Low-smoke halogen-free ceramic polyolefin refractory insulation material

Abstract

The invention discloses a low-smoke halogen-free ceramic polyolefin refractory insulation material, which is characterized by comprising the following components by weight: 30-50 parts of metallocenepolyethylene, 30-50 parts of an ethylene-alpha-octene copolymer, 10-20 parts of high density polyethylene resin, 5-10 parts of maleic anhydride grafted amorphous polyolefin, 10-20 parts of pentaerythritol, 6-13 parts of boron carbide, 16-23 parts of silicon carbide, 60-80 parts of nano-aluminum hydroxide, 20-30 parts of brucite, talcum powder, an antioxidant, a silane coupling agent, sodium dodecylbenzene sulfonate, and lubricant silicone masterbatch. The metallocene polyethylene has a tensile strength of greater than or equal to 15MPa and elongation at break of greater than or equal to 500%.The ethylene-alpha-octene copolymer has a melt flow rate of 1-5 g / 10min. The low-smoke halogen-free ceramic polyolefin refractory insulation material provided by the invention can transform into a hard ceramic protective layer after encountering high temperature ignition, and also has certain mechanical strength, thus ensuring the normal operation of wire and cable lines.

Description

technical field [0001] The invention relates to the technical field of halogen-free flame-retardant sheathing materials, in particular to a low-smoke and halogen-free ceramic polyolefin refractory insulating material. Background technique [0002] Ceramic polymer refractory material is a new type of composite material with refractory function made of polymer as the matrix and adding a certain proportion of ceramic powder, flux and other additives. The material has good softness and mechanical properties at normal temperature, and after being fired at high temperature, it will be transformed into a hard ceramic protective layer after being fired at high temperature, and the protective layer has certain mechanical strength. [0003] Although the research on this aspect at home and abroad can be traced back to the 1930s, it has been developing slowly. It was not until recent years that the research on ceramic refractory cables increased, and ceramic refractory cables became one...

AI Technical Summary

Problems solved by technology

At present, ceramic silicone rubber is more researched in ceramic polymer refractory materials, but the disadvantage of ceramic silicone rubber cable material is that when it is used, it needs to be extruded by a special rubber extruder, and it is also It needs to be vulcanized through the vulcanization process, so the process is relatively complicated and the scope of application is limited; if the cable material is made into a silicone rubber tape and wrapped outside the cable core during the wire and cable processing process, the production efficiency is low and the cost is high , not conducive to industrial scale-up production

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