GB1058616A - Fourdrinier wires for paper-making machines - Google Patents

Abstract

A Fourdrinier wire comprising woven warp and weft strands which combine to form a series of depressions under a longitudinal surface plane of the woven wire, the said depressions being formed between the crests of the knuckles of the warp and weft strands at their point of cross-over with each other in which the depressions each contain a filling of synthetic resinous material, having a width not greater than the diameter of each individual wire strand and extending along the surface of the individual warp and weft strands from the crest of the knuckle of one strand to the crest of the knuckle of the adjacent cross-over strands so as to fill the depression, the filling extending vertically from the surface of the strands to the level of a longitudinal surface plane of the woven wire as defined by the crests of the knuckles of the individual warp and weft strands. The resinous material may be an epoxy-modified phenolic epoxy-modified polyamide, polyester, epoxy-modified-ester, or polyurethane resin. Two different plastics coatings may be applied e.g. a primer coat of polyvinyl butyral resin and a topcoat of vinyl chloride-vinyl acetate copolymer or urea alkyd resin. The woven wire may be sprayed with the synthetic resinous material and hot air may be blown through the mesh to maintain the interstices at their orifinal sizes. Build up of the plastics material above the longitudinal surface plane of the wire may be eliminated by wiping or flattening using rolling or grinding action.