A woven suede fabric and a preparation process thereof

Abstract

The application discloses a woven suede fabric and a preparation process thereof, and relates to the technical field of fabrics.The base cloth is impregnated with an impregnating solution to prepare a woven suede fabric with excellent flame retardance.Modified metal organic framework material is added to the impregnating solution, and the metal organic framework material has excellent thermal stability.The application uses 2-methyl imidazole and zinc nitrate as raw materials, and then encapsulates hexachlorocyclotriphosphazene with good flame retardance into the metal organic framework material, so that the flame retardance of the metal organic framework material is further improved, and the flame retardance of the woven suede fabric is improved.The metal organic framework material is treated with phytic acid, and then copper sulfate pentahydrate is added, so that more metal ions can be chelated due to the chelation performance of the phytic acid on the metal ions, and the catalytic carbonization effect is achieved, so that the flame retardance of the woven suede fabric is improved.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, specifically to a woven suede fabric and its preparation process. Background Technology

[0002] Woven suede fabric is a type of fabric with a pleasant hand feel, widely used in clothing, home décor, and automotive interiors due to its unique texture and soft touch. Compared to traditional natural leather, suede fabric offers greater softness and abrasion resistance during production and use, gradually becoming an important product in the modern textile industry. Traditional suede fabric is generally made from synthetic fibers such as polyester and nylon, processed through spinning, weaving, and dyeing. However, suede fabric produced using traditional methods suffers from poor flame retardancy.

[0003] To address the aforementioned issues and improve the flame-retardant properties of suede fabric, this invention provides a woven suede fabric and its preparation process. Summary of the Invention

[0004] The purpose of this invention is to provide a woven suede fabric and its preparation process to solve the problems raised in the prior art.

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

[0006] A process for preparing woven suede fabric includes the following steps:

[0007] Step 1: Use polyester fiber as the warp and polyurethane fiber as the weft, and weave to obtain the base fabric;

[0008] Step 2: Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant, and stir evenly to obtain impregnation solution;

[0009] Step 3: Impregnate the base fabric with an impregnation solution for 5-10 minutes. Remove the fabric, introduce a magnetic field with the magnetic field direction and the base fabric horizontal. React for 20-30 minutes, then wash with water and dry to obtain the treated base fabric.

[0010] Step 4: The treated base fabric is needle-punched, heat-set, brushed, and sheared to obtain woven suede fabric.

[0011] A more optimized method for preparing the modified metal-organic framework material is as follows: take the metal-organic framework material, copper sulfate pentahydrate, ferric sulfate heptahydrate, ferric chloride hexahydrate, and deionized water, stir evenly, add phytic acid aqueous solution, stir evenly, then add ammonia aqueous solution dropwise, adjust the pH value to 8.8-9.5, raise the temperature to 65-70℃, react for 4-5 hours, wash with water and dry to obtain the modified metal-organic framework material.

[0012] A more optimized method for preparing the metal-organic framework material is as follows: take hexachlorocyclotriphosphazene, 2-methylimidazole, and methanol, and ultrasonically disperse them for 20-30 min to obtain a mixed solution; take zinc nitrate hexahydrate and methanol, and ultrasonically disperse them for 20-30 min, add them to the mixed solution, stir at 25-30℃ for 60-70 min, age for 22-26 h, wash and dry to obtain the metal-organic framework material.

[0013] A more optimized method for preparing the polyurethane emulsion is as follows: Acetone oxime and acetone are taken and stirred evenly to obtain an acetone oxime solution; hydroxypropyl silicone oil, polypropylene glycol, and acetone are taken and stirred evenly, heated to 50-55℃, 4,4'-diphenylmethane diisocyanate is added, and the reaction is carried out for 2-3 hours; benzoin dimethyl ether is added, and the reaction is carried out for 2-3 hours; the acetone oxime solution is added dropwise, and the reaction is continued for 2-3 hours; the temperature is lowered to 25-30℃, triethylamine is added, and the reaction is carried out for 20-40 minutes; the solvent is removed to obtain a prepolymer; the prepolymer, deionized water, and sodium dodecyl sulfate are taken and emulsified for 30-40 minutes to obtain the polyurethane emulsion.

