JPH0761415B2 - Humidity control panel - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of an interior material of a cultural property storage or a humidity control material installed in a room.

[Conventional technology and its problems]

Conventionally, natural wood boards as the humidity control material, and recently, zonolite-based calcium silicate boards have been used. However, the above materials had a saturated moisture content of 20 to 30% and a small amount of moisture absorption, and were insufficient for a humid atmosphere or an overdry atmosphere.

In addition, there is a drawback that the humidity control ability is low in an environment where the moisture absorption / desorption rate is slow and the humidity changes in a short time. Therefore, as a panel with improved moisture absorption capacity, moisture absorbing / releasing fillers such as calcium chloride, lithium chloride, triethylene glycol, sodium polyacrylate, sepiolite, activated alumina, etc. are internally added to the voids of gypsum, cement, wood board, etc. As a result, the saturated moisture content is 40 to 100%, and the moisture adsorption amount within a predetermined time (7 days) is 4 to 6 as compared with the conventional example of the same thickness.
We have developed a double humidity control material. However, even the above materials have a drawback that their humidity control ability is insufficient in an atmosphere in which a rapid environmental change occurs.

The present invention has been made in view of the above-mentioned drawbacks of the conventional example, and the object thereof is to adjust the moisture absorption and desorption ability in a predetermined moisture absorption area to be extremely excellent and to sufficiently follow a sudden environmental change. We provide moisturizer.

[Means for Solving Problems] In order to solve the drawbacks of the conventional example, the present invention provides a porous moisture absorbing / releasing plate material (2) in which a hygroscopic filler is internally held.

A plurality of the porous moisture absorbing / releasing plate materials (2) are provided in the air layer (1).
Are arranged in parallel through.

These porous moisture absorbing / releasing materials (2) are integrated to form a humidity control panel (A).

Is adopted as a technical means.

The portion of the porous moisture absorptive and desorptive plate material (2) of the first layer that comes into contact with moisture (that is, the moisture absorptive surface) first has a high moisture content, and subsequently moisture spreads inside the plate material.

Since the air layer (1) between the first layer of porous moisture absorbing / releasing plate material (2) and the second layer of porous moisture absorbing / releasing plate material (2) has a lower humidity than the indoor humidity, Moisture is released to the air layer (1) from the back surface of the porous moisture absorbing and desorbing plate material (2) of the layer.

As a result, the hygroscopic force of the first layer of porous moisture absorptive and desorptive plate material (2) is restored, and continuous moisture absorption from the room is performed.

This relationship also applies to the relationship between the second and subsequent layers of the porous moisture absorbing / releasing plate material (2).

In the case of releasing moisture to the room, the opposite action is performed.

As a result, since there are a plurality of porous moisture absorptive and desorptive sheet materials (2) having a hygroscopic property via the air layer (1), a solid material having the same quality, the same moisture absorption area, the same thickness, or the same amount of water adsorption amount. The moisture absorption and desorption rate can be remarkably improved as compared with the humidity control material.

〔Example〕

The porous moisture absorptive and desorptive board material (2) used in the present invention is gypsum, cement, calcium silicate board, rock wool board, inorganic plywood such as ceramic sintered body, wood board such as fiber board and particle board. The porous body of No. 1 has strength that does not cause breakage or remarkable unevenness when absorbing moisture.

As the hygroscopic filler, deliquescent substances such as calcium chloride and lithium chloride, triethylene glycol, sodium polyacrylate, water-soluble polymers such as PVA, sepiolite, activated alumina, inorganic hygroscopic materials such as zonolite, grafted A water-insoluble polymer hygroscopic material such as starch or isobutylene maleic anhydride is used alone or as a mixture.

As an internal addition method to the porous moisture absorptive and desorptive plate material (2), a hygroscopic filler may be dissolved and impregnated into the above inorganic material or wood material, or may be kneaded and cured during molding.

As shown in FIGS. 1 and 2, the air layer (1) is provided with two or more porous moisture absorbing / releasing plate members (2) via a splint (3) or for forming the air layer (1). It is formed by extrusion molding while forming the hollow hole, and the sheet body (5) such as a resin is attached to the crosspiece (3) crosswise or the wood mouth surface (4) orthogonal to the hollow hole is attached to the side surface side. It is desirable to set the humidity state different from the atmosphere because the moisture is surely transferred to the porous moisture absorbing / releasing plate material (2) on the back surface side.

As described above, the present invention improves moisture absorption / desorption speed without increasing the contact area with the outside, and is used for humidity control in an atmosphere where the humidity changes from high to low, and the humidity control panel (A) In the porous moisture absorptive and desorptive plate material (2), the part in contact with moisture (moisture absorption surface) first has a high moisture content, then spreads inside the plate material, and if the air layer (1) in contact with the back surface side has low humidity, For example, it works to release moisture from the back side.

Therefore, in the initial stage of moisture absorption, the moisture absorption speed is fast (this is called the rising moisture absorption section) and gradually becomes low (this is called the damping moisture absorption section).

