Antibacterial masterbatch for PE plastic packaging bags, with an antibacterial rate of 99.9%
The antibacterial masterbatch for PE plastic packaging bags is a special masterbatch made by mixing antibacterial agents with polyethylene (PE) resin. Its core function is to protect the contents of the packaging (such as food and daily necessities) from bacterial and mold contamination by inhibiting or killing microorganisms, while prolonging the service life of the packaging bag itself. Here is a detailed introduction:
1. Antibacterial Principle and Mechanism of Action
Destroy cell structure
The antibacterial agents (such as silver ions, zinc ions, nano-zinc oxide, etc.) penetrate the cell membrane of microorganisms and destroy their internal structure, causing cell death. For example, silver ions can combine with enzymes or proteins on the surface of bacteria to hinder their metabolic processes.
Inhibit metabolic activity
The antibacterial agents interfere with key metabolic processes of microorganisms such as DNA replication and protein synthesis, inhibiting their reproduction. For example, polyguanidine salt organic antibacterial agents can quickly kill fungi and viruses, with a better killing speed than inorganic antibacterial agents.
Long-lasting persistence
The antibacterial agents are closely combined with the PE resin and achieve long-lasting antibacterial effect through slow release, avoiding the loss of active ingredients due to frequent contact with water or friction.
2. Core Characteristics and Advantages
High-efficiency antibacterial performance
The antibacterial rate can reach over 99.9%, with strong inhibitory effect on common pathogenic bacteria such as Escherichia coli, Staphylococcus aureus, and Candida albicans.
For example, PE packaging film with 4% antibacterial masterbatch has an antibacterial rate of ≥99.99% against Escherichia coli, and the preservation period is extended by 3-5 days.
Safe and environmentally friendly
The antibacterial agents used are non-toxic and non-irritating (such as nano-zinc oxide, polyguanidine salt), in line with food contact material safety standards, and harmless to humans and the environment.
Strong chemical stability, resistant to high temperatures (can withstand 330℃), and no harmful substances are produced during processing.
Compatible with processing
It has good compatibility with PE resin and can be directly processed through blow-molding, injection molding, etc., without the need for additional equipment adjustments.
Maintains the original physical properties of PE packaging bags (such as toughness, transparency), and does not affect subsequent processes such as printing and sealing. Cost-effectiveness
Compared with other antibacterial technologies (such as coatings and surface treatments), antibacterial masterbatches have lower costs and a smaller dosage (usually 5% by weight), making them suitable for large-scale production.
III. Typical Application Scenarios
Food Packaging
Food Wraps/Bags: Inhibit the growth of microorganisms on the surfaces of foods such as meat, vegetables, and fruits, extend the shelf life, and reduce the generation of odors.
Food Containers: Used for the production of disposable lunch boxes, beverage cups, etc., to prevent bacterial contamination and ensure food safety.
Medical Field
Medical Packaging: Used for the packaging of medical consumables such as surgical instruments, dressings, infusion sets, etc., to reduce the risk of cross-infection.
Medical Films: Used to make antibacterial dressing substrates, inhibit wound infection, and promote healing.
Daily Use Packaging
Garbage Bags: Inhibit the generation of odors and bacteria on garbage, maintain environmental hygiene.
Tablecloths/Plates: Prevent the spread of bacteria on the tabletop, suitable for dining and office scenarios.
Special Environmental Applications
Agricultural Films: Reduce the damage of microorganisms in the soil to crops, increase yield.
Electronic Product Packaging: Prevent the growth of mold on mobile phones, tablets, etc. during storage and transportation due to moisture.
