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1. 发明授权

US3950476A Manufacture of unique synthetic film and yarn 失效
标题翻译：制造独特的合成膜和纱线
公开(公告)号：US3950476A
公开(公告)日：1976-04-13
申请号：US329315
申请日：1973-02-05
申请人： Wilhelmus Johannes Fontijn
发明人： Wilhelmus Johannes Fontijn
IPC分类号： B29C47/04 , D01D5/36 , D01D5/42 , B29F3/12
CPC分类号： D01D5/426 , B29C47/06 , D01D5/36 , B29C47/0021 , Y10S264/47
摘要： A synthetic film which comprises at least two unmixed polymeric components, at least one of the components occurring in the form of substantially endless threads in the longitudinal direction of the film. The threads have transverse dimensions that are smaller than the thickness of the film and are embedded in a basic mass of a different polymeric component.The process for producing such synthetic films includes the steps of arranging at least two polymeric components, in the liquid state, side by side in a particular order to form a single main stream; repeatedly dividing and doubling the main stream into a multi-layer stream; temporarily dividing the multi-layer stream in a direction transverse to the direction of the layers at least once into sub-streams on the order of magnitude of the layer thicknesses in situ, while retaining the continuity of flow of the multi-layer stream and then extruding the resulting stream containing a plurality of the sub-streams through a casting slit to form said film.Yarns and the like fibrillary products having a low fibril denier count are obtained from these films by removing the basic mass, e.g., by use of solvents or special heat treatment.
摘要翻译：一种合成膜，其包含至少两种未混合的聚合物组分，所述组分中的至少一种在所述膜的纵向方向上以基本上环状的螺纹的形式存在。螺纹具有小于膜的厚度的横向尺寸，并且嵌入在不同聚合物组分的基本质量中。

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