As one of the packaging products, the product protection function of aluminum foil pouches is undoubtedly one of the basic functions that aluminum foil bags should have. Strict attention should be paid to the production quality to avoid various quality problems of 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 whether there is an obvious third color at the junction of the two colors. The higher the fidelity of the physical picture, the better. Check whether there are wiredrawing, fogging, blocking and missing printing.
2. Materials for bags
The packaging bag shall be free of odor. Bags with odor generally make people feel that they do not meet the hygiene standards, and may also affect the normal use of bags. If there is no odor, it is necessary to check the transparency, clarity and impurity of the bag.
3. Firmness and level of bag
The firmness of bags is mainly divided into two types, i.e. compliance firmness and hot air firmness. Qingdao Advanmatch packaging aluminum foil bags have different firmness levels due to different materials.
The main distinguishing method is to align 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, and can be used to carry heavy products such as stones and large particles, while the bag made of OPP heat sealing film is easy to tear, and can only carry some light products; After the bag is torn, the shape and structure of the section shall be determined. If the bag is torn evenly from the middle of the bag heat seal, it indicates that the heat seal of the bag is poor and the bag is easy to be broken during the production process; If it is torn from the sealing edge, the heat sealing quality is good; The composite firmness of the bag should also be checked. The method is to first check the structure of several layers at the crack, and then check whether it can be separated by hand. If it is not easy to separate, it indicates that the composite firmness is good, and vice versa; In addition, the firmness of the bag shall be checked to see whether there are 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 different needs of materials. For example, if the bag is made of nylon and high-pressure membrane, the heat seal of the bag will be wavy; It is also necessary to observe whether the cut edges of the bag are orderly, and the more orderly the better.
Post time: Sep-19-2022