Resin Families

Polypropylene (PP)

All Resin Families

Polypropylene is known for its good mechanical properties, heat resistance, and chemical resistance. In addition, PP has the highest flexural modulus of the polyolefins, is among the lightest of the engineering thermoplastics (SG=0.90), and has excellent moisture resistance.

Homopolymers exhibit high stiffness, Copolymers have impact and ductility advantages, while random copolymers display good clarity and have a low melting point.

Polypropylene is a thermoplastic polymer and one of the most commonly produced plastics in the world. There are two types of polypropylene; homopolymers and copolymers. In each category there are a number of products offering different properties which allow for a wide range of uses. Some of the properties polypropylene offers are chemical resistance, elasticity and toughness, fatigue resistance, insulation and transmissivity. Polypropylene is used for caps and closures, appliances, furniture, housewares, packaging, films, fibers or automobiles.

Polymer Characteristics

  • low density (weight saving)
  • high stiffness
  • heat resistance
  • chemical inertness
  • steam barrier properties (food protection)
  • good transparency · good impact/rigidity balance
  • stretchability (film and fiber applications)
  • good hinge property (for example where a lid and box are made together, for DVD boxes)
  • high gloss (appearance)
  • easy to weld (design)
  • recyclabililty


  • Calcium carbonate
  • Glass fiber
  • Glass bead
  • Mineral
  • Glass/Mineral
  • Talc
  • Lubricated
  • Antistatic
  • Flame retardant
  • Nucleated
  • Clarified
  • UV stabilized

Processing Methods

  • Injection molding
  • Extrusion
  • Coextrusion
  • Blow molding
  • Compression molding
  • Film
  • Thermoforming

Typical Applications

  • Plastic chairs
  • Hospital ware
  • Automotive ducts and trim
  • Automotive battery cases
  • ‘Living hinge’ applications
  • Containers

Trade Names

AMCO Primatop PP®, Ravago ECHO®, Phillips Copylene®, Formosa Formolene®, Total PP®