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Preparation method of waterproof and ventilated PU (Polyurethane) plastic films

A waterproof and breathable, manufacturing method technology, applied in the field of PU plastic film manufacturing, can solve the problems of water penetration, unable to produce breathable properties, unable to achieve waterproof function, etc.

Inactive Publication Date: 2011-01-05
王明正
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PU materials are also used to make products such as films or artificial leather; however, whether it is made of PU polymer particles by hot melt molding, or using PU polymer sol, or finished products made of water-soluble PU polymer dispersion, such as waterproof Membranes, foamed cotton, leather elastomers, fibers, etc. cannot produce breathable properties. If a foaming agent is added to the PU material as a pore-forming agent, the air-permeable pores formed in the PU material will become too large. , so as to cause water penetration, unable to achieve waterproof function

Method used

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  • Preparation method of waterproof and ventilated PU (Polyurethane) plastic films
  • Preparation method of waterproof and ventilated PU (Polyurethane) plastic films
  • Preparation method of waterproof and ventilated PU (Polyurethane) plastic films

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Embodiment Construction

[0020] The waterproof breathable PU plastic film manufacturing method that the present invention provides, it comprises the following steps::

[0021] (a) PU macromolecular polymer is made colloid;

[0022] (b) Mix cationic water-repelling agent and cationic bridging agent with a ratio of 1% to 10% relative to the colloid in the PU colloid and fully stir to become a material to be used;

[0023] (c) making the material to be used into a plastic film with a thickness ≥ 0.01 mm, that is, making the film possess waterproof and breathable properties.

[0024] Such as figure 1 As shown, wherein, in step (a), the PU polymer can be processed into PU particles, and then the PU particles can be melted to above 100° C. to form the PU colloid. can also be as figure 2 As shown, the PU polymer is processed into a PU solvent-based glue, and then added with an alcohol ether solvent to dilute it to form a PU gel. can also be as image 3 As shown, the PU polymer is processed into a PU wa...

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Abstract

The invention relates to a preparation method of waterproof and ventilated PU (Polyurethane) plastic films, which is mainly characterized in that PU high polymers are prepared into colloids; then a cation drying agent and a cation bridging agent of 1% to 10% corresponding to the colloids are mixed and fully stirred with the PU colloids to form standby materials; and finally, the standby materials are prepared into plastic films with the thickness greater than or equal to 0.01mm so that the films have waterproof and ventilated properties.

Description

technical field [0001] The invention relates to a method for manufacturing a waterproof and air-permeable PU plastic film that does not allow water to penetrate but allows air to penetrate. Background technique [0002] Polyurethane resin (poly-urethane, referred to as PU) is one of the polymer materials developed in the past 30 years; PU is a widely used waterproof material, such as used for roof waterproofing. PU materials are also used to make products such as films or artificial leather; however, whether it is made of PU polymer particles by hot melt molding, or using PU polymer sol, or finished products made of water-soluble PU polymer dispersion, such as waterproof Membranes, foamed cotton, leather elastomers, fibers, etc. cannot produce breathable properties. If a foaming agent is added to the PU material as a pore-forming agent, the air-permeable pores formed in the PU material will become too large. , so as to cause water penetration, unable to achieve waterproof f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L75/04
Inventor 王明正
Owner 王明正
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