Durostone ® UPM 203 is a material made by hot pressing glass mat impregnated with a modified unsaturated polyester resin binder and fillers. It stands out among analogues by its uniform structure, a combination of pronounced dielectric and structural qualities, and chemical resistance. In addition, the material is immune to temperature effects, has low flammability. UPM 203 is free from asbestos and phenolics.
Fiberglass is most widely used in the manufacture of:
- busbar support insulators,
- high voltage insulators
- low-voltage switches and switchboards,
- power electronics mounting panels,
- interphase barriers of transformers.
Among the key features of the material, it is worth highlighting its ability to completely replace previously used asbestos-containing sheets. At the same time, fiberglass Durostone ® UPM 203 has low water absorption, arc resistance, and resistance to electroerosive corrosion. The material is resistant to prolonged exposure to mineral transformer oil at voltages up to 1000 V, which makes it possible to use it in oil-filled devices.