Production method of microfiber waterproof breathable synthetic leather

Abstract

The invention discloses a production method of microfiber waterproof breathable synthetic leather, and belongs to the field of superfine fiber base materials. A resin layer is attached to a non-woven fabric bottom blank, the resin layer contains a breathable auxiliary agent, and the breathable auxiliary agent is a compound of modified polysiloxane and a surfactant. The production method of the microfiber waterproof breathable synthetic leather has the beneficial effects that the modified polysiloxane and the surfactant are added into the resin used in the dry-method veneering process to serve as the breathable auxiliary agent, the breathable auxiliary agent can be uniformly distributed on the surface of the resin but are not dissolved in the resin in the stirring process, a fine micropore structure is formed, then the structure is fixed through heat treatment in the dry-method production process, and finally, a reticular microporous structure is formed. The diameters of the micropores are 0.2-10 microns, the porosity is more than 80%, the diameters of the micropores are 1 / 5000-1 / 20000 of the diameters of water drops and about 700 times of the diameters of water vapor molecules, so that the water drops can be prevented from passing through, the water vapor molecules can freely pass through, and sweat vapor is discharged to the outside by utilizing the temperature difference between the temperature in the clothing and the external environment temperature and the humidity difference.

Description

Technical field [0001] The present invention relates to the field of ultra-fine fiber substrate, in particular, to a method for producing microfiber waterproof breathable synthetic leather. Background technique [0002] Microfiber microfiber abbreviation PU synthetic leather, microfiber staple was carded by needling a nonwoven fabric made of three-dimensional structure, and then after wet processing, PU resin impregnation, the final base reduction and other processes made of superfine fiber leather. PU PU microfiber was added in, and the toughness and permeability, abrasion resistance has been further strengthened; because extremely excellent wear resistance, excellent cold-resistant, breathable, aging resistance and widely used in the shoe. But ultra-fiber product after the dry veneer, the overall air permeability decreased more, if not by a dry process, the surface texture of products microfiber style, and color change of the water there is a certain lack of water resistance. ...

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