JPS60257835A - Dehumidifier - Google Patents

Abstract

PURPOSE:To inhibit the fluidization of a deliquescent solution without lowering hygroscopicity, by forming a layer, to which a powder of polysaccharides gelled upon the swelling by water having usual temp. and/or a derivative thereof is adhered, to the surface of calcium chloride. CONSTITUTION:A proper amount of particulate calcium chloride dihydrate 2 is put in a rotary tank 1 and about 6wt% of calcium chloride 2 of water is sprayed to calcium chloride 2 by a sprayer while the tank 1 is rotated, while a powder of polysaccharides gelled upon the swelling by water having usual temp. or a derivative thereof is sprayed to calcium chloride, of which the surface is brought to a wet state, by a sprayer and drying is performed at usual temp. By this method, the powder 3 of polysaccharides or a derivative thereof is adhered to the surface of the particulate calcium chloride 2 in a covered state and fine gaps are formed to the layer of the powder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dehumidifier using calcium chloride.

Calcium chloride has excellent water absorption properties, but because it deliquesces due to water absorption, there is a problem in that there are restrictions on where and how it can be used as a dehumidifier.

Prior Art Conventionally, as a solution to this problem, first, calcium chloride is placed in a bag or container partially or entirely made of a sheet or nonwoven fabric made of a synthetic molecule that is impermeable to water and aqueous solution and moisture permeable. Second, calcium chloride is sealed in a bag or container as described above together with an adsorption base such as a sponge or pulp fiber mat; and third, for example, JP-A No. 5
As disclosed in Japanese Patent No. 7-209638, there is one in which calcium chloride is supported on a porous carrier such as vermiculite or perlite.

Among the conventional methods mentioned above, the first method is that the moisture-permeable sheet of the bag or container is easily torn due to pressure or other reasons, and deliquescent salt leaks out, causing damage to furniture and clothes.

It has the disadvantage of staining rugs, etc. The first method has the same disadvantages as above, and also has the disadvantage that it is bulkier because it requires an adsorption base several times the amount of calcium chloride. Furthermore, the third problem is that when the chloride in the pores of the porous carrier deliquesces, the pores are blocked, and the calcium chloride inside the pores no longer absorbs moisture, resulting in poor moisture absorption. It has its drawbacks. In addition, with conventional dehumidifiers, it is not possible to confirm even if the moisture absorption limit has been reached.
Many people use products without knowing that they have lost their water-absorbing ability.

The problem to be solved by the invention The purpose of the invention is to create a dehumidifying agent using calcium chloride that does not leak deliquescent liquid even if calcium chloride absorbs moisture and deliquesces, that is, to reduce the hygroscopicity of calcium chloride. It is an object of the present invention to provide a device that prevents the flow of deliquescent liquid without causing any damage, is easy to handle, and can easily confirm when the moisture absorption limit has been reached.

Means and Effects for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a method of applying calcium chloride that has the property of swelling and gelatinizing with water at a normal temperature on the surface of calcium chloride in the form of granules, slices, or other lumps. When deliquesced, the polysaccharide powder or its derivative powder adhering to the surface absorbs the deliquescent liquid, and eventually the whole becomes gel-like, and the flow of the deliquescent liquid is blocked. Furthermore, when a suitable pigment is added to the polysaccharide powder or its derivative powder, when the hygroscopicity is lost, the whole becomes gel-like and colored, so that it is more clearly confirmed that the hygroscopic limit has been reached.

As the calcium chloride, it is desirable to use industrial calcium chloride, which has good stability and is commercially available in the form of particles with a diameter of about 5++n.

The polysaccharide or its derivative may be of any type as long as it has the property of becoming gelatinous at normal temperatures.

Polysaccharides having the properties listed in List L that are currently produced in the F8 industry include tamarind, agar, konjac powder (or glucomannan), yellow mallow, sodium alginate, potassium alkinate, carrageenan, and gum arabic. , cutti gum, karaya gum, tragacanth gum, guar gum, locust bean gum, quince seed, Rcutin, xanthan gum, scleroglucan,
Examples include dextran, various starches, dextrin, and tancil gum.

In addition, polysaccharide derivatives having the above-mentioned properties that are currently commercially available include carboxymethylated products, hydroxypropylated methylated products, cationized products (or quaternary ammonium chloride), and ethyl monster,
There are various cellulose derivatives.

Two or more types of polysaccharides or derivatives thereof may be used in combination.

In order to attach the polysaccharide powder or its derivative powder to calcium chloride, put an appropriate amount of granular industrial water calcium chloride 2 into a rotating tank as shown in Figure 1, and add the chloride while rotating tank 1. calcium? Water approximately 6% of the weight of the navel was sprayed with a sprayer (not shown), and the powdered polysaccharide or derivative thereof was applied to the calcium chloride 2 whose surface became 5 g wet. Spray with a sprayer and dry at normal temperature.

When treated in the above manner, the polysaccharide powder or its derivative powder 3 adheres to the surface of the granular calcium chloride 2 in a sprinkled state as shown in Fig. 2, and fine gaps are formed in the layer of the powder 3. be done. When Calcilla chloride tz 2 begins to absorb moisture,
As shown in FIG. 3, the powder 3 becomes gelatinous while increasing its volume from the edges that are in close contact with the calcium chloride grains 2.

