise the temperature to 110-125° C., react for 45-60 hours, and after completion of the reaction, wash and dry to obtain aminated PBO fiber; wherein the mass ratio of dicyclohexylcarbodiimide to melamine is 1:1.5-1.8, the amount of dicyclohexylcarbodiimide in N,N-dimethylformamide is 0.02-0.04 g / mL, and the amount of acidified PBO fiber in N,N-dimethylformamide is 0.08-0.12 g / mL; the washing method is: first washing with N,N-dimethylformamide 2-3 times, then washing with hot deionized water 3-5 times; the drying condition is: drying in a vacuum oven at 40-50° C. for 20-40 minutes;

[0011] A3. Add epoxy resin to a reactor, heat to 40-50° C., then add aminated PBO fiber and KOH, stir at a constant temperature for 10-20 minutes, then increase the temperature to 60-70° C. and stir for 8-12 hours. After the reaction is completed, remove the fiber, wash it, and dry it to obtain the modified PBO fiber; wherein the mass ratio of epoxy resin, aminated PBO fiber, and KOH is 22-30:18-22:1, and the washing method is: washing with anhydrous ethanol 3-5 times; and the drying condition is: drying in a vacuum oven at 40-50° C. for 20-40 minutes.

[0012] Furthermore, in step A1, the pretreatment process of the PBO fiber is as follows: the PBO fiber is placed in a Soxhlet extractor, refluxed at 120° C. for 2 days using a mixture of petroleum ether and acetone, the fiber is taken out from the Soxhlet extractor, washed with deionized water, and then dried to obtain pretreated PBO fiber; wherein the volume ratio of petroleum ether to acetone is 2:1.

[0013] Poly(p-phenylene benzobisoxazole) fiber (PBO fiber) boasts a light specific gravity and excellent mechanical properties. Its superior performance is attributed to its highly oriented structure. The benzene rings and oxazoles in the PBO fiber molecular chains are coplanar, allowing for close packing of the molecular chains. This creates a strong conjugation effect between the various structural components of the PBO molecular chain, resulting in greater rigidity. Consequently, the PBO macromolecules exhibit an extended chain conformation and oriented order, with the molecular chains closely packed. While this highly oriented structure imparts excellent mechanical properties to PBO fibers, it also renders the PBO fiber surface chemically inert and lacks reactive functional groups, resulting in poor surface adhesion. The smooth surface of the epoxy resin coating can reduce friction between objects, thereby reducing wear and stress concentration and improving load-bearing capacity. Furthermore, due to its inherent tension, epoxy resin undergoes ring-opening reactions under mild conditions with primary amino groups to form secondary amines, resulting in excellent adhesion. Therefore, in the present invention, PBO fibers are first acidified using a mixture of methanesulfonic acid and hydrogen peroxide, then aminated using N,N-dimethylformamide, dicyclohexylcarbodiimide, and melamine, and finally reacted with epoxy resin. The epoxy groups contained in the PBO fibers react with the aminated PBO fibers, and the epoxy resin is grafted onto the surface of the PBO fibers, effectively improving the toughness and wear resistance of the PBO fibers. The PBO fibers and the epoxy resin are bonded via chemical bonds, resulting in a tighter bond.

[0014] Furthermore, the preparation method of the modified nylon fiber is:

[0015] B1. Add montmorillonite to anhydrous ethanol, ultrasonically disperse for 2-4 hours, then add alkylamine thereto, heat to 70-85° C., stir and react for 4-6 hours, and after completion of the reaction, wash and dry the product to obtain alkylamine-grafted montmorillonite; wherein the mass ratio of montmorillonite to alkylamine is 1:1.5-2; the amount of montmorillonite in anhydrous ethanol is 0.002-0.006 g / mL, the washing conditions are: washing with anhydrous ethanol 3-5 times, and the drying conditions are: drying at 50-60° C. for 30-50 minutes;

[0016] B2. Add nylon fiber to a reactor, heat it to a molten state, then add alkylamine-grafted montmorillonite thereto, stir in the molten state for 1-3 hours, and spin to obtain the modified nylon fiber; wherein the mass ratio of nylon fiber to alkylamine-grafted montmorillonite is 2-3:1.

[0017] Furthermore, in step B1, the alkylamine is any one of dodecylamine, tetradecylamine, hexadecylamine and octadecylamine.

