Pulp reactivity enhancement

Details Pulp reactivity enhancement Pulp reactivity enhancement

D - Textiles, Paper

21

C

D21C 9/00 (2006.01) C08B 1/00 (2006.01) C08B 9/00 (2006.01)

Patent

CA 2655035

This invention relates to pulp reactivity enhancement. In particular, the invention relates to a method of producing an alkali cellulose which includes steps of providing a pulp and subjecting the pulp to an alkaline treatment to produce the alkali cellulose in the presence of a spacer capable of entering the holes in the interfibrillar spaces of the cellulose fibres. The spacer enters the holes in the interfibrillar spaces of the cellulose fibres, particularly those created by the removal of hemi-cellulose, reducing the tendency for collapse to occur, for example during the subsequent pressing step. Examples of suitable spacers are polyethylene glycols, polyvinyl alcohols and polyacrylates.

Cette invention concerne l'amélioration de la réactivité de la pâte de cellulose. En particulier, l'invention concerne un procédé de fabrication d'une cellulose alcaline comportant les étapes consistant à se procurer une pâte de cellulose et à soumettre la pâte de cellulose à un traitement alcalin pour obtenir la cellulose alcaline en présence d'un agent espaceur pouvant pénétrer dans les trous des espaces inter-fibrilles des fibres de cellulose. L'agent espaceur pénètre dans les trous des espaces inter-fibrilles des fibres de cellulose, en particulier ceux créés par l'élimination de l'hémi-cellulose, réduisant la tendance à un écrasement, par exemple pendant le processus de pressage ultérieur. Les polyéthylène glycols, les alcools polyvinyliques et les polyacrylates, par exemple, constituent des agents espaceurs appropriés.

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