Woven suede fabric and preparation process thereof

Abstract

The invention discloses a woven suede fabric and a preparation process thereof, and relates to the technical field of fabrics. According to the preparation method, the base cloth is subjected to dipping treatment by using the dipping liquid, so that the woven suede fabric with excellent flame retardance is prepared. A modified metal organic framework material is added into an impregnation liquid, the metal organic framework material has excellent thermal stability, 2-methylimidazole and zinc nitrate are used as raw materials, hexachlorocyclotriphosphazene with a good flame-retardant effect is packaged into the metal organic framework material, and the flame-retardant performance of the material is improved. The flame-retardant effect of the metal organic framework material is further enhanced, so that the flame-retardant property of the woven suede fabric is improved. The metal organic framework material is treated by using phytic acid, then copper sulfate pentahydrate is added, more metal ions can be chelated through the chelating performance of phytic acid on the metal ions, the catalytic carbonization effect is achieved, and therefore the flame retardant property of the woven suede fabric is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, in particular to a woven suede fabric and a preparation process thereof. Background Art

[0002] Woven suede fabric is a kind of fabric with good hand feel. It is widely used in clothing, home decoration and car interior due to its unique texture and soft touch. Compared with traditional natural leather, suede fabric has higher softness and wear resistance during production and use, and has gradually become an important product in the modern textile industry. Traditional suede fabric is generally made of synthetic fiber materials such as polyester and nylon, and is made through spinning, weaving, dyeing and other processes. However, the suede fabric prepared by traditional technology has the problem of poor flame retardancy.

[0003] In order to solve the above problems and improve the flame retardant properties of suede fabrics, the present invention provides a woven suede fabric and a preparation process thereof. Summary of the invention

[0004] The object of the present invention is to provide a woven suede fabric and a preparation process thereof, so as to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A preparation process of a woven suede fabric comprises the following steps:

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

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

[0009] Step 3: Use the impregnation liquid to impregnate the base fabric for 5-10 minutes, take it out, introduce a magnetic field, set the direction of the magnetic field and the base fabric horizontally, react for 20-30 minutes, then wash and dry to obtain the treated base fabric;

[0010] Step 4: The treated base fabric is subjected to needle punching, heat setting, sanding and shearing treatments to obtain a woven suede fabric.

[0011] More optimally, the preparation method of the modified metal organic framework material is: 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, heat to 65-70°C, react for 4-5h, wash with water, and dry to obtain the modified metal organic framework material.

[0012] More optimally, the preparation method of the metal organic framework material is: take hexachlorocyclotriphosphazene, 2-methylimidazole, and methanol, ultrasonically disperse for 20-30 minutes to obtain a mixed solution; take zinc nitrate hexahydrate and methanol, ultrasonically disperse for 20-30 minutes, add the mixed solution, stir at 25-30°C for 60-70 minutes, age for 22-26 hours, wash, and dry to obtain the metal organic framework material.

[0013] More optimally, the preparation method of the polyurethane emulsion is: take acetone oxime and acetone, stir evenly to obtain acetone oxime solution; take hydroxypropyl silicone oil, polypropylene glycol, and acetone, stir evenly, heat to 50-55°C, add 4,4'-diphenylmethane diisocyanate, react for 2-3h, add benzoin dimethyl ether, react for 2-3h, dropwise add acetone oxime solution, continue to react for 2-3h, cool to 25-30°C, add triethylamine, react for 20-40min, remove the solvent, and obtain a prepolymer; take the prepolymer, deionized water, and sodium dodecyl sulfate, emulsify for 30-40min to obtain a polyurethane emulsion.

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

[0015] More optimally, in step three, the bath ratio of the base fabric to the impregnation liquid is 1:(10-12).

[0016] More optimally, the surfactant is fatty alcohol polyoxyethylene ether.

[0017] More optimally, in step one, when the fabric is being woven, the warp density is 54-62 strands / cm, and the weft density is 36-40 strands / cm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention uses an impregnation liquid to impregnate the base fabric to prepare a woven suede fabric with excellent flame retardancy. A modified metal organic framework material is added to the impregnation liquid. The metal organic framework material has excellent thermal stability. The present invention uses 2-methylimidazole and zinc nitrate as raw materials, and then encapsulates hexachlorocyclotriphosphazene with good flame retardant effect into the metal organic framework material, further enhancing the flame retardant effect of the metal organic framework material, thereby improving the flame retardant performance of the woven suede fabric.

