首页> 外国专利> MULTILAYER STRUCTURES HAVING ANNULAR PROFILES AND METHODS AND APPARATUS OF MAKING THE SAME

MULTILAYER STRUCTURES HAVING ANNULAR PROFILES AND METHODS AND APPARATUS OF MAKING THE SAME

机译:具有环形轮廓的多层结构及其制造方法和装置

摘要

Disclosed are multilayer film structures having annular profiles, and methods and apparatus of making the structures disclosed. The annular multilayer articles have a uniform thickness, at least four layers and comprise overlapped and non-overlapped circumferential areas; wherein the layer structure of the non-overlapped area is doubled in the overlapped layer. A method of making the structure includes providing a multilayer flow stream with at least four layers of thermoplastic resinous materials; feeding the multilayer flow stream to a distribution manifold of an annular die to form an annular multilayer flow stream; and removing the annular multilayer flow stream from the annular die to form the annular multilayer structure. Also disclosed is an apparatus, comprising: a feedblock, with optional layer multiplier, that provides a multilayer flow stream of at least four layers to the manifold of an annular die; and an annular die having at least one distribution manifold that extrudes a multilayer flow stream.
机译:公开了具有环形轮廓的多层膜结构,以及制造该结构的方法和设备。环形多层制品具有均匀的厚度,至少四层,并包括重叠的和不重叠的圆周区域。其中,非重叠区域的层结构在重叠层中加倍。一种制造该结构的方法,包括提供具有至少四层热塑性树脂材料的多层流;将多层流股进料至环形模具的分配歧管以形成环形多层流股;从环形模具中去除环形多层流,以形成环形多层结构。还公开了一种设备,该设备包括:带有可选的层倍增器的进料块,其向环形模具的歧管提供至少四层的多层流;环形模具具有至少一个分配歧管,该分配歧管挤出多层流。

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