CN101736595A - Method for preparing waterproof moisture-permeable coated fabric - Google Patents
Method for preparing waterproof moisture-permeable coated fabric Download PDFInfo
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Abstract
The invention discloses a method for preparing a waterproof moisture-permeable coated fabric. The moisture permeability of a polyurethane coated fabric is improved by adding modified cellulose powder which accounts for 5 to 50 percent of the weight of polyurethane and is modified by a silane coupling agent into a polyurethane coating agent, and the waterproof property of the polyurethane is improved by adding inorganic powder which accounts for 0.5 to 5 percent of the weight of the polyurethane and is modified by the silane coupling agent, wherein the silane coupling agent accounts for 0.5 to 1 percent of the weight of the modified cellulose powder; and the silane coupling agent accounts for 0.5 to 1 percent of the weight of the inorganic powder. The modified polyurethane which accounts for 15 to 50 percent of the weight of a base fabric is coated on the base fabric of a knitted fabric, a woven fabric or a non-woven fabric to prepare the waterproof moisture-permeable coated fabric with good performance. The method is simple and easy, and can perform mass production; and the prepared fabric has excellent waterproof and moisture-permeable abilities, solves the contradiction between the waterproof capacity and the moisture-permeable capacity of the fabrics, and can be applied to coated fabrics for functional clothing, shoes, tents and buildings in a large quantity.
Description
Technical field
The present invention relates to the textile material field, relate in particular to a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously.
Background technology
Waterproof moisture permeating fabric has waterproof, windproof and wet thoroughly function, is widely used in function clothes, tent, footwear boots and industry and uses the field.The processing method of waterproof moisture permeating fabric mainly comprises high density fabric (CN1721596 is disclosed as patent), fabric and hydrophilic film lamination compound (CN1940162 is disclosed as patent), fabric and microporous membrane lamination compound (CN1519106 is disclosed as patent), fabric and hydrophilic coating agent coating (CN101424045 is disclosed as patent) at present.Wherein the fabric painted fabric with water-proof and drench qualities simutaneously that processing obtains through hydrophilic coating agent coating has higher poisture-penetrability, and easy to process, cost is lower, is a kind of common method of processing waterproof moisture permeating fabric.The hydrophilic coating agent mainly comprises hydrophilic polypropylene acid esters, polyacrylamide and polyurethane equal solvent type or water-dispersion type macromolecular compound.Wherein hydrophilic polyurethane coating coated fabric is the most common as painted fabric with water-proof and drench qualities simutaneously, can pass through wet-process coating, the direct coating of dry method and process technology such as transfer coated, realizes the Waterproof Breathable function of fabric.The coated fabric that obtains through the hydrophilic polyurethane coating processing that contains polyether segment has wet thoroughly preferably ability, kind, molecular weight and the content etc. of saturating wet ability and polyethers have much relations (as described in the 516th page of the 36th the 8th phase of volume of " Liaoning chemical industry " magazine), the wet thoroughly ability of polyurethane that contains polyoxyethylene ether and polyethenoxy ether hydrophilic component is better, and molecular weight is low more, poisture-penetrability is good more, but waterproof ability is low more.The ubiquitous problem of EU is exactly the contradiction of waterproof and saturating wet ability at present, the promptly wet thoroughly high coating agent of ability, and waterproof ability is lower; The coating agent that waterproof ability is high, wet thoroughly ability is lower.
For the waterproof of solution moisture permeability polyurethane and the contradiction between saturating the wetting, be a desirable method by adding the high-hygroscopicity modified powder.Provide as the 12nd page of patent CN101104752 and CN101481579 and " printing and dyeing assistant " the 21st the 6th phase of volume, by adding compositions such as stronger lignocellulose of wettability power or the insoluble modified carboxy methyl cellulose of water, improved the saturating wet ability of moisture permeability polyurethane coating fabric greatly, but when improving saturating wet ability, the waterproof ability of coated fabric but descends to some extent.
The present invention ties up the water vapour permeability that plain powder improves the polyurethane coating fabric by adding through silane coupler modified modification in polyurethane coating agent, by adding the water resistance that improves polyurethane through silane coupler modified inorganic powder, solve the waterproof of moisture permeability polyurethane coating fabric and the contradiction between saturating the wetting.
Summary of the invention
The purpose of this invention is to provide a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously,, improve the water proofing property of low moisture-penetrating coating fabric simultaneously, solve the contradiction between the waterproof of painted fabric with water-proof and drench qualities simutaneously and the wet thoroughly ability to improve the poisture-penetrability of coated fabric.
