​Raw Silk

Raw SILK (Silk, cocoon fiber is a thin, fluffy, shiny, flaky fiber; natural textile raw materials formed from the liquid secreted by two silk—separating glands of the silkworm. Silk-consists of two fibers coated with sericin (silk glue) and glued together along the length that surrounds the silkworm. This fiber contains 70-75% fibroin (protein substance), 20-25% sericin, 2-3% of various minerals, 1 — 1.5% of waxes and fats. Depending on the type of silkworm, the length of the cocoon fiber is 400-1500 m, and the indicator characterizing its fineness is the metric number (no.) 2500-3500 or 0.4—0.3 Tex. The fiber obtained from one cocoon is not used in industry due to the fact that it is very thin. At the cocoon factory, the cocoon is boiled, the end of the fiber is found in each cocoon and dried. 5-10 fibers are spun, adding to their length, and raw silk is obtained in the form of yarn. Silk does not come out of the whole boiled cocoon; 10-15% of the cocoon fiber remains with the cocoon.[1]

This is the residual waste of the cocoon. They are also collected and silk is obtained. The elasticity of wet silk fiber is reduced by 10-15%. Silk is considered a good electrical insulation material. Getting silk will require a lot of labor. Therefore, silk is a valuable textile raw material. Silk is used for weaving silk, making braided yarn and for technical purposes, aviation, astronautics, electrical engineering)