|発明の名称||MANUFACTURING METHOD OF HEAT INSULATION PIPE, FORMING METHOD OF HEAT INSULATION FILM, HEAT INSULATION PIPE AND HEAT INSULATION FILM|
PROBLEM TO BE SOLVED: To provide a manufacturing method of a heat insulation pipe having an excellent heat insulation characteristic by a comparatively simple technique, a forming method of a heat insulation film, the heat insulation pipe and the heat insulation film.
SOLUTION: A pipe body 1 which is an object to be formed with a heat insulation film is accommodated in a furnace 10. Then, an electric charge is imparted to a hollow or porous silica particle that is a raw material for forming the heat insulation film, and a potential difference is imparted between the silica particle and the pipe body 1. Then, the silica particle imparted with the electric charge is injected to a heat insulation film forming face of the pipe body 1 which is accommodated in the furnace 10. A process in which the silica particle is injected includes a process in which a surface of the heat insulation film in formation is set at a temperature at which low-temperature type quartz (α-quartz) stably exists, and the inside of the heat insulation film in formation is set at a temperature at which high-temperature type quartz (β-quartz) stably exists.
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