The technical solution adopted in the present invention comprises two steps:
(1) modification of polyurethane coating agent:
A. the silane coupler with modified cellulose powder weight 0.5-1% is dissolved in the ethyl acetate, add the modified cellulose powder, adopt shear mixer to stir 10-40min, obtaining mass percent concentration is the modified cellulose powder ethyl acetate solution of 50-65%;
B. the silane coupler with inorganic powder weight 0.5-1% is dissolved in the ethyl acetate, adds inorganic powder, adopts shear mixer to stir 10-40min, and obtaining mass percent concentration is the ethyl acetate solution of the modified inorganic powder of 50-65%;
C. the ethyl acetate solution of above-mentioned modified cellulose powder and the ethyl acetate solution of modified inorganic powder are mixed, stirring condition adds the crosslinking agent of 0-10% polyurethane solid content and the crosslinking accelerator of 0-2% polyurethane solid content down;
D. step c obtain solution being added solid content under stirring condition is 25-65% base polyurethane prepolymer for use as solution, and dilute with diluent, obtain the polyurethane coating working solution, working solution viscosity is 8-20Pa.s, the modified cellulose powder that contains 5-50% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the inorganic particle of 0.5-5% base polyurethane prepolymer for use as weight;
(2) preparation of coated fabric
A. the coated fabric base cloth is carried out impermeable arrangement, arrangement back base cloth spray rating 4-5;
B. under 90-110 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 300-400KN;
C. the coating working solution of above-mentioned preparation is applied on the base cloth after process (b) step process, coating weight by dry post-modification weight polyurethane to the base cloth dry weight than controlling for 15-50%;
D. base cloth bakes through 120-170 ℃ of high temperature after the coating, and time 2-10min obtains painted fabric with water-proof and drench qualities simutaneously.
Described coated fabric base cloth is knitted fabric, woven fabric or non-weaving cloth.
Described base polyurethane prepolymer for use as is the solvent borne polyurethane that contains the polyethers hydrophilic segment, and described diluent is a kind of in toluene, butanone, dimethyl formamide, the ethyl acetate or any two kinds.
Described modified cellulose powder is that the microcrystalline cellulose or the substitution value of particle diameter 5-80 micron is 0.60-0.85 cross-linked carboxymethyl cellulose powder.
Described inorganic particle is the silicon-dioxide powdery of particle diameter 20-500 nanometer, or particle diameter is a 800-5000 purpose talcum powder.
Described silane coupler is to have amino gamma-aminopropyl-triethoxy-silane.
Described silane coupler is the γ-glycidyl ether oxygen propyl trimethoxy silicane that has the silane coupler of epoxide group.
The material of described coated fabric base cloth is cotton, viscose glue, terylene, polyamide fibre, acrylic staple fibre or long filament.
Described base polyurethane prepolymer for use as is the solvent borne polyurethane that contains the polyethers hydrophilic segment, polyether segment content height then after the coating poisture-penetrability good, water pressure resistance is lower; Polyester segment content height then vapor transfer rate reduces, and water pressure resistance and strength of coating increase.The BTH-25SL of commercially available kind such as Yantai Huada Chemicals Industry Co., Ltd., BTH-30SH, the Impraperm 43187 of BayerMaterial Science, the Solucote 920 moisture permeability polyurethane coating agents of DSM NeoSol Inc.The moisture permeability types of polyurethane that contains polyether segment is loaded down with trivial details, the crosslinking agent that is adopted mostly is modified polyisocyanate (as vulcabond and trimethyl propane reactant) or melamine (as trimethylol melamine, hexa methoxy methylene tri poly cyanamid etc.) solution, and promoter mostly is acid organotin (as dibutyl tin laurate, maleic acid dibutyl tin, dibutyltin diacetate etc.) solution.The general crosslinking agent and the crosslinking accelerator of correspondence with it of adopting of commercial polyurethane performed polymer, polyether/polyester type aromatic urethane performed polymer (Baye rMaterial Science Impraperm 43187) as 50% solid content adopts Imprafix SV melamine as crosslinking agent, adopts the acid organotin of Imprafix SK as crosslinking accelerator.
The present invention compares with background technology, has the following advantages:
1, the coating agent preparation method is simple, does not need to increase extras, is produced on a large scale.
2, the coated fabric of the present invention's preparation has excellent waterproof and wet thoroughly ability, especially when improving saturating wet ability, does not reduce the water proofing property of coated fabric, has solved the contradiction between such fabric waterproof and the wet thoroughly ability.
