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1. (WO2018123505) ALKALI-FREE GLASS SUBSTRATE PRODUCTION METHOD
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2018/123505 International Application No.: PCT/JP2017/044085
Publication Date: 05.07.2018 International Filing Date: 07.12.2017
IPC:
C03B 5/027 (2006.01) ,C03B 5/225 (2006.01) ,C03B 17/06 (2006.01) ,C03C 1/02 (2006.01)
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
B
MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
5
Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
02
in electric furnaces
027
by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
B
MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
5
Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
16
Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
225
Refining
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
B
MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
17
Forming glass by flowing out, pushing-out, or drawing downwardly or laterally from forming slits or by overflowing over lips
06
Forming glass sheets
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
1
Ingredients generally applicable to manufacture of glasses, glazes or vitreous enamels
02
Pretreated ingredients
Applicants: NIPPON ELECTRIC GLASS CO., LTD.[JP/JP]; 7-1, Seiran 2-chome, Otsu-shi Shiga 5208639, JP
Inventors: TOMAMOTO Masahiro; JP
KANAYA Hitoshi; JP
HASEGAWA Toru; JP
SAKURABAYASHI Toru; JP
Priority Data:
2016-25113426.12.2016JP
2017-11141906.06.2017JP
Title (EN) ALKALI-FREE GLASS SUBSTRATE PRODUCTION METHOD
(FR) PROCÉDÉ DE PRODUCTION DE SUBSTRAT EN VERRE EXEMPT D'ALCALI
(JA) 無アルカリガラス基板の製造方法
Abstract:
(EN) The present invention provides an alkali-free glass substrate production method with which it is possible to produce an alkali-free glass substrate of a higher strain point by lowering the β-OH value of the glass. This method is for continuously producing an alkali-free glass substrate based on SiO2-Al2O3-RO (RO represents at least one selected from among MgO, CaO, BaO, SrO, and ZnO), and is characterized by comprising: a step for preparing a raw material batch that contains a tin compound but does not substantially contain any arsenic compound or antimony compound; a step for electrically melting the prepared raw material batch in a melting furnace that is capable of passing a current and applying heat via a molybdenum electrode; and a step for shaping the molten glass into a plate form by a down-draw process.
(FR) La présente invention concerne un procédé de production de substrat en verre exempt d'alcali grâce auquel il est possible de produire un substrat en verre exempt d'alcali ayant un point de trempe supérieur en abaissant la valeur β-OH du verre. Ce procédé permet de produire en continu un substrat en verre exempt d'alcali à base de SiO2-Al2O3-RO (RO représente au moins un élément choisi parmi MgO, CaO, BaO, SrO et ZnO), et est caractérisé en ce qu'il comprend : une étape permettant de préparer un lot de matière première qui contient un composé d'étain mais qui ne contient pratiquement pas de composé d'arsenic ni de composé d'antimoine; une étape permettant de faire fondre électriquement le lot de matière première préparé dans un four de fusion qui permet de faire passer un courant et d'appliquer de la chaleur par l'intermédiaire d'une électrode au molybdène; et une étape permettant de façonner le verre fondu en une forme de plaque par un processus d'étirage vers le bas.
(JA) ガラスのβ-OH値を低下させて、より歪点の高い無アルカリガラス基板を製造し得る無アルカリガラス基板の製造方法を提供する。SiO-Al-RO(ROはMgO、CaO、BaO、SrO及びZnOの1種以上)系の無アルカリガラス基板を連続的に製造する方法であって、錫化合物を含有し、且つヒ素化合物及びアンチモン化合物を実質的に含まないように原料バッチを調製する工程と、調製した原料バッチを、モリブデン電極による通電加熱が可能な溶融窯で電気溶融する工程と、溶融されたガラスをダウンドロー法により板状に成形する工程とを含むことを特徴とする。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)