CN115354506B - Preparation method of waterproof and moisture permeable composite cloth - Google Patents
Preparation method of waterproof and moisture permeable composite cloth Download PDFInfo
- Publication number
- CN115354506B CN115354506B CN202211052096.7A CN202211052096A CN115354506B CN 115354506 B CN115354506 B CN 115354506B CN 202211052096 A CN202211052096 A CN 202211052096A CN 115354506 B CN115354506 B CN 115354506B
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- polyurethane
- waterproof
- film
- moisture
- glue solution
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- 239000004744 fabric Substances 0.000 title claims abstract description 206
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920002635 polyurethane Polymers 0.000 claims abstract description 135
- 239000004814 polyurethane Substances 0.000 claims abstract description 135
- 239000003292 glue Substances 0.000 claims abstract description 123
- 238000000576 coating method Methods 0.000 claims abstract description 46
- 239000011248 coating agent Substances 0.000 claims abstract description 44
- 238000001035 drying Methods 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000012528 membrane Substances 0.000 claims abstract description 19
- 238000007731 hot pressing Methods 0.000 claims abstract description 14
- 229920003226 polyurethane urea Polymers 0.000 claims abstract description 8
- 239000002313 adhesive film Substances 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 13
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 10
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 8
- -1 polypropylene Polymers 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229920006264 polyurethane film Polymers 0.000 claims description 6
- 244000025254 Cannabis sativa Species 0.000 claims description 4
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 4
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 4
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 4
- 229920000297 Rayon Polymers 0.000 claims description 4
- 229920004933 Terylene® Polymers 0.000 claims description 4
- 239000004760 aramid Substances 0.000 claims description 4
- 229920003235 aromatic polyamide Polymers 0.000 claims description 4
- 235000009120 camo Nutrition 0.000 claims description 4
- 235000005607 chanvre indien Nutrition 0.000 claims description 4
- 239000011487 hemp Substances 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 229920001684 low density polyethylene Polymers 0.000 claims description 3
- 239000004702 low-density polyethylene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920006289 polycarbonate film Polymers 0.000 claims description 3
- 229920006267 polyester film Polymers 0.000 claims description 3
- 230000035515 penetration Effects 0.000 abstract description 9
- 239000002798 polar solvent Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 230000001070 adhesive effect Effects 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 15
- 239000012790 adhesive layer Substances 0.000 description 14
- 238000005507 spraying Methods 0.000 description 10
- 229920000728 polyester Polymers 0.000 description 8
- 230000000149 penetrating effect Effects 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 239000004721 Polyphenylene oxide Substances 0.000 description 6
- 229920000570 polyether Polymers 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000013329 compounding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 150000001412 amines Chemical group 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
- D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a preparation method of waterproof moisture-permeable composite cloth, which comprises the steps of coating polyurethane glue solution prepared from polyurethane and/or polyurethane urea and a polar solvent on the surface cloth, and then drying to obtain the surface cloth layer with a polyurethane glue layer; coating the polyurethane glue solution on a release film and drying to form a polyurethane glue film, coating a layer of the polyurethane glue solution on the glue film, attaching a base fabric to the glue solution, and drying to obtain a base fabric layer with a polyurethane glue layer; and finally, attaching the surface cloth layer, the waterproof moisture-permeable membrane and the bottom cloth layer to perform hot pressing to obtain the waterproof moisture-permeable composite cloth. The method can effectively avoid hardening and flaws of the cloth caused by glue penetration while ensuring the peeling strength of the waterproof moisture-permeable composite cloth.
Description
Technical Field
The invention relates to a preparation method of a composite fabric, in particular to a preparation method of waterproof and moisture permeable composite fabric.
Background
For outdoor sports equipment, the fabric is generally required to be capable of effectively transmitting water vapor while preventing liquid water from penetrating, namely, the fabric can play a role of waterproof and moisture permeable. Most waterproof and moisture permeable fabrics in the current market are provided with a layer of waterproof and moisture permeable film, wherein a plurality of micropores or hydrophilic groups with certain diameters exist in the waterproof and moisture permeable film, and the micropores or hydrophilic groups allow water vapor to pass through and can isolate liquid water forming water drops.
