-––
[
PATENTED PTFE/FKM ALLOY
PROVIDES ADDITIONAL FLEXIBILITY]
–-–
Perfluoroplastic, due to its crystalline nature, is
inherently stiff which reduces the long term flex
endurance and life of PTFE fabric expansion joints.
To overcome this shortcoming, fluoroelastomer
(Viton
®
/Fluorel
®
) is blended into a patented alloy
which bathes the coated fiberglass matrix significantly
increasing the flexibility, tear resistance, tensile and shear
strength of DARLYN fabricated belts. This means longer
in-service life.
DARLYN can be easily identified by its lack of stiffness.
The uniformly distributed alloy coating is more
compliant than PTFE, filling the voids and impregnating
the woven structure. This pliable matrix maintains
consistent physical and chemical properties over a wide
range of temperatures and corrosive conditions
experienced in flue gas ductwork.
CONSISTENT COATING PROCESS
The DARLYN series of products are coated and cured over a dozen times in the patented process.
The multilayer alloy coating of PTFE and FKM completely surrounds the fiberglass foundation,
and then is multi-coated with PTFE. This unique procedure is a characteristic of the detailed
quality and consistency which guarantees the longevity of the DARLYN products.
DARLYN material is manufactured with 100% defect free, continuous, twisted multiple filament
fiberglass. This means that for the entire length of your DARLYN belting material the strands are
uncut, homogeneous and guaranteed the strongest fiberglass fibers possible. Numerous strands
are than grouped and twisted together maximizing the flex, tensile, shear and tear characteristics
of thousands of filaments. These glass yarns are then bathed with a protectant PTFE coating to
resist self-abrasion and friction during flexing, and chemical attack preventing acid from wicking
in service, which destroys conventional woven glass.
18
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