Global patent index - EP 0969141 A1

EP 0969141 A1 2000-01-05 - Process for producing satinated paper

Title (en)

Process for producing satinated paper

Title (de)

Verfahren zur Erzeugung von satiniertem Papier

Title (fr)

Procédé pour la préparation de papier satiné

Publication

EP 0969141 A1 (DE)

Application

EP 99108941 A

Priority

DE 19828952 A

Abstract (en)

In the production of satinized paper, the paper fibers are charged at the preparation stage (1) so that introduced matter (5) builds up in their hollow zones The process, in combination with the satinizing stage (3) using a pressure of at least 30 N/mm<2>, gives a polished paper with a high optical effect. The introduced matter disperses into the interior of the paper fibers to increase their resistance to compression. The introduced material (5) can also build up solid layers within the fibers which line or partially fill the inner fiber zones. During satinizing, the pressure fractures the solid layers, to form a barrier layer between the fiber walls. The introduced material (5) contains calcium carbonate, which is crystallized within the fibers. The material can be composed of at least two components, added to the fiber suspension at different times. The fiber suspension (S) is formed from used paper, with the ink separated and removed. At the satinizing stage (3), pressure is applied at least at 60 N/mm<2> by a super calender.

Abstract (de)

Das Verfahren dient der Erzeugung von hochwertigem satinierten Papier und enthält die drei Verfahrensabschnitte Stoffaufbereitung (1), Papierbildung (2) und Satinageprozeß (3). Erfindungsgemäß werden die bei der Durchführung des Verfahrens verwendeten Papierfasern einer Faserbeladung unterzogen, bei der in den Hohlräumen der Fasern Stoffe eingelagert werden, die die Kompressibilität der Fasern verringert. In Kombination mit dem Satinageprozeß (3) kann dann ein Papier mit besonders hoher optischer Qualität erzeugt werden. <IMAGE>

IPC 1-7 (main, further and additional classification)

D21C 9/00; D21H 11/16; D21H 25/00

IPC 8 full level (invention and additional information)

D21C 9/00 (2006.01); D21H 11/16 (2006.01); D21H 25/00 (2006.01)

CPC (invention and additional information)

D21H 11/16 (2013.01); D21C 9/004 (2013.01); D21H 25/005 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT DE FI

EPO simple patent family

EP 0969141 A1 20000105; EP 0969141 B1 20030723; AT 245723 T 20030815; DE 19828952 A1 20000105; DE 19828952 B4 20050414; US 6264794 B1 20010724

INPADOC legal status

2010-06-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2003-07-23 [AK] DESIGNATED CONTRACTING STATES:

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2001-04-04 [RAP1] TRANSFER OF RIGHTS OF AN EP APPLICATION

- Owner name: VOITH PAPER PATENT GMBH

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