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Waterproof and breathable film and preparation method thereof

A technology of waterproof and breathable film and breathable layer, applied in chemical instruments and methods, lamination, application and other directions, can solve the problems of difficult decomposition of PTFE, loss of waterproofness of the film, and high production price of the film, and achieve good toughness and scratch resistance. , Increase toughness and waterproof effect, inhibit the effect of infiltration and penetration

Inactive Publication Date: 2017-09-26
合肥市淑芹美装饰工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the production price of the same film is high
And after wearing for a long time and washing with water, due to the action of oil and surfactant, the water pressure drops rapidly, which makes the film lose its waterproofness.
In addition, because PTFE is difficult to decompose, there has been controversy about its environmental protection, so the EU bans its use on clothes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] (1) Preparation of graphene-modified polyurethane coatings: Weigh graphene oxide and N,N-dimethylformamide 300mL according to the proportion, mix them and place them in an ultrasonic wave for ultrasonic dispersion for 15 minutes, then add isophorone diisocyanate , under the condition of nitrogen protection, react at 80°C for 4h, adjust the pH to 9~10, then raise the temperature to 95°C, add hydrazine hydrate for reduction, wash with N,N-dimethylformamide after the reaction, and dry to obtain Functionalized graphene; then the functionalized graphene is mixed with water-based polyurethane, and placed in an ultrasonic wave for 30 minutes to obtain the graphene-modified polyurethane coating;

[0036] (2) Preparation of graphene-SBS modified asphalt: first crush SBS to a particle size of 200-300 mesh, then mix graphene and crushed SBS evenly to obtain a graphene-SBS composite modifier, and then Add the composite modifier and asphalt matrix into the reaction kettle, stir and ...

Embodiment 2

[0039] A waterproof breathable membrane and a preparation method thereof according to a preferred embodiment of the present invention;

[0040] From top to bottom, the waterproof and breathable membrane is a waterproof and wear-resistant layer, a breathable layer, a base material layer and a tough waterproof layer, and glue is passed between the base material layer and the breathable layer, and between the base material layer and the tough waterproof layer. Adhesive layer connection.

[0041]The waterproof and wear-resistant layer is a graphene-modified polyurethane coating layer, including the following components in parts by weight: 40 parts of polyurethane, 0.5 parts of graphene oxide, 10 parts of isophorone diisocyanate, 3 parts of hydrazine hydrate, and An appropriate amount of solvent N,N-dimethylformamide;

[0042] The breathable layer is an EVA elastic foam layer;

[0043] The tough waterproof layer is a graphene-SBS modified asphalt layer, including the following co...

Embodiment 3

[0051] A waterproof breathable membrane and a preparation method thereof according to a preferred embodiment of the present invention;

[0052] From top to bottom, the waterproof and breathable membrane is a waterproof and wear-resistant layer, a breathable layer, a base material layer and a tough waterproof layer, and glue is passed between the base material layer and the breathable layer, and between the base material layer and the tough waterproof layer. Adhesive layer connection.

[0053] The waterproof and wear-resistant layer is a graphene-modified polyurethane coating layer, including the following components in parts by weight: 60 parts of polyurethane, 3 parts of graphene oxide, 15 parts of isophorone diisocyanate, 10 parts of hydrazine hydrate, and An appropriate amount of solvent N,N-dimethylformamide;

[0054] The breathable layer is an EVA elastic foam layer;

[0055] The tough waterproof layer is a graphene-SBS modified asphalt layer, including the following co...

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Abstract

The invention discloses a waterproof and breathable film and a preparation method thereof. The waterproof and breathable film is provided with a waterproof and wear-resisting layer, a breathable layer, a base material layer and a tough waterproof layer in sequence from top to bottom. The preparation method comprises the following steps: firstly, preparing graphene modified polyurethane paint; then preparing a graphene-SBS (styrene-butadiene-styrene) modified asphalt layer; then expanding the base material layer and coating the upper surface of the base material layer with one layer of adhesive; sticking the breathable layer and coating the upper surface of the breathable layer with one layer of graphene modified polyurethane coating; coating the lower surface of the base material layer with one layer of adhesive and sticking the graphene-SBS modified asphalt layer on the lower surface of the adhesive so as to obtain the waterproof and breathable film. The breathable film disclosed by the invention not only has a relatively good waterproof property, but also has a relatively good breathable property; when the breathable film is applied to clothes, the comfort is increased and a relatively good waterproof effect can be realized.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a waterproof and breathable membrane and a preparation method thereof. Background technique [0002] In recent years, with the improvement of people's quality of life, people have higher and higher requirements for clothing, especially when people are engaged in outdoor sports, such as mountain climbing, they will often encounter rainy and snowy weather. Clothes worn during outdoor sports are generally made of waterproof materials, which must also have a breathable function while being waterproof, so as to increase people's comfort. At present, a variety of waterproof and breathable films have appeared on the market, such as: ① TPU waterproof and breathable film: It is a homogeneous and non-porous film, which uses polyurethane elastomer TPU with hydrophilic groups as the main material. Blow molding process. However, this kind of film has a low melting point (about 120°C),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B11/10B32B27/12B32B27/30B32B33/00B32B37/02B32B37/12B32B38/18C09D7/12C09D175/04C09D195/00
CPCB32B11/10B32B5/022B32B7/12B32B27/12B32B27/306B32B33/00B32B37/02B32B37/12B32B38/1808B32B2255/02B32B2255/102B32B2255/26B32B2266/0221B32B2307/51B32B2307/554B32B2307/558B32B2307/724B32B2307/73B32B2437/00C09D175/04C09D195/00C08L53/02C08K3/04
Inventor 岳佐梅
Owner 合肥市淑芹美装饰工程有限公司
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