How to distinguish the quality of aluminum foil bags

1.Aluminum foil bag printing quality: Check if there are obvious three colors at the joint of the two colors. The higher the realism level of the actual image, the better. Check if there are any phenomena such as drawing, fogging, blocking, or missing printing.

 2.Material for aluminum foil bags: The packaging bag needs to be odorless. Bags with odors generally make people feel that they do not meet hygiene standards and may also affect the normal use of the bag. If there is no odor, it is necessary to check the transparency of the bag, whether the clarity is uniform, and whether there is any impurity sensation.

3.The firmness level of aluminum foil bags: The firmness of bags can be mainly divided into two types: firmness and hot air firmness. Wuxi aluminum foil bags have different levels of firmness due to different materials used.

The main method of differentiation is to aim at the edge of the bag and tear it off by hand. Bags made of nylon and high-pressure film composite are generally difficult to tear by hand and can be used to hold heavier products such as stones, large particles, etc., while bags made of OPP heat sealed film are easy to tear and can only hold lighter products; After tearing open the bag, the shape and structure of the cross-section should be examined. If it is evenly torn from the middle of the bag's heat seal, it indicates that the heat seal of the bag is poor and the bag is prone to breakage during the production process; If it is torn from the edge, it indicates that the heat sealing quality is good; 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 use your hands to see if it can be separated. If it is not easy to separate, it means that the composite firmness is good, otherwise it is poor; In addition, to check the firmness and level of the bag, it is also necessary to check whether there are bubbles or wrinkles on the surface of the bag.

4.Appearance neatness: First observe the stiffness of the bag. Generally, the higher the flatness, the better, but this may vary depending on the material used. For example, bags made of a composite of nylon and high-pressure film will have wavy heat seals; It is also necessary to observe whether the edges of the bag are neat, the neater the better.