CN112239957B - Preparation method of cow leather mat applying vegetable dye - Google Patents

Preparation method of cow leather mat applying vegetable dye Download PDF

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Publication number
CN112239957B
CN112239957B CN201910639105.4A CN201910639105A CN112239957B CN 112239957 B CN112239957 B CN 112239957B CN 201910639105 A CN201910639105 A CN 201910639105A CN 112239957 B CN112239957 B CN 112239957B
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dye
plant dye
plant
preparing
cow leather
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CN112239957A (en
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仇兆波
沈守兵
宋春常
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Shanghai Shuixing Home Textile Co Ltd
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Shanghai Shuixing Home Textile Co Ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/34—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using natural dyestuffs
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
    • D06P1/5257—(Meth)acrylic acid
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
    • D06P1/5285—Polyurethanes; Polyurea; Polyguanides
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/64—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
    • D06P1/651—Compounds without nitrogen
    • D06P1/65106—Oxygen-containing compounds
    • D06P1/65131—Compounds containing ether or acetal groups
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/653—Nitrogen-free carboxylic acids or their salts
    • D06P1/6533—Aliphatic, araliphatic or cycloaliphatic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds
    • D06P1/67383—Inorganic compounds containing silicon
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/02—Material containing basic nitrogen
    • D06P3/04—Material containing basic nitrogen containing amide groups
    • D06P3/32—Material containing basic nitrogen containing amide groups leather skins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
    • D06P5/30—Ink jet printing

Abstract

The invention relates to a preparation method of a cow leather mat applying vegetable dye. It comprises the following steps: (1) preparing and preparing the plant dye color paste according to the weight percentage: 30-50% of vegetable dye, 10-15% of water-based resin, 5-10% of dispersing agent, 5-10% of propylene glycol methyl ether, 0.5-1% of anti-settling agent and the balance of deionized water; (2) preparing and preparing the plant dye printing ink according to the weight percentage: 8-10% of vegetable dye, 10-25% of viscosity regulator, 5-15% of cosolvent, 0.5-4% of surface tension regulator, 1-3% of pH regulator, 4-8% of humectant, 0.5-1% of bactericide, 2-8% of color fixing agent, 0.5-1% of antioxidant and the balance of deionized water; (3) spraying plant dye color paste on the cow leather mat; (4) and carrying out plant dye printing ink jet drawing on the cow leather mat to obtain a final product.

Description

Preparation method of cow leather mat applying vegetable dye
Technical Field
The invention relates to a preparation method of a cow leather mat, and particularly discloses a preparation method of a cow leather mat by using a plant dye.
Background
The leather is animal skin which is obtained by physical and chemical processing such as unhairing, tanning and the like, has protein denaturation and is not easy to rot. At present, in the field of home textiles, leather is mainly applied to manufacturing of sofa leather and summer sleeping mat leather, wherein the cow leather summer sleeping mat belongs to a leather product which is high in price, excellent in quality, good in durability and popular with consumers in summer.
The dyes used for dyeing and printing the cow leather mat are generally synthetic chemical dyes, most of which belong to aromatic amine compounds, and the substances can cause certain adverse effects on human bodies and the environment. The environmental pollution problem of synthetic dyes in the production and application processes is more and more concerned by people, so that the application performance of natural vegetable dyes is valued by people due to the advantages of environmental protection, safety, no toxicity and the like.
The natural plant dye has wide plant sources in China and manual dyeing experience for thousands of years, and provides a good foundation for industrial application of the natural plant dye. The application of the natural vegetable dye is beneficial to improving the added value of the textile, and has obvious economic benefit and social benefit.
At present, natural vegetable dyes have not been applied to leather dyeing and printing in a large-scale industrialization mode. The limited application is due to the leather surface's difficulty in absorbing natural dyes.
The publication number is: CN201710693837 patent application discloses a leather dyeing method using plant primary color dye, which mainly comprises the main steps of preparation of plant dye, coating and dyeing of rare earth mordant dyed leather, acid softening, fixation, wax sealing and the like, so as to realize a leather dyeing method using plant primary color dye, which is green, environment-friendly, high in color fastness and not easy to fade, and has the defects that the dyeing process is more traditional, the dye utilization rate is low, and the dyeing or printing design of complex color patterns cannot be realized.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a preparation method of a cationic modified cow leather mat dyed by a vegetable dye, which improves the dyeing performance of the vegetable dye on leather by carrying out cationic modification treatment on the cow leather mat.
