What are the classifications of food packaging films?
The commonly used food packaging films mainly include: PVA coating bureau barrier film, biaxially oriented polypropylene film (BOPP), biaxially stretched polyester film (BOPET), nylon film (PA), cast polypropylene film (CPP). , aluminized film, etc. These films have excellent performance, good transparency, high tensile strength, certain gas barrier properties and low production cost, and are widely used.
|Edible packaging film refers to natural macromolecular substances such as edible materials, mainly lipids, proteins and polysaccharides, adding edible plasticizers, cross-linking agents, etc., through physical action blending, through different processing techniques. And the film formed. According to the characteristics of the main raw materials used, edible films can be divided into four categories: sugar edible film, protein edible film, lipid edible film, and composite edible film. For edible functional films, they have been widely used in daily life, such as the sticky rice paper used in the candy packaging and the corn baking packaging cup for packaging ice cream, which are typical edible packaging. The edible film is biodegradable without any contamination compared to synthetic packaging materials. With the increasing awareness of environmental protection, edible film has rapidly become a research hotspot in the field of food packaging, and has achieved certain results.|
Antibacterial food packaging films are a class of functional films that have the ability to inhibit or kill surface bacteria. According to the form of antibacterial, it can be divided into two types: direct antibacterial and indirect antibacterial. Direct antibacterial uses antibacterial ingredients to directly contact the food to achieve antibacterial; while indirect antibacterial, mainly to add some substances in the carrier that can adjust the microenvironment in the package, or use the selective permeability of the packaging material to control the microbial Growing, such as a modified atmosphere packaging film.