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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.
A plastic bag, poly bag, or pouch is a type of container made of thin, flexible, plastic film, nonwoven fabric, or plastic textile. Plastic bags are used for containing and transporting goods such as foods, produce, powders , ice, magazines , chemicals , and waste .
A civil suit filed in Ireland alleged that McGregor had sex with a woman without her consent in 2018 in Dublin. McGregor says he will appeal.
Luigi Mangione charged with additional murder counts on Tuesday in the fatal shooting of UnitedHealthcare CEO Brian Thompson, officials announced.. Mangione, 26, was charged with one count of ...
Queen Camilla's chest infection stubbornly continues to linger.. The Queen, 77, has reluctantly pulled out of the Royal Variety Performance on Nov. 22, which she was due to attend alongside her ...
Such sources of secondary microplastics include water and soda bottles, fishing nets, plastic bags, microwave containers, tea bags and tire wear. [69] [68] [70] [71] Both types are recognized to persist in the environment at high levels, particularly in aquatic and marine ecosystems, where they cause water pollution.
In a special on CBC Television, green garbage bags (first bin bags in Canada) ranked 36th among the top 50 Canadian inventions. [3] Black plastic bags were introduced in 1950 as star sealed bags. The first bags in the United States were green and black, rather than the now-common white and clear. Flat-sealed bags first appeared in 1959.