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A fire retardant is a substance that is used to slow down or stop the spread of fire or reduce its intensity. This is commonly accomplished by chemical reactions that reduce the flammability of fuels or delay their combustion. [1] [2] Fire retardants may also cool the fuel through physical action or endothermic chemical reactions.
Typically, their undergarments beneath the heavier fire-resistant gear are made of flame-retardant cotton or another breathable, organic fabric that has been treated to resist ignition. [ 20 ] Polymers containing nitrogen , sodium , and phosphorus atoms can work as materials for fire-resistant cellulosic textiles, such as cotton or rayon .
Fire-retardant materials should not be confused with fire-resistant materials. A fire resistant material is one which is designed to resist burning and withstand heat. An example of a fire-resistant material is one which is used in bunker gear worn by firefighters to protect them from the flames of a burning building.
A DC-10 dumps fire retardant on Mandeville Canyon Road on Jan 11, 2025, during a battle to save the homes in the Brentwood community from the Palisades Fire that started on Jan. 7.
The term fire-retardant as applied to organic (i.e., containing carbon) materials, is intended to refer to reduced fire hazard, as all will burn under certain circumstances. The tests used specified in building codes , such as NFPA 701, are more correctly flame resistance tests, which test a fabric's ability to resist ignition with the flame ...
The flame retardant is a product called Phos-Chek, which is sold by a company called Perimeter. It has been used to fight blazes in the US since 1963, and is the main long-term fire retardant used ...
From lowest (Least flame-retardant) to highest (Most flame-retardant): HB: slow burning on a horizontal specimen; burning rate < 76 mm/min for thickness < 3 mm or burning stops before 100 mm; V-2: burning stops within 30 seconds on a vertical specimen; drips of flaming particles are allowed.
Overviews of the main flame retardants families, their mode of action and applications are given in. [15] [16] Further handbooks on these topics are [17] [18] A good example for a very efficient phosphorus-based flame retardant system acting in the gas and condensed phases is aluminium diethyl phosphinate in conjunction with synergists such as ...