Search results
Results from the WOW.Com Content Network
The result is a hard plastic material. [27] Asbestos was gradually abandoned as filler because many countries banned the production of asbestos. [10]: 9 [28] Bakelite's molding process had a number of advantages. Bakelite resin could be provided either as powder or as preformed partially cured slugs, increasing the speed of the casting.
Parkesine, the first member of the Celluloid class of compounds and considered the first man-made plastic, is patented by Alexander Parkes. [4] 1869: John Wesley Hyatt discovers a method to simplify the production of celluloid, making industrial production possible. 1872: PVC is accidentally synthesized in 1872 by German chemist Eugen Baumann ...
The Kubotan keychain was originally based on a small bamboo weapon called a "hashi stick", an invention by Kubota's father, Denjiro. Its popularity grew from 1969 to the 1970s when Kubota, at the request of California State Senator Edward M. Davis, the former Chief of the Los Angeles Police Department, created the weapon and began training female officers in its application.
LDPE has SPI resin ID code 4 Schematic of LDPE branching structure. 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]
POM is a strong and hard plastic, about as strong as plastics can be, and therefore competes with e.g. epoxy resins and polycarbonates. The price of POM is about the same as that of epoxy. There are two main differences between POM and epoxy resins: epoxy is a two-component resin that can be cast, and adheres to everything it touches,
Duroplast is a composite thermosetting resin plastic developed by engineer Wolfgang Barthel in 1953 [2] in the German Democratic Republic. [ 3 ] [ 4 ] Its production method places it in a similar family as Formica and Bakelite .
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.
In the plastic-polluted waters of the Sargasso Sea, bacteria have been found that consume various types of plastic; however, it is unknown to what extent these bacteria effectively clean up poisons rather than simply release them into the marine microbial ecosystem. Plastic-eating microbes also have been found in landfills. [96]