Selection criteria for frozen food packaging bags

Customers who often need frozen food packaging bags find us, including all aspects of packaging dumplings, noodles, ham sausages, and pot bottom materials. Often customers assume that all products that require freezing use the same product. However, the actual situation is quite different. Now let’s take a look at which frozen food packaging bags are suitable for our products.When choosing packaging materials for frozen food packaging, we must first study the sensitive factors that affect the main components of frozen food, especially the nutrients such as fat, protein, and vitamins, including light, oxygen, temperature, microorganisms, and physical and mechanical aspects. factor. Then, according to the protection requirements of the food content and the transportation environment, etc., the type of packaging material and the operation mode of the packaging technology are determined, so as to achieve the purpose of protecting the function and appropriately extending the storage period. 1, hygienicFrom a safety point of view, packaging materials that come into direct contact with food, such as plastic packaging bags, must be food-grade. Due to the packaging and transportation process of frozen food, it is often difficult to ensure that the whole process is in a coherent low temperature environment. Especially during the transfer and handling process, it is very likely that the temperature of the frozen food will rise significantly within a period of time. It is easy to breed bacteria. Packaging made of recycled materials or industrial-grade materials is not much different in appearance from packaging made of food-grade materials, but because it contains excessive plasticizers and other substances, once used, it will cause great harm to human health. 2,cold resistanceFrozen foods are usually-18Storage and circulation at ℃ or lower temperature, especially some frozen food with trays, the food is usually put together with the tray in the production process.-30Rapidly cool down under the condition of below ℃, until the temperature of the product center is-18℃ below, and then carry out packaging. In the case of a sudden temperature drop, the mechanical strength of the packaging material also decreases, resulting in the packaging material being fragile. Moreover, during the transfer and transportation of frozen food, it will inevitably suffer from various environmental hazards such as shock, vibration, and pressure. In addition, frozen foods such as dumplings and dumplings have a hard texture at low temperatures. It is easy to cause the bag to rupture and crack. This requires good low temperature performance of packaging materials. 3, impact resistanceFrozen 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 makes the interior Food is contaminated. The impact resistance of packaging bags can be measured by the pendulum impact test. 4, heat seal strengthIf the heat sealing strength of the packaging bag is not enough or the sealing is false, a slight impact can cause the seal to crack; if the heat sealing temperature is too high, it is easy to cause damage to the heat sealing layer, which will weaken the material strength at the sealing line. Or impact, it is easy to cause broken bags and large-scale rotten bags, and it is impossible to effectively protect the food inside. 5, tensile force, interlaminar peel strengthIf the peeling strength between the layers of the 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 the packaging bag to delaminate and fail to achieve its due load-bearing function, resulting in a reduction in the protection performance of the packaging bag and greatly shortening the contents of the food. shelf life. 6, puncture resistanceFrozen foods are generally hard after freezing, especially fish and meat products, which contain bones and hard objects. The packaging bags are easily broken after the products are squeezed during transportation and stacking, which damages the sealing performance of the packaging bags. Therefore, frozen food has high requirements on the puncture resistance of packaging bags. 7, pressure resistanceIn the process of transportation and handling, vibration, drop or impact will cause damage to the transportation package, and even the internal sales package, so relevant shock or drop tests should be carried out on the frozen food package. Ultimately, packaging materials that can protect the quality of frozen food, reflect its commodity value, and make the overall packaging cost reasonable are selected.