a. High Density polyethylene (HDPE)
Properties: HDPE commonly known as hard soft glue, natural color, cylindrical or oblate particles, insoluble in general solvent at room temperature, but in aliphatic hydrocarbon, aromatic hydrocarbon and halogenated hydrocarbon for a long time in contact with swelling, at 70ºC above slightly soluble in t oluene, acetic acid. Heating in the air and oxidation under the influence of sunlight. Resistant to most acid and base erosion. Low water absorption, can remain soft at low temperature, high electrical insulation.
Uses: Using injection molding, blow molding, extrusion, rolling molding and other molding methods, the production of film products, daily necessities and industrial hollow containers of various sizes, pipe, packaging calendering tape and ligation tape, rope, fish net and weaving fiber.