Manufacture of paper

Details Manufacture of paper Manufacture of paper

D - Textiles, Paper

21

H

D21H 17/28 (2006.01) D21H 23/02 (2006.01) D21H 23/14 (2006.01) D21H 17/68 (2006.01) D21H 27/10 (2006.01)

Patent

CA 2269911

Starch is added to the thinstock in a papermaking process in the form of a coagulated slurry containing undissolved starch particles, cationic polymeric flocculant and anionic microparticulate network agglomeration aid, such as bentonite. The flocculant and agglomeration aid interact to give network flocculation in which the starch particles are trapped. Improved retention of the starch in the resulting paper is achieved.

Dans un procédé de fabrication du papier, de l'amidon est ajouté à une pâte mince sous la forme d'une suspension coagulée contenant des particules d'amidon non dissoutes, un floculant polymérique cationique et un adjuvant d'agrégation de réseau microparticulaire anionique, tel que la bentonite. Le floculant et l'adjuvant d'agrégation interagissent pour donner une floculation de réseau dans lequel les particules d'amidon sont piégées. Le papier ainsi obtenu a une qualité améliorée de rétention de l'amidon.

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