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Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene. It was the first grade of polyethylene , produced in 1933 by John C. Swallow and M.W Perrin who were working for Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization . [ 1 ]
Video game packaging refers to the physical storage of the contents of a PC or console game, both for safekeeping and shop display. In the past, a number of materials and packaging designs were used, mostly paperboard or plastic. Today, most physical game releases are shipped in jewel cases or keep cases, with little differences between them.
A German plastic shopping bag, freshly folded (left) and used (right) Milk bags Different meat products of Thailand in plastic bags. American and European patent applications relating to the production of plastic shopping bags can be found dating back to the early 1950s, but these refer to composite constructions with handles fixed to the bag ...
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.
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]
North America (i.e. the North American Free Trade Agreement or NAFTA region) accounts for 21% of global plastic consumption, closely followed by China (20%) and Western Europe (18%). In North America and Europe, there is high per capita plastic consumption (94 kg and 85 kg/capita/year, respectively).
Plastic bag ban for large retailers; 10 cent charge for paper bags. A higher fee may be adopted by the municipality or county in which the store is located. [2] City of Aspen: October 2011: May 2012: Plastic bag ban for large retailers; 20 cent charge for paper bags. [32] Town of Avon: May 1, 2018: Plastic bag ban; 10 cent tax on paper bags ...
Plastic bags were banned in the self-declared Republic of Somaliland on 1 March 2005 after a 120-day grace period that the government had given to the public to get rid of their stocks. The Ministry of Trade and Industries announced the cabinet decision in a decree titled: "Banning importation, production and use of plastic bags in the country".
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