CN106079633B - The ventilative laminated film of weaving face fabric - Google Patents

The ventilative laminated film of weaving face fabric Download PDF

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Publication number
CN106079633B
CN106079633B CN201610477974.8A CN201610477974A CN106079633B CN 106079633 B CN106079633 B CN 106079633B CN 201610477974 A CN201610477974 A CN 201610477974A CN 106079633 B CN106079633 B CN 106079633B
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film
parts
pore type
polyurethane
polytetrafluoroethylene
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CN106079633A (en
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张子睿
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Kunshan Huayang New Material Ltd Co
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Kunshan Huayang New Material Ltd Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/08—Heat resistant; Fire retardant
    • A41D31/085—Heat resistant; Fire retardant using layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
    • A41D31/102—Waterproof and breathable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
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    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/141—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • C—CHEMISTRY; METALLURGY
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    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
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Abstract

The present invention discloses a kind of weaving face fabric ventilative laminated film, including pore type polyurethane film, polytetrafluoroethylene film, is bonded between the pore type polyurethane film, polytetrafluoroethylene film by adhesive layer；Prefabricated polyurethane slurry is composed of the following components：Polyurethane resin, dimethylformamide, toluene, butanone, microspheres, one butanediol of Isosorbide-5-Nitrae, polyacrylamide, acrylate, organosiloxane lotion；Adhesive layer is composed of the following components：Polyurethane resin, dimethylformamide, toluene, ethyl acetate, microspheres, crane span structure agent, accelerating agent, silane coupling agent.The composite microporous film of the present invention avoids, since pore type polytetrafluoroethylene film layer adsorbs the materials such as dust, the salt in sweat, grease cosmetics and the detergent in empty vapour, realizing the waterproof for keeping stable for a long time and perspiring vapour performance.

