The aluminum foil packaging bag is a bag made of multiple films. It has the advantages of shading, oxygen barrier, puncture resistance, high temperature resistance, etc., and is widely used in food, medical, pharmaceutical and other industries. When people receive aluminum foil bags, they need to inspect the goods to check whether the bags are firm and whether the printing is clear, etc., to ensure the quality of the aluminum foil bags. So how should aluminum foil bags be tested?
First, the appearance of the aluminum foil bag. First, check the transparency of the packaging bag, check whether there are impurities, and smell if there is any peculiar smell; secondly, check the flatness of the packaging bag. Generally, the higher the flatness, the better, and observe whether there are wrinkles in the heat-sealed area.
Second, the robustness of the aluminum foil bag. The hardness of aluminum foil bags can be divided into two types: hardness and hot air hardness. Due to the difference in sampling, the strength of the aluminum foil bag is also different. The key difference is pointing to the edge of the bag.
After the aluminum foil bag is torn off, the appearance and structure of the section should be considered. If the heat seal of the packaging bag is torn evenly in the middle, it indicates that the heat seal of the packaging bag is very poor and it is easy to break during processing. If it is torn off with wrapping paper, it means that the heat sealing quality is good.
Third, the composite firmness of the aluminum foil bag. The main distinguishing method is to align the edges of the vacuum aluminum foil 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 hold heavier products such as stones, large particles, etc., while the bag made of OPP heat-sealing film is easy to tear and can only be loaded Some light products; after the bag is torn, it depends on the shape and structure of the cross section. If it is torn evenly from the middle of the vacuum aluminum foil bag heat seal, it means that the heat seal of the bag is very poor and the bag is easy to break during the production process; if it is from The sealing edge is torn, indicating that the heat sealing quality is better.
It also depends on the composite firmness of the bag. First look at 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, otherwise it is poor; in addition, inspect the bag The level of firmness also depends on whether there are bubbles or wrinkles on the surface of the vacuum aluminum foil bag.
Fourth, the printing quality of aluminum foil bags. Check whether the printed pattern is clear, whether there is any wire drawing, missing printing, fogging, etc.