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    • 8. 发明申请
    • METHOD OF PRODUCING NEEDLE CANNULA WITH REDUCED END PORTION BY ELECTROCHEMICAL ETCHING
    • 通过电化学蚀刻生产末端部分减少的针套管的方法
    • WO2017182280A1
    • 2017-10-26
    • PCT/EP2017/058197
    • 2017-04-06
    • NOVO NORDISK A/S
    • TROSBORG, JacquelineUGGERHØJ, Jens, Christian
    • A61M5/32A61B17/34B21G1/00
    • A needle cannula (100) and a method for producing a needle cannula comprising providing a needle cannula tube (10) with an end portion (30). The end portion (30) comprises an outer surface, and a given type of steel comprising carbon (C) in 0.07 to 0.15 % by mass, silicon (Si) in 0.50 to 1.00 % by mass, manganese (Mn) in 5.0 to 7.5 % by mass, phosphorus (P) in 0 to 0.030 % by mass, sulfur (S) in less than or equal to 0.015 % by mass, chromium (Cr) in 17.5 to 19.5 % by mass, nickel (Ni) in 6.5 to 8.5 % by mass, and nitrogen (N) in 0.20 to 0.30 % by mass. The method further comprises establishing an electrochemical reaction to remove material from the outer surface of the end portion (30), and thereby providing a needle cannula (100) with a tapered end portion.
    • 一种针管(100)和一种用于制造针管的方法,包括提供具有端部(30)的针管套管(10)。 所述端部(30)包括外表面,并且给定类型的钢包含0.07-0.15质量%的碳(C),0.50-1.00质量%的硅(Si),5.0-7.5质量%的锰(Mn) 磷(P)为0〜0.030质量%,硫(S)为0.015质量%以下,铬(Cr)为17.5〜19.5质量%,镍(Ni)为6.5〜 8.5质量%,氮(N)为0.20〜0.30质量%。 该方法还包括建立电化学反应以从端部(30)的外表面移除材料,并由此提供具有渐缩端部的针套管(100)。