发明名称 |
Process for preparing polyolefin pre-expanded particles |
摘要 |
<p>To provide a process for preparing polyolefin resin pre-expanded particles which enables to prepare pre-expanded particles having lower fluctuation in expansion ratios. Polyolefin resin pre-expanded particles are prepared by a process comprising steps of dispersing polyolefin resin particles into an aqueous dispersion medium in an autoclave; heating the resin particles to temperature of at least the softening point of the polyolefin resin and pressuring the same; releasing said resin particles from the autoclave through a release port into an atmosphere of lower pressure than the inner pressure of the autoclave; thereby pre-expanding the resin particles, wherein at the releasing step, the resulting pre-expanded particles are contacted with gas of at least 60 DEG C and collided with a collision board or a container wall disposed at a distance of 5 mm < D, D representing the distance from the release port to the collision board or the container wall. <IMAGE></p> |
申请公布号 |
EP1262513(A1) |
申请公布日期 |
2002.12.04 |
申请号 |
EP20020011673 |
申请日期 |
2002.05.31 |
申请人 |
KANEKA CORPORATION |
发明人 |
YANAGIHARA, YUTAKA;EBISUI, MASAHIDE;AKAMATSU, NARUHIKO |
分类号 |
B29C44/34;C08J9/18;C08L23/08;C08L23/10;(IPC1-7):C08J9/00;C08L23/00 |
主分类号 |
B29C44/34 |
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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