| 摘要 |
<p>The present invention makes it possible to simply produce a noncrosslinked polyethylene resin expansion molded article whose dimensional shrinkage factor with respect to a metal mold is small, whose deformation is small, and whose surface stretches well, by arranging a noncrosslinked polyethylene resin expanded particle to have a bulk density BD in a range of not less than 10 g/L and not more than 100 g/L, the noncrosslinked polyethylene resin expanded particle being obtained by expanding a polyethylene resin particle whose density is in a range of not less than 0.920 g/cm 3 and not more than less than 0.940 g/cm 3 , the noncrosslinked polyethylene resin expanded particle having a shrinkage factor in a range of not less than 2 % and not more than 30 %, the shrinkage factor being obtained by the following formula (1): Shrinkage Factor = BD - VBD × 100 / VBD wherein: the BD of the noncrosslinked polyethylene expanded particle is a bulk density at 23 °C and at 0.1 MPa (at a normal atmospheric pressure); and the VBD of the noncrosslinked polyethylene expanded particle is a bulk density at 23 °C and at a reduced pressure of 0.002 MPa or less.</p> |
