公开(公告)号：US4483809A

公开(公告)日：1984-11-20

申请号：US458134

申请日：1983-01-14

申请人： Masao Ando ,  Kenkichi Tanaka ,  Kiroku Sato

发明人： Masao Ando ,  Kenkichi Tanaka ,  Kiroku Sato

IPC分类号： C08J9/22 ,  B29K23/00 ,  C08J9/228 ,  C08J9/232 ,  B29D27/00

CPC分类号： C08J9/232 ,  C08J9/228 ,  C08J2323/02 ,  Y10S264/05 ,  Y10S264/15 ,  Y10S264/18

摘要： The present invention relates to a process for preparing a polyolefin foam by heat-molding pre-expanded beads of an expandable polyolefin resin containing a foaming agent in a mold, said process being improved in preparing beads having a peak expansion rate at pre-expansion equal to 1.3 to 3 times the expansion rate of beads to be packed into the mold, adjusting the beads to a pre-expansion rate depending on an expansion rate of the desired foam, and packing and molding the pre-expanded beads in a mold without any further addition of expandability thereto. The polyolefin foam prepared by the process of the present invention is evenly fused to the interior and is less liable to shrink or deform.

摘要翻译： 本发明涉及一种制备聚烯烃发泡体的方法，该方法是通过在模具中热塑含有发泡剂的可发性聚烯烃树脂的预发泡珠粒，所述方法改进了制备具有在预膨胀前的峰膨胀率相等的珠粒 至要填充到模具中的珠的膨胀率的1.3至3倍，根据所需泡沫的膨胀率将珠粒调节至预膨胀速率，并将预发泡的珠粒包装并模制在模具中，而不需要任何 进一步添加可扩展性。 通过本发明的方法制备的聚烯烃泡沫体与内部均匀地熔合并且不易收缩或变形。