The invention is realized by the following steps: a preparation method of a cow leather mat applying vegetable dye comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 30-50% of vegetable dye, 10-15% of water-based resin, 5-10% of dispersing agent, 5-10% of propylene glycol methyl ether, 0.5-1% of anti-settling agent and the balance of deionized water;
preparing the plant dye color paste: sequentially adding the water-based resin, propylene glycol methyl ether and deionized water into a stirring container of a high-speed dispersion machine in sequence, uniformly stirring and dispersing at the speed of 3000-5000 r/min, then continuously adding the dispersing agent, stirring and dispersing for 10-30 min, finally adding the plant dye and the anti-settling agent, dispersing for 30-60 min at 1500-2000 r/min, and forming uniformly dispersed plant dye color paste, wherein the grinding fineness of the color paste is 5-10 mu m;
(2) preparing plant dye printing ink according to the weight percentage: 8-10% of vegetable dye, 10-25% of viscosity regulator, 5-15% of cosolvent, 0.5-4% of surface tension regulator, 1-3% of pH regulator, 4-8% of humectant, 0.5-1% of bactericide, 2-8% of color fixing agent, 0.5-1% of antioxidant and the balance of deionized water;
preparing plant dye printing ink, adding the plant dye, a viscosity regulator, a surface tension regulator, a humectant, a cosolvent, a bactericide, an antioxidant, a color fixing agent and a pH regulator into deionized water in sequence, stirring uniformly, heating to 50-80 ℃, continuously stirring for 60min, keeping the temperature, curing for 2-3 h, cooling to normal temperature, and filtering the solution through membranes with the pore diameters of 0.4 mu m and 0.2 mu m in sequence to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 6-7;
(3) carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the repairing paste on a rolling belt of an automatic rotary spraying machine, passing through a spraying chamber and an oven chamber at a constant speed, repeatedly spraying 20-30% of the plant dye color paste obtained in the step (1), 30-40% of the composite resin, 3-8% of the coating auxiliary agent and the balance of deionized water for 2-3 times according to the weight percentage, and spraying 1-2 times of the brightener to obtain the plant dye-coated cow leather mat;
(4) carrying out plant dye printing ink spray painting on the cow leather mat: and (3) placing the leather coated with the ground color on a digital flat printer, placing plant dye printing ink according to the spray painting pattern color system, spray painting and printing, and coating by using a brightener to obtain a final product.
In the step (1) and the step (2), the plant dye is one or more of gardenia yellow natural dye, turmeric natural dye, sophora flower bud yellow natural dye, madder red natural dye, catechin red natural dye, horse blue natural dye and isatis indigotica natural dye.
In the step (1), the water-based resin is one of acrylic resin, polyurethane resin or composite resin; the dispersing agent is one or more of polyacrylic acid ammonium salt, polyoxyethylene sorbitan fatty acid ester or sodium polycarboxylate; the anti-settling agent is fumed silica.
In the step (2), the viscosity regulator is one or more of polyethylene glycol, alkylphenol ethoxylates or lauramidopropyl hydroxysulfobetaine; the cosolvent is one or more of polypropylene glycol, potassium phosphate polyether ester or tripropylene glycol monomethyl ether; the surface tension regulator is a modified polydimethylsiloxane surfactant; the humectant is one or more of ethylene glycol or glycerol; the bactericide is one or more of polyhexamethylene guanidine or quaternary ammonium salt; the pH regulator is one of sodium bicarbonate, sodium carbonate or citric acid; the color fixing agent is one or more of butyl acetate cellulose or modified polyurea polymer; the antioxidant is one or more of polyoxyethylene or phosphite ester.
In the step (3), the aperture of the spray head of the automatic rotary spraying machine is 50-100 mu m, the rotating speed of the spray head bracket is 30-60 r/min, the speed of the rolling belt is 20-30 m/min, and the temperature of the oven chamber is 70-80 ℃.
The composite resin in the step (3) is anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
The spray head of the digital flat-panel printer in the step (4) is 4pass-12pass, and the printing speed is 10m2/h-25m2And h, the minimum ink drop is 7pL-10 pL.
In the step (4), the brightener is an aliphatic glossy polyurethane brightener with a solid content of 25-30%.
The invention has the beneficial effects that: the natural plant dye is obtained by purifying and solidifying various plant extracts in nature, and can fully utilize natural resources. The vegetable dye pigment is not added chemically, and the leather obtained by dyeing has the advantages of environmental protection, health, safety, harmlessness, natural color and the like, so that the ecological functionality of the cow leather mat is fully improved;
the invention optimizes and improves the preparation methods of the plant dye color paste and the plant dye printing ink, further strengthens the application field of the plant dye in the market, in particular the application in the leather finishing field;
compared with the traditional drum dyeing method, the application of the plant dye on the cowhide leather, the preparation of the plant dye color paste and the plant dye printing ink and the method for treating the cowhide leather are simple, the dye utilization rate is high, waste liquid is hardly generated, and both a leather product and a production process are more environment-friendly and ecological.
