Waterproof and moisture permeable type thermoplastic polyurethane film and preparation method thereof

A thermoplastic polyurethane, waterproof and moisture-permeable technology, applied in the field of film, can solve problems such as inappropriate use, and achieve the effect of ensuring free permeation, preventing permeation, and optimizing the molding process

Inactive Publication Date: 2015-03-25
JIANGSU HONGYUAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water vapor transfers from the side with high humidity to the side with low humidity, the thinner the film, the better the moisture permeability; however, it is not suitable for use in harsh environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First, the raw materials for the preparation of waterproof and moisture-permeable thermoplastic polyurethane films are selected: 81% thermoplastic polyurethane, 9% slip agent and 10% matte agent; wherein, the preparation raw materials for the thermoplastic polyurethane include: polytetramethylene 60 parts of ether glycol, 32 parts of toluene diisocyanate, 6 parts of ethylene glycol ethyl ether acetate and 2 parts of dibutyltin diacetate;

[0017] Then, the above-mentioned raw materials are stirred evenly in the feed bucket;

[0018] Then, dry through a dehumidifier to control the moisture content of the above-mentioned raw materials to be less than or equal to 0.02%;

[0019] Next, after being plasticized by the screw of the extruder, it is extruded through the die opening; the temperature of the screw of the extruder is controlled in five stages during plasticization, and the temperatures are: 180°C, 190°C, 205°C, 210°C and 205°C; the plasticizing speed of the screw i...

Embodiment 2

[0023] First, the raw materials for the preparation of waterproof and moisture-permeable thermoplastic polyurethane films are selected: 83% thermoplastic polyurethane, 9% slip agent and 8% matte agent; wherein, the preparation raw materials for the thermoplastic polyurethane include: polytetramethylene 58 parts of ether diol, 35 parts of toluene diisocyanate, 6 parts of ethylene glycol ethyl ether acetate and 2 parts of dibutyltin diacetate;

[0024] Then, the above-mentioned raw materials are stirred evenly in the feed bucket;

[0025] Then, dry through a dehumidifier to control the moisture content of the above-mentioned raw materials to be less than or equal to 0.02%;

[0026] Next, after being plasticized by the screw of the extruder, it is extruded through the die opening; the temperature of the screw of the extruder is controlled in five stages during plasticization, and the temperatures are: 180°C, 190°C, 205°C, 210°C and 205°C; the plasticizing speed of the screw is c...

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Abstract

The invention discloses a waterproof and moisture permeable type thermoplastic polyurethane film and a preparation method thereof. The waterproof and moisture permeable type thermoplastic polyurethane film is prepared from the following components in percentage by weight: 80-85 percent of thermoplastic polyurethane, 8-10 percent of a slipping agent and 7-10 percent of a Matt agent, wherein the thermoplastic polyurethane is prepared from the following raw materials in parts by weight: 58-63 parts of poly(tetramethylene ether glycol), 30-35 parts of toluene diisocyanate, 5-8 parts of 2-ethoxyethyl acetate and 1-3 parts of dibutyl tin diacetate. By virtue of the mode, the waterproof and moisture permeable type thermoplastic polyurethane film is excellent in waterproof and moisture permeable performance, is capable of preventing permeation of water drops and ensuring free penetration of water vapor and can be used in a bad environment.

Description

technical field [0001] The invention relates to the field of films, in particular to a waterproof and moisture-permeable thermoplastic polyurethane film and a preparation method thereof. Background technique [0002] In recent years, special work clothes made of polyvinyl chloride and neoprene used in harsh environments have the advantages of waterproof and imitation of liquid leakage, and are very popular. However, the sweat produced by the human body's own metabolism cannot be excreted in time, which makes people feel uncomfortable such as hot and cold. [0003] At present, with the advancement of technology, the main waterproof and moisture-permeable film materials are: microporous film and hydrophilic film. Among them, the microporous film is a very thin polymer film with a large number of small and connected micropores. In the microporous film, water droplets are bound in the holes and fixed by surface tension; the smaller the holes, The more external force is needed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08G18/48B29C47/92B29C48/92
Inventor 周喜峰周皓黄印
Owner JIANGSU HONGYUAN NEW MATERIAL TECH
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