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. 24, 2012
Filed:
Mar. 31, 2008
Shisei Goto, Tokyo, JP;
Takashi Yamaguchi, Tokyo, JP;
Tsukasa Oba, Tokyo, JP;
Masaki Ito, Tokyo, JP;
Koji Okomori, Tokyo, JP;
Shisei Goto, Tokyo, JP;
Takashi Yamaguchi, Tokyo, JP;
Tsukasa Oba, Tokyo, JP;
Masaki Ito, Tokyo, JP;
Koji Okomori, Tokyo, JP;
Nippon Paper Industries, Co. Ltd., Tokyo, JP;
Abstract
The present invention provides methods for producing a base paper for coated printing paper and a coated paper by neutral papermaking using a roll and blade gap former type paper machine including a drainage mechanism based on a drainage blade immediately downstream of initial drainage via a forming roll, comprising adding a cationic polyacrylamide-based material having a weight-average molecular weight of 10,000,000 or more determined by intrinsic viscosity measurement as a retention aid to a stock to convert it into paper. According to the present invention, the retention, formation and internal bond strength of the stock can be improved. In the present invention, an anionic microparticle and/or a coagulant can also be used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile