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1. (WO2001034531) FLAT GLASS TO BE TEMPERED
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/034531 International Application No.: PCT/JP2000/007881
Publication Date: 17.05.2001 International Filing Date: 09.11.2000
Chapter 2 Demand Filed: 27.04.2001
IPC:
C03C 3/087 (2006.01) ,C03C 3/095 (2006.01) ,C03C 23/00 (2006.01)
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
C
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
3
Glass compositions
04
containing silica
076
with 40% to 90% silica by weight
083
containing aluminium oxide or an iron compound
085
containing an oxide of a divalent metal
087
containing calcium oxide, e.g. common sheet or container glass
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
C
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
3
Glass compositions
04
containing silica
076
with 40% to 90% silica by weight
095
containing rare earths
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
C
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
23
Other surface treatment of glass not in the form of fibres or filaments
Applicants:
SETO, Hiromitsu [JP/JP]; JP (UsOnly)
YOSHII, Shigekazu [JP/JP]; JP (UsOnly)
NIPPON SHEET GLASS CO., LTD. [JP/JP]; 5-11, Doshomachi 3-chome Chuo-ku Osaka-shi Osaka 541-8559, JP (AllExceptUS)
Inventors:
SETO, Hiromitsu; JP
YOSHII, Shigekazu; JP
Agent:
SHIGENO, Tsuyoshi; Nissin Building 9th Floor 5-10, Shinjuku 2-chome Shinjuku-ku Tokyo 160-0022, JP
Priority Data:
11-32042311.11.1999JP
Title (EN) FLAT GLASS TO BE TEMPERED
(FR) VERRE PLAT A TREMPER
Abstract:
(EN) A flat glass to be tempered, characterized in that it forms, when it is subjected to thermal tempering treatment, a tempered glass having a thermal tempering coefficient, which is represented by a quotient obtained by dividing a surface compression stress (MPa) by a sheet thickness, of 35 to 75; and a composition of glass for the flat glass. The flat glass has preferably a thermal stress coefficient represented by a product of an average coefficient of linear expansion and a Young's modulus of 0.70 to 1.20 Mpa/?C. The flat glass can be used for producing a thin tempered flat glass which has a real thickness of 6 mm or less, preferably 3.1 mm or less, and exhibits a satisfactory surface compression stress without increasing the capacity of a tempering process to be used.
(FR) L'invention concerne un verre plat à tremper caractérisé en ce qu'il forme, lorsqu'on le soumet à un traitement de trempe thermique, un verre trempé présentant un coefficient de trempe thermique variant entre 35 et 75, ledit coefficient étant représenté par un quotient obtenu par division d'une contrainte de compression superficielle (Mpa) au moyen d'une épaisseur de feuille. L'invention concerne également une composition de verre destinée à ce verre plat. Ledit verre plat présente de préférence un coefficient de contrainte thermique représenté par le produit d'un coefficient moyen d'expansion linéaire et d'un module de Young variant entre 0,70 et 1,20 Mpa/°C. Ce verre plat peut servir à produire un verre plat trempé de type fin possédant une épaisseur réelle inférieure ou égale à 6 mm, de préférence inférieure ou égale à 3,1 mm, et présentant une contrainte de compression superficielle satisfaisante sans qu'il soit nécessaire de recourir à une opération de trempe plus complexe.
Designated States: CN, JP, US, VN
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)