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1. 发明授权

US06248445B1 Composite filament yarn and process and spinneret for manufacturing the same 失效
标题翻译：复合长丝纱及其制造方法及喷丝头
公开(公告)号：US06248445B1
公开(公告)日：2001-06-19
申请号：US08308639
申请日：1994-09-19
申请人： Yukio Yamakawa , Soichiro Tanaka , Koji Itonaga , Yasushi Nakai
发明人： Yukio Yamakawa , Soichiro Tanaka , Koji Itonaga , Yasushi Nakai
IPC分类号： D02G300
CPC分类号： D01F8/12 , D01D5/34 , Y10T428/2929 , Y10T428/2931 , Y10T428/2973
摘要： A polyamide/polyurethane composite filament yarn, contains a filament having a polyamide sheath component and a polyurethane eccentric core component exposed, through a neck portion of uniform width, on the surface of the filament. The filament is manufactured by a process comprising inserting, immediately before extruding from a spinneret orifice, a molten polyurethane flow, at an oblique angle from above, into a molten polyamide flow flowing down in a conduit, so that a small part of the polyurethane flow radially projects in a restricted width through the thinnest portion of the polyamide flowing flows down the inner wall of the conduit. For this process, an employable spinneret comprises a leading duct for a polyamide connected to an orifice via a vertical conduit, another leading duct for a polyurethane connected to an injection pipe obliquely extending therefrom, protruding into said conduit, opening immediately before said orifice and having a slit extending longitudinally at its under side along its entire protruded length.
摘要翻译：聚酰胺/聚氨酯复合长丝纱包含具有聚酰胺鞘组分和聚氨酯偏心芯组分的长丝，通过宽度均匀的颈部暴露在细丝表面上。丝线通过以下方法制造，该方法包括将从喷丝孔口挤出之前的熔融聚氨酯流以从上方倾斜的角度插入到在导管中向下流动的熔融聚酰胺流中，使得少部分聚氨酯流动通过聚酰胺流动的最薄部分以有限的宽度径向突出，沿导管的内壁流下。对于该过程，可使用的喷丝头包括用于通过竖直导管连接到孔口的聚酰胺的引导管道，用于连接到从其倾斜延伸的注射管的聚氨酯的另一引导管道突出到所述管道中，紧邻所述孔口之前的开口并具有沿其整个突出长度在其下侧纵向延伸的狭缝。

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