Mica · DIN EN 60371-3-6
Mica is presented here as Glass-backed mica paper / B-stage epoxy (Glass-backed mica paper) under 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 / B-stage epoxy
Designation: Glass-backed mica paper
Data edition: DIN EN 60371-3-6:2007-07
Mica Glass-backed mica paper
Mica is presented here as Glass-backed mica paper / B-stage epoxy (Glass-backed mica paper) under DIN EN 60371-3-6. 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.
Related grades
1 material references with DIN EN 60371-3-6 data.
Mica properties
Select a table to compare requirements.
| Requirement | Requirement |
|---|---|
| Mica component | Muscovite or phlogopite paper |
| Reinforcement | Glass fabric |
| Binder | Epoxy resin, supplied in B-stage |
| Delivery form | Flexible sheets or rolls |
| Nominal thickness (mm) | 0.09–0.28 |
| Composition by product type | Mica, glass and resin mass per unit area: Tables 1 and 2 |
| Volatile content, max (%) | 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.
| Property | Requirement | Unit | Condition |
|---|---|---|---|
| Tensile strength — warp / weft | ≥80 / ≥20 | N/10 mm | As received; glass fabric 23 g/m² |
| Tensile strength — warp / weft | ≥140 / ≥30 | N/10 mm | As received; glass fabric 32 or 43 g/m² |
| Flexural strength | ≥150 | MPa | After curing; 23 ±2 °C |
| Flexural strength | ≥100 | MPa | After curing; 155 ±5 °C |
| Elastic modulus | ≥30 | GPa | After curing |
| Density | 1.8–2.2 | g/cm³ | After curing |
| Resin flow | 40–70 | % | 160 ±2 °C |
| 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.