Method for preparation of waterborne polyurethane impregnated superfine fiber synthetic leather base

Abstract

The invention relates to a method for preparation of a waterborne polyurethane impregnated superfine fiber synthetic leather base. The method includes the steps: coating waterborne polyurethane slurry on release paper, pasting a superfine fiber nonwoven fabric and carrying out infrared heating and hot-air drying; after cooling, carrying out impregnation to obtain the waterborne polyurethane impregnated superfine fiber synthetic leather base. Since only moisture volatilization exists in a production process, environment friendliness is realized; no harmful gas is generated in a production environment, and operators are protected from health hazards; due to the fact that waterborne materials in the waterborne polyurethane impregnated superfine fiber synthetic leather base have hydrophilic groups, excellent moisture permeability is achieved; after alkali deweighting and splitting, the waterborne polyurethane impregnated superfine fiber synthetic leather base is excellent in breathability. Compared with a traditional methylbenzene deweighting process, the alkali deweighting process in production of the waterborne polyurethane impregnated superfine fiber synthetic leather base has the advantage of high sustainability.

Description

technical field [0001] The invention belongs to the field of leather, in particular to a method for preparing an environmentally friendly and sustainable water-based polyurethane impregnated superfine fiber synthetic leather base. Background technique [0002] The composition of solvent-based polyurethane is complex, poor in environmental protection, and will cause certain pollution to the environment; the production process will cause hidden dangers to the health of employees, so the production line must invest a certain amount of equipment costs to prevent air pollution in the workshop, which increases the burden on the enterprise. [0003] Since water-based polyurethane uses water as the dispersion medium, no organic solvent is needed in the processing process, so it has no pollution to the environment and no health hazards to operators. Moreover, water-based polyurethane has low odor and is not easy to burn, and the processing process is safe and reliable. [0004] The w...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing solvent-based polyurethane has complex components and poor environmental protection, which will cause certain pollution to the environment; during the production process, it will cause hidden dangers to the health of employees, so the production line must invest a certain amount of equipment costs to prevent the workshop from Air pollution increases the burden of the enterprise and provides a non-combustible, non-toxic, non-polluting, environmentally friendly and sustainable preparation method for water-based polyurethane impregnated with ultra-fine fiber synthetic leather bass