The Porous Series of PTFE Fabrics is specifically designed to control porosities thus allowing products to cure and out-gas through the fabric. This functionality makes it the ideal fabric for any chemical or composite curing application. Because of their unique properties, these fabrics are excellent for use in a wide range of applications, from the manufacture of polymers to a release medium for composite molding. They are specifically formulated to be breathable and maintain the non-stick properties offered by PTFE.

These fabrics are manufactured from woven fiberglass substrates that have been lightly coated with PTFE. They are food safe and FDA Compliant.

Typical Applications

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Polymer Processing

  • Manufacture of silicone rubber sheet
  • Curing rubber & plastic foams and sponge
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Aerospace, Communications & Military

  • Composite mold release
  • Curing rubber & plastic foams and sponge

Other Applications

  • Insulation and protection
  • Release sheets/separation materials
  • Drying painted or lacquered products

Technical Data

Porous PTFE Fabric Specifications

Continuous Operating Temperature Range -100° to 550° F
Substrate Woven Fiberglass
Coating PTFE
Color Tan
Food Safety FDA Compliant
Item Number Nominal Thickness (inches)Weight (lbs./ sq..yd.)Tensile Warp (lbs./in.)Tensile Fill (lbs./in.)Edge Tear Warp (oz.)Edge Tear Fill (oz.)Full Widths (inches)
27-03 .003" 0.12 56 32 13 9 38, 50, 60, 80
27-05 .005" 0.24 100 96 28 25 80
27-10 .010" 0.50 200 160 49 39 44
27-14 .014" 0.70 320 232 130 113 40, 80
27-25 .025" 1.30 520 472 225 225 50, 62
*Although material width is standard, additional lead-time may be required.
Please note: Additional thicknesses and styles are available upon special order.

What is PTFE?

Polytetrafluoroethylene (PTFE), a fluorocarbon plastic, is a plastic in which the hydrogen normally found in association with carbon in organic materials has been replaced with fluorine. The resulting polymer possesses a number of unique properties: inertness to chemicals, fire resistance (will not support a frame); excellent weathering resistance; low friction (second only to ice); superior anti-stick properties; flexibility; extreme heat and cold resistance; outstanding electrical, insulative and dielectric properties; and resistance to ultraviolet (UV), infrared (IR), microwave and radio frequency (RF).

Mechanical PTFE Fabrics are manufactured in 4 common thicknesses: 0.003″, 0.005″, 0.009″, 0.010″, and 0.014″