Overview
G11/EPGC 308 is a high-temperature epoxy glass laminate that retains its mechanical and electrical properties at elevated temperatures (TI 180°C). Used in transformers, switchgear, motors and high-temperature electrical insulation where standard FR4 is insufficient.
Grade-specific information
Available supplier grades
Each record below names the supplied grade, source and scope. Certifications, approvals, colours and forms apply only where stated for that specific grade.
ISOVAL® 11
Isovolta Group
Confirm with quotation
High-temperature epoxy glass grade for construction, electrical and thermal insulation where elevated operating temperature is combined with high mechanical strength.
- Product form
- Sheet
- Thicknesses / diameters
- 0.1–100 mm
- Formats / dimensions
- 2140 × 1040; 1040 × 1040; 2800 × 1220; 1400 × 1220; 3180 × 1040; 3180 × 1220 mm, subject to thickness
- Colour
- Green
- Surface / structure
- High-temperature glass-fabric epoxy laminate
Key technical data
- Density: approx. 2.0 g/cm³ (ISO 1183/A)
- Tensile strength: 240 MPa (ISO 527)
- Flexural modulus: approx. 24,000 MPa (ISO 178)
- Thermal endurance: TI 180 (IEC 216)
- CTI: 180 (IEC 112)
Technical-data source: ISOVAL 11 technical datasheet (Isovolta Group, 2012)
ISOVAL® 200
Isovolta Group
Confirm with quotation
Very-high-temperature epoxy glass grade for demanding construction, insulation and chemical-industry applications.
- Product form
- Sheet
- Thicknesses / diameters
- 0.2–160 mm
- Formats / dimensions
- 2140 × 1040; 2800 × 1220; 3180 × 1040; 3180 × 1220 mm, subject to thickness
- Colour
- Green
- Surface / structure
- High-temperature glass-fabric epoxy laminate; shiny surface available on request
Key technical data
- Density: approx. 2.0 g/cm³ (ISO 1183/A)
- Flexural strength: 450 / 250 / 150 MPa at 23 / 150 / 180 °C (ISO 178)
- Tensile strength: 240 MPa (ISO 527)
- Thermal endurance: TI 200 (IEC 60216)
- CTI: 180 (IEC 60112)
Technical-data source: ISOVAL 200 technical datasheet (Isovolta Group, 2022)
ISOVAL® TM
Isovolta Group
Confirm with quotation
Fine glass-fabric high-temperature grade selected where improved machinability is important alongside chemical resistance and thermal endurance.
- Product form
- Sheet
- Thicknesses / diameters
- 0.2–145 mm
- Formats / dimensions
- 1300 × 1040; 2140 × 1040; 1040 × 1040; 2800 × 1220; 1400 × 1220; 3180 × 1040; 3180 × 1220 mm, subject to thickness
- Colour
- Slight green
- Surface / structure
- Fine glass-fabric epoxy laminate
Key technical data
- Density: approx. 2.0 g/cm³ (ISO 1183/A)
- Flexural strength: 400 / 280 / 200 MPa at 23 / 120 / 150 °C (ISO 178)
- Tensile strength: 220 MPa (ISO 527)
- Thermal endurance: TI 180 (IEC 216)
Technical-data source: ISOVAL TM technical datasheet (Isovolta Group, 2012)
ISOVAL® 11 HKB
Isovolta Group
Confirm with quotation
Tracking-resistant high-temperature grade for electrical machines, switches and transformers where surface contamination and electrical strength must be considered.
- Product form
- Sheet
- Thicknesses / diameters
- 0.2–145 mm
- Formats / dimensions
- 1300 × 1040; 2140 × 1040; 1040 × 1040; 2800 × 1220; 1400 × 1220; 3180 × 1040; 3180 × 1220 mm, subject to thickness
- Colour
- Light green
- Surface / structure
- Tracking-resistant glass-fabric epoxy laminate
Key technical data
- Flexural strength: 450 / 400 / 300 MPa at 23 / 120 / 150 °C (ISO 178)
- Tensile strength: 300 MPa (ISO 527)
- CTI: 600 (IEC 112)
- Thermal endurance: TI 180 (IEC 216)
- Flammability: UL 94 V-0 at ≥10 mm; V-1 at 8–<10 mm
Technical-data source: ISOVAL 11 HKB technical datasheet (Isovolta Group, 2012)
ISOVAL® 11 PTFE
Isovolta Group
On request
ISOVAL 11 high-temperature laminate with a PTFE-covered surface for applications that require lower friction or improved chemical resistance at the surface.
- Product form
- Sheet
- Thicknesses / diameters
- 1–30 mm; standard PTFE layer 0.25 mm
- Formats / dimensions
- 2140 × 1040; 1040 × 1040; 3180 × 1040 mm
- Colour
- Green epoxy surface with light-grey PTFE surface
- Surface / structure
- PTFE foil on one side
Key technical data
- Flexural strength: 350 / 180 MPa at 23 / 150 °C (ISO 178)
- Tensile strength: 240 MPa (ISO 527)
- CTI: epoxy surface 180; PTFE surface 600 (IEC 112)
- Thermal endurance: TI 180 (IEC 216)
Technical-data source: ISOVAL 11 PTFE technical datasheet (Isovolta Group, 2012)
VOLTADUR® 11
Isovolta Group
Confirm with quotation
Grade for rotating electrical machines, including slot wedges and construction components, using a high-functional epoxy resin system.
- Product form
- Sheet
- Thicknesses / diameters
- 0.5–100 mm
- Formats / dimensions
- 2800 × 1220 mm
- Colour
- Green
- Surface / structure
- Glass-fabric epoxy laminate for rotating electrical machinery
Key technical data
- Flexural strength: 450 / 250 / 150 MPa at 23 / 150 / 180 °C (ISO 178)
- Tensile strength: 300 MPa (ISO 527)
- Compressive strength perpendicular: 600 MPa at 23 °C (ISO 604)
- Thermal endurance: TI 155 (IEC 60216)
Technical-data source: VOLTADUR 11 technical datasheet (Isovolta Group, 2013)
ISOVAL® TU 22
Isovolta Group
On request
Tube made with the temperature-resistant ISOVAL 11 resin system for mechanical strength, electrical insulation and high-temperature service.
- Product form
- Round rolled epoxy glass-fabric tube
- Thicknesses / diameters
- Outside diameter 16.5–600 mm; wall thickness depends on internal diameter, maximum 15 mm
- Formats / dimensions
- 1000 and 1200 mm lengths
- Colour
- Not specified in source document
- Surface / structure
- As produced or ground
Key technical data
- Standard: IEC 61212 EP GC 22
- Density: approx. 1.7 g/cm³ (IEC 61212)
- Flexural strength: minimum 300 MPa at 23 °C; 150 MPa at 150 °C
- Thermal endurance: TI 180 (IEC 61212)
Technical-data source: ISOVAL TU 22 technical datasheet (Isovolta Group, 2012)
Grade data is taken from the named manufacturer source. Current MaterialCut supply, final dimensions and commercial conditions are confirmed in the quotation.
Technical Properties
Generic material-family guidance. Use the named supplier-grade records above for product-specific source, dimensions, colours and technical data.
| Property |
Value |
Unit |
| Density |
1.85 |
g/cm³ |
| Tensile Strength (Yield) |
320 |
MPa |
| Flexural Strength |
400 |
MPa |
| Service Temp. Long-term |
-50 … 180 |
°C |
| Water Absorption |
8 mg (3mm) |
% |
| Flammability (UL94) |
V0 |
|
| Dielectric Strength |
20 |
kV/mm |
