SHEERFILL® is the trademark for a family of membranes used in permanent structures.
The composite is made of fiberglass and polytetrafluoroethylene (PTFE). SHEERFILL products are available in a range of strengths and light transmission levels, providing the user with a choice of membranes to cover virtually any size structure from a full-sized stadium to a relatively small skylight. All SHEERFILL membranes conform to rigid fire and building codes for permanent buildings.
Typical Properties*
Property
|
Value
|
Method
|
| Coated Fabric Weight (oz./yd.2) |
29 nominal |
ASTM D4851-88 |
| Thickness (mils) |
22 nominal |
ASTM D4851-88 |
Breaking Strength (lb./in.)
(Strain Rate: 2 in./min.) |
|
ASTM D4851-88 |
|
Dry, Warp
|
520 min. avg. |
|
|
Dry, Fill
|
590 min. avg. |
|
| Breaking Strength After Crease Fold (lb./in.) |
|
ASTM D4851-88 |
|
Dry, Warp
|
355 min. avg. |
|
|
Dry, Fill
|
380 min. avg. |
|
| Trapezoidal Tear (lb.) |
|
ASTM D4851-88 |
|
Warp
|
35 min. avg. |
|
|
Fill
|
380 min. avg. |
|
| Solar Transmission (%) |
17.5 nominal |
ASTM E424 |
| Solar Reflectance (%) |
72.5 nominal |
ASTM E424 |
| Burning Characteristics |
|
|
|
Flame Spread
|
0 max. |
ASTM E84 |
|
Smoke Generation
|
0 max. |
Tunnel Test |
| Incombustibility of Substrates |
Pass |
ASTM E136 |
| Fire Resistance of Roof Coverings Burning Brand |
Class A |
ASTM E108 |
| Flame Resistance |
Pass |
NFPA 701, Small Scale |
| Color |
White (after exposure to sunlight) |
|
| Reinforcement Construction |
Warp β150 2/2, Fill β150 2/3-Count W32 x F23 |
|
* Values listed are for virgin roll goods only. Appropriate industry safety factors need to be used to account for the in-service effects of handling, weathering, etc.
Contact Details
For more information, Contact Us through this site, or by calling:
+1 800 451 6101
+1 603 424 9000, x2396