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How to distinguish the quality of aluminum foil bags

by:Supouches Packaging     2021-12-29
How to distinguish the quality of aluminum foil bags 1. Printing quality of aluminum foil bags: see if there is an obvious third color at the splicing place of the two colors. Phenomenon such as printing. 2. The material of the aluminum foil bag: the packaging bag needs to be free of peculiar smell. A bag with a peculiar smell generally makes people feel that it does not meet the hygiene standards, and may also affect the normal use of the bag. If there is no peculiar smell, you need to check the transparency of the bag, whether the clarity is uniform, whether there is a sense of impurities, and so on. 3. The firmness of the aluminum foil bag: the firmness of the bag is mainly divided into two types, in line with firmness and hot air firmness. Wuxi aluminum foil bags have different firmness levels due to different materials. The main distinguishing method is to align with the edge of the bag and tear it by hand. The bag made of nylon and high-pressure film is generally difficult to tear by hand. It can be used to hold heavier products such as stones, large particles, etc., while the bag made of OPP heat-sealable film can be torn easily. Pack some light products; after the bag is torn, look at the shape and structure of the cross section. If it is torn evenly from the middle of the heat-sealed part of the bag, it means that the heat-sealing of the bag is poor and the bag is easy to break during the production process; The edge tearing indicates that the heat sealing quality is better; it also depends on the composite firmness of the bag. The method is to first check how many layers of structure there are at the crack, and then check whether it can be separated by hand. If it is not easy to separate, it means The composite firmness is good, and vice versa; in addition, the firm level of the bag should be checked at the same time whether there are bubbles or wrinkles on the surface of the bag. 4. The neatness of appearance: first observe the stiffness of the bag. Generally, the higher the flatness, the better, except for the different needs of the materials. For example, a bag made of nylon and a high-pressure membrane will have a wave shape at the heat-sealed area. It is also necessary to observe whether the cut edges of the bag are neat, the more neat the better.
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