Now, the thicker the moisture absorbing / releasing material, the greater the amount of moisture adsorbed, so the humidity control capacity is improved, but since the moisture absorbing area is the same area as the thin porous moisture absorbing / releasing plate material (2), After passing the moisture absorption section, the moisture absorption rate becomes small. Therefore, the present invention shortens the spreading time of the surface adsorbed water into the plate material, which is a factor for reducing the moisture absorption rate, and improves the moisture release rate on the back surface side (in this case, the second layer of the porous moisture absorbent / release sheet material). By (2), the air layer (1) between the first and second moisture absorbing / releasing plate materials (2) is lower in humidity than the indoor humidity.), Thereby absorbing moisture in a limited moisture absorbing area. In addition, the speed is increased, and when the room is dry, the moisture release rate is high due to the opposite decrease, so that the room humidity is quickly responded to and the humidity is adjusted.
When the humidity control panel materials (A) are used in series, the air layer (1) is also vertically connected to the air layer (1).
Will be sealed, so the above humidity control panel material (A)
It is not necessary to block all of the individual air layers (1) from outside air.
In addition, a decorative material such as paper, cloth, or a moisture permeable coating that does not interfere with moisture permeability is attached to the surface layer, and a moisture barrier layer such as a resin sheet is attached to the back side (the side that does not absorb moisture) so as not to absorb moisture from the surface. It may be provided.
FIG. 3 is an experimental diagram showing the humidity control property of the present invention, in which the performance as a dehumidifying permeator is confirmed by sealing the four circumferences and forcibly depressurizing and sucking from one side. At that time, the vacuum suction unit (6) is cooled to discharge the moisture as condensed water.

〔Example〕

Hemihydrate gypsum / water / calcium chloride = 100/100 / 7.5 Weight ratio of 3 sheets of 19 × 19 × 5mm plate-like materials kneaded and molded through a 5mm stile to form an integrated humidity control panel. As a comparative example, a 19 × 19 × 15 mm plate-shaped body having the same composition as above was prepared.

The above two test specimens were placed on the bottom of an aluminum box of 20 × 20 × 35 mm, and the humidity in the closed space was changed every 2 hours, and the humidity was measured. The results are shown in FIG.

As a result, the space containing the comparative example has a large change in relative humidity and cannot cope with a short cycle environmental change, but the humidity control panel (A) of the present invention has a high moisture absorption / desorption rate. It was found that the humidity change was small and the humidity control performance was excellent.

[Experimental Example 1] As shown in FIG. 4, hemihydrate gypsum / water / calcium chloride = 100 /
Five plate-like bodies of 100/20 wt% and 150 × 150 × 5 mm were integrated through a 1 mm hollow layer, and a vacuum suction device was attached to one side.

As a comparative example, a 150 × 150 × 25 mm monolayer was prepared.

When the pressure was reduced to 250 mmHg in an atmosphere of 25 ° C and 60% RH,
In the example, 3 ml / hour of water can be collected, while in the comparative example,
1 ml / hour of water could be collected. Therefore, it can be seen that the humidity control panel of the present invention has high performance.

〔effect〕

According to the present invention, as described above, a porous moisture absorbing / releasing plate material is obtained by internally holding a hygroscopic filler in a porous material, and a plurality of porous moisture absorbing / releasing plate materials are arranged through an air layer that does not communicate with the outside. Since this porous moisture absorbing / releasing plate material is integrated to form a humidity control panel, when moisture is absorbed on the front surface side, moisture is immediately released on the rear surface side in contact with the low humidity air layer, and this moisture absorbing / releasing function is a few layers. Sequentially performed between the porous moisture absorbing / releasing plate materials arranged over, it is possible to significantly reduce the time for water to spread inside the material as compared with the thick porous moisture absorbing / releasing plate material, resulting in the same area. Homogeneous,
It was possible to remarkably improve the moisture absorbing / releasing rate as compared with the solid moisture absorbing / releasing material having the same thickness or the same amount of moisture adsorption.

[Brief description of drawings]

 1 is a perspective view of a first embodiment of the humidity control panel of the present invention, FIG. 2 is a perspective view of a second embodiment of the humidity control panel of the present invention, and FIG. 3 is an experiment of the humidity control panel of the present invention. Sectional view showing an example, FIG. 4 ... Comparative graph of an example of the present invention. (A) ... Humidity control panel, (1) ... Air layer (2) ... Porous moisture absorbing / releasing plate material, (3) ... Pike (4) ... Wood mouth surface, (5) ... Sheet.

Claims (1)

[Claims] 1. A plurality of porous moisture absorptive and desorptive plate materials in which a hygroscopic filler is internally added and held in a porous plate material are arranged in parallel with an air layer interposed therebetween, and the surface of the porous moisture absorptive and desorptive plate material is conditioned. A humidity control panel characterized by being used as a surface.