Detailed Description
The invention relates to a preparation method of a cow leather mat applying vegetable dye, which comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 30-50% of vegetable dye, 10-15% of water-based resin, 5-10% of dispersing agent, 5-10% of propylene glycol methyl ether, 0.5-1% of anti-settling agent and the balance of deionized water;
preparing the plant dye color paste: sequentially adding the water-based resin, propylene glycol methyl ether and deionized water into a stirring container of a high-speed dispersion machine in sequence, uniformly stirring and dispersing at the speed of 3000-5000 r/min, then continuously adding the dispersing agent, stirring and dispersing for 10-30 min, finally adding the plant dye and the anti-settling agent, dispersing for 30-60 min at 1500-2000 r/min, and forming uniformly dispersed plant dye color paste, wherein the grinding fineness of the color paste is 5-10 mu m;
wherein the plant dye is one or more of gardenia yellow natural dye, turmeric natural dye, sophora flower bud yellow natural dye, madder red natural dye, catechin red natural dye, India tinctoria blue natural dye or isatis tinctoria blue natural dye;
the water-based resin is one of acrylic resin, polyurethane resin or composite resin; the dispersing agent is one or more of polyacrylic acid ammonium salt, polyoxyethylene sorbitan fatty acid ester or sodium polycarboxylate; the anti-settling agent is fumed silica.
(2) Preparing plant dye printing ink according to the weight percentage: 8-10% of vegetable dye, 10-25% of viscosity regulator, 5-15% of cosolvent, 0.5-4% of surface tension regulator, 1-3% of pH regulator, 4-8% of humectant, 0.5-1% of bactericide, 2-8% of color fixing agent, 0.5-1% of antioxidant and the balance of deionized water;
preparing plant dye printing ink, adding the plant dye, a viscosity regulator, a surface tension regulator, a humectant, a cosolvent, a bactericide, an antioxidant, a color fixing agent and a pH regulator into deionized water in sequence, stirring uniformly, heating to 50-80 ℃, continuously stirring for 60min, keeping the temperature, curing for 2-3 h, cooling to normal temperature, and filtering the solution through membranes with the pore diameters of 0.4 mu m and 0.2 mu m in sequence to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 6-7.
Wherein the plant dye is one or more of gardenia yellow natural dye, turmeric natural dye, sophora flower bud yellow natural dye, madder red natural dye, catechin red natural dye, India tinctoria blue natural dye or isatis tinctoria blue natural dye;
the viscosity regulator is one or more of polyethylene glycol, alkylphenol polyoxyethylene or lauramide propyl hydroxysulfobetaine; the cosolvent is one or more of polypropylene glycol, potassium phosphate polyether ester or tripropylene glycol monomethyl ether; the surface tension regulator is a modified polydimethylsiloxane surfactant; the humectant is one or more of ethylene glycol or glycerol; the bactericide is one or more of polyhexamethylene guanidine or quaternary ammonium salt; the pH regulator is one of sodium bicarbonate, sodium carbonate or citric acid; the color fixing agent is one or more of butyl acetate cellulose or modified polyurea polymer; the antioxidant is one or more of polyoxyethylene or phosphite ester.
(3) Carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the repairing paste on a rolling belt of an automatic rotary spraying machine, passing through a spraying chamber and an oven chamber at a constant speed, repeatedly spraying 20-30% of the plant dye color paste obtained in the step (1), 30-40% of the composite resin, 3-8% of the coating auxiliary agent and the balance of deionized water for 2-3 times according to the weight percentage, and spraying 1-2 times of the brightener to obtain the plant dye-coated cow leather mat;
wherein the aperture of a spray head of the automatic rotary spraying machine is 50-100 mu m, the rotating speed of a spray head bracket is 30-60 r/min, the speed of a rolling belt is 20-30 m/min, and the temperature of an oven chamber is 70-80 ℃;
the composite resin is anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
(4) Carrying out plant dye printing ink spray painting on the cow leather mat: placing the leather coated with the ground color on a digital flat printer, placing plant dye printing ink according to the spray painting pattern color system, spray painting and printing, and coating by using a brightener to obtain a final product;
the spray head of the digital flat-panel printer is 4pass-12pass, and the printing speed is 10m2/h-25m 2The minimum ink drop is 7pL-10 pL;
the brightener is an aliphatic brightening polyurethane brightener with a solid content of 25-30%.
The invention is further illustrated by the following specific examples.
The first embodiment is as follows:
the embodiment comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 30% of turmeric natural dye, 10% of polyurethane resin, 5% of sodium polycarboxylate, 5% of propylene glycol methyl ether, 0.5% of fumed silica and 49.5% of deionized water.
Preparing the plant dye color paste: sequentially adding 10% of polyurethane resin, 5% of propylene glycol methyl ether and 49.5% of deionized water into a stirring container of a high-speed dispersion machine, uniformly stirring and dispersing at the speed of 3000r/min, then continuously adding 5% of the sodium polycarboxylate, stirring and dispersing for 10min, finally adding 30% of turmeric natural dye and 0.5% of fumed silica, dispersing for 30min at 1500r/min, and forming uniformly dispersed plant dye color paste, wherein the grinding fineness of the color paste is 9 mu m.
