Nomex® pressboard meets the need for design flexibility in applications that demand special customization by offering a variety of mechanical properties. Low-density pressboards allow easy formation of complex shapes; medium-density pressboards balance rigidity and conformability, and dense pressboards offer superior stability under heavy loads.
While pressboards are typically used as spacers and barriers in transformers and as end-lamination in motors, Nomex® pressboards are unique in their increased thickness and rigidity.
Type 992 is a low-density pressboard produced in two thicknesses 1.6 and 3.2 mm (63 and 125 mil), with a specific gravity of 0.5. This material's low density allows easy formation of complex shapes, and provides the highest saturability of Nomex® pressboard products.
Type 993 is a medium-density pressboard produced in thicknesses from 1.0 to 4.0 mm (40 to 160 mil), with specific gravities of 0.7 to 0.9. This material provides a balance of rigidity and conformability, along with outstanding saturability and excellent properties in oil.
Type 994, a high-density pressboard, is available in thicknesses from 1.0 to 9.6 mm (40 to 380 mil) with specific gravities from 1.1 to 1.2. It provides superior stability under compressive loads. This material will also absorb oils and other fluids, though not as readily as Nomex ® Types 992 and 993.