| 摘要 |
A process for continuously preparing a polyolefin foam molding, wherein expanded polyolefin resin beads are fed between a pair of upper and lower endless belts continuously traveling along a pair of opposing upper and lower surfaces, respectively, within a passage defined by structural members and rectangular in section, the expanded beads feed being then successively passed through a heating zone and a cooling zone within the passage. The expanded polyolefin resin beads have a core-coat structure in which the core is in an expanded state and comprises a crystalline polyolefin resin, while the coat is in a substantially unexpanded state and surrounds the core. The coat comprises a crystalline polyolefin polymer which is lower in melting point by at least 15° C. than that of the crystalline polyolefin resin or a substantially non-crystalline polyolefin polymer which is lower in Vicat softening point by at least 15° C. than that of the crystalline polyolefin resin.
|
