product description
Description of Phenolic Cotton Board
Phenolic cotton cloth laminate sheet, cotton cloth impregnated with phenolic resin, and laminating them under heat and pressure in round-shape mould, also know as thermoset. Offer high electrical and mechanical performance, including good electrical insulating properties, high moisture resistance, good dimentional stability, much better machinability than other phenolics.
Characteristics of Phenolic Cotton Board
1) High electrical and mechanical performance.
2) Easy for fabrication, good dimentional stability, physical strength, resiliency.
3) Better machinability than other products.
Parameter of Phenolic Cotton Board
| Standard | GB/T 1303-2009/ IEC60893-2003 | ||||||
| Basic Information | Chinese Name | 3025 | 3025A | 3026 | 3027 | 3021 | |
| IEC | PFCC201 | PFCC202 | PFCC203 | PFCC305 | PFCP201 | ||
| Basic Material | Cloth | Paper | |||||
| Resin | Phenolic | Phenolic | |||||
| Color | Brown | Red Brown | |||||
| No. | Test Item | Unit | Value | Value | |||
| 1 | Density | g/m³ | 1.3~1.4 | 1.25~1.4 | |||
| 2 | Vertical Layer Bending Strength(normal) | Mpa | ≥100 | ≥90 | ≥110 | ≥125 | ≥120 |
| 3 |
Parallel Layer Impact Strength (simply supported beam method) |
KJ/m² | ≥7.8 | ||||
| 4 | Vertical Layer Electrical Strength (90℃ transformer oil)(1mm thickness) | Kv/mm | ≥5.1 | ≥5.1 | ≥5.1 | ≥5.1 | ≥15.8 |
| 5 | Parallel Layer Breakdown Voltage (90℃ transformer oil) | kv | ≥20 | ≥35 | |||
| 6 | Dielectric Constant (50Hz) | - | ≤5.5(1MHZ) | ≤5.5(1MHZ) | |||
| 7 | Insulation Resistance after Immersion | Ω | ≥5*107 | ≥5*107 | |||
| 8 | Proof Tracking Index(PTI) | - | ≥100 | ≥100 | |||
| 9 | Temperature Index | - | 120 | 120 | |||
| 10 | Water Absorption (1-20mm thickness) | mg | 206~406 | 136~277 | 180~970 | ||
| Note: Range values are measured for different thicknesses | |||||||