Brand: YILONG
Materials: Epoxy Resin + Fiberglass
Color: Yellow
Thickness: 0.3~100mm
Regular Size: 1030mm*1230mm
Custom Size: 1030mm*2030mm, 1220mm*2440mm, 1030mm*1030mm
Packaging: Pallet, Wooden Box
MOQ: 500KG
Description
3240 GRADE A: It has good mechanical and dielectric properties with thermostability and moisture resistivity and good machinability. The thermostability class is B. It is widely used in generator, motor, electronic apparatus as insulating material and components. It is also suitable under oil pressure of transformer and wet environment.
3240 Grade B: It provides reliable mechanical strength and electrical insulation performance with stable thermostability in Class B. Compared with Grade A, it is more economical while still maintaining sufficient dielectric properties and moisture resistance for general applications.
Features
High mechanical strength at medium and elevated temperatures.
Tensile elongation exceeds 50% under high-temperature conditions.
Excellent resistance to mechanical stress and deformation.
Stable electrical insulation performance.
Insulation resistance up to 10¹² Ω even after water immersion.
High dielectric strength (over 35 kV) when tested parallel to laminations under humid conditions.
Good moisture resistance and environmental stability.
Reliable performance in high-humidity environments.
Good machinability for drilling, milling, and CNC processing.
Suitable for high-voltage electrical insulation applications.
Industry Applications
Transformers
Electric motors
Electrical cabinets and control boxes
Electric switches
Household appliances
Railway and automotive industries
Computers and medical equipment
Typical Insulation Parts
Test jigs and fixture PCB testing jigs
Insulation plates and switch insulation plates
Polishing gears
Mould-in cloth and shoe components
Insulation parts made from bakelite sheet
Lithium battery pack components
Technical Data Sheet
| 3240A & 3240B Technical Data Sheet | |||
| NO. | TEST ITEMS | UNIT | TEST RESULT |
| 1 | Bending Strength Perpendicular to Laminations (A) | MPa | 480 |
| Bending Strength Perpendicular to Laminations (B) | MPa | 340 | |
| 2 | Apparent Bending Elastic Modulus (A) | MPa | 2.2*10^4 |
| Apparent Bending Elastic Modulus (B) | MPa | 2.0*10^4 | |
| 3 | Compressive Strength Perpendicular to Laminations compressive | MPa | 438 |
| 4 | Parallel layer shear strength (A) | MPa | 49.8 |
| Parallel layer shear strength (B) | MPa | 52.7 | |
| 5 | Tensile Strength (A) | MPa | 368 |
| Tensile Strength (B) | MPa | 187 | |
| 6 | Parallel Layer Impact Strength (Simply Supported Beam, Gap) (A) | KJ/m² | 47 |
| Parallel Layer Impact Strength (Simply Supported Beam, Gap) (B) | KJ/m² | 36 | |
| 7 | Vertical Layer Breakdown Voltage (90℃ + 2℃, 25# transformer oil, 20s step by step boost, φ25mm/φ75mm cylinder electrode system) | kV/mm | 21.5 |
| 8 | Parallel Layer Breakdown Voltage (90℃ + 2℃, 25# transformer oil, 20s step by step boost, φ130mm/φ130mm flat plate electrode system) | KV | 90 |
| 9 | Relative Permittivity (50Hz) | - | 4.9 |
| 10 | Insulation Resistance after 24h immersion in water | Ω | 2.3*10^13 |
| 11 | Density | g/cm3 | 1.9-2.1 |
| 12 | Flammability (A) | Grade | V-0 |
| Flammability (B) | Grade | V-1 | |
| 13 | Water Absorption | mg | 36 |
| 14 | Deflection Temperature under Load | ℃ | ＞140 |
REMARK:
1. NO.5 the sample height is (10.32~10.39) mm;
2. NO.10 the sample thickness is (2.09~2.11) mm;
3. NO.11 the sample size is (100.01~100.07) mm*(25.20~25.31) mm*(5.06~5.20) mm thickness, the electrode spacing is (25.20~25.31) mm;
4. NO.15 the sample size is (18.87~12.99) mm*(4.23~4.28) mm;
5. NO.16 the sample size is (50.39~50.51)mm*(50.37~50.50)mm * (4.24~4.27) mm .
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