Insulation Sheet/Board
3021 Phenolic Paper Laminated Sheet
3021 phenolic paper laminated sheet also called Electrical Bakelite Board uses high-quality bleached wood paper and cotton lint paper as reinforcements, and is made of phenolic resin reactedwith high-purity, fully synthetic petrochemical raw materials.
Type: Laminated board
Heat-resistance: E Class 120°C
Thickness (mm): 0.5-100
Size(mm): 1030x2040/1220x2440/1220x2200,(or customized)
Color: Brown, orange, black
Package: pallet
Description
3021 Phenolic Paper Laminated Sheet is a rigid electrical insulation board made from insulating paper impregnated with phenolic resin and laminated under heat and pressure.
It is also commonly called phenolic paper laminate sheet, paper bakelite sheet, electrical bakelite board, paper-based phenolic laminate or Paxolin Sheets. Compared with phenolic cotton cloth laminated sheet, 3021 phenolic paper sheet is more economical and is suitable for electrical insulation parts that require stable insulation performance, easy machining and moderate mechanical strength.
Chengrui supplies 3021 phenolic paper laminated sheets in full sheets, cut pieces and machined insulation parts for electrical panels, terminal boards, spacers, washers, insulating pads and other electrical equipment components.
What Is 3021 Phenolic Paper Laminated Sheet?
3021 phenolic paper laminated sheet is a thermosetting laminated material.
The base material is electrical insulation paper. During production, the paper is impregnated with phenolic resin, stacked in layers, and then pressed under high temperature and pressure. After curing, the material becomes a hard, dense and machinable insulation board.
The basic structure can be understood as:
Insulation Paper + Phenolic Resin
→ Heat and Pressure Lamination
→ 3021 Phenolic Paper Laminated Sheet
Because the reinforcement layer is paper, 3021 is different from 3025 phenolic cotton cloth sheet. 3021 is usually selected for cost-effective electrical insulation boards and machined parts where extremely high mechanical strength is not the main requirement.
3021 phenolic paper board is ideally suited for use as insulating structural components in a wide range of electrical applications. It performs reliably in motors, various electrical equipment, and within transformer oil, making it a versatile and cost-effective solution for the electrical engineering and manufacturing industries.
| Product Name | Unit | Phenolic Paper Laminate |
| Type | 3021 Bakelite phenolic board/sheet | |
| Tensile Strength | MPa | ≥104 |
| Density | g/cm³ | 1.3--1.45 |
| Vertical bending Strength | Mpa | ≥120 |
| Vertical compression Strength | Mpa | ≥250 |
| Adhesive Strength | N | ≥3600 |
| Size | mm | 1030x2040/1220x2440/1220x2200 or customized |
Main Applications of Phenolic Paper Sheet
1. Electrical Terminal Boards
3021 phenolic paper laminated sheet is commonly used for electrical terminal boards.
It can be cut, drilled and machined into boards used for wire connection, component support and electrical separation.
2. Electrical Panels and Switchgear
In electrical panels and switchgear, phenolic paper laminate sheet can be used as an insulation plate, support plate or partition board.
It provides electrical separation between conductive parts and helps support internal components.
3. Spacers and Washers
3021 phenolic paper board can be punched or machined into spacers, washers and insulating pads.
These parts are used to separate metal components and reduce electrical contact risk.
4. Machined Insulation Parts
Many customers buy 3021 phenolic paper laminated sheet for further machining.
5. Electrical Equipment Components
3021 phenolic paper laminated sheet can be used in many electrical equipment assemblies where moderate mechanical strength and stable insulation are needed.
3021 Phenolic Paper Sheet vs 3025 Phenolic Cotton Cloth Sheet
3021 and 3025 are both phenolic laminated sheets, but they are not the same material.
| Item | 3021 Phenolic Paper Laminated Sheet | 3025 Phenolic Cotton Cloth Laminated Sheet |
| Reinforcement Material | Insulation paper | Cotton cloth |
| Resin | Phenolic resin | Phenolic resin |
| Main Feature | Economical electrical insulation board | Better toughness and machinability |
| Thermal Class | E Class 120°C | E Class 120°C |
| Typical Use | Terminal boards, panels, washers, spacers | Bushings, support plates, machined insulation parts |
If the part mainly needs cost-effective electrical insulation, 3021 is usually suitable.
If the part needs better toughness, impact resistance or stronger machining performance, 3025 phenolic cotton cloth laminated sheet is usually a better choice.
Related Products
Chengrui also supplies related laminated insulation materials:
3025 Phenolic Cotton Cloth Laminated Sheet
3240 Epoxy Glass Cloth Laminated Sheet
G10 / G11 Epoxy Fiberglass Sheet
These materials can be selected according to electrical insulation, mechanical strength, heat resistance, moisture resistance and machining requirements.
FAQ
Q1: What is 3021 phenolic paper laminated sheet?
A: 3021 phenolic paper laminated sheet is a rigid electrical insulation board made from insulation paper impregnated with phenolic resin and laminated under heat and pressure.
Q2: Is phenolic paper laminated sheet the same as bakelite board?
A: In many markets, phenolic paper laminated sheet is commonly called paper bakelite sheet or electrical bakelite board. However, bakelite board can also refer to other phenolic laminated materials, so the material structure should be confirmed.
Q3: What is 3021 phenolic paper laminated sheet used for?
A: It is used for terminal boards, electrical panels, spacers, washers, insulating pads, support plates and machined electrical insulation parts.
Q4: What is the difference between 3021 and 3025 phenolic sheet?
A: 3021 is paper-based phenolic laminate. 3025 is cotton cloth reinforced phenolic laminate. 3025 has better toughness and mechanical strength, while 3021 is more economical.
Parameter
| Type | Insulation Board | |||||
| Heat-resistance | E Class 120°C | |||||
| Thickness | 0.5-100mm | |||||
| Size | 1030x2040mm/1220x2440mm/1220x2200mm,(or customized) | |||||
| Color | brown, orange, black | |||||
| For more information, please contact us: [email protected] | ||||||
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Quick Answers for You
Quick answers to your pressing questions.
Q: How do you ensure consistent quality from batch to batch?
A: We control key parameters such as thickness, dimensions, dielectric performance, mechanical strength and moisture according to the product specification. Batch inspection and traceable test records help maintain consistent performance for repeat orders.
Q: Can you provide samples for testing?
A: Yes. Samples can be provided for material evaluation, testing or production trials. For customized materials, sample availability and lead time depend on the required specification.
Q: What technical documents can you provide?
A: Depending on the material, we can provide ISO, TDS, RoHS, REACH, SGS reports and relevant IEC or UL information for technical evaluation and supplier approval.
Q: What are your MOQ, lead time and shipping options?
A: MOQ and lead time vary by material, specification and processing requirement. Low MOQ and trial order can be accept accordingly. We support international shipments by sea, air and express courier.
Q: Are you a trader or manufacturer?
A: Chengrui combines our own manufacturing capabilities (flexible laminates, insulation sleeving etc) with a qualified partner production network. This allows us to supply a broader range of electrical insulation materials while maintaining specification control, quality inspection and technical support.
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