Antibacterial agent for epoxy plastic powder. Long-lasting antibacterial effect. Antibacterial rate: 99.9%
Epoxy plastic powder antibacterial agent is a type of additive specially designed for epoxy resin-based powder coatings. By disrupting the cell membranes or metabolic systems of microorganisms, it inhibits the reproduction of bacteria (such as Escherichia coli, Staphylococcus aureus) and molds (such as Aspergillus niger, Aspergillus flavus), thereby endowing the coating with long-lasting antibacterial properties. The following introduces it from three aspects: core characteristics, technical advantages, and application scenarios:
1. Core Characteristics
Broad-spectrum antibacteriality
It effectively inhibits the growth of Gram-positive bacteria (such as Staphylococcus aureus), Gram-negative bacteria (such as Escherichia coli), and molds (such as Aspergillus niger, Aspergillus flavus), with an antibacterial rate of over 99%. Some products achieve contact killing effect through nano silver ions or zinc oxide components, directly destroying the structure of microorganisms.
Heat resistance
It is compatible with the processing temperature of epoxy plastic powder (usually 180-250℃), ensuring that the antibacterial agent does not decompose during melting extrusion and injection molding. For example, some inorganic antibacterial agents show no significant change in antibacterial activity after being calcined at 1000℃, and their color remains stable.
Persistence
The antibacterial components are fixed by nano carriers (such as zirconium phosphate), preventing migration or failure, and the antibacterial effect can last for more than 2 years. Some products achieve long-term protection through slow-release technology, reducing the environment for microbial growth.
Environmental safety
It complies with international safety standards such as FDA and LFGB, ensuring that the antibacterial agent does not migrate into food. Natural antibacterial agents (such as chitosan) are biodegradable and suitable for scenarios with high environmental requirements, such as children's toys.
Transparent retention
The particle size of nano silver ion antibacterial agents is small (<2.4μm), and their addition does not affect the light transmittance of epoxy films, suitable for packaging materials requiring high transparency.
2. Technical Advantages
Inorganic antibacterial agents
Silver ion system: Using zeolite and phosphate as carriers, it has broad-spectrum antibacterial properties and high heat resistance (>300℃), but the silver loading system needs to solve the color change problem.
Nano photocatalytic type: Such as nano TiO₂, which decomposes organic substances and kills microorganisms under ultraviolet irradiation, has long-term effectiveness and no consumption.
Organic antibacterial agents
Quaternary ammonium salts, diamine compounds: They take effect quickly and have significant anti-mold effects, but have poor heat resistance (usually <200℃), and need to be improved in dispersion through granulation.
Synergistic technology: Combining organic and inorganic components to solve problems such as fast release and poor durability, improving antibacterial stability.
Natural antibacterial agents
Chitosan: Produced by deacetylation of chitin, it has poor thermal stability but can be biodegraded, suitable for scenarios with low processing temperatures.
III. Application Scenarios Food packaging
Prevent the growth of microorganisms in packaging and extend the shelf life of foods such as meat and vegetables. For example, antibacterial epoxy films can be used as cling films and food containers.
Medical equipment
Used in infusion bags, catheters, etc., to prevent bacteria from forming biofilms on the material surface and reduce the risk of infection. Some products are combined through sterilization processes to extend the validity period of disposable items.
Public facilities
High-frequency contact scenarios such as subway handrails and elevator buttons, reducing the risk of cross-infection. Antibacterial coatings can reduce the frequency of coating detachment or replacement caused by microbial corrosion.
Household items
Damp environments such as refrigerator inner linings and air conditioner shells, inhibiting bacterial reproduction and improving hygiene levels. Antibacterial cutting boards and trash cans can prevent the production of musty odors.
Industrial fields
Pipe inner walls, ship exteriors, etc., to prevent algae and bacteria from adhering, extending service life. Antibacterial powder coatings are used for metal surface painting to enhance anti-corrosion performance.