(2) Preparing plant dye printing ink according to the weight percentage: 10% of a horse blue natural dye, 10% of polyethylene glycol, 5% of polypropylene glycol, 0.5% of a modified polydimethylsiloxane surfactant, 1% of citric acid, 4% of glycerol, 0.5% of polyhexamethylene guanidine, 2% of butyl acetate cellulose, 0.5% of polyoxyethylene and 66.5% of deionized water.
Preparing plant dye printing ink, sequentially adding 10% of a natural dye of the kale, 10% of polyethylene glycol, 0.5% of a modified polydimethylsiloxane surfactant, 4% of glycerol, 5% of polypropylene glycol, 0.5% of polyhexamethylene guanidine, 0.5% of polyoxyethylene, 2% of butyl acetate cellulose and 1% of citric acid into 66.5% of deionized water, uniformly stirring, heating to 60 ℃, continuously stirring for 60min, carrying out heat preservation curing for 2h, cooling to normal temperature, and sequentially filtering the solution through membranes with the pore diameter of 0.4 mu m and 0.2 mu m to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 7;
(3) carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the mending paste on a rolling belt of an automatic rotary spraying machine, wherein the aperture of a spray head is 50 mu m, the rotating speed of a spray head bracket is 60r/min, and the speed of the rolling belt is 20 m/min; passing through a spraying chamber and an oven chamber at a constant speed, wherein the temperature of the oven chamber is 80 ℃; repeatedly spraying 20% of the plant dye color paste obtained in the step (1), 40% of the composite resin, 8% of the coating auxiliary agent and the balance of deionized water for 3 times and spraying 2 times of the brightener to obtain the plant dye-coated cowhide mat; the composite resin is anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
(4) Carrying out plant dye printing ink spray painting on the cow leather mat: the leather coated with the ground color is placed on a digital flat printer, wherein the spray head of the digital flat printer is 4pass, and the printing speed is 25m2H, the minimum ink drop is 7 pL; according to the color system of the spray painting pattern, plant dye printing ink is placed, spray painting and printing are carried out, and then the final product is obtained after the plant dye printing ink is coated by a brightener. Wherein the brightener is an aliphatic brightening polyurethane brightener with solid content of 30%.
Example two:
the embodiment comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 40% of turmeric natural dye, 15% of polyurethane resin, 10% of sodium polycarboxylate, 8% of propylene glycol methyl ether, 0.8% of fumed silica and 26.2% of deionized water.
Preparing the plant dye color paste: sequentially adding 15% of polyurethane resin, 8% of propylene glycol methyl ether and 26.2% of deionized water into a stirring container of a high-speed dispersion machine in sequence, uniformly stirring and dispersing at the speed of 3000r/min, then continuously adding 10% of sodium polycarboxylate, stirring and dispersing for 10min, finally adding 40% of turmeric natural dye and 0.8% of fumed silica, dispersing for 30min at 1500r/min to form uniformly dispersed plant dye color paste, wherein the grinding fineness of the color paste is 10 microns;
(2) preparing plant dye printing ink according to the weight percentage: 10% of a horse blue natural dye, 15% of polyethylene glycol, 10% of polypropylene glycol, 2% of a modified polydimethylsiloxane surfactant, 2% of citric acid, 6% of glycerol, 1% of polyhexamethylene guanidine, 5% of butyl acetate cellulose, 0.5% of polyoxyethylene and 48.5% of deionized water;
preparing plant dye printing ink, namely sequentially adding 10% of the indigenous dye of the kale, 15% of polyethylene glycol, 2% of modified polydimethylsiloxane surfactant, 6% of glycerol, 10% of polypropylene glycol, 1% of polyhexamethylene guanidine, 0.5% of polyoxyethylene, 5% of butyl acetate cellulose and 2% of citric acid into 48.5% of deionized water, uniformly stirring, heating to 70 ℃, continuously stirring for 60min, carrying out heat preservation curing for 2h, cooling to normal temperature, and sequentially filtering the solution through membranes with the pore diameter of 0.4 mu m and 0.2 mu m to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 6.
