D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 11/00 (2006.01)
Patent
CA 2053505
Apparatus and process for producing foam formed fibrous web in which the furnish is made up by mixing a thin water slurry of fibers at a consistency in the range of from about 0.5 to about 7 weight percent fibers with sufficient aqueous foam containing a surfactant and having an air content in the range of from about 55 to about 80 percent by volume to form a foamed fiber furnish containing from about 0.1 to about 3 weight percent fibers which is supplied directly to the forming felt or wire of a twin wire papermaking machine, adding makeup surfactant and discarding excess agueous foam from the process as required to maintain the desired volume of foamed liquid therein.
Cette invention concerne un procédé et une installation de formation d'une nappe fibreuse moussée dont la composition de fabrication est obtenue par malaxage d'une suspension aqueuse diluée de fibres dont la densité se situe entre environ 0,5 et environ 7 % en poids de fibres avec suffisamment de mousse aqueuse renfermant un surfactant et ayant une teneur en air entre environ 55 et environ 80 % en volume pour constituer une composition de fabrication moussée renfermant entre environ 0,1 à environ 3 % en poids de fibres acheminée directement à la toile de formation simple ou double d'une machine à papier. Le procédé prévoit l'ajout de surfactant d'appoint et le rejet de la mousse aqueuse excédentaire selon les besoins pour maintenir le volume de liquide moussé voulu.
Bhat Dinesh M.
Dwiggins John Henry
Georgia-Pacific Consumer Products Lp
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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