write some properties of silk worm
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It is obtained from it when it is in its pupa stage. The rearing of silk worm for gaining silk is called sericulture. As these small creatures spin their cocoon around them, they are put in hot water to release the thread from them.
Silk has a smooth, soft texture that is not slippery, unlike many synthetic fibers. Silk is one of the strongest natural fibers, but it loses up to 20% of its strength when wet. It has a good moisture regain of 11%. Its elasticity is moderate to poor: if elongated even a small amount, it remains stretched.
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Morphology. Silkworms cocoons have a highly porous non-woven structure with multiple layers parallel to the surface direction.
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