What is MF GC 201?
MF GC 201 (Hgw 2272 acc. to DIN 7735) is a glass-fabric-reinforced melamine-resin laminate with the highest tracking resistance (CTI 600) among all laminate grades in Liedtke's range, combined with flame-retardant behaviour (UL 94 V-0) and a light, white colour. MF GC 201 (EN 60893) and Hgw 2272 (DIN 7735) designate exactly the same material – only the underlying standard differs.
Technical Data
| Property | Value | Test Standard |
|---|---|---|
| General Properties | ||
| Density | 1.8-2.0 g/cm³ | DIN 53479 |
| Water absorption (5 mm thickness) | 370 mg | DIN 53495 |
| Glow-wire resistance | 2a | DIN 53459 |
| Flammability | V-0 | UL 94 |
| Colour | white | – |
| Mechanical Properties | ||
| Flexural strength | 340 MPa (DIN 7735 minimum: 270) | DIN 53452 |
| Tensile strength | 260 MPa (DIN 7735 minimum: 120) | DIN 53455 |
| Compressive strength | 240 MPa (DIN 7735 minimum: 180) | DIN 53454 |
| Impact strength | 125 kJ/m² (DIN 7735 minimum: 50) | DIN 53453 |
| Notched impact strength | 68 kJ/m² (DIN 7735 minimum: 30) | DIN 53453 |
| Punching shear strength | 3,100 N (DIN 7735 minimum: 1,800) | DIN 53463 |
| Modulus of elasticity | 22,000 MPa (DIN 7735 minimum: 14,000) | DIN 53452 |
| Thermal Properties | ||
| Limiting temperature | 130 °C | VDE 0304 |
| Thermal conductivity | 0.3 W/(m·K) | DIN 52612 |
| Coefficient of linear expansion | 10-20 · 10⁻⁶/K | VDE 0304 |
| Thermal class | B | VDE 0534 |
| Electrical Properties | ||
| Electric strength ∥ / ⊥ | 38 / 27 kV (DIN 7735: 20/25) | DIN 53481 |
| Dissipation factor (1 MHz) | 0.04 | DIN 53483 |
| Dielectric constant | 5 | DIN 53483 |
| Comparative tracking index CTI | 600 | IEC 112 |
| Tracking/erosion behaviour | AB 2 | DIN 53489 |
MF GC 201 in detail
1What is MF GC 201?+
MF GC 201 is the EN 60893 designation for a glass-fabric-reinforced melamine-resin laminate with very high tracking resistance (CTI 600) and flame-retardant behaviour (UL 94 V-0). It is exactly the same material that the older German standard DIN 7735 designates as Hgw 2272 - both names refer to the same material. Liedtke Kunststofftechnik lists the material under both designations so it can be found regardless of which standard your documentation references.
2How does Liedtke machine MF GC 201?+
MF GC 201 machines well. Sawing, milling, drilling and turning produce clean, dimensionally accurate results with sharp, carbide-tipped or diamond-coated tools. During machining we ensure adequate dust extraction, since resin and glass-fibre dust is generated that can cause mechanical skin irritation. This is how we reliably produce tracking-resistant, flame-retardant insulating parts - from single pieces to series production.
3When should I choose MF GC 201?+
MF GC 201 pays off whenever high tracking resistance and flame retardancy are required alongside good mechanical strength, for example:
- Insulating parts with high requirements for tracking and creepage resistance (terminals, sockets, connectors)
- Switchgear and low-voltage components requiring flame retardancy (UL 94 V-0)
- Components that need both mechanical strength and electrical insulation
- Applications where a light, white surface finish is desired
- Test and measurement technology requiring dimensionally stable, tracking-resistant insulating parts
4What determines the price of an MF GC 201 part?+
MF GC 201 (Hgw 2272) is priced between standard phenolic-resin laminates and high-performance epoxy- or silicone-resin grades. The component price is determined mainly by sheet thickness, dimensions, material utilisation, machining effort and batch size. We are happy to provide binding prices on request based on your drawing.
5When is MF GC 201 not the right choice?+
MF GC 201 is not declared for direct food contact - the cotton-reinforced grade MF CC 201 (Hgw 2282.5) is the right choice for that. For applications requiring very high mechanical strength, Hgw 2372.1 is superior, and for continuous temperatures above 130 °C a silicone-resin laminate is preferable. As a thermoset, MF GC 201 also cannot be reshaped or welded, and machining causes higher tool wear and requires skin protection due to the glass fabric.
6Advantages and disadvantages of MF GC 201+
An honest assessment, and how the disadvantages can be mitigated in practice:
- Advantage: Very high tracking resistance (CTI 600)
- Advantage: Flame retardant (UL 94 V-0)
- Advantage: High mechanical strength
- Advantage: Low water absorption
- Advantage: Light, white surface
- Disadvantage: Not declared for direct food contact
- Disadvantage: Lower limiting temperature than silicone-resin laminate (Hgw 2572)
- Disadvantage: Lower mechanical strength than Hgw 2372.1
- Disadvantage: Higher tool wear during machining (glass fabric)
- Disadvantage: Higher price than standard phenolic-resin laminate
Typical Properties
- Very high tracking resistance (CTI 600)
- High mechanical strength
- Low water absorption
- Flame retardant (UL 94 V-0)
- Good electrical insulation properties
- Thermoset laminate (dimensionally stable)
- Colour white
Typical Industries
- Electrical engineering and switchgear construction
- Low-voltage insulation technology
- Mechanical and plant engineering
- Jig, fixture and tool making
- Test and measurement technology
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