In polyester () dyeing processes, the stability of disperse dyestuffs under high temperature and the achievement of a spot-free appearance on the fabric surface are the most critical quality parameters. CRN SOFT WG 113 is a powerful colloidal dispersant and anti-redeposition auxiliary specifically developed for disperse dyeing baths.
Colloidal Protection and Dispersion Stability
Since disperse dyestuffs do not dissolve in water, they must remain suspended as microscopic particles throughout the bath. CRN SOFT WG 113:
Colloidal Stability: Forms a protective layer around dyestuff particles, preventing them from coalescing or aggregating at high temperatures ().
Excellent Uniformity: Ensures a homogeneous distribution of the dyestuff within the bath, preventing color fluctuations and dye spotting (specks) on the fabric.
Prevention of Redeposition (Back-Staining)
The product prevents dyestuffs and impurities from re-adhering to the fabric, especially during the dyeing and cooling stages.
Stain Risk Control: Stops suspended impurities and dye molecules prone to clumping from settling onto the fabric surface. This feature is particularly helpful in reducing the white dust-like precipitation of oligomers commonly encountered in polyester dyeing.
Clean Surface: Ensures a cleaner fabric surface post-dyeing, which contributes to achieving higher washing fastness values.
Key Advantages of CRN SOFT WG 113
HT (High Temperature) Resilience: Retains its colloidal structure and protective effect even under the most demanding dyeing conditions.
Broad Application Range: Safely used in the dyeing of all synthetic fibers where disperse dyestuffs are applied, including polyester, acetate, and triacetate.
Low-Foam Profile: Provides operational ease in high-circulation machinery such as jet and overflow systems without causing foam-related issues.
Fastness Improvement: Assists in the orderly placement of dye within the fiber and minimizes free dye on the surface, thereby improving rubbing fastness.