In
general, the combustion is divided into flame burning and flameless
combustion, the former is the formation of fiber pyrolysis of the gas or
volatile liquid combustion, the latter is the residue (carbon)
oxidation. Of course, the combustion of the fiber is related to the product of
its thermal cracking, and the thermal cracking process of the different
fibers is different.The following are the same as the "
Flame retardant test instrument mechanism(1) cover theory: flame retardant at> 500 ℃ in the fiber surface can form a protective layer of the cover, in addition to hinder the supply of O2, but also to prevent the proliferation of combustible gas, so as to achieve flame retardant purposes, such as borax - boric acid The(2) gas theory: First, the flame retardant at the combustion temperature, decomposition of non-combustible gas, the flammable gas concentration can be produced to produce the flame concentration below; the other is the flame retardant in the heating conditions, can be as lively A higher tour group, thereby preventing the free radical reaction from proceeding.(3) thermal theory: First, the flame retardant at high temperatures, such as melting and sublimation, thus preventing the spread of combustion; the other is the rapid cooling of the fiber, so that the fabric can not reach the combustion temperature.(4) catalytic dehydration theory: mainly refers to change the thermal cracking process of fiber. As the flame retardant can make the cellulose molecular chain in the fracture before the rapid and large amount of dehydration, and even some of the role of cross-linking to prevent the formation of L-glucose, so that the flame combustion is suppressed.
The flame retardant effect of the organophosphorus compound is due to its ability to form an ester with the hydroxyl group in the cellulose molecule to prevent the formation of leucose and further dehydrate the cellulose to form an unsaturated double bond to promote cross-linking between the cellulose molecules The formation of carbon, smear-resistant effect is better. Only when the amount of finishing agent increased to 10%, can effectively prevent the flame burning.Tests for Flame Retardancy Testing of Fabrics: Ultimate Oxygen Index Tester, Horizontal Flammability Tester, Thermal Protective Tape Tester, Vertical Flammability tester.
Read more on http://www.qinsun-lab.com/
Flame retardant test instrument mechanism(1) cover theory: flame retardant at> 500 ℃ in the fiber surface can form a protective layer of the cover, in addition to hinder the supply of O2, but also to prevent the proliferation of combustible gas, so as to achieve flame retardant purposes, such as borax - boric acid The(2) gas theory: First, the flame retardant at the combustion temperature, decomposition of non-combustible gas, the flammable gas concentration can be produced to produce the flame concentration below; the other is the flame retardant in the heating conditions, can be as lively A higher tour group, thereby preventing the free radical reaction from proceeding.(3) thermal theory: First, the flame retardant at high temperatures, such as melting and sublimation, thus preventing the spread of combustion; the other is the rapid cooling of the fiber, so that the fabric can not reach the combustion temperature.(4) catalytic dehydration theory: mainly refers to change the thermal cracking process of fiber. As the flame retardant can make the cellulose molecular chain in the fracture before the rapid and large amount of dehydration, and even some of the role of cross-linking to prevent the formation of L-glucose, so that the flame combustion is suppressed.
The flame retardant effect of the organophosphorus compound is due to its ability to form an ester with the hydroxyl group in the cellulose molecule to prevent the formation of leucose and further dehydrate the cellulose to form an unsaturated double bond to promote cross-linking between the cellulose molecules The formation of carbon, smear-resistant effect is better. Only when the amount of finishing agent increased to 10%, can effectively prevent the flame burning.Tests for Flame Retardancy Testing of Fabrics: Ultimate Oxygen Index Tester, Horizontal Flammability Tester, Thermal Protective Tape Tester, Vertical Flammability tester.
Read more on http://www.qinsun-lab.com/
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