[0020] 2. The present invention uses phytic acid to treat the metal organic framework material, and then adds copper sulfate pentahydrate, through the chelating property of phytic acid to metal ions, more metal ions can be chelated, which has the effect of catalytic carbonization. The addition of ferrous sulfate heptahydrate and ferric chloride hexahydrate allows the modified metal organic framework material to be loaded with magnetic ferrosoferric oxide particles, thereby improving the dispersibility of the modified metal organic framework material in the matrix. After the base fabric is impregnated, the present invention introduces a magnetic field, and the magnetic ferrosoferric oxide particles loaded on the modified metal organic framework material are subjected to the magnetic field, so as to be evenly distributed on the surface of the base fabric, thereby enhancing the dispersibility of the modified metal organic framework material, thereby improving the flame retardant properties of the woven suede fabric. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The sources and models of the substances involved in the present invention are not particularly limited, and illustratively include: polypropylene glycol: model: S24146, which can be purchased from Shanghai Yuanye Biotechnology Co., Ltd.; polyester fiber: 100D; polyurethane fiber: polyurethane elastic fiber (spandex) 5%: 70D.

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

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

[0025] 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole, and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min to obtain a mixed solution; 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min, and the mixed solution was added, stirred at 28° C. for 65 min, aged for 24 h, washed, and dried to obtain a metal organic framework material;

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

[0027] Take the metal organic framework material prepared in step 1, 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 evenly, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir evenly, then dropwise add ammonia aqueous solution, adjust the pH value to 9.0, heat to 68°C, react for 4.5 hours, wash with water, and dry to obtain a modified metal organic framework material;

[0028] Step 3: Preparation of polyurethane emulsion:

[0029] Take 5.5g of acetone oxime and 30mL of acetone, stir evenly to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir evenly, heat to 52°C, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, dropwise add acetone oxime solution, continue to react for 2.5h, cool to 28°C, add 1.6g of triethylamine, react for 30min, remove the solvent, and obtain a 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 woven suede fabric:

[0031] Taking polyester fiber as warp and polyurethane fiber as weft, weaving to obtain base fabric;

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

[0033] The base fabric is impregnated with the impregnation liquid for 8 minutes, taken out, and introduced into a magnetic field, the magnetic field direction is set horizontally with the base fabric, the magnetic field intensity is 230mT, and the reaction is carried out for 25 minutes; washed and dried to obtain the treated base fabric; the treated base fabric is subjected to acupuncture, heat setting, sanding, and shearing treatment to obtain a woven suede fabric with a thickness of 0.4mm;

[0034] When the woven fabric is woven, the warp density is 58 strands / cm and the weft density is 38 strands / cm;

[0035] The bath ratio of base fabric to impregnation liquid is 1:11;

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

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

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

[0039] Take 0.03g of hexachlorocyclotriphosphazene, 2g of 2-methylimidazole, and 100mL of methanol, and ultrasonically disperse for 20min to obtain a mixed solution; take 2.2g of zinc nitrate hexahydrate and 100mL of methanol, and ultrasonically disperse for 20min, add the mixed solution, stir at 25°C for 60min, age for 22h, 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 1, 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 evenly, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir evenly, then dropwise add ammonia aqueous solution, adjust the pH value to 8.8, heat to 65°C, react for 4 h, wash with water, and dry to obtain a modified metal organic framework material;

[0042] Step 3: Preparation of polyurethane emulsion:

[0043] Take 5.5g of acetone oxime and 30mL of acetone, stir evenly to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir evenly, heat to 50°C, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2h, add 1.8g of benzoin dimethyl ether, react for 2h, dropwise add acetone oxime solution, continue to react for 2h, cool to 25°C, add 1.6g of triethylamine, react for 20min, remove the solvent, and obtain a 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 woven suede fabric:

[0045] Taking polyester fiber as warp and polyurethane fiber as weft, weaving to obtain base fabric;

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

[0047] The base fabric is impregnated with the impregnation liquid for 5 minutes, taken out, and introduced into a magnetic field, the magnetic field direction is set horizontally with the base fabric, the magnetic field intensity is 220mT, and the reaction is carried out for 20 minutes; washed and dried to obtain the treated base fabric; the treated base fabric is subjected to acupuncture, heat setting, sanding, and shearing treatment to obtain a woven suede fabric with a thickness of 0.4mm;