[0018] Montmorillonite is a layered hydrous aluminosilicate whose structural lamellae consist of two layers of silicon-oxygen tetrahedra sandwiched between one layer of aluminum-oxygen octahedrons. The lamellae are connected by shared oxygen atoms and by a combination of weak dipole moments, van der Waals forces, and hydrogen bonds. The lamellae can randomly translate and rotate, and when subjected to external forces, they can randomly slide against each other, improving the material's wear resistance and tensile properties. However, montmorillonite has a strong tendency to aggregate and has poor compatibility with most polymers. Therefore, in the present invention, alkylamines are used to modify the montmorillonite. The montmorillonite surface has a large number of oxygen-containing functional groups that can undergo alkylation reactions with the amino groups on the alkylamines. The presence of long carbon chains on the long-chain alkylamines can effectively prevent the montmorillonite from agglomerating and can also act as a lubricant when the lamellae move under external forces, reducing friction. Nylon fibers have strong wear resistance, low density, and good chemical stability. In particular, nylon fibers have good elasticity, can quickly return to their original shape, and can maintain high strength and elasticity under the influence of high temperatures and chemicals. However, they are easily deformed when subjected to small external forces, have a large friction coefficient, and are prone to generating static electricity when rubbed with metal parts. Therefore, in the present invention, alkylamine-grafted montmorillonite is blended with nylon to obtain modified nylon fibers, which increases the antistatic properties of nylon and reduces the deformation of nylon when subjected to force.

[0019] Furthermore, the preparation method of the organosilicon-modified cotton fiber is:

[0020] C1. Mix hydrochloric acid, isopropyl alcohol, and deionized water to obtain solution A; wherein the concentration of hydrochloric acid is 2 mol / L, and the volume ratio of hydrochloric acid, isopropyl alcohol, and deionized water is 5:30:9;

[0021] C2. Add organosiloxane and ethyl orthosilicate to solution A, heat to 40-50° C. and stir for 20-40 minutes, then add cotton fiber and stir at constant temperature for 18-24 hours. Take out the cotton fiber and place it in an oven, keep it at 40-50° C. for 10-20 minutes, then increase the temperature to 110-120° C. and keep it for 4-6 hours to obtain organosilicon-modified cotton fiber; wherein the molar ratio of organosiloxane to ethyl orthosilicate is 1.2-2:1; and the amount of cotton fiber in ethyl orthosilicate is 0.10-0.15 g / mL.

[0022] Furthermore, the organosiloxane is methyltrimethoxysilane.

[0023] Cotton fiber is a natural fiber that does not contain harmful substances, is harmless to the human body, and does not pollute the environment. It has good softness and comfort, and also has good moisture absorption and air permeability. However, it is prone to wrinkling and shrinking. Therefore, in the present invention, cotton fiber is immersed in a mixed solution containing organosiloxane and ethyl orthosilicate, and heated to obtain organosilicon-modified cotton fiber. The ethyl orthosilicate is hydrolyzed to generate a large number of Si-OH bonds, which react with the Si-OH functional groups in methyltrimethoxysilane to form a condensation reaction, so that the two phases can be fully bonded to form covalent bonds, so that the components can be tightly combined to form an inorganic network structure, which is attached to the surface of the cotton fiber, effectively solving the problem of cotton fiber being prone to wrinkling and shrinking.

[0024] The present invention also provides a method for weaving tear-resistant clothing fabrics, comprising the following steps:

[0025] S1. Twisting modified nylon fiber and polyester fiber, with every two strands of polyester fiber being paired with one strand of modified nylon fiber, a total of 6-12 fibers are twisted into yarn to be used as warp yarn;

[0026] S2. Twisting the modified PBO fiber and the organosilicon-modified cotton fiber, wherein every two strands of organosilicon-modified cotton fiber are paired with one strand of modified PBO fiber, and a total of 6-18 fibers are twisted into yarn, which is used as weft yarn;

[0027] S3. Weaving the warp yarn obtained in step S1 and the weft yarn obtained in step S2, with a warp yarn density of 360-380 yarns / 10 cm and a weft yarn density of 240-280 yarns / 10 cm, to obtain the tear-resistant clothing fabric.

