Water-based dry-bonded split leather transfer-film leather and preparation method thereof

Abstract

The invention provides water-based dry-sticking split leather transfer-film leather and a preparation method thereof.The preparation method comprises the steps that auxiliaries such as a water-based wetting agent, a curing agent and a thickening agent are added into water-based polyurethane resin, a surface material, an intermediate material and a dry-sticking sticking material of the water-based polyurethane resin are prepared through stirring, a surface layer is firstly scraped on release paper through a dry-method transfer-film technology, then the surface layer is scraped on the release paper through a dry-method transfer-film technology, and the dry-sticking sticking material is scraped on the release paper through a dry-method transfer-film technology; the water-based dry-sticking split leather transfer-film leather is prepared by the following steps of: drying the release paper, scraping a middle layer after drying, scraping a dry-sticking sticking layer after drying, drying to be transparent at high temperature, sticking with split leather under the pressure of 3-5kg, attaching a PET (Polyethylene Terephthalate) film, rolling, curing in a greenhouse, and stripping the release paper and the PET film, thereby obtaining the water-based dry-sticking split leather transfer-film leather. The obtained water-based dry-sticking split leather transfer-film leather can be applied to the field of sneaker leather, is high in peel strength, resistant to bending at normal and low temperatures and resistant to jungle hydrolysis, can improve the additional value of split leather, is comparable to first-layer leather, can effectively and uniformly permeate a dry-sticking layer according to the compaction degrees of different leather blanks, guarantees stable peel strength, and has a good application prospect. The method is suitable for large-scale mass production.

Description

technical field [0001] The invention relates to the technical field of leather, and specifically discloses a water-based dry-applied two-layer transfer film leather and a preparation method thereof. Background technique [0002] Natural leather such as cowhide is relatively thick. In order to improve the utilization rate of leather in the process of tanning, it is usually divided into two or three layers. The top layer of leather is used to make high-grade genuine leather after surface coating. The second layer of leather has no surface texture layer. Generally, the second layer of leather is made into suede by sanding and dyeing, which is a lower-grade product. At present, the production principle of polyurethane (PU) artificial leather is mostly used in the production of split leather. The solvent-based PU film adds a layer of PU to the surface of the split leather according to the production method of transfer, so that it has the hygroscopicity of genuine leather. Dimens...

AI Technical Summary

Problems solved by technology

[0003] However, the use of solvent-based polyurethane resin, which contains dimethylformamide (DMF), butanone (MEK), toluene (Toluene), etc., although there is a solvent recovery device, is not ideal, resulting in waste of data and environmental pollution. , tens of thousands of tons of exhaust gas drift freely in the air, scattered in rivers, lakes and seas, it is self-evident to environmental pollution, especially in summer, the pollution of tanning and resin factories is serious, no matter it is for tanning workers It is very harmful to the human body and the surrounding environment

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