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Open bags with carrying handles are used in large numbers. Stores often provide them as a convenience to shoppers. Some stores charge a nominal fee for a bag. Heavy-duty reusable shopping bags are often considered environmentally better than single-use paper or plastic shopping bags.
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]
Some large store chains have banned plastic shopping bags such as Whole Foods in the U.S. [37] and IKEA in the U.S. and the U.K. [38] Heavy-duty plastic shopping bags are suitable for reuse as reusable shopping bags. Lighter weight bags are often reused as trash bags or to pick up pet feces. All types of plastic shopping bag can be recycled ...
Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene.Also known as high-modulus polyethylene (HMPE), it has extremely long chains, with a molecular mass usually between 3.5 and 7.5 million amu. [1]
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.
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 ...
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