(3) Carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the mending paste on a rolling belt of an automatic rotary spraying machine, wherein the aperture of a spray head of the automatic rotary spraying machine is 80 mu m, the rotating speed of a spray head support is 50r/min, the speed of the rolling belt is 25m/min, the cow leather passes through a spraying chamber and an oven chamber at a constant speed, and the temperature of the oven chamber is 80 ℃; repeatedly spraying 30% of the plant dye color paste obtained in the step (1), 40% of the composite resin, 8% of the coating auxiliary agent and the balance of deionized water for 2 times according to the weight percentage, and spraying 2 times of the brightener to obtain the plant dye-coated cowhide mat;
wherein the composite resin is an anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
(4) Carrying out plant dye printing ink spray painting on the cow leather mat: the leather coated with the ground color is placed on a digital flat printer, wherein the spray head of the digital flat printer is 4pass, and the printing speed is 25m2H, the minimum ink drop is 8 pL; according to the color system of the spray painting pattern, placing plant dye printing ink, performing spray painting and printing, and then coating by using a brightener to obtain a final product; the brightener is an aliphatic brightening polyurethane brightener with solid content of 30%.
Example three:
the embodiment comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 50% of turmeric natural dye, 15% of polyurethane resin, 10% of sodium polycarboxylate, 10% of propylene glycol methyl ether, 1% of fumed silica and 14% of deionized water.
Preparing the plant dye color paste: sequentially adding 15% of polyurethane resin, 10% of propylene glycol methyl ether and 14% of deionized water into a stirring container of a high-speed dispersion machine in sequence, uniformly stirring and dispersing at the speed of 3000r/min, then continuously adding 10% of sodium polycarboxylate, stirring and dispersing for 10min, finally adding 50% of turmeric natural dye and 1% of fumed silica, dispersing for 30min at 1500r/min to form uniformly dispersed plant dye color paste, wherein the grinding fineness of the color paste is 10 microns;
(2) preparing plant dye printing ink according to the weight percentage: 10% of a horse blue natural dye, 20% of polyethylene glycol, 12% of polypropylene glycol, 3% of a modified polydimethylsiloxane surfactant, 2.5% of citric acid, 8% of glycerol, 1% of polyhexamethylene guanidine, 5% of butyl acetate cellulose, 1% of polyoxyethylene and 37.5% of deionized water.
Preparing plant dye printing ink, namely adding 10% of the indigenous dye of the kale, 20% of polyethylene glycol, 3% of modified polydimethylsiloxane surfactant, 8% of glycerol, 12% of polypropylene glycol, 1% of polyhexamethylene guanidine, 1% of polyoxyethylene, 5% of butyl acetate cellulose and 2.5% of citric acid into 37.5% of deionized water in sequence, stirring uniformly, heating to 80 ℃, continuing to stir for 60min, preserving heat and curing for 3h, cooling to normal temperature, and filtering the solution through membranes with the aperture of 0.4 mu m and the aperture of 0.2 mu m in sequence to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 6.
(3) Carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the mending paste on a rolling belt of an automatic rotary spraying machine, wherein the aperture of a spray head of the automatic rotary spraying machine is 80 mu m, the rotating speed of a spray head support is 30r/min, the speed of the rolling belt is 30m/min, the cow leather passes through a spraying chamber and an oven chamber at a constant speed, and the temperature of the oven chamber is 80 ℃; repeatedly spraying 20% of the plant dye color paste obtained in the step (1), 30% of the composite resin, 8% of the coating auxiliary agent and the balance of deionized water for 3 times and spraying 1 time of the brightener to obtain the plant dye-coated cowhide mat;
wherein the composite resin is an anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
(4) Carrying out plant dye printing ink spray painting on the cow leather mat: the leather coated with the ground color is placed on a digital flat printer, wherein the spray head of the digital flat printer is 4pass, and the printing speed is 25m2H, the minimum ink drop is 10 pL; according to the color system of the spray painting pattern, placing plant dye printing ink, performing spray painting and printing, and then coating by using a brightener to obtain a final product; the brightener is an aliphatic brightening polyurethane brightener with solid content of 30%.
Example four:
the embodiment comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 20% of gardenia yellow natural dye, 10% of isatis indigotica fort natural dye, 10% of polyurethane resin, 8% of polyacrylic ammonium salt, 10% of propylene glycol methyl ether, 1% of fumed silica and 41% of deionized water.
Preparing the plant dye color paste: sequentially adding 10% of polyurethane resin, 10% of propylene glycol methyl ether and 41% of deionized water into a stirring container of a high-speed dispersion machine in sequence, uniformly stirring and dispersing at the speed of 3000r/min, then continuously adding 8% of polyacrylic acid ammonium salt, stirring and dispersing for 20min, finally adding 20% of gardenia yellow natural dye, 10% of isatis indigotica fort natural dye and 1% of fumed silica, dispersing for 30min at the speed of 2000r/min to form uniformly dispersed plant dye color paste, wherein the grinding fineness of the color paste is 8 mu m;
(2) preparing plant dye printing ink according to the weight percentage: 2% of a horse blue natural dye, 7% of a madder red natural dye, 20% of lauramidopropyl hydroxysulfobetaine, 8% of polypropylene glycol, 4% of tripropylene glycol monomethyl ether, 3% of a modified polydimethylsiloxane surfactant, 2.5% of citric acid, 8% of ethylene glycol, 1% of a quaternary ammonium salt, 5% of a modified polyurea polymer, 1% of a phosphite ester and 38.5% of deionized water.
