A synergistic desizing process of cutinase-amylase for sizing polyester fabric with starch-wpet mixed size

By synergistically combining keratinase and amylase in the same bath, the problem of desizing starch and WPET mixed sizing agents was solved, achieving a high-efficiency desizing effect with low energy consumption and low pollution, while maintaining fabric performance and hand feel.

CN122215202APending Publication Date: 2026-06-16SHAZHOU PROFESSIONAL INST OF TECH
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Patent Information

Application Number
CN202610488840.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-14
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing desizing technologies are unable to efficiently remove starch and WPET mixed sizing agents in a single treatment bath, resulting in decreased fabric performance and high wastewater pollution load. Traditional high-temperature strong alkali methods are energy-intensive and complex.

Method used

The synergistic action of keratinase and amylase in the same working solution degrades starch and WPET components under neutral and medium temperature conditions, avoiding damage to fibers caused by high temperature and high alkali, and promoting the dispersion of degradation products by nonionic surfactants.

Benefits of technology

It achieves efficient one-step removal of mixed sizing agents, simplifies the process, reduces energy consumption, reduces wastewater pollution, maintains fabric performance and hand feel, and is suitable for pure polyester and blended fabrics.

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Abstract

The application discloses a cutinase-amylase synergistic desizing process for sizing polyester fabric with starch and WPET mixed sizing material, and aims at the shortage of the traditional high-temperature strong-alkali desizing process, so that the sized polyester fabric is placed in the same desizing working solution, the synergistic effect of the cutinase and the amylase is utilized under the near-neutral and medium-temperature conditions, and the synchronous and efficient removal of the starch and the WPET mixed sizing material is completed in one step. The method has a simple process flow, can effectively remove the mixed sizing material, can significantly reduce the damage to the polyester fiber, can improve the fabric hand feeling, and has the outstanding environmental protection advantages of low energy consumption and small wastewater pollution load.
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