Electrical composite coaming board
We produce electrical composite coaming board by multilayer composite of polyester film and non-woven fabric,special heat resistant adhesive as the bonding material.And then surface treatment with special resin.The product has very high mechanical and electrical properties.The shrinkage and humidity absorption is low.And the thermal endurance property is very reliable..Electrical composite coaming board is mainly used for the winding of the low voltage coils in dry-type transformers.It can replace the insulating cylinder which material of epoxy resin insulating board,to increase the efficiency and save the mold.
The standard color is red or brown.Tailor-made color is available.
Recommended width as 1000mm,1100mm,1200mm,1300mm.Tailor-made width is available.
Storage
The product should be upright stored in dry, clean and well-ventilated warehouse. The fire, heat sources and direct sunshine should be avoided. The shelf life is recommended to be one year. The longer storage period must be approved by lab test before using.
Specification
No. | Property | Unit | Requirements | |||
1 | Nominal thickness | mm | 0.5 | 0.83 | 0.9 | |
2 | Tolerance of thickness | mm | ±0.045 | ±0.066 | ±0.09 | |
3 | Quantify and tolerance | g/m² | 622±68 | 1085±87 | 1120±112 | |
4 | Thickness of film | μm | 250 | 350 | 350 | |
5 | Layers of film | V | 1 | 2 | 2 | |
6 | Tensile strength(No bending) | MD | N/10mm | ≥350 | ≥600 | ≥600 |
CD | ≥350 | ≥600 | ≥600 | |||
7 | Elongation（No bending） | MD | % | ≥30 | ≥50 | |
CD | ≥30 | ≥50 | ||||
8 | Breakdown voltage | No bending | kV | ≥30 | ≥35 | ≥35 |
Bending | ≥30 | ≥30 | ≥30 | |||
9 | Temperature Index（ TI ) | ℃ | ≥155 | |||
