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    • 40. 发明授权
    • Waterproof cable and method of manufacture thereof
    • 防水电缆及其制造方法
    • US5888323A
    • 1999-03-30
    • US909235
    • 1997-08-11
    • Jun YasukuniTakashi Itoh
    • Jun YasukuniTakashi Itoh
    • H01B7/282H01B7/288H01B13/32B65H81/06
    • H01B7/288H01B13/321H01B13/322
    • A waterproof cable having a plurality of conductive strands which are twisted together to form a wire core which is surrounded by an insulation layer. A water-absorptive swellable powder is applied to the individual strands prior to twisting and thereby is introduced into the interstices between adjacent strands. If water attempts to enter the spaces between the strands, it is absorbed by the powder which swells to occupy all the space and thereby seals the cable against further water penetration. The cable is produced by application (e.g. by spraying) of a solution of the powder in a solvent to the individual strands. Thereafter, the solvent is evaporated, leaving the powder adhered to the strand surfaces. In a preferred form of the Invention, regions containing the powder are longitudinally spaced apart from adjacent regions having no powder therein. In a more preferred form of the Invention, the powder is removed from the outer surface of the wire core prior to coating with insulation. This facilitates stripping of the insulation layer when and where needed.
    • 一种防水电缆,其具有多个导体线束,所述导电线束被扭绞在一起以形成被绝缘层包围的线芯。 在扭曲之前将吸水性可溶胀粉末施加到单个股线,从而被引入相邻股线之间的间隙。 如果水试图进入股线之间的空间,它被溶胀的粉末吸收,占据所有空间,从而密封电缆以防止进一步的水渗透。 电缆是通过将粉末溶于溶剂中的溶液施加(例如通过喷雾)而制成的。 此后,蒸发溶剂,留下粉末粘附到股线表面。 在本发明的优选形式中,含有粉末的区域与其中没有粉末的相邻区域纵向间隔开。 在本发明的更优选形式中,在用绝缘体涂覆之前,将粉末从线芯的外表面去除。 这有助于在何时和在需要时剥离绝缘层。