3, polyurethane coating fabric provided by the present invention can be widely used in function clothes, footwear boots, tent, coated fabric for building, and application surface is very extensive.
The specific embodiment
Fabric coating is various with hydrophily moisture permeability types of polyurethane, is difficult to exhaustively, and coating agent method of modifying provided by the present invention and coated fabric preparation method contain polyether segment hydrophilic polyurethane coating agent to all solvent-borne types and all be suitable for.Simultaneously, the base cloth kind that coated fabric adopted is a lot, so following examples are used to explain implementation of the present invention, and the present invention is not limited to following embodiment.
Embodiment 1:
(1) modification of polyurethane coating agent
A. the amino silicane coupling agent (KH550) with microcrystalline cellulose powder weight 0.5% is dissolved in the ethyl acetate, particle diameter 5 μ m microcrystalline cellulose powder, adopt shear mixer to stir 10min, obtain mass percent concentration and be 65% modified microcrystalline cellulose powder ethyl acetate solution.
B. the amino silicane coupling agent (KH550) with silica weight 0.5% is dissolved in the ethyl acetate, the silica that adds particle diameter 20nm, adopt shear mixer to stir 10min, obtain mass percent concentration and be the ethyl acetate solution of 65% improved silica.
C. the ethyl acetate solution of above-mentioned modified microcrystalline cellulose powder and the ethyl acetate solution of improved silica are mixed;
D. step c obtain solution being added solid content under stirring condition is 30% base polyurethane prepolymer for use as solution (monocomponent polyurethane), and use butanone: 1: 1 mixed solvent of dimethyl formamide volume ratio dilutes, obtain the polyurethane coating working solution, working solution viscosity is 8Pa.s, the microcrystalline cellulose powder that contains 5% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the silicon-dioxide powdery of 0.5% base polyurethane prepolymer for use as weight.
(2) preparation of coated fabric
A. with Gram Mass 250g/m
2300D*300D polyester-cotton blend Oxford plain cloth (coated fabric base cloth) carry out the impermeable arrangement of fluorine carbon finishing agent (AG480), arrangement back base cloth spray rating 4;
B. under 90 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 300KN;
C. the coating working solution of above-mentioned preparation is applied on the base cloth after process (b) step process by the direct coating way of scraper, coating weight is 15% to control by dry post-modification weight polyurethane to base cloth dry weight ratio;
D. base cloth bakes through 170 ℃ of high temperature after the coating, and time 2min obtains painted fabric with water-proof and drench qualities simutaneously.
The vapor transfer rate 4500g/m of the waterproof moisture permeating fabric that obtains after the coating
2.24h, hydrostatic pressing 40kPa, and the coated fabric vapor transfer rate 4000g/m of non-modified
2.24h, hydrostatic pressing 35kPa.
Embodiment 2:
(1) modification of polyurethane coating agent
A. the amino silicane coupling agent (KH550) with microcrystalline cellulose powder weight 0.8% is dissolved in the ethyl acetate, particle diameter 50 μ m microcrystalline cellulose powder, adopt shear mixer to stir 20min, obtain mass percent concentration and be 60% modified microcrystalline cellulose powder ethyl acetate solution.
B. the amino silicane coupling agent (KH550) with silica weight 0.8% is dissolved in the ethyl acetate, the silica that adds particle diameter 200nm, adopt shear mixer to stir 20min, obtain mass percent concentration and be the ethyl acetate solution of 60% improved silica.
C. the ethyl acetate solution of above-mentioned modified microcrystalline cellulose powder and the ethyl acetate solution of improved silica are mixed;
D. step c obtain solution being added solid content under stirring condition is 30% base polyurethane prepolymer for use as solution (monocomponent polyurethane), and use butanone: 1: 1 mixed solvent of dimethyl formamide volume ratio dilutes, obtain the polyurethane coating working solution, working solution viscosity is 15Pa.s, the microcrystalline cellulose powder that contains 20% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the silicon-dioxide powdery of 3% base polyurethane prepolymer for use as weight.
(2) preparation of coated fabric
A. with Gram Mass 250g/m
2300D*300D polyester-cotton blend Oxford plain cloth (coated fabric base cloth) carry out the impermeable arrangement of fluorine carbon finishing agent (AG480), arrangement back base cloth spray rating 4;
B. under 90 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 300KN;
C. the coating working solution of above-mentioned preparation is applied on the base cloth after process (b) step process by the direct coating way of scraper, coating weight is 30% to control by dry post-modification weight polyurethane to base cloth dry weight ratio;
D. base cloth bakes through 150 ℃ of high temperature after the coating, and time 4min obtains painted fabric with water-proof and drench qualities simutaneously.
