Treatment of fibres to endure processing

Details Treatment of fibres to endure processing Treatment of fibres to endure processing

C - Chemistry, Metallurgy

08

B

C08B 3/14 (2006.01) C08B 3/20 (2006.01) D21H 17/14 (2006.01) D21H 21/14 (2006.01)

Patent

CA 2755498

The invention relates to a method of treating chemical pulp fibres by a polymerizing hydroxy acid, the fibres thus obtained and the products refined from them. In the method, the hydroxy acid reacts with the reactive groups of the fibres in the presence of a catalyst, forming ester bonds. The following units of the same hydroxy acid are oligomerized and/or polymerized to these grafted acid residues. The fibres thus treated and the products refined thereof endure better processinging stages that include drawing and stretching than untreated fibres.

L'invention concerne un procédé de traitement de fibres de pâte chimique par un hydroxy-acide de polymérisation, ainsi que les fibres ainsi obtenues et les produits raffinés à partir d'elles. Dans ce procédé, l'hydroxy-acide réagit avec les groupes réactifs des fibres en présence d'un catalyseur, pour former des liaisons ester. Les unités suivantes du même hydroxy-acide sont oligomérisées et/ou polymérisées jusqu'à ces résidus acides greffés. Les fibres ainsi traitées et les produits raffinés qui en résultent supportent mieux des stades de traitement comportant notamment l'étirage et l'allongement que les fibres non traitées.

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