发明名称 |
EXPANDED STYRENE RESIN BEADS |
摘要 |
<p>Expanded styrene resin beads from which an in-mold expanded-bead molding having excellent fusion bonding among the expanded beads can be produced through a short cooling time by in-mold molding and which can attain an improvement in molding cycle. The expanded styrene resin beads are made of a styrene resin as the base resin and have an average bead diameter of 0.5-10 mm and an apparent density of 0.013-0.15 g/cm 3 . The expanded beads are characterized in that the expanded beads each has many dimples having a maximum diameter of 5-100 µm in the surface and that when the expanded beads are secondarily expanded under the conditions of a heating steam temperature of 107°C and a heating time of 120 seconds, then the secondary expansion ratio determined by dividing the apparent density of the expanded beads before the secondary expansion (g/cm 3 ) by the apparent density of the expanded beads after the secondary expansion (g/cm 3 ) satisfies the relationship (1). Secondary expansion ratio ‰¤ -7.00 x {apparent density of expanded beads before secondary expansion (g/cm 3 )} + 1.61 (1)</p> |
申请公布号 |
EP2208752(A1) |
申请公布日期 |
2010.07.21 |
申请号 |
EP20080844702 |
申请日期 |
2008.10.09 |
申请人 |
JSP CORPORATION |
发明人 |
SHIMA, MASAOMI;HARAGUCHI, KENJI;TAMURA, TADASHI |
分类号 |
B29C44/44;B29C44/34;C08J9/16 |
主分类号 |
B29C44/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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