For your information, the requested pp interlayers (separators) are perforated circular sheets of external diameter 820mm, thickness of the sheet = 3mm, diameter of the hole ( perforation ) = 25mm. as the following specifications : - material : stabilized polypropylene , stand against 1210c. - external diameter of the separator = 820 mm - perforation = about 39 % of the total area - diameter of the perforation ( hole ) = 25 mm -

polypropylene interlayer sheets