LDPE is Widely Used For:

  • Orthotics
  • Prosthetics

Performance Characteristics:

  • Soft and pliable
  • Easy to weld and heat seal
  • Good chemical resistance
  • Low moisture absorption

Common Brands:

  • Orthoform®
  • C-TEK® MODStiff™
  • Densetec


Soft, flexible, lightweight plastic material that is easy to fabricate and form

LDPE (low density polyethylene) is a soft, flexible, lightweight plastic material. LDPE is noted for its low temperature flexibility, toughness, and corrosion resistance. It is not suited for applications where stiffness, high temperature resistance and structural strength are required. It is often used for orthotics and prosthetics. LDPE has good chemical and impact resistance and is easy to fabricate and form.

Shop for LDPE


INDUSTRIAL Sheet Dimensions:
48 in x 96 in
0.030 in – 0.500 in
sheet for O&P Dimensions:
12 in x 12 in – 48 in x 96 in
0.030 in – 0.500 in
C-TEK® MODStiff Dimensions:
24 in x 48 in – 48 in x 96 in
0.125 in – 0.156 in
ROD Outside Diameter:
0.250 in – 16 in
COLOR Sheet:
Natural, Black

Texture, Surface, Pattern Smooth

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


LDPE Properties and Material Options

LDPE Sheet Stress Relieved– offers improved machinability and dimensional stability over extruded LDPE.

FDA Compliant LDPE– LDPE is available in FDA compliant grades.

LDPE Sheet for O&P– Low Density Polyethylene is more flexible than HDPE, polypro, or copoly PP, making it an excellent choice for pediatric AFOs, some splints, and flexible socket interfaces.

C-TEK® MODStiff™– Offers a level of stiffness between modified polyethylene and copoly. This unique material is used in applications where modified polyethylene is not stiff enough and copoly is too stiff. The ability to downgauge material thickness provides the opportunity to lighten an orthoses. Watch video to learn more.

Modified LDPE Sheet for O&P– Modified polyethylene is slightly stiffer than LDPE, but more flexible than HDPE, polypro, or copoly PP. It is used for applications where flexibility and light support are required.

Tech Tip– LDPE materials can be difficult to decorate with transfer paper.


Typical properties of LDPE
Tensile strength psi D638 1,400
Flexural modulus psi D790 30,000
Izod impact (notched) ft-lbs/in of notch D256 no break
Heat deflection temperature @ 264 psi °F D648 122
Maximum continuous service temperature in air °F   -
Water absorption (immersion 24 hours) % D570 0.10
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.


  • HDPE vs. LDPE — One is more rigid while the other is more flexible, but which is right for your specific application?

Explore the physical, mechanical, thermal, electrical, and optical properties of LDPE.

Sort, compare, and find the plastic material suited for your application using our interactive properties table.