High-density polyethylene has good heat resistance cold resistance, good chemical stability, high rigidity toughness, good mechanical strength. Dielectric properties environmental stress cracking resistance are also good. Hardness, tensile strength creep are better than low-density polyethylene; abrasion resistance, electrical insulation, toughness cold resistance are all better, but slightly worse than low-density insulation; good chemical stability, at room temperature Under the conditions, it is insoluble in any organic solvents, resistant to corrosion by acids, alkalis various salts; the film has low permeability to water vapor air low water absorption; poor aging resistance, environmental cracking resistance is as good as low-density polyethylene. In particular, thermal oxidation will reduce its performance.
