Preparation method of polyurethane microporous membrane

A microporous film, polyurethane technology, applied in clothing, clothing, protective clothing, etc., can solve the problems of poor wind resistance, bad hand feel, hard and brittle, etc., and achieves strong cold resistance, wide application prospects, and soft feel.

Inactive Publication Date: 2015-03-25
昆山贝环电子技术服务有限公司
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  • Claims
  • Application Information

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Problems solved by technology

This approach has the following disadvantages: ①Due to the relatively large hole diameter, usually around 0.1mm, the windproof performance is poor. In places where the outdoor wind is strong, because it cannot block the intrusion of cold wind, the warmth retention is not good, which limits its application; ② It is not a non-hydrophilic material, so it does not have the function of actively absorbing moisture and sweating; ③The hand feels bad, and the fabric feels plastic after compounding; ④The cold resistance is not good, and it will become hard and brittle in cold conditions (below -20°C). ; ⑤ can not be naturally degraded, does not meet the current environmental protection requirements

Method used

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  • Preparation method of polyurethane microporous membrane

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Embodiment Construction

[0037] A preparation method of polyurethane microporous film, comprising the following steps:

[0038] 1. Take the composition of the mass parts of each embodiment listed in Table 1 respectively, stir to form the emulsion to be coated, wherein, W / O type polyurethane resin and hydrophilic polyurethane resin that can be miscible with it form polyurethane Blend the resin, and then form a coating solution with various additives such as toluene, methyl ethyl ketone, water, and porogen;

[0039] ② Coating the above-mentioned coating emulsion on the transfer carrier, peeling off after drying to obtain the polyurethane microporous film. When coating, the principle of dry phase transition is mainly used to form a polyurethane microporous film. The pore-forming mechanism is as follows: from the components of the solution to be coated, the solvent used is a mixture of four courtyards, and toluene is a diluent. , methyl ethyl ketone is a solvent, water is a non-solvent, and porogen is al...

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Abstract

The invention discloses a preparation method of a polyurethane microporous membrane, which comprises the following steps: (1) uniformly stirring the following components in parts by mass to form a coating emulsion: 90-100 parts of W/O polyurethane resin, 10-20 parts of hydrophilic polyurethane resin, 15-30 parts of toluene, 25-35 parts of methylethylketone, 10-20 parts of pore-forming agent, 1-2 parts of crosslinking agent, 0.2-1.0 part of releasing agent, 0.2-1.0 part of anti-skinning agent, 0.5-1.5 parts of leveling agent, 1-3 parts of water-sprinkling agent, 40-60 parts of deionized water and 1-10 parts of color paste; and (2) coating the coating emulsion to a transfer carrier, drying, and peeling to obtain the polyurethane microporous membrane. The polyurethane microporous membrane prepared by the preparation method has the functions of windproofness and ventilation and the function of actively absorbing moisture and discharging sweat, and is applicable to different clothing facing materials.

Description

technical field [0001] The invention relates to a preparation method of polyurethane microporous film. Background technique [0002] With the progress of society, the vigorous development of outdoor sports and the improvement of people's living standards, people not only have requirements for clothing styles, fabrics and other external aspects, but also pay more and more attention to some internal quality and functionality. The combination of windproof, breathable, moisture-absorbing and sweat-conducting materials with textile fabrics will greatly expand the application of some textile fabrics, such as down jackets, morning exercise clothes, thermal underwear, windbreakers, etc. There is a wide range of demand. Some people have used ordinary plastic films (such as polyethylene, polypropylene, polyvinyl chloride) to punch holes to produce some breathable films for composite applications of textile fabrics. This approach has the following disadvantages: ①Due to the relatively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L75/04A41D31/00
Inventor 赵锋
Owner 昆山贝环电子技术服务有限公司
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