Why is cotton textiles shrinking?
Clothes in the process of being subjected to stretching will be elongated, and then fixed by the heat after the stereotypes, so when you wash the internal stress relaxation will return to the original size, it will shrink
At the same time, when the fabric is wetted, the water molecules enter the interior of the cotton fiber and the fibers are puffed, and the fabric shrinks when the weft (or warp) of the fabric becomes thicker. This is the cotton fabric soaked in water, there will be "shrink" the cause of the phenomenon.
In the immersion of water, the water will make the fiber molecules between the contact gradually weakened, the fiber surface friction decreased, so that the temporary "stable" state is destroyed, the fiber will be restored or close to the original balance
Cotton fabric in the textile dyeing and finishing process, the fiber to be a certain external force to be stretched, to be finishing, this stretch will be temporarily in the "stable" state
The composition of the fabric is fiber, so the fiber will be irreversible after washing wet anisotropy up, resulting in smaller fiber size.