[0014] More preferably, the impregnation solution includes the following components by weight: 60-70 parts polyurethane emulsion, 4-6 parts modified metal-organic framework material, 4-8 parts organic solvent butyl ester, 1-3 parts dye, and 1-2 parts surfactant.

[0015] In a more optimized manner, in step three, the bath ratio of the base fabric to the impregnation solution is 1:(10-12).

[0016] Ideally, the surfactant is a fatty alcohol polyoxyethylene ether.

[0017] In a more optimized manner, during the weaving process in step one, the warp density is 54-62 threads / cm and the weft density is 36-40 threads / cm.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention uses an impregnation solution to impregnate a base fabric, preparing a woven suede fabric with excellent flame retardancy. A modified metal-organic framework (MOF) material is added to the impregnation solution. MOFs possess excellent thermal stability. This invention uses 2-methylimidazole and zinc nitrate as raw materials, and then encapsulates hexachlorocyclotriphosphazene, which has good flame retardant properties, into the MOF material, further enhancing the flame retardant effect of the MOF material, thereby improving the flame retardant performance of the woven suede fabric.

[0020] 2. This invention uses phytic acid to treat the metal-organic framework material, followed by the addition of copper sulfate pentahydrate. The chelating properties of phytic acid allow for the chelation of more metal ions, resulting in a catalytic carbonization effect. The addition of ferric sulfate heptahydrate and ferric chloride hexahydrate allows the modified metal-organic framework material to be loaded with magnetic iron oxide particles, improving the dispersion of the modified metal-organic framework material in the matrix. After impregnation treatment of the base fabric, a magnetic field is introduced. The magnetic iron oxide particles loaded on the modified metal-organic framework material are then acted upon by the magnetic field, resulting in a uniform distribution on the surface of the base fabric, enhancing the dispersion of the modified metal-organic framework material and thus improving the flame-retardant properties of the woven suede fabric. Detailed Implementation

[0021] 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.

[0022] The sources and types of the substances involved in this invention are not subject to any particular limitation. Exemplary examples include: polypropylene glycol: type: S24146, which can be purchased from Shanghai Yuanye Biotechnology Co., Ltd.; polyester fiber: 100D; polyurethane fiber: 5% polyurethane elastic fiber (spandex): 70D.

[0023] Example 1: A process for preparing woven suede fabric, comprising the following steps:

[0024] Step 1: Preparation of metal-organic framework materials:

[0025] Take 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole and 100 mL of methanol, and ultrasonically disperse for 25 min to obtain a mixture; take 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol, ultrasonically disperse for 25 min, add to the mixture, stir at 28 °C for 65 min, age for 24 h, wash and dry to obtain metal-organic framework material;

[0026] Step 2: Preparation of modified metal-organic framework materials:

[0027] Take the metal-organic framework material prepared in step one, 1.6 g of copper sulfate pentahydrate, 0.8 g of ferric sulfate heptahydrate, 1.5 g of ferric chloride hexahydrate, and 200 mL of deionized water, stir well, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir well, then add ammonia aqueous solution dropwise to adjust the pH value to 9.0, heat to 68℃, react for 4.5 h, wash with water and dry to obtain the modified metal-organic framework material;

[0028] Step 3: Preparation of polyurethane emulsion:

[0029] Take 5.5g of acetone oxime and 30mL of acetone, stir well to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir well, heat to 52℃, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, add the acetone oxime solution dropwise, continue the reaction for 2.5h, cool to 28℃, add 1.6g of triethylamine, react for 30min, remove the solvent to obtain the prepolymer; take 40g of the prepolymer, 150mL of deionized water, and 2g of sodium dodecyl sulfate, emulsify for 35min to obtain a polyurethane emulsion;

[0030] Step 4: Preparation of machine-woven suede fabric:

[0031] Polyester fibers are used as warp threads and polyurethane fibers are used as weft threads to weave a base fabric.

[0032] Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant fatty alcohol polyoxyethylene ether, stir evenly to obtain impregnation solution;

[0033] The base fabric is impregnated with an impregnation solution for 8 minutes, then removed and subjected to a magnetic field with the magnetic field direction and the base fabric horizontal, and the magnetic field strength is 230 mT. The reaction is carried out for 25 minutes. The fabric is then washed and dried to obtain the treated base fabric. The treated base fabric is then subjected to needle punching, heat setting, napping, and shearing to obtain a woven suede fabric with a thickness of 0.4 mm.

[0034] The fabric is woven with a warp density of 58 threads / cm and a weft density of 38 threads / cm.

[0035] The ratio of the base fabric to the impregnation solution is 1:11;

[0036] The impregnation solution comprises the following components by weight: 65 parts polyurethane emulsion, 5 parts modified metal-organic framework material, 6 parts organic solvent butyl ester, 2 parts dye, and 1.5 parts surfactant fatty alcohol polyoxyethylene ether.

[0037] Example 2: A process for preparing woven suede fabric, comprising the following steps:

[0038] Step 1: Preparation of metal-organic framework materials:

[0039] Take 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole, and 100 mL of methanol, and ultrasonically disperse for 20 min to obtain a mixture; take 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol, ultrasonically disperse for 20 min, add to the mixture, stir at 25 °C for 60 min, age for 22 h, wash and dry to obtain a metal-organic framework material;

[0040] Step 2: Preparation of modified metal-organic framework materials:

[0041] Take the metal-organic framework material prepared in step one, 1.6 g of copper sulfate pentahydrate, 0.8 g of ferric sulfate heptahydrate, 1.5 g of ferric chloride hexahydrate, and 200 mL of deionized water, stir well, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir well, then add ammonia aqueous solution dropwise to adjust the pH value to 8.8, heat to 65℃, react for 4 h, wash with water and dry to obtain the modified metal-organic framework material;

[0042] Step 3: Preparation of polyurethane emulsion:

[0043] Take 5.5g of acetone oxime and 30mL of acetone, stir well to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir well, heat to 50℃, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2h, add 1.8g of benzoin dimethyl ether, react for 2h, add the acetone oxime solution dropwise, continue the reaction for 2h, cool to 25℃, add 1.6g of triethylamine, react for 20min, remove the solvent to obtain the prepolymer; take 40g of the prepolymer, 150mL of deionized water, and 2g of sodium dodecyl sulfate, emulsify for 35min to obtain a polyurethane emulsion;

[0044] Step 4: Preparation of machine-woven suede fabric:

[0045] Polyester fibers are used as warp threads and polyurethane fibers are used as weft threads to weave a base fabric.

[0046] Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant fatty alcohol polyoxyethylene ether, stir evenly to obtain impregnation solution;

[0047] The base fabric is impregnated with an impregnation solution for 5 minutes, then removed and subjected to a magnetic field with the magnetic field direction and the base fabric horizontal, and the magnetic field strength is 220 mT. The reaction is carried out for 20 minutes. The fabric is then washed and dried to obtain the treated base fabric. The treated base fabric is then subjected to needle punching, heat setting, napping, and shearing to obtain a woven suede fabric with a thickness of 0.4 mm.

[0048] The fabric is woven with a warp density of 54 threads / cm and a weft density of 36 threads / cm.

[0049] The ratio of the base fabric to the impregnation solution is 1:10;

[0050] The impregnation solution comprises the following components by weight: 60 parts polyurethane emulsion, 4 parts modified metal-organic framework material, 4 parts organic solvent butyl ester, 1 part dye, and 1 part surfactant fatty alcohol polyoxyethylene ether.

[0051] Example 3: A process for preparing woven suede fabric, comprising the following steps:

[0052] Step 1: Preparation of metal-organic framework materials:

[0053] Take 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole and 100 mL of methanol, and ultrasonically disperse for 30 min to obtain a mixture; take 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol, ultrasonically disperse for 30 min, add to the mixture, stir at 30 °C for 70 min, age for 26 h, wash and dry to obtain metal-organic framework material;

[0054] Step 2: Preparation of modified metal-organic framework materials:

[0055] Take the metal-organic framework material prepared in step one, 1.6 g of copper sulfate pentahydrate, 0.8 g of ferric sulfate heptahydrate, 1.5 g of ferric chloride hexahydrate, and 200 mL of deionized water, stir well, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir well, then add ammonia aqueous solution dropwise to adjust the pH value to 9.5, heat to 70℃, react for 5 h, wash with water and dry to obtain the modified metal-organic framework material;

[0056] Step 3: Preparation of polyurethane emulsion:

[0057] Take 5.5g of acetone oxime and 30mL of acetone, stir well to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir well, heat to 55℃, add 16g of 4,4'-diphenylmethane diisocyanate, react for 3h, add 1.8g of benzoin dimethyl ether, react for 3h, add the acetone oxime solution dropwise, continue the reaction for 3h, cool to 30℃, add 1.6g of triethylamine, react for 40min, remove the solvent to obtain the prepolymer; take 40g of the prepolymer, 150mL of deionized water, and 2g of sodium dodecyl sulfate, emulsify for 40min to obtain a polyurethane emulsion;

[0058] Step 4: Preparation of machine-woven suede fabric:

[0059] Polyester fibers are used as warp threads and polyurethane fibers are used as weft threads to weave a base fabric.

[0060] Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant fatty alcohol polyoxyethylene ether, stir evenly to obtain impregnation solution;

[0061] The base fabric is impregnated with an impregnation solution for 10 minutes, then removed and subjected to a magnetic field with the magnetic field direction and the base fabric horizontal, and the magnetic field strength is 240 mT. The reaction is carried out for 30 minutes. The fabric is then washed and dried to obtain the treated base fabric. The treated base fabric is then subjected to needle punching, heat setting, napping, and shearing to obtain a woven suede fabric with a thickness of 0.4 mm.

[0062] The fabric is woven with a warp density of 62 threads / cm and a weft density of 40 threads / cm.

[0063] The ratio of the base fabric to the impregnation solution is 1:10;

[0064] The impregnation solution comprises the following components by weight: 70 parts polyurethane emulsion, 6 parts modified metal-organic framework material, 8 parts organic solvent butyl ester, 3 parts dye, and 2 parts surfactant fatty alcohol polyoxyethylene ether.

[0065] Comparative Example 1: The metal-organic framework material was not treated with phytic acid; all other aspects were the same as in Example 1.

[0066] A process for preparing woven suede fabric includes the following steps:

[0067] Step 1: Preparation of metal-organic framework materials:

[0068] Take 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole and 100 mL of methanol, and ultrasonically disperse for 25 min to obtain a mixture; take 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol, ultrasonically disperse for 25 min, add to the mixture, stir at 28 °C for 65 min, age for 24 h, wash and dry to obtain metal-organic framework material;

[0069] Step 2: Preparation of modified metal-organic framework materials:

[0070] Take the metal-organic framework material prepared in step one, 1.6 g of copper sulfate pentahydrate, 0.8 g of ferric sulfate heptahydrate, 1.5 g of ferric chloride hexahydrate, and 200 mL of deionized water, stir well, then add ammonia solution dropwise to adjust the pH value to 9.0, heat to 68℃, react for 4.5 h, wash with water and dry to obtain the modified metal-organic framework material.

[0071] Step 3: Preparation of polyurethane emulsion:

[0072] Take 5.5g of acetone oxime and 30mL of acetone, stir well to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir well, heat to 52℃, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, add the acetone oxime solution dropwise, continue the reaction for 2.5h, cool to 28℃, add 1.6g of triethylamine, react for 30min, remove the solvent to obtain the prepolymer; take 40g of the prepolymer, 150mL of deionized water, and 2g of sodium dodecyl sulfate, emulsify for 35min to obtain a polyurethane emulsion;

[0073] Step 4: Preparation of machine-woven suede fabric:

[0074] Polyester fibers are used as warp threads and polyurethane fibers are used as weft threads to weave a base fabric.

