中文摘要：

使用前期研究中筛选出的能高效降解聚乙烯醇PVA1799的混合菌系，制得PVA降解酶。用该PVA降解酶与淀粉酶复配，对混合上浆棉织物协同退浆。通过考察酶用量、pH值、温度、时间等因素对棉织物退浆效果的影响，得到较优的退浆工艺：C淀粉酶／CPVA酶为1／10，pH值为6．0，温度50℃，时间30min。在此条件下，应用PVA降解酶与淀粉酶协同退浆，棉织物退浆率与碱退浆相当；再结合果胶酶精练后，织物润湿性得以改善，且断裂强度高于碱法前处理。

英文摘要：

A mixed microbial culture with high efficiency of PVA1799 degradation has been screened out in the preliminary study, and PVA-degrading enzymes are prepared on this basis. The PVA-degrading en- zymes are compounded with amylase to improve the desizing rate of mixed pulp sizing fabric. The ef- fects of enzyme dosage, pH value, temperature and time on desizing performance are discussed. The optimal desizing process conditions are the ratio of amylase to PVA-degrading enzyme is 1/10, pH value 6.0, desizing at 50℃ for 30 min. The desizing rate of complex enzyme in optimal conditions can match with alkali desizing. The wettability of fabric is improved after scoured with pectinase. Moreover, the rup- ture strength of cotton fabric is higher than that pretreated by alkali.