Method for cleaning solid surface with a mixture of pure water and calcium carbonate particles
AssigneeHitachi, Ltd.
InventorsMasahiro Watanabe, Mitsuyoshi Otake, Megumi Hamano, Yoshiharu Takizawa
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Abstract
A method for cleaning a solid surface which is effective for a substance to be cleaned having a complicated structure and which uses no solvent such as CFC or the like which is harmful to the environment of the earth. A cleaning liquid is obtained by mixing insoluble particles in a liquid and brought into an eddy-flow state so that a surface to be cleaned can be uniformly cleaned.
Claims4
A method for cleaning a solid surface containing solid fat or oil thereon by bringing a cleaning liquid into contact with said solid surface to be cleaned, the method comprising the steps of preparing a cleaning liquid of a mixture of pure water and insoluble calcium carbonate particles in a cleaning bath, heating the cleaning liquid up to a temperature near the softening point of the solid fat or oil, and causing an eddy-flow in the cleaning liquid in said cleaning bath so that the softened solid fat or oil is removed from said solid surface.
Dependencies are inferred from the claim text.