Polypropylene Properties

Physical, mechanical, thermal, electrical, and optical properties of polypropylene

Polypropylene is a low cost, chemical resistant plastic with excellent aesthetic qualities. It is easy to weld using thermoplastic welding equipment and is often fabricated into water and chemical tanks.

Polypropylene used in the manufacturing of upper and lower extremity orthoses and prosthetics offers the O&P fabricator a material that is easy to drape, blister form and seam. It is easy to decorate with transfer patterns for O&P applications. FDA compliant polypropylene grades are available. Polypropylene is available in homopolymer, carbon reinforced homopolymer, and copolymer grades.

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For a glossary of terms, see our Plastic Properties Descriptions.

 

TYPICAL PROPERTIES
  UNITS ASTM TEST  
Tensile Strength psi D638 5,400
Flexural Modulus of Elasticity psi D790 225,000
Izod Impact (notched) ft-lbs/in of notch D256 1.2
Heat Deflection Temperature (66psi / 264psi) °F D648 210    - 
Water Absorption
(Immersion 24 hours)
% D570 slight

 

PHYSICAL PROPERTIES
  UNITS ASTM TEST  
Specific Gravity - D792 0.91
Water Absorption
(Immersion 24 hours)
% D570 slight

 

MECHANICAL PROPERTIES
  UNITS ASTM TEST  
Tensile Strength psi D638 5,400
Tensile Modulus of Elasticity psi D638 -
Tensile Elongation % D638 -
Flexural Strength psi D790 -
Flexural Modulus of Elasticity psi D790 225,000
Compressive Strength psi D695 -
Hardness scale as noted D785, D2240 Shore D 75
Izod Impact ft-lbs/in D256 1.2

 

THERMAL PROPERTIES
  UNITS ASTM TEST  
Coefficient of Linear Thermal Expansion in/in/°F x 10-5 D696 5.0
Heat Deflection Temperature (66psi / 264psi) °F D648 210    - 
Max Continuous Service Temperature In Air °F - 180

 

ELECTRICAL PROPERTIES
  UNITS ASTM TEST  
Dielectric Strength V/mil D149 -

 

OPTICAL PROPERTIES
  UNITS ASTM TEST  
Light Transmittance % D1003 -
Haze % D1003 -

 

OTHER
  UNITS ASTM TEST  
Coefficient of Friction - Dynamic -

Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.

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