发明名称 |
Polyolefin foam beads having high density crust and method for manufacturing the same |
摘要 |
<p>Polyolefin foam bead having a high-density crust and a method for manufacturing the same are disclosed. The novel polyolefin foam bead having an surface layer (crust) which is higher in density than its inner structure can be manufactured by the method comprised of impregnating a polyolefin resin with a forming agent by stirring the mixture of the polyolefin resin particles, water and the foaming agent in a pressure vessel under heat, followed by diffusing out the foaming agent from the surface layer of the resin particle to decrease the concentration of the foaming agent in the surface layer. Thereafter, the polyolefin resin is foamed by discharging the resin particles to low pressure environment.</p> |
申请公布号 |
EP1132421(A2) |
申请公布日期 |
2001.09.12 |
申请号 |
EP20010300615 |
申请日期 |
2001.01.24 |
申请人 |
HOWTECH CORPORATION LTD. |
发明人 |
CHUNG, MOON JO;KIM, NAK JOONG |
分类号 |
C08J9/34;B29C44/34;C08J9/18;(IPC1-7):C08J9/18 |
主分类号 |
C08J9/34 |
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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