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:
Apr. 09, 2013
Filed:
Mar. 16, 2006
Yoshiharu Kimura, Kakogawa, JP;
Takao Sezaki, Kakogawa, JP;
Yuko Iijima, Tokyo, JP;
Koji Kutsuwa, Tokyo, JP;
Yoshiharu Kimura, Kakogawa, JP;
Takao Sezaki, Kakogawa, JP;
Yuko Iijima, Tokyo, JP;
Koji Kutsuwa, Tokyo, JP;
Harima Chemicals, Inc., Hyogo, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Abstract
There is provided a filled paper containing a coated filler obtained by coating a filler with a acrylamide copolymer (composite PAM) comprising (A) an anionic polysaccharide and (B) a cationic and/or an amphoteric acrylamide copolymer. The composite PAM is obtained, for example, by mixing the component (A) and the component (B). Since the filler is treated with a combination of the components (A) and (B) different from each other in charge properties and structure, suitable coagulation effect can be attained and the coated filler has excellent affinity for pulp slurry. Therefore, even in the case of a highly filled paper, a large paper strengthening effect can be attained by using a small amount of the chemical agent.