[0048] When the woven fabric is woven, the warp density is 54 strands / cm and the weft density is 36 strands / cm;

[0049] The bath ratio of base fabric to impregnation liquid is 1:10;

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

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

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

[0053] 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole, and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 30 min to obtain a mixed solution; 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 30 min, and the mixed solution was added, stirred at 30° C. for 70 min, aged for 26 h, washed, and dried to obtain a metal organic framework material;

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

[0055] Take the metal organic framework material prepared in step 1, 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 evenly, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir evenly, then dropwise add ammonia aqueous solution, adjust the pH value to 9.5, heat to 70°C, react for 5 h, wash with water, and dry to obtain a modified metal organic framework material;

[0056] Step 3: Preparation of polyurethane emulsion:

[0057] Take 5.5g of acetone oxime and 30mL of acetone, stir evenly to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir evenly, heat to 55°C, add 16g of 4,4'-diphenylmethane diisocyanate, react for 3h, add 1.8g of benzoin dimethyl ether, react for 3h, dropwise add acetone oxime solution, continue to react for 3h, cool to 30°C, add 1.6g of triethylamine, react for 40min, remove the solvent, and obtain a 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 woven suede fabric:

[0059] Taking polyester fiber as warp and polyurethane fiber as weft, weaving to obtain base fabric;

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

[0061] The base fabric is impregnated with the impregnation liquid for 10 minutes, taken out, and introduced into a magnetic field, the magnetic field direction is set horizontally with the base fabric, the magnetic field intensity is 240mT, and the reaction is carried out for 30 minutes; washed and dried to obtain the treated base fabric; the treated base fabric is subjected to acupuncture, heat setting, sanding, and shearing treatment to obtain a woven suede fabric with a thickness of 0.4mm;

[0062] When the woven fabric is woven, the warp density is 62 strands / cm and the weft density is 40 strands / cm;

[0063] The bath ratio of base fabric to impregnation liquid is 1:10;

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

[0065] Comparative Example 1: The metal organic framework material was not treated with phytic acid, and the rest was the same as Example 1:

[0066] A preparation process of a woven suede fabric comprises the following steps:

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

[0068] 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole, and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min to obtain a mixed solution; 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min, and the mixed solution was added, stirred at 28° C. for 65 min, aged for 24 h, washed, and dried to obtain a metal organic framework material;

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

[0070] Take the metal organic framework material prepared in step 1, 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 evenly, then dropwise add an ammonia solution, adjust the pH value to 9.0, heat to 68°C, react for 4.5 hours, wash with water, and dry to obtain a modified metal organic framework material;

[0071] Step 3: Preparation of polyurethane emulsion:

[0072] Take 5.5g of acetone oxime and 30mL of acetone, stir evenly to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir evenly, heat to 52°C, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, dropwise add acetone oxime solution, continue to react for 2.5h, cool to 28°C, add 1.6g of triethylamine, react for 30min, remove the solvent, and obtain a 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 woven suede fabric:

[0074] Taking polyester fiber as warp and polyurethane fiber as weft, weaving to obtain base fabric;

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

[0076] The base fabric is impregnated with the impregnation liquid for 8 minutes, taken out, and introduced into a magnetic field, the magnetic field direction is set horizontally with the base fabric, the magnetic field intensity is 230mT, and the reaction is carried out for 25 minutes; washed and dried to obtain the treated base fabric; the treated base fabric is subjected to acupuncture, heat setting, sanding, and shearing treatment to obtain a woven suede fabric with a thickness of 0.4mm;

[0077] When the woven fabric is woven, the warp density is 58 strands / cm and the weft density is 38 strands / cm;

[0078] The bath ratio of base fabric to impregnation liquid is 1:11;

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

[0080] Comparative Example 2: No ferrous sulfate heptahydrate or ferric chloride hexahydrate was added, and the rest was the same as Example 1:

[0081] A preparation process of a woven suede fabric comprises the following steps:

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

[0083] 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole, and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min to obtain a mixed solution; 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min, and the mixed solution was added, stirred at 28° C. for 65 min, aged for 24 h, washed, and dried to obtain a metal organic framework material;

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

[0085] Take the metal organic framework material prepared in step 1, 1.6 g of copper sulfate pentahydrate, and 200 mL of deionized water, stir evenly, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir evenly, then drop ammonia aqueous solution, adjust the pH value to 9.0, heat to 68°C, react for 4.5 hours, wash with water, and dry to obtain a modified metal organic framework material;