[0075] Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant fatty alcohol polyoxyethylene ether, stir evenly to obtain impregnation solution;

[0076] The base fabric is impregnated with an impregnation solution for 8 minutes, then removed and subjected to a magnetic field with the magnetic field direction and the base fabric horizontal, and the magnetic field strength is 230 mT. The reaction is carried out for 25 minutes. The fabric is then washed and dried to obtain the treated base fabric. The treated base fabric is then subjected to needle punching, heat setting, napping, and shearing to obtain a woven suede fabric with a thickness of 0.4 mm.

[0077] The fabric is woven with a warp density of 58 threads / cm and a weft density of 38 threads / cm.

[0078] The ratio of the base fabric to the impregnation solution is 1:11;

[0079] The impregnation solution comprises the following components by weight: 65 parts polyurethane emulsion, 5 parts modified metal-organic framework material, 6 parts organic solvent butyl ester, 2 parts dye, and 1.5 parts surfactant fatty alcohol polyoxyethylene ether.

[0080] Comparative Example 2: Ferric sulfate heptahydrate and ferric chloride hexahydrate were not added; all other aspects were the same as in Example 1.

[0081] A process for preparing woven suede fabric includes the following steps:

[0082] Step 1: Preparation of metal-organic framework materials:

[0083] Take 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole and 100 mL of methanol, and ultrasonically disperse for 25 min to obtain a mixture; take 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol, ultrasonically disperse for 25 min, add to the mixture, stir at 28 °C for 65 min, age for 24 h, wash and dry to obtain metal-organic framework material;

[0084] Step 2: Preparation of modified metal-organic framework materials:

[0085] Take the metal-organic framework material prepared in step one, 1.6 g of copper sulfate pentahydrate, and 200 mL of deionized water, stir well, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir well, then add ammonia aqueous solution dropwise to adjust the pH value to 9.0, heat to 68℃, react for 4.5 h, wash with water and dry to obtain the modified metal-organic framework material.

[0086] Step 3: Preparation of polyurethane emulsion:

[0087] Take 5.5g of acetone oxime and 30mL of acetone, stir well to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir well, heat to 52℃, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, add the acetone oxime solution dropwise, continue the reaction for 2.5h, cool to 28℃, add 1.6g of triethylamine, react for 30min, remove the solvent to obtain the prepolymer; take 40g of the prepolymer, 150mL of deionized water, and 2g of sodium dodecyl sulfate, emulsify for 35min to obtain a polyurethane emulsion;

[0088] Step 4: Preparation of machine-woven suede fabric:

[0089] Polyester fibers are used as warp threads and polyurethane fibers are used as weft threads to weave a base fabric.

[0090] Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant fatty alcohol polyoxyethylene ether, stir evenly to obtain impregnation solution;

[0091] The base fabric is impregnated with an impregnation solution for 8 minutes, then removed and subjected to a magnetic field with the magnetic field direction and the base fabric horizontal, and the magnetic field strength is 230 mT. The reaction is carried out for 25 minutes. The fabric is then washed and dried to obtain the treated base fabric. The treated base fabric is then subjected to needle punching, heat setting, napping, and shearing to obtain a woven suede fabric with a thickness of 0.4 mm.

[0092] The fabric is woven with a warp density of 58 threads / cm and a weft density of 38 threads / cm.

[0093] The ratio of the base fabric to the impregnation solution is 1:11;

[0094] The impregnation solution comprises the following components by weight: 65 parts polyurethane emulsion, 5 parts modified metal-organic framework material, 6 parts organic solvent butyl ester, 2 parts dye, and 1.5 parts surfactant fatty alcohol polyoxyethylene ether.

[0095] Comparative Example 3: No magnetic field was introduced; all other aspects were the same as in Example 1.

