Dry-to-release-method polyurethane microporous waterproof moisture-permeable film and preparation method thereof
A waterproof and moisture-permeable, polyurethane technology, applied in polyurea/polyurethane coatings, chemical instruments and methods, coatings, etc., can solve the problems of high production price of film, loss of waterproofness of film, rapid drop of water pressure, etc.
Active Publication Date: 2014-04-16
昆山华富新材料股份有限公司
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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
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[0026] A method for preparing a dry-type spin-off polyurethane microporous waterproof and moisture-permeable film, the method for producing the polyurethane microporous waterproof and moisture-permeable film mainly includes the following steps:
[0027] ①Use HR-1 type polyurethane resin to make a surface layer coating emulsion; apply the surface layer coating emulsion on the transfer carrier, and then dry to form the surface layer 1 of the film;
[0028] The above-mentioned HR-1 type polyurethane resin is a light yellow, transparent, slightly turbid, non-yellowing polyether water-oil amphoteric polyurethane resin containing a solvent. The solvent contained in the HR-1 type polyurethane resin is composed of isopropanol, toluene, N,N-di Methylformamide is composed of a mixture of 4.5:4.5:1 by weight, and the viscosity of the polyurethane resin is 15000-25000cps / 25℃, the non-volatile content is 23.5-26.5%, the 100% modulus is 4.0-5.0MPa, and the elongation Efficiency > 500%, tens...
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Abstract
The invention discloses a dry-to-release-method polyurethane microporous waterproof moisture-permeable film and a preparation method thereof. The preparation method comprises the following steps of: respectively coating two kinds of hydrophilic and oleophylic polyurethane resin serving as materials of a surface layer and a microporous layer on the surface of a polyethylene terephthalate (PET) film or plane release paper; drying, foaming and forming in a drying room under certain conditions respectively; and cooling, releasing and coiling to form the dry-to-release-method polyurethane microporous waterproof moisture-permeable film. The film has a microporous structural form and non-swelling, waterproof, moisture-permeable, air-permeable properties and the like.
Description
technical field [0001] The invention relates to a waterproof and moisture-permeable film, in particular to a dry-type spin-off type 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, clothing fabrics with waterproof and moisture-permeable functions have been produced. The materials used in these functional clothing are mainly made of a variety of functional waterproof and moisture-permeable films. Among the representative products are: [0003] ①. TPU 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 blo...
Claims
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IPC IPC(8): B32B3/24B32B27/08B32B27/18B32B27/40C08J7/04C09D175/08
Inventor 夏汉忠
Owner 昆山华富新材料股份有限公司