The dosage of desiccant, the use of desiccant

The amount of desiccant depends on many factors: the size of the drying space, the properties of the packaging material, the storage environment of the packaged goods, the atmospheric conditions when sealing, the shelf life of the packaged goods, the degree of sealing of the packaging, etc. The desiccant table is provided below for reference only.

If you ship by sea, you can put some container drying strips around the container to keep the internal space of the container dry.

Desiccant. It is widely used in different fields, such as pharmaceutical, health care products, and diagnostic reagent industries. Pharmaceutical desiccant requires safety, environmental protection, non-toxic and harmless, as well as super hygroscopic performance and 100% degradable characteristics.

Pharmaceutical desiccant should obtain the "Registration Certificate of Pharmaceutical Packaging Materials" issued by the State Drug Administration.

What is a desiccant and what is its principle of hygroscopicity?

Desiccant is a kind of water remover that absorbs moisture from the atmosphere, and its drying principle is to physically remove water molecules.

Adsorption in its own structure or by chemically absorbing water molecules and changing their chemical structure to become another substance.

What are the main types of desiccant?

At present, there are three typical desiccant products in the desiccant industry:

The main ingredient --- silica gel desiccant is silica.

It is purified and processed from natural minerals into granules or beads. As a slightly adze, the pellet has a good affinity for water molecules. The most suitable hygroscopic environment for silica gel is room temperature (20 32) and high humidity (60 90%), which can make the relative humidity of the environment.

Reduced to about 40%.

Clay desiccant (montmorillonite.

-The appearance shape is a small gray ball, which is most suitable for moisture absorption in an environment below 50. When the temperature is higher than 50, the clay"Drain the water"The degree is greater"Absorbs water"Extent. But the advantage of clay is that it is cheaper.

Molecular sieve. Desiccant--- It is a desiccant product that is synthesized and has strong adsorption of water molecules. The pore size of the molecular sieve can be controlled by different processing processes, in addition to adsorbing water vapor, it can also adsorb other gases.

At a high temperature of more than 230 °C, it can still hold water molecules well. Advantages: Adaptable.

Disadvantages: low moisture absorption, poor environmental protection (non-degradable).

How to determine the amount of desiccant?

The amount of desiccant used depends on many factors: the size of the drying space, the properties of the packaging material, the storage environment of the packaged goods, the atmospheric conditions when sealing, and the shelf life of the packaged goods.

how tightly sealed the packaging is, and so on. When we design desiccant dosage for our customers, we need to understand the above in advance before we can make the best response.

If you use silica gel desiccant, it is generally calculated according to the amount of 500 grams used in 1 cubic meter, (because you don't know whether the object you put will release moisture, the air humidity content after putting it, and the air humidity you need to maintain in the box, so it cannot be accurately calculated). , you want the content and about a square * 500g square = 25g

How to use desiccant:

1. Before using desiccant products, carefully check whether the sealed bag is damaged.

2. Minimize the time of desiccant exposure in the air, which is an important rule to ensure the quality of desiccant production.

3. The desiccant should be placed in an environment with a relative humidity of 50%, and the humidity in the air is about 60%-90%. To protect against moisture, isolate your product from the air and place a desiccant to absorb the humidity in the internal space. In an unventilated environment.

Placing desiccant can generally achieve a moisture-proof effect ranging from 60 days to 120 days.

4. A cube of 500g of desiccant should be placed in a sealed box or container to play an effective role in moisture-proof adsorption.

Precautions for using desiccant.

1. When using, the desiccant should be put in a bag or box with the protected items, and it is recommended to seal and store the protected items for better use effect.

2. It is best not to expose the unused desiccant to the air for more than 2 hours, and it should be sealed and stored for later use.

3. The amount of desiccant is recommended to be selected according to not less than 2000 grams of desiccant per square meter. Here you can refer to the conditions (humidity or temperature) of the storage items in the space of the product you are protecting, as well as the tightness of the desiccant packaging material.