[0096] A process for preparing woven suede fabric includes the following steps:

[0097] Step 1: Preparation of metal-organic framework materials:

[0098] Take 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole and 100 mL of methanol, and ultrasonically disperse for 25 min to obtain a mixture; take 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol, ultrasonically disperse for 25 min, add to the mixture, stir at 28 °C for 65 min, age for 24 h, wash and dry to obtain metal-organic framework material;

[0099] Step 2: Preparation of modified metal-organic framework materials:

[0100] Take the metal-organic framework material prepared in step one, 1.6 g of copper sulfate pentahydrate, 0.8 g of ferric sulfate heptahydrate, 1.5 g of ferric chloride hexahydrate, and 200 mL of deionized water, stir well, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir well, then add ammonia aqueous solution dropwise to adjust the pH value to 9.0, heat to 68℃, react for 4.5 h, wash with water and dry to obtain the modified metal-organic framework material;

[0101] Step 3: Preparation of polyurethane emulsion:

[0102] Take 5.5g of acetone oxime and 30mL of acetone, stir well to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir well, heat to 52℃, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, add the acetone oxime solution dropwise, continue the reaction for 2.5h, cool to 28℃, add 1.6g of triethylamine, react for 30min, remove the solvent to obtain the prepolymer; take 40g of the prepolymer, 150mL of deionized water, and 2g of sodium dodecyl sulfate, emulsify for 35min to obtain a polyurethane emulsion;

[0103] Step 4: Preparation of machine-woven suede fabric:

[0104] Polyester fibers are used as warp threads and polyurethane fibers are used as weft threads to weave a base fabric.

[0105] Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant fatty alcohol polyoxyethylene ether, stir evenly to obtain impregnation solution;

[0106] The base fabric is impregnated with an impregnation solution for 8 minutes, then removed, washed, and dried to obtain the treated base fabric. The treated base fabric is then subjected to needle punching, heat setting, napping, and shearing to obtain a woven suede fabric with a thickness of 0.4 mm.

[0107] The fabric is woven with a warp density of 58 threads / cm and a weft density of 38 threads / cm.

[0108] The ratio of the base fabric to the impregnation solution is 1:11;

[0109] The impregnation solution comprises the following components by weight: 65 parts polyurethane emulsion, 5 parts modified metal-organic framework material, 6 parts organic solvent butyl ester, 2 parts dye, and 1.5 parts surfactant fatty alcohol polyoxyethylene ether.

[0110] experiment

[0111] The woven suede fabrics prepared in Examples 1 to 3 and Comparative Examples 1 to 3 were subjected to performance tests. The warp tensile breaking strength of the woven suede fabrics was tested; then, their limiting oxygen index was tested to characterize their flame retardant properties. The data obtained are shown in the table below:

[0112] Example 1 1120 32.7 Example 2 1119 32.5 Example 3 1121 32.8 Comparative Example 1 1117 29.1 Comparative Example 2 1116 28.4 Comparative Example 3 1114 29.8

[0113] Conclusion: The data comparison in the table shows that in Comparative Example 1, without phytic acid treatment of the metal-organic framework material, the metal ion loading is reduced, resulting in a decrease in the flame retardancy of the woven suede fabric. In Comparative Example 2, without the addition of ferric sulfate heptahydrate and ferric chloride hexahydrate, the flame retardancy of the woven suede fabric deteriorates. In Comparative Example 3, without the introduction of a magnetic field, the modified metal-organic framework material is unevenly dispersed, leading to a decrease in the flame retardancy of the woven suede fabric. Examples 1 to 3 of this invention used an impregnation solution to impregnate the base fabric, preparing a woven suede fabric with excellent flame retardancy. The addition of a modified metal-organic framework material to the impregnation solution, which possesses excellent thermal stability, further enhances the flame retardant effect of the metal-organic framework material by encapsulating hexachlorocyclotriphosphazene, which has good flame retardant properties, within the metal-organic framework material, thereby improving the flame retardant performance of the woven suede fabric. In Examples 1 to 2 of this invention, phytic acid is used to treat the metal-organic framework (MOF) material, followed by the addition of copper sulfate pentahydrate. The chelating properties of phytic acid allow for the chelation of more metal ions, resulting in a catalytic carbonization effect. The addition of ferric sulfate heptahydrate and ferric chloride hexahydrate allows the modified MOF material to be loaded with magnetic iron oxide (Fe3O4) particles, improving the dispersion of the modified MOF material in the matrix. After impregnation treatment of the base fabric, a magnetic field is introduced. The magnetic iron oxide particles loaded on the modified MOF material are then acted upon by the magnetic field, resulting in a uniform distribution on the base fabric surface, enhancing the dispersion of the modified MOF material and thus improving the flame-retardant properties of the woven suede fabric.

