Materials of bag
When you buy, you can smell the smell. The first does not meet the health standards, the second is likely to affect the normal use of the bag. Otherwise if there is no smell, you can check the bag's transparency, clarity is uniform, no smell and so on.
The firmness of the bag
The firmness of the bag is divided into two kinds of firmness and hot air fastness. Wuxi aluminum foil bags because of different materials so strong level is also different. The main way to distinguish is to point to the edge of the bag with hand tear. Nylon and high-pressure film made of synthetic bags are generally hand-tear is difficult to tear can be used to install relatively heavy products such as stone, large particles, etc., and OPP heat sealing film made of the bag is very good tear, only Installed some light products; bags tear, to see the shape and structure of the cross-section, if it is from the middle of the bag heat sealing evenly tear, indicating that the bag is very poor heat sealing, the production process easily broken package, if it is from the closure Side of the tear, that the heat sealing quality is better; but also look at the bag compound firmness, the method is to look at the gap at a few layers of structure, and then look at the hand can not separate it, if not easy to separate, then explain The firmness is good, and vice versa; so check the firmness of the bag and see if there is any bubbles or wrinkles on the surface of the bag.
Appearance of the uniformity
Always observe the stiffness of the bag. The general flatness of the higher the better, but due to the different needs of the material, such as nylon and high pressure film made of bags, bags of heat sealing will be wavy; also need to observe the bag trimming is neat, more neat The better. Suzhou Jiasheng not only manufacture aluminum foil bags but also provide anti-static vacuum bags and vacuum bags.
Printing quality
Need to look at the quality of the printing of the bag to see the physical level of the real level as high as possible. If there is a description of the printing requirements are not standard to see if there is drawing, fog, blocking version, leakage and other phenomena. Now most manufacturers are cutting corners. The general distinction between the quality of aluminum foil bags from the printing quality, the appearance of uniformity, the bag of materials, bags to determine the firmness: a lot of people in the purchase of aluminum foil bags are in the quality of the problem is very worried.
