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Non-porous breathable film as well as preparation method and application thereof

A film and surface structure technology, applied in applications, chemical instruments and methods, building components, etc., can solve the problems of film separation, high production cost, poor film flexibility, etc., to reduce elastic modulus, improve adhesion performance, The effect of improving flexibility

Active Publication Date: 2019-11-22
沈勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The film structure is single and the production cost is high, especially the single film surface structure, which cannot meet the use of various lamination processes;
[0005] 2. For a single-layer breathable film, because its material melting point is as high as 220°C, and in the downstream fabric process, its bonding temperature is 190-220°C, so in this bonding process, the film will appear "warping" , even when the film is separated from the fabric;
[0006] 3. If the temperature of the lamination process of the fabric is raised to above 220°C, the single-layer breathable film will melt and turn white during the lamination process of the fabric;
[0007] 4. Since the single-layer breathable film is made of polyether ester material with high modulus, the flexibility of the film is poor, and it has a strong "plastic feeling" after being bonded to the fabric

Method used

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  • Non-porous breathable film as well as preparation method and application thereof
  • Non-porous breathable film as well as preparation method and application thereof
  • Non-porous breathable film as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A non-porous and breathable film comprising an upper layer, a middle layer and a lower layer, the middle layer is a core layer structure, the upper layer and the lower layer are different surface layer structures, the thickness of the film is 20 μm, and the width is 500-2600 mm; wherein, the thickness of the middle layer is 12.0 μm , the thickness of the upper layer is 3.0 μm, and the thickness of the lower layer is 5.0 μm.

[0042] The carrier resin used in the core structure is copolyether ester, and the melting point of the resin is 220°C. The copolyether ester is composed of hard segment ester resin and soft segment ether resin. The weight ratio is 80:20; wherein, the hard-segment ester resin is benzoate, and the soft-segment ether resin is fatty ether. Functional additives including an anti-UV agent and an anti-adhesive agent are also added to the core layer structure, wherein the weight of the anti-UV agent accounts for 0.5% of the film weight, and the weight of t...

Embodiment 2

[0048] A non-porous and breathable film, comprising an upper layer, a middle layer and a lower layer, the middle layer is a core layer structure, the upper layer and the lower layer have the same surface layer structure, the thickness of the film is 30 μm, and the width is 500-2800 mm; wherein, the thickness of the middle layer is 22.0 μm , the thickness of the upper and lower layers is 4.0 μm.

[0049] The carrier resin used in the core structure is copolyether ester, the melting point of which is 220°C. The copolyether ester is composed of hard segment ester resin and soft segment ether resin. The weight of hard segment ester resin and soft segment ether resin is The ratio is 80:20; wherein, the hard segment ester resin is benzoate, and the soft segment ether resin is fatty ether. Functional additives including an anti-UV agent and an anti-adhesive agent are also added to the core layer structure, wherein the weight of the anti-UV agent accounts for 0.4% of the weight of the...

Embodiment 3

[0055] A non-porous and breathable film comprising an upper layer, a middle layer and a lower layer, the middle layer is a core layer structure, the upper layer and the lower layer are different surface layer structures, the thickness of the film is 30 μm, and the width is 500-2800 mm; wherein, the thickness of the middle layer is 20.0 μm , the thickness of the upper layer is 4.0 μm, and the thickness of the lower layer is 6.0 μm.

[0056] A non-porous and breathable film, the film has a three-layer structure in the shape of "A / B / C", the thickness of the film is 30 μm, and the width is 500-2800 mm; among them, the "B" layer is the core layer with a thickness of 20.0 μm The "A" layer is the surface structure with a thickness of 4.0 μm, and the "C" layer is the surface structure with a thickness of 6.0 μm.

[0057] The carrier resin used in the core layer structure is copolyether ester, the melting point of which is 230°C. The copolyether ester is composed of hard segment ester ...

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Abstract

The invention discloses a non-porous breathable film and application thereof. The film comprises a core layer structure and same or different surface layer structures on the upper side and the lower side of the core layer structure, wherein the material of the core layer structure is copolymerized polyether ester, and the material of the surface layer structures is block copolymerized polyether ester. The film has the characteristics of high air permeability, excellent water pressure resistance, ultraviolet resistance, no yellowing after long-time use and the like, and can be used for preparing textile or shoe material composite fabrics with low cost and good air permeability, antibacterial and air-permeable medical composite fabrics, building composite fabrics with requirements on air permeability and the like. The invention further discloses a method for preparing the film, the method is an extrusion casting method, the cost is low, the efficiency is high, and the method is suitablefor mechanical production.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a non-porous and air-permeable film and its preparation method and application. Background technique [0002] Non-porous breathable film is a film that can pass through air and other gases, but can block liquids. It is easy to ventilate, has the characteristics of soft fabrics, and is also waterproof because it can block liquids. Non-porous breathable film is a functional material, also known as "breathable film", which is usually used in occasions that require both breathability and waterproof. This special function makes it have a position that other films cannot replace. [0003] The current non-porous breathable film is a single-layer structure, which is extruded from a hydrophilic resin through a single-layer die. The structure of the film is a single structure, which has the following disadvantages: [0004] 1. The film structure is single and the production cost is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/06B32B27/28B32B7/02B32B27/20B32B33/00B29C48/18B29C48/92
CPCB32B27/08B32B27/28B32B7/02B32B27/20B29C48/18B29C48/92B32B2307/31B32B2307/724B32B2307/73B32B2437/00B32B2437/02B32B2419/00B29C2948/92704
Inventor 沈勇
Owner 沈勇
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