Title:
A polyacrylamide system surface paper durability agent and a manufacturing method of paper
Document Type and Number:
Japanese Patent JP5920679
Kind Code:
B2
Abstract:
The purpose of the present invention is to provide: a polyacrylamide-type paper surface strength agent having an excellent paper strength-increasing effect; and a method for producing paper, which enables the provision of paper having excellent strength. A polyacrylamide-type paper surface strength agent characterized in that, when the viscosity of the paper surface strength agent is measured at rotational speeds of 12, 30 and 60 rpm using a B-type viscometer (solid material concentration: 20 mass%, temperature: 25˚C) and then an index corresponding to each of the viscosities measured at rotational speeds of 30 and 60 rpm relative to the index corresponding to the viscosity measured at a rotational speed of 12 rpm (i.e., 100) is calculated, an A value in a logarithmic approximation equation (Y = A×lnX+B) is -2 to -10, wherein Y represents each of the indexes and X represents a rotational speed at which Y is measured.
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Inventors:
Shinkuni Shigeki
Hideo Ibaraki
Hiroshi Suzuki
Hideo Ibaraki
Hiroshi Suzuki
Application Number:
JP2014548462A
Publication Date:
May 18, 2016
Filing Date:
November 20, 2013
Export Citation:
Assignee:
Star light pmc corporation
International Classes:
D21H21/18; D21H19/20
Domestic Patent References:
| JP2011246830A | 2011-12-08 | |||
| JPH11228641A | 1999-08-24 | |||
| JP2011246830A | 2011-12-08 | |||
| JPH11228641A | 1999-08-24 |
Attorney, Agent or Firm:
Naoki Fukumura