What is the difference between PE and PEI materials

What is the difference between PE and PEI materials ?

PEI (polyetherimide, Polyetherimide) is an amber transparent solid with inherent flame retardancy and low smoke without adding any additives, with an oxygen index of 47%, a combustion rating of UL94-V-0, and a density of 1.28~1.42g/cm3. PEI has strong high temperature stability, and even if it is non-reinforced PEI, it still has good toughness and strength. Therefore, PEI's superior thermal stability can be used to make high-temperature heat-resistant devices. PEI has excellent mechanical properties, electrical insulation properties, irradiation resistance, high and low temperature resistance and wear resistance, and can pass through the microwave.PEI also has good flame retardancy, chemical resistance and electrical insulation properties. PEI also has a very low shrinkage rate and good isotropic mechanical properties. Adding glass fiber, carbon fiber or other fillers can achieve the purpose of reinforcement modification; it can also be used with other engineering plastics to form a heat-resistant polymer alloy, which can be used under the working temperature of -160 ~ 180 ℃ for a long time.

PE (Polyethylene) English name: Polyethylene Specific gravity: 0.94-0.96g/cm3 Molding shrinkage: 1.5-3.6% Molding temperature: 140-220℃ Drying conditions, corrosion resistance, electrical insulation (especially high-frequency insulation) excellent, can be chlorinated, irradiation modified, available glass fiber reinforced. Low pressure polyethylene has high melting point, rigidity, hardness and strength, low water absorption, good electrical properties and radiation resistance; high pressure polyethylene has good flexibility, elongation, impact strength and permeability; ultra-high molecular weight polyethylene has high impact strength, fatigue resistance and wear resistance. Low pressure polyethylene is suitable for making corrosion resistant parts and insulating parts; high pressure polyethylene is suitable for making films, etc.; UHMWPE is suitable for making shock absorbing, wear resistant and transmission parts.