Many people are worried about the quality of aluminum foil bags when they buy them. Now most manufacturers are cutting corners. Generally, the quality of the aluminum foil bag is judged by the quality of the print, the uniformity of the appearance, the material of the bag, and the firmness of the bag:
1. The material used for the bag: You can smell the smell first when you buy it. If there is any smell, the material of the bag will not meet the hygiene standard, and the second one may affect the normal use of the bag. On the other hand, if there is no smell, we can check the transparency of the bag, whether the clarity is uniform, whether there is any impurity and so on.
2. The firmness of the bag: The firmness of the bag is mainly divided into two types that are consistent with the firmness and the firmness of the hot air. The bag is different in firmness depending on the material. The main method of identification is to rip the edge of the bag by hand. If it is difficult to tear, the heat seal is firm. Otherwise it is not good. However, bags of different uses have different degrees of firmness. Bags made of nylon and high-pressure film are generally difficult to tear by hand. It can be used to load relatively heavy products such as stones, large particles, etc., while OPP is hot. The bag made of sealing film is well torn and can only be loaded with some light products;
After the bag is torn open, it depends on the shape and structure of the section. If it is evenly torn from the middle of the heat seal of the bag, the heat sealing of the bag is very poor, and it is easy to break the bag during the production process. If it is torn from the edge, it means The quality of the heat seal is better; it depends on the composite firmness of the bag. The method is to first look at the structure of the crack at the crack, and then see if you can separate them by hand. If it is not easy to separate, it means that the composite is firm. On the contrary, it is poor; so check the firmness of the bag and see if there are bubbles or wrinkles on the surface of the bag.
3. The uniformity of the appearance: first observe the stiffness of the bag, whether it gives a wrinkle feeling, generally the higher the flatness, the better, except for the different materials, such as the bag made of nylon and high-pressure film composite, There will be a wave shape in the heat seal of the bag; it is also necessary to observe whether the cut edge of the bag is neat and tidy.
4. Printing quality: We need to look at the printing quality of the bag. The higher the realistic degree of the physical map, the better. See if there is a clear third color in the splicing of the two colors. If there is any, the printing requirements are not standard. Whether there are drawing, fog printing, blocking, and printing.
The above is the knowledge about aluminum foil bags shared by Mingtai. It should be noted that Mingtai Aluminum is a professional aluminum foil and foil manufacturer (not producing aluminum foil bags), producing aluminum sheet and aluminum foil products with good quality. , no burr, can be used in various fields.