[0114] 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 manufacturing process for woven suede fabric, characterized in that: Includes the following steps: Step 1: Use polyester fiber as the warp and polyurethane fiber as the weft, and weave to obtain the base fabric; Step 2: Take polyurethane emulsion, modified metal-organic framework material, organic solvent, dye, and surfactant, and stir evenly to obtain impregnation solution; Step 3: Impregnate the base fabric with an impregnation solution for 5-10 minutes. Remove the fabric, introduce a magnetic field with the magnetic field direction and the base fabric horizontal. React for 20-30 minutes, then wash with water and dry to obtain the treated base fabric. Step 4: The treated base fabric is needle-punched, heat-set, napped, and sheared to obtain woven suede fabric; The polyurethane emulsion is prepared as follows: Acetone oxime and acetone are taken and stirred evenly to obtain an acetone oxime solution; hydroxypropyl silicone oil, polypropylene glycol, and acetone are taken and stirred evenly, heated to 50-55℃, 4,4'-diphenylmethane diisocyanate is added, and the reaction is carried out for 2-3 hours; benzoin dimethyl ether is added, and the reaction is carried out for 2-3 hours; the acetone oxime solution is added dropwise, and the reaction is continued for 2-3 hours; the temperature is lowered to 25-30℃, triethylamine is added, and the reaction is carried out for 20-40 minutes; the solvent is removed to obtain a prepolymer; the prepolymer, deionized water, and sodium dodecyl sulfate are taken and emulsified for 30-40 minutes to obtain a polyurethane emulsion. The modified metal-organic framework material is prepared as follows: take metal-organic framework material, copper sulfate pentahydrate, ferric sulfate heptahydrate, ferric chloride hexahydrate, and deionized water, stir evenly, add phytic acid aqueous solution, stir evenly, then add ammonia aqueous solution dropwise, adjust the pH value to 8.8-9.5, heat to 65-70℃, react for 4-5 hours, wash with water and dry to obtain the modified metal-organic framework material. The preparation method of the metal-organic framework material is as follows: take hexachlorocyclotriphosphazene, 2-methylimidazole and methanol, and ultrasonically disperse them for 20-30 min to obtain a mixed solution; take zinc nitrate hexahydrate and methanol, and ultrasonically disperse them for 20-30 min, add them to the mixed solution, stir at 25-30℃ for 60-70 min, age for 22-26 h, wash and dry to obtain the metal-organic framework material.

2. The manufacturing process of woven suede fabric according to claim 1, characterized in that: The impregnation solution comprises the following components by weight: 60-70 parts polyurethane emulsion, 4-6 parts modified metal-organic framework material, 4-8 parts organic solvent butyl ester, 1-3 parts dye, and 1-2 parts surfactant.

3. The manufacturing process of woven suede fabric according to claim 1, characterized in that: In step three, the bath ratio of the base fabric to the impregnation solution is 1:(10-12).

4. The preparation process of a woven suede fabric according to claim 2, characterized in that: The surfactant is a fatty alcohol polyoxyethylene ether.

5. The manufacturing process of a woven suede fabric according to claim 1, characterized in that: In step one, during the weaving process, the warp density is 54-62 threads / cm and the weft density is 36-40 threads / cm.

6. The woven suede fabric prepared by the manufacturing process of the woven suede fabric according to any one of claims 1-5.