| 摘要 |
PROBLEM TO BE SOLVED: To provide an extruded sheet foam to be suitably used in building for a heat insulation. SOLUTION: The extruded sheet foam which is obtained by melt kneading a mixture composed of a thermoplastic resin and a blowing agent in an extruder, and then extruding the resulting melt into a low pressure zone has a thermal conductivity at an average temperature of 20 deg.C of <=0.040 W/m.K (0.034 kcal/m.h. deg.C), a moisture permeance of <=200 gn/m2SPa, a quantity of deformation, when heated at 110 deg.C for 24 hours, of <=3%, and a compressive strength at a strain of 25% in the thickness direction of <=0.7 kgf/cm2.
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