Shrinkproofing Wool with Synthappret BAP Formulations Containing Urea

Using Milling to Control the Hygral Expansion of Piece-dyed Worsted Fabrics

“…The increase i.n hygral expansion that results from piece-dyeing can be reduced if the setting action of the dyebath is inhibited by dyeing at low pH [3] or by the use of anti-aetting agents I2,3l.…”

Application of Novel Azetidinium Cationic Polyurethane Dispersion Finishing Agent for Wool Fabrics

“…The fabrics, which are composed of wool fibers, would provide good skin affinity and natural glossy and thermal performance. , Consequently, wool fabrics are widely used in high-grade clothing. − However, the disadvantage of wool fabric is obvious. It has a higher tendency to pill, and the fabric shrinkage happens during the washing process, especially with a washing machine. − Polyurethane dispersions (PUDs) have been recognized by International Wool Secretariat (IWS) as finishing agents for wool fabrics. , The most widely used finishing agent on the market is Synthappret BAP (Bayer), which is the typical structure of sodium bisulfite blocked PUDs. , The antishrinkage feature of sodium bisulfite blocked PUDs is effective; however, it produces high-pH sewage or residues such as sodium bisulfite during treatment, resulting in environmental and health threats.…”

“… 11 , 12 The most widely used finishing agent on the market is Synthappret BAP (Bayer), which is the typical structure of sodium bisulfite blocked PUDs. 13 , 14 The antishrinkage feature of sodium bisulfite blocked PUDs is effective; however, it produces high-pH sewage or residues such as sodium bisulfite during treatment, resulting in environmental and health threats.…”