The vapor transfer rate 6000g/m of the waterproof moisture permeating fabric that obtains after the coating
2.24h, hydrostatic pressing 70kPa, and the coated fabric vapor transfer rate 4000g/m of non-modified
2.24h, hydrostatic pressing 60kPa.
Embodiment 3:
(1) modification of polyurethane coating agent
A. the amino silicane coupling agent (KH550) with microcrystalline cellulose powder weight 1% is dissolved in the ethyl acetate, add particle diameter 80 μ m microcrystalline cellulose powder, adopt shear mixer to stir 40min, obtain mass percent concentration and be 50% modified microcrystalline cellulose powder ethyl acetate solution.
B. the amino silicane coupling agent (KH550) with silica weight 1% is dissolved in the ethyl acetate, the silica that adds particle diameter 500nm, adopt shear mixer to stir 40min, obtain mass percent concentration and be the ethyl acetate solution of 50% improved silica.
C. the ethyl acetate solution of above-mentioned modified microcrystalline cellulose powder and the ethyl acetate solution of improved silica are mixed; Stirring condition adds the trimethylol melamine crosslinking agent of 5% polyurethane solid content and the dibutyl tin laurate crosslinking accelerator of 1% polyurethane solid content down;
D. step c obtain solution being added solid content under stirring condition is 50% base polyurethane prepolymer for use as solution (dual-component polyurethane), and use toluene: 1: 1 mixed solvent of ethyl acetate volume ratio dilutes, obtain the polyurethane coating working solution, working solution viscosity is 15Pa.s, the microcrystalline cellulose powder that contains 50% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the silicon-dioxide powdery of 5% base polyurethane prepolymer for use as weight.
(2) preparation of coated fabric
A. with Gram Mass 350g/m
2420D*420D polyester filament Oxford plain cloth (coated fabric base cloth) carry out the impermeable arrangement of fluorine carbon finishing agent (AG480), arrangement back base cloth spray rating 5;
B. under 90 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 400KN;
C. the coating working solution of above-mentioned preparation is applied on the base cloth after process (b) step process by the direct coating way of scraper, coating weight is 50% to control by dry post-modification weight polyurethane to base cloth dry weight ratio;
D. base cloth bakes through 160 ℃ of high temperature after the coating, and time 5min obtains painted fabric with water-proof and drench qualities simutaneously.
The vapor transfer rate 7500g/m of the waterproof moisture permeating fabric that obtains after the coating
2.24h, hydrostatic pressing 85kPa, and the coated fabric vapor transfer rate 3800g/m of non-modified
2.24h, hydrostatic pressing 75kPa.
Embodiment 4:
(1) modification of polyurethane coating agent
A. the epoxy silane coupling (KH560) with cross-linked carboxymethyl cellulose powder weight 0.8% is dissolved in the ethyl acetate, the cross-linked carboxymethyl cellulose powder that adds the degree of cross linking 0.65, adopt shear mixer to stir 20min, obtain mass percent concentration and be 55% modified crosslinking carboxymethyl cellulose powder ethyl acetate solution.
B. the epoxy silane coupling (KH560) with talcum powder weight 0.8% is dissolved in the ethyl acetate, add particle diameter 800 purpose talcum powder, adopt shear mixer to stir 20min, obtain mass percent concentration and be the ethyl acetate solution of 50% modified talc powder.
C. the ethyl acetate solution of above-mentioned modified crosslinking carboxymethyl cellulose powder and the ethyl acetate solution of modified talc powder silicon are mixed; Stirring condition adds the vulcabond of 10% polyurethane solid content and the dibutyltin diacetate crosslinking accelerator of trimethyl propane reactant crosslinking agent and 2% polyurethane solid content down;
D. step c obtain solution being added solid content under stirring condition is 65% base polyurethane prepolymer for use as solution (dual-component polyurethane), and use butanone: dimethyl formamide is long-pending than mixed solvent dilution in 1: 1, obtain the polyurethane coating working solution, working solution viscosity is 20Pa.s, the cross-linked carboxymethyl cellulose that contains 30% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the talcum powder powder of 3% base polyurethane prepolymer for use as weight.
