How to flame retardant rubber joints

Rubber joints burn in special environments, so flame retardant rubber joints are very important. What is flame retardant rubber joint?
Flame-retardant rubber joints are rubber joints that can retard fire, reduce the speed of flame, and separate the spontaneous flame after external flame. Flame retardation includes many aspects.
① Non-ignition, where the material charred and did not catch fire and burn.
② resistance to extended combustion, the material catches fire and burns, but it is difficult to expand.
③Self-extinguishing, the flame is extinguished naturally.
④Short residual time of flameless combustion.
⑤No dripping when burning.
How to improve the flame retardancy of rubber joints?
One is to hinder the combustible gases produced by high temperature differentiation of rubber joints, such as intervention halogen compounds to isolate heat sources and oxygen.
The second is to reduce the system temperature as much as possible to receive heat. Rubber joints have different degrees of flammability. Halogen-containing rubber, such as neoprene, fluoroelastomer, silicone seals, etc., has an unavoidable flame retardancy. Therefore, chlorine-atom-containing neoprene and chlorosulfonated polyethylene are difficult to burn after removing the external flame.