[0028] The present invention has the following beneficial effects:

[0029] The invention uses epoxy resin to modify PBO fiber to obtain modified PBO fiber, and grafts epoxy resin on the surface of the PBO fiber to effectively improve the toughness and wear resistance of the PBO fiber; uses alkylamine to graft montmorillonite to modify nylon fiber to obtain modified nylon fiber, and the montmorillonite has a lamellar structure. When subjected to external force, the lamellar layers can randomly slide against each other, thereby improving the wear resistance and tensile properties of the material; uses organic siloxane to modify cotton fiber to obtain organic silicon modified cotton fiber, and a large number of Si-OH bonds generated by hydrolysis of ethyl orthosilicate undergo condensation reaction with Si-OH functional groups in methyltrimethoxysilane, so that the two phases can be fully bonded to form covalent bonds, and the fibers are attached to the surface of the cotton fibers to form an inorganic network structure, thereby effectively solving the problem that the cotton fibers are prone to wrinkling and shrinkage; finally, the modified nylon fiber and polyester fiber are twisted to be used as warp yarn; the modified PBO fiber and the organic silicon modified cotton fiber are twisted to be used as weft yarn; the warp yarn and the weft yarn are woven to obtain clothing fabrics with good wear resistance and good tear resistance. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] The PBO fiber used in the present invention (HM type, fiber monofilament diameter of 12 μm, tensile strength of 5.8 GPa, tensile modulus of 280 GPa, elongation at break of 2.3%, brand ZYLON) was purchased from Toyobo Co., Ltd. of Japan; nylon fiber (PA / 40D) was purchased from Qingdao Xinwei Textile Development Co., Ltd.; cotton fiber was purchased from Shandong Jinyue Textile Co., Ltd.; polyester fiber was purchased from Baoding Qianting Textile Manufacturing Co., Ltd.; methanesulfonic acid, melamine, petroleum ether, and acetone were all purchased from Chengdu Kelon Chemical Reagent Factory; dicyclohexylcarbodiimide was purchased from Dongguan Valisi Chemical Co., Ltd.; epoxy resin (E-44) was purchased from Nantong Xingchen Synthetic Materials Co., Ltd.; montmorillonite (brand DKO) was purchased from Zhejiang Fenghong Clay Co., Ltd.; methyltrimethoxysilane, ethyl orthosilicate, and isopropyl alcohol were all analytically pure and purchased from Sinopharm Chemical Reagent Co., Ltd.; all reagents were commercially available.

[0032] Example 1

[0033] A tear-resistant clothing fabric comprises the following raw materials in parts by weight: 65 parts of modified PBO fiber, 85 parts of modified nylon fiber, 110 parts of organosilicon-modified cotton fiber, and 105 parts of polyester fiber;

[0034] The modified PBO fiber is epoxy resin modified PBO fiber, the modified nylon fiber is alkylamine grafted montmorillonite modified nylon fiber, and the organosilicon modified cotton fiber is organosiloxane coated cotton fiber.

[0035] Wherein, the preparation method of modified PBO fiber is:

[0036] A1. Pretreated PBO fibers were added to a mixture of methanesulfonic acid and hydrogen peroxide, and the temperature was raised to 65°C for reaction for 7 hours. During the reaction, hydrogen peroxide solution was added to the mixture every hour. After 6 hours of reaction, the mixture was washed and dried to obtain acidified PBO fibers. The concentration of methanesulfonic acid was 65 wt%, the concentration of hydrogen peroxide was 30%, and the volume ratio of methanesulfonic acid to hydrogen peroxide was 4:1. The amount of hydrogen peroxide solution added each time was the same as the initial amount of hydrogen peroxide added, i.e., the same volume of hydrogen peroxide solution was added each time. The fibers were washed with deionized water four times and then dried in a vacuum oven at 45°C for 30 minutes. The amount of pretreated PBO fibers in methanesulfonic acid was 0.10 g / mL.

