A plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic polymers of high molecular mass, but they often contain other substances. They are usually synthetic, most commonly derived from petrochemicals, but many are partially natural. Plastics are synthetic materials created by linking together into polymers - i.e., polymerizing - molecules of monomer raw material derived from petroleum, natural gas or coal. Polymers alone rarely have the physical qualities to be of practical value, so most plastics contain various chemical additives to facilitate the manufacturing process or produce a particular desirable property, such as flexibility or toughness.
High temperature plastics have a permanent operating temperature of more than 150`C .
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