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TSOP is a family of thermoplastics made in its largest part of polypropylene (Toyota itself refers to the TSOP as a "non conventional high-performance polypropylene"), plus three other resins compounds. The second main compound is an elastomer (synthetic butadiene rubber). The elastomer is used as a continuous phase and the PP resin is introduced into the elastomer as micro dispersed crystals.

There are six kinds of TSOP, used in differents parts of the car and differents years. Their use begins with the Crown series in October 1991. TSOP2 have high flowability, and trim and garnishes are made of it. TSOP3 have high-rigidity, high-impact-resistance, and is primarily employed in instruments panels. TSOP5 and TSOP6 are a mix of 2 and 3 and are widely used in exterior parts such as bumpers.

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12y ago

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