Cold tolerance of the packaging bags

Cold tolerance is refers to the packaging bags with normal temperature after frozen frozen environment comprehensive comparison of various performance, usually expressed as a percentage. Packaging material is composed of various molecules, low temperature can influence the activity of the molecule. Molecular activity for the less sensitive at low temperature, it for the better low temperature resistance, the stronger the film resistance to low temperature performance. Low temperature resistant performance is weaker conversely. Bags of cold resistance test 1, under the status of the test sample, using pendulum impact bags, measured the minimum energy needed to break bags, and record A detailed data. 2, then take it to the model will be chilled or frozen, frozen frozen is completed, immediately a pendulum impact test, measure the minimum energy required to break bags, B and record data. 3, after the frozen frozen performance data in addition to the B to the packing bag of normal temperature environment performance data, it is concluded that the smallest percentage is the cold resistance of the packaging bags. Packing bags of cold tolerance of 96% or more is a conform to the requirements, the best quality bags in the frozen frozen cold tolerance is, little change in performance. Cold tolerance at the same time there is an important indicator, is frozen or freezing temperatures. Under the different temperature, cold tolerance is also as changing, which is resistant to low temperature - we usually said 40 ℃, said in a low temperature 40 ℃ environment, cold resistance reached more than 96% of the packaging bags. Cold resistance, the more good bags, frozen frozen products in the process of production, storage, transportation to better protect, prevent the damage. Packaging case of cold resistance test sample: quick-frozen dumplings bag test data: at room temperature, the model of the pendulum impact energy of 1325 j, in frozen - 25 ℃, the model of the pendulum impact energy decreased to 1057 j, the cold resistance is about 80% of the packaging bags, with good quality, cold tolerance and material far, easy to cause the damaged bags. Good cold resistance rate of frozen food packaging packaging supply bags are: transparent PET/NY/LDPE bag, aluminum foil bag, PET/AL/LDPE, aluminum plating film bags of PET/VMPET/LDPE, PET, LDPE, OPP/CPP and other low temperature resistant bags. They are in - 40 ℃ low temperature condition, cold resistance were more than 97%. Under the low temperature condition at the same time, ink colors, design effect is still fine, keep good cohesion and adhesion. So, frozen frozen food manufacturers, hurry to customize the packing bag of high-grade fine good cold resistance. Tags: food packaging frozen bags
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