FR4 Honeycomb Panels
FR4 Sheet + Polypropylene Honeycomb
FR4 Honeycomb Panels combine the benefits of FR4 (Epoxy Fiberglass Laminate) and Polypropylene (PP) to create a lightweight, strong, and durable material.
Product Features
- Lightweight: The honeycomb structure reduces weight while maintaining strength.
- High Strength-to-Weight Ratio: Ideal for applications that require strength and reduced weight.
- Chemical Resistance: FR4 has good resistance to many chemicals, making it suitable for a variety of environments.
Specifications
| Facing | FR4 sheet. (Thickness: 0.7-5.0mm) |
| Surface Color | White, translucent green. |
| Core | PP (Polypropylene ) Honeycomb. (Density: 80-120kg/m³) |
| Composite Method | Adhesive. |
| Thickness | 10-50mm. |
| Size | 1220 x 2440mm or Customized. |
Structural Diagram
What is FR4 material?
FR4 is an insulating composite material composed of woven fiberglass, epoxy resin, and various additives. The “FR” in its name stands for “Flame Retardant,” and the “4” is a specific grade number established by the National Electrical Manufacturers Association (NEMA), signifying that the material meets stringent standards for flame retardancy and mechanical properties.
Key Performance Parameters of FR4
| Performance | Value |
| Volume Resistivity | ≥10¹⁴ Ω·cm |
| Dielectric Constant (1MHz) | 3.8-4.8 |
| Dielectric Strength | ≥15kV/mm |
| Flexural Strength | ≥400MPa |
| Impact Strength | ≥20kJ/m² |
| Glass Transition Temperature (Tg): | 120-180℃ |
| Coefficient of Thermal Expansion (CTE): | 10-20ppm/℃ |
| Flame Retardancy | UL94 V-0 Rating |
High Modulus Polypropylene Honeycomb
Polypropylene honeycomb is a lightweight, waterproof, strong thermoplastic designed based on the bionic principle of honeycomb. It is ideal for use as the core material in lightweight sandwich panel structures.
Common Performance Parameters of Polypropylene Honeycomb Core
| Cell size(mm) | 8 | 10 | 12 |
| Density(kg/m³) | 80 | 75 | 70 |
| Compressive Strength(MPa) | 1.66 | 1.58 | 1.47 |
| Compressive Modulus(MPa) | 45.7 | 41.2 | 38.9 |
| Shear Modulus(MPa) | 0.50 | 0.45 | 0.40 |
| Operating Temperature(℃） | -40-80 | -40-80 | -40-80 |
| Thermal insulation U value | 2.2 | 2.2 | 2.2 |
Application of FR4 Honeycomb Panels
FR4 Honeycomb Panels can be used in various industries such as energy, sports, electronics, aviation, etc. Such as：
- Pickleball paddles and practice boards.
- Portable ping pong tables.
- Solar back panels.
- Insulation of electronic devices, etc.