(2) preparation of coated fabric
A. with Gram Mass 120g/m
270D chinlon 6 filament tricot (coated fabric base cloth) carry out the impermeable arrangement of fluorine carbon finishing agent (AG480), arrangement back base cloth spray rating 4;
B. under 110 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 400KN;
C. the coating working solution of above-mentioned preparation is applied on the base cloth after process (b) step process by the direct coating way of scraper, coating weight is 50% to control by dry post-modification weight polyurethane to base cloth dry weight ratio;
D. base cloth bakes through 130 ℃ of high temperature after the coating, and time 6min obtains painted fabric with water-proof and drench qualities simutaneously.
The vapor transfer rate 5000g/m of the waterproof moisture permeating fabric that obtains after the coating
2.24h, hydrostatic pressing 85kPa, and the coated fabric vapor transfer rate 3500g/m of non-modified
2.24h, hydrostatic pressing 80kPa.
Embodiment 5
(1) modification of polyurethane coating agent
A. the epoxy silane coupling (KH560) with cross-linked carboxymethyl cellulose powder weight 0.9% is dissolved in the ethyl acetate, the cross-linked carboxymethyl cellulose powder that adds the degree of cross linking 0.7, adopt shear mixer to stir 30min, obtain mass percent concentration and be 55% modified crosslinking carboxymethyl cellulose powder ethyl acetate solution.
B. the epoxy silane coupling (KH560) with talcum powder weight 0.8% is dissolved in the ethyl acetate, add particle diameter 2000 purpose talcum powder, adopt shear mixer to stir 30min, obtain mass percent concentration and be the ethyl acetate solution of 55% modified talc powder.
C. the ethyl acetate solution of above-mentioned modified crosslinking carboxymethyl cellulose powder and the ethyl acetate solution of modified talc powder silicon are mixed; Stirring condition adds the vulcabond of 10% polyurethane solid content and the dibutyltin diacetate crosslinking accelerator of trimethyl propane reactant crosslinking agent and 2% polyurethane solid content down;
D. step c obtain solution being added solid content under stirring condition is 65% base polyurethane prepolymer for use as solution (dual-component polyurethane), and use butanone: dimethyl formamide is long-pending than mixed solvent dilution in 1: 1, obtain the polyurethane coating working solution, working solution viscosity is 20Pa.s, the cross-linked carboxymethyl cellulose that contains 30% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the talcum powder powder of 3% base polyurethane prepolymer for use as weight.
(2) preparation of coated fabric
A. with Gram Mass 120g/m
270D chinlon 6 filament tricot (coated fabric base cloth) carry out the impermeable arrangement of fluorine carbon finishing agent (AG480), arrangement back base cloth spray rating 5;
B. under 110 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 400KN;
C. the coating working solution of above-mentioned preparation is applied on the base cloth after process (b) step process by the direct coating way of scraper, coating weight is 15% to control by dry post-modification weight polyurethane to base cloth dry weight ratio;
D. base cloth bakes through 120 ℃ of high temperature after the coating, and time 10min obtains painted fabric with water-proof and drench qualities simutaneously.The vapor transfer rate 5500g/m of the waterproof moisture permeating fabric that obtains after the coating
2.24h, hydrostatic pressing 70kPa, and the coated fabric vapor transfer rate 4500g/m of non-modified
2.24h, hydrostatic pressing 60kPa.
Embodiment 6
(1) modification of polyurethane coating agent
A. the epoxy silane coupling (KH560) with cross-linked carboxymethyl cellulose powder weight 0.8% is dissolved in the ethyl acetate, the cross-linked carboxymethyl cellulose powder that adds the degree of cross linking 0.8, adopt shear mixer to stir 40min, obtain mass percent concentration and be 55% modified crosslinking carboxymethyl cellulose powder ethyl acetate solution.
B. the epoxy silane coupling (KH560) with talcum powder weight 0.8% is dissolved in the ethyl acetate, add particle diameter 5000 purpose talcum powder, adopt shear mixer to stir 40min, obtain mass percent concentration and be the ethyl acetate solution of 50% modified talc powder.
C. the ethyl acetate solution of above-mentioned modified crosslinking carboxymethyl cellulose powder and the ethyl acetate solution of modified talc powder silicon are mixed; Stirring condition adds the vulcabond of 4% polyurethane solid content and the dibutyltin diacetate crosslinking accelerator of trimethyl propane reactant crosslinking agent and 0.6% polyurethane solid content down;
D. step c obtain solution being added solid content under stirring condition is 25% base polyurethane prepolymer for use as solution (dual-component polyurethane), and use butanone: dimethyl formamide is long-pending than mixed solvent dilution in 1: 1, obtain the polyurethane coating working solution, working solution viscosity is 15Pa.s, the cross-linked carboxymethyl cellulose that contains 50% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the talcum powder powder of 5% base polyurethane prepolymer for use as weight.
