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The sealing performance of the aluminum foil bag is a key factor in the shelf life of the preserved contents. Therefore, we need to test the sealing of the aluminum foil bag before using the aluminum foil bag, and the common method for testing the sealing of the aluminum foil bag is to use The unsealed humidity test paper tests the tightness of the aluminum foil bag.
During the test, when the first arrow in the test paper turns pink, it means that you need to change the desiccant for the place where we store the parts. When the second arrow of the test paper turns pink, it means that we need to store the products for us. Check to see if it works.
First of all, we want to test the humidity of the test in the package delivery area. If the humidity test paper and hygrometer are exposed to the air for twenty minutes, the humidity on the side is about 70%. So we need to dehumidify the product. There are often packaged cabinets, waveguide boards and other electronic products stored there. The relative humidity ratio of the air quickly puts the humidity test paper and desiccant into the aluminum foil bag, and seals the aluminum foil bag with a sealing machine. The temperature of the sealing machine is most suitable from 170 °C to 200 °C.
It is the effect of sealing the aluminum foil bag. Put the sealed aluminum foil bag in the packaging area on the east for one hour, then use the scissors to remove the aluminum foil bag and find that the humidity test paper has not changed color, indicating that the air inside the bag is dry and dry. The absorption effect of the agent is very good, and the aluminum foil bag has no air leakage.
In the same step, the desiccant and the moisture sample paper that has just been taken out are placed in an aluminum foil bag, and the bag mouth is sealed, and then placed in a water bucket. After more than one hour of soaking, it is taken out and found that the humidity test paper is still not discolored. This can fully explain the sealing effect of the aluminum foil bag is very good.