The normal cotton denim will have 2% - 3% horizontal shrinkage, while the elastic denim will have a shrinkage of more than 10%, and the high elastic denim will also have a shrinkage of 15-18%. What is the reason for the shrinkage of elastic denim after washing?

1、 Elements of natural shortening

Natural shortening factors Natural shortening factors Natural shortening refers to the shortening phenomenon of fabric from delivery to use. During the weaving and processing of denim fabric, the fibers are subject to a certain degree of mechanical external force, which causes the fibers, yarns and fabrics to stretch, leaving behind potential strains, as well as the variety of fabric fibers, weaving technology, storage conditions and time, etc., which will cause certain accumulation deformation, affecting the degree of natural shortening of the fabric. The natural shortening of some denim fabrics may also be negative, which brings certain difficulties to the control of denim pattern size.

2、 Elements of heat shrinking

The thermal shrinkage of denim fabric mainly refers to the shortening phenomenon of denim fabric during the production of ironing and ironing. Due to the thermoplasticity of denim fabric fiber and the elements of fabric pullback function, the shortening phenomenon will occur when the temperature is too high during the ironing and ironing process, affecting the tailor's size.

3、 Factors of shortening in case of water

After absorbing water, the denim fabric fiber will have the opposite swelling effect. The bending degree of warp and weft yarn will increase, the fabric will become thicker, and the size will be shortened. This shortening is also called shrinkage. Generally speaking, the better the moisture absorption of the fiber used in the fabric, the greater the shrinkage of the fabric itself, and vice versa. Ordinary denim will have 2% - 3% horizontal shrinkage, while elastic denim will have more than 10% shrinkage.

Clothing made of denim fabric has always been popular with people because of its rudeness, boldness and ease. In order to achieve denim fabric desizing, anti-shrinking, softening, hair removal and tailor's special feel and visual effect, tailor's washing becomes one of the characteristics of denim clothing.

The article is from the manufacturer of elastic jeans:http://www.hsbyfz.com/