[0037] A2. Add N,N-dimethylformamide, dicyclohexylcarbodiimide, melamine, and acidified PBO fiber to a reactor, raise the temperature to 120° C. for reaction for 50 hours, and after completion of the reaction, wash and dry to obtain aminated PBO fiber; wherein the mass ratio of dicyclohexylcarbodiimide to melamine is 1:1.6, the amount of dicyclohexylcarbodiimide in N,N-dimethylformamide is 0.02 g / mL, and the amount of acidified PBO fiber in N,N-dimethylformamide is 0.10 g / mL; the washing method is: first washing with N,N-dimethylformamide three times, then washing with hot deionized water five times; the drying condition is: drying in a vacuum oven at 45° C. for 30 minutes;

[0038] A3. Add epoxy resin to the reactor, heat to 45°C, then add aminated PBO fiber and KOH, stir at a constant temperature for 20 minutes, then increase the temperature to 65°C and stir for 10 hours. After the reaction is completed, remove the fiber, wash it, and dry it to obtain modified PBO fiber; wherein the mass ratio of epoxy resin, aminated PBO fiber, and KOH is 25:21:1, and the washing method is: washing with anhydrous ethanol 5 times; the drying condition is: drying in a vacuum oven at 45°C for 30 minutes.

[0039] In step A1, the pretreatment process of the PBO fiber is as follows: the PBO fiber is placed in a Soxhlet extractor, refluxed at 120° C. for 2 days using a mixture of petroleum ether and acetone, and then the fiber is taken out from the Soxhlet extractor, washed with deionized water, and then dried to obtain the pretreated PBO fiber; wherein the volume ratio of petroleum ether to acetone is 2:1.

[0040] The preparation method of modified nylon fiber is as follows:

[0041] B1. Add montmorillonite to anhydrous ethanol, ultrasonically disperse for 3 hours, then add alkylamine thereto, heat to 80° C., stir and react for 5 hours, and after completion of the reaction, wash and dry the product to obtain alkylamine-grafted montmorillonite; wherein the mass ratio of montmorillonite to alkylamine is 1:1.8; the amount of montmorillonite in anhydrous ethanol is 0.004 g / mL, the washing conditions are: washing with anhydrous ethanol 5 times, and the drying conditions are: drying at 55° C. for 35 minutes;

[0042] B2. Add nylon fiber to a reactor, heat it to a molten state, then add alkylamine-grafted montmorillonite thereto, stir in the molten state for 2 hours, and spin to obtain modified nylon fiber; wherein the mass ratio of nylon fiber to alkylamine-grafted montmorillonite is 2.5:1.

[0043] Wherein, the alkylamine is hexadecylamine.

[0044] The preparation method of organosilicon-modified cotton fiber is as follows:

[0045] C1. Mix hydrochloric acid, isopropyl alcohol, and deionized water to obtain solution A; wherein the concentration of hydrochloric acid is 2 mol / L, and the volume ratio of hydrochloric acid, isopropyl alcohol, and deionized water is 5:30:9;

[0046] C2. Add organosiloxane and ethyl orthosilicate to solution A, heat to 45°C and stir for 30 minutes, then add cotton fiber, stir at constant temperature for 22 hours, take out the cotton fiber, place it in an oven, keep it at 45°C for 15 minutes, then increase the temperature to 115°C and keep it for 5 hours to obtain organosilicon-modified cotton fiber; wherein the molar ratio of organosiloxane to ethyl orthosilicate is 1.5:1; and the amount of cotton fiber in ethyl orthosilicate is 0.12 g / mL.

[0047] Wherein, the organosiloxane is methyltrimethoxysilane.

[0048] A method for weaving tear-resistant clothing fabrics comprises the following steps:

[0049] S1. Twisting modified nylon fiber and polyester fiber, with every two strands of polyester fiber being paired with one strand of modified nylon fiber, a total of six fibers are twisted into yarn to be used as warp yarn;

[0050] S2. Twisting the modified PBO fiber and the organosilicon-modified cotton fiber, with every two strands of organosilicon-modified cotton fiber being paired with one strand of modified PBO fiber, for a total of six fibers to be twisted into yarn, which is used as weft yarn;

[0051] S3. Weaving the warp yarn obtained in step S1 and the weft yarn obtained in step S2, with a warp yarn density of 360 yarns / 10 cm and a weft yarn density of 240 yarns / 10 cm, to obtain a tear-resistant clothing fabric.

[0052] Example 2

[0053] Compared with the first embodiment, this embodiment has the following differences, specifically:

[0054] A tear-resistant clothing fabric comprises the following raw materials in parts by weight: 60 parts of modified PBO fiber, 80 parts of modified nylon fiber, 100 parts of organosilicon-modified cotton fiber, and 100 parts of polyester fiber;

[0055] In the preparation method of modified PBO fiber, in step A1, pretreated PBO fiber is added to a mixture of methanesulfonic acid and hydrogen peroxide, and then the temperature is raised to 60°C for reaction for 6 hours. The volume ratio of methanesulfonic acid to hydrogen peroxide is 3:1. The fiber is then washed three times with deionized water and dried in a vacuum oven at 40°C for 20 minutes. The amount of pretreated PBO fiber in methanesulfonic acid is 0.08 g / mL.

