Green leather preparation method without heavy metal pollution

Abstract

The invention discloses a green leather preparation method without heavy metal pollution, which includes the following steps: taking the leather and subjecting it to primer, tumbling, intermediate coating, fixed coating and drum processing in sequence to obtain a finished leather product. 1) The primer is : In terms of parts by mass, add 10-15 parts of modified polysiloxane aqueous emulsion and 25-30 parts of anionic polyurethane dispersion to 100-120 parts of deionized water in sequence at room temperature, raise the temperature to 30-40°C, and stir evenly , use a roller coating machine to apply it on the surface of the leather base, bake it at 80-90°C for 20-25 minutes, let it naturally cool down to room temperature, add 5-20 parts of nano photocatalyst and 50-70 parts of modified acrylic resin under normal temperature light. , evenly sprayed on the leather surface, and baked at 70-80°C; the invention provides a green leather preparation method without heavy metal pollution, has less harmful substance emissions, and has better anti-fouling and waterproof properties.

Description

technical field [0001] The invention relates to the field of leather, in particular to a method for preparing green leather without heavy metal pollution. Background technique [0002] The leather industry is a traditional characteristic and advantageous industry in China, a pillar industry in my country's light industry, and an industry that benefits the people, occupying an indispensable position in the national economy. In particular, after more than 30 years of development since the reform and opening up, my country has become a world-recognized world leather production center, trade center and technology center, and has become a world leather power. [0003] Although our country is a big leather country, it is not yet a leather power. In particular, although the environmental pollution of the tanning industry has been improved and reduced to a greater extent, it has not been fundamentally resolved. The outstanding problem is still that pollutants such as lime, sulfide...

AI Technical Summary

Problems solved by technology

In particular, although the environmental pollution of the tanning industry has been improved and reduced to a large extent, it has not been fundamentally resolved.

The outstanding problem is still that pollutants such as lime, sulfide, trivalent chromium, ammonia nitrogen, and chloride ions have not been eliminated, and the problem of high chromium-containing solid waste and wastewater discharge in tanning has not yet been resolved. Resource technology maturity is not high

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