Linear low density polyethylene (LLDPE) is a non-toxic, tasteless and odorless milky white particle with a density of 0.918~0.935g/cm3.It compared with LDPE, longchang petrochemical linear low density polyethylene with high softening temperature and melting temperature, has good strength and toughness, rigidity, heat resistance, cold resistance is good wait for an advantage, but also has good environmental stress cracking resistance, resistance to impact strength, tear strength and other properties, and acid, alkali, organic solvent and widely used in industry, agriculture, medicine, health and daily life supplies, and other fields.

High density polyethylene (HDPE) is a white powder or granular product.Non-toxic, tasteless, crystallinity is 80% ~ 90%, softening point is 125 ~ 135℃, using temperature up to 100℃;Hardness, tensile strength and creep property are better than low density polyethylene.Longchang petrochemical high density polyethylene has good wear resistance, electrical insulation, toughness and cold resistance.Good chemical stability, at room temperature, insoluble in any organic solvents, acid, alkali and various salts corrosion resistance;The film has low permeability to water vapor and air and low water absorption;Aging resistance, environmental stress cracking resistance is not as good as low density polyethylene, especially thermal oxidation will make its performance decline, so the resin must be added antioxidant and uv absorbent to improve the shortage of this aspect.The thermal deformation temperature of hdPE film is low under the condition of stress, so attention should be paid in application.

Also known as high pressure polyethylene (LDPE), is the lightest variety of polyethylene resin, is milky white, tasteless, odorless, non-toxic, glossy waxy surface particles.The low density polyethylene of Longchang petrochemical has good softness, extensibility, electrical insulation, transparency, machinability and certain air permeability.Its chemical stability is good, alkali resistance, resistance to general organic solvents.