"MG Net" antibacterial test report

Silver ions are well known for their antibacterial properties, and silver sulfate and silver sulfadiazine have been used to prevent bacterial infection in burn treatment.

The "MG Net" developed by our company is a material made by coating the surface of nylon with pure silver (99.9% purity) and forming a coarse mesh in a honeycomb shape. The Japan Chemical Fiber Inspection Association and Biological Testing Center conducted tests to see how well MG Net inhibits bacterial activity.

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１． Test item：

A sample (MG net) made by twisting nylon fibers with electroless plating of silver onto the surface into threads and forming a coarse honeycomb net.

２．Testing organization: Kaken Test Center, a general incorporated foundation

３． Test content: Antibacterial properties (standardized test method)

４． Test Overview：

Based on the unified test method, MG net and standard white nylon cloth were soaked in culture solution, and the same amount of various live bacteria were inoculated therein, and the number of live bacteria was examined after 18 hours. Since the culture solution was diluted 20 times when counting the number of live bacteria, a live bacteria count of 0 will be displayed as 20 or less. In addition, the live bacteria count was also examined when the same test was performed after washing 10 times and 50 times using the high temperature accelerated washing method (JIS L 0217, No. 103, using JAFET standard detergent).

５．Test Bacteria Species：

Staphylococcus aureus ATCC 6538P, Klebsiella pneumoniae ATCC 4352, MRSAMethicillin Resistant Staphylococcus aureus ID 1677, Escherichia coli O157:H7 ATCC 43888, Pseudomonas aeruginosa NBRC 3080

６． Bacteria culture medium：

Luria broth (10g tryptone, 5g yeast extract, 0.5g salt dissolved in 1 liter of water)

７． Test results: see table below

８． Test Report：

According to the SEK standard (New Functionality Evaluation Council standard for Textile Products), a bacteriostatic activity value of 2.2 or above is considered to be good antibacterial properties. The bacteriostatic activity value of this fabric is at the highest level. It was also found that the antibacterial properties hardly decrease even after 50 washes.

Pure silver reacts with chlorine (Cl) and sulfur (S) and turns into silver chloride and silver sulfide. It deteriorates in places with salt, exhaust gas, or a sulfur smell. If you put it in tap water, it will react with chlorine, so we take that into consideration when setting a usage period.

Medical Aid Co., Ltd.