[0086] Step 3: Preparation of polyurethane emulsion:

[0087] Take 5.5g of acetone oxime and 30mL of acetone, stir evenly to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir evenly, heat to 52°C, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, dropwise add acetone oxime solution, continue to react for 2.5h, cool to 28°C, add 1.6g of triethylamine, react for 30min, remove the solvent, and obtain a 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 woven suede fabric:

[0089] Taking polyester fiber as warp and polyurethane fiber as weft, weaving to obtain base fabric;

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

[0091] The base fabric is impregnated with the impregnation liquid for 8 minutes, taken out, and introduced into a magnetic field, the magnetic field direction is set horizontally with the base fabric, the magnetic field intensity is 230mT, and the reaction is carried out for 25 minutes; washed and dried to obtain the treated base fabric; the treated base fabric is subjected to acupuncture, heat setting, sanding, and shearing treatment to obtain a woven suede fabric with a thickness of 0.4mm;

[0092] When the woven fabric is woven, the warp density is 58 strands / cm and the weft density is 38 strands / cm;

[0093] The bath ratio of base fabric to impregnation liquid is 1:11;

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

[0095] Comparative Example 3: No magnetic field is introduced, and the rest is the same as Example 1:

[0096] A preparation process of a woven suede fabric comprises the following steps:

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

[0098] 0.03 g of hexachlorocyclotriphosphazene, 2 g of 2-methylimidazole, and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min to obtain a mixed solution; 2.2 g of zinc nitrate hexahydrate and 100 mL of methanol were taken, and ultrasonic dispersion was performed for 25 min, and the mixed solution was added, stirred at 28° C. for 65 min, aged for 24 h, washed, and dried to obtain a metal organic framework material;

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

[0100] Take the metal organic framework material prepared in step 1, 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 evenly, add 6 g of phytic acid aqueous solution with a concentration of 0.005 mmol / L, stir evenly, then dropwise add ammonia aqueous solution, adjust the pH value to 9.0, heat to 68°C, react for 4.5 hours, wash with water, and dry to obtain a modified metal organic framework material;

[0101] Step 3: Preparation of polyurethane emulsion:

[0102] Take 5.5g of acetone oxime and 30mL of acetone, stir evenly to obtain an acetone oxime solution; take 5g of hydroxypropyl silicone oil, 30g of polypropylene glycol, and 30mL of acetone, stir evenly, heat to 52°C, add 16g of 4,4'-diphenylmethane diisocyanate, react for 2.5h, add 1.8g of benzoin dimethyl ether, react for 2.5h, dropwise add acetone oxime solution, continue to react for 2.5h, cool to 28°C, add 1.6g of triethylamine, react for 30min, remove the solvent, and obtain a 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 woven suede fabric:

[0104] Taking polyester fiber as warp and polyurethane fiber as weft, weaving to obtain base fabric;

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

[0106] The base fabric is impregnated with the impregnation liquid for 8 minutes, taken out, washed, and dried to obtain the treated base fabric; the treated base fabric is subjected to acupuncture, heat setting, sanding, and shearing to obtain a woven suede fabric with a thickness of 0.4 mm;

[0107] When the woven fabric is woven, the warp density is 58 strands / cm and the weft density is 38 strands / cmm;

[0108] The bath ratio of base fabric to impregnation liquid is 1:11;

[0109] The impregnation solution includes the following components, by weight: 65 parts of polyurethane emulsion, 5 parts of modified metal organic framework material, 6 parts of organic solvent butyl ester, 2 parts of dye, and 1.5 parts of 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, and the warp tensile breaking strength test was performed on the woven suede fabric; then the limiting oxygen index was tested to characterize the flame retardant performance, and the obtained data are shown in the following table:

