Abstract:

PVA-degrading enzyme was used in the desizing of cotton fabric to solve the difficult degradation problem of polyvinyl alcohol, which can effectively decompose the PVA on fabrics and greatly reduce the cost of wastewater treatment. The paper mainly studied the nature of PVA-degrading enzyme according to enzyme activity, and applied it to desizing of the cotton sized with polyvinyl alcohol. The results demonstrated the suitable conditions are pH=7-8，T=30℃ and t=3 h. PVA can be degraded by PVA-degrading enzyme. When PVA-degrading enzyme was applied to desizing, the total amount of PVA in the slurry plus residual PVA on cotton should be less than 100%, while it makes little difference in the total amount of PVA when buffer and hot water desizing is adopted.