HDpe torumaterjali lühitutvustus
Jan 16, 2022
High density polyethylene, the English name is "High Density Polyethylene", referred to as "HDPE". HDPE is a highly crystalline, non-polar thermoplastic resin. The appearance of the original HDPE is milky white, and it is translucent to a certain extent in the thin section. PE has excellent resistance to most household and industrial chemicals. Certain types of chemicals are chemically aggressive, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene), and halogenated hydrocarbons (carbon tetrachloride). The polymer is non-hygroscopic and has good water vapour resistance for packaging applications. HDPE has good electrical properties, especially high insulation dielectric strength, making it very suitable for wires and cables. Medium to high molecular weight grades have excellent impact resistance at ambient temperatures and even as low as -40F.
Kuigi HDPE võeti kasutusele 1956. aastal, pole plast veel küpsuseni jõudnud. Seda mitmekülgset materjali arendatakse pidevalt uute kasutusviiside ja turgude jaoks.
PE-d saab valmistada väga erinevate töötlemismeetoditega. Nende hulka kuuluvad näiteks lehtede ekstrusioon, kile ekstrusioon, torude või profiilide ekstrusioon, puhumisvormimine, survevalu ja pöörlev vormimine.
