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of technical information by Sanko Gosei Co., Ltd.,
Plastic, in the from of celluloid, was first introduced in the late 19th century. The disadvantage was that it was flammable, so after World War Ⅱ it was replaced by thermoplastics.
The raw material for plastic is petroleum, which undergoes a number of processes to become plastic material. Gasoline used in automobiles is the same raw material is used for manufacturing plastic.
Some plastics soften when heated(in the same way that chocolate softens when heated), and other types of plastics harden when heated (think of how eggs "harden" when they are heated). Sanko can process any type of plastics
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