Degumming method of silk

Abstract

The invention discloses a degumming method of silk, which belongs to the technical field of silk. The degumming method comprises the following steps of preparing the silk, tying the silk with polyester threads, putting the silk in a Na2CO3 solution with certain concentration, heating, boiling, adjusting the pH value of the solution to 9-11, and applying ultrasonic waves to the solution; and washing with deionized water, removing sericin, and drying the degummed silk. The degumming method disclosed by the invention has the advantages that by changing the degumming condition and applying the ultrasonic waves, the breaking strength loss and the breaking elongation of the degummed silk are reduced, and the physical and mechanical strength of the degummed silk is effectively improved; the time is short, the cost is low and the degumming efficiency is high.

Description

Technical field: [0001] The invention relates to the technical field of silk, in particular to a silk degumming method. Background technique: [0002] Silk is a continuous long fiber formed by cocooning and cocooning. It is also called "natural silk". Like wool, it is one of the earliest animal fibers used by humans. It has been known as the "fiber queen" since ancient times. It is precisely Silk has a unique structure and amino acid composition. Silk fiber exhibits elegant luster, comfortable feel, and good moisture absorption, moisture release and moisturizing functions, making it popular as a textile material for a long time. [0003] Silk is composed of two monofilaments. Each monofilament is composed of silk fibroin and sericin. Sericin has a protective effect on silk fibroin. It is an important process in silk printing and dyeing processing. The quality of degumming directly affects the subsequent finishing, thus affecting its wearing performance. [0004] At present...

AI Technical Summary

Problems solved by technology

Acid degumming is not easy to control, and the PH value is too high or too low to damage the fiber, but the PH value is not easy to adjust, and the oil and impurities cannot be removed during degumming, and the cost is high. In addition, the color of silk after degumming is not ideal, and it is easy to produce volatile , irritating gas, easy to damage the skin; as a traditional method of silk degumming, soap base degumming mainly makes sericin swollen and then removed. The silk fiber obtained after soap base degumming is soft, elastic and shiny. However, the degumming time is long, so it is not suitable for open-width degumming. The white fabric after cutting and degumming is easy to yellow. In soap alkali degumming, soap is easy to form saponified products from calcium and magnesium ions in hard water and adhere to the fiber, thus affecting the fiber quality and the later stage. Processing; due to the amphoteric nature of sericin and the alkaline nature of sericin protein, sericin absorbs alkali in alkaline solution, expands and dissolves, and plays a role in hydrolysis to become soluble amino acid salt. At the same time, alkali can also Saponify and neutralize the oil on the fiber into fatty acid, therefore, degumming with alkali can degumming and remove oil