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The main role of food packaging film and production requirements
- Mar 17, 2018 -

The food packaging film is used to wrap on the surface of foods, and the main function is to isolate the entry of microbial bacteria and foreign pollutants, and prevent and prolong the deterioration of foods. Under normal circumstances, food packaging films are made of high polymer materials. In order to ensure the use of results, there are strict requirements on the quality of food packaging films.


At present, different production methods can be used when producing such a food packaging film. For example, in order to improve its antibacterial performance, the antibacterial agent can be made into an antibacterial masterbatch, and can be prepared by extruding or flowing a antibacterial agent or an antibacterial masterbatch and a resin monolayer. Alternatively, the antimicrobial composite membrane may be formed by co-extruding as a surface layer and another layer. It can also be obtained by coating or vapor-depositing an antibacterial agent on a resin film.


In comparison, the food packaging film product produced by the first method has a relatively small thickness, so the particle size of the antibacterial particles is required to be small, and the relatively narrow particle size distribution or organic that can be dissolved in the resin is required. Antibacterial agents. In general, the addition of an antibacterial agent or an antibacterial masterbatch does not have a significant effect on the mechanical properties of the film and does not adversely affect the printability of the film.


However, the barrier properties of some food packaging film products may have a certain impact. Based on this consideration, when selecting the antibacterial agent and the antibacterial masterbatch, attention should be paid to the influence of the addition of the antibacterial agent and the antibacterial masterbatch on the performance of the film, and an appropriate antibacterial agent is selected to ensure that the performance of the package meets the requirements for use.


At present, in the production of food packaging film products, commonly used raw materials are LDPE, LLDPE, EVA, cellulose film, edible film and so on. Of course, food packaging film products not only meet the necessary performance of packaging materials such as mechanical properties, printing performance, display performance, etc., but also achieve high requirements in terms of sanitary performance.