Heat resisting vacuum heat insulating material

Abstract

The present invention provides a heat-proof vacuum insulation material, having an outer housing body composed of an internal surface material with smaller coefficient of linear thermal expansion than that of an outer surface material, such that opening interstice may not form between the outer surface of the wall surface and the internal surface of the heat-proof vacuum insulation material, which holds adiathermancy of a heating chamber. A first component (11) configured on a high temperature side is composed of material with smaller coefficient of linear thermal expansion than that of material of a second component (12) configured on a low-temperature side, after a core is accommodated between the first component (11) and the second component (12), the inside become vacuum state, such that large difference may not generate between the heat distortion of the first component (11) and that of the second component (12), thereby preventing reduction of adiathermancy of the heating chamber (20) caused by separation of the heat-proof vacuum insulation material (1) from the heat-proof insulation material (21) after deformation in thickness direction.

Description

technical field [0001] The present invention relates to a heat insulating material arranged on the outside of a high-temperature processing device such as a heating device, and particularly relates to a heat-resistant vacuum heat insulating material in which the inside of a sealed outer casing made of a heat-resistant material containing a heat insulating body is in a vacuum state. Background technique [0002] As an example, the manufacturing process of the glass substrate for flat panel display devices includes the heat treatment which heats the glass substrate which is a processing object at predetermined temperature (for example, about 220 degreeC - 230 degreeC). In this heat treatment, a heating device is used which has a heating chamber whose walls are made of a heat-resistant heat insulating material, and raises the temperature of the heating chamber containing the object to be processed to a temperature suitable for the heat treatment of the object to be processed. ...

AI Technical Summary

Problems solved by technology

However, the vacuum heat insulating material used for consumer electrical equipment is obtained by vacuum-exhausting and sealing the inside of a bag-shaped container containing a heat-insulating material molded body and a heat-sealable sheet. On the outside of the heating device for heat treatment at ~100°C, the bag-shaped container will melt and rupture, and the vacuum state cannot be maintained.

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