GuangDong DuBa New Material Technology Co.,LTD

GuangDong DuBa New Material Technology Co.,LTD

Moisture Absorption Performance Evaluation of Hygroscopic Agent

2022 12/17

Throughout the year, the most troublesome time is "returning to Nantian". The quilt, floor, and walls are all wet, and items placed in wardrobes, shoe cabinets, or storage boxes are prone to mold and smell. At this time, the Hygroscopic Agent From Home, which is small in size and convenient to place, can come in handy~


Hygroscopic Agent CAO


The performance of hygroscopic agents with different components varies greatly, and the hygroscopic performance of hygroscopic agents is the most concerned by everyone.


Test method: With 80 days as the test time limit, the samples are placed in a constant temperature and humidity chamber at 25°C and a relative humidity of 80%, and the weight (that is, the moisture absorption) of each sample is weighed regularly and its changes are observed.

Hygroscopic performance of hygroscopic agent

1. Moisture absorption: calcium chloride > silica gel > bamboo charcoal/activated carbon.


According to the experimental results, the moisture absorption performance of calcium chloride is much higher than that of silica gel and bamboo charcoal/activated carbon.
It can even absorb up to 1000 grams of water. The least can also absorb 50 grams of water, which is twice that of silicone products.

2. The more calcium chloride, the better the moisture absorption effect.

Also in the products using calcium chloride as Hygroscopic Agent, the moisture absorption is directly proportional to the content of calcium chloride. That is to say, moisture-absorbing box > moisture-absorbing belt > small moisture-absorbing package.
You can place Hygroscopic Agent CAO of different specifications according to specific usage scenarios.

3. Bamboo charcoal/activated carbon component moisture absorbent performed the worst.

On the 58th day, the moisture absorption capacity of the three types of bamboo charcoal or activated carbon Masterbatch Hygroscopic Agent has reached saturation, that is, no longer absorbs moisture in the air, and the moisture absorption capacity is less than 1.5g.


Hygroscopic Agent CAO


Moisture absorption speed

The moisture absorption rate of the product will gradually slow down over time.

The moisture absorption rate was the highest in the first 7 days, and then gradually slowed down.


In the late stage of moisture absorption, products No. 13~20 are already close to the state of absorbing water and stop absorbing moisture.When returning to the south, it is best to change the dehumidifier once a week.