1.What is the core of achieving an antibacterial coating?
Antibacterial agents are uniformly dispersed in topcoats or specific functional coatings. Common antibacterial agents include:
Silver ion antibacterial agents: The most mainstream technology. Silver ions can disrupt bacterial cell membranes and inhibit enzyme activity, thus effectively killing or inhibiting bacteria and mold. They are characterized by broad-spectrum activity, long-lasting effect, and high safety (stable presence in the coating).
Photocatalytic antibacterial agents (such as nano-titanium dioxide): These produce highly oxidizing substances under light, which can decompose bacteria, viruses, and organic pollutants, possessing both antibacterial and self-cleaning functions.
Organic antibacterial agents (such as quaternary ammonium salts): They have a rapid onset of action, but may have issues with heat resistance and longevity compared to inorganic antibacterial agents.
2.What is the working principle of antibacterial coatings?
Contact sterilization/bacteriostasis: When the antibacterial agent on the coating surface comes into contact with microorganisms, it disrupts their physiological structure, causing them to die or lose their ability to reproduce.
Long-lasting effect: High-quality antibacterial coatings, through slow-release technology, can continuously provide antibacterial protection throughout the product's lifespan.
3.What are its main application areas?
Medical and Public Health Facilities:
Hospitals: Partitions, ceilings, and equipment casings in operating rooms, wards, laboratories, and pharmacies.
Biological Laboratories, PCR Laboratories: Areas requiring extremely high sterility.
Public Toilets, Wastewater Treatment Plants: Inhibiting mold and odors.
Food Processing and Catering Industry:
Food Factories: Interior walls and roofs of slaughterhouses, brewing plants, and dairy processing workshops, meeting HACCP and other food safety management system requirements.
Commercial Kitchens, Cold Storage: Inhibiting mold growth and facilitating cleaning.
Special Residential and Office Environments:
Schools, Kindergartens, Nursing Homes: Densely populated areas prone to cross-infection.
Buildings in High Humidity Areas: Such as basements and bathrooms, preventing mold growth.
4.What are key performance indicators and certifications?
Antibacterial Effectiveness: The product will pass testing by authoritative laboratories. Common standards include:
ISO 22196 / JIS Z 2801: Determination of antibacterial activity on plastics and non-porous surfaces.
GB/T 21866: Determination of antibacterial properties of antibacterial coatings.
The test report will clearly specify the antibacterial rate (typically >99%) against which bacteria (e.g., Staphylococcus aureus, Escherichia coli, molds).
Safety and Durability:
Safety: The antibacterial agent is firmly fixed in the coating and will not easily leach out, posing a threat to human health and the environment.
Durability: The antibacterial effect needs to be combined with the coating's own weather resistance, corrosion resistance, and chemical resistance to ensure continued effectiveness after cleaning, friction, and long-term use.
Product Labeling and Selection:
Reputable manufacturers will clearly label the product as "Antibacterial Color Coated Steel Sheet" or "Antimicrobial Coating" and provide detailed technical data sheets and third-party testing reports.
When making a selection, you should focus on its antibacterial spectrum, antibacterial rate, durability test data, and whether it meets relevant industry standards.
5.What are the functions of antibacterial color-coated rolls?
By adding long-lasting antibacterial agents such as silver ions to traditional high-performance coatings, it provides a solution for controlling microbial contamination at the building envelope level for places with stringent hygiene requirements, such as hospitals, food factories, and schools.