Preparation method for water-based wet-process microfiber leather

Abstract

The invention provides a preparation method for a water-leatherd wet-process microfiber leather. The preparation method comprises the following steps of preparing non-woven leather cloth; carrying outwater-soluble polyester pre-shrinking treatment on the non-woven leather cloth; carrying out waterborne polyurethane wet-process impregnation treatment; carrying out extruding; carrying out wet-process solidification; carrying out splitting and reduction; and carrying out post-processing. The preparation method has the advantages that the key of the method lies in how to avoid using an organic solvent in the whole producing and manufacturing processes, a water-leatherd wet process is adopted, so that all process materials are environmentally-friendly, and the prepared leather can achieve thestructural characteristics of leatherette; and a figured sea-island short fiber leather material is used, ultrafine fibers with the fineness of 0.05 D can be obtained after sea components are dissolved away, and prepared leather is soft in hand feeling, good in drapability, attractive and good in air permeability, is similar to real leather in strength, folding resistance and other performances, is superior to natural leather in water resistance and anti-mildew and antibacterial performance and is a novel material with vitality in the industry of artificial leather and synthetic leather.

Description

technical field [0001] The invention belongs to the production field of water-based resin used for synthetic leather, and in particular relates to a preparation method of water-based wet-process superfiber bass. Background technique [0002] As the fourth generation of synthetic leather, sea island microfiber leather has completely surpassed genuine leather in terms of physical and chemical properties. At present, it has gradually replaced genuine leather in the fields of footwear, sofa furniture, car interiors, luggage gloves, etc., and its consumption has already accounted for half of the genuine leather. I believe that In the future, as the environmental performance of microfiber leather improves, the amount of microfiber leather will increase. The continuous improvement of people's living standards has led to higher and higher requirements for the quality of life, especially under the strong national energy-saving and emission-reduction policies, higher requirements are ...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic microfiber leather has been produced, but they are all non-environmental protection products. Due to the technical characteristics of ordinary sea island microfiber leather, it cannot solve the environmental protection of the material itself and the environmental protection of the process, especially DMF in leather. Technical problems such as the volatilization of toluene, odor, VOC and other harmful substances have not been solved. The above-mentioned products cannot meet the requirements of green environmental protection, and also cannot meet the environmental protection index requirements of high-end furniture, shoes and leather for automobiles.

In the prior art, polyurethane synthetic leather is a solvent-based product, which has different degrees of solvent environment in the production process, which has a greater impact on the environment.