蛋白分解酵素による絹・アセテ-トの精練
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概要
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In order to obtain the useful data for the protease scouring of raw silk-acetate fabrics, some fundamental examinations were carried out. The results obtained were as follows:1. Sericin of raw silk or raw silk fabrics (Habutae) was dissolved and removed by the procedure combined the pretreatment, main treatment using a protease solution and after treatment without the destruction of fibroin and saponification of acetate treated in the same bath.2. In case of this procedure, the boiling for 15-20 minutes in water and the boiling for 10 minutes twice in the alkali solution containing 0.1% of soap and 0.025% of sodium carbonate were applied to the pretreatment and after treatment respectively. As the main protease treatment in this procedure, the treatment for 3-5 hours at 50°C in the protease solution of 200-300PU/ml in concentration was applied.3. From the data obtained in the protease scouring of raw silk fabrics (Habutae) and acetate in the same bath, it was considered that the following procedure is effective without the destruction of raw silk fibroin and saponification of acetate used.Pretreatment: Boiling for 15-30 minutes in waterMain treatment: Treatment for 5-7 hours at 50°C in protease solution of 200-300PU/ml in concentrationAfter treatment: Boiling for 10 minutes twice in alkali solution containing 0.1% of saop and 0.025% of sodium carbonate4. To obtain the suitable results in scouring of various kinds of raw silk-acetate fabrics, the control of scouring time seems to be more reasonable than that of concentration of protease solution to use.
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