Semisynthetic paper structure on a urea basis

Details Semisynthetic paper structure on a urea basis Semisynthetic paper structure on a urea basis

D - Textiles, Paper

21

H

9/54

D21H 17/50 (2006.01) C05C 9/02 (2006.01)

Patent

CA 1101157

CANADIAN PATENT APPLICATION OF OLOF SUND?N and BIRGITTA SUND?N FOR SEMISYNTHETIC PAPER STRUCTURE ON A UREA BASIS Abstract of the Disclosure A semisynthetic paper with low bulk comprises a con- tinuous, chemically bonded, open fibre network formed by cel- lulosic vegetable fibres and fragments of urea formaldehyde condensate, the fragments being precured before paper web formation and being cured a second time when drying the paper web. A method of producing a semisynthetic paper with low bulk comprises the steps of forming precured fragments of a urea-formaldehyde condensate, forming a stock of the fragments and cellulosic vegetable fibres, including in the stock a water-insoluble latent curing agent, forming a paper web from the stock, and drying the paper web, the fragments being cured a second time during the drying operation.

286870

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