Black Bakelite Board Phenolic Laminated Sheet

Black Bakelite Board is a phenolic laminated sheet (also known as 3021 Phenolic Paper Laminated Sheet) widely used for electrical insulation and industrial structural applications. It is made by impregnating base materials such as paper or fabric with phenolic resin, then laminating them under heat and pressure into a rigid board. 

This material is valued for its good balance of:

• electrical insulation

• mechanical strength

• dimensional stability

• machinability

• heat resistance for general industrial use

Because of these properties, black Bakelite board is commonly used in electrical insulation parts, washers, spacers, switchgear components, jigs, fixtures and mechanical support parts.

Black Bakelite board is a phenolic resin laminated board.  Black Bakelite board is widely used in the following fields: Electrical Insulation Parts Industrial Mechanical Parts Jigs and Fixtures and General Equipment Components

• Product Name: Black Bakelite Board

• Material: Phenolic laminated sheet

• Supply Form: Sheets, cut pieces, machined parts (Custom CNC Machining Services)

• Density 1.45 g/cm³

• Tensile Strength ≥ 100 MPa

• Thickness: 0.5-100mm

• Size: 1030x2040/1220x2440/1220x2200,(or customized machining parts)

  
  

Advantages of Phenolic Paper-based Board

1. Outstanding Mechanical Rigidity: High resistance to bending, shearing, and structural deformation under continuous mechanical load.

2. Premium Dielectric Isolation: Protects against electrical leakage and flashovers in power distribution systems under dry and oil-immersed conditions.

3. Excellent Heat Resistance: Operates stably at continuous temperatures up to 120°C without losing its physical or insulation properties.

4. Cost-Efficient Alternative to Epoxy: Offers an optimal performance-to-cost ratio for applications that do not strictly require Class F or H high-frequency ratings.

How to Choose the Right Black Bakelite Board

When selecting black Bakelite board, buyers should first confirm the actual application.

1. Electrical or Mechanical Use

If the part is mainly for electrical insulation, a paper-based grade may be enough.

If the part also needs better mechanical strength, a fabric-based grade may be better.

2. Thickness

Board thickness should match the actual part design, insulation distance and machining requirement.

3. Machining Requirement

If the material will be drilled, milled or shaped into complex parts, machining performance becomes more important.

Black Bakelite Board vs Other Insulation Boards

Black Bakelite Board vs FR4

Bakelite board is usually more economical

FR4 generally offers higher electrical and mechanical performance

Bakelite is often enough for standard industrial insulation parts

Black Bakelite Board vs Epoxy Glass Laminate

Bakelite is easier to justify when budget matters

epoxy glass laminates are usually selected for higher-performance applications

FAQ

Q:What is black Bakelite board made of?

A: Black Bakelite board is made from base materials such as paper or fabric impregnated with phenolic resin and laminated under heat and pressure.

Q: Can black Bakelite board be machined?

A: Yes. It can be cut, drilled, milled and punched into different industrial parts.

Q: What is the difference between Phenolic Paper Sheet (3021) and Phenolic Cotton Sheet (3025)?

A: 3021 utilizes kraft paper as the reinforcement base, providing higher electrical insulation properties and a smoother surface finish, making it ideal for electrical barriers. 3025 uses cotton fabric, which provides significantly higher impact strength and toughness, making it preferred for mechanical gears and wear plates.

Black Bakelite Board is a practical phenolic laminated sheet for electrical insulation and industrial fabrication. With good insulation performance, mechanical strength, machinability and dimensional stability, it remains a widely used material for standard industrial applications.

If you need a rigid, black-colored insulation board for washers, spacers, support parts or electrical components, black Bakelite board is a reliable and cost-effective option.