G10 fiberglass laminate is a high-performance thermoset material engineered for demanding electrical and mechanical applications. With its unique balance of strength, insulation, and durability, G10 has become a go-to material across multiple industries. Whether you're an engineer specifying materials for electrical enclosures or a purchaser sourcing reliable sheet stock, this guide covers everything you need to know about G10 fiberglass laminate.
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What Is G10 Fiberglass Laminate?
G10 is a fiberglass-reinforced epoxy laminate made by stacking layers of woven glass cloth soaked in epoxy resin, then compressing them under heat and pressure. The result is a rigid, tough material with excellent electrical insulating properties and mechanical strength.
Key Properties of G10:
High dielectric strength
Excellent mechanical durability
Moisture resistance
Chemical resistance
Dimensional stability under heat and pressure
Flame retardant variants (G10/FR4)
This combination makes G10 ideal for applications that require both structural performance and electrical insulation.
Top Applications for G10 Sheet
G10’s unique material properties make it suitable for a wide range of industries and applications:
1. Electrical Insualtion
- Circuit board backers
- Switchgear and power equipment
- Bus bar insulation
- Arc shields
2. Aerospace and Defense
- Lightweight structural components
- Thermal and electrical isolation in aircraft systems
3. Industrial Equipment
- Gaskets and washers
- Load-bearing support panels
- Custom-machined parts
4. Oil and Gas
- Downhole insulation
- Tool insulation in high-heat, high-pressure environments
5. Transportation
- Battery enclosures
- High-voltage component protection
- Vibration-resistant structural panels
G10 vs. FR4: A Common Comparison
Choose G10 if:
Choose FR4 if:
G10 vs. Phenolic Materials: What’s the Difference?
While phenolic laminates and G10 are both used in electrical and industrial applications, they differ significantly in performance and composition.
| Feature | G10 Fiberglass Laminate | Phenolic Laminates |
|---|---|---|
| Reinforcement | Woven fiberglass | Paper, cotton, or glass cloth |
| Resin Type | Epoxy | Phenolic |
| Electrical Insulation | Excellent | Moderate to high (depending on type) |
| Moisture Resistance | High | Moderate |
| Mechanical Strength | High | Moderate to high |
| Machinability | Excellent | Good |
| Cost | Higher | Lower |
Bottom Line:
Phenolic materials may be more cost-effective for basic mechanical applications, but G10 offers superior strength, moisture resistance, and electrical insulation, making it the better choice for high-performance environments.
Common Sheet Sizes and Specifications
G10 fiberglass sheets are typically available in:
Thicknesses: From 0.010” up to 2.00”
Sheet Sizes: 36” x 48”, 48” x 96”, and custom-cut sizes
Color: Most commonly green or yellow-green
These sheets can be machined, milled, drilled, and laser cut to fit custom specifications. Piedmont Plastics offers cut-to-size services to ensure fast, precise fabrication.
Why Engineers and Purchasers Choose G10
G10 is more than just a strong plastic. It's a proven solution for engineers who need reliability in the field and for purchasers who demand consistency in quality and supply.
Benefits at a Glance:
Long-term performance in harsh environments
Easy to machine for custom components
Ideal for insulating, supporting, and protecting electrical systems
Readily available in various thicknesses and sheet sizes
G10 Fiberglass Laminate at Piedmont Plastics
At Piedmont Plastics, we carry a wide selection of G10 fiberglass sheet in standard and custom sizes. Our nationwide branch network ensures fast delivery, and our experienced team provides support for applications, material selection, and value-added services, including cut-to-size and fabrication.
We Offer:
A wide range of G10 thicknesses and grades
Precision fabrication and CNC cutting
Technical support for application-specific needs
Alternative materials like FR4 and phenolic sheet, if G10 is over-specified
Let’s Talk G10 Solutions
Need high-performance electrical insulation or custom-machined G10 components? Piedmont Plastics is your trusted source. With expert support and flexible distribution, we make it easy to get the G10 solutions you need, delivered on time and cut to spec.
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