Overview
PF CC 202 (Hgw 2082.5 acc. DIN 7735, acc. EN 60893) belongs to the family of fabric-based laminates (industrial laminates): fabric webs are impregnated with a thermoset resin and pressed under heat and pressure into sheets, rods or tubes. In PF CC 202, the reinforcing material is a cotton fabric and the bonding resin is a phenol-formaldehyde resin. Compared with paper-reinforced phenolic laminates, the fabric reinforcement gives the material higher toughness and cleavage strength. Unlike thermoplastics, the cured thermoset does not melt but remains dimensionally stable, hard and mechanically resilient. The colour is typically brown.
Within the fabric-laminate family according to DIN 7735 / EN 60893, PF CC 202 belongs to the high-voltage-resistant cotton fabric grades: solid mechanical values combined with good electrical insulation at higher dielectric strength. The neighbouring grade PF CC 204 is reinforced with fine cotton fabric, achieving higher tensile strength and reduced water absorption. For applications with classic high-voltage requirements and good toughness, PF CC 202 is the proven choice.
Typical applications include high-voltage-resistant insulating and partition parts in switchgear construction, components with increased toughness and cleavage-strength requirements, insulating parts in transformer and motor manufacturing, and mechanically resilient structural parts with an electrical insulation function in general mechanical engineering and jig, fixture and tool making.
Technical Data
| Property | Value | Test Standard |
|---|---|---|
| Mechanical Properties | ||
| Flexural strength | 145 (DIN 7735: 115) MPa | DIN 53452 |
| Impact strength | 30 (DIN 7735: 20) kJ/m² | DIN 53453 |
| Notched impact strength | 20 (DIN 7735: 15) kJ/m² | DIN 53453 |
| Tensile strength | 100 (DIN 7735: 60) MPa | DIN 53455 |
| Compressive strength | 190 (DIN 7735: 150) MPa | DIN 53454 |
| Cleavage strength | 3800 (DIN 7735: 2500) N | DIN 53463 |
| Modulus of elasticity | 8 · 10³ (DIN 7735: 7 · 10³) MPa | DIN 53452 |
| Electrical Properties | ||
| Insulation resistance | 5 · 10⁷ (DIN 7735: 10⁷) Ω | DIN 53482 |
| Electric strength ∥ / ⊥ | 25 / 12 (DIN 7735: 20 / 5) kV | DIN 53481 |
| Permittivity | 5 | DIN 53483 |
| Comparative tracking index (CTI) | 100-160 | IEC 112 |
| Thermal Properties | ||
| Limiting temperature | 110 °C | VDE 0304 T.21 |
| Thermal conductivity | 0.2 W/(m·K) | DIN 52612 |
| Coefficient of linear expansion | 20-40 · 10⁻⁶ /K | VDE 0304 |
| Thermal class | E | VDE 0534 |
| Resistance to glowing | 2b | DIN 53459 |
| General Properties | ||
| Density | 1.3-1.4 g/cm³ | DIN 53479 |
| Water absorption (5 mm thickness) | 130 mg | DIN 53495 |
| Colour | brown | – |
Frequently Asked Questions about PF CC 202
1What is PF CC 202?+
PF CC 202 (Hgw 2082.5 acc. DIN 7735, acc. EN 60893) is a cotton-fabric-reinforced phenolic laminate for high-voltage-resistant applications. Compared with paper-reinforced phenolic laminates, the fabric reinforcement provides higher toughness and cleavage strength combined with good electrical insulation.
2How does Liedtke machine PF CC 202?+
We machine PF CC 202 into precision parts from sheets, rods or tubes. Sawing, milling, drilling and turning can be carried out cleanly and accurately with sharp, carbide-tipped tools. We ensure adequate dust extraction during machining, as resin and fabric dust is generated.
3What determines the price of a PF CC 202 part?+
Due to the fabric reinforcement, PF CC 202 is priced above comparable paper-reinforced phenolic laminates. Component price is mainly determined by sheet thickness or rod diameter, dimensions, material utilisation (offcuts), machining effort and batch size. We are happy to provide binding prices on request based on your drawing.
4When is PF CC 202 not the right choice?+
PF CC 202 is not declared suitable for direct food contact. PF CC 204 is the better choice for particularly high tensile strength or particularly low water absorption, and a simpler phenolic paper laminate is sufficient for economical standard applications without a high-voltage requirement. The material is unsuitable for continuous use above approx. 110 °C or in damp environments, as the fabric reinforcement is hygroscopic.
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