Title:
PHOSPHOR BRONZE ALLOY EXHIBITING REDUCTION IN GLOSS (LOW GLOSS, OR MATTE) BY ROUGHENING SURFACE HAVING ANTIBACTERIAL PROPERTY WITH DULL ROLL TO REDUCE GLOSS AND SIGNIFICANT AMPLIFICATION OF ANTIBACTERIAL PROPERTY, AND ARTICLE USING THE SAME
Document Type and Number:
Japanese Patent JP2021123787
Kind Code:
A
Abstract:
To diversify an application capable of utilizing a low gloss and an amplified high antibacterial property of phosphor bronze and to broaden article field to be proposed, by verifying a low gloss or matte, and at the same time, a remarkable amplification of an antibacterial property and by providing a method for reducing discoloration caused by contact with a human body and change over time, owing to a dull processing of phosphor bronze.SOLUTION: The original high antibacterial properties may be further amplified and expressed more remarkably by making the composition of the phosphor bronze alloy comprise 1.05 wt.% of tin and 0.09 wt.% of phosphorus, and a remainder made up by unavoidable impurities with copper. Initially, the dull roll processing was aimed for the purpose of preventing color change, but while changing the roughness of the dull roll and simultaneously measuring the antibacterial value, the roughness of the dull roll in which low gloss and high antibacterial properties were amplified at a certain roughness became clear. However, the rough-surfacing by 12 to 20S dull not only further amplifies the original high antibacterial properties, but also does not allow other rough-surfacing to follow in preventing color change due to contact with the human body. This highly antibacterial phosphor bronze plate leads to the expansion of fields that can be used, for example handrails, doorknobs, such as medical institutions, and in turn, it is available to obviate the spread of infectious diseases by covering parts that are directly touched by hand in places where an unspecified number of humans gather and separate.SELECTED DRAWING: None
Inventors:
HARADA MARIO
TANIGUCHI MORIYA
TANIGUCHI MORIYA
Application Number:
JP2020031011A
Publication Date:
August 30, 2021
Filing Date:
February 07, 2020
Export Citation:
Assignee:
HARADA METAL IND CO LTD
International Classes:
C22C9/02; A01N59/16; A01N59/20; A01N59/26; A01P3/00; B21B1/22; B21B3/00; B21B27/00
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