At present, when a waterproof and moisture-permeable membrane is compounded in a fabric, the fabric is mainly manufactured by two methods, namely a direct coating method and a film post-compounding method. The direct coating is generally to directly coat a gluing solution with waterproof and moisture-permeable functions on the surface fabric, and then dry the surface fabric to obtain waterproof and moisture-permeable fabric; the film post-compounding method is to prepare waterproof moisture-permeable film from the glue-coated solution with waterproof moisture-permeable function, and then to bond the surface cloth, the waterproof moisture-permeable film and the base cloth together by using an adhesive.
However, in the two preparation methods, in the direct coating process, the glue coating solution is easy to permeate into the other surface of the surface cloth due to the fluidity of the glue coating solution when the solution is used in a large amount, so that the finished product cloth is flawed and has hard hand feeling, especially for the base cloth, the base cloth is usually made of thinner fabric in order to enable the composite cloth to have better hand feeling, and the glue penetration problem is more easy to occur when the base cloth is glued, so that the appearance and the hand feeling of the composite cloth are affected; when the solution is used in a small amount, the water resistance of the product is difficult to meet the requirement due to the existence of pores in the fabric. The adhesive in the market at present is usually aqueous polyurethane glue solution or polyurethane hot melt glue powder, the glue penetration problem can also occur in the gluing process, and the peeling strength and the moisture permeability of the composite fabric prepared from the two adhesives are fast reduced in the storage or use process, and the reduction is accelerated after washing; and in the production and manufacturing processes of the two types of adhesives, the components of the organic solvents which are commonly adopted are complex, and the organic solvents are difficult to completely remove and recycle.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a preparation method of waterproof and moisture permeable composite cloth, which can prevent an adhesive from penetrating through the fabric under the condition of ensuring enough peeling strength, and has the following specific scheme:
the preparation method of the waterproof and moisture permeable composite cloth is characterized by comprising the following steps of:
1) One or more of DMAc, dimethyl sulfoxide, N-methyl pyrrolidone and dimethylformamide are used as solvents to dissolve polyurethane and/or polyurethane urea to prepare polyurethane glue solution;
2) Coating the polyurethane glue solution in the step 1) on a piece of surface cloth, and drying the surface cloth to obtain a surface cloth layer with a polyurethane glue film;
3) Coating the polyurethane glue solution obtained in the step 1) on a release film, and drying to obtain a polyurethane film;
4) Coating the polyurethane glue solution in the step 1) on the polyurethane film in the step 3), and then attaching the base fabric to the glue solution;
5) Drying the base fabric, and stripping the release film to obtain the base fabric layer with the polyurethane adhesive film;
6) And (3) arranging the surface fabric layer, the waterproof and moisture-permeable membrane and the base fabric layer in sequence, wherein the polyurethane adhesive film of the surface fabric layer is attached to one surface of the waterproof and moisture-permeable membrane, and the polyurethane adhesive film of the base fabric layer is attached to the other surface of the waterproof and moisture-permeable membrane, and the surface fabric layer, the waterproof and moisture-permeable membrane and the base fabric layer are compounded together through hot pressing to form the waterproof and moisture-permeable composite fabric.
Optionally, the specific steps of the glue solution coating in the step 2) are as follows:
2.1 Coating the polyurethane glue solution in the step 1) on a release film, attaching the surface fabric to the glue solution, and spraying water on the surface fabric;
2.2 Drying the surface fabric, and stripping off the release film to obtain the surface fabric layer with the polyurethane adhesive film;
optionally, the polyurethane glue solution in the step 1) has a viscosity of 5-30 poise and a solid content of 5-20%.
Optionally, the polyurethane and/or polyurethaneurea described in step 1) is insoluble in water.
Optionally, the coating thickness of the polyurethane glue solution in step 2.1), step 3) and step 4) is 50-250 μm.
Optionally, the water spraying time in step 2.1) is 1-30s.
Optionally, the release film is one or more of a polypropylene film, a low-density polyethylene film, a polycarbonate film and a polyester film.
Optionally, the drying temperature in the steps 2), 3) and 5) is 80-200 ℃ and the drying time is 4-20min.
