Thermal upsets, an integral part of every hot mix asphalt plant, have caused the premature destruction of thousands of filter bags. Costly plant stoppages, environmental pollution and expensive filter bag replacement have been the result of these technical glitches. American Felt and Filter Company (AFFCO) has developed a solution to this age old problem. This is how we did it.
Woven Basalt is a fabric manufactured from volcanic rock. It is capable of withstanding thermal excursions up to 2000°F without any degradation whatsoever. AFFCO utilized woven Basalt as a scrim to build Nomex® felt. The result is The Heat ShieldTM.
We placed a regular Nomex® felt in an oven at 1000°F for 60 minutes. The Nomex® felt was destroyed beyond recognition. We then placed The Heat ShieldTM in the oven at 1000°F for 60 minutes. Zero shrinkage.
AFFCO is offering The Heat ShieldTM as a thermal insurance to the asphalt industry.
It took AFFCO, a company that has been around for more than 100 years, to develop a solution to a very old problem in the asphalt industry.
The Heat ShieldTM products can be manufactured with various fiber constructions for demanding applications to suit individual specifications. Some composite examples are PPS, P-84®, Kynol®, Basofil® Polyacrylonitriles, Polyacrylates, Teflon®, Nomex®, Etc...
For more information, designing, questions, clarifications or quotations please contact AFFCO.
| The Heat ShieldTM Data Sheet |
Specifications |
- Style 74/64HTBA14
- Construction Aramid with Basalt Scrim
- Finish Calendared, Singed one side
- Weight 14 oz/sq.yd
- Permeability 25 - 35 cfm
- Mullen Burst 550 - 650 psi
- Thickness 0.06 - 0.07 in.
- MD Tensile Strength 120 - 150 lb
- CD Tensile Strength 200 - 250 lb
- MD Elongation 10 - 20%
- CD Elongation 10 - 20%
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Materials of construction:
PPS P-84® Kynol® Teflon®
Basofil® Polyacrylonitriles Polyacrylates Nomex®
Surface finishes:
Calendering, glazing (eggshell), or singeing
Coatings:
PTFE, acrylic, or silicone
Blends and composites:
Dual density, fire resistant, static
retardant (stainless steel or epitropic)
Operating limitations:
Do not exceed recommended temperature
limitations of materials. Use only in chemically compatible environment
Standard basis weigths: (custom weights are available) 8, 10, 12, 14, 15, 18, and 18 oz/yd2
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