【公式】株式会社トーカイ｜最先端の薄膜成膜技術。薄膜の蒸着・成膜・スパッタリングなど。光学技術が脚光を浴びる今日、その情熱をいっそう強く持って事業展開をしております。

AR coating with antibacterial function

This is an antibacterial AR coaing product that has multi-AR coating functions and antibacterial properties to glass substrates and resin substrates, they can be used for medical devices, touch panels for example. Antibacterial properties can suppress the growth of Staphylococcus aureus and Escherichia coli.
*Even if AF coat is applied to the final layer, the antibacterial performance will be equivalent to antibacterial AR coat.

JIS　Z2801　Antibacterial test details

JIS Z 2801 Antibacterial processed products – Antibacterial test method
Test institution: Kaken Test Center General Incorporated Foundation

Approval number: No.22-0066
Expiration date: July 21, 2024
No.TB-22-003112(1)
Publication date: July 15, 2022

Exam outline

Test bacteria: 2 types of bacteria: Staphylococcus aureus and Escherichia coli　　　　　　　　　　　　
Bacterial solution: Suspend test bacteria in 1/500 ordinary bouillon medium (105/mL)　　　　　　　　　　　　　　
Test piece: 5 cm x 5 cm specimen (antibacterial treated and untreated)
*Tests were conducted on D263Teco white plate glass to confirm the antibacterial effect.
– Inoculation of bacterial solution: After inoculating the bacterial solution onto the surface of the test piece, cover it with a polyethylene film and adhere tightly.
Culture of test piece: Incubate the test piece inoculated with the bacterial solution for 24 hours at 35 ℃ and relative humidity of 90% or higher.
Measurement of viable bacteria count: Test piece immediately after inoculation of bacterial solution (unprocessed only) and after 24 hours of culture measure the number of viable bacteria of 3 (n=3)
Calculation of antibacterial activity value (R): R = U – A
U: Logarithms of the number of viable bacteria on the unprocessed test piece after 24 hours
A: Logarithms of the number of viable bacteria on the antibacterial treated test piece after 24 hours

Test bacteria: NBRC12732 (Staphylococcus aureus)
　　　　　　 NBRC3972 (E. coli)

Pre-test treatment method: Water resistant treatment [Category 0]
(Sustainability Standards of Antibacterial Product Technology Council)

Water-resistant treatment [Category 1] (Antibacterial
Product Technology Council Sustainability Standards)

Antibacterial AR coating product reliability test

Reliability test results (No peeling off or significant changes in spectral characteristics)

Test items	Evaluation test destination	Test method	Test results
Test items	Evaluation test destination	Test method	Normal AR coat	Antibacterial AR coat	Antibacterial AR coat + AF coat
Antibacterial activity value	Kaken Test Center	・Staphylococcus aureusNBRC12732	×	〇	〇
Antibacterial activity value	Kaken Test Center	・Escherichia Coli NBRC3972	×	〇	〇
High temperature and humidity test	Tokai	There shall be no peeling of the film or significant change in spectral characteristics after 85℃85%RH/1000hr.	〇	〇	〇
High temperature test	Tokai	200℃/24h No peeling of film or significant change in spectral characteristics.	〇	〇	〇
Rubbing test	Tokai	500g/100 times No peeling of the film or change in spectral characteristics after the test.	〇	〇	〇
Boiling test	Tokai	Boiling for 1 hour. There should be no peeling of the film or change in spectral characteristics after the test.	〇	〇	〇
Salt water test	Tokai	There shall be no peeling of the film or significant change in spectral characteristics after immersion in 4.5% salt water for 24 hours.	△	△	△

Spectral Data

Usage

Touch panel/Display

Case Study

Japan

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