D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 9/00 (2006.01) D21H 11/20 (2006.01) D21H 21/14 (2006.01)
Patent
CA 2549650
The present invention concerns a process for reducing the susceptibility of lignocellulosic material to unwanted yellowing, particularly yellowing caused by light and heat. According to the invention, the fibres are activated enzymatically or chemically and then contacted with a modifying agent capable of bonding to the oxidized fibre material, rendering the lignocellulosic fibre material improved resistance to brightness reversion. By means of the invention, brightness reversion caused by light or heat or a combination thereof can be retarded and even stopped.
L'invention concerne un procédé de réduction de la sensibilité d'une matière lignocellulosique au jaunissement non désiré, en particulier au jaunissement provoqué par la lumière et la chaleur. Selon l'invention, les fibres sont activées par voie enzymatique ou chimique puis sont mises en contact avec un agent de modification assurant une liaison à la matière en fibre oxydée, améliorant ainsi la résistance à la réversion de blancheur de ladite matière en fibre lignocellulosique. L'invention permet ainsi de retarder, voire de supprimer la réversion de blancheur provoquée par la lumière ou la chaleur ou par une combinaison de celles-ci.
Buchert Johanna
Groenqvist Stina
Paren Aarto
Svedman Mikael
Viikari Liisa
Kemira Oyj
Macrae & Co.
LandOfFree
Method for reducing brightness reversion of mechanical pulps... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for reducing brightness reversion of mechanical pulps..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reducing brightness reversion of mechanical pulps... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1892456