| Application: | Insulators, Electrical Base, Shell, Switch Baseplate |
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| Type: | Insulation Sheet |
| Material: | Fiberglass |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier 3025 Phenolic Cotton Cloth Laminate Sheet Description
The phenolic cotton cloth laminated sheet is also called phenolic epoxy laminated sheet or phenolic laminated sheet cover, which is a laminated material made by hot pressing of cotton cloths impregnated with a thermosetting phenol-formaldehyde-based binder. The heat resistance rating is E. It has high mechanical properties, oil resistance, and certain dielectric properties.
Due to the use of cotton cloths, the phenolic cotton cloth laminate sheet has high compression strength and increased resilience, favorably lends itself to machining by drilling, cutting, and forging. That is why the phenolic epoxy resin cotton cloth laminated sheets are widely used to make parts loaded with reversed electrical and mechanical stresses or working under friction (bushings, cams, etc.).
The phenolic cotton cloth sheets are used as insulating material for work in transformer oil and in the air at a normal relative humidity of the environment and at 50 Hz of frequency.
Phenolic Laminated Sheet Cover Features
1. Very good mechanic and thermal properties
2. Lasting operating temperature to 120°C
3. Approved for oil and air
4. Low friction coefficient
5. High creep resistance
6. Vibration absorption properties
7. Easy mechanical processing
8. Electro-insulation properties
| Name | Unit | Value | |||
| 3025 | 3026 | 3027 | 3028 | ||
| Vertical layer bending strength | MPa | ≥100 | ≥110 | ≥90 | ≥100 |
| Parallel layer impact strength | kJ/m2 | ≥8.8 | ≥7.0 | ≥7.8 | ≥6.6 |
| Vertical layer electrical strength(In 90 ºC transformer oil, 1mm) | kV/mm | ≥0.82 | ≥0.82 | ≥5.10 | ≥6.30 |
| Parallel layer breakdown voltage(In 90 ºC transformer oil) | kV | ≥1 | ≥1 | ≥18 | ≥20 |
| Insulation resistance after immersion in water | Ω | ≥1*10^6 | ≥1*10^6 | ≥5*10^7 | ≥5*10^7 |
| dielectric constant (48Hz-62Hz) | ---- | ---- | ---- | ≤5.5 | ≤5.5 |
| Water absorption (2mm) | mg | ≤229 | ≤229 | ≤151 | ≤151 |
| Name | Unit | Value | ||
| 3020 | 3021 | 3022 | ||
| Vertical layer bending strength | MPa | ≥120 | ≥120 | ≥180 |
| Adhesive strength (board thickness≥10mm) | N | ≥3600 | ≥3200 | ≥3600 |
| Vertical layer electrical strength(In 90 ºC transformer oil, 1mm) | kV/mm | ≥15.8 | ≥12.1 | ≥15.8 |
| Parallel layer breakdown voltage(In 900 ºC transformer oil) | kV | ≥35^a | ≥20 | ---- |
| Parallel layer withstand voltage(In 20 ºC transformer oil, 5mm) | kV | ---- | ---- | ≥14 |
| Insulation resistance after immersion in water | Ω | ≥1.0*10^7 | ≥1.0*10^7 | ≥1.0*10^7b |
| Dielectric constant (48Hz-62Hz) | ---- | ≤5.5 | ---- | ---- |
| Dielectric constant (1MHz) | ---- | ---- | ≤5.5 | ---- |
| Dielectric dissipation factor (48Hz-62Hz) | ---- | ≤0.05 | ---- | ---- |
| Dielectric dissipation factor (1MHz) | ---- | ---- | ≤0.05 | ---- |
| Water absorption (2mm) | mg | ≤220 | ≤190 | ---- |
Phenolic Paper Laminated Sheet Applications
1. 3025 phenolic cloth board is widely used in electrical products.
2. Phenolic laminated paper and cloth sheets have a density of about 1.35 g/cm, which is half lighter than aluminum, and are used in aviation and other structures.
3. 3025 phenolic laminates are chemically resistant, resistant to organic solvents, organic acids, and rare mineral acids. They are suitable for many chemical equipment and are generally not suitable for alkaline media.
Q: How will you pack the product?
A: We pack with paper cartons.
Q: Do you accept OEM?
A: Yes, we do.
Q: Do you provide free sample? And how many days it will take?
A: Yes, we provide free sample, only need you to pay the courier charge. We will make the sample within 3 workingdays and it will take 3-7days on the transportation.
Q: What's your delivery time?
A: We are factory, so we can efficiently control the production time, and then for the delivery time, it is 5-20 working days.
Q: Which certification do you have?
A: The plant has passed the certificate of lSO 9001 quality system certification;
Q: What's your payment term?
A: We accept T/T,L/C, Western Union, Paypal,Escrow,or customized if it is acceptable.
Q: Which shipping method is there?
A: Air,Sea, Land, Rail,Choose the most suitable shipping method according to the quantity of your goods.
Suppliers with verified business licenses
Audited Supplier 
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