• Setas invented a new technology to eliminate the PA6 fiber treatment process in dye houses to eliminate phenolic yellowing of white socks during storage.


PA6 Fiber manufacturers produce PA6 fibers. PA6 fibers are sent to dye houses for surface acidic treatment to eliminate phenolic yellowing and for optically whitening. Sock manufacturers produce socks using these treated fibers.


During the manufacturing of PA6 fibers, Masterset Antiphenolic yellowing additive containing optical whitener masterbatch is added as masterbatch form. Sock Manufacturers directly use this fiber. Dye houses are eliminated in between. 50 L water/kg fiber is saved.




Fibers After Phenolic Yellowing Test

(ISO 105-X 18:2007)