Method for increasing wet rubbing fastness of etched or sanded dark fabric

Abstract

The invention relates to a method for increasing wet rubbing fastness of an etched or sanded dark fabric. The method comprises steps as follows: a finishing liquid is prepared and then heated to 30 DEG C, the etched or sanded dark fabric is added, the bath ratio is 1:(7-10), vibration heat-insulation finishing is performed for 20-30 min, and drying and baking are performed. The method is simple and convenient to operate, equipment is not required to be added, and the cost is controllable.

Description

technical field [0001] The invention belongs to the field of finishing methods for etched or sanded fabrics, in particular to a method for improving the wet rubbing fastness of etched or sanded dark fabrics. Background technique [0002] In recent years, with my country's accession to the WTO, the quality requirements of textiles are in line with international standards, and the requirements for the color fastness of dyed fabrics are increasing day by day. Among them, the wet rubbing fastness of knitted fabrics, especially napped and brushed reactive dyed fabrics, especially dark-colored fabrics, has always been concerned. Generally, AATCC, ISO and GB stipulate that the wet rubbing fastness of dyed fabrics is qualified at grade 2-3, but at present, foreign customers often require wet rubbing fastness to reach grade 3 or even 3-4. The actual situation is that domestic factories dye fabrics It can only reach level 2-3 or even less than level 2. Therefore, how to improve the ...

AI Technical Summary

Problems solved by technology

[0009] (4) Fiber damage: Fiber damage is mainly divided into two types, one is visible damage, and the degree of this mechanical damage is generally measured by the short-lint rate. The amount of floating fibers increases, destroying the yarn structure, affecting the dryness and strength of the yarn, resulting in a decrease in the wet rubbing fastness

The study found that the floating dye on the fiber is mainly distributed on the surface of the fiber through the following three states: (a) Smaller dye molecular aggregates are distributed on the fiber, and its fixation force is low, which can be used in soaping and washing processes. (b) Larger aggregates of dye molecules are fixed on the fibers and are not easy to remove under normal washing conditions, but dyed fabrics will cause transfer and staining after being subjected to friction, which is the main cause of low rubbing fastness Factors; (c) Dye aggregates on the surface of the fiber to form crystals, and these dye crystals are transferred to the test white cloth due to the high friction when they are rubbed, which is also an important reason for reducing the wet rubbing fastness of dyed fabrics

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