Polypropylene

Polypropylene is Widely Used For:

  • Chemical and plating tanks
  • Fire truck water tanks (copolymer polypropylene)
  • Cutting boards for food preparation
  • Semiconductor equipment cabinets
    and work surfaces
  • Lower & upper extremity orthoses:
    body jackets, AFOs, KAFOs, DAFOs,
    helmets, splints (O&P)
  • Rigid, outer prosthetic sockets (O&P)

Performance Characteristics:

  • Easy to weld using thermoplastic welding equipment
  • Easy to fabricate, seam, and drape and
    blister form (O&P)
  • Easy to decorate with transfer patterns (O&P)
  • Low moisture absorption; good chemical resistance
  • Extremely tough (copolymer)
  • Excellent aesthetic properties

Common Brands:

  • Orthoform®
  • SIMOLIFE
  • Polystone®


Polypropylene

Low cost, chemical resistant plastic with excellent aesthetic qualities

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. Polypropylene is easy to decorate with transfer patterns for O&P applications.

Polypropylene is available in both homopolymer and copolymer grades

Shop for Polypropylene

 

STANDARD SIZES
INDUSTRIAL SHEET Dimensions:
48 in x 96 in
Thickness:
0.062 in – 4 in
O&P SHEET Dimensions:
12 in x 12 in – 48 in x 96 in
Thickness:
0.030 in – 0.750 in
INDUSTRIAL ROD Outside Diameter:
0.250 in – 14 in
OPTIONS AVAILABLE
COLOR Industrial Sheet:
Natural, Black, White

O&P Sheet:
Natural, Black, White Brown, Flesh, Blue, Pink, Purple, Red, Silver, Neon Green, Neon Pink, Royal Blue
TEXTURE, SURFACE, PATTERN Textured, Smooth
GRADES FDA Compliant, Heat Stabilized, Medical

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes and colors available upon request.
 

POLYPROPYLENE MATERIAL OPTIONS

Homopolymer Polypropylene (Polypro)– Homopolymer polypropylene is stronger and stiffer than copolymer. It is a very durable, rigid plastic available in natural (a translucent white) and a variety of colors. Easily formed, polypropylene is widely used for body jackets, upper and lower extremity orthoses (especially AFO’s), and rigid outer prosthetic sockets.

Copolymer Polypropylene (Copoly PP)– Copolymer polypropylene is a bit softer, but it is tougher and more durable than homopolymer polypropylene. Copolymer polypropylene tends to have better stress crack resistance and low temperature toughness than homopolymer polypropylene. Used in many of the same applications as homopolymer polypropylene, but where slightly more flexibility is needed.

Tech Tip For O&P Fabricators– Homopolymer recommended oven temperatures are 325°F to 350°F.
Copolymer recommended oven temperatures are 300°F to 350°F.

 

Typical Properties OF Polypropylene
  UNITS ASTM TEST POLYPROPYLENE
HOMOPOLYMER
POLYPROPYLENE
COPOLYMER
Tensile strength psi D638 5,400 3,800
Flexural modulus psi D790 225,000 215,000
Izod impact (notched) ft-lbs/in of notch D256 1.2 12.5
Heat deflection temperature
@ 264 psi
°F D648 210 190
Maximum continuous service
temperature in air
°F   - -
Water absorption
(immersion 24 hours)
% D570 slight slight
Coefficient of linear thermal
expansion
in/in/°Fx10-5 D696 - -

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

Need more information about this material? Use our interactive plastic properties table