Thermoset Composites

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Performance Characteristics
Typical Applications
Typical Properties
Thermoset composite materials have the advantage of having extremely high strength and stiffness at relatively low cost when compared with thermoplastics.

Each thermoset composite consists of a reinforcement material such as glass fiber or woven cotton that has been impregnated with a plastic resin such as phenolic or epoxy. The resulting composite has unique properties depending on the resin-reinforcement combination selected.

Thermoset Composite Standard Sizes

SHEET 36"x48" (0.03"-10.0" thick)
48"x96" (0.03"-4.0" thick)

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

Thermoset Composite Grades (Commercially Available)

  • Paper Phenolic

    X, XX, and XXX, and punchable grades
  • Canvas Phenolic

    C and CE
  • Linen Phenolic

    L and LE
  • Glass Epoxy

    FR-4, G-10, and G-11
  • Glass Melamine

    G-5 and G-9
  • Glass Silicone

  • Glass Polyester

    GPO-1 and GPO-3

NOTE: Several grades of thermosets are available. For additional information on thermoset composites, contact your local Curbell Plastics representative or call Curbell at 1-888-287-2355.
Performance Characteristics
  • Strong and stiff
  • Outstanding electrical properties (electrical grades)
  • Excellent bearing and wear properties (bearing grades)
  • Good creep resistance
  • Dimensionally stable
  • High temperature grades available
Typical Applications
  • Electrical insulators (electrical grades)
  • Countertops and other work surfaces
  • Bearings, bushings, and gears (bearing grades)
  • Wear pads (bearing grades)
Typical Properties
(Canvas Phenolic)
(Linen Phenolic)
(Glass Epoxy)
(Glass Silicone)
Specific gravity D-792 1.35 1.37 1.34 1.80 1.88
Tensile strength (CW) psi D-638 11,500 9,000 9,000 38,000 -
Flexural strength (CW) psi D-790 17,000 15,000 16,000 60,000 15,400
Flexural modulus psi D-790 - 1,500,000 1,200,000 2,400,000 -
Compressive strength psi D-695 25,000 34,000 36,000 55,000 -
Hardness Rockwell (scale as noted) D-785 M95 M100 M100 M110 M100
Izod impact (notched, CW) ft-lbs/in of notch D-256 0.4 1.5 1.1 12.0 8.5
Maximum continuous service temperature in air °F 266 257 257 266 338
Water absorption (immersion 24 hours) % D-229 2.00 2.00 1.90 0.10 0.19
Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.
Contact Curbell Plastics at 1-888-287-2355 for more specific information about thermoset composites or complete our request for quote online form.