Optionally, in step 6), the hot pressing temperature is 60-200 ℃, and the hot pressing pressure is 200-800kg/m 2 The hot pressing time is 1-600s.
Optionally, the material of the surface fabric is one or more of terylene, aramid, polypropylene, viscose, cotton and hemp.
Optionally, the material of the base fabric is one or more of terylene, aramid, polypropylene, viscose, cotton and hemp.
Optionally, after the step 2.2) of peeling to obtain the fabric layer, the step 2.2.1) may be added: and coating the polyurethane glue solution in the step 1) on a release film, then attaching one surface of the surface cloth layer with the polyurethane glue film to the glue solution, drying the surface cloth, stripping the release film, and obtaining the surface cloth layer with the thickened polyurethane glue film.
Compared with the polyurethane surface fabric layer obtained in the step 2.2), the polyurethane adhesive film attached to the surface of the surface fabric layer obtained in the step 2.2.1) is thicker, and the peeling strength of the composite fabric can be effectively increased after the composite fabric is compounded with the bottom fabric layer in the subsequent step.
Optionally, the waterproof and moisture-permeable membrane in the step 6) is a polyurethane waterproof and moisture-permeable membrane.
Optionally, the preparation method of the polyurethane waterproof and moisture-permeable film comprises the following steps:
coating a layer of polyurethane solution on the release film, and drying to obtain a polyurethane adhesive film, wherein the thickness of the polyurethane solution coating is 50-250 mu m, and the drying temperature is 80-200 ℃.
Optionally, the polyurethane solution is the same as the polyurethane glue solution in step 1).
The beneficial effects are that:
according to the preparation method of the waterproof moisture-permeable composite cloth, the adhesive solution is coated on the release film firstly, then the release film is dried to form a layer of adhesive film, then the adhesive film is coated with a layer of adhesive solution, and finally the base cloth is attached to the adhesive solution and dried, so that the peeling strength is ensured, and meanwhile, the problem of adhesive penetration of the base cloth is avoided.
The waterproof moisture-permeable cloth prepared by the method provided by the invention has soft hand feeling, can simultaneously have higher peel strength and moisture permeability, and effectively avoids the problems of hardening, flaws and the like caused by glue penetration.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention are further described in detail by the following embodiments. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. Hereinafter, hydrostatic pressure resistance is measured by the method described in "FZ/T01004-2008 coated fabric anti-water repellency measurement", moisture permeability is measured by the method A described in "GB/T12704.2-2009 textile fabric moisture permeability test method evaporation method", and peel strength is measured by the method described in "FZ/T01010-2012 coated fabric coating peel strength".
The invention aims to provide a preparation method of waterproof and moisture permeable composite cloth, which comprises the steps of coating a polyurethane glue solution layer on a release film, pasting surface cloth or base cloth on the glue solution layer, drying and stripping the release film to obtain the surface cloth layer or the base cloth layer, and finally carrying out hot pressing and compounding on the surface cloth layer, the waterproof and moisture permeable film and the base cloth layer which are sequentially arranged to obtain the waterproof and moisture permeable cloth.
Specifically, the method provided by the invention comprises the following steps:
1) Using one or more of DMAc, dimethyl sulfoxide, N-methyl pyrrolidone and dimethylformamide as a solvent to dissolve polyurethane to prepare polyurethane glue solution with the viscosity of 5-30 poise and the solid content of 5-20%;
in the present invention, the polyurethane refers to polyurethane formate or polyurethane urea compounds. The polyurethane is dissolved by adopting polar solvents such as DMAc, dimethyl sulfoxide, N-methylpyrrolidone, dimethylformamide and the like, the used solvents are easier to remove from the polyurethane, and the solvent can be completely recycled, so that the environment is not polluted; the prepared polyurethane glue solution solvent is fully volatilized to obtain the polyurethane glue layer with stable property and skin friendliness and no harm to human body. For the type of polyurethane or polyurethane urea, polyester type or polyether type polyurethane harmless to the human body is preferable, and the polyurethane or polyurethane urea should have a high soft segment ratio, and the prepolymer NCO value of the polyurethane is preferably 1.0% by weight or less to ensure tackiness of the polyurethane.
