Global Patent Index - EP 1030766 A1

EP 1030766 A1 2000-08-30 - STEAM PRE-HEATING IN ORIENTED STRAND BOARD PRODUCTION

Title (en)

STEAM PRE-HEATING IN ORIENTED STRAND BOARD PRODUCTION

Title (de)

DAMPFVORHEIZUNG BEI DER HERSTELLUNG VON PLATTEN AUS ORIENTIERTEN FASERN

Title (fr)

PRECHAUFFAGE A LA VAPEUR DANS LA FABRICATION DE PANNEAUX A COPEAUX ORIENTES

Publication

EP 1030766 A1 (EN)

Application

EP 98958486 A

Priority

  • US 9823699 W
  • US 96894697 A
  • US 7896298 A

Abstract (en)

[origin: WO9924233A1] Oriented strand board (10) is produced using a continuous belt press (22) and using an isocyanate binder with steam exposure of the mat (18) of wood material prior to entry into the press. The steam exposure provides moisture which softens wood fibers and enhances lignin flow in the mat. In addition, the moisture reacts with isocyanate binder to produce polyureas from the isocyanate binder (e.g. the preferred binder is pMDI); thereby reducing the cure conditions (i.e. temperature, pressure and time) required for the press to fuse the mat and binder together. The isocyanate binder also reacts with hydroxyl groups in the cellulose and hemicellulose strands of the wood material to allow both chemical and physical bonds to be created with the wood material. The oriented strand board exiting the press has a higher moisture content and more resistant thickness swell under humid conditions.

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

B29C 43/30; B27N 3/00; B27N 3/14; B27N 3/18; B32B 5/12; B32B 31/20

IPC 8 full level (invention and additional information)

B27N 3/14 (2006.01); B27N 3/00 (2006.01); B27N 3/02 (2006.01); B27N 3/04 (2006.01); B27N 3/18 (2006.01); B27N 3/24 (2006.01); B32B 21/02 (2006.01); B32B 21/13 (2006.01)

CPC (invention and additional information)

B32B 21/02 (2013.01); B27N 3/002 (2013.01); B27N 3/04 (2013.01); B27N 3/18 (2013.01); B27N 3/24 (2013.01); B32B 21/13 (2013.01); B32B 37/00 (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

EPO simple patent family

WO 9924233 A1 19990520; AR 017592 A1 20010912; AU 1452599 A 19990531; AU 731505 B2 20010329; BR 9814024 A 20000926; CA 2308547 A1 19990520; CA 2308547 C 20080212; EP 1030766 A1 20000830; EP 1030766 A4 20050202; ID 25906 A 20001109; JP 2001522735 A 20011120; JP 4215392 B2 20090128; MY 114970 A 20030228; NZ 505090 A 20020531; PL 187489 B1 20040730; PL 340792 A1 20010226

INPADOC legal status


2010-05-12 [18R] REFUSED

- Effective date: 20091130

2005-02-02 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20041222

2005-02-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 29C 43/30 A

2005-02-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 32B 5/12 B

2005-02-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 32B 31/20 B

2005-02-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 27N 3/14 B

2005-02-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 27N 3/18 B

2005-02-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 27N 3/00 B

2000-08-30 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000510

2000-08-30 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE