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Waterproof and moisture-permeable film and preparation and application thereof

A moisture-permeable film and composite film technology, applied in textiles and papermaking, chemical instruments and methods, lamination, etc., can solve problems such as poor film strength and low production efficiency, and achieve poor strength, improve strength, and solve low productivity. Effect

Active Publication Date: 2020-08-14
湖州因爱伟大卫生用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a waterproof and moisture-permeable membrane and its preparation and application to overcome the problems of low production efficiency and poor membrane strength

Method used

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  • Waterproof and moisture-permeable film and preparation and application thereof
  • Waterproof and moisture-permeable film and preparation and application thereof
  • Waterproof and moisture-permeable film and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The preparation method of electrospun 15μ thick microporous mesoporous membrane: 15μ refers to the thickness, and the pore diameter is about 150 nanometers.

[0039] Production process: (PU spraying + electrospinning) - heating and curing film formation - fabric hot-melt lamination - washing and drying - finished product.

[0040] Among them, the PU spraying + electrospinning spinning process is carried out by three spraying and three spinning methods. The feeding ratio of the three-stage process is: the first stage is 32.5% PU + 0.5% PEO, the second stage is 33.5% PU + 0.5% PEO , the third paragraph 32% PU + 1% PEO. (mass percentage)

[0041] Specific parameters: PEO electrospinning spinning process, the first static voltage is 50KV, the second static voltage is 50KV, the third static voltage is 75KV, and the spinning height is 25cm; PU spraying process, the spray height is 30cm, and the spray particle size is 30-80 Micron.

[0042] Among them, the PEO used has a mo...

Embodiment 2

[0048] High permeability 10μ waterproof and moisture-permeable membrane production process, with a pore size of about 200nm

[0049] Production process: (PU spraying + electrospinning) - heating and curing film forming - fabric hot-melt lamination - washing and drying - finished product

[0050] Among them, the PU spraying + electrospinning drawing process is carried out by two spraying and three drawing methods. The ratio of process materials is: 0.5% PEO in the first section of electrospinning drawing, 40% PU + 2.5% PEO in the second section, and 40% PU + 2.5% PEO in the second section. Three sections of 60% PU+2% PEO; (by mass percentage)

[0051] Specific parameters: PEO electrospinning process, the first static voltage is 50KV, the second static voltage is 80KV, the third static voltage is 75KV, and the spinning height is 25cm; PU spraying process, the spray height is 30cm, and the spray particle size is 30-80 Micron.

[0052] Among them, PEO has a molecular weight of 9...

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Abstract

The invention relates to a waterproof and moisture-permeable film and preparation and application thereof. The moisture-permeable film is prepared by the steps that in PU moisture-permeable pulp, polyoxyethylene (PEO) is drawn into superfine fibers through an electrostatic spinning technology and the superfine fibers are implanted therein, water-soluble PEO is dissolved out through water washing after film forming and attaching, microporous channels are formed in the film, and the microporous waterproof and moisture-permeable effects are achieved. Compared with a PU film, the moisture permeability of the novel waterproof and moisture-permeable film is improved by 30%-80%, the strength is improved by 100%-150% compared with an electrostatic spinning film, and the attaching performance and the subsequent processability are better.

Description

technical field [0001] The invention belongs to the field of moisture-permeable membrane material and its preparation and application, in particular to a waterproof and moisture-permeable membrane and its preparation and application. Background technique [0002] Waterproof and moisture permeable are outdoor products, occupying a very large proportion. Traditional waterproof and moisture-permeable products are basically processed by laminating two or three layers, that is, the outer layer is waterproof fabric, and the middle layer is a film layer. In addition, the inner layer can also be added as a third layer to avoid direct contact between the membrane and the body. [0003] Among them, there are two main functions of the membrane: one is water pressure resistance, which prevents water from penetrating into the inner layer through the gap of the fabric under a certain pressure; , from the inner layer of the garment to the outer layer to maintain the comfort of the body. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/20B32B27/30B32B33/00B32B37/02B32B37/06B32B3/24B32B27/02B32B27/12D04H1/4382D04H1/728
CPCB32B3/266B32B5/02B32B5/26B32B27/12B32B27/20B32B33/00B32B37/02B32B37/06B32B2250/02B32B2250/20B32B2255/02B32B2255/26B32B2262/0223B32B2307/726D04H1/4382D04H1/728
Inventor 李景川覃小红权震震王荣武张弘楠
Owner 湖州因爱伟大卫生用品有限公司
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