FR4/G10 Epoxy Glass Sheet/Tube/Rod

Description

Composition & Manufacturing

Both FR4 and G10 are engineered thermosetting industrial laminates (NEMA LI-1 grades) composed of:

Reinforcement: Continuous alkali-free glass fiber cloth (E-glass) providing exceptional mechanical durability
Resin System: High-purity epoxy resin binder ensuring chemical resistance, dimensional stability, and superior dielectric properties
FR4 Additive: Flame retardant system achieving UL94V-0 self-extinguishing classification

The manufacturing process involves vacuum impregnation of glass fabric with epoxy resin, followed by staged curing at 150-180°C under >5 MPa pressure, producing a dense, void-free composite with extremely low water absorption (≤0.15%)

Key Performance Characteristics

Property	G10 (EPGC201)	FR4 (EPGC202)
Flame Retardancy	HB Rating	UL94V-0 Certified
Mechanical Strength	Superior at high temps	Excellent (up to 130°C continuous)
Water Absorption	<0.8% (0.15% typical)	<0.8% (0.15% typical)
Dielectric Strength	>16 kV/mm (in oil)	>16 kV/mm (in oil)
Thermal Class	F-Class (155°C)	F-Class (155°C), B-Class (130°C) option
Certifications	IEC EPGC201	IEC EPGC202, UL94V-0, ISO9001

Material Advantages

Exceptional Mechanical Strength: Flexural strength >415 MPa (lengthwise) and >315 MPa (crosswise) with impact resistance suitable for aerospace and heavy equipment
Superior Electrical Insulation: Volume resistivity >10⁶ MΩ·cm (actual 2.0×10⁸) and surface resistivity >10⁴ MΩ (actual 2.0×10⁶) even after humidity conditioning
Thermal Stability: Glass transition temperature (Tg) ≥125°C (typical 135°C) withstanding 288°C solder float for 10 seconds without delamination
Chemical Resistance: Impermeable to water, oils, and most chemical solvents; resists acids and alkalis
Low Moisture Absorption: Critical for marine and high-humidity environments, preventing degradation of electrical and mechanical properties
Precision Machinability: Excellent dimensional stability with <2% shrinkage allows CNC machining to tight tolerances for intricate insulating components

3. Technical Data Tables

International Standard		IEC60893	EPGC 201	EPGC202
		DIN 7735	Hgw2372	Hgw2372.1
		NEMA	G10	FR4
Properties		Unit	Value	Value
Physical	Density	g/cm3	1.9-2.1	1.9-2.1
properties	Colour	/	Green	Yellow/Green
Mechanical properties	Water absorption	％	0.07-0.16	0.07-0.16
	Flexural Strength	Mpa	385-490	385-490
	Flexural Strength	Mpa	33	33
	Impact Strength	KJ/M2	110	110
	Rockwell Hardness	M	280-330	280-330
	Compressive	Mpa	180-230	180-230
	Strength	Mpa	≥14	≥14
ElectricalProperties	Electrical	KV/mm	40	40
	Strength	KV	≥1011	≥1011
	Volume Resistivity	Ω.cm	≥1010	≥1010
	Volume Resistivity	Ω.cm	≥1010	≥1010
	Surface Resistivity	Ω	≥1010	≥1010
	Surface Resistivity	Ω	4.0-5.0	4.0-5.0
	Dielectric Constant	/	4.0-5.5	4.0-5.5
	1MHz	/	0.03-0.04	0.03-0.04
	Disspation Factor	/	0.04-0.05	0.04-0.05
	1MHz	/	130-140	130-140
	Arc Resisitance	Sec	HB	V-0
Flame Resistance	UL Subject 94	/	1	1
	Smoke Density 90	/	Low	Low
	Toxicant Content	/	30(ok)	30(ok)
Others	Acetone Resisitance	Min	Good	Good
Others	Punchability( 3mm)	/	/	/

Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.

