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公开(公告)号：US09155816B2
公开(公告)日：2015-10-13
申请号：US13709519
申请日：2012-12-10
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Sachiko Hiromoto , Akiko Yamamoto , Norio Maruyama , Toshiji Mukai , Hidetoshi Somekawa
CPC classification number: A61L27/00 , A61L27/047 , A61L27/32 , A61L27/58 , C23C22/22
Abstract: A magnesium-based medical device which can adjust a degree of corrosion within a wide range of period such that the device can maintain a sufficient strength only during a desired period and disappears within a desired period thereafter and a manufacturing method thereof are provided. A magnesium-based medical device of the present invention is a magnesium-based medical device in which a base material is made of magnesium or a magnesium alloy, wherein a corrosion-resistant film is formed on a surface of the base material, and variation in surface hardness of the formed corrosion-resistant film in the in-plane direction is less than 21 in terms of a dispersion value of Vickers hardness.
Abstract translation: 一种可以在宽范围内调节腐蚀程度的镁基医疗装置，使得该装置只能在期望的时间段内保持足够的强度并在此后期望的时间内消失，并提供其制造方法。 本发明的镁系医疗装置是基材由镁或镁合金制成的镁基医疗装置，其中，在基材的表面上形成耐腐蚀性膜， 所形成的耐腐蚀膜在面内方向的表面硬度以维氏硬度的分散值计小于21。
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公开(公告)号：US12071693B2
公开(公告)日：2024-08-27
申请号：US17990028
申请日：2022-11-18
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Akiko Yamamoto , Keiichiro Oishi , Shinji Tanaka
Abstract: The present invention provides a surface treatment method that improves antimicrobial activity of copper or a copper alloy and enhances immediate effects of antimicrobial actions on the surface of the copper or the copper alloy. A surface treatment method for copper or a copper alloy according to the present invention comprises preparing a reducing agent solution containing a biological reducing substance, and treating the surface of the copper or the copper alloy with the reducing agent solution. The present invention also provides a surface treatment liquid for sterilizing copper or a copper alloy, in which the surface treatment liquid contains a biological reducing substance. The present invention also provides a sterilization method that comprises bringing copper or a copper alloy treated by the surface treatment method into contact with a surface of an object to sterilize the surface of the object.
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公开(公告)号：US11535939B2
公开(公告)日：2022-12-27
申请号：US16627867
申请日：2018-05-30
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Akiko Yamamoto , Keiichiro Oishi , Shinji Tanaka
Abstract: The present invention provides a surface treatment method that improves antimicrobial activity of copper or a copper alloy and enhances immediate effects of antimicrobial actions on the surface of the copper or the copper alloy. A surface treatment method for copper or a copper alloy according to the present invention comprises preparing a reducing agent solution containing a biological reducing substance, and treating the surface of the copper or the copper alloy with the reducing agent solution. The present invention also provides a surface treatment liquid for sterilizing copper or a copper alloy, in which the surface treatment liquid contains a biological reducing substance. The present invention also provides a sterilization method that comprises bringing copper or a copper alloy treated by the surface treatment method into contact with a surface of an object to sterilize the surface of the object.
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