申请人:TEIJIN LIMITED
公开号:EP0026554A1
公开(公告)日:1981-04-08
A process for producing a foamed article of an aromatic polyester, especially a large-sized foamed article of aromatic polyester having a high expansion ratio, comprises mixing an aromatic polyester, a polyepoxy compound, a compound of a metal of Group la, IIa or IIIa of the periodic table and a blowing agent in a melt extrusion molding machine (1) optionally with a fibrous filler while introducing the blowing agent thereinto under pressure, extruding the molten mixture from the molding machine (1), further expanding the foamed unsolidified extrudate (10) in a sizing device (15), the interior of which being maintained at reduced pressure, and solidifying it by cooling in an atmosphere maintained at reduced pressure. The resulting aromatic polyester foamed article has numerous fine cells having uniform volumes, shapes and distribution.
一种生产芳香族聚酯发泡制品,特别是具有高膨胀率的大型芳香族聚酯发泡制品的工艺,包括在熔融挤压成型机(1)中混合芳香族聚酯、聚环氧化合物、元素周期表中la、Ⅱa或Ⅲa族金属的化合物和发泡剂,也可选择纤维状填料,同时在压力下将发泡剂导入其中;从成型机(1)中挤出熔融混合物;在定型装置(15)中进一步膨胀发泡的未固化挤出物(10),定型装置的内部保持在减压状态;在保持减压的气氛中冷却固化。 得到的芳香族聚酯发泡制品具有许多体积、形状和分布均匀的细孔。