How to distinguish aluminum foil bag quality

1, aluminum foil bag printing quality: See whether there is an obvious third color at the splicing of the two colors, the higher the fidelity level of the physical picture, the better, to see if there is a phenomenon such as wire drawing, fog plate, blocking plate, leakage and so on.

2, aluminum foil bag materials: packaging bag need no odor. Smelly bags generally make people feel that they do not meet health standards, and may also affect the normal use of bags. If there is no odor, it is necessary 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 kinds, in line with the firmness and hot air firmness. Wuxi aluminum foil bags because of different materials, the firm level is also different.

The main way to distinguish is to tear the edge of the bag by hand, the bag made of nylon and high pressure film is generally difficult to tear by hand can be used to install relatively heavy products such as stones, large particles, etc., and the bag made of OPP heat sealing film is very good to tear, and can only install some light products; After the bag is torn, it is necessary to look at the shape and structure of the section. If it is evenly torn from the middle of the hot sealing place of the bag, it indicates that the hot sealing of the bag is poor and it is easy to break the bag during the production process. If it is torn from the edge, it indicates that the heat sealing quality is better; Also look at the compound firmness of the bag, the method is to first look at the crack there are several layers of structure, and then use the hand to see if it can be separated, if it is not easy to separate, it indicates that the compound firmness is good, and vice versa; In addition, the firm level of the bag is also checked to see whether the surface of the bag has bubbles or wrinkles.

4, the appearance of uniformity: we must first observe the stiffness of the bag. Generally, the higher the flatness, the better, except for the different needs of materials. For example, the bag made of nylon and high pressure film, the heat seal of the bag will be wavy; It is also necessary to observe whether the cut edges of the bag are neat, the neater the better.