Antibacterial test of water-absorbent resin
This is the testing method conducted with reference to the "Testing Method for Antibacterial Performance of Water-Absorbent Resins" by the Japan Hygiene Materials Industry Association and the Water-Absorbent Resin Industry Association.
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Applications/Examples of results
**Test Method** Place the control sample (cotton fabric) and the test sample (water-absorbent resin) in artificial urine and allow them to absorb for 30 minutes, measuring the weight before and after absorption to determine the pre-calculated water absorption amount. Take 0.20±0.02 g of both the test sample and the control sample, and inoculate with a quantity of test bacterial solution (prepared in artificial urine, Staphylococcus aureus and Escherichia coli) that corresponds to the pre-calculated water absorption amount. After inoculation, incubate at 36±2°C for 18 hours. After 18 hours of incubation, wash the test sample and the control sample with SCDLP liquid medium immediately after inoculation and after 18 hours of incubation, respectively, to measure the viable bacterial count. Compare the viable bacterial counts of the test sample and the control sample after 18 hours of incubation to evaluate antibacterial properties.
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At our center, we not only conduct tests as specified by JIS and other regulations, but we also propose testing methods that suit the purpose of the tests. We capture the entire problem for problem-solving and provide practical advice.
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