| 摘要 |
A phenol resin foamed plate contains hydrocarbon and/or chlorinated aliphatic hydrocarbon, in which an average cell diameter is in a range of 5µm or more and 200µm or less, a void area ratio is 5% or less in its cross section, a density is 15 kg/m 3 or more and 26 kg/m 3 or less, and when compression is made by a 10% displacement in a direction perpendicular to the thickness direction, a recovery rate 1 minute after release of this compression is 96.0% or more and 98.5% or less and a degree of change in recovery rates C is 0.030%/hr or more and 0.060%/hr or less. |
