The purpose and process principle of soaping
classification： Industry Knowledge
The purpose of soaping
Reactive dyes have complete chromatograms, bright color, low cost and mature dyeing process. Therefore, more than 80% of cellulose fibers are dyed and printed with reactive dyes. There are many kinds of reactive dyes, various chemical structures, and different reaction efficiencies, but they can not completely react with cellulose fibers. In addition, while dyeing and fixing fibers, dyes also undergo hydrolysis, that is, active dyes. The group is substituted with a hydroxyl group to form a hydrolyzed dye.
These unfixed dyes and hydrolyzed dyes have very similar diffusion and adsorption properties to the original reactive dyes, so they are easily adsorbed on the surface of the fibers and diffuse into the fibers. In the case of alkaline agents and temperature pressure, these unfixed dyes and hydrolyzed dyes (floating colors) are partially combined with fibers, which easily lead to bleeding and re-staining, wet rubbing fastness, dry rubbing fastness, and washing fastness. Fastness and anti-staining performance are not ideal. The main purpose of soaping is to remove the floating color and improve the quality of the product.
Soap washing process principle
Solubilization: Increases the solubility of the auxiliaries remaining on the fabric and the unbound dye.
Chelation: Chelation with high-valent metal ions to soften the wash water.
Dispersion: It has anti-agglomeration and dispersion effect on solid dirt.
Net wash: Wash the auxiliaries and unbound dye remaining on the fabric.
Emulsification and anti-staining effect: The cleaned auxiliaries and dyes are uniformly emulsified in the solution to form micelles to prevent further staining onto the fabric.
Alkaline buffering effect: instead of using alkaline substances such as soda ash in general cleaning.
PMA-40 is a dispersed soaping agent monomer product of a monomer component of a horse-propylene copolymer. It is suitable for soaping and anti-sticking of cotton fiber and its blended fabric. This product is a polymer compound with excellent chelation and dye-adhesive properties, and has a good dispersion effect. It can improve the stability of the dye in the dyebath during dyeing, and can also be used as a soap after dyeing. The agent has a good anti-floating effect and outstanding anti-sticking performance. This product does not contain banned substances such as APEO and meets environmental protection requirements.
1. Excellent soaping and anti-staining ability
2. Excellent chelation and dye adsorption properties
3. Has a good dispersion effect