Float glass plate and method of manufacturing thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-017/00
C03B-013/00
C04B-035/00
C03C-003/091
C03B-018/02
C03C-003/093
출원번호
US-0483856
(2014-09-11)
등록번호
US-9512026
(2016-12-06)
우선권정보
JP-2012-057960 (2012-03-14)
발명자
/ 주소
Hayashi, Yasuo
Miyasaka, Satoshi
출원인 / 주소
ASAHI GLASS COMPANY, LIMITED
대리인 / 주소
Foley & Lardner LLP
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
The present invention relates to a float glass plate that is formed by continuously supplying a molten glass onto a molten metal in a bath and allowing the molten glass to flow on the molten metal, wherein the float glass plate satisfies the following expression (1) when, on a coordinate axis that i
The present invention relates to a float glass plate that is formed by continuously supplying a molten glass onto a molten metal in a bath and allowing the molten glass to flow on the molten metal, wherein the float glass plate satisfies the following expression (1) when, on a coordinate axis that is parallel to a through-thickness direction and has, as an origin, an arbitrary point on a principal surface which is positioned on the molten metal side in the bath among both principal surfaces of the float glass plate, a water concentration in glass at a coordinate x (μm) indicating a distance from the origin is represented by C(x) (mass ppm), the thickness of the float glass plate is represented by D (μm), a maximum value of the C(x) is represented by Ca (mass ppm), and a coordinate at which the C(x) is maximum is represented by Da (μm). Math.10.5∫0Da(Ca-C(x))ⅆxCa×D×100≦2.0(1)
대표청구항▼
1. A float glass plate that is formed by continuously supplying a molten glass onto a molten metal in a bath and allowing the molten glass to flow on the molten metal, wherein the float glass plate satisfies the following expression (1) when, on a coordinate axis that is parallel to a through-thickn
1. A float glass plate that is formed by continuously supplying a molten glass onto a molten metal in a bath and allowing the molten glass to flow on the molten metal, wherein the float glass plate satisfies the following expression (1) when, on a coordinate axis that is parallel to a through-thickness direction and has, as an origin, an arbitrary point on a principal surface which is positioned on the molten metal side in the bath among both principal surfaces of the float glass plate, a water concentration in glass at a coordinate x (μm) indicating a distance from the origin is represented by C(x) (mass ppm), the thickness of the float glass plate is represented by D (μm), a maximum value of the C(x) is represented by Ca (mass ppm), and a coordinate at which the C(x) is maximum is represented by Da (μm) [Math.1]0.5<∫0Da(Ca-C(x))ⅆxCa×D×100≦2.0.(1) 2. The float glass plate according to claim 1, wherein the thickness is 1.1 mm or less. 3. The float glass plate according to claim 1, wherein the maximum value of the water concentration is 470 mass ppm or more. 4. The float glass plate according to claim 1, which comprises an alkali-free glass that contains, by mass % in terms of oxides, SiO2: 50 to 66%,Al2O3: 10.5 to 24%,B2O3: 0 to 12%,MgO: 0 to 8%,CaO: 0 to 14.5%,SrO: 0 to 24%,BaO: 0 to 13.5%,MgO+CaO+SrO+BaO: 9 to 29.5%, andZrO2: 0 to 5%. 5. The float glass plate according to claim 4, which comprises an alkali-free glass that contains, by mass % in terms of oxides, SiO2: 58 to 66%,Al2O3: 15 to 22%,B2O3: 5 to 12%,MgO: 0 to 8%,CaO: 0 to 9%,SrO: 3 to 12.5%,BaO: 0 to 2%, andMgO+CaO+SrO+BaO: 9 to 18%.
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