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Polyurethane microporous water-proof and moisture permeable film prepared by using solidification method and preparation method thereof

A waterproof and moisture-permeable polyurethane technology, applied in chemical instruments and methods, coatings, layered products, etc., can solve the problems of high price, rapid water pressure drop, loss of water resistance, etc., and achieve good surface strength and low wet resistance Effect

Active Publication Date: 2011-09-07
江苏唐古拉聚合材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its price is high, and after long-term wearing and washing, due to the action of oil stains and surfactants, the water pressure drops rapidly, and instead loses waterproofness

Method used

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  • Polyurethane microporous water-proof and moisture permeable film prepared by using solidification method and preparation method thereof
  • Polyurethane microporous water-proof and moisture permeable film prepared by using solidification method and preparation method thereof
  • Polyurethane microporous water-proof and moisture permeable film prepared by using solidification method and preparation method thereof

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Embodiment Construction

[0045] A method for preparing a solidified polyurethane microporous waterproof and moisture-permeable film, comprising the following steps:

[0046] 1. Prepare wet coating working fluid and dry direct coating working fluid respectively, wherein, said wet coating working fluid and dry direct coating working fluid respectively comprise the components of mass parts as shown in Table 1; The dry direct coating working solution includes the following components in parts by mass;

[0047] Wherein, the 100% modulus of the polyether polyurethane resin is 60-120kg / cm 2 ;

[0048] The 100% modulus of the waterproof and moisture-permeable polyurethane resin is 30-80kg / cm 2 ;

[0049] ② Coat the wet coating working liquid on the transfer carrier, and solidify it into a film in an aqueous solution of dimethylformamide (DMF) with a mass concentration of 16-22%, then wash it with water, and dry it into a roll to obtain a polyurethane microstructure. Porous film layer;

[0050] ③Apply the...

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Abstract

The invention discloses a polyurethane microporous water-proof and moisture permeable film prepared by using a solidification method and a preparation method thereof. The method comprises the following steps of: firstly, preparing a wet coating working liquid and a dry direct coating working liquid; then coating the wet coating working liquid on a transfer carrier, solidifying in the aqueous solution of dimethylformamide (DMF) at mass concentration of 16-22 percent to form a film, washing, drying and coiling to obtain a polyurethane microporous film layer; coating the dry direct coating working liquid on the polyurethane microporous film layer and drying to form a protective layer; and separating the polyurethane microporous film layer and the protective layer from the transfer carrier together so as to form the polyurethane microporous water-proof and moisture permeable film. The film has a two-layer structure, wherein one layer is the polyurethane microporous layer and the other layer is the protective layer. The film structurally has a microporous form and has performances such as non-swelling, water-proofing, moisture permeability, air permeability and the like.

Description

technical field [0001] The invention relates to a solidification method polyurethane microporous waterproof and moisture-permeable film and a preparation method thereof. Background technique [0002] In recent years, with the vigorous development of outdoor sports such as mountaineering, skiing, and sailing, and the special needs of some powerful departments (such as the army, police, etc.) for clothing fabrics, a variety of functional waterproof and moisture-permeable films have been developed and applied to textiles. Composite to produce clothing fabrics with waterproof and moisture-permeable functions, which are applied to functional clothing. Among the representative products are: [0003] ①TPU waterproof and moisture-permeable film: TPU waterproof and moisture-permeable film is a homogeneous and non-porous film. It uses polyurethane elastomer TPU with hydrophilic groups as the main material, and is processed by salivation or blow molding. The film has high water press...

Claims

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Application Information

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IPC IPC(8): C08J9/36C08J9/28C08J7/04C08J5/18C08L75/08C08L75/04B32B3/24B32B27/40B32B27/18
Inventor 夏汉忠
Owner 江苏唐古拉聚合材料有限公司
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