2) Coating the polyurethane glue solution in the step 1) on a release film, wherein the thickness of the coating is 50-250 mu m, then attaching the surface fabric to the glue solution, and spraying water on the surface fabric for 1-30s;
if the glue solution is directly coated on the surface fabric, the polyurethane glue solution can quickly permeate into the surface fabric or the other surface of the surface fabric, so that the surface fabric is hardened or flawed. According to the invention, the polyurethane glue solution is coated on the release film, and then the surface fabric is attached to the glue solution, so that the pressure between the glue solution and the surface fabric can be reduced, the penetration speed of the glue solution on the surface fabric can be delayed, the time difference between each point in the surface fabric and the contact of the glue solution can be shortened, and the situation that the position on the surface fabric, which is contacted with the glue solution, is soaked before the position on the surface fabric, which is contacted with the glue solution, is just contacted with the glue solution can be avoided. The release film is one or more of a polypropylene film, a low-density polyethylene film, a polycarbonate film and a polyester film.
After the surface cloth is attached to the glue solution, spraying the surface of the surface cloth without the glue solution by using water mist, and wetting the surface cloth, wherein water for spraying can be any known solvent such as desalted water or desalted water+DMAc, and the like, and the effect of the water is to enable polyurethane to be quickly precipitated and solidified from the solvent. When spraying, the polyurethane glue solution is in the process of penetrating into the surface cloth, the surface cloth is wetted at the time, and the solvent such as DMAc in the polyurethane glue solution is diluted after meeting water, so that polyurethane in the solvent is precipitated and solidified and stops in the penetrating process, thereby obtaining the glue layer which is tightly combined with the surface cloth and ensures the peeling strength, and simultaneously avoiding the polyurethane glue solution from penetrating into the other side of the surface cloth. This approach is generally suitable for thicker facings, which typically should have a areal density of greater than 100gsm, preferably greater than 120gsm.
In order to achieve the above effects, the viscosity and the solid content of the polyurethane glue solution are required, if the viscosity of the polyurethane glue solution is too high, the permeation speed of the polyurethane glue solution into the surface fabric is too slow, and the permeation depth of the polyurethane glue solution in the surface fabric is too shallow when the surface fabric is sprayed with water, so that the polyurethane glue layer and the surface fabric cannot be tightly combined; if the viscosity of the polyurethane glue solution is too low, the penetration speed into the surface fabric is too high, and the surface fabric hardening or flaw caused by the penetration of the glue into the surface fabric still can be caused. The viscosity of the polyurethane glue solution in the invention is 5-30 poise, preferably 5-20 poise, more preferably 5-13 poise. The solid content of the polyurethane glue solution is maintained at a certain level, the sizing amount and the peeling strength of the finished product composite cloth are affected by the solid content, and the sizing amount on the composite cloth is too large when the solid content of the polyurethane glue solution is too high, so that the hand feeling of the finished product cloth is hard and the comfort is poor; the low solid content can cause the small sizing amount of the finished cloth, thereby reducing the peeling strength and failing to meet the standard requirement of the peeling strength.
The spray water is adopted instead of the manner of soaking the surface fabric in the water, and the soaking manner may cause the water to contact the polyurethane glue solution coated on the release film, so that the viscosity of the formed adhesive film is affected, and the peeling strength of the composite fabric is affected. The water quantity and the spraying time can be controlled by adopting a spray water mode, so that the water only acts on the polyurethane glue solution permeated into the fabric texture, the polyurethane glue solution can be effectively prevented from permeating into one side of the fabric without gluing, and the adhesiveness of the polyurethane glue is not affected. The spraying time of the water in the invention is 1 to 30 seconds, preferably 5 to 20 seconds, more preferably 5 to 15 seconds, per square meter of the cloth;
3) Drying the surface fabric, and stripping the release film to obtain the surface fabric layer with the polyurethane adhesive layer, wherein the drying temperature is 80-200 ℃ and the drying time is 4-20min;
the surface fabric is dried, so that the polyurethane glue solution is thoroughly solidified, the glue layer and the surface fabric can be combined more tightly, and meanwhile, the residual solvent in the polyurethane glue solution can be removed, so that the harm of the solvent to human bodies is avoided. After the release film is stripped, a layer of polyurethane glue solution is coated on the release film, then the glue layer surface of the surface cloth attached with the polyurethane glue layer is attached to the polyurethane glue solution again, and then drying and stripping operations are carried out, so that the stripping strength of the finally prepared waterproof moisture-permeable cloth finished product can be effectively increased.