Preparing plant dye printing ink, namely adding 2% of the horse blue natural dye, 7% of the madder red natural dye, 20% of lauramidopropyl hydroxysulfobetaine, 8% of polypropylene glycol, 4% of tripropylene glycol monomethyl ether, 3% of modified polydimethylsiloxane surfactant, 2.5% of citric acid, 8% of ethylene glycol, 1% of quaternary ammonium salt, 5% of modified polyurea polymer and 1% of phosphite ester into 38.5% of deionized water in sequence, stirring uniformly, heating to 75 ℃, continuing to stir for 60min, preserving heat and curing for 2.5h, cooling to normal temperature, and filtering the solution through membranes with the pore diameter of 0.4 mu m and 0.2 mu m in sequence to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 6.5.
(3) Carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the mending paste on a rolling belt of an automatic rotary spraying machine, wherein the aperture of a spray head of the automatic rotary spraying machine is 100 mu m, the rotating speed of a spray head support is 50r/min, the speed of the rolling belt is 30m/min, the cow leather passes through a spraying chamber and an oven chamber at a constant speed, and the temperature of the oven chamber is 80 ℃; repeatedly spraying 25% of the plant dye color paste obtained in the step (1), 30% of the composite resin, 8% of the coating auxiliary agent and the balance of deionized water for 2 times and spraying 1 time of the brightener to obtain the plant dye-coated cowhide mat;
wherein the composite resin is an anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
(4) To a cow leather matPlant dye printing ink spray-painting: the leather coated with the ground color is placed on a digital flat printer, wherein the spray head of the digital flat printer is 4pass, and the printing speed is 25m2H, the minimum ink drop is 10 pL; according to the color system of the spray painting pattern, placing plant dye printing ink, performing spray painting and printing, and then coating by using a brightener to obtain a final product; the brightener is an aliphatic brightening polyurethane brightener with a solid content of 25%.
Example five:
the embodiment comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 40% of catechin red natural dye, 12% of composite resin, 10% of polyoxyethylene sorbitan fatty acid ester, 8% of propylene glycol methyl ether, 0.8% of gas-phase silicon dioxide and 29.2% of deionized water.
Preparing the plant dye color paste: sequentially adding 12% of the composite resin, 8% of propylene glycol methyl ether and 29.2% of deionized water into a stirring container of a high-speed dispersion machine, uniformly stirring and dispersing at the speed of 4000r/min, then continuously adding 10% of polyoxyethylene sorbitan fatty acid ester, stirring and dispersing for 20min, finally adding 40% of the catechin red natural dye and 0.8% of fumed silica, and mixing to obtain the composite resin1800r/minDispersing40min，Forming uniformly dispersed plant dye color paste with the grinding fineness of the color paste6μm；
(2) Preparing plant dye printing ink according to the weight percentage: turmeric natural dye 8%, polyethylene glycol 10%, lauramidopropyl hydroxysulfobetaine 5%, tripropylene glycol monomethyl ether 12%, modified polydimethylsiloxane surfactant 4%, sodium bicarbonate 2.5%, glycerol 6%, quaternary ammonium salt 1%, modified polyurea polymer 5%, phosphite ester 1%, and deionized water 45.5%.
Preparing plant dye printing ink, adding 8% of turmeric natural dye, 10% of polyethylene glycol, 5% of lauramidopropyl hydroxysulfobetaine, 12% of tripropylene glycol monomethyl ether, 4% of modified polydimethylsiloxane surfactant, 2.5% of sodium bicarbonate, 6% of glycerol, 1% of quaternary ammonium salt, 5% of modified polyurea polymer and 1% of phosphite ester into 45.5% of deionized water in sequence, stirring uniformly, heating to 80 ℃, continuing stirring for 60min, keeping the temperature and curing for 2h, cooling to normal temperature, and filtering the solution through membranes with the pore diameter of 0.4 mu m and 0.2 mu m in sequence to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 6.
(3) Carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the mending paste on a rolling belt of an automatic rotary spraying machine, wherein the aperture of a spray head of the automatic rotary spraying machine is 60 mu m, the rotating speed of a spray head support is 30r/min, the speed of the rolling belt is 20m/min, the cow leather passes through a spraying chamber and an oven chamber at a constant speed, and the temperature of the oven chamber is 80 ℃; repeatedly spraying 30% of the plant dye color paste obtained in the step (1), 40% of the composite resin, 5% of the coating auxiliary agent and the balance of deionized water for 3 times and spraying 2 times of the brightener to obtain the plant dye-coated cowhide mat;
wherein the composite resin is an anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
(4) Carrying out plant dye printing ink spray painting on the cow leather mat: the leather coated with the ground color is placed on a digital flat printer, wherein the spray head of the digital flat printer is 6pass, and the printing speed is 20m2H, the minimum ink drop is 8 pL; according to the color system of the spray painting pattern, placing plant dye printing ink, performing spray painting and printing, and then coating by using a brightener to obtain a final product; the brightener is an aliphatic brightening polyurethane brightener with a solid content of 25%.
