Patent · US Active

Method for producing paper with a high substance weight

US8152962B2 · kind B2 · utility

9Cited by

14References

11Claims

0Family size

Assignee

BASF SE

Inventors

Oliver Koch · Eppelheim, DE
Rainer Blum · Ludwigshafen, DE
Ron Van Dijk · Apeldoorn, NL

Key dates

Filing date	Dec 1, 2005
Grant date	Apr 10, 2012
Priority date	—
Expiry date	May 6, 2028

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/455
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A process for producing paper of high basis weight by draining a paper pulp on a wire in the presence of a combination of at least two polymers as a retention and drainage aid system, forming sheets, and drying the sheets, which comprises forming the sheets in the absence of finely divided inorganic flocculants and using as retention and drainage aids(a) at least one amino-containing polymerand(b) at least one branched cationic polyacrylamide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.