Patent · US Expired

Method for determining resin particles in paper stocks

US5486904A · kind A · utility

4Cited by

3References

5Claims

0Family size

Assignee

BASF SE

Inventors

Dieter Horn · Heidelberg, DE
Erik Lueddecke · Mutterstadt, DE
Alfred Gierulski · Neckargemünd, DE
Thomas Kroehl · Mainz, DE
Primoz Lorencak · Ludwigshafen, DE

Key dates

Filing date	Jun 7, 1993
Grant date	Jan 23, 1996
Priority date	—
Expiry date	Jun 7, 2013

Classification

Technology area (CPC G)Physics
CPC primaryG01N2021/6439
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The free resin particles which present problems in papermaking are determined according to number and size in order to bind them to the wood fibers by adding assistants and hence render them harmless. For this purpose, a paper stock suspension is prepared and the resin particles are separated from said suspension and then marked with a fluorescent dye and isolated. The light signals emitted by the individual resin particles after excitation are detected for determination of number and size.

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