What is the effect of fabric softening on printing fastness

What is the effect of fabric softening on printing fastness？

Knitted cotton or rayon is one of the main fabrics for clothing, mainly children's wear, underwear, round neck T-shirts, cultural shirts, etc. Because of marketization and market competitiveness, some brands or businesses, in order to maximize profits, mix chemical fibers or use combed instead of combed to serve as cotton fabrics. In terms of fabrics, in order to imitate the softening effect of all cotton, silicone oil or silicon-containing softeners are generally added in the rinsing process of the grey fabric to achieve multiple effects at one time to improve the appearance and feel of the fabric. However, after years of practice, textiles The comparison between the research institute and the University of Science and Technology found that for this kind of soft-treated fabric, the international big brands and domestic well-known paint binders cannot achieve the expected effect in the fastness of paint printing, especially the fabrics with lower gram weight For example, single-sided jerseys have little penetration and adhesion. The electrons and ions generated by the surface silicon treatment and soft treatment basically repel reactive dyes and coatings, and further reduce the color fastness. After many tests and statistics, Pigment printing on knitted jersey due to the adhesion of the fabric softening treatment, the general color (color paste added below 3%) dry and wet friction is reduced by about 1 level, for dark colors (color paste added above 5%) dry and wet friction is reduced by more than 1.5. The washing fastness basically cannot reach the national B-level standard, so it is recommended to print before the fabric is softened, and then bake it in the soft treatment after printing, and some softeners will cause fluffy damage to the fabric fibers, resulting in the fabric's tear strength reduce. The solution can be a relatively soft printing adhesive. If the fabric has been softened and printed, it can be baked with steam above 130 degrees to accelerate the crosslinking of the adhesive, but pay attention to the pre-shrink calculation of the fabric. In short, the soft modification of the fabric has an unpredictable effect on the fastness of printing (dye, paint). As a fabric supplier, you must notify the printing unit in advance and test the actual adhesion fastness with a small sample to avoid loss.