As a kind of packaging products, the product protection function of aluminum foil bags is undoubtedly one of the basic functions that aluminum foil bags should have. Strict attention should be paid to the production quality to avoid all kinds of quality problems in the produced aluminum foil bags and appear 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 joint of the two colors. The higher the fidelity of the physical drawing, the better. Check whether there are wiredrawing, fogging, blocking, missing printing, etc.
2. bag materials
The packaging bag shall be free of odor. Bags with peculiar smell 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 of the bag, whether the clarity is uniform, whether there is a sense of impurities, etc.
3. firmness of bag
The firmness of bags is mainly divided into two types, i.e. compliance firmness and hot air firmness. Qingdao advanmatch packaging’s aluminum foil bags have different firmness levels due to different materials.
The main distinguishing method is to tear the edge of the bag by hand. Generally, the bags made of nylon and high-pressure film are difficult to tear by hand, and can be used to load heavy products such as stones and large particles, while the bags made of OPP heat sealing film are easy to tear, and can only load some light products; After the bag is torn, the shape and structure of the cross-section shall be considered. If the bag is torn evenly from the middle of the heat seal of the bag, it indicates that the heat seal of the bag is very poor and the bag is easy to be broken during production; If it is torn from the edge sealing, it indicates that the heat sealing quality is good; It also depends on the compound firmness of the bag. The method is to first see how many layers of structure there are at the crack, and then see whether it can be separated by hand. If it is not easy to separate, it means that the compound firmness is good, otherwise it is poor; In addition, the firmness of the bag shall be checked to see whether there are bubbles or folds 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 cutting edge of the bag is neat. The more tidy, the better.
Post time: Sep-08-2022