Porous (27 Series)

Porous (27 Series)

Porous (27 Series) belts are “breathable,” while at the same time, maintaining their unique non-stick properties.


Porous (27 Series)

The DuraFlow® Porous Belts are specially formulated to be “breathable,” while at the same time, maintaining their unique non-stick properties. These belts are manufactured from woven fiberglass substrates that have been lightly coated with PTFE (Fluon®). The DuraFlow® Porous Belts possess controlled porosities that allow products to cure and outgas through the fabric. These unique properties make these belts ideal for a wide variety of applications from the manufacture of sponge and foams to the manufacture of wood laminates.

DuraFlow® PTFE Coated Belt Characteristics

DuraFlow® Belts 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, excellent tensile strength and extremely low elongation (<1%). DuraFlow® Belts have received USDA approval for food processing and handling, and are FDA compliant (21 CFR177.1550). In addition, the DuraFlow® belts 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).

Typical Applications



  • Shrink packaging
  • Bundling

Food Products:

  • Baking and cooking of bakery goods and confectionary
  • Cooking and grilling of meat, poultry, fish and vegetables
  • Cryogenic/flash freezing of meat, poultry, fish and vegetables

Printing and Textiles:

  • Processing of natural, synthetic, woven, non-woven, and knitting fabrics
  • Drying and curing of screen printed paper, metal, glass, wood, plastic, and textiles
  • Heat setting of synthetic yarn


Polymer Processing:

  • Curing and drying of rubber, sponge, foams, and polyurethane glues

Building Products:

  • Vacuum processing of laminates


  • Curing and drying of varnish
  • Manufacture of paint chips
  • Processing of printed circuit boards

Additional applications exist. Contact AFC for more specific information.

Styles Available



(lbs/sq yd)

(lbs/in. of width)

Edge Tear
Warp (grams)

Edge Tear
Fill (grams)

Min. Pulley Dia.

Widths (in.)

27-03 .003″ 0.13 32 380 250 3″ 80
27-05 .005″ 0.26 112 800 700 3″ 80
27-10 .010″ 0.48 160 1400 1100 3″ 80
27-14 .014″ 0.7 232 3700 3200 6″ 80
27-25 .025″ 1.3 472 >6400 >6400 8″ 60
27-28 .028″ Proprietary Proprietary >6400 >6400 10″ 141
27-33 .033″ Proprietary Proprietary >6400 >6400 10″ 141
27-38 .038″ 1.9 640 >6400 >6400 10″ 60

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