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Typically it involves the melting of a plastic from pellet shape through an extruder. The plastic is melted to soften and then goes through a die to give it it's shape. It can be blown film, sheet extrusion, injection molded, blow molded, etc. Depending on the type of process used depends on the final product.

Blown film and sheet extrusion usually make either rolls of flat film, or cut to length sheets. Injection molded, and blow molded parts can make things like buckets, chairs, to small medical devices.

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