A dry dyeing method for superfine fiber synthetic leather without dyeing waste liquid

Abstract

The invention provides a superfine fiber synthetic leather dry dyeing method free of dyeing wastewater. A microfiber synthetic leather base cloth passes through a first three-edition printing machine; at a first printing position and a second printing position, through transfer effect of a printing roller, a dye emulsion is transferred to both sides of the superfine fiber synthetic leather base cloth; at a third printing position, through the extrusion effect of a printing roller and a supporting roller, the dye fully penetrates, and dries. The microfiber synthetic leather base cloth passes through passes through a second three-edition printing machine; at a first printing position and a second printing position, through transfer effect of a printing roller, a fixing agent is transferred to both sides of the superfine fiber synthetic leather base cloth; and at a third printing position, through the extrusion effect of a printing roller and a supporting roller, the fixing agent full penetrates and dries. The method realizes uniform deep dyeing, and strong surface coloration; the dyed superfine fiber synthetic leather has color wet rubbing fastness reaching more than grade 3.5, dry rub fastness reaching more than 4.0, and dye absorption rate reaching 100%; and the method does not produce any dyeing wastewater.

Description

technical field [0001] The invention relates to the technical field of ultrafine fiber polyurethane synthetic leather, in particular to a dry dyeing method for ultrafine fiber synthetic leather without dyeing waste liquid. 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 microfiber 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,...

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; A method and a combination of the technical advantages of (4) and (5), also reflects the technical defects of (4) and (5)