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Formula: PTFE 25% GF
Form: Foil/Film/Sheet
Material: PTFE filled with Glass
Commodity: Polymers
PTFE filled with Glass films are part of Goodfellow's range of polymer laminates. This material combines polytetrafluoroethylene (PTFE) with a glass fiber reinforcement to produce a composite with enhanced mechanical and thermal properties compared to unfilled PTFE. The addition of the glass fibers also improves the strength and creep resistance of PTFE while maintaining its non-stick surface and chemical resistance. With 61 variations available, this versatile laminate can be customized for applications ranging from electrical insulators and thermal barriers to low-friction bearings and seals.
Tolerances
Foil/Film/Sheet
| Thickness | ±20% |
|---|
Material Properties for Polymers
Chemical Resistance
| Element | Value |
|---|---|
| Acids - concentrated | Poor |
| Acids - dilute | Good |
| Alcohols | Good |
| Alkalis | Good-Fair |
| Aromatic hydrocarbons | Good |
| Greases and Oils | Good |
| Halogenated Hydrocarbons | Good |
| Halogens | Good |
| Ketones | Good |
Mechanical Properties
| Element | Value |
|---|---|
| Coefficient of friction | 0.08-0.1 |
| Hardness - Rockwell | D60-70 - Shore |
| Elongation at break( % ) | 100-300 |
| Tensile modulus( GPa ) | 1.7 |
| Izod impact strength( J m⁻¹ ) | 144 |
| Tensile strength( MPa ) | Jul-20 |
Electrical Properties
| Element | Value |
|---|---|
| Dielectric constant @1MHz | 2.2-2.35 |
| Dissipation factor @ 1kHz | 0.003 |
| Dielectric strength( kV mm⁻¹ ) | 40 |
| Surface resistivity( Ohm/sq ) | 10¹⁵ |
| Volume resistivity( Ohmcm ) | 10¹⁶ |
Physical Properties
| Element | Value |
|---|---|
| Flammability | V0 |
| Resistance to Ultra-violet | Good |
| Limiting oxygen index( % ) | 95 |
| Water absorption - over 24 hours( % ) | 0.15 |
| Density( gcm⁻³ ) | 2.25 |
Thermal Properties
| Element | Value |
|---|---|
| Upper working temperature( C ) | 260 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.33-0.42@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 75-100 |
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