Thermoplastic low-smoke halogen-free flame-resistant polyolefin oxygen barrier filling material

Abstract

The invention relates to an oxygen separation layer filler of thermoplastic property, low smoke, no halogen and flame retardant polyolefin. The filler comprises the following components (by weight): 100 of polyolefin resin, 100 to 300 of flame retardant agent, 0 to 100 of flame retardant synergist, 0.5 to 5.0 of antioxidant, 1 to 10 of surface treatment agent, 0 to 20 of lubricant and 0 to 20 of other promoters. Compared with the prior art, the invention has the advantages of having optimal flame retardant performance, off-fire self-extinguish performance and no trickling after burning, being completely stuck on cable, forming a layer of hard carbon shell to isolate oxygen and heat, preventing burning and protecting the cable completely, etc.

Description

technical field [0001] The invention relates to a filler for wires and cables, in particular to a thermoplastic low-smoke halogen-free flame-retardant polyolefin oxygen barrier filler. Background technique [0002] Thermoplastic low-smoke halogen-free flame-retardant polyolefin oxygen barrier filler is a highly filled and highly flame-retardant material, which can form a hard carbon shell on the cable when it burns, and this carbon shell can isolate oxygen And heat, play a role in preventing burning, so as to completely protect the internal structure of the cable, and finally make the cable reach a high flame retardant level, meeting its use requirements. This material is used for the inner sheath of power cables etc. to play the role of structural flame retardancy. [0003] The quality of the material directly affects whether the flame retardant level of the cable can meet the requirements. Because the cable needs to be protected, the material is not only required to have ...

AI Technical Summary

Problems solved by technology

[0003] The quality of the material directly affects whether the flame retardant level of the cable can meet the requirements. Because the cable needs to be protected, the material is not only required to have extremely high flame retardancy, self-extinguishing property when it is away from fire, and droplet resistance, etc. The key is to form a hard carbon layer after combustion and keep the shape of the carbon shell intact, so it is extremely technically difficult

Existing materials mainly have a large amount of dripping phenomenon during combustion, which will continuously generate new interfaces during combustion and cannot self-extinguish, let alone form a complete carbon shell shape, which eventually leads to the combustion of the insulating material inside the cable and cannot pass through. Extremely harsh bunching burning test