| 摘要 |
PURPOSE: A method for producing a core of a vacuum adiabatic material is provided to produce the core of the vacuum adiabatic material having an opening type cell at a low price. CONSTITUTION: A frame(20) is heated at a certain temperature. A quantity of foaming solution(B) compared to the volume of the frame is injected in the heated frame. A micro cell formed by the reaction of polyurethane of the foaming solution is formed into an opened cell by natural pressurization. A polyurethane adiabatic material is separated. Herein, the closed type cell is equally opened by the physical pressure between the cells in a foaming process. Accordingly, production costs of a core of a vacuum adiabatic material are saved without adding an expensive cell opener.
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