Definition of elastic fiber

Elastic fiber has entered all aspects of people's daily life and is an indispensable raw material for textile and clothing in life! Without it, there is no beauty-loving stockings; without it, there are no colorful swimsuits in summer; without it, There is no leggings that highlight the devil’s body. It can be said that elastic fibers have made an indelible contribution to the human body and enjoy the comfort of wearing clothes! The definition of elastic fibers From a textile perspective, the elasticity of elastic fibers and their special molecules
Elastic fiber has entered all aspects of people's daily life and is an essential textile and apparel raw material in life!

Without it, there is no beauty-loving stockings; without it, there is no summer colorful swimsuit; without it, there is no tight pants that highlight the devil's figure... It can be said that elastic fibers show the figure for humans and enjoy wearing clothes Comfort makes an indelible contribution

From the textile point of view, the elasticity of the elastic fiber is related to its special molecular structure, its elongation can reach more than several times, and it can quickly recover after stretching. Generally, elastic fiber refers to a synthetic fiber with a high elongation at break, an elastic recovery capacity close to 100%, and a very low initial modulus.
The earlier national standard GB/T 4146-1984 "Textile Terms and Chemical Fibers" defines elastic fibers as: synthetic fibers with high extensibility and high resilience, which are stretched to three times their original length When you relax again, you can quickly return to the original length.
This definition clearly specifies that the stretch ratio of the elastic fiber is three times the original length. The current national standard GB/T 4146.1-2009 "Textile Chemical Fibers Part 1: Generic Names" does not give a specific definition of elastic fibers, but gives the main characteristics of polyurethane elastic fibers and polyolefin elastic fibers. Described.

The American Society for Testing and Materials (ASTM) defines an elastomer as a material that can be repeatedly stretched to at least twice its original length at room temperature, and can quickly return to its original length after the external force is released. This definition covers a wide range and refers specifically to elastic fibers.

ISO 2076:2013(E): "Textiles-Man-made fibres-Generic names" also does not give the definition of elastic fibers, but gives a description of the different elastic fiber properties.