[0056] In step A2, N,N-dimethylformamide, dicyclohexylcarbodiimide, melamine, and acidified PBO fiber were added to a reactor, and the temperature was raised to 110° C. and reacted for 45 hours. The mass ratio of dicyclohexylcarbodiimide to melamine was 1:1.5, the amount of dicyclohexylcarbodiimide in N,N-dimethylformamide was 0.03 g / mL, and the amount of acidified PBO fiber in N,N-dimethylformamide was 0.08 g / mL. The washing method was: first washing with N,N-dimethylformamide twice, and then washing with hot deionized water three times. The drying conditions were: drying in a vacuum oven at 40° C. for 20 minutes.

[0057] In step A3, epoxy resin is added to the reactor, heated to 40°C, and then aminated PBO fiber and KOH are added. The mixture is stirred at a constant temperature for 10 minutes, and then the temperature is increased to 60°C and stirred for 8 hours. The mass ratio of epoxy resin, aminated PBO fiber and KOH is 22:18:1. The washing method is: washing with anhydrous ethanol three times; the drying condition is: drying in a vacuum oven at 40°C for 20 minutes.

[0058] In the preparation process of the modified nylon fiber, in step B1, montmorillonite is added to anhydrous ethanol and ultrasonically dispersed for 2 hours, and then alkylamine is added thereto, and the mixture is heated to 70°C and stirred for 4 hours. The mass ratio of montmorillonite to alkylamine is 1:1.5. The amount of montmorillonite in anhydrous ethanol is 0.002 g / mL, and the washing conditions are: washing with anhydrous ethanol three times, and drying conditions are: drying at 50°C for 30 minutes.

[0059] In step B2, nylon fiber is added to a reactor, heated to a molten state, and then alkylamine-grafted montmorillonite is added thereto, and stirred in the molten state for 1 hour. The mass ratio of nylon fiber to alkylamine-grafted montmorillonite is 2:1.

[0060] The alkylamine is tetradecylamine.

[0061] In the preparation process of organosilicon-modified cotton fiber, in step C2, organosiloxane and ethyl orthosilicate are added to solution A, which is heated to 40°C and stirred for 20 minutes, after which cotton fiber is added and stirred at a constant temperature for 18 hours. The cotton fiber is taken out and placed in an oven, kept at 40°C for 10 minutes, and then the temperature is increased to 110°C and kept for 4 hours to obtain organosilicon-modified cotton fiber. The molar ratio of organosiloxane to ethyl orthosilicate is 1.2:1; and the amount of cotton fiber in ethyl orthosilicate is 0.10 g / mL.

[0062] A method for weaving tear-resistant clothing fabrics comprises the following steps:

[0063] S1. Twisting modified nylon fiber and polyester fiber, with every two strands of polyester fiber being paired with one strand of modified nylon fiber, a total of 10 fibers are twisted into yarn to be used as warp yarn;

[0064] S2. Twisting the modified PBO fiber and the organosilicon-modified cotton fiber, wherein every two strands of organosilicon-modified cotton fiber are paired with one strand of modified PBO fiber, for a total of 12 fibers twisted into yarn, which is used as weft yarn;

[0065] S3. Weaving the warp yarn obtained in step S1 and the weft yarn obtained in step S2, with a warp yarn density of 380 yarns / 10 cm and a weft yarn density of 250 yarns / 10 cm, to obtain a tear-resistant clothing fabric.

[0066] For the rest, refer to Example 1.

[0067] Example 3

[0068] Compared with the first embodiment, this embodiment has the following differences, specifically:

[0069] A tear-resistant clothing fabric comprises the following raw materials in parts by weight: 80 parts of modified PBO fiber, 100 parts of modified nylon fiber, 150 parts of organosilicon-modified cotton fiber, and 120 parts of polyester fiber;

[0070] In the preparation method of modified PBO fiber, in step A1, pretreated PBO fiber is added to a mixture of methanesulfonic acid and hydrogen peroxide, and the temperature is raised to 80°C for reaction for 8 hours. The volume ratio of methanesulfonic acid to hydrogen peroxide is 5:1. The fiber is then washed with deionized water five times and dried in a vacuum oven at 50°C for 40 minutes. The amount of pretreated PBO fiber in methanesulfonic acid is 0.12 g / mL.

