Ethylene Propylene Rubber (EPR), whose full name is cross-linked ethylene-propylene rubber, has the stability of oxygen and ozone resistance and partial discharge and has excellent cold resistance, maintaining good flexibility even at -50℃.
Also, it has excellent stability against weathering and light. In particular, it does not contain halogen and has flame retardant properties. The ethylene-propylene rubber insulated cable with chlorosulfonated polyethene sheath is suitable for places requiring flame retardancy.
Epr insulated cable is not yet widely used in China but has long been used in large quantities abroad, especially in Europe. It has excellent electrical and mechanical characteristics and has good high-temperature resistance even in humid environments. Epr insulated cable allowable operating temperature up to 90 ℃, short-circuit thermal stability of the permissible temperature of 250 ℃.
A kind of irradiation-resistant low smoke halogen-free flame retardant ethylene-propylene rubber cable material preparation method, through the input of ethylene-propylene rubber, aluminum hydroxide, silicone flame retardant synergist, lead compounds, antioxidant, anti-copper agent, γ-ray absorber, liquid peroxide vulcanizing agent, and phenolic heat stabilizer into the compacting machine, heating, and mixing, and then through the twin-screw extruder air-cooled made.