4. Application Scenarios

Electronics & Electrical Industry

PCB Support & Fixtures: Drilling backup boards, test fixtures, ICT test jigs (especially <3mm thickness for flexible PCB processing)
Transformers & Motors: Insulation spacers, wedges, slot liners, end plates, and structural components in oil-filled transformers
Switchgear & Busbar: High-voltage insulation barriers, phase separators, arc shields (rated up to 40kV+)
Power Inverters & Converters: Thermal-stable mounting bases for high-power semiconductor devices

Aerospace & Defense

Aircraft Interiors: Non-flammable structural panels meeting FAA fire safety requirements (FR4 UL94V-0)
Avionics: Precision-machined insulation components for radar and communication systems
Unmanned Systems: Lightweight, high-strength structural frames with electrical isolation

Industrial Manufacturing

Chemical Processing: Pump impellers, valve seats, and gaskets resistant to corrosive fluids and solvents
Heavy Machinery: Gear blanks, bearing retainers, wear pads, and machine base plates
Injection Molding: Insulating platen supports and thermal barriers for plastic molding machines
Automotive: Battery pack insulation, motor controller housings, high-voltage connectors

Marine & Offshore

Shipboard Electrical: Humidity-resistant terminal boards and switch panels for salt-air environments
Subsea Equipment: Pressure-resistant insulation for ROVs and underwater sensor housings
Wind Energy: Generator insulation components and nacelle structural supports

New Energy & HV Systems

Solar Inverters: High-CTI (210V) insulation for DC/AC conversion systems
EV Charging: Fire-retardant barriers in fast-charging stations
Battery Energy Storage: Cell separators and module insulation with thermal runaway protection

5. Frequently Asked Questions (FAQs)

Q: What is the main difference between G10 and FR4?

A: G10 (EPGC201) provides superior mechanical strength and is ideal for structural applications. FR4 (EPGC202) contains flame retardant additives achieving UL94V-0 certification, making it mandatory for most electrical/electronic applications where fire safety is required. Both share identical base composition and moisture resistance

Q: Can FR4/G10 be used in high-humidity environments?

A: Yes. Both materials exhibit extremely low water absorption (≤0.15% typical) and maintain dielectric strength and insulation resistance even after prolonged exposure to 35°C/90%RH conditions per IEC test methods . This makes them excellent for marine, tropical, and chemical processing applications.

Q: What machining tolerances can you achieve?

A: Standard tolerance is ±0.1mm. For precision applications like test fixtures and aerospace components, we achieve ±0.05mm via CNC milling/routing. Provide CAD files (DXF, STEP) for custom parts. Minimum order quantities apply for custom sizes

Q: Is your FR4 certified to UL94V-0?

A: Yes. Our FR4 grade carries UL94V-0 flame retardant certification and is traceable to batch-specific test reports. This ensures self-extinguishing within 10 seconds with no flaming drips, critical for PCB and electrical cabinet applications

Q: What is the maximum continuous operating temperature?

A: Both G10 and FR4 are rated for F-Class (155°C) continuous operation. Short-term excursions up to 180°C are permissible. For applications above 180°C, consider G11 (EPGC203) or polyimide alternatives. Thermal class B (130°C) is also available

Q: Do you provide samples? What is the lead time?

A: Yes. We provide free samples (up to A4 size) with courier charges to be paid by customer. Samples are prepared within 3 working days. Typical delivery time for bulk orders is 5-20 working days depending on quantity and customization

Q: What bonding adhesives are compatible with FR4/G10?

A: Epoxy-based adhesives provide the best bond strength (>3600N). Cyanoacrylates and structural acrylics also work well. Avoid solvent-based adhesives that may cause swelling. Surface abrasion before bonding is recommended.

Q: Can the material be used in transformer oil?

A: Absolutely. Our laminates maintain excellent dielectric properties in transformer oil at 90±2°C. Dielectric strength perpendicular to laminations exceeds 16 kV/mm in oil immersion tests per IEC 60243

6. Quality & Testing Standards

International Standards Compliance

NEMA LI-1: G10/FR4 grades meet National Electrical Manufacturers Association standards
IEC 61212: Industrial rigid round laminated tubes and rods based on thermosetting resins
UL94: FR4 certified V-0 flame retardant rating (sample self-extinguishes within 10 seconds)
IPC-4101E: Specification for base materials for rigid and multilayer printed boards
MIL-I-24768/2 & /27: Military specifications for G10 and FR4 respectively

Quality Assurance

**ISO 9001:**2015 certified manufacturing facility
RoHS & REACH: Compliant for environmental safety
Lot Traceability: Every batch with test certificates for critical parameters
Incoming Inspection: Glass cloth tensile strength, resin viscosity, and catalysis ratio
In-Process Control: Curing temperature/pressure monitoring, thickness tolerance checks
Final Testing: 100% visual inspection for delamination, voids, and surface defects; electrical testing per IEC standards on random samples

Thermal Stress Testing

All FR4 products pass IPC-TM-650 2.4.13.1 solder float test: 10 seconds at 288°C with no delamination, blistering, or measling