New development of food flexible packaging technology
with the increasing requirements of the market for food packaging, the following new development trends have emerged in food flexible packaging technology and equipment:
-- the new trend of food flexible packaging
HACCP management technology, including preventing impurities from mixing into meters, conveyor belts that can be heated for sterilization, impurity or metal detectors, environmental dust/plankton index testers, and environmental sterilization lamps, As well as dust collectors on the surface of various packaging materials; Container molding and filling system under sterile conditions; Transparent soft film automatic packaging system for vegetables and fruits to replace pallets (simplified packaging); With various shapes of access pockets that can be filled and discharged into the soft bag; PET bottle high-speed molding machine and filling system; Containers with a capacity of 1 ton; Aseptic system for rice packaging; Plastic containers for all kinds of milk, i.e. 200-500 ml containers with ultra long service life in international circulation; Technology to prevent peeling between layers of composite packaging materials due to containing a variety of food or seasoning ingredients; Pursue low-cost packaging equipment combined with circulation conditions; A system in which bag making and filling are carried out simultaneously; Flexible packaging materials that can discharge the gas generated by the instrument, and various functional packaging; It can be used for holograms of various printing and labels, and use precision holograms to prevent counterfeiting and prove the authenticity to attract attention
-- new function of food packaging materials
the primary function of packaging is to ensure the quality of food. Therefore, the functional characteristics of blocking water vapor and oxygen, no bubbles in winter, not easy to break on the ground, being able to heat sterilization and stir when eating, the heat-resistant problem of microwave heating, being economical, practical and beneficial to sales are all very important. In foreign countries, alcohol cartons sold during the festival are holographic to prevent counterfeiting. In addition, post food waste treatment is also of great concern, further indicating that the world is paying more and more attention to the treatment and comprehensive utilization of packaging waste
-- transparent PET film of new plastic film
some enterprises coat silicon oxide and aluminum oxide films on PET film, and use the barrier and transparency of this film to replace PVC and PVDC products that are separated from fossil fuels. Nylon film and 0PP film are often used as evaporation substrate, although they are still in the development stage, Due to the safety barrier of silicon oxide evaporated PET film, it is used instead of aluminum foil composite multilayer packaging materials as usual. However, its disadvantage lies in the comprehensive processing process of packaging materials, the use process or circulation process of packaging materials. Once the evaporated coating is subjected to external forces such as tension, thermal vibration, YBB method in the second level to comprehensively evaluate the sample and bending, the evaporated coating will be damaged and the barrier will be greatly reduced. Under the microscope, tiny cracks can be seen in the evaporated coating. Therefore, before using this film as a packaging material, it is necessary to master the quality changes of food in the actual situation. It is also necessary to pay attention to the use of nylon and OPP as substrates, because these substrates themselves are prone to stress and are difficult to bear the heat and tension in the evaporation process. At present, researchers are trying to change this situation by researching and developing evaporation coatings with stable performance
-- a world-class R & D base for aluminum magnesium alloy materials will be built in Northeast China.
after continuous research and development, many high-tech food packaging papers have emerged in the market, such as the thermal insulation paper developed in the United States, which can convert solar energy into heat energy, and its function is like a solar collector. Packaging food with this material, placed in a place with sunlight, can heat food, only by opening the package, The heat will dissipate
antiseptic paper produced by Japanese companies can be used for food packaging. The preparation method is to soak the base paper in an ethanol solution containing 20% succinic acid, 33% sodium succinate and 0.07% sorbic acid, and then dry it. Using this kind of paper to package the food with brine, it can be stored at a high temperature of 38 ℃ for 3 weeks without deterioration.
soybean dregs paper is a paper made of bean curd dregs into water-soluble paper, which has a wide range of applications, including the packaging of instant noodles, condiments, barbecue, cakes and fruits. The preparation method is to add fatty acid and protease into the tofu residue, decompose it, wash it with warm water, dry it into food fiber, and then add sticky items such as yam, taro, dextrin, oligosaccharide and polypropylene glycol
pomace paper is produced from apple pomace discarded in the food industry. Its preparation method is to pick up the seeds in the pomace, pound it into pulp, and add an appropriate amount of wood fiber. This kind of paper is easy to decompose after use. It can be used as compost or recycled for papermaking. It has low environmental pollution and can be used for food packaging