Antibacterial AgentsAntibacterial Agent NOVARON® for Resin
NOVARON® for Resin is a glass-based antibacterial agent containing zinc as an antibacterial component. It has excellent discoloration resistance and is highly applicable to transparent resins. It has also been confirmed to be highly safe.
Features
- Suitable for resin due to its high heat resistance.
- Wide range of products suitable for various applications.
- Resistant to discoloration.
- Approved by the Society of International Sustaining Growth for Antimicrobial Articles (SIAA) as an antibacterial agent.
Specification
Grade and characteristics
| Grade | Characteristic | Average particle size | Specific gravity | Refractive index |
| VZ100 | Standard (Zinc glass) | 5 μm | 3.6 | – |
|---|---|---|---|---|
| AGZ330 | Standard (Silver) | 1 μm | 4.2 | – |
| VZN300 | For ABS resin | 2 μm | 4.3 | – |
| VZ600 | For transparent ABS | 9 μm | 3.1 | 1.54 |
| VZ900 | For transparent GPPS, PC | 9 μm | 3.4 | 1.58 |
Mechanism
Metal ions are thought to affect intracellular enzymes and inhibit metabolic functions of bacteria.
Antibacterial effect
The minimum concentration (unit: μg/mL) of the antibacterial agent required to inhibit bacterial division and growth is called the minimum inhibitory concentration (MIC), and the smaller the value, the higher the antibacterial effect. The table below shows the MIC measurement results for various microorganisms by the agar plate dilution method.
| Bacteria species | Characteristic | MIC of VZ100 |
| Escherichia coli | Food and drinking water pollution indicator bacteria | 800 |
|---|---|---|
| Staphylococcus aureus | Causes of suppuration, sepsis and food poisoning | 200 |
Safety of NOVARON®
It has been confirmed to be highly safe by various safety tests.
VZ100 safety test result
| Item | Test condition | Result |
| Acute oral toxicity | OECD423 | > 5,000 mg/kg |
|---|---|---|
| Mutagenicity | OECD471 | Negative |
| Primary skin irritation | OECD404 | No irritation |
| Skin sensitization | OECD406 | Negative |
Application example
| General goods | Cutting board, Corner sink strainer, Cups, Food container, Sponge, Hanger, Remote controller cover |
|---|---|
| Interior | Wallpaper, Flooring, Wash basin, Kitchen counter, Furniture, Sealant, Tile |
| Electronic appliance | Refrigerator, Washing machine, TV, Dishwasher, Humidifier, Mobile phone, Games console |
| Others | Sporting goods, Doll, Toy, Clay, Puzzle, Hand dryer, Escalator handrail belt |
Product performance
Example of application in polypropylene resin
The antibacterial activity1 and weatherability2 of the polypropylene resin which contains 0.3% of antibacterial agent were evaluated after water resistance test3.
| E. coli | S. aureus | Weatherability | |||||
| Initial | After water resistance test | Initial | After water resistance test | ΔE | |||
| Initial No. of bacteria | 4.0×105 | 2.9×105 | － | ||||
|---|---|---|---|---|---|---|---|
| Blank | 1.3×107 | 1.2×107 | 1.1×105 | 2.1×105 | 2.4 | ||
| NOVARON® VZ100 | ＜10 | 5.5×103 | ＜10 | 3.0×102 | 1.7 | ||
| NOVARON® VAG500 | ＜10 | ＜10 | ＜10 | ＜10 | 2.0 | ||
| Silver Zeolite | 3.8×102 | 1.8×105 | 8.1×102 | 8.8×104 | 10.2 | ||
1 Based on JIS Z 2801.
2 ΔE after 8 hours of sunshine carbon arc irradiation.
3 50±5℃､16 hours (SIAA, Water resistance test class 2)
Example of application in transparent ABS resin
The antibacterial activity1 and transparency2 of the transparent ABS resin which contains 0.5% of antibacterial agent were evaluated after water resistance test3 and weatherability test4.
| E. coli | S. aureus | Transmittance (%) | |||||
| Initial | After water resistance test | After weatherability test | Initial | After water resistance test | After weatherability test | ||
| Initial | 2.9×105 | 3.7×105 | － | ||||
|---|---|---|---|---|---|---|---|
| Blank | 1.4×107 | 1.1×107 | 1.4×107 | 2.3×105 | 2.0×105 | 1.6×105 | 90 |
| NOVARON® VZ600 | 7.4×102 | 2.2×102 | 3.5×103 | 1.2×102 | 5.3×102 | 3.1×102 | 89 |
| Silver Zeolite | 4.8×103 | 5.1×106 | 9.2×103 | 4.9×102 | 1.1×105 | 2.4×103 | 35 |
1 Based on JIS Z 2801.
2 The larger the value, the greater the transparency.
3 50±5℃､16 hours（SIAA, Water resistance test class 2)
4 ΔE after 8 hours of sunshine carbon arc irradiation.