Cationic Modified Cotton Knitted Fabric Reactive Material Anti-dyeing Process

1. What is Cationic Modified Cotton?

Cationic modified cotton = modified cotton fiber with cationic groups (mainly quaternary ammonium salts) introduced onto or inside the cotton fiber surface. Its purposes include:

• Cotton fibers carry a negative charge under neutral/alkaline conditions (-OH dissociation)

• Ordinary cotton has limited affinity for anionic dyes (reactive dyes)

• Modified fibers carry a positive charge, significantly increasing their affinity for anionic reactive dyes

• Cationization introduces positive charges onto cotton fibers, significantly improving the affinity between cotton and anionic reactive dyes. This can increase dye exhaustion, reduce salt consumption and improve dyeing efficiency.