Description

The ventilative laminated film of weaving face fabric
Technical field
The present invention relates to a kind of weaving face fabric laminated film of breathing freely, belong to technical field of textile fabric.
Background technology
Polyurethane film is increasingly being applied to the preparation of ready-made clothes and fashionable dress in recent years, using ventilative polyurethane film Clothes prepared by material not only have respiratory function, additionally it is possible to antistatic；Polyurethane film is in sportswear and product with system Make fabric and the linings such as diving suit, swimsuit, rhythm clothing and air Landing clothes, Aerated water bed, ball liner, boat, lifebuoy Material.Shape memory polyurethane film newly developed, has good crystallinity, and blocks aggregate plays the work of physical crosslinking point into microcell With controlling the shape of shape memory polyurethane to fix and recover, the shape memory temperature of these shape memory polyurethanes be set to Room temperature, for producing compound fabric, as household clothing fabric, can play thermal effect, more than room temperature below room temperature There can be good water vapour permeability.Thermoplasticity polyurethane film has soft feel good, and intensity is high, windproof ventilative, environmentally protective It is widely used in textile composite fabric etc. outstanding feature, for fields such as sports and leisure, special type protections.The poly- ammonia of the prior art Ester film is mostly the film of hydrophilic, its water proofing property is poor, shows as water-swellable, its gas permeability is also poor in addition.
The content of the invention
It is an object of the present invention to provide a kind of weaving face fabric with ventilative laminated film, the composite microporous film improve elasticity and Adaptability, has high intensity, does not absorb water, wear-resisting property, while improves heat resistance.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：A kind of ventilative laminated film of weaving face fabric, including Pore type polyurethane film, polytetrafluoroethylene film, pass through glue between the pore type polyurethane film, polytetrafluoroethylene film Adhesion coating bond, the polytetrafluoroethylene film per square inch hole number be 85 ~ 9,500,000,000, the average diameter of described hole For 0.2 μm ~ 10 μm；
The pore type polyurethane film is scratched in silicon oil release paper and successively 80 ~ 150 by prefabricated polyurethane slurry The baking oven baking of temperature gradient is spent, being cooled to room temperature again after reaching 150 degree and keeping the temperature obtains；
The prefabricated polyurethane slurry is composed of the following components：
100 parts of polyurethane resin,
20 ~ 25 parts of dimethylformamide,
32 ~ 35 parts of toluene,
12 ~ 15 parts of butanone,
8 ~ 9 parts of microspheres,
1.5 ~ 2.5 parts of one butanediol of Isosorbide-5-Nitrae,
1.2 ~ 1.8 parts of polyacrylamide,
0.3 ~ 0.5 part of acrylate,
0.2 ~ 0.3 part of organosiloxane lotion；
The adhesive layer is composed of the following components：
100 parts of polyurethane resin,
12 ~ 15 parts of dimethylformamide,
Toluene（TOL）4 ~ 6 parts,
7 ~ 9 parts of ethyl acetate,
4 ~ 6 parts of microspheres,
0.2 ~ 0.4 part of crane span structure agent,
0.15 ~ 0.25 part of accelerating agent,
1.2 ~ 2 parts of silane coupling agent.
Further improved technical solution is as follows in above-mentioned technical proposal：
Preferably, the volume of the polytetrafluoroethylene film Hole accounts for the 80 ~ 90% of polytetrafluoroethylene film volume.
Preferably, the mass ratio between the polytetrafluoroethylene film and pore type polyurethane film is 1：6.5 ~ 7, it is thick Degree is than being 1：0.3~0.6.
Preferably, the baking oven baking of 80 ~ 150 degree of temperature gradients was specifically included with the next stage：
The first stage：Under conditions of 80 DEG C, and carried out under the empty vapour atmosphere of low speeds flow；
Second stage：Under conditions of 90 DEG C, and carried out under the empty vapour atmosphere of middling speed flowing；
Phase III：Under conditions of 110 DEG C, and carried out under the empty vapour atmosphere of strong speed flowing；
Fourth stage：Under conditions of 140 DEG C, and carried out under the empty vapour atmosphere of low speeds flow.
Preferably, the microspheres are akzonobel companies microspheres, contain in its flexible shell The low-boiling point materials such as iso-butane, propane, pentane.
Since above-mentioned technical proposal is used, the present invention has following advantages and effect compared with prior art：
1. the ventilative laminated film of weaving face fabric of the present invention, can be to avoid due to pore type polytetrafluoroethylene film layer The materials such as dust, the salt in sweat, grease cosmetics and detergent in the empty vapour of absorption, realize and keep steady for a long time Fixed waterproof and perspire vapour performance；Secondly, combine with layer of polyurethane and polytetrafluoroethylene film layer, improving external resistance Only while rainwater performance, there is the performance for enhancing internally discharge human body sweat vapour so that fabric has more preferably comfort property With broader practice scope；Again, since this two-component thin-film material has a large amount of uniform holes, and with hydrophilic The microvoid polyurethane resin bed of the type of oil is refused, so as to be more advantageous to the discharge from human body water vapour, it is poly- to greatly reduce residual The moisture of urethane thin-film surface, thus improve the wearability of coating fabric and dress it is dry and comfortable, most importantly significantly The elasticity of PTFE film material is improved, makes clothes clothes that also there is good power under high sharp movement and extreme condition Learn performance.
2. the ventilative laminated film of weaving face fabric of the present invention, for the particular combination with polytetrafluoroethylene film, optimizes The formula of pore type polyurethane film, so as to improve elasticity and adaptability, while has high intensity, does not absorb water, wear-resisting property； Secondly, the present invention is formulated above-mentioned solvent and silane coupling agent using special adhesive and is chosen so that adhesive and polytetrafluoroethyl-ne There is more preferable bond properties between alkene film, while improve heat resistance, resist cold reachable less than -150 DEG C, it is heat-resisting it is reachable+ 150 DEG C,（2136 standards of ISO）Resistance to tortuous 9000 nothings are split.
Embodiment
With reference to embodiment, the invention will be further described：
Embodiment 1：A kind of ventilative laminated film of weaving face fabric, it is characterised in that：Including pore type polyurethane film, gather Tetrafluoroethene film, is bonded, the polytetrafluoro between the pore type polyurethane film, polytetrafluoroethylene film by adhesive layer Vinyl film per square inch hole number be 85 ~ 9,500,000,000, the average diameter of hole is 0.2um ~ 10um；
The pore type polyurethane film is scratched in silicon oil release paper and successively 80 ~ 150 by prefabricated polyurethane slurry The baking oven baking of temperature gradient is spent, being cooled to room temperature again after reaching 150 degree and keeping the temperature obtains；
The prefabricated polyurethane slurry is composed of the following components：
100 parts of polyurethane resin,
22 parts of dimethylformamide,
32 parts of toluene,
13 parts of butanone,
8.5 parts of microspheres,
1.8 parts of one butanediol of Isosorbide-5-Nitrae；
1.5 parts of polyacrylamide；
0.35 part of acrylate,
0.25 part of organosiloxane lotion.
The adhesive layer is composed of the following components：
100 parts of polyurethane resin,
12 parts of dimethylformamide,
Toluene（TOL）5 parts,
8 parts of ethyl acetate,
5 parts of microspheres,
0.3 part of crane span structure agent,
0.2 part of accelerating agent,
1.5 parts of silane coupling agent.
The volume of above-mentioned polytetrafluoroethylene film Hole accounts for the 80 ~ 82% of polytetrafluoroethylene film volume.
Mass ratio between above-mentioned polytetrafluoroethylene film 2 and pore type polyurethane film 1 is 1：6.5 ~ 7, thickness ratio is 1：0.3~0.6.
The baking oven baking of above-mentioned 80 ~ 150 degree of temperature gradients was specifically included with the next stage：
The first stage：Under conditions of 80 DEG C, and carried out under the empty vapour atmosphere of low speeds flow；
Second stage：Under conditions of 90 DEG C, and carried out under the empty vapour atmosphere of middling speed flowing；
Phase III：Under conditions of 110 DEG C, and carried out under the empty vapour atmosphere of strong speed flowing；
Fourth stage：Under conditions of 140 DEG C, and carried out under the empty vapour atmosphere of low speeds flow.
Above-mentioned microspheres are akzonobel companies microspheres, contain iso-butane, third in its flexible shell The low-boiling point materials such as alkane, pentane.
Embodiment 2：A kind of ventilative laminated film of weaving face fabric, it is characterised in that：Including pore type polyurethane film, gather Tetrafluoroethene film, is bonded, the polytetrafluoro between the pore type polyurethane film, polytetrafluoroethylene film by adhesive layer Vinyl film per square inch hole number be 85 ~ 9,500,000,000, the average diameter of hole is 0.2um ~ 10um；
The pore type polyurethane film is scratched in silicon oil release paper and successively 80 ~ 150 by prefabricated polyurethane slurry The baking oven baking of temperature gradient is spent, being cooled to room temperature again after reaching 150 degree and keeping the temperature obtains；
The prefabricated polyurethane slurry is composed of the following components：
100 parts of polyurethane resin,
25 parts of dimethylformamide,
35 parts of toluene,
15 parts of butanone,
9 parts of microspheres,
2.2 parts of one butanediol of Isosorbide-5-Nitrae；
1.8 parts of polyacrylamide；
0.4 part of acrylate,
0.3 part of organosiloxane lotion.
The adhesive layer is composed of the following components：
100 parts of polyurethane resin,
15 parts of dimethylformamide,
6 parts of toluene,
9 parts of ethyl acetate,
4.5 parts of microspheres,
0.25 part of crane span structure agent,
0.25 part of accelerating agent,
1.8 parts of silane coupling agent.
The volume of above-mentioned polytetrafluoroethylene film Hole accounts for the 87 ~ 89% of polytetrafluoroethylene film volume.
Mass ratio between above-mentioned polytetrafluoroethylene film 2 and pore type polyurethane film 1 is 1：6.5 ~ 7, thickness ratio is 1：0.3~0.6.
Above-mentioned microspheres are akzonobel companies microspheres, contain iso-butane, third in its flexible shell The low-boiling point materials such as alkane, pentane.
Specific targets numerical value of the present invention is as follows：
A. before hydrostatic pressing value is washed>12000mmH2O, after five washings>8000mmH2O（Washing methods ISO 6330, test Method ISO 811）,
B. vapor transfer rate：10000g/m2·24h（JIS 1099 A1）,
C. anti-flammability passes through（GB8965.2-2009）Criterion is B grades,
D. peel strength（GB11042-89）：4N,
E. resist cold reachable less than -150 DEG C, heat-resisting reachable+150 DEG C,（2136 standards of ISO）Resistance to tortuous 9000 nothings are split,
F films extensibility 25%,
G films response rate 96%,
H. wind-proof performance：It is completely windproof（>10 grades）,
I. thermal impedance（GB/T 11048-2008 A methods）：0.1097m²·K/W.
During using above-mentioned weaving face fabric with ventilative laminated film, can be to avoid due to pore type polytetrafluoroethylene film layer The materials such as dust, the salt in sweat, grease cosmetics and detergent in the empty vapour of absorption, realize and keep steady for a long time Fixed waterproof and perspire vapour performance；Secondly, combine with the hydrophilic layer of polyurethane and polytetrafluoroethylene film layer for refusing oil, carrying While high external prevention rainwater performance, there is the performance for enhancing internally discharge human body sweat vapour so that fabric has more Good comfort property and broader practice scope；Again, since this two-component thin-film material has a large amount of uniform holes, with And the microvoid polyurethane resin bed with the hydrophilic type for refusing oil, so as to be more advantageous to the discharge from human body water vapour, drop significantly The moisture of low residual polyurethane film layer surface, so that improve the wearability of coating fabric and dress is dry and comfortable, it is most main What is wanted is the elasticity for substantially increasing PTFE film material, clothes clothes is also had under high sharp movement and extreme condition There is good mechanical property；Secondly, the present invention can using the selection of the above-mentioned solvent of special adhesive formula and silane coupling agent Make that there is more preferable bond properties between adhesive and polytetrafluoroethylene film, while improve cold tolerance, resist cold it is reachable- Less than 150 DEG C, heat-resisting reachable+150 DEG C,（2136 standards of ISO）Resistance to tortuous 9000 nothings are split.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, should be covered by the protection scope of the present invention.

