EP 1021382 A1 20000726 - THERMAL DIMENSIONAL STABILITY TREATMENT OF VITREOUS SHEET MATERIAL BY CONTACTING WITH A MOLTEN ALKALI METAL SALT
Title (en)
THERMAL DIMENSIONAL STABILITY TREATMENT OF VITREOUS SHEET MATERIAL BY CONTACTING WITH A MOLTEN ALKALI METAL SALT
Title (de)
BEHANDLUNG VON FLACHGLAS MIT GESCHMOLZENEM ALKALISALZ ZUR STEIGERUNG DESSEN THERMALER FORMSTABILITÄT
Title (fr)
TRAITEMENT D'UN MATERIAU VITREUX, AYANT POUR BUT DE LUI CONFERER UNE STABILITE DIMENSIONNELLE A LA CHALEUR, PAR CONTACT AVEC UN SEL D'UN METAL ALCALIN FONDU
Publication
Application
Priority
- BE 9800137 W 19980918
- GB 9720230 A 19970923
Abstract (en)
[origin: GB2329382A] A sheet of vitreous material for use as a substrate is produced by subjecting the sheet to chemical tempering with a molten alkali metal salt prior to any firing step or other heat treatment associated with the application of coating layers. The so-treated sheet has improved dimensional stability, such that wide ranges of heating and cooling applied by the heat treatment do not create an unacceptable amount of shrinkage of the vitreous material. Preferably the glass sheet is immersed in KNO3 for 4-72 hours at 400-500‹C before being slowly cooled in two stages.
IPC 1-7
IPC 8 full level
C03C 21/00 (2006.01)
CPC (source: EP KR)
C03C 21/002 (2013.01 - EP KR)
Citation (search report)
See references of WO 9915471A1
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 (publication)
GB 2329382 A 19990324; GB 9720230 D0 19971126; AU 9246398 A 19990412; CN 1121991 C 20030924; CN 1271335 A 20001025; EP 1021382 A1 20000726; JP 2001517599 A 20011009; KR 100347832 B1 20020807; KR 20010030654 A 20010416; TW 546263 B 20030811; WO 9915471 A1 19990401
DOCDB simple family (application)
GB 9720230 A 19970923; AU 9246398 A 19980918; BE 9800137 W 19980918; CN 98809436 A 19980918; EP 98944903 A 19980918; JP 2000512785 A 19980918; KR 20007003004 A 20000321; TW 87115502 A 19980917