It is understood that polyolefin elastomer (POE) is white granular. It is a high-performance polyolefin that becomes rubber elastic at room temperature. It has low density and It has the characteristics of narrow molecular weight distribution, large bending, high low-temperature impact resistance, easy processing, low glass catalytic temperature, and reusability. These characteristics make it well tolerant to inorganic fillers, and has good resilience and flexibility. Its hardness is very low, and it is widely used in the field of modified plastics.
Application and advantages of polyolefin elastomer (POE) in the production of wires and cables:
Since PVC is of high quality and low price, cable sheathing materials Most are produced with PVC, but its thermal stability is poor and easy to degrade, so heat stabilizers must be added. Such additives are generally heavy metal salts containing lead and cadmium. Such cable materials will produce toxic substances after burning. Considering environmental protection and fire reasons, countries around the world are actively developing low-smoke halogen-free retardant fuels. At present, most halogen-free materials in the research and development have the problem that strength, elongation and flame retardancy cannot achieve the optimal balance. This problem can be solved well by using the characteristics of elastomers to replace LLDPE.
POE elastomer is essentially branched polyethylene, which is similar to EVA, EEA, EBA, etc. There are no unsaturated double bonds in the molecular structure of polyolefin elastomer POE, and it has a very narrow molecular weight distribution and short branched structure (short chain branches are evenly distributed), so it has excellent physical and mechanical properties such as high elasticity, high strength, and high elongation. performance and excellent low temperature resistance. The narrow molecular weight distribution makes the material less likely to deflect during injection and extrusion processing, so POE materials have excellent processing properties. Due to the saturated structure of the POE macromolecular chain, the molecular structure contains relatively few tertiary carbon atoms, so it has excellent heat aging resistance and ultraviolet resistance. POE can replace EVA, EEA or EPDM for the insulation of non-PVC cable sheathing materials; in addition, POE’s low change rate in hardness and strength can replace EVA or be used together with EVA to produce halogen-free flame retardant cable materials.
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