| Products
> PTFE Fabrics > Porous (27 Series)
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| Product
Description |
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 The DuraFlow® Porous Fabrics are specially formulated to be "breathable," while at the same time, maintaining their unique non-stick properties. These fabrics are manufactured from woven fiberglass substrates that have been lightly coated with PTFE (Fluon®) The DuraFlow® Porous Fabrics possess controlled porosities that allow products to cure and outgas through the fabric. Because of their unique properties, these fabrics are excellent for use in a wide variety of applications, from the manufacture of polymers to a release medium for composite molding.
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| DuraFlow®
PTFE Coated Fabric Characteristics |
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DuraFlow® Fabrics are engineered to retain the distinctive properties of PTFE; however, by adding a glass fabric to the matrix, AFC is able to obtain the added benefits of dimensional stability, durability, excellent tensile strength and extremely low elongation (<1%). DuraFlow® Fabrics have received USDA approval for food processing and handling, and are FDA compliant (21 CFR177.1550). In addition, the DuraFlow® fabrics can operate in temperatures from -400°F (-240°C) under static conditions and -100°F (-73°C) under dynamic conditions up to 550°F (288°C).
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| Typical
Applications |
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Polymer Processing:
 Manufacture of silicone rubber sheet
Curing rubber and plastic foams
and sponge
Aerospace, Communications
& Military:
Composite mold release
Release sheets for fabricating
glass-resin structures
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Other Applications:
Insulation and protection
Release sheets/separation materials
Drying painted or lacquered products
Additional applications exist. Contact
AFC for more specific information.
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| Styles
Available |
Product
ID |
Nominal
Thickness |
Weight
(lbs/sq yd) |
Tensile Warp*
(lbs/sq in) |
Tensile Fill*
(lbs/sq in) |
Edge Tear
Warp (grams) |
Edge Tear
Fill (grams) |
Full Widths
(inches) |
| 27-03 |
.003" |
0.13 |
56 |
32 |
380 |
250 |
40*, 80* |
| 27-05 |
.005" |
0.26 |
100 |
112 |
800 |
700 |
40*, 80* |
| 27-10 |
.010" |
0.48 |
200 |
160 |
1400 |
1100 |
40*, 60*, 80* |
| 27-14 |
.014" |
0.70 |
320 |
232 |
3700 |
3200 |
40*, 80* |
| 27-25 |
.025" |
1.30 |
520 |
472 |
>6400 |
>6400 |
38*, 60* |
| 27-28 |
.028" |
Proprietary |
Proprietary |
Proprietary |
>6400 |
>6400 |
84*, 141* |
| 27-33 |
.033" |
Proprietary |
Proprietary |
Proprietary |
>6400 |
>6400 |
82*, 141* |
| 27-38 |
.038" |
1.90 |
760 |
640 |
>6400 |
>6400 |
62*, 66* |
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Please note: Additional thickness and styles available upon special order and lead times may vary for different styles and widths.
*Disclaimer: All figures provided in the above table are based upon ASTM D 4969-97, the Standard Specification for Polytetrafluoroethylene (PTFE) Coated Glass Fabric. The above tensile values are based upon the ASTM D828 test method and are not actual values of AFC’s materials. The above tensile values are 80% of the figures provided in Table 6 of specification D579. AFC states that its actual tensile will be greater than the above material specification and that actual tensile values will be provided upon request. Edge Tear values are based upon ASTM D1424 (Elmendorf Tearing Test) and are average values that can vary.
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