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What are the properties of silk

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What are the properties of silk

    • Posted by Aditi Tomar 5 years, 7 months ago

    CBSE > Class 07 > Science
    • 1 answers

    Yogita Ingle 5 years, 7 months ago

    • Composition: The silk fibre is chiefly composed of 80% of fibroin, which is protein in nature and 20% of sericin, which is otherwise called as silk gum.
    • Strength: Silk as a fibre, has good tensile strength, which allows it to withstand great pulling pressure. Silk is the strongest natural fibre and has moderate abrasion resistance. The strength of the thrown yarns is mainly due to the continuous length of the fibre. Spun silk yarn though strong is weaker than thrown silk filament yarns.
    • Elasticity: Silk fibre is an elastic fibre and may be stretched from 1/7 to 1/5 of its original length before breaking. It tends to return to its original size but gradually loses little of its elasticity. This would mean that the fabric would be less sagging and less binding resulting in the wearers comfort.
    • Resilience: Silk fabrics retain their shape and have moderate resistance to wrinkling. Fabrics that are made from short – staple spun silk have less resilience.
    • Drapability: Silk has a liability and suppleness that, aided by its elasticity and resilience, gives it excellent drapability.

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