Treatment of fibrous material

Details Treatment of fibrous material Treatment of fibrous material

B - Operations, Transporting

32

B

154/99

B32B 29/06 (2006.01) B32B 5/00 (2006.01) B32B 5/08 (2006.01) B32B 21/10 (2006.01) B32B 29/00 (2006.01) D04H 1/64 (2006.01) D04H 13/00 (2006.01) D06M 17/00 (2006.01) D21F 9/00 (2006.01) D21F 11/00 (2006.01) D21J 1/00 (2006.01)

Patent

CA 1061237

Abstract In a process for making a multi-ply consolidated dry-formed fibrous web having at least three plies, the outer plies are impregnated with a stiffening agent (e.g. starch) and the intermediate plies are impregnated with a sizing agent (e.g. wax/rosin size) to render them impervious to the stiffening agent. After the web has been consolidated by hot moist pressing, its outer surfaces may be further sized and hot moulded.

236825

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