Three-dimensional bag manufacturers tell you the points to pay attention to when choosing food freezer packaging bagsWhen choosing packaging materials for frozen food packaging bags, we must first study the sensitive factors that affect the main components of frozen foods, especially the nutrients such as fat, protein, and vitamins, including light, oxygen, temperature, microorganisms, and physical and mechanical factors. influencing factors. Then, according to the protection requirements of the food inside, the transportation environment, etc., determine the type of frozen food packaging bag and the operation mode of the packaging technology to achieve the purpose of protecting the function and properly extending the storage period. 1, hygienic: Cong AnFrom the perspective of safety, packaging materials that are in direct contact with food, such as plastic packaging bags, must meet the requirements of food safety.grade. Due to the packaging and transportation process of frozen food, it is often difficult to ensure that the whole process is in a consistent low temperature environment, especially during the transfer and handling process, which may cause the temperature of frozen food to rise sharply for a period of time. Easy to breed bacteria. Packaging made of recycled or industrial grade materials is visually compatible with foodThere is not much difference in the packaging made of high-grade materials, but because it contains excessive plasticizers and other substances, once used, it will cause great harm to human health.2, cold resistance: frozen food is usually in-18℃ or lower temperature storage and circulation, especially some frozen foods with trays, the food is usually placed together with the trays in the production process-30Under the condition of below ℃, the temperature is rapidly lowered until the product isheart temperature at-18℃ below, and then packaged. In the case of a sudden drop in temperature, the mechanical strength of the packaging material also decreases, making the packaging material fragile. Moreover, frozen food will inevitably suffer from various environmental hazards such as shock, vibration, and pressure during transfer and transportation. In addition, frozen foods such as glutinous rice balls and dumplings have a hard texture at low temperatures. It is easy to cause the packaging bag to break and crack. This requires good low temperature performance of packaging materials.3, Impact resistance: Frozen food is easily damaged by external forces during transportation, loading and unloading, and shelf placement. When the impact resistance of the packaging bag is poor, it is easy to break the bag and open the bag, which not only affects the appearance of the packaged product, but also It can also contaminate the food inside. The impact resistance of frozen food packaging bags can be determined by the pendulum impact test.4Heat-sealing strength: If the heat-sealing strength of the frozen food packaging bag is not enough or the seal is false, a slight impact can cause the seal to crack; if the heat-sealing temperature is too high, it will easily cause damage to the heat-sealing layer, making the material at the sealing line weakened in strength, once subjected toStrong vibration or impact can easily cause broken bags and large areas of rotten bags, which cannot effectively protect the food inside.5, Tensile force, interlayer peeling strength: If the interlayer peeling strength of the frozen food packaging bag is small and the breaking force is not enough, the mechanical properties of the packaging bag will be poor, which will easily cause delamination of the packaging bag and fail to achieve the proper load-bearing function. The protective performance of the packaging bag is reduced, and the shelf life of the food inside is greatly shortened.6, Puncture resistance: Frozen food is generally hard after freezing, especially fish and meat products, which contain bones and hard objects. After the product is squeezed during transportation and stacking, it is easy to puncture the packaging bag, making the frozen food packaging bag The airtightness of the package is damaged, so frozen food has high requirements for the puncture resistance of the packaging bag.7, pressure resistance :In the process of transportation and handling, vibration, drop or shock will cause harm to the transportation packaging and even the internal sales packaging, so the equipment packaging bag tells you to carry out relevant vibration or drop tests on frozen food packaging bags. Choose packaging materials that can not only protect the quality of frozen food, but also reflect its commodity value, and make the overall packaging cost reasonable.