| 摘要 |
PURPOSE:To produce a heat insulating material excellent in heat insulating effect to effectively put the same to practical use by solving such a problem that a material is wasted by the generation of a skin layer having no air bubbles or the shape of air bubbles exerting effect on heat insulating effect can not by controlled in the production of the heat insulating material used in a refrigerator for heat insulation and cooling. CONSTITUTION:A container 6 having an opening part 7, the air permeable bottom part 8 provided to the other end opposed to the opening part 7 thereof and an air permeable wall body 9 provided to the periphery thereof is filled with a foamable resin and, simultaneously with the start of curing reaction, the pressures of the opening part 7 and air permeable bottom part 8 of the container 6 and the pressure around the air permeable wall body 9 are respectively controlled to form open cells in the foamable resin 10. By this method, open cells having long and snort axes of a necessary shape can be formed and a heat insulating material excellent in heat insulating and cooling effect can be produced without wastefulness. |