4) Coating the polyurethane glue solution obtained in the step 1) on a release film, wherein the thickness of the coating is 50-250 mu m, and drying to obtain a polyurethane film;
5) Coating the polyurethane glue solution in the step 1) on the polyurethane film in the step 4), and then attaching the base fabric to the glue solution;
6) Drying the base fabric, and stripping the release film to obtain the base fabric layer with the polyurethane adhesive layer;
step 4), step 5) and step 6) are the treatment of the base fabric, the treatment method is different from that of the surface fabric, and the polyurethane glue solution is firstly prepared into a glue film, and then the prepared glue film and the base fabric are bonded together by the polyurethane glue. Because the base fabric is generally less dense to ensure a soft hand of the composite fabric, a fabric having an areal density of less than 100gsm, preferably less than 75gsm, is typically used. If the same glue film coating process as that of the surface cloth is adopted, the glue solution is still difficult to avoid penetrating through the base cloth. The inventor adopts a mode of firstly preparing a layer of polyurethane adhesive film on the release film, then applying polyurethane adhesive solution on the polyurethane adhesive film, and finally attaching the base fabric to the adhesive solution to prepare the base fabric layer with the polyurethane adhesive layer. Although the inventor does not understand the principle, in practical operation, the glue solution is effectively prevented from penetrating through the base fabric in the way of step 4) to step 6), and the adhesive has good peeling strength. The polyurethane glue solution used in the step 4) and the polyurethane glue solution used in the treatment of the surface fabric can be the same, and the drying process is the same as that of the surface fabric; the processing parameters of the base fabric can be adaptively modified according to different fabrics or other requirements.
7) The cloth layer, the waterproof moisture permeable membrane and the base cloth layer are arranged in sequence, and are compounded together into the waterproof moisture permeable compound cloth through hot pressing, wherein the compounding temperature is 60-200 ℃, and the pressure is 200-800kg/m 2 . The hydrostatic pressure resistance of the prepared waterproof moisture permeable composite cloth is more than 60KPa, and the moisture permeability is more than 3000 g/(m) 2 24 h), peel strength greater than 25N.
The method comprises the steps of sequentially arranging a surface cloth layer, a waterproof moisture-permeable membrane and a bottom cloth layer, and laminating and hot-pressing to prepare the waterproof moisture-permeable composite cloth, wherein in the lamination process, a polyurethane adhesive layer of the surface cloth layer is laminated with one side of the waterproof moisture-permeable membrane, and a polyurethane adhesive layer of the bottom cloth layer is laminated with the other side of the waterproof moisture-permeable membrane. The polyurethane adhesive layer of the surface cloth layer and the bottom cloth layer mainly plays a role of an adhesive, can tightly adhere the waterproof moisture-permeable film with the surface cloth and the bottom cloth, and ensures the peeling strength of a final product. The waterproof and moisture-permeable membrane is also usually made of polyurethane, so that the polyurethane is also used as an adhesive layer to achieve a good adhesive effect.
The invention is not particularly limited to the selection of the waterproof and moisture-permeable membrane, and can be adaptively selected according to the product requirements. The polyurethane glue solution can spontaneously form a plurality of micropores after film formation, so that the waterproof and moisture permeable effects can be achieved, and for the scheme of the invention, the waterproof and moisture permeable film can be prepared by the following method, so that the purchasing cost is saved, and the preparation method of the polyurethane waterproof and moisture permeable film is as follows:
coating a layer of polyurethane glue solution on the release film, and drying to prepare a polyurethane glue film, wherein the polyurethane glue solution is the same as the polyurethane glue solution in the step 1), the thickness of the coating is 50-250 mu m, and the drying temperature is 80-200 ℃.
