RAINBOW:A NOVEL VISCOSE FIBER FOR PES BLENDS INNOVATIONS IN DYEING TECHNOLOGY

摘要

Blends of Viscose and PES are widely used in the textile industry,but the traditional dyeing process is complex as a two-step procedure is required.Using the Rainbow fiber,the fabric can be dyed in a single step at low pH without addition of salt requiring only one rinsing step and achieving a very high degree of dye bath exhaustion.Thus,dyeing time is reduced by 50-65% giving the dyehouse manager the opportunity to double or triple productivity.An additional benefit is the reduced consumption of energy,(waste)water and salt.This unique combination of properties has been realized by incorporation of a cationic polymer into the viscose spinning dope,thus achieving permanent modification.Suitable dyeing procedures have been developed in cooperation with DyStar.By an appropriate selection of DyStar direct or metal complex dyes,a light fastness similar to conventional viscose has been achieved while all other fastness properties remain equivalent to viscose fibers.