Injection Moulding for Polypropylene (PP) Parts

Thermoplastic polymer is used in packaging of consumer products and plastic components

Get A Quote

What is Polypropylene

Polypropylene (PP) is a thermoplastic addition polymer, which is used predominantly in injection moulding applications. PP is inexpensive and easy to access, and due to its semi-crystalline property it possesses a high flexural strength.

Key Benefits: PP is resistant to moisture absorption, and has a very slippery surface that makes it a good substitute for other plastics in a variety of low-friction applications. Polypropylene's properties are similar to polyethylene, but PP is slightly harder and more heat resistant.

Compare Properties of Moulded Polypropylene

We offer numerous polypropylene options available for injection moulding applications, each with their own distinctive qualities.
Materials

Tensile Strength (Yield)
(ISO 527-1/-2)

Tensile Elongation (Break)
(ASTM D638)

 Flexural Modulus

Heat Deflection
(ISO 75-2)

 Key Attributes Data Sheet
Ramofin PPH300G4 Natural 70 MPa (ASTM D638) 3%  3200 MPa (ASTM D790A) 153 °C (ASTM D648)
  • 20% Glass-Fire Reinforced PP for IM application
  • RoHS Compliant
  • Low Water Absorption
 Data sheet
Ineos PP 500-GA20 Natural 23 MPa  N/A 1000 MPa (ISO 178) 85°C 
  • High Impact Resistance
  • Good Thermal Stability
 Data sheet
Moplen RP348R Natural 30 MPa  N/A 1150 MPa (ISO 527-1/-2) 80°C 
  • Good Flowability
  • Optical Properties
  • Improved Productivity
  • Antistatic Additivation
 Data sheet
green plastic part

Material Alternatives for Injection Moulding

Navigating supply chain issues is a constant challenge, especially in times of material shortages. To help, we created a detailed guide to resin substitutes for commonly moulded thermoplastics.

Read More
Engels machines

Applications of Polypropylene

Polypropylene is featured in an array of injection moulding applications, including the packaging of consumer products as well as being regularly used in plastic components in the automotive industry. Because of its relatively low density and weight, polypropylene can also be used in a variety of moulded PP products such as:

  • Children's toys
  • Sporting goods
  • Caps
  • Closures
  • Automotive applications
  • Food trays
  • Cups and to-go containers
  • Household goods and appliances like dishwashers
Part design courtesy of Engels Machines