Example six:
the embodiment comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 40% of a horse blue natural dye, 5% of a madder red natural dye, 15% of acrylic resin, 10% of polyoxyethylene sorbitan fatty acid ester, 10% of propylene glycol methyl ether, 1% of fumed silica and 19% of deionized water.
Preparing the plant dye color paste: sequentially adding 15% of the acrylic resin, 10% of propylene glycol methyl ether and 19% of deionized water into a stirring container of a high-speed dispersion machine in sequence, uniformly stirring and dispersing at the speed of 5000r/min, and then continuously adding the polymer10% of oxyethylene sorbitan fatty acid ester, stirring and dispersing for 10min, and finally adding 40% of the kalant natural dye, 5% of madder red natural dye and 1% of gas phase silicon dioxide to obtain the final product2000r/minDispersing50minUniformly dispersed plant dye color paste is formed, and the grinding fineness of the color paste is 6 mu m;
(2) preparing plant dye printing ink according to the weight percentage: 10% of turmeric natural dye, 20% of lauramidopropyl hydroxysulfobetaine, 15% of phosphate polyether ester potassium salt, 4% of modified polydimethylsiloxane surfactant, 3% of sodium carbonate, 5% of ethylene glycol, 0.8% of quaternary ammonium salt, 8% of modified polyurea polymer, 0.8% of phosphite ester and 33.4% of deionized water.
Preparing plant dye printing ink, namely adding 10% of turmeric natural dye, 20% of lauramidopropyl hydroxysulfobetaine, 15% of phosphate polyether ester potassium salt, 4% of modified polydimethylsiloxane surfactant, 3% of sodium carbonate, 5% of ethylene glycol, 0.8% of quaternary ammonium salt, 8% of modified polyurea polymer and 0.8% of phosphite ester into 33.4% of deionized water in sequence, stirring uniformly, heating to 60 ℃, continuing to stir for 60min, preserving heat and curing for 3h, cooling to normal temperature, and filtering the solution through membranes with the pore diameter of 0.4 mu m and 0.2 mu m in sequence to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 7.
(3) Carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the mending paste on a rolling belt of an automatic rotary spraying machine, wherein the aperture of a spray head of the automatic rotary spraying machine is 80 mu m, the rotating speed of a spray head support is 60r/min, the speed of the rolling belt is 20m/min, the cow leather passes through a spraying chamber and an oven chamber at a constant speed, and the temperature of the oven chamber is 70 ℃; repeatedly spraying 30% of the plant dye color paste obtained in the step (1), 40% of the composite resin, 6% of the coating auxiliary agent and the balance of deionized water for 2 times according to the weight percentage, and spraying 2 times of the brightener to obtain the plant dye-coated cowhide mat;
wherein the composite resin is an anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
(4) Plant dye printing is carried out on the cow leather matInk jet drawing: the leather coated with the ground color is placed on a digital flat printer, wherein the spray head of the digital flat printer is 8pass, and the printing speed is 15m2H, the minimum ink drop is 9 pL; according to the color system of the spray painting pattern, placing plant dye printing ink, performing spray painting and printing, and then coating by using a brightener to obtain a final product; the brightener is an aliphatic brightening polyurethane brightener with solid content of 30%.
Hereinafter, data comparison is performed between each example of the present invention and the comparative example.
In the first, second, third, fourth, fifth and sixth embodiments, the cowhide mat treated by the method of the invention is compared with the cowhide mat sprayed by common synthetic dye and sprayed by UV ink, and the dyeing process is consistent. The detection results of various indexes on the product are shown in table 1:
Figure DEST_PATH_IMAGE001
as can be seen from Table 1, the friction fastness of the cow leather mat prepared by the method is not inferior to that of the conventional cow leather mat using the synthetic dye, and is even better; in the aspect of formaldehyde release amount, the cow leather mat prepared by the method can reach the use level of A-type infants, and is lower than 20 mg/kg; the odor grade is not lower than grade 2, namely the odor is not attractive, and the ideal effect is achieved.

