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HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]
Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane. [12] [a] [13] [b] When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white, waxy substance that he had created, they recognized that it contained long −CH 2 − chains and termed it polymethylene.
Chevron Phillips Chemical (CPChem) is a petrochemical company that is a 50/50 joint venture between Chevron Corporation and Phillips 66.The company was formed July 1, 2000, by merging the chemicals operations of both Chevron Corporation and Phillips Petroleum Company.
Some Tyvek products are marked with the #2 resin-code for HDPE, and can be collected with plastic bottles as part of some municipal curbside recycling programs. DuPont runs a program in the United States where disposable clothing, coveralls, lab coats, medical packaging and other non-hazardous Tyvek disposable garments can be recycled, as well ...
Start-up of the first Hostalen high-density polyethylene (HDPE) process plant. 1982: Spheripol process, currently the most widely used polyolefins process technology, first introduced by predecessor company Montedison 1985: Lyondell Chemical Company is formed from selected chemical and refining assets of Atlantic Richfield Company (ARCO). 1989
The installation of high-density polyethylene (HDPE) pipe in a storm drain project in Mexico, photographed in 2012. HDPE is a polyethylene thermoplastic made from petroleum that is known for its high strength to density ratio.
Extrusion coating is the coating of a molten web of synthetic resin onto a substrate material. It is a versatile coating technique used for the economic application of various plastics, notably polyethylene, onto paperboard, corrugated fiberboard, paper, aluminium foils, cellulose, non-wovens, or plastic films.
Marlex is a trademarked name for a crystalline polypropylene and high-density polyethylene (HDPE). These plastics were invented by J. Paul Hogan and Robert Banks, two research chemists at the Phillips Petroleum Company in 1951.
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