Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Nacional De Celulosa S A Empre
Original Assignee
Nacional De Celulosa S A Empre
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Filing date
Publication date
Application filed by Nacional De Celulosa S A EmprefiledCriticalNacional De Celulosa S A Empre
Priority to ES8801636ApriorityCriticalpatent/ES2006957A6/en
Publication of ES2006957A6publicationCriticalpatent/ES2006957A6/en
The adhesive is made from black lyes obtained from cellulose pulp, by fractionating the lignins by ultra-filtration. The final adhesive is the concentrate made in one or two stages of the fractions with mol. wt. over 100,000. The lignin ash content of the final concentrate is reduced by 3-4 times from that of the lye, which gives rise to corrugated cardboard with better resistance to moisture than conventional glues without the need for special additives. - The process can be completed with a supplementary pptn. of ash by alkali treatment.
Procedure to separate cellulose pulp fibers in fractions with different characteristics. (Machine-translation by Google Translate, not legally binding)