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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.
He taught at both the high school and college level before going to work in research at the Phillips Petroleum Company in 1944. His work was primarily in the area of plastics and catalysts. In 1951, he invented crystalline polypropylene and high-density polyethylene (HDPE) with his fellow research chemist Robert Banks .
They invented a machine which extracted the fibres from wood (exactly as with rags) and made paper from it. Charles Fenerty also bleached the pulp so that the paper was white. This started a new era for paper making. By the end of the 19th-century almost all printers in the western world were using wood instead of rags to make paper. [119]
Finch Paper LLC (Finch, Pruyn Company) is an American paper manufacturing corporation, operating in Glens Falls, New York, for 150 years. [25] [26] [27] In Mechanicville, New York, Westvaco Corporation's MeadWestvaco 6 paper machines ran non-stop to feed the printing presses of the nation's leading publishers. After WWII the Westvaco plant was ...
In 1892 the company relocated from Bethlehem, Pennsylvania to Hudson Falls, New York, where it had a paper mill. The Union Camp Corporation was formed by the 1956 merger of the Union Bag and Paper Company with Camp Manufacturing. [2] Currently his company is under the ownership of International Paper. [4]
For example, the medical community in 1958 was eager to use Marlex 50 crystalline polyethylene which softens at 260 °F (127 °C). Objects made of Marlex could be sterilized in high-temperature autoclaves without affecting their form. [1] Marlex was used by Wham-O for their Hula Hoops in the 1950s, which helped create a market for this form of ...
A paper cup is a disposable cup made out of paper and often lined or coated with plastic [1] [2] or wax to prevent liquid from leaking out or soaking through the paper. [3] [4] Disposable cups in shared environments have become more common for hygienic reasons after the advent of the germ theory of disease.
The "handsheets" made according to TAPPI Standard T 205 [20] are circular sheets 15.9 cm (6.25 in) in diameter and are tested for paper characteristics such as brightness, strength and degree of sizing. [21] Paper made from other fibers, cotton being the most common, tends to be valued higher than wood-based paper. [citation needed]