Title:
一回コーティングLWC印刷紙製造用方法、ペーパーマシン及び原紙
Document Type and Number:
Japanese Patent JP2004530063
Kind Code:
A
Abstract:
A paper machine for the manufacture of LWC printing paper which is coated once has a headbox (100), a gap former (200), a press section (300) having at least one extended nip press, a pre-dryer section (400) in which a web (W) is dried applying at least cylinder drying (R1-R7), a precalender (500) in which the web (W) is pre-calendered, at least one portion which is formed of a coating station (600) and an after-dryer section (700) and in which the web (W) is coated on both sides applying a film coating method or a non-contact coating method and dried applying at least contact-free drying (710), an end calender (800) in which the web (W) is calendered, and a reel-up (900) in which the web (W) is reeled. The pre-calender (500) is a calender which is provided with at least one nip (NE1, NE2) and in which both surfaces of the web are in contact with a calendering backup surface having a surface temperature of at least 200° C., advantageously at least 250° C., the total length of the nip or nips of the pre-calender is in a range of 15-600 mm, advantageously in a range of 30-600 mm, the linear load of each nip is in a range of 50-500 kN/m, advantageously in a range of 100-400 kN/m, and the moisture content of the web before the first nip of the pre-calender (500) is in a range of 5-20%, advantageously in a range of 6-15%.
Inventors:
Kolhonen, Hannes
Gron, Johann
Todlovic, Alexander
Reema Tainen, Heikki
Gron, Johann
Todlovic, Alexander
Reema Tainen, Heikki
Application Number:
JP2003505413A
Publication Date:
September 30, 2004
Filing Date:
June 17, 2002
Export Citation:
Assignee:
Metso Paper Inc.
International Classes:
D21H23/30; D21F3/02; D21F9/00; D21F9/02; D21G1/00; D21H25/14; (IPC1-7): D21H23/30; D21F9/02
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Hiroshi Kida
Shinsuke Onuki
Tadashige Ito
Hiroshi Kida