Food packaging film is used to wrap on the surface of food, mainly used to isolate the decomposition of microbial bacteria and foreign pollutants into the prevention and extension of food deterioration of the polymer material.
1, photocatalytic inorganic antibacterial agent film
Antimicrobial mechanism: Photocatalytic antibacterial agent is mainly TiO2, in the light on the surface can produce a large number of hydroxyl groups ** and oxygen ** base, the two ** base has a strong chemical activity, can make a variety of micro-organisms Organic decomposition occurs, and thus has antibacterial properties.
Application of Photocatalytic Inorganic Antibacterial Agent Film. Since 1995, photocatalytic preparations were first available in Japan, food packaging.
2, natural and polymer antibacterial film
Other antimicrobial agents are also films of natural antimicrobial agents and polymeric antimicrobial agents. Their antimicrobial mechanism through the molecular chain of the charge and microbial effects, thereby inhibiting microbial reproduction, play an antibacterial effect. For food packaging mainly chitosan, sorbic acid, turmeric alcohol.
3, composite antibacterial film
The effect of the composite antimicrobial agent film is mainly in the following aspects: to extend the antibacterial cycle; low concentration can produce antibacterial properties; broaden the antibacterial spectrum, than any single antibacterial agent to inhibit more microbial.
4, inorganic antibacterial agent thin
Inorganic antimicrobial agent is the use of silver, copper, zinc, titanium and other metals and their ions, sterilization and antibacterial ability of the antibacterial agent. In the early 1980s, Japanese scientists began to add silver compounds directly to the resin, the first use of inorganic antibacterial agent made of antibacterial plastic film.
Antimicrobial mechanism: Since the inorganic antibacterial agent belongs to the dissolution contact type antibacterial agent, the antibacterial effect of the inorganic antibacterial agent film is passive. There are two explanations for the mechanism of antimicrobial action of metal ions.
One is the contact reaction mechanism. The inorganic ions in the inorganic antimicrobial agent are exposed to the microorganisms, causing the microbial protein structure to break down, causing the microorganism to die or to cause dysfunction.
One is the active oxygen mechanism. Inorganic antimicrobial agent surface of the micro-metal ions can absorb the energy in the environment to activate the surface of the packaging film in the air and water oxygen, resulting in hydroxyl and active oxygen ions, they have a strong redox capacity, Destruction of bacterial cell reproductive capacity, inhibition or kill bacteria, produce antibacterial effect.
5, organic antibacterial agent film
Antimicrobial mechanism: The main mechanism of organic antimicrobial agent is through the microbial cell membrane surface anion and gradually enter the cell, or with the cell surface of the mercapto group reaction, destruction of protein and cell membrane synthesis system, inhibit microbial reproduction.
Food Antibacterial Packaging is the most promising part of the food active packaging. The choice of antibacterial film packaging is the most beneficial, it can continue to release antibacterial agents to inhibit the growth of microorganisms to ensure food safety, extend the shelf life of food. Let us consumers enjoy a higher quality of life.