Process for producing paper and paperboard having high...

Details Process for producing paper and paperboard having high... Process for producing paper and paperboard having high...

D - Textiles, Paper

21

H

D21H 17/28 (2006.01) D21H 17/66 (2006.01) D21H 23/16 (2006.01)

Patent

CA 2157692

Process for producing paper and paperboard which comprises adding to a cellulose pulp stock a natural starch and an aluminum and/or iron salt. The so obtained cellulose pulp stock is then submitted to dewatering and subsequent calendering according to conventional techniques. In such a way, retention of the natural starch on the cellulose fibers is remarkably increased. To further increase retention it is particularly advantageous to pre-mix the natural starch with the aluminum and/or iron salt and then to add the resulting mixture to the cellulose pulp stock.

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