Epoxy fiberglass sheets are reinforced composites made from epoxy resin and glass fibers, offering high mechanical strength, excellent electrical insulation and good thermal stability. They are widely used for FR4 and G10 sheets, electrical boards, CNC-machined parts, spacers and industrial insulation applications where moisture resistance and long service life are required.
What is an Epoxy Fiberglass Sheet?
Epoxy fiberglass sheet is a reinforced engineering composite manufactured from epoxy resin and glass fibers.
It provides a balanced combination of high mechanical strength, excellent electrical insulation, thermal stability and moisture resistance.
These sheets are commonly produced as FR4 and G10 grades and are widely used in electrical, electronic and industrial applications.
Engineering Properties of Epoxy Fiberglass Sheets
- Excellent electrical insulation: Suitable for switchboards and electrical equipment.
- High mechanical strength: Withstands pressure and structural loads.
- Good thermal stability: Reliable performance at elevated temperatures.
- Moisture resistance: No water absorption or dimensional change.
- Dimensional stability: Ideal for precision CNC machining.
- Chemical resistance: Compatible with many industrial environments.
- Long service life: Durable in demanding operating conditions.
Typical Applications of Epoxy Fiberglass Sheets
- FR4 and G10 industrial sheets
- Electrical boards and PCB applications
- Electrical insulation panels
- Industrial spacers, bushings and brackets
- Precision CNC-machined components
- Heat-resistant and moisture-resistant liners
Technical Specifications
| Property | Typical Value |
|---|---|
| Density | 1.85 – 2.0 g/cm³ |
| Electrical Insulation | Excellent |
| Tensile Strength | 250 – 350 MPa |
| Service Temperature | Up to approx. 155 °C |
| Water Absorption | < 0.2% |
| Compressive Strength | 300 – 400 MPa |
FR4 vs G10 Epoxy Fiberglass Sheets
- FR4: Flame-retardant grade, ideal for electrical and electronic applications.
- G10: Higher mechanical strength, preferred for CNC and structural components.
Frequently Asked Questions
Are epoxy fiberglass sheets suitable for electrical panels?
Yes, especially FR4 grade, which provides excellent electrical insulation.
Can epoxy fiberglass sheets be CNC machined?
Yes, their dimensional stability makes them ideal for precision CNC machining.
What is the difference between FR4 and G10 sheets?
FR4 is flame-retardant, while G10 offers higher mechanical strength for mechanical applications.
For selecting the right epoxy fiberglass sheet for your application, contact the technical team at Toseeteflon.