A kind of superfine fiber synthetic leather special dye and preparation method thereof

Abstract

The invention relates to a special dye for superfine fiber synthetic leather and a preparation method thereof. The invention adopts multi-component blending modification technology to prepare a special dye for superfine fiber synthetic leather, which is used for dyeing superfine fiber / polyurethane synthetic leather. The preparation method is as follows: in parts by weight, first mix 20-50 parts of weak acid dye, 30-70 parts of metal complex dye, 3-15 parts of dispersant, and 2-6 parts of pH regulator, and then pass through the grinder It can be ground into a powder larger than 600 mesh. This type of dye is used for dyeing microfiber synthetic leather, which can balance the coloring amount between superfine fiber and polyurethane components, and can automatically adjust the pH value required for dyeing during the dyeing process. The dyeing process is simple and uniform , The wet rubbing fastness of the dyed superfine fiber synthetic leather color can reach more than 3 grades, and the dry rubbing fastness can reach more than 4 grades.

Description

technical field [0001] The invention relates to a preparation method of a special dye for superfine fiber synthetic leather. Background technique [0002] Natural leather resources are limited, and the production process will produce relatively large pollution. The development of artificial synthetic leather with excellent performance has become the pursuit of human beings. Among them, the superfine fiber non-woven fabric with three-dimensional network structure is used as the reinforcing material, and the superfine fiber synthetic leather obtained by impregnating polyurethane is close to the microstructure in terms of internal microstructure, appearance texture, physical properties and people's wearing comfort. Made of natural leather. According to statistics, as of 2012, the annual production capacity of China's superfine fiber synthetic leather is about 95 million square meters, and the actual annual output is about 75 million square meters. More than 90% of the world's...

AI Technical Summary

Problems solved by technology

However, the components of microfiber nonwovens need to be dyed in the later stage, and the coloring in the early stage will limit the product development in the later stage, and the product variety is single, which is difficult to meet the market requirements; This method combines the technical advantages of (4) and (5), but also reflects the technical defects of (4) and (5)