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About film antibacterial test (film adhesion method)

1. Introduction

In today's world where "safe, secure, and clean spaces" are required, the market for antibacterial processed products is expanding internationally as a material that helps improve people's lives. It is an antibacterial processed product that has become established in our daily lives, but depending on how it is used, it may not be fully effective. Antibacterial processed products and antibacterial agents must be understood and used correctly.

 

2. What is "antibacterial"?

In the antibacterial processed product guidelines, "antibacterial in antibacterial processed products" is defined as "suppressing the growth of bacteria on the surface of the product". By this definition, the range of antibacterial action is limited to the surface of the product, and products that are processed to prevent the growth of bacteria on the surface are called antibacterial processed products. Also, since the target is limited to bacteria, fungi such as mold are not included. In the term of microbial control engineering, "antibacterial" means "antimicrobial", and any influence on the growth of microorganisms is expressed as "antibacterial". Antibacterial includes not only sterilization and bactericidal effects, but also bacteriostatic and bacteriostatic effects. In addition, it does not mean that "if it is an antibacterial processed product, bacteria will not increase even if it is not washed", and if there is dirt on the surface, it will not be effective enough, so it is necessary to keep it clean.  

Antibacterial processed products are required in the industry as potential needs that are the medical welfare-related, food processing-related, food stores, etc., and the target equipment to use antibacterial product includes keyboards and mice used for the personal computers used in medical equipment and offices. Many items used in social life, such as electrical operation panels and food stores, are also recommended to be used. The following five items are required for antibacterial processed products. (1) The antibacterial effect lasts for a certain period of time (2) It is harmless to the human body (3) It has sanitary properties (4) It has heat resistance and corrosion resistance (depending on the conditions of use and the ingredients used together) (5) It is inexpensive

 

 

3. Evaluation of antibacterial effect (antibacterial property test)

According to the Japanese Industrial Standards (JIS), if the bacterial growth rate is 1/100 or less (antibacterial activity value "2" or more) compared to the surface of an unprocessed product, the product has an antibacterial effect. It is stipulated. Staphylococcus aureus and Escherichia coli are defined as the bacteria to be used. Antibacterial tests include the film adhesion method and shake method, which numerically evaluate changes in the number of bacteria, the diffusion method, which visually evaluates the suppression of bacterial growth, and the minimum inhibitory concentration (MIC). (1) Film adhesion method General antibacterial processed products are tested based on the "film adhesion method" stipulated in "JIS Z 2801: 2010 Antibacterial processed products-Antibacterial test method / antibacterial effect".

"Dispoli" uses the film adhesion method.

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