Patent · US Expired

Method for producing paper, pulpboard and cardboard

US6303002A · kind A · utility

9Cited by

6References

5Claims

0Family size

Assignee

BASF SE

Inventors

Friedrich Linhart · Heidelberg, DE
Jaroslav Melzer · Ludwigshafen, DE
Hubert Meixner · Ludwigshafen, DE

Key dates

Filing date	Oct 15, 1999
Grant date	Oct 16, 2001
Priority date	—
Expiry date	Oct 15, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S162/04
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Paper, board and cardboard are produced from paper stocks which contain tacky impurities by the addition of surfactants and cationic polymers having a charge density of at least 1.5 meq/g (measured at pH 7) and a molar mass M.sub.w of the cationic polymers of at least 15,000 and drainage of the paper stocks with fixation of the tacky impurities in the paper produced.

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