When electrical insulation performance is a must — but FR4 is overkill for your budget — phenolic paper laminate (Bakelite sheet) is the industry’s go-to choice. Rigid, machinable, and reliably insulating, it’s trusted worldwide for switchgear components, PCB drilling backup boards, industrial fixtures, and mechanical support structures. Available in custom sizes and thicknesses, with CNC machining service.
What is Phenolic Paper Laminate?
Phenolic Paper Laminate Sheet (PFCP 201), commonly known as Bakelite Sheet, is a rigid thermoset composite material manufactured by impregnating cellulose paper with phenolic resin and laminating it under high temperature and pressure.
The material combines:
• Electrical insulation
• Mechanical strength
• Heat resistance
• Easy machining
• Low manufacturing cost
making it one of the most widely used industrial insulation materials worldwide.
Compared with fiberglass laminates such as FR4 and G10, phenolic paper laminate provides a more economical solution for applications where ultra-high electrical performance is not required.
Why Choose Phenolic Paper Laminate?
• Excellent Electrical Insulation
High dielectric strength and insulation resistance make it suitable for electrical equipment and insulation structures.
• Cost-Effective Alternative to FR4
Provides reliable insulation and mechanical properties at a significantly lower material cost.
• Easy CNC Machining
Can be drilled, milled, routed, punched, and fabricated into complex shapes with clean edges.
• Good Mechanical Strength
Rigid and dimensionally stable under normal industrial loads.
• Heat Resistant
Continuous operating temperature up to 120°C with short-term exposure up to 140°C.
• Oil and Chemical Resistant
Maintains performance when exposed to industrial oils and common chemicals.
Typical Applications of Phenolic Paper Laminate
• Electrical Insulation Components
Terminal boards
Switch bases
Busbar barriers
Transformer insulation parts
Electrical panels
• PCB Manufacturing
PCB drilling backup boards
Routing support boards
Assembly fixtures
Soldering jigs
• Industrial Fixtures & Tooling
CNC jigs
Positioning fixtures
Assembly tooling
Inspection fixtures
• Mechanical Components
Spacer plates
Wear pads
Support plates
Structural components
• Thermal Insulation Parts
Oven insulation panels
Heating equipment spacers
Furnace insulation supports
Custom Machined Phenolic Parts
Beyond supplying sheets, we manufacture precision-machined phenolic components according to customer drawings.
Capabilities include:
CNC Milling
CNC Routing
Drilling
Tapping
Slotting
Engraving
Die Cutting
Supported files: STEP/DXF/PDF/CAD Drawings
Tolerance: ±0.1 mm standard/±0.05 mm available
| Properties | Unit | Value |
| Thickness | mm | 0.5mm–50mm (Custom Thickness Available) |
| Standard Sheet Size | mm | 102×2040 / 1220×2440 |
| Color | – | Brown (Standard), Black (Available Upon Request) |
| Density | g/cm³ | 1.30-1.40 |
| Flexural strength perpendicular to laminations (temp.20°C) | Mpa | 135 |
| Tensile strength | Mpa | 120 |
| Compressive strength perpendicular to laminations | Mpa | 300 |
| Insulation resistance after impregnated in water | Ω | 1×10⁷ |
| Dielectric strength (ion oil at 90°±2°C) parallel to laminations | kV | 20 |
| Dielectric strength (in oil at 90°±2°C, 1mm thickness) perpendicular to laminations | MV/m | 12.1 |
| Water absorption ( thickness 1.6 mm) | mg | 182 |
| Service Temperature | – | Up to 120°C |
Q: Is phenolic paper laminate the same as Bakelite?
A: Yes. Bakelite is the common industry name for phenolic paper laminate.
Q: What is the difference between phenolic paper and phenolic cotton cloth laminate?
A: Paper laminate offers better electrical insulation and lower cost, while cotton cloth laminate provides higher mechanical strength and wear resistance.
Q: Can phenolic paper laminate be CNC machined?
A: Yes. It can be drilled, milled, routed, tapped, and fabricated into complex custom components.
Q: Is phenolic paper laminate suitable for PCB drilling backup boards?
A: Yes. It is widely used as a backup material during PCB drilling operations.
Q: How does it compare with FR4?
A: Phenolic paper laminate is more economical and easier to machine, while FR4 provides higher heat resistance and electrical performance.
Q: Do you provide custom-cut parts?
A: Yes. We offer CNC machining, precision cutting, and custom fabrication services based on customer drawings.
Whether you need standard sheets, precision-machined components, or custom insulation solutions, our engineering team is ready to help.
✓ Custom sizes available
✓ CNC machining service
✓ Fast sample delivery
✓ Global shipping support
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