| 摘要 |
<p>A styrene resin foaming material has a density ς of 0.02-0.008 g/cm3, a melt tension of the styrene resin of 5-40 gf. The relation between an average cell diameter d(νm) and the density ς is given by (1). The relation between a thermal conductivity μ(kcal/m.h. °C) and the density ς is given by (2): μ ≤ 0.0001 x 1/ς + 0.023. Accordingly, the styrene resin foaming material has a low material conductivity and excellent heat insulating property in spite of a low density (high ratio expansion foam) thereof.</p> |