Claims (7)

1. A preparation method of a cow leather mat applying vegetable dye is characterized in that: the method comprises the following steps:
(1) preparing plant dye color paste according to the weight percentage: 30-50% of vegetable dye, 10-15% of water-based resin, 5-10% of dispersing agent, 5-10% of propylene glycol methyl ether, 0.5-1% of anti-settling agent and the balance of deionized water;
preparing the plant dye color paste: sequentially adding the water-based resin, propylene glycol methyl ether and deionized water into a stirring container of a high-speed dispersion machine in sequence, uniformly stirring and dispersing at the speed of 3000-5000 r/min, then continuously adding the dispersing agent, stirring and dispersing for 10-30 min, finally adding the plant dye and the anti-settling agent, dispersing for 30-60 min at 1500-2000 r/min, and forming uniformly dispersed plant dye color paste, wherein the grinding fineness of the color paste is 5-10 mu m;
(2) preparing plant dye printing ink according to the weight percentage: 8-10% of vegetable dye, 10-25% of viscosity regulator, 5-15% of cosolvent, 0.5-4% of surface tension regulator, 1-3% of pH regulator, 4-8% of humectant, 0.5-1% of bactericide, 2-8% of color fixing agent, 0.5-1% of antioxidant and the balance of deionized water;
preparing plant dye printing ink, adding the plant dye, a viscosity regulator, a surface tension regulator, a humectant, a cosolvent, a bactericide, an antioxidant, a color fixing agent and a pH regulator into deionized water in sequence, stirring uniformly, heating to 50-80 ℃, continuously stirring for 60min, keeping the temperature, curing for 2-3 h, cooling to normal temperature, and filtering the solution through membranes with the pore diameters of 0.4 mu m and 0.2 mu m in sequence to obtain the plant dye printing ink; the pH value of the obtained plant dye printing ink is 6-7;
wherein the plant dye is one or more of gardenia yellow natural dye, turmeric natural dye, sophora flower bud yellow natural dye, madder red natural dye, catechin red natural dye, India tinctoria blue natural dye or isatis tinctoria blue natural dye;
(3) carrying out plant dye color paste spraying on the cow leather mat: placing the cow leather repaired and leveled by the repairing paste on a rolling belt of an automatic rotary spraying machine, passing through a spraying chamber and an oven chamber at a constant speed, repeatedly spraying 20-30% of the plant dye color paste obtained in the step (1), 30-40% of the composite resin, 3-8% of the coating auxiliary agent and the balance of deionized water for 2-3 times according to the weight percentage, and spraying 1-2 times of the brightener to obtain the plant dye-coated cow leather mat;
(4) carrying out plant dye printing ink spray painting on the cow leather mat: and (3) placing the leather coated with the ground color on a digital flat printer, placing plant dye printing ink according to the spray painting pattern color system, spray painting and printing, and coating by using a brightener to obtain a final product.
2. The method for preparing the cow leather mat using the vegetable dye according to claim 1, wherein the method comprises the following steps: in the step (1), the water-based resin is one of acrylic resin, polyurethane resin or composite resin; the dispersing agent is one or more of polyacrylic acid ammonium salt, polyoxyethylene sorbitan fatty acid ester or sodium polycarboxylate; the anti-settling agent is fumed silica.
3. The method for preparing the cow leather mat using the vegetable dye according to claim 1, wherein the method comprises the following steps: in the step (2), the viscosity regulator is one or more of polyethylene glycol, alkylphenol ethoxylates or lauramidopropyl hydroxysulfobetaine; the cosolvent is one or more of polypropylene glycol, potassium phosphate polyether ester or tripropylene glycol monomethyl ether; the surface tension regulator is a modified polydimethylsiloxane surfactant; the humectant is one or more of ethylene glycol or glycerol; the bactericide is one or more of polyhexamethylene guanidine or quaternary ammonium salt; the pH regulator is one of sodium bicarbonate, sodium carbonate or citric acid; the color fixing agent is one or more of butyl acetate cellulose or modified polyurea polymer; the antioxidant is one or more of polyoxyethylene or phosphite ester.
4. The method for preparing the cow leather mat using the vegetable dye according to claim 1, wherein the method comprises the following steps: in the step (3), the aperture of the spray head of the automatic rotary spraying machine is 50-100 mu m, the rotating speed of the spray head bracket is 30-60 r/min, the speed of the rolling belt is 20-30 m/min, and the temperature of the oven chamber is 70-80 ℃.
5. The method for preparing the cow leather mat using the vegetable dye according to claim 1, wherein the method comprises the following steps: the composite resin in the step (3) is anionic RC3065 soft composite resin; the finishing auxiliary agent is WAX5050 composite WAX emulsion; the brightener is an aliphatic brightening polyurethane brightener.
6. The cow leather mat using the vegetable dye as set forth in claim 1The preparation method is characterized by comprising the following steps: the spray head of the digital flat-panel printer in the step (4) is 4pass-12pass, and the printing speed is 10m2/h-25m2And h, the minimum ink drop is 7pL-10 pL.
7. The method for preparing the cow leather mat using the vegetable dye according to claim 1, wherein the method comprises the following steps: in the step (4), the brightener is an aliphatic glossy polyurethane brightener with a solid content of 25-30%.
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