Antibacterial Activity of Basic Dyes on the Dyed Acrylic Fibers

摘要

Antimicrobial activity against 2 species bacteria of six basic dyes and Benzalkonium chloride as a retarding agent in the dyed acylic biders was investigated by mean of JIS test method (JIS L 1902). To eamine the effect of the dye concentration in the dyed fibers on artibacgterial activity, it was represented by SOR that is the ratio of dye concentration in the dyed fibers to its relative saturation value. Results of JIS test method demonstrated that antibacterial activity of the dyed fibers was obviously revealed and related to minimum bactericidal concentration (MBC) of the respective dyes and Benzalkoniun chloride depending on the chemical structure of them. Antibacterial activities in the dyed fibers with the basic dyes of triphenyl-methane, azine, azo and thiazine were compared,which decreased in that order. And antibacterial activity was apt to increase with SOR. Bactericidal activity against Staphylococcus aureus IFO12732 was shown in all dyes except thiazine, wheres that against Escherichia coli K12 W3110 was low activity. Benzalkonium chloride was eqully effective against both bacteria and improved antibacterial activity in the dyed fibers with lower SOR level of Malachite Green