Claims (1)

  1. A kind of 1. ventilative laminated film of weaving face fabric, it is characterised in that：It is thin including pore type polyurethane film, polytetrafluoroethylene (PTFE) Film, is bonded between the pore type polyurethane film, polytetrafluoroethylene film by adhesive layer；
    The pore type polyurethane film is scratched in silicon oil release paper and successively in 80 ~ 150 degree of temperature by prefabricated polyurethane slurry The baking oven baking of gradient is spent, being cooled to room temperature again after reaching 150 degree and keeping the temperature obtains, every square of the polytetrafluoroethylene film The number of inch openings is 85 ~ 9,500,000,000, and the average diameter of described hole is 0.2 μm ~ 10 μm；
    The prefabricated polyurethane slurry is composed of the following components：
    100 parts of polyurethane resin,
    20 ~ 25 parts of dimethylformamide,
    32 ~ 35 parts of toluene,
    12 ~ 15 parts of butanone,
    8 ~ 9 parts of microspheres,
    1.5 ~ 2.5 parts of one butanediol of Isosorbide-5-Nitrae,
    1.2 ~ 1.8 parts of polyacrylamide,
    0.3 ~ 0.5 part of acrylate,
    0.2 ~ 0.3 part of organosiloxane lotion；
    The adhesive layer is composed of the following components：
    100 parts of polyurethane resin,
    12 ~ 15 parts of dimethylformamide,
    Toluene（TOL）4 ~ 6 parts,
    7 ~ 9 parts of ethyl acetate,
    4 ~ 6 parts of microspheres,
    0.2 ~ 0.4 part of crane span structure agent,
    0.15 ~ 0.25 part of accelerating agent,
    1.2 ~ 2 parts of silane coupling agent；
    The volume of the polytetrafluoroethylene film Hole accounts for the 80 ~ 90% of polytetrafluoroethylene film volume；
    The polytetrafluoroethylene film（2）With pore type polyurethane film（1）Between mass ratio be 1：6.5~7；
    The polytetrafluoroethylene film（2）With pore type polyurethane film（1）Thickness ratio is 1：0.3~0.6.
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