G10 G11 Epoxy Laminated Insulation Sheet

G10 and G11 epoxy fiberglass laminate sheets are high-strength electrical insulation materials made from glass fiber cloth impregnated with epoxy resin and laminated under heat and pressure. They combine excellent electrical insulation, mechanical strength, dimensional stability and moisture resistance, making them widely used in electrical equipment, transformers, motors, switchgear, fixtures and structural insulation parts. 

Chengrui supplies both G10 epoxy fiberglass laminate sheet and G11 epoxy fiberglass laminate sheet and FR4 insulation sheet in different thicknesses, colors, sheet sizes and machined parts according to customer requirements. Standard sheets can be supplied directly, and custom cutting, CNC machining, drilling, milling and shape processing are available for insulation components.

G10 vs G11 Insulation Sheet

G10 epoxy fiberglass laminate sheet is a rigid laminated insulation sheet made from epoxy resin and fiberglass cloth. It is one of the most commonly used epoxy glass laminate materials for electrical insulation and mechanical support.
G11 epoxy fiberglass laminate sheet is a higher-temperature epoxy fiberglass laminate. It is also made from epoxy resin and fiberglass cloth, but compared with G10, G11 is designed for better thermal performance and improved stability under elevated temperature conditions.

G11 is often selected when the application requires:

• Higher heat resistance than G10

• Better performance at elevated temperature

• High mechanical strength

• Good electrical insulation

• Stable insulation performance

• High-temperature structural support

• Better long-term thermal reliability

  
  

Material Structure

Both G10 and G11 are epoxy fiberglass laminate sheets. Their basic structure is similar, but the resin system and performance level are different.

Epoxy resin+Fiberglass cloth+Heat and pressure lamination=Rigid epoxy fiberglass laminate sheet

G10 Material：G10 is made from epoxy resin and fiberglass cloth. It is designed as a general-purpose electrical insulation laminate with good mechanical and dielectric properties.

G11 Material：G11 is made from epoxy resin and fiberglass cloth, often using a higher-temperature resin system and specified fiberglass fabric such as 7628 fiberglass cloth. It is designed for better thermal resistance and more demanding electrical insulation applications.

Key Features of G10 and G11 Epoxy Fiberglass Sheets

1.Excellent Electrical Insulation

G10 and G11 both provide strong electrical insulation performance. They are widely used in electrical equipment where insulation reliability and mechanical support are required at the same time.

2.High Mechanical Strength

The fiberglass reinforcement gives the sheet high strength, rigidity and impact resistance. It can be used for machined insulation parts, support plates, spacers and structural components.

3.Good Moisture Resistance

Epoxy fiberglass laminate has better moisture resistance than many paper-based or phenolic insulation materials. This makes it suitable for humid environments and electrical insulation applications requiring stable performance.

4.Good Dimensional Stability

G10 and G11 sheets maintain good shape stability during machining and use. They are suitable for CNC cutting, drilling, milling and customized insulation components.

FAQ

1. Are G10 and G11 the same material?

No. Both are epoxy fiberglass laminate sheets, but G11 is designed for better heat resistance. G10 is more commonly used for general-purpose insulation and structural applications.

2. Which one has better heat resistance?

G11 has better heat resistance than G10. Based on the provided specification, G11 has a Tg of 170 ± 5°C and long-term temperature resistance above 155°C.

3. Can G10 and G11 be machined into custom parts?

Yes. Both materials can be cut, drilled, milled and CNC machined according to customer drawings or samples.

G10 and G11 epoxy fiberglass laminate sheets are reliable electrical insulation and structural materials used in transformers, motors, switchgear, electrical equipment and industrial applications.

G10 is a cost-effective general-purpose epoxy fiberglass laminate suitable for standard insulation and support parts. G11 is a higher-temperature grade suitable for applications requiring better heat resistance, higher Tg and improved long-term thermal stability.

If your project requires epoxy fiberglass laminate sheets or machined insulation parts, Chengrui can provide G10, G11, custom cutting, CNC machining and export supply according to your drawings and technical requirements.