Film for food, as key materials for keeping food fresh, extending shelf life and ensuring food safety, play an important role in specific packaging scenarios according to their different materials. Polyethylene film (PE) is widely used in the packaging of vegetables, fruits, meat and other foods due to its good physical properties and moisture resistance. Especially in the fast food industry, PE film bags have become a common packaging choice for products such as coffee cups and lunch boxes.
Polypropylene film (PP), especially biaxially oriented polypropylene (BOPP) and cast polypropylene (CPP), occupy a place in dry food packaging and composite packaging inner layer materials due to their excellent physical stability and transparency. Polyester film (PET) is not only used in electronics and electrical fields due to its high transparency and dimensional stability, but also shows unique advantages in dry and puffed foods such as biscuits and outer packaging of medicines and cosmetics.
Although polyvinyl chloride film (PVC) has excellent barrier properties, it may contain a large amount of plasticizers, which will precipitate harmful substances when heated or in contact with grease, so its scope of use is limited and needs to be selected with caution. Polyvinylidene chloride film (PVDC) has become an ideal packaging material for foods with high preservation requirements, such as fresh meat, cooked meat, cheese and poultry products, due to its excellent barrier properties. Nylon film (PA) is particularly suitable for packaging greasy foods, fried foods and vacuum-packed foods due to its good transparency, heat and cold resistance, oil resistance and organic solvent resistance.
Aluminum foil composite film is widely used in many fields such as food, medicine, building materials and electronic products due to its excellent barrier properties and preservation effect, such as food bags, milk powder bags, coffee packaging, etc., effectively maintaining the freshness and nutritional content of food. As an environmentally friendly packaging material, degradable film can be decomposed by microorganisms in the natural environment, reducing environmental pollution. It is gradually replacing traditional non-degradable films and becoming an important trend in future food packaging. Different types of Film for food, with their unique properties and applicable scenarios, provide a variety of solutions for the food packaging industry.