Flame-retarding Agent

Name:
Flame-retarding Agent
Detailed information:
A substance applied to or incorporated in a combustible material to reduce or eliminate its tendency to ignite when exposed to a low-energy flame such as a match or cigarette. There are three methods of application: (1) as a coating or surface finish (nondurable, readily removed); (2) in solution form to penetrate the fibers (semidurable, reasonably stable); and (3) as an integral part of the polymer structure of a synthetic fiber (durable, not removable). The latter method provides permanent protection because it not only makes the material self-extinguishing but cannot be leached out by laundering or dry cleaning. Substances commonly used in methods (1) and (2) include such inorganic salts as ammonium sulfamate, zinc borate, and antimony oxychloride; chlorinated organic compounds such as chlorendic anhydride; alumina trihydrate: and certain organic phosphates and phosphonates. Method (3) is exemplified by a polyester fiber, TM “Trevira 271,” composed of polyethylene terephthalate and an undisclosed flame-retardant chemically linked to the polymer molecule. A copolymer of styrene and phosphazene has also been researched. Certain types of fibers (polyamides and aramids) are inherently flame-retardant, e.g., nylon, “Nomex,” “Kevlar.”

Use:

Carpets, rugs, upholstery, plastics used in construction and miscellaneous wearing apparel.