Etronax MMF

Strengthened with a fine cotton tissue. Suitable for smaller construction materials where high mechanical loads and strong wear occur. Suitable for machining to fine tolerances.

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Specifications

  • Resin: Phenol
  • Reinforcement: Cotton fabric
  • Colour: Light brown

Closest relevant standards

IEC 60893:PF CC 203

NEMA LI 1:L

DIN 7735:Hgw 2083

Etronax MMF - Sheet

Etronax MMF (PF CC 203) is reinforced with a finer fabric than standard MF. This is not primarily a difference in mechanical properties; it comes down to the achievable surface finish and the tolerances that can be held after machining. It is used in particular for mechanical applications where fine tolerances and a smooth surface finish are required, such as bearing bushings for cold-bearing holders.

MMF vs. MMMF

Etronax MMF and MMMF share the same underlying logic. Both use a finer weave than standard MF to achieve tighter tolerances and a smoother surface finish after machining, not to improve mechanical properties. MMMF uses an even finer weave than MMF. The choice between MMF and MMMF comes down to part size and how demanding the tolerances are. Smaller, faster-rotating parts call for MMMF's finer weave, while MMF is sufficient where the tolerance and surface-finish requirements are somewhat less strict. The two also conform to different sheet standards: MMF meets PF CC 203, while MMMF meets PF CC 305.

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Properties

Friction-reducing

Suitable for components where frictional and rolling resistance may occur.

Easy to machine

The easy-to-machine material makes for unlimited possibilities.

Durable

Resistant material with long service life.

Low density

The compact structure of the material optimises its mechanical and electrotechnical properties.

Overview

Mechanical properties
Bending strength at RT ISO 178 ≥ 1,5 mm 130 MPa *1
Bending strength at a high temperature ISO 178 ≥ 1,5 mm MPa *
Modulus of elasticity ISO 178 ≥ 1,5 mm 7000 MPa *1
Compressive strength ISO 604 ≥ 5 mm 280 MPa *1
Izod impact strength, parallel with layers ISO 180/2A ≥ 5 mm 10 Kj/m2 *1
Shearing strength, parallel IEC 60893-2 ≥ 5 mm 50 MPa *1
Tensile strength ISO 527 ≥ 1,6 mm 100 MPa *1
Electrical properties
Electrical strength in oil at 90°C, perpendicular IEC 60243-1 3 mm 2 kV/mm *2
Electrical strength in oil at 90°C, parallel IEC 60243-1 ≥ 3 mm 12 kV/25mm *2
Permitivity 50 MHz IEC 62631-2-1 ≤ 3 mm *
Permitivity 1 MHz IEC 62631-2-1 ≤ 3 mm *
Dissipation factor 50 MHz IEC 62631-2-1 ≤ 3 mm *
Dissipation factor 1 MHz IEC 62631-2-1 ≤ 3 mm *
Insulation resistance after submersion in water IEC 62631-3-3 All 1 MΩ *4
Comparative tracking index IEC 60112 ≥ 3 mm 100 CTI *1
Physical and thermal properties
Temperature index 20,000 h (T.I.) IEC 60216 ≥ 3 mm 100 °C *
Fire class IEC 60695-11-10 *
Density ISO 1183-A All 1.35 g/cm³ *
Water absorption ISO 62-1 50x50x3 mm 100 mg *
Smoke emission & toxicity EN 45545-2; R22, R23 & R24 *
Oxygen Index (OI) EN ISO 4589-2 %
Smoke density (Ds max.) EN ISO 5659-2 *
Smoke density (Ds max.) EN ISO 5659-2 *
Toxicity (CITNLP) NF X 70-100-1/-2 *
Toxicity (CITG, 8 min) EN 17084 *

Conditioning

1 24h/23°C/50%RH
2 24h/23°C/50%RH + 1h/ in oil at 90°C
4 24h/50°C/<20% RH + 24h in water at 23°C

The above values are average values resulting from extensive tests in our laboratories. ELEKTRO-ISOLA A/S disclaims any and all liability for the performance of our materials in applications outside our control. Elektro-Isola A/S reserves the right to modify the above data without notice or further information. Furthermore, we refer to our general disclaimer.

* Note that color and surface are indicative. As this is a technical product, colour and expression may vary according to dimensions, batches and machining. If you want further information or have special decorative needs, please feel free to contact us.