D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 3/00 (2006.01)
Patent
CA 2668158
This invention provides a composition and method for improving a mechanical pulping process by decreasing freeness and amount of shives, providing energy and chemical savings, and enhancing brightness and mechanical strength of a paper product made from a pulp material in the process. The composition includes formulations, such as surfactants, chelants, hydrotropes, reductive and oxidative pulp modifiers, and pH-controlling chemicals. The method includes selectively introducing these formulations to the pulp material in the mechanical pulping process.
L'invention porte sur une composition et une méthode améliorant le processus de production de la pâte mécanique en diminuant la mobilité et la quantité des anas, et permettant des économies en énergie et en produits chimiques tout en augmentant la brillance et la résistance mécanique d'un produit papetier. La composition inclut des formulations, telles que des surfactants, des chélants, des hydrotropes, des modificateurs de pâte, des réducteurs et oxydants et des produits chimiques régulant le pH. La méthode consiste à introduire sélectivement ces formulations dans la pâte au cours du processus mécanique de formation de la pâte.
Duggirala Prasad Y.
Shevchenko Sergey M.
Borden Ladner Gervais Llp
Nalco Company
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