How to identify the quality of aluminum foil bags?

First is the material of the aluminum foil bag:

When looking at the sample to buy, smell it first to see if there is any special smell. If there is a peculiar smell, it does not meet the hygienic standards and may affect the normal use of the aluminum foil bag. If there is no special smell, you can check the transparency of the aluminum foil bag, whether the clarity is uniform, whether there is a sense of impurities, etc.

Second, look at the firmness of the aluminum foil bag:

The firmness of aluminum foil bags is mainly divided into two types, which are firmness and hot air firmness. Aluminum foil bags have different levels of firmness due to different materials. The main way to distinguish is to tear it by hand at the edge of the bag. Bags made of nylon and high-pressure film are generally difficult to tear apart by hand, and can be used to hold relatively heavy products such as semiconductor items, large particles, etc., while bags made of OPP heat-sealing film are easy to tear. It can only hold some light products; after the bag is torn, it depends on the shape and structure of the section. If it is torn evenly from the middle of the heat seal of the bag, it means that the heat seal of the bag is poor and it is easy to break during the production process. If the edge is torn off, it means that the quality of heat sealing is better; secondly, it depends on the composite firmness of the packaging bag. The method is to check how many layers of structure there are at the crack, and then see if it can be separated by hand. If it is not easy to separate , it means that the composite firmness is good, if it is pulled apart lightly, it means that the quality is poor; so to check the firmness of the aluminum foil bag, it is also necessary to check whether there are bubbles or wrinkles on the surface of the packaging bag.

Third, look at the uniformity of the appearance of the aluminum foil bag:

First observe the flatness of the aluminum foil bag. Generally, the higher the flatness, the better, but there may be exceptions due to different materials. For example, the packaging bag made of nylon and high-pressure film will have a wave shape at the heat seal of the bag; it is also necessary to observe whether the cutting edge of the packaging bag is Neat, the more tidy the better.

Fourth, look at the printing quality of aluminum foil bags:

For the printing quality of the aluminum foil bag, look at the physical picture, the more realistic the better. Secondly, check whether the bag has drawing, fogging, blocking, missing printing, etc. If this happens, it means that the printing is not standard.

The majority of users must pay attention when purchasing aluminum foil bags. The above are the key points to identify the quality of aluminum foil bags, judging from the materials used in aluminum foil bags, the firmness of the bags, the uniformity of appearance, and the printing quality of aluminum foil bags.