[0071] In step A2, N,N-dimethylformamide, dicyclohexylcarbodiimide, melamine, and acidified PBO fiber were added to a reactor, and the temperature was raised to 125° C. for reaction for 60 hours. The mass ratio of dicyclohexylcarbodiimide to melamine was 1:1.8, the amount of dicyclohexylcarbodiimide in N,N-dimethylformamide was 0.04 g / mL, and the amount of acidified PBO fiber in N,N-dimethylformamide was 0.12 g / mL. The washing method was: first washing with N,N-dimethylformamide three times, and then washing with hot deionized water five times. The drying conditions were: drying in a vacuum oven at 50° C. for 40 minutes.

[0072] In step A3, epoxy resin was added to the reactor, heated to 50°C, and then aminated PBO fiber and KOH were added. The mixture was stirred at a constant temperature for 20 minutes, and then the temperature was raised to 70°C and stirred for 12 hours. The mass ratio of epoxy resin, aminated PBO fiber and KOH was 30:22:1. The washing method was: washing with anhydrous ethanol 5 times; and the drying condition was: drying in a vacuum oven at 50°C for 40 minutes.

[0073] In the preparation process of the modified nylon fiber, in step B1, montmorillonite is added to anhydrous ethanol and ultrasonically dispersed for 4 hours, and then alkylamine is added thereto, and the mixture is heated to 85°C and stirred for 6 hours. The mass ratio of montmorillonite to alkylamine is 1:2; the amount of montmorillonite in anhydrous ethanol is 0.006 g / mL, the washing conditions are: washing with anhydrous ethanol 5 times, and the drying conditions are: drying at 60°C for 50 minutes;

[0074] In step B2, nylon fiber is added to a reactor, heated to a molten state, and then alkylamine-grafted montmorillonite is added thereto, and stirred in a molten state for 3 hours. The mass ratio of nylon fiber to alkylamine-grafted montmorillonite is 3:1.

[0075] The alkylamine is octadecylamine.

[0076] In the preparation process of organosilicon-modified cotton fiber, in step C2, organosiloxane and ethyl orthosilicate are added to solution A, heated to 50°C and stirred for 40 minutes, and then cotton fiber is added and stirred at a constant temperature for 24 hours. The cotton fiber is taken out and placed in an oven, kept at 50°C for 20 minutes, and then the temperature is increased to 120°C and kept for 6 hours to obtain organosilicon-modified cotton fiber. The molar ratio of organosiloxane to ethyl orthosilicate is 2:1; the amount of cotton fiber in ethyl orthosilicate is 0.15 g / mL.

[0077] A method for weaving tear-resistant clothing fabrics comprises the following steps:

[0078] S1. Twisting modified nylon fiber and polyester fiber, wherein two strands of polyester fiber are paired with one strand of modified nylon fiber, for a total of 12 fibers twisted into yarn to be used as warp yarn;

[0079] S2. Twisting the modified PBO fiber and the organosilicon-modified cotton fiber, wherein every two strands of organosilicon-modified cotton fiber are paired with one strand of modified PBO fiber, for a total of 18 fibers twisted into yarn, which is used as weft yarn;

[0080] S3. Weaving the warp yarn obtained in step S1 and the weft yarn obtained in step S2, with a warp yarn density of 380 yarns / 10 cm and a weft yarn density of 280 yarns / 10 cm, to obtain a tear-resistant clothing fabric.

[0081] For the rest, refer to Example 1.

[0082] Comparative Example 1

[0083] In this comparative example, the PBO fiber was not modified, and the modified PBO fiber was replaced with PBO fiber, specifically:

[0084] A tear-resistant clothing fabric comprises the following raw materials in parts by weight: 65 parts of PBO fiber, 85 parts of modified nylon fiber, 110 parts of organosilicon-modified cotton fiber, and 105 parts of polyester fiber;

[0085] The preparation of the modified nylon fiber and the organosilicon-modified cotton fiber refers to the preparation process of the modified nylon fiber and the organosilicon-modified cotton fiber in Example 1.

