Method for producing fibrous sheet
AssigneeMitsubishi Paper Mills Limited
InventorsMasahiro Amano, Takashi Koike
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Abstract
A fibrous sheet bonded with a latex flocculate is produced by adding zinc white powders to a carboxyl modified anionic latex, adjusting the pH to at least 7, adding thereto a water soluble cationic polymer to obtain a latex flocculate, adding thus obtained flocculate to a fiber slurry and subjecting the fiber slurry to a known wet paper making process.
Claims8
A method for producing a fibrous sheet which consists of adding zinc white to a carboxyl modified anionic latex to disperse the zinc white in the latex, adjusting pH of the dispersion to at least 7, adding a water soluble cationic polymer to the dispersion at said pH while stirring to produce a latex flocculate having a particle size of 100.mu.-500.mu., adding said latex flocculate to a fiber slurry, producing a sheet therefrom by wet paper making process and drying the resultant sheet.
Dependencies are inferred from the claim text.