[0112] Tensile strength at break / N LOI / % 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: From the comparison of the data in the table, it can be seen that in Comparative Example 1, phytic acid is not used to treat the metal organic framework material, the metal ion load is reduced, and the flame retardancy of the woven suede fabric decreases. In Comparative Example 2, ferric sulfate heptahydrate and ferric chloride hexahydrate are not added, and the flame retardancy of the woven suede fabric deteriorates. In Comparative Example 3, no magnetic field is introduced. At this time, the modified metal organic framework material is unevenly dispersed, and the flame retardant performance of the woven suede fabric deteriorates. In Examples 1 to 3 of the present invention, an impregnation liquid is used to impregnate the base cloth to prepare a woven suede fabric with excellent flame retardancy. Modified metal organic framework materials are added to the impregnation liquid, and the metal organic framework material has excellent thermal stability. The present invention uses 2-methylimidazole and zinc nitrate as raw materials, and then encapsulates hexachlorocyclotriphosphazene with good flame retardant effect into the metal organic framework material, which further enhances the flame retardant effect of the metal organic framework material, thereby improving the flame retardant performance of the woven suede fabric. Embodiment 1 of the present invention uses phytic acid to process metal organic framework materials, and then adds copper sulfate pentahydrate, and through the chelating performance of phytic acid to metal ions, more metal ions can be chelated, and the effect of catalytic carbonization is achieved. The addition of ferrous sulfate heptahydrate and ferric chloride hexahydrate makes the modified metal organic framework material load magnetic ferrosoferric oxide particles, and improves the dispersibility of the modified metal organic framework material in the matrix. After the base fabric is impregnated, the present invention introduces a magnetic field, and the magnetic ferrosoferric oxide particles loaded on the modified metal organic framework material are subjected to the magnetic field, so as to be evenly distributed on the base fabric surface, and the dispersibility of the modified metal organic framework material is enhanced, so as to improve the flame retardant properties of woven suede fabrics.

[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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A process for preparing a woven suede fabric, characterized in that: The following steps are involved: Step 1: Take polyester fiber as warp and polyurethane fiber as weft, weave to obtain base fabric; Step 2: taking polyurethane emulsion, modified metal organic framework material, organic solvent, dye, and surfactant, stirring evenly to obtain an impregnation solution; Step 3: Use the impregnation liquid to impregnate the base fabric for 5-10 minutes, take it out, introduce a magnetic field, set the direction of the magnetic field and the base fabric horizontally, react for 20-30 minutes, then wash and dry to obtain the treated base fabric; Step 4: The treated base fabric is subjected to needle punching, heat setting, sanding and shearing treatments to obtain a woven suede fabric.

2. The process for preparing a woven suede fabric according to claim 1, characterized in that: The preparation method of the modified metal organic framework material is as follows: taking the metal organic framework material, copper sulfate pentahydrate, ferric sulfate heptahydrate, ferric chloride hexahydrate, and deionized water, stirring evenly, adding a phytic acid aqueous solution, stirring evenly, then dripping an ammonia aqueous solution, adjusting the pH value to 8.8-9.5, heating to 65-70° C., reacting for 4-5 hours, washing with water, and drying to obtain the modified metal organic framework material.

3. The process for preparing a woven suede fabric according to claim 2, characterized in that: The preparation method of the metal organic framework material is as follows: taking hexachlorocyclotriphosphazene, 2-methylimidazole and methanol, ultrasonically dispersing for 20-30 minutes to obtain a mixed solution; taking zinc nitrate hexahydrate and methanol, ultrasonically dispersing for 20-30 minutes, adding the mixed solution, stirring at 25-30° C. for 60-70 minutes, aging for 22-26 hours, washing and drying to obtain the metal organic framework material.

4. The process for preparing a woven suede fabric according to claim 1, characterized in that: The preparation method of the polyurethane emulsion comprises the following steps: taking acetone oxime and acetone, stirring evenly to obtain an acetone oxime solution; taking hydroxypropyl silicone oil, polypropylene glycol and acetone, stirring evenly, heating to 50-55° C., adding 4,4'-diphenylmethane diisocyanate, reacting for 2-3 hours, adding benzoin dimethyl ether, reacting for 2-3 hours, dripping the acetone oxime solution, continuing to react for 2-3 hours, cooling to 25-30° C., adding triethylamine, reacting for 20-40 minutes, removing the solvent, and obtaining a prepolymer; taking the prepolymer, deionized water and sodium dodecyl sulfate, emulsifying for 30-40 minutes, and obtaining the polyurethane emulsion.

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

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

7. The process for preparing a woven suede fabric according to claim 5, characterized in that: The surfactant is fatty alcohol polyoxyethylene ether.

8. The process for preparing a woven suede fabric according to claim 1, characterized in that: In step 1, when the fabric is being woven, the warp density is 54-62 strands / cm, and the weft density is 36-40 strands / cm.

9. A woven suede fabric prepared according to the process for preparing a woven suede fabric according to any one of claims 1 to 8.