New materials development trend of soft packaging for food

　　Food is closely related to people's health, hygiene and safety of food is the most important, so the food packaging demand is very severe. In the category of food packaging, plastic composite flexible packaging accounted for a considerable share. Experts have pointed out that the future direction of development of new food packaging: plastic is improved, the development of new varieties and advanced function of strength and insulation, cutting dosage （thick）， repeated use, recovery of maintenance environment classification.

　　The use of active packaging skills will become a trend

　　The mutual effect between active packaging skills include gas inside the packaging and packaging and food. Active packaging can effectively keep food nutrients and flavor. Because the material science, biological science and gas packing forward, the active packaging technology develops very fast. Active packaging, such as oxygen nozzle bag packaging sterilization activity. In the meantime, active packaging sterilization sterilization is the active material and packing material combination system, is the addition of sorbitol, sorbic acid, salt, sodium benzoate, silver zeolite material to the production of packaging materials, and then make the molding into a container, so that the slow releasing sterilizing active ingredients. Active packaging is mainly used in food packaging, compared to the past by physical ways of sequestering gas, water vapor and light, it plays an active and automatic effect in prolonging the shelf life of food, can provide very good maintenance. Therefore, active packaging as a kind of intelligent skills are developed and widely used.

　　In the active packaging materials, in order to control specific gas within the package, the use of chemical substances can absorb or release the gas. The function of system includes the use of fungicides, deoxidizing agent, release agent, light odor absorbers or isolating agent, antifogging agent, antisticking agent, stabilizer and enzyme inhibitor and so on. Has now completed may be completed by the other active packaging system are: the anti oxygen, odor absorption and release the film system, anti adhesive film, anti fog film, light resistance and conditioning light components etc Active packaging is considered to be a revolutionary change in the packaging industry.

　　High isolation plastic has been widely used

　　This kind of packaging materials can not only enhance the food protection function, and can reduce the amount of plastic, and can be repeated use. For the high demand from processed foods for maintenance and vacuum packaging, nozzle bag, inflatable packaging and other conditions, usually with composite packaging, in the multilayer composite materials must have a layer above the high insulation material. The commonly used high isolation materials with aluminum foil, nylon, polyester. Follow the food to maintain demand advance, isolation of very good ethylene vinyl alcohol copolymer, polyvinyl alcohol, have begun to use. At present, the developed countries and a few of PEN （polyethylene naphthalene two formic acid glycol ester）， to bring a lot of food packaging. The chemical structure of PET and PEN （polyethylene terephthalate） is similar, but the rigid greatly, oxygen resistance, water resistance than PET forward several times, and the UV absorption, good gas adsorption is held low, the food does not smell, can be repeated use.