Patent · US Active

Filler for papermaking process

US9156990B2 · kind B2 · utility

0Cited by

20References

38Claims

0Family size

Assignee

EKA CHEMICALS AB · SE

Inventors

Peter Marten Van Der Horst · Arnhem, NL
Erik Sanne · Timrå, SE
Kjell Andersson · Bissenkamp, SE
Cherryleen Garcia-Lindgren · Bissenkamp, SE
Marie-Louise Wallberg · Bissenkamp, SE
Sune Wännström · Bissenkamp, SE

Key dates

Filing date	Dec 21, 2004
Grant date	Oct 13, 2015
Priority date	—
Expiry date	Dec 4, 2028

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H17/26
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The present invention relates to a filler comprising calcium salt and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the filler is substantially free from fibers or fibrils of cellulose or lignocellulose. The invention also relates to a filler comprising calcium salt and a cellulose derivative having a degree of substitution of net ionic groups up to about 0.65, wherein the cellulose derivative contains cationic groups.

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