Flame retardant principle of flame retardant fabric
1. burning phenomenon of flame retardant fabric
(1) Flame retardant fabrics can be divided into flaming combustion and flameless combustion, the former is flame retardant fabric fiber pyrolysis gas or volatile liquid combustion, the latter is flame retardant fabric combustion residue oxidation.
(2) The combustion of flame retardant fabrics is related to the pyrolysis products, and the pyrolysis process of different flame retardant fabrics is different.
2. flame retardant fabric flame retardant principle
(1) Covering theory of flame retardant fabrics: flame retardant can form an insulating coating on the surface of flame retardant fabrics when the temperature is more than 500 degrees Celsius, which not only hinders the supply of O2, but also prevents the outward diffusion of combustible gases, so as to achieve flame retardant purposes.
(2) Gas theory of flame retardant fabrics: first, the flame retardant fabrics decompose non-combustible gases at combustion temperature, diluting the concentration of combustible gases below the concentration of flame; second, the flame retardant fabrics can be used as a more active free radical transfer agent under heating conditions, thus preventing the free radical reaction.
(3) Thermal theory of flame retardant fabrics: first, flame-retardant fabrics in high temperature endothermic changes, such as melting and sublimation, so as to prevent the spread of combustion; the other is flame retardant fabrics quickly heat dissipation, so that the fabric can not reach the combustion temperature.
(4) catalytic dehydration of flame retardant fabrics: mainly refers to changing the thermal cracking process of flame retardant fabrics. The flame retardant can make the cellulose molecular chain of the flame retardant fabric dehydrate rapidly and a lot before breaking, and even produce some cross-linking effect, which can prevent the formation of L-glucose and inhibit the flame burning.
The flame retardant fabrics produced by Xinxiang Yulong Textile Co., Ltd. have bright surface, smooth and comfortable feel, compact shape, good dimensional stability, not easy shrinkage, good washing resistance, non-toxic and odourless, safe and reliable for human body, breathable and moisture permeable, soft feel, comfortable wearing. Flame retardant fabric is suitable for making flame retardant protective clothing in metallurgy, machinery, forestry, fire protection and other industries.