For the identification of silica gel water content, the most commonly used methods for desiccant use enterprises are as follows:

1. Seal a small amount of silica gel desiccant with a small amount of discolored silica gel, and observe the discoloration speed of discolored silica gel. If the discoloration speed is slow, the water content of the product is low.

Note: this detection method is scientific, but it can only indicate whether the moisture content of the silica gel desiccant detected exceeds the discolored silica gel. In addition, due to the different proportion of raw materials, the discoloration speed of the discolored silica gel itself will be different. Therefore, we are not fully convinced by this detection method.

2. Put a small amount of silica gel desiccant into the water and observe the intensity of its explosion when meeting water: if the explosion is fast and the explosion effect is strong, it is considered that the water content of the product is low and the adsorption capacity is good.

Note: in fact, the water explosion rate of silica gel desiccant is not related to the water content and adsorption capacity of silica gel. It can not reflect the moisture absorption of desiccant very well, because "explosion" or not is only instantaneous, and the water absorption performance is continuous.

It has been proved that the water content of the products with good explosion rate produced by some manufacturers on the market has reached or even exceeded 15%, while the adsorption capacity is far below the industry standard, which is totally unqualified.

3. The adsorption capacity of silica gel desiccant is due to its large number of nanoscale microporous structure, which does not need any external support. Dimethyl fumarate DMF is an independent fungicide, which is synthesized from certain chemical raw materials. On the other hand.

Silica gel desiccant can be identified as a kind of inorganic oxide, while dimethyl fumarate DMF is an organic compound, which is essentially two kinds of "fengma Niuxiang" products.

From the original point of view, dimethyl fumarate penetrates the cell membrane of microorganisms and enters the cells to play its bacteriostatic effect; while the silica gel desiccant plays a role by absorbing water in the air and destroying the living environment of "mould".

4. Feel if a small amount of silica gel is held tightly in the hand. If it is heated, it is of good quality.

Note: silica gel desiccant will release a certain amount of heat when absorbing moisture, but it is totally incorrect only by artificial feeling.

The main component of silica gel desiccant is silica. The production process of silica gel is more complex, and the production energy consumption is large, so the cost is relatively high. However, it has good safety performance and strong stability. It will not release adsorbates in high temperature environment, and has longer service life, and can be recycled and reprocessed.