
1. Temperature resistance
Low temperature resistance is the basic characteristic of freezing food
packaging. Frozen products need to be stored at -18 ° C or lower temperature.
Some products need to be frozen under -30 ° C. The performance of packaging in
this environment will be reduced, resulting in fragmented packaging
materials.
At this time, it is necessary to pack not only to be resistant to low
temperature, but also adapt to the sudden drop in temperature.
Second, thorns and impact resistance
Frozen foods are generally relatively hard, especially dumplings, bone
-containing meat products, etc. If the packaging resistance of packaging is not
enough, foods may pierce the packaging during transportation and storage,
causing food to deteriorate. At the same time, frozen foods may be impacted by
external forces during transportation, unloading, and placement. Due to
vibration, falling or impact, etc., they have harm to transport packaging, and
even internal sales packaging.
If the packaging bag is poorly resistant, the risk of breaking the bag and
cracking of the packaging bag will be exacerbated. The impact of frozen food
packaging bags can be measured by impacting the hammer impact.
Third, high resistance
The storage and transportation of frozen products are under low
-temperature environments, but the transportation or consumers will get the room
temperature environment when purchasing. Therefore, freezing food packaging bags
need high -resistance, preventing products from contact with oxygen, and
preventing the evaporation of water vapor, and preventing the relocation of
toxic and harmful substances into food.
Fourth, safety
Safety is the quality that any food packaging bag needs, and the materials
that contact with food must reach the food grade. Due to the packaging and
transportation process of frozen foods, it is often difficult to ensure that the
whole process is in a coherent low temperature environment. Especially in the
process of transfer and handling, it is likely to cause the temperature of
frozen food to increase significantly within a period of time. It is easy to
breed bacteria. The appearance of the packaging or industrial -grade materials
is not much different from the packaging made of food -grade materials, but
because it contains super -standard plasticizers and other substances, once it
is used, it will cause great harm to human health.
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