Global Patent Index - EP 1020560 A2

EP 1020560 A2 2000-07-19 - Process and apparatus for impregnating and coating paper

Title (en)

Process and apparatus for impregnating and coating paper

Title (de)

Verfahren und Anlage zum Imprägnieren und Beschichten von Papier

Title (fr)

Procédé et dispositif d'imprégnation et de couchage de papier

Publication

EP 1020560 A2 (DE)

Application

EP 99121634 A

Priority

DE 19901525 A

Abstract (en)

A band of paper is coated on the front by liquid resin and fine abrasive, especially corundum, and is then hardened, all in accordance with known principles. In the new process a further coating of resin, free of particles, is applied to the front and hardened. An Independent claim is included for a plant carrying out the process. This includes the stations: impregnation, single-sided coating, drying (5), coating (6) and final drying (8). Preferred features: In the second coating, preferably 10-80 g/m<2> of resin is applied. The back is coated, preferably with the same weight of resin. During initial coating, the band has a residual moisture of 8-17%. Final drying reduces this to 4-9%. The plant also includes patterned rollers (21, 24) and a further coating section (7). A further variant of the plant, based on the foregoing principles, is described.

Abstract (de)

Papiere, die für die Herstellung von abriebfesten Laminaten bestimmt sind, werden mit einer Harzmasse beschichtet, welche feinkörniges abrasives Material enthält. Die abrasiven Partikel können bei der Weiterverarbeitung der Papiere einen erhöhten Verschleiß an Maschinen und Werkzeugen bewirken, insbesondere an den beim Heißpressen eingesetzten Pressblechen. Gemäß der Erfindung wird die vorgetrocknete Beschichtung mit einer Deckschicht aus flüssigem Harz kaschiert, welches von abrasiven Partikeln frei ist. Anschließend wird die Papierbahn fertig getrocknet. <IMAGE>

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

D21H 23/70

IPC 8 full level (invention and additional information)

D21H 23/70 (2006.01); D21H 19/82 (2006.01)

CPC (invention and additional information)

D21H 23/70 (2013.01); D21H 19/826 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 1020560 A2 20000719; EP 1020560 A3 20020327; EP 1020560 B1 20080312; AT 389062 T 20080315; CY 1108132 T1 20140212; DE 19901525 A1 20000720; DE 19901525 C2 20010208; DE 59914686 D1 20080424; ES 2303730 T3 20080816; US 6231670 B1 20010515