Commonly used plastics types:

Polyethylene (Polyethylene) (PE): There is a wide use area of polyethylene and it is very cheap.
Polypropylene (Propylene) (PP): It is one of the plastic widely used. Polypropylene uses in automobile aftermarket, garden furniture and so on.
Polystyrene (Polystyrene) (PS): Polystyrene plastics uses in packing, electronics and there are application areas, such as plastic parts of white belongings.
Polyethylene terephthalate (Polyethylene Terephthalate) (PETE) is a type of plastic used in the manufacture of PET bottles.
Polyamide (Polyamide) (PE) (Nylon): Polyamide uses at fibers, toothbrush bristles, fishing lines.
Polyester (Polyester): Polyester most commonly used in textiles.
Polyvinyl chloride (Polyvinyl chloride) (PVC) Is a plastic type used in the manufacture of pipe, profile.
Polycarbonate (Polycarbonate) (PC): Used in the manufacturing of products such as CD, glasses, etc.
Acrylonitrile butadiene styrene (Acrylonitrile butadiene styrene) (ABS) Generally is used in plastic components of electronic devices.
Polyvinylidene chloride (polyvinylidene chloride is) (PVDC) (Saran): This is the type of plastic used in food packaging.

Special Plastics
Polytetrafluoroethylene (Polytetrafluoroethylene) (PTFE) (Teflon): Used in heat resistances, cooking pans and so on.
PU (Polyurethane): The most common use is to use as insulation foam.
Bakelite (Bakelite): Used in electrical equipment construction and furniture.
Polylactic acid (Polylactic acid) are widely used as biodegradable packaging material.