High-air permeability high-moisture emission superfine fiber synthetic leather and preparation method thereof

Abstract

The invention discloses high-air permeability high-moisture emission superfine fiber synthetic leather and a preparation method thereof. The preparation method comprises the following steps: by takingsuperfine fiber non-woven cloth of a three-dimensional interwoven structure as a base material, combining cellulose with a superfine fiber by using a dipping and curing combination technique so as toobtain high-air permeability high-moisture emission composite base cloth, and carrying out a common aftertreatment process of superfine fiber synthetic leather, thereby obtaining the high-air permeability high-moisture emission superfine fiber synthetic leather. The high-air permeability high-moisture emission superfine fiber synthetic leather has very good sanitation properties and anti-electrostatic properties, has air permeability greater than or equal to 10000(mL / cm<2>*h), has moisture permeability greater than or equal to 2.0(mg / cm<2>*h), is free of substances of very high concern (SVHC)of the European Union, has an atomization value less than or equal to 5mg (DIN75-201B), is an environmental-friendly superfine fiber synthetic leather, and can be used as an automobile trim material,a chair skin material, a high-end sports shoe material, and the like.

Description

【Technical field】 [0001] The invention relates to the technical field of superfine fiber synthetic leather, in particular to a highly air-permeable and high-humidity-discharging superfine fiber synthetic leather and a preparation method thereof. 【Background technique】 [0002] The raw hides used to produce natural leather are limited, and the production of natural leather is a process of high energy consumption and high pollution, which will bring great pollution load to the environment. In recent years, developed countries such as the European Union have also proposed new standards for the safety of natural leather itself, strictly restricting the presence of toxic chemicals such as Cr(VI), azo dyes, pentachlorophenol (PCP) and free formaldehyde in natural leather. . From the perspective of raw leather resources, environmental protection, product safety and market, the production of natural leather is facing great challenges. [0003] For the above reasons, countries all ...

AI Technical Summary

Problems solved by technology

[0004] However, the production of microfiber synthetic leather still adopts a solvent-based production system, which has the following main problems: First, in the production of microfiber synthetic leather, the combination of superfine fiber and PU adopts a wet coagulation process, To use a large amount of dimethylformamide (DMF) solvent, a large amount of waste water containing DMF will be produced, and the residual DMF in the finished product will also cause product safety problems

However, since the current synthetic leather still uses a solvent-based production system, it will not only cause serious solvent pollution problems, damage the health of industrial workers, restrict products from entering the high-end product market at home and abroad, but also easily cause product safety problems caused by solvent residues.