Halogen-free plastic composite materials, which are generally for use in sheathing and insulation software for wire and cable, are all provided. The composite materials include a polymeric mix, including ethylene/.alpha. -olefin copolymer and polyolefin, a sterile metal oxide flame-retardant, such as hydrated magnesium oxide, as well as an antimony compound. On occasion, the polymeric mix may include an olefin/unsaturated ester copolymer.

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BACKGROUND

 
Polymer composite materials are used in the wire and cable industry to give insulation and sheathing of electric conductors. Such substances must often meet a complicated variety of electric, mechanical performance and firerequirements, which are based on the specific type of environment in which the substance was made to be utilized.
 

 
In recent decades, the usage of materials comprising a halogen, such as bromine or chlorine, has been limited in many countries. Gases evolved through burning could be corrosive, poisonous, harmful & create thick smoke obscuring escape in firesituations. The potential advantages of halogen-free cables might include decreased ecological and corrosive impact, as well as a possible reduction in smoke and/or poisonous gas generation.
 

 
There’s continuing a necessity to generate polymer composite materials for wire and cable programs which are substantially free of halogen-containing substances while preserving the essential flame retardant and of physical attributes of these cablesheathing materials.
 

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