(2) preparation of coated fabric
A. with Gram Mass 300g/m
2Water thorn viscose (fiber average fineness 1.5D, average length 38mm) non-weaving cloth (coated fabric base cloth) carry out the impermeable arrangement of fluorine carbon finishing agent (AG480), arrangement back base cloth spray rating 4;
B. under 100 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 400KN;
C. the coating working solution with above-mentioned preparation is applied to through on the base cloth after (b) step process by the direct coating way of scraper, and coating weight is 25% by dry post-modification weight polyurethane to base cloth dry weight ratio.
D. base cloth bakes through 160 ℃ of high temperature after the coating, and time 4min obtains painted fabric with water-proof and drench qualities simutaneously.
The vapor transfer rate 8000g/m of coated fabric
2.24h, hydrostatic pressing 75kPa, and the coated fabric vapor transfer rate 5000g/m of non-modified
2.24h, hydrostatic pressing 55kPa.
Claims (7)
1. method for preparing painted fabric with water-proof and drench qualities simutaneously is characterized in that comprising two steps:
(1) modification of polyurethane coating agent:
A. the silane coupler with modified cellulose powder weight 0.5-1% is dissolved in the ethyl acetate, add the modified cellulose powder, adopt shear mixer to stir 10-40min, obtaining mass percent concentration is the modified cellulose powder ethyl acetate solution of 50-65%;
B. the silane coupler with inorganic powder weight 0.5-1% is dissolved in the ethyl acetate, adds inorganic powder, adopts shear mixer to stir 10-40min, and obtaining mass percent concentration is the ethyl acetate solution of the modified inorganic powder of 50-65%;
C. the ethyl acetate solution of above-mentioned modified cellulose powder and the ethyl acetate solution of modified inorganic powder are mixed, stirring condition adds the crosslinking agent of 0-10% polyurethane solid content and the crosslinking accelerator of 0-2% polyurethane solid content down;
D. step c obtain solution being added solid content under stirring condition is 25-65% base polyurethane prepolymer for use as solution, and dilute with diluent, obtain the polyurethane coating working solution, working solution viscosity is 8-20Pa.s, the modified cellulose powder that contains 5-50% base polyurethane prepolymer for use as weight in the polyurethane coating working solution, the inorganic particle of 0.5-5% base polyurethane prepolymer for use as weight;
(2) preparation of coated fabric:
A. the coated fabric base cloth is carried out impermeable arrangement, arrangement back base cloth spray rating 4-5;
B. under 90-110 ℃ the fabric base cloth after process (a) step process is being carried out calendering, pressure 300-400KN;
C. the coating working solution of above-mentioned preparation is applied on the base cloth after process (b) step process, coating weight by dry post-modification weight polyurethane to the base cloth dry weight than controlling for 15-50%;
D. base cloth bakes through 120-170 ℃ of high temperature after the coating, and time 2-10min obtains painted fabric with water-proof and drench qualities simutaneously.
2. a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously according to claim 1 is characterized in that: described coated fabric base cloth is knitted fabric, woven fabric or non-weaving cloth.
3. a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously according to claim 1, it is characterized in that: described base polyurethane prepolymer for use as is the solvent borne polyurethane that contains the polyethers hydrophilic segment, and described diluent is a kind of in toluene, butanone, dimethyl formamide, the ethyl acetate or any two kinds.
4. a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously according to claim 1 is characterized in that: described modified cellulose powder is that the microcrystalline cellulose or the substitution value of particle diameter 5-80 micron is 0.60-0.85 cross-linked carboxymethyl cellulose powder.
5. a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously according to claim 1 is characterized in that: described inorganic particle is the silicon-dioxide powdery of particle diameter 20-500 nanometer, or particle diameter is a 800-5000 purpose talcum powder.
6. a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously according to claim 1 is characterized in that: described silane coupler is to have amino gamma-aminopropyl-triethoxy-silane.
7. a kind of method for preparing painted fabric with water-proof and drench qualities simutaneously according to claim 1 is characterized in that: described silane coupler is the γ-glycidyl ether oxygen propyl trimethoxy silicane that has the silane coupler of epoxide group.
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2009
- 2009-12-24 CN CN2009101569610A patent/CN101736595B/en not_active Expired - Fee Related
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