JPS6028531B2 - dehumidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dehumidifier for removing moisture in a space.

Additionally, sulfuric acid, activated carbon, activated alumina, activated bauxite, clay, synthetic zeolite, silica gel, calcium chloride, phosphorus pentoxide, and the like have been used as hygroscopic substances.

Among them, calcium chloride is widely used because it is inexpensive and has a high moisture absorption capacity. However, calcium chloride and phosphorus pentoxide liquefy when they absorb moisture.

For this reason, there are inconveniences such as breakage and staining of other items. This is why it has not been commonly used like silica gel, despite its strong moisture absorption ability.
The present invention is capable of liquefying a powder or granules of a deliquescent inorganic compound and a powder or granules of a hydrophilic polymer even after absorbing moisture by mechanically mixing the powder or granules of a hydrophilic polymer without melting or dissolving the hydrophilic polymer. The aim is to maintain excellent hygroscopicity and eliminate the above-mentioned drawbacks.

According to the present invention, by mixing a hydrophilic polymer with a deliquescent inorganic compound, a composite effect is brought about, and the hygroscopic ability of these hygroscopic substances is greatly improved. Examples of deliquescent inorganic compounds include calcium chloride,
Zinc chloride, tin chloride, magnesium chloride, manganese chloride, phosphorus pentoxide, etc. are used, but calcium chloride is inexpensive and has a large moisture absorption capacity, and phosphorus pentoxide has a large moisture absorption capacity. These are used in commonly available forms as powders or granules. As the hydrophilic polymer, polypinyl alcohol, hydroxymethylcellulose, polyethylene glycol, sodium polyacrylate, starch, sodium alginate, and natural gums (for example, gum arabic, gum tragacanth, locust bean gum, etc.) are used. It will be done. In particular, polyvinyl alcohol and sodium polyacrylate are easily available and have a large water absorption effect, so they are used effectively. It is preferable to use 0.5 to 50 parts by weight of the hydrophilic polymer based on 100 parts by weight of the deliquescent inorganic compound. If it is less than 0.5 parts by weight, it will not be possible to prevent the deliquescent inorganic compound from becoming liquefied, and if it is more than 500 parts by weight, the price of the composition will increase, which is not desirable.

These hydrophilic polymers are also used in commonly available forms as powders or granules. The absorbent composition of the present invention may include, for example, a colorant, a fragrance, an adsorbent,
Even if anti-fouling or other fillers are added, it can be used without any problem in terms of hygroscopicity.

In terms of usage, the dehumidifier of the present invention can be prepared by simply mechanically mixing the powder or granules of the above substances without melting or dissolving them, or by mechanically compacting the mixture and placing it in a container with a closure. The deliquescent inorganic compound does not liquefy even if it absorbs moisture, and as a result, it does not contaminate other items by breaking up. .

The dehumidifier of the present invention can be effectively used in living rooms, closets, closets, shoes, and other places where dehumidification is desired.

In addition, silica gel, etc. have traditionally been used to package products that are sold in airtight containers because they do not want to absorb moisture, such as glue, rice crackers, biscuits, other foods, other industrial products, and even equipment that does not want to rust. It can be used on previously used items for even more powerful effects. The present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples unless the gist thereof is exceeded.

Example 1 As shown in Table 1, 100 parts of calcium chloride and 20 parts of polyvinyl alcohol and 100 parts of calcium chloride and 100 parts of polyvinyl alcohol were simply mechanically mixed at room temperature to obtain a composition.

Store this composition indoors (temperature 13-18qo, humidity 62-7
After moisture absorption, weight measurement and morphology observation were performed.

The composition exhibited excellent hygroscopicity and was soft and cake-like.

As a comparative example, calcium chloride and silica gel were compared at the same time, and the results are shown in Table 2.

Hydrated calcium chloride is a hexahydrate salt, and as shown in Table 2, 200 g of hydrated calcium chloride is produced from 100 g of anhydrous calcium chloride, but according to the composition of the present invention, as shown in Table 1, only This shows a 50% increase in water absorption capacity compared to calcium chloride.

If polyvinyl alcohol is less than 2 parts by weight, it becomes liquid, and if it is more than 50 parts by weight, the cost of the composition increases, which is not desirable.

Table I *, Anhydrous calcium chloride, powdered or granular calcium chloride *2 Polymerization degree of 1000 or less, powdered, water-soluble type Table 2 *, Anhydrous calcium chloride, powdered or granular calcium chloride *2 Granular example 2 Table 3 A composition was obtained by simply mechanically mixing 100 parts of phosphorus pentoxide and 20 parts of polyvinyl alcohol, and 100 parts of phosphorus pentoxide and 100 parts of polyvinyl alcohol shown in the figure below at room temperature.

Store this composition indoors (temperature 13-18qo, humidity 62-7
After moisture absorption, the weight was determined and the morphology was observed. The composition was soft and cake-like. As a comparative example, 100 liters of phosphorus pentoxide was compared at the same time, and the results are shown in Table 4.

Table 3 *, Powder *2 Degree of polymerization 1000 or less Powder Table 4 *, Powder Example 3 Calcium chloride 100 times and sodium polyacrylate 0.5 times shown in Table 5 and calcium chloride 100 times and sodium polyacrylate 10 times were briefly mechanically mixed at room temperature to obtain a composition.

This composition was applied indoors (temperature 6 to 1 psi, humidity 80 to 95%).
), and after absorbing moisture, the weight was measured and the morphology was observed. The composition after moisture absorption was in the form of powder or block.
If sodium polyacrylate is less than 0.5 parts by weight, it becomes liquid, and if it is more than 50 parts by weight, the cost of the composition increases, which is not desirable. Table 5 *, Anhydrous Calcium Chloride Powdered or Granular Calcium Chloride *2 Powder Example 4 A simple mechanical mixture of 100% granular calcium chloride and the hydrophilic polymer shown in Table 6 was placed in a beaker, and the mixture was poured into a beaker. was placed on top of a sealed container containing water and kept at 30 ○ for one week.

Table 6 shows the weight and morphology of the mixture obtained after one week.

Table-6 Hydrophilic Polymer Mixture of axle bran for 1 week of pigs (lights in brackets) 1. Carboxomethyl cellulose [40] 275 Mochi-like made by Taicel: QM07360) 2. polyethylene glycol
[40] 260 Mochi-shaped (Steel Chemical: PE08) 3.
Starch reagent) [50) 230 Mochi-like 4. Starch [50] 290 M) Starch [
50〕280 Mochi-shaped (manufactured by Oji Bouchal: Kate Soel) 6. Argic acid sorter reagent) [40] 270 Mochi-like 7. Gum arabic reagent) [30) 250 Mochi-shaped 8
．． .

Claims (1)

[Claims] 1 Powder or granules of a deliquescent inorganic compound and powder or granules of at least one hydrophilic polymer selected from polyvinyl alcohol, carboxymethyl cellulose, polyethylene glycol, sodium polyacrylate, starch, sodium alginate, and natural gums. A dehumidifying agent characterized in that the hydrophilic polymer is mechanically mixed without melting or dissolving the hydrophilic polymer.