Papermaking process and paper thus obtained

Details Papermaking process and paper thus obtained Papermaking process and paper thus obtained

D - Textiles, Paper

21

H

D21H 17/29 (2006.01) D21H 17/00 (2006.01) D21H 17/66 (2006.01) D21H 17/67 (2006.01) D21H 17/68 (2006.01) D21H 17/74 (1995.01)

Patent

CA 2073610

A method for manufacturing paper is disclosed which includes adding to the fibrous composition entering the head box: a) a mineral filler, b) a sizing agent, and c) a retention system comprised of : c) 1) cationic starch, c) 2) polyaluminum chloride, and c) 3) silica of anionic nature. The percentages by weight of products c)1), c)2), and c)3), based on the weight of composition entering the head box, are as follows: 0.2 to 1.7%, 0.01 to 0.3% expressed as percentage of Al203, and 0.01 to 0.3% expresses as percentage of SiO2, the cationic starch having a molecular weight of 3.104 to 12.104 and a degree of substitution of 0.01 to 0.1.

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