

Phenolic Paper Board
Main Parameters
Model: 3021
Insulation class: B class (130 °C)
Color: Brown,red,orange,black.
Thickness:2-100mm
Size:1020*2070mm
Phenolic paper laminated Board is made up of paper impregnated with phenolic resin by baking and heat pressing. It is used as a material for isolation in conditions of normal relative humidity of an environment and in transformer oil at a pressure up to 1000V. Phenolic paper laminate sheet it is possible is long to maintain at working temperature from-65°С up to +120°С
—Excellent dielectric properties
—Great machinability and easy to process
—Superior resistance to acid, chemical solvents and insulating oil
—Insulation class: B class (130 °C)
—Color: Brown,red,orange,black.
—Thickness:2-100mm
—Size:1020*2070mm
—3021 phenolic paper laminated Board has been approved by UL (NO.: E310670) ,ROHS and REACH test.
| NO. | Item | Unit | Index value |
| 1 | Density | g/cm3 | 1.45 |
| 2 | Thermostability: 20mm or below
20mm or above |
℃ | 115 90 |
| 3 | Bending strength(3mm or above) | Mpa | ≥117.6 |
| 4 | Tensile strength | Mpa | ≥90 |
| 5 | Adhesive strength | N | ≥3136 |
| 6 | Impact-resistance strength | ≥15 | |
| 7 | Parallel insulation resistance:normal after becoming damp |
KΩ | ≥1.0×103 ≥1.0×101Mpa |
| 8 | Vertical dielectric strength: withstand voltage for 5 minutes in transformer oil,1mm. | MV/m | ≥16 |
| 9 | Parallel breakdown voltage:withstand voltage for 5 minutes in transformer oil. Temperature 20℃±5℃. | KV | ≥14 |
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Phenolic Paper Board
- Electrical & Electronic Industry:
- Insulation components for low/medium-voltage electrical equipment: transformer terminal blocks, motor slot wedges, switchgear partitions, and circuit board supports;
- Base plates for electrical appliances: socket panels, junction box covers, and insulating washers for power tools.
- Industrial Machinery:
- Structural spacers and guide rails for mechanical equipment (e.g., textile machines, printing machines);
- Insulating sleeves for hydraulic valves and pneumatic components (to prevent electrical interference).
- Household Appliances:
- Insulation parts for electric cookers, water heaters, and air conditioners (e.g., heating element supports, wire terminal insulation boards);
- Heat-resistant panels for microwave ovens and toasters.
- Automotive Industry:
- Low-voltage insulation components: automotive fuse box partitions, wire harness brackets, and instrument panel insulating pads (not suitable for high-temperature engine compartments).

