The invention provides a method for scouring a cotton fabric by applying
cutinase and CBD (
cellulose-
binding domain)-alkaline
pectinase, belonging to the technical field of treatment of cotton fabrics before
dyeing and finishing. The method comprises the following steps of: treating a cotton knitted fabric, cotton yarns, or a cotton
woven fabric from which size is removed by
amylase or
sodium hydroxide firstly, in a mixed
enzyme solution formed by
cutinase and CBD-alkaline
pectinase; or respectively treating in the
cutinase solution and the CBD-
pectinase solution, wherein the hydrophobic
surface structure of cotton fibers is destructed by the cutinase, the higher
fatty acid ester substances are removed from the surface waxy
layers of the cotton fibers, so that the wettability of the cotton fabric is improved, the pectic substances on the cotton fibers are exposed, and then the CBD-pectinase is absorbed on the surface
cellulose of the cotton fibers to decompose the pectic substances on the cotton fibers. By the method provided by the invention, on the one hand, the traditional
chemical treatment method can be substituted for scouring the cotton fabric, and on the other hand, because the cutinase and the CBD-alkaline pectinase are adopted, the wettability of the cotton fibers and the
pectin removal rate are improved.