公开(公告)号：US20230084143A1

公开(公告)日：2023-03-16

申请号：US17990028

申请日：2022-11-18

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Akiko YAMAMOTO ,  Keiichiro OISHI ,  Shinji TANAKA

IPC: C23C22/05 ,  A01N37/20 ,  A61L2/235 ,  A61L2/238 ,  C22C9/04 ,  C22C9/10

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.

公开(公告)号：US20200157688A1

公开(公告)日：2020-05-21

申请号：US16627867

申请日：2018-05-30

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Akiko YAMAMOTO ,  Keiichiro OISHI ,  Shinji TANAKA

IPC: C23C22/05 ,  A61L2/238 ,  C22C9/04 ,  A01N37/20 ,  C22C9/10 ,  A61L2/235

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.

公开(公告)号：US20130129908A1

公开(公告)日：2013-05-23

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

IPC: A61L27/00

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.