[0086] In a weaving method for tear-resistant clothing fabrics, in step S2, PBO fibers and silicone-modified cotton fibers are twisted, with every two strands of silicone-modified cotton fibers being paired with one strand of PBO fiber, and a total of six fibers being twisted into yarns for use as weft yarns.

[0087] The rest of the process and preparation technology refer to Example 1.

[0088] Comparative Example 2

[0089] In this comparative example, the nylon fiber was not modified, and the modified nylon fiber was replaced with nylon fiber, specifically:

[0090] A tear-resistant clothing fabric comprises the following raw materials in parts by weight: 65 parts of modified PBO fiber, 85 parts of nylon fiber, 110 parts of organosilicon-modified cotton fiber, and 105 parts of polyester fiber;

[0091] The preparation of the modified PBO fiber and the organosilicon-modified cotton fiber refers to the preparation process of the modified PBO fiber and the organosilicon-modified cotton fiber in Example 1.

[0092] In a weaving method for tear-resistant clothing fabric, in step S1, nylon fibers and polyester fibers are twisted, with every two strands of polyester fibers being paired with one strand of nylon fiber, and a total of six fibers being twisted into yarns to be used as warp yarns.

[0093] The rest of the process and preparation technology refer to Example 1.

[0094] Comparative Example 3

[0095] In this comparative example, the cotton fiber was not modified, and the organosilicon-modified cotton fiber was replaced with cotton fiber, specifically:

[0096] A tear-resistant clothing fabric comprises the following raw materials in parts by weight: 65 parts of modified PBO fiber, 85 parts of modified nylon fiber, 110 parts of cotton fiber, and 105 parts of polyester fiber;

[0097] The preparation of the modified PBO fiber and the modified nylon fiber refers to the preparation process of the modified PBO fiber and the modified nylon fiber in Example 1.

[0098] In a weaving method for tear-resistant clothing fabrics, in step S2, modified PBO fibers and cotton fibers are twisted, with every two strands of cotton fibers being paired with one strand of modified PBO fiber, and a total of six fibers being twisted into yarns to be used as weft yarns.

[0099] The rest of the process and preparation technology refer to Example 1.

[0100] Comparative Example 4

[0101] In this comparative example, PBO fiber, nylon fiber and cotton fiber were not modified, specifically:

[0102] A tear-resistant clothing fabric, comprising the following raw materials in parts by weight: 65 parts of PBO fiber, 85 parts of nylon fiber, 110 parts of cotton fiber, and 105 parts of polyester fiber;

[0103] In a weaving method for tear-resistant clothing fabrics, in step S1, nylon fibers and polyester fibers are twisted, with every two strands of polyester fibers being paired with one strand of nylon fibers, and a total of six fibers being twisted into yarns for use as warp yarns; in step S2, PBO fibers and cotton fibers are twisted, with every two strands of cotton fibers being paired with one strand of PBO fibers, and a total of six fibers being twisted into yarns for use as weft yarns.

[0104] The rest of the process and preparation technology refer to Example 1.

[0105] Related tests:

[0106] Tear resistance test: The fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were tested according to GB / T3917-1:2009 "Tear properties of fabrics - Part 1 - Determination of tear strength by impact pendulum method"; the test results are shown in Table 1.

[0107] Table 1 Tear resistance test results

[0108]

[0109] It can be seen from the test results in Table 1 that the warp tearing strength and weft tearing strength of the fabrics prepared in the embodiments of the present invention are better than those prepared in the comparative examples, among which the warp tearing strength and weft tearing strength of the fabric prepared in Example 1 are the best.

[0110] Abrasion resistance test: The prepared fabric was tested according to the abrasion resistance test method of GB / T 21196.2-2007. The test results are shown in Table 2.

[0111] Table 2 Wear resistance test results

[0112] Group Wear times / times Example 1 4876 Example 2 4772 Example 3 4666 Comparative Example 1 3243 Comparative Example 2 3035 Comparative Example 3 3552 Comparative Example 4 2522

[0113] As can be seen from the test results in Table 2, the wear resistance of the fabrics prepared in Examples 1 to 3 is superior to that of Comparative Examples 1 to 4, with Example 1 having the best wear resistance. This is because the epoxy resin coating on the PBO fibers toughened and modified with epoxy resin effectively reduces friction between objects when subjected to external force, thereby reducing wear and stress concentration. The montmorillonite-modified nylon fibers, due to their lamellar structure, can randomly translate and rotate between the lamellar layers when subjected to external force, effectively improving the fiber's wear resistance. Finally, the silicone-coated cotton fibers form an inorganic network structure on the fiber surface, which effectively reduces damage to the cotton fibers during friction, thereby effectively improving wear resistance.

