Hangzhou Holycore Composite Material Co., Ltd. is one of the most reliable manufacturers and suppliers of fr4 sheet in China. Please feel free to buy custom fr4 sheet made in China here from our factory. If you have any enquiry about quotation, please feel free to email us.
What is FR4 Sheet?
FR4 Sheet is an insulating laminate made of glass fiber cloth reinforced with epoxy resin and laminated under high temperature and high pressure.
FR stands for Flame Retardant, and the number "4" indicates that this grade of material meets the UL94 V-0 flame retardancy standard.
It is a lightweight, high-strength composite material with excellent electrical insulation properties, and is widely used in the electronics, electrical, and mechanical fields.
Features of FR4 Sheet provided by Holycore
Excellent flame retardancy
Complies with UL94 V-0 standards, ensuring flame resistance and safety.
Excellent electrical insulation performance
Stable dielectric constant and high breakdown voltage, suitable for high-voltage and high-frequency electrical environments.
High mechanical strength
Excellent bending and tensile strength, maintaining long-term structural stability.
Heat and chemical resistance
Suitable for stable operation in environments ranging from -40°C to +130°C, with excellent resistance to acids, alkalis, and solvents.
High machinability
Supports a variety of machining methods, including cutting, drilling, milling, and stamping.
Applications
PCB substrates
Core substrate materials for electronic products
Aerospace and rail transportation
Lightweight insulation materials
Industrial equipment
Thermal insulation panels, insulation boards, and support components
FR4 Sheet Parameter Comparison
| Performance indicators | FR4 Sheet | Standard epoxy board | Phenolic Laminate |
|---|---|---|---|
| Flame retardancy | UL94 V-0 | UL94 HB | UL94 V-0 |
| Electrical insulation performance | Excellent (High Frequency Stability) | Fair | Good |
| Mechanical strength | High | Medium | Medium |
| Temperature range | -40°C to +130°C | -30℃ ~ +100℃ | -40℃ ~ +120℃ |
| Processing performance | Good | Good | Fair |
| Cost level | Medium | Low | Medium |
Holycore's FR4 Sheet Service Advantages
- Customizable: Supports various thicknesses (0.2mm–50mm), sizes (up to 1220×2440mm), and colors.
- Testing and Compliance: Complies with international certifications such as RoHS and UL.
- Fast Delivery: Large-scale production capacity ensures timely delivery.
- Global Supply: Covers clients across multiple industries, including electronics, machinery, and electrical.
FAQ
Q1: What are the common thicknesses of FR4 sheets?
A1: Common thicknesses range from 0.2mm to 50mm, and can be customized based on customer project requirements.
Q2: Can FR4 sheets withstand high temperatures?
A2: Standard FR4 can withstand temperatures up to 130°C. Modified FR4 is available for higher temperature requirements.
Q3: What is the difference between FR4 and G10?
A3: FR4 is G10 with enhanced flame retardancy, meeting the UL94 V-0 standard and offering increased safety.
Q4: Does Holycore support small-batch customization?
A4: Yes. We offer flexible arrangements, from sampling to mass production, to meet customer R&D and production needs.
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