The polyurethane glue solution which is the same as that in the step 1) can save production cost, and has better compatibility with glue layers of the surface cloth and the base cloth, thereby playing a better bonding effect.
For the invention, the surface cloth and the base cloth can be common fabrics such as terylene, aramid fiber, polypropylene fiber, viscose fiber, cotton, hemp and the like.
Specific practical examples of the method of the present invention are given below.
Example 1
1) Polyether type polyurethane urea polymer liquid prepared by taking polyether glycol as a soft segment, MDI as a hard segment and DMAc as a solvent through amine chain extension is prepared into polyurethane glue liquid with the temperature of 75 ℃, the viscosity of 10 poise and the solid content of 12 percent;
2) Coating the polyether polyurethane glue solution prepared in the step 1) on a polyester release film, wherein the thickness of the coating is 50 mu m, then attaching an aramid fabric to the glue solution, and spraying water mist on the fabric for 5s;
3) Drying the surface fabric for 8min at 90 ℃, and stripping off the release film after drying to obtain the surface fabric layer with the polyurethane adhesive layer;
4) Coating the polyether polyurethane glue solution obtained in the step 1) on a release film, wherein the thickness of the coating is 50 mu m, and drying the release film for 5min at 90 ℃ to obtain a polyurethane glue film;
5) Coating the polyether polyurethane glue solution in the step 1) on the polyurethane glue film in the step 4), wherein the thickness of the coating is 50 mu m, and then attaching the base fabric to the glue solution;
6) Drying the base fabric for 8min at 90 ℃, and stripping off the release film after drying to obtain the base fabric layer with the polyurethane adhesive layer;
7) Arranging the fabric layer, waterproof and moisture-permeable membrane and the base fabric layer in sequence, wherein the temperature is 90 ℃ and the pressure is 330kg/m 2 The hot pressing rollers are combined together to form the waterproof and moisture permeable composite cloth.
The waterproof moisture-permeable composite cloth prepared by the embodiment has soft hand feeling, no glue permeation phenomenon, hydrostatic pressure resistance of 72Kpa and moisture permeability of 3362 g/(m) 2 24 h), peel strength was 25N.
Example 2
1) Preparing polyester polyurethane polymer solution by using polyester polyol as a soft segment, TDI as a hard segment and DMAc as a solvent through alcohol chain extension, and preparing polyurethane glue solution with the temperature of 75 ℃, the viscosity of 8 poise and the solid content of 15 percent;
2) Coating the polyester polyurethane glue solution obtained in the step 1) on a polypropylene release film, wherein the thickness of the coating is 100 mu m, then attaching polyester surface cloth to the glue solution, and finally spraying water mist on the surface cloth for 12s;
3) Drying the surface fabric for 8min at 110 ℃, and stripping off the release film after drying to obtain the surface fabric with the polyurethane adhesive layer;
4) Coating the adhesive solution prepared in the step 1) on the release film again, wherein the thickness of the coating is 100 mu m, and then attaching the adhesive layer of the surface fabric with the polyurethane adhesive layer obtained in the step 3) to the adhesive solution on the release film;
5) Drying the fabric again for 8min at 110 ℃, and stripping off the release film after drying to obtain the fabric layer with a thickened polyurethane adhesive layer;
6) Coating the polyester polyurethane glue solution obtained in the step 1) on a release film, and drying the release film for 8 minutes in an environment with the coating thickness of 100 mu m and the temperature of 110 ℃ to obtain a polyurethane glue film;
7) Coating the polyester polyurethane glue solution in the step 1) on the polyurethane glue film in the step 6), wherein the thickness of the coating is 50 mu m, and then attaching the polyester base fabric to the glue solution;
8) Drying the base fabric for 8min at 110 ℃, and stripping off the release film after drying to obtain the base fabric layer with the polyurethane adhesive layer;
9) Arranging the surface fabric layer, waterproof and moisture-permeable film and the bottom fabric layer in sequence, wherein the temperature is 150 ℃ and the pressure is 200kg/m 2 The hot pressing rollers are combined together to form the waterproof and moisture permeable composite cloth.
