Food Packaging Films requirements you know?
Food Packaging Films is used to wrap the surface of the 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.
Food Packaging Films Claim
There are many ways to prepare Food Packaging Films. One is to make antimicrobial masterbatch antibacterial masterbatch, antibacterial or antimicrobial masterbatch and resin monolayer extrusion or saliva prepared by, can also be used as a surface layer and other layers together to form an antibacterial composite membrane. And one by coating or depositing an antibacterial agent on a resin film.
For the antimicrobial film prepared from the antimicrobial masterbatch, since the film itself is thin in thickness, it is required that the particle size of the antibacterial particles is small and is distributed by a narrow particle size or an organic antibacterial agent capable of being dissolved in the resin. The effect of the addition of antibacterial or antimicrobial masterbatch on the mechanical properties of the film is not very obvious, and the printing performance of the film is not adversely affected. But some of the film has a certain impact on the barrier properties, so the choice of antibacterial agents and antimicrobial masterbatch should pay attention to antibacterial agents and antimicrobial masterbatch to join the film on the performance of the situation, select the appropriate antibacterial agent to ensure the performance of packaging Meet the requirements. General use of packaging materials are LDPE, LLDPE, EVA, cellulose film, edible film and so on.
For the method of coating or depositing the antimicrobial agent on the film, the barrier properties of the different plastics themselves are large and can affect the quality of the final product if the substrate is damaged during coating and coating. The surface properties of the surface of the plastic film, the performance of polarity, surface roughness, surface oxygen, nitrogen atoms will affect the percentage of film and antibacterial adhesive strength, thus affecting the antibacterial properties. In addition, the surface of the film substrate should be pretreated before coating or depositing the antimicrobial agent onto the film, improving the surface land energy and improving the binding force. For the coating or evaporation of the packaging film substrate generally PET, PA, PVC, BOPP, LDPE and so on.
Food Packaging Films In addition to the mechanical properties required to meet the packaging itself, printing performance, display performance and other packaging materials must have the performance, the world for food packaging materials, health performance has a high demand. China's national standard GB-9687 provides for the health requirements of food packaging materials, requiring the material color normal, no smell, no smell, no foreign body, and in the evaporation residue, potassium permanganate consumption, heavy metal content, decolorization experiments Aspects meet the corresponding requirements. The United States FDA on food packaging materials composition, additive specifications, conditions of use, dissolution requirements, food packaging materials, chronic toxicity test requirements, sub-chronic toxicity test requirements have also made specific provisions.
Composite antibacterial agents for food packaging, organic antimicrobial agents in the Japanese market Antiride and pyridine antibacterial compound compound compound antimicrobial triazine antibacterial agent, its antibacterial effect increased by 3- 4 times. Domestic Haier Kehua Engineering Plastics National Engineering Research Center developed organic antimicrobial agents and inorganic antibacterial agent compound antibacterial agent, to overcome the KFHS series of antibacterial function of a single problem. In addition, nano-TiO2 can be added to the inorganic silver antibacterial agent in the Food Packaging Films to solve the problem of slow antibacterial effect of silver antibacterial agent.