How to distinguish the quality of aluminum foil bags?

How to distinguish the quality of aluminum foil bags?

1, printing quality:

Look at the two color mosaics whether there is a clear third color, the higher the realistic level of the physical map, the better, to see if there are drawing, missing, fog, blocking and so on.

2, the materials used in the bag:

The bag needs no odor. Bags with odors generally feel that they do not meet hygiene standards and may also affect the normal use of the bag. If there is no odor, check the transparency of the bag, whether the clarity is uniform, and whether there is a sense of impurities.

3, the firm level of the bag:

The finished bag is generally torn by hand and is difficult to tear. It can be used to load relatively heavy products such as stones and large particles. The firmness is mainly divided into two types, which are consistent with the firmness and hot air fastness. The foil bag is different in level depending on the material. The main method of differentiation is to rip the hand at the edge of the bag. Nylon and high-pressure film composites, etc., and the bag made of OPP heat-sealing film is well torn, only some light products can be installed; after the bag is torn, it depends on the shape and structure of the section, if it is from the bag heat seal Evenly tearing in the middle indicates that the heat sealing of the bag is very poor, and it is easy to break the bag during the production process; if it is torn from the edge, the heat sealing quality is better; also depends on the composite firmness of the bag, the method is to first look at the crack There are several layers of structure, and you can see if you can separate it by hand. If it is not easy to separate, it means that the composite is firm and the opposite is bad. In addition, check the firmness of the bag and see if there are bubbles on the surface of the bag. Wrinkles and so on.

4, the uniformity of the appearance:

First observe the stiffness of the bag. Generally, the higher the flatness, the better, except for the different materials. For example, a bag made of a composite of nylon and high-pressure film, the heat seal of the bag will have a wave shape; it is also necessary to observe whether the cut edge of the bag is neat and tidy.