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The oligodynamic effect in layman's terms actually means the antibacterial function
that some metal ions have. The first microbiological application was reported by Carl
von Nageil in Switzerland in 1893, indicating that it was successful in getting rid of algae
from water tanks. However, even in ancient times, people were aware of the effect from
their own experience; water kept its freshness much longer if silverware was immersed
in it. It was said that when the kings of yore went on a military expedition they always
immersed silverware in the water to prevent it from becoming contaminated. In addition
to silver ion some other metal ions also have the following effect ( in order of antibacterial
intensity). Hg>Ag>Cu>Zn>Fe>Pb>Bi Silver ion is thought to be the most useful not only because of the excellent antibacterial effect even if added to water in small amounts, but also because it dose not have an adverse effect on the human body. Sumitomo Osaka Cement Co., Ltd.have studied the properties of silver ion over a number of years and finally developed the AM15 antibacterial additive to be mixed in glaze of ceramic sanitary ware. We are proud of the so called "Antibacterial Toilet" which has been very successfully marketed in Japan to the extent that it now accounts for major share of the Japanese sanitary ware market. |
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Features |
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AM15 (ceramic powder) should be mixed in the ratio of 1~3wt% of glaze. The merits of AM15 are •Antibacterial effect of silver ion Contained in AM15 which is harmless. •When sintered in glaze at high temperatures remains unaffected as the eoxidization andevaporation reaction of silver ion is controlled. •Bacteria multi plus slowly on the surface of the glaze. •The antibacterial effect lasts semi-permanently under normal conditions. |
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Keeping clean effects on glaze with AM15 |
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1) Stall type toilet (Photo 1) Tests were conducted in a public lavatory for two months period. One stall type toilet was "treated" with AM15 the other not. The toilets were not cleaned around the traps during the period resulting in discoloration and build up of urine stone on the "non treated" type and little discoloration or urine stone on the AM15 type. |
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2) Wash basins (Photo 2 and 3) A test conducted on a wash basin in a private house indicated that if the wash basin was not cleaned for a month brown staining would appear on the untreated surface but little staining on the treated surface.  |
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Examination of Antibacterial activity |
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The "Film Adherence Method" which is the Japanese self- imposed standard lab test
method for antibacterial products was used to measure the antibacterial activity of glaze
treated with AM15. The resul was shown in Table 1. Table 1: Antibacterial Activity of Glaze Mixed with AM15
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Results of safety tests conducted on AM15 |
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Sumitomo Osaka Cement Co., Ltd. NANO MATERIALS BUSINESS GROUP SALES TEAM 6-28, Rokubancho, Chiyoda-ku, Tokyo 102-8465, Japan Phone +81-3-5211-4799 Fax +81-3-3221-5692 e-mail: materials_sales@socnb.com URL: www://socnb.com |
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SOC AMERICA INC. 400 Kelby Street 16th Floor Parker Plaza Fort Lee, NJ 07024 TEL: +1-201-461-0100 FAX: +1-201-461-7001 e-mail : materials_sales@socnb.com |