As a type of packaging product, aluminum foil bag packaging undoubtedly has one of the basic functions that aluminum foil bags should have. Strict attention should be paid to production quality to avoid various quality problems in the produced aluminum foil bags and their appearance in the market. Correspondingly, the production quality inspection of aluminum foil bags is also extremely important.

1. Printing quality

Check if there is a noticeable third color at the junction of the two colors. The higher the level of realism of the actual image, the better. Check if there are any phenomena such as wire drawing, misting, blocking, or printing leakage.

2. Material for 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 their normal use. 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 sense of impurities.

3. The firm level of the bag

The firmness of bags is mainly divided into two types, namely firmness and hot air firmness. The firmness level of aluminum foil bag varies depending on the material used.

The main distinguishing method is to align the edge of the bag and tear it by hand. Bags made of nylon and high-pressure film are generally difficult to tear open by hand and can be used to hold heavier products such as stones and large particles. Bags made of OPP heat sealing film are easy to tear open and can only hold some light products; After the bag is torn open, it is necessary to check the shape and structure of the cross-section. If the bag is evenly torn from the middle of the heat seal, it indicates that the heat seal of the bag is poor and it is easy to break during the production process; If it is torn from the edge, it indicates that the heat sealing quality is good; Also, it depends on the composite firmness of the bag. The method is to first look at the number of layers at the crack, and then use your hand to see if it can be separated. If it is not easy to separate, it indicates good composite firmness, and vice versa; In addition, the firmness and level of the bag should also be checked to see if there are any bubbles or wrinkles on the surface of the bag.

4. Appearance uniformity

First, observe the stiffness of the bag. Generally, the higher the flatness, the better, except for the need for different materials. For example, bags made of nylon and high-pressure film composite will have a wavy shape at the heat seal of the bag; It is also necessary to observe whether the cut edges of the bag are neat, the more neat the better.

5. Secondly, it is necessary to verify the qualifications of the manufacturer

The qualifications of manufacturers are also important, and legitimate factories are more guaranteed!