The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 1993
Filed:
May. 15, 1991
Applicant:
Inventors:
Kenichi Akune, Tokyo, JP;
Naotaka Watanabe, Tokyo, JP;
Yukihiro Inomiya, Tokyo, JP;
Hiroshi Itoda, Kanagawa, JP;
Takeo Arai, Kanagawa, JP;
Reiko Funato, Kanagawa, JP;
Assignee:
Mitsui-Cyanamid, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
1621682 ; 1621683 ;
Abstract
Disclosed is a paper-making process for preparing a paper from a paper stock suspension, which is characterized by adding water-swellable cationic polymer particles optionally together with an acrylamide polymer to the suspension as a retention-improving agent. In the process, the stability of the retention even under high shearing force in the paper-making step is improved, the load for recovery of white water and treatment of waste water drained is reduced and the abrasion of paper-making wires is reduced.