In the embodiment, the finally prepared waterproof and moisture permeable composite cloth has soft hand feeling, no glue penetration phenomenon, hydrostatic pressure resistance of 66Kpa and moisture permeability of 3010 g/(m) 2 24 h), peel strength was 32N.
Claims (9)
1. The preparation method of the waterproof and moisture permeable composite cloth is characterized by comprising the following steps of:
1) One or more of DMAc, dimethyl sulfoxide, N-methyl pyrrolidone and dimethylformamide are used as solvents to dissolve polyurethane and/or polyurethane urea to prepare polyurethane glue solution;
2) Coating the polyurethane glue solution in the step 1) on a piece of surface cloth, and drying the surface cloth to obtain a surface cloth layer with a polyurethane glue film;
3) Coating the polyurethane glue solution obtained in the step 1) on a release film, and drying to obtain a polyurethane film;
4) Coating the polyurethane glue solution in the step 1) on the polyurethane film in the step 3), and then attaching the base fabric to the glue solution;
5) Drying the base fabric, and stripping the release film to obtain the base fabric layer with the polyurethane adhesive film;
6) Arranging the surface fabric layer, the waterproof and moisture-permeable membrane and the bottom fabric layer in sequence, wherein the polyurethane adhesive film of the surface fabric layer is attached to one surface of the waterproof and moisture-permeable membrane, and the polyurethane adhesive film of the bottom fabric layer is attached to the other surface of the waterproof and moisture-permeable membrane, and the surface fabric layer, the waterproof and moisture-permeable membrane and the bottom fabric layer are compounded together through hot pressing to form waterproof and moisture-permeable composite fabric;
wherein, the viscosity of the polyurethane glue solution in the step 1) is 5-30 poise, and the solid content is 5-20%;
the areal density of the base fabric is less than 100gsm.
2. The method for preparing waterproof and moisture permeable composite cloth according to claim 1, wherein the coating thickness of the polyurethane glue solution in the step 3) and the step 4) is 50-250 μm.
3. The method for preparing waterproof and moisture permeable composite cloth according to claim 1, wherein the release film is one or more of a polypropylene film, a low-density polyethylene film, a polycarbonate film and a polyester film.
4. The method for preparing waterproof and moisture permeable composite cloth according to claim 1, wherein the drying temperature in step 2), step 3) and step 5) is 80-200 ℃ and the drying time is 4-20min.
5. According to claimThe method for preparing the waterproof moisture permeable composite cloth according to 1, which is characterized in that in the step 6), the hot pressing temperature is 60-200 ℃, and the hot pressing pressure is 200-800kg/m 2 The hot pressing time is 1-600s.
6. The method for preparing waterproof and moisture permeable composite cloth according to claim 1, wherein the material of the base cloth is one or more of terylene, aramid, polypropylene, viscose, cotton and hemp.
7. The method for preparing waterproof and moisture permeable composite cloth according to claim 1, wherein the waterproof and moisture permeable film in the step 7) is a polyurethane waterproof and moisture permeable film.
8. The method for producing a waterproof moisture-permeable composite cloth according to claim 1, wherein the method for producing the waterproof moisture-permeable film is as follows:
coating a layer of polyurethane solution on the release film, and drying to obtain a polyurethane adhesive film, wherein the thickness of the polyurethane solution coating is 50-250 mu m, and the drying temperature is 80-200 ℃.
9. The method for producing a waterproof and moisture permeable composite cloth according to claim 8, wherein the polyurethane solution is the same as the polyurethane glue solution in step 1).
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003020574A (en) * | 2001-07-05 | 2003-01-24 | Unitica Fibers Ltd | Method for producing moisture-permeating and waterproofing laminated fabric |
| CN114211848A (en) * | 2021-12-28 | 2022-03-22 | 郑州中远氨纶工程技术有限公司 | Preparation method of waterproof and moisture permeable composite cloth |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003020574A (en) * | 2001-07-05 | 2003-01-24 | Unitica Fibers Ltd | Method for producing moisture-permeating and waterproofing laminated fabric |
| CN114211848A (en) * | 2021-12-28 | 2022-03-22 | 郑州中远氨纶工程技术有限公司 | Preparation method of waterproof and moisture permeable composite cloth |
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