Glass fiber it is the most common PTFE filler and it can increase the wear and creep resistance of PTFE. 25% glass fiber filled PTFE rod material can be used in oxidizing environments, but be aware that glass fiber reacts with HF and strong bases.
25% glass fiber filled PTFE rod material has a slightly higher coefficient of friction but better extrusion resistance than Glass fiber amd Moly filled PTFE materials. They are typically used in seal components for dynamic applications. 25% glass fiber filled PTFE rod also prefers a lubricated environment and are used to seal against steel, stainless steel, and chromium-plated surfaces.
Glass Fiber Filled PTFE Grades
GL7504 - 4% Fiberglass Filled PTFE Rod GL7505 - 5% Fiberglass Filled PTFE Rod GL7510 - 10% Fiberglass Filled PTFE Rod GL7515- 15% Fiberglass Filled PTFE Rod GL7520 - 20% Fiberglass Filled PTFE Rod GL7525 - 25% Fiberglass Filled PTFE Rod GL7515- 15% Fiberglass Filled PTFE Rod GL7520 - 20% Fiberglass Filled PTFE Rod
Glass Fiber Filled PTFE Properties
• Glass Fiber PTFE has an exceptional resistance to water. • Chemically Inert (Exceptions in HF and Strong Bases) • Performs well in oxidizing environments • Increases wear and creep resistance
Weakness
25% glass fiber filled PTFE rod must be avoided with the use of strong alkalis and hydrofluoric acid.
Typical Applications
• Ideal for high load bearing applications, against high hardness surfaces. • Cookware coatings and rotating platforms • Containers and pipelines for chemicals • Bearings and bearing pads • Valve seats and valve plugs • Machinery lubricant • Piston rings • Wear Pads • Gaskets
25% Glass Fiber Filled PTFE Rod Properties
Properties
Test Methods
Typical Value
Test Unit
Density
ASTM D792
2.24
g/cm3
Hardness shore D
ASTM D2240
≥ 55
Sh.D
Tensile strength
ASTM D4894
18 - 21
Mpa
Elongation at break 23°C
ASTM D4894
210
%
Coefficient of dynamic friction
ASTM D1894
0.15
-
Flammability
UL 94
V-0
-
Thermal conductivity 23°C
DIN 52612
0.43
W/K.m
Water absorption Max
ASTM D570
0.014
%
Working temperature
-
-200 to 260
°C
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