The classification and application of food packaging films encompass edible films, artificially synthesized high molecular weight polymer films, and biodegradable films. These materials find widespread applications across various fields, especially in the realm of food packaging.
1 Edible Films
Edible preservation films are a current focal point in the field of food packaging. Made from natural edible film-forming materials such as proteins, lipids, polysaccharides, and composite films, including chitosan, these films aim to enhance food safety and environmental friendliness. While large-scale commercialization is yet to be achieved, ongoing research in various application scenarios persists.
2 Artificially Synthesized High Molecular Weight Polymer Films
Artificially synthesized high molecular weight polymer films play a crucial role in food packaging, with polymers like polyamide, polyethylene, and polyvinyl alcohol garnering significant attention. In this field, the application of surface activation technology, particularly in antibacterial soft packaging using polyamide films, has become a research highlight. These films exhibit excellent performance, suitable for diverse packaging needs.
2.1 Polyamide Films
Polyamide films find extensive applications in packaging materials due to their antibacterial properties, heat resistance, and gas barrier performance, making them an ideal choice for daily necessities packaging, electronic product packaging, and food packaging. Although they have a high melting temperature, innovative applications of surface activation technology have successfully addressed processing difficulties.
2.2 Polyethylene Films
Polyethylene films are widely used in food packaging, agriculture, and medicine. Low-density polyethylene (LDPE) films, favored for their low cost, elasticity, transparency, and thermal resistance, are the preferred choice for various packaging needs. Although LDPE films may be influenced by environmental factors, this has not hindered their widespread use in different fields.
2.3 Polyvinyl Alcohol Films
Polyvinyl alcohol films are extensively used in areas such as optoelectronics, flame resistance, medicine, and food preservation, thanks to their strong polarity and antistatic properties. Despite challenges in water resistance and thermoplastic processing, their approved usage in the packaging of meat and poultry products underscores their significance in specific applications.
3 Biodegradable Films
Biodegradable films, based on biodegradable materials, are crucial for environmental protection and exhibit significant development potential. Polylactic acid (PLA) is a representative material, and although it has limitations in impact resistance, ongoing optimization efforts make it increasingly prominent in the packaging field.
The research and application of these packaging film materials are fully reflected in the machinery of Jill Group, ensuring their efficient utilization in the field of food packaging.