[0114] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0115] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tear-resistant clothing fabric, characterized in that: The invention comprises the following raw materials in parts by weight: 60-80 parts of modified PBO fiber, 80-100 parts of modified nylon fiber, 100-150 parts of organosilicon modified cotton fiber, and 100-120 parts of polyester fiber; The modified PBO fiber is epoxy resin modified PBO fiber, the modified nylon fiber is alkylamine grafted montmorillonite modified nylon fiber, and the organosilicon modified cotton fiber is organosiloxane coated cotton fiber; The preparation method of the modified PBO fiber is: A1. Add pretreated PBO fiber to a mixture of methanesulfonic acid and hydrogen peroxide, raise the temperature to 60-80° C., and react for 6-8 hours. During the reaction, add hydrogen peroxide solution to the mixture every 1-2 hours. After the reaction is complete, wash and dry to obtain acidified PBO fiber. A2. Add N,N-dimethylformamide, dicyclohexylcarbodiimide, melamine and acidified PBO fiber into a reactor, raise the temperature to 110-125° C. and react for 45-60 hours. After the reaction is complete, wash and dry to obtain aminated PBO fiber; A3. Add epoxy resin to the reactor, heat to 40-50° C., then add aminated PBO fiber and KOH, stir at constant temperature for 10-20 minutes, then increase the temperature to 60-70° C. and stir for 8-12 hours. After the reaction is complete, remove the fiber, wash, and dry it to obtain the modified PBO fiber; In step A1, the pretreatment process of the PBO fiber is as follows: the PBO fiber is placed in a Soxhlet extractor, and a mixture of petroleum ether and acetone is refluxed at 120° C. for 2 days, and then the fiber is taken out from the Soxhlet extractor, washed with deionized water, and dried to obtain the pretreated PBO fiber; The preparation method of the modified nylon fiber is: B1. Add montmorillonite to anhydrous ethanol, ultrasonically disperse for 2-4 hours, then add alkylamine, heat to 70-85° C., stir and react for 4-6 hours. After the reaction is complete, wash and dry the product to obtain alkylamine-grafted montmorillonite; B2. Add nylon fiber to a reactor, heat it to a molten state, add alkylamine-grafted montmorillonite thereto, stir in the molten state for 1-3 hours, and spin to obtain the modified nylon fiber; The preparation method of the organosilicon-modified cotton fiber is as follows: C1. Mix hydrochloric acid, isopropyl alcohol and deionized water to obtain solution A; C2. Add organosiloxane and ethyl orthosilicate to solution A, heat to 40-50°C and stir for 20-40 minutes, then add cotton fiber and stir at a constant temperature for 18-24 hours. Take out the cotton fiber and place it in an oven. Keep it at 40-50°C for 10-20 minutes, then increase the temperature to 110-120°C and keep it for 4-6 hours to obtain organosilicon-modified cotton fiber.

2. The tear-resistant clothing fabric according to claim 1, characterized in that: In step B1, the alkylamine is any one of dodecylamine, tetradecylamine, hexadecylamine and octadecylamine.

3. The tear-resistant clothing fabric according to claim 1, characterized in that: The organosiloxane is methyltrimethoxysilane.

4. The method for weaving the tear-resistant clothing fabric according to any one of claims 1 to 3, comprising the following steps: S1. Twisting modified nylon fiber and polyester fiber, with every two strands of polyester fiber being paired with one strand of modified nylon fiber, a total of 6-12 fibers are twisted into yarn to be used as warp yarn; S2. Twisting the modified PBO fiber and the organosilicon-modified cotton fiber, wherein every two strands of organosilicon-modified cotton fiber are paired with one strand of modified PBO fiber, and a total of 6-18 fibers are twisted into yarn, which is used as weft yarn; S3. Weaving the warp yarn obtained in step S1 and the weft yarn obtained in step S2, with a warp yarn density of 360-380 yarns / 10 cm and a weft yarn density of 240-280 yarns / 10 cm, to obtain the tear-resistant clothing fabric.

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