Thermally insulating glass material functioning as a...

C - Chemistry – Metallurgy – 03 – B

Patent

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C03B 19/08 (2006.01) C03C 11/00 (2006.01)

Patent

CA 2595504

Thernally insulating recycle glass material functioning as a capillary water suction barrier and method for its manufacture. The glass raw material (2, 3) contains impurities from the group comprising ceramics, porcelain, stone, plastic, and paper, in the presence of an activator to facilitate foaming of the glass. The method comprises at least two steps, namely a preheating step (8) in which the raw material is heated to a temperature in the range 500 - 700 oC to reduce the amount of detrimental contaminations and a foaming step (9) in which the material is heated to a temperature in the range 900 - 980 oC in which the glass is foamed and forms a structure of closed pores. Impurities/ contaminations can be present in an amount of up to 10 % by weight of the glass. Preferably the method comprises a tempering step (7) prior to the preheating step (8).

L~invention concerne un matériau de verre de recyclage isolant thermiquement fonctionnant comme barrière d~aspiration d~eau capillaire et un procédé de fabrication de celui-ci. Le matériau brut de verre (2, 3) contient des impuretés provenant du groupe englobant les céramiques, la porcelaine, la pierre, le plastique et le papier, en présence d~un activateur pour faciliter le moussage du verre. Le procédé comprend au moins deux phases, à savoir une phase de préchauffage (8) dans laquelle on chauffe le matériau brut à une température comprise entre 500 et 700 oC pour réduire la quantité de contaminations néfastes et une phase de moussage (9) dans laquelle le matériau est chauffé à une température comprise entre 900 et 980 oC dans laquelle le verre est moussé et forme une structure de pores fermés. Les impuretés/les contaminations peuvent être présentes dans une quantité allant jusqu~à 10 % en poids du verre. De préférence, le procédé comprend une phase de trempe (7) avant la phase de préchauffage (8).

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