DIN EN 60371-3-6
Requirements for flexible mica paper reinforced with glass fabric and impregnated with B-stage epoxy resin.
Glass-backed mica paper
Requirements for flexible mica paper reinforced with glass fabric and impregnated with B-stage epoxy resin.
Data edition: DIN EN 60371-3-6:2007-07
Material requirements. Defined by product form.
Requirements for flexible mica paper reinforced with glass fabric and impregnated with B-stage epoxy resin.
Technical text: EN 60371-3-6:1995 with A1:2006. These requirements apply to the specified electrical-insulation laminate construction, not to every mica sheet or spiral-wound filler. Glass, mica and resin proportions depend on the selected product type.
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1 material references with DIN EN 60371-3-6 data.
DIN EN 60371-3-6 properties
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| Grade / designation | Mica component | Reinforcement | Binder | Delivery form | Nominal thickness (mm) | Composition by product type | Volatile content, max (%) |
|---|---|---|---|---|---|---|---|
| Mica Glass-backed mica paper | Muscovite or phlogopite paper | Glass fabric | Epoxy resin, supplied in B-stage | Flexible sheets or rolls | 0.09–0.28 | Mica, glass and resin mass per unit area: Tables 1 and 2 | 1.0 |
Composition is specified by constituent mass per unit area, not elemental percentages. Exact type-specific masses and tolerances are in Tables 1 and 2; no single formulation is assigned to the general Mica grade.
| Grade / designation | Property | Requirement | Unit | Condition |
|---|---|---|---|---|
| Mica Glass-backed mica paper | Tensile strength — warp / weft | ≥80 / ≥20 | N/10 mm | As received; glass fabric 23 g/m² |
| Mica Glass-backed mica paper | Tensile strength — warp / weft | ≥140 / ≥30 | N/10 mm | As received; glass fabric 32 or 43 g/m² |
| Mica Glass-backed mica paper | Flexural strength | ≥150 | MPa | After curing; 23 ±2 °C |
| Mica Glass-backed mica paper | Flexural strength | ≥100 | MPa | After curing; 155 ±5 °C |
| Mica Glass-backed mica paper | Elastic modulus | ≥30 | GPa | After curing |
| Mica Glass-backed mica paper | Density | 1.8–2.2 | g/cm³ | After curing |
| Mica Glass-backed mica paper | Resin flow | 40–70 | % | 160 ±2 °C |
| Mica Glass-backed mica paper | Stiffness | — | — | As agreed; tested using IEC 60371-2 |
Tensile values are force per 10 mm width, not MPa. Warp and weft values must be read separately. Cured properties apply after the specified specimen preparation; — means an agreed requirement rather than a universal numerical limit.
Specification source
Technical data above is identified by its source edition: DIN EN 60371-3-6:2007-07.