What Is G10 Epoxy Resin Laminate Sheet?
G10 epoxy resin laminate sheet is a high‐performance composite material made from woven glass cloth saturated with epoxy resin, cured under heat and pressure to form rigid, dimensionally stable sheets. Sometimes known simply as G10 glass epoxy laminate, or “fiberglass epoxy sheet G10”, this material has been widely used in electrical insulation, mechanical applications, and industrial components due to its unique combination of strength, chemical resistance, and insulation properties.
Composition & Manufacturing Process
The base is woven fiberglass fabric (glass cloth), which is strong, low‐weight, and provides the structural reinforcement.
The fiberglass fabric is impregnated (“prepreg” or saturated) with epoxy resin, which when cured binds the layers together into a solid, thermoset laminate.
Under high heat and pressure, multiple layers are stacked and cured to produce sheets of various thicknesses. The lamination process ensures dimensional stability under thermal stress and low moisture absorption.
Key Properties and Performance of G10 Laminate Sheets
Here are the important physical, electrical, thermal, and chemical properties that make G10 epoxy laminate sheet valuable in demanding applications:
| Property | Typical Performance / What It Means |
|---|---|
| Mechanical strength | High tensile, flexural, compressive strength; resists deformation under load. |
| Dielectric/electrical insulation | Excellent electrical insulating ability (high dielectric strength), works well even in humid or wet environments. |
| Thermal resistance | Useful up to ~130-140 °C in many grades; performance degrades if used constantly above rated temperature. |
| Moisture absorption | Low water absorption; important in humid or contact with moisture situations. |
| Chemical resistance | Resistant to many chemicals, acids, alkalis, and solvents. Helps in harsh or industrial environments. |
| Dimensional stability | Maintains shape, size, and tolerances over changes in temperature, humidity, and mechanical load. |
Variants, Standards & Comparisons
G10 vs FR-4: FR‐4 is similar in composition (glass cloth + epoxy resin) but includes flame retardant additives; it meets UL94V-0 flame retardancy requirements. G10 is non‐FR unless specifically treated.
flame retardant grades (G10/FR4): Some manufacturers offer G10 laminate sheets that also meet FR4 or flame retardant specs. These are suitable for applications where fire safety is required.G10 vs G11: G11 offers higher temperature resistance than standard G10, though sometimes at cost of other mechanical properties.
Applications: Where G10 Epoxy Laminate Sheet Is Used
Because of its combination of properties, G10 epoxy laminate sheet is used in:
Electrical insulation (terminal boards, switchgear, bus bars).
Printed circuit boards (PCBs) and insulating substrates.
Aerospace, marine, oil & gas: structural parts, insulation in harsh, humid, corrosive, or high temperature environments.
Mechanical fixtures, jigs, supports, shields, etc., where strength, durability, and dimensional stability are needed.
Limitations & What To Consider
While G10 has many useful properties, there are considerations to keep in mind:
Temperature ceiling: Though good up to ~130-140 °C, prolonged exposure above that can degrade epoxy properties.
Machinability: Cutting, drilling, milling can produce glass fibre dust; requires proper tooling and safety precautions. Also, because of its hardness and glass reinforcement, machining wear on tools is higher.
Cost: Has higher cost than simpler phenolic laminates or basic epoxy boards. However, its longer service life and superior performance often justify the investment.
Why SENKEDA G10 Epoxy Laminate Sheet Is a Good Choice
If you’re evaluating suppliers of G10 epoxy laminate sheets, SENKEDA offers products with the following advantages:
Quality manufacture: Sheets produced under controlled conditions (proper layering, epoxy resin curing under heat & pressure) to achieve tight tolerances, consistent mechanical and electrical properties.
Variety of sizes and grades: SENKEDA provides different thicknesses, possibly flame retardant variants and customizable dimensions to suit various applications — from electrical insulation to mechanical structural parts.
Performance reliability: Low moisture absorption, good dielectric strength, chemical resistance, and dimensional stability under thermal stress, making SENKEDA’s G10 sheets well suited for demanding industrial environments.
Support & custom solutions: For specialized needs (e.g. non-standard thickness, or specific electrical insulation requirements), SENKEDA seems able to provide qualified advice and supply accordingly.
Summary
G10 epoxy resin laminate sheet (also called G10 glass epoxy laminate) is a high-pressure, high-performance composite made from woven fiberglass and epoxy resin. It offers a powerful mix of mechanical strength, electrical insulation, moisture and chemical resistance, and thermal stability. When selecting a G10 sheet, consider your required temperature range, mechanical load, moisture exposure, and whether you need flame retardancy (or FR4 variants). Suppliers like SENKEDA can offer custom, reliable G10 laminate sheets appropriate for such demanding applications.
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