4. Although desiccant is a relatively environmentally friendly, safe and non-toxic product, any desiccant is inedible and cannot be eaten by mistake. Keep out of reach of children. Do not tear the desiccant bag and remove the desiccant, and the bag should not be used for other purposes.

To prevent misuse, keep away from food and drinks.

Desiccant, also called absorbent, is used in moisture-proof, mildew-proof, drying role, according to the adsorption mode and reaction products are divided into physical adsorption desiccant and chemical adsorption desiccant. The desiccant of physical adsorption includes silica gel, alumina gel, molecular sieve, activated carbon, bone charcoal, charcoal, mineral desiccant, or activated clay, etc., and its drying principle is to adsorb water molecules in its own structure through physical means.

Application of physisorption desiccant.

Desiccant is suitable for preventing instruments, meters, electrical equipment, medicines, food, textiles and other packaging items from moisture, desiccant is also widely used in shipping, because goods are often damp and deteriorated due to high temperature during transportation, desiccant can effectively dehumidify and prevent moisture, so that the quality of goods can be guaranteed.

1. Desiccant is used for moisture-proof of bottled drugs and food. Ensure the dryness of the contents and prevent the growth of various miscellaneous molds.

2. The desiccant can be used as a general packaging desiccant for moisture-proofing.

3. The desiccant can be conveniently placed in the packaging of various items (such as instruments, electronic products, leather, shoes, clothing, food, medicine and household appliances, etc.) to prevent the items from being damp, mildewed or corroded.

Application of chemisorption desiccant.

1. Acid desiccant: concentrated sulfuric acid, phosphorus pentoxide, used to dry acidic or neutral gases, of which concentrated sulfuric acid can not dry hydrogen sulfide, hydrogen bromide, hydrogen iodide of strong reducing acid gas;

2. Neutral desiccant: anhydrous copper sulfate, calcium chloride, general gas can be dried, but calcium chloride cannot dry ammonia;

3. Alkaline desiccant: soda lime (a mixture of CAO and NaOH), quicklime (CAO), NaOH solid, used to dry neutral or alkaline gas.

The use of desiccant is very simple, directly measure the size of the space and the humidity, so as to make the dosage according to the effect of the desiccant!

It depends on what you're using it for.

One pack of desiccant can be used for more than 1 year.

Because the service life of the desiccant is related to the environment in which it is located, including: air humidity, space tightness, temperature, space size and other conditions, its service life is not easy to know. It can only be said that it cannot be used when the absorption is saturated, but it can be used for at least about a year.

Desiccants refer to substances that can remove water from moist substances, and are often divided into two categories: chemical desiccant, such as calcium sulfate and calcium chloride, etc., which are dried by combining with water to form hydrates; Physical desiccants, such as silica gel and activated alumina, are dried by physical adsorption of water. The control of moisture is closely related to the yield of the product.

In the case of food, under proper temperature and humidity, bacteria and moulds in food can multiply at an alarming rate, causing spoilage, moisture and discoloration. Electronic products can also cause metal oxidation due to excessive humidity, resulting in defective products. The use of desiccant is to avoid the occurrence of defective products caused by excess moisture.

Desiccant. The dosage is selected according to the characteristics of your product, for example, your product has high requirements for humidity, so put it a little more. It also has to do with the environment of your space, if you are in a humid location, you can also put a little more.

Here are some general dosage references for desiccant:

Desiccant is suitable for preventing instruments, meters, electrical equipment, medicines, food, textiles and other packaging items from moisture, desiccant is also widely used in shipping, because the goods are often deteriorated due to high temperature during transportation, desiccant can effectively dehumidify and prevent moisture, so that the quality of the goods can be guaranteed by blind history.

The use of desiccant is as follows:

1. Desiccant is used for moisture-proof of bottled drugs and food. Ensure the dryness of the contents and prevent the growth of various miscellaneous molds.

2. The drying agent can be used as a general packaging desiccant for moisture-proof;

3. The desiccant can be easily placed in the grinding packaging of various items, such as instruments, electronic products, leather, shoes, clothing, food, medicine and household appliances, etc., to prevent the items from being damp, mildewy or rusty.