Usually Desiccant The industry uses the "weighing method" to measure the moisture absorption effect of desiccants. Whether it is a physically hygroscopic desiccant or a chemically hygroscopic desiccant, the "weighing method" can be used to test the moisture absorption effect. Desiccant of Haoyunbao desiccant 2g (45*60mm) as an example, the test steps are as follows

(1) Prepare materials: 2 plastic cups, a piece of fiber paper with good air permeability and hardness, and a package of unopened desiccant samples

(2) Fill a plastic cup with a cup of hot boiling water, place it on a flat table, and place the white paper on the plastic cup (the plastic cup should not touch the water)

(3) Open a package of desiccant, take out a small sample, weigh it, and record the weight M1 before moisture absorption Desiccant weight M1,

(4) Place the desiccant on the fiber paper and quickly cover it with another plastic cup to maintain a sealed environment.

(5) At 12h, 24h, 36h, 48h, etc., respectively record the weight M2 of the desiccant. (Wipe off the water droplets on the surface of the desiccant to ensure accurate data)

(6) Use (M2-M1)/M1*100% to obtain the moisture absorption rate of the desiccant at different times.

(7) Continue to observe until the weight of the desiccant no longer increases, and the maximum moisture absorption rate of the desiccant is obtained.

If the desiccant sample is too large, a plastic sealed box (food preservation box can be used), a small bowl, and a wire mesh that can withstand weight (plastic bowl, breathable white paper can be used) can be used to simulate the sealed environment required for desiccant moisture absorption;

Note: If you need to measure the moisture absorption rate in a short time, you can replace the hot boiling water after the water in the cup cools down. The purpose of using hot boiling water is to make the water vapor evaporate quickly, so that Desiccant the moisture absorption reaches saturation in a short time.