| 摘要 |
PROBLEM TO BE SOLVED: To obtain a good thermal insulating property by layering an elastic sheet made of a polyolefin resin foamed sheet on one side of a hard foamed plate made of a polystyrene resin foamed plate and forming the selvage of the elastic sheet. SOLUTION: An elastic sheet made of a polyolefin resin with a thickness of 1 to 10 mm, is layered on one side of a hard foamed plate 2 made of a polystyrene resin foamed plate whose thermal conductivity is less than 0.035 Kcal/m.h. deg.C. And then the thermal conductivity of the elastic sheet 3 is less than 0.040 Kcal/m.h. deg.C, and a thermal insulating material 1 where the elastic sheet 3 protrudes toward at least one side of the hard foamed plate 2 and forms selvages 4, is molded. And then to arrange the thermal insulating material 1 between supporting members 6, the selvages 4 are bent toward the hard foamed plate 2 side and the layered sides of the elastic sheet 3 are inserted into between the supporting members 6. Therefore, a high thermal insulating property can be shown while preventing the thickness of the thermal insulating material from increasing.
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