The amount of polysaccharide or the like to be attached varies depending on the type of polysaccharide or its derivative used, but it may be sufficient as long as it is sufficient to prevent calcium chloride from flowing when it deliquesces.

When tantil gum, tamarind, etc. are used as polysaccharides,
Approximately 10% or more of the weight of calcium chloride in industrial water can prevent the flow of deliquescence, and the weight ratio of calcium chloride to calcium chloride is 20% or more.
~25% is a suitable amount. When using konjac powder etc., the amount may be slightly less than the above amount. If the amount of polysaccharides, etc. is around 10% by weight of calcium chloride in industrial water, the dehumidifier will become soft and jelly-like when it absorbs moisture up to its moisture absorption limit, and if it is 20%, it will be as hard as sheep yellow. It won't break if you just pinch it with your fingers. The amount of water sprayed onto calcium chloride is adjusted depending on the amount of polysaccharide powder or its derivative powder to be attached to the surface of calcium chloride.

The dehumidifier according to the present invention swells because the polysaccharide powder or its di9-isomer powder is swollen by the deliquescent liquid.

This expansion in volume may be more or less W depending on the polysaccharide used, or approximately twice the original volume.

When actually using the dehumidifier of the present invention, it is sealed in a bag made of a moisture-permeable film or non-woven fabric, or partially in a container made of the above-mentioned film or non-woven fabric, so that moisture is kept away until it is used. Keep it between the cloths to prevent it from getting inside. In addition, if you use one or several dehumidifiers sealed in a moisture-permeable film or non-woven bag in a container with one ventilation hole, you can discard the dehumidifier that has lost its moisture-absorbing ability and replace it with a new one. Can be replaced with a bag. When enclosing in a bag or container,
It is necessary to use a bag or container whose volume is at least as large as the volume of the dehumidifier expands.

Example As shown in Figure 1, the following prototypes were prepared by adhering tancil gum powder to calcium aqua regia chloride, and these were placed in transparent bottles and placed in a humid room until the moisture absorption limit was reached. , the final volume increase ratio to the original content, the hardness state of the gel-like material, the amount of water absorption, etc. were investigated.

・→1 400g of calcium chloride is coated with about 40g of polysaccharide powder.

・Φ, Approximately 60g of polysaccharide powder attached to 400g of calcium chloride.

lφ), about 80 g of polysaccharide powder attached to 400 g of calcium chloride.

lΦ, about 100 g of polysaccharide powder attached to 400 g of calcium chloride.Results: Volume increase ratio (→) ~ (approximately double in 41 cases).

The hardness state of the gel-like substance) is a soft jelly state, t'f3') is an extremely soft pre-charged state, ・'(2 is a soft pre-charged state, (4) Ordinary sheep (9) The condition appeared.

Water absorption amount.

The weight of the gelled contents is (on the axis, the weight of the original weight =
Slightly more than twice as much for Jō, approximately 2.2 times for ■, and 2.35 times for Zeri.
In d., it increased by 25 times.

Tests using Tamarin F Kerselbauter, hydroxypropyl derivatives, etc. as polysaccharides were also carried out, and the results were almost the same as those described above.

According to Example 1-, the amount of water absorbed was approximately equal to the weight of calcium chloride, indicating good water absorption efficiency, and it was found that polysaccharides and their derivatives did not reduce the water absorption rate of salts.

In the example of using anhydrous calcium chloride in place of lucium, in order to obtain the above results in the hardness of a gel-like substance, the polysaccharide powder should be prepared as follows: In this case, the volume increase ratio after water absorption and the weight of the gel-like material were on the same level as the above results. This is because anhydrous calcium chloride absorbs more than twice its own weight of water.

The dehumidifier according to the present invention has polysaccharide powder or/and derivative powder thereof that has the property of swelling and gelatinizing with water at a normal temperature on the surface of calcium chloride in the form of granules, slices, or other lumps. This prevents the flow of deliquescent fluid that occurs due to adhesion, making it extremely easy to handle, and does not stain containers containing dehumidifiers, furniture, rugs, clothes, etc., and inhibits the natural moisture absorption ability of calcium chloride. There's nothing to do. Furthermore, when calcium chloride reaches its moisture absorption limit, the dehumidifier becomes gel-like, making it easy to confirm that it has lost its effective residual amount and moisture absorption capacity, and to use the dehumidification agent without knowing that it has lost its moisture absorption capacity. This can also be prevented.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a device for adhering polysaccharide powder or its derivative powder to calcium chloride, Figure 2 is an enlarged cross-sectional view of calcium chloride grains with the powder adhered to the surface, and Figure 3 is the calcium chloride powder. It is an enlarged cross-sectional view of a state in which the grains have begun to absorb moisture. Patent applicant Yoshimasa Yokoyama

Claims (2)

[Claims] (1) - Wetting agent by swelling (with water at normal temperature) on the surface of calcium chloride in the form of granules, slices or other lumps. (2) The dehumidifier according to claim 1, wherein the calcium alumide is industrial water calcium chloride.