Dehumidifier container

Abstract

The objective is to provide a drug container that improves the loading efficiency of transport vehicles and, when in use, exhibits sufficient moisture absorption capacity and ensures a sufficient amount of moisture absorption simply by peeling off the release sheet. [Solution] The dehumidifier container 10 comprises a deliquescent agent 12 and a bag 14. The bag 14 comprises a microporous moisture-permeable, air-permeable sheet 16, an air-permeable, air-permeable sheet 18, and a release sheet 20. When not in use, the inside of the bag 14 has an absolute pressure of 1 kPa or more (5 × 10). 1 The reduced pressure is defined as kPa or less. In the microporous moisture-permeable non-air-permeable sheet 16, the tensile elongation measured according to the Japanese Industrial Standard JIS-K-7127 is 10% to 50% for both MD and TD.

Description

[Technical Field]

[0001] This invention relates to a desiccant container. [Background technology]

[0002] Due to the recent trend towards energy conservation, there has been an increase in highly airtight homes with tightly sealed gaps that prevent outside air from entering. However, because these homes are highly airtight, natural ventilation within the house is hindered, and moisture can accumulate in certain areas, which can lead to mold growth and pest infestations. While mechanical dehumidifiers are sometimes used to combat humidity in homes and other buildings, dehumidifiers containing deliquescent agents are more commonly used for localized dehumidification in places like closets and drawers. One example of a chemical container for containing such a desiccant is one that consists of a hollow container body made of highly rigid resin, a moisture-permeable, air-permeable sheet (air-permeable sheet) covering the upper opening of the container body, and a release sheet covering the entire upper area of ​​the container body including the moisture-permeable, air-permeable sheet (see Patent Document 1). In a dehumidifier like the one described in Patent Document 1, when the release sheet is peeled off during use, moisture in the air that passes through the moisture-permeable, air-permeable sheet is absorbed by the chemical, the chemical gradually deliquesces, and eventually the container is filled with an aqueous solution of the chemical (deliquescent solution). Furthermore, there are dehumidifiers that use an airtight resin sheet and a non-porous, moisture-permeable sheet to form a bag-shaped container. When not in use, the inside of the container is degassed and sealed to reduce its volume, and when in use, the seal is released, and the air pressure inside the container is gradually returned to atmospheric pressure, thereby expanding the internal space and securing the volume (see Patent Document 2). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2010-274985 [Patent Document 2] Japanese Patent Publication No. 2001-259348 [Overview of the project] [Problems that the invention aims to solve]

[0004] Incidentally, the dehumidifier described in Patent Document 1 uses a highly rigid chemical container as described above, which makes it bulky when the unused product is distributed, thus hindering the loading efficiency of transport vehicles. Furthermore, generally speaking, dehumidifiers containing hygroscopic agents tend to have higher hygroscopic capacity the closer the distance between the hygroscopic agent or its deliquescent liquid level inside the container and the moisture-permeable, airtight sheet. However, in dehumidifiers like the one described in Patent Document 2, after the seal is removed, during the process of the deliquescent agent deliquescing, the weight of the deliquescent liquid stretches the non-porous moisture-permeable sheet, increasing the distance between the liquid surface of the deliquescent liquid and the non-porous moisture-permeable sheet, which can reduce the moisture absorption rate. Furthermore, non-porous moisture-permeable sheets tend to have a poor moisture permeability rate, and depending on the usage conditions, they may not be able to provide sufficient dehumidification. The present invention has been made in view of the above circumstances, and aims to provide a drug container that improves the loading efficiency of transport vehicles by eliminating the need for highly rigid drug containers, and that exhibits sufficient moisture absorption capacity and ensures a sufficient amount of moisture absorption simply by peeling off the release sheet when in use. [Means for solving the problem]

[0005] To achieve the above-mentioned objective, one embodiment of the present invention comprises a deliquescent agent and a bag containing the deliquescent agent, wherein the bag is composed of a moisture-permeable, airtight sheet forming the upper part, an airtight, airtight, airtight sheet forming the lower part, and a release sheet that peels off and covers the moisture-permeable, airtight sheet, and when not in use, the inner surface of the bag is under a reduced pressure sufficient to maintain a contracted state in close contact with the deliquescent agent, and when in use, the release sheet is peeled off, and the desiccant container is positioned with the moisture-permeable, airtight sheet facing upwards and the airtight, airtight sheet facing downwards, wherein the reduced pressure state is an absolute pressure of 1 kPa or more, 5 × 10⁻⁶ 1The pressure is less than or equal to kPa, and the moisture-permeable, air-permeable sheet is a microporous moisture-permeable, air-permeable sheet, characterized in that the tensile elongation of the microporous moisture-permeable, air-permeable sheet, as measured according to Japanese Industrial Standard JIS-K-7127, is 10% or more and 50% or less for both MD and TD. Furthermore, one embodiment of the present invention is characterized in that the air permeability (S / 100ml) of the non-moisture-permeable, non-air-permeable sheet is 300 or more and 500 or less. Furthermore, one embodiment of the present invention is characterized in that, when the desiccant container absorbs moisture, the distance D between the microporous moisture-permeable non-air-permeable sheet and the liquid surface of the deliquescence is maintained within 5 mm. [Effects of the Invention]

[0006] In one embodiment of the present invention, a highly rigid resin container can be omitted, the inner surface of the bag is maintained in a contracted state with the deliquescent agent in close contact, and the desiccant container is distributed to the market in the smallest possible size, thereby significantly improving the loading efficiency of transport vehicles. Also, absolute pressure of 1 kPa or more: 5 x 10 1 Because the dehumidifier container is kept under reduced pressure (below kPa), its shape remains unchanged, maintaining a consistent, non-bulky form. This allows it to be displayed alongside multiple other products in stores, which is advantageous for increasing sales volume of dehumidifier containers. Furthermore, since a microporous, moisture-permeable, air-permeable sheet with a tensile elongation of 10% to 50% is used for both MD and TD, the elongation of the microporous, moisture-permeable, air-permeable sheet can be suppressed during degassing or moisture absorption of the desiccant container. Therefore, the distance D between the inner surface of the bag and the liquid surface of the deliquescent solution can be kept small until the amount of moisture absorbed by the deliquescent agent reaches saturation, and the moisture absorption rate can be kept large until the amount of moisture absorbed reaches saturation. Furthermore, the air permeability (S / 100ml: Japanese Industrial Standard JIS-P-8117; the same applies hereafter) of the microporous, moisture-permeable, air-impermeable sheet is also low, which is advantageous in maintaining a small distance between the inner surface of the bag and the liquid surface of the deliquescence, and in keeping the moisture absorption rate high until the amount of moisture absorbed reaches a saturation point. Furthermore, when the desiccant container absorbs moisture, the distance D between the microporous moisture-permeable, air-permeable sheet and the liquid surface of the deliquescence is maintained within 5 mm, which is advantageous in maintaining a high moisture absorption rate until the amount of moisture absorbed reaches saturation. [Brief explanation of the drawing]

[0007] [Figure 1] In the diagram illustrating the dehumidifier container of the embodiment, (A) is a front view of the unused state, (B) is a front view of the mid-use state, and (C) is a front view of the final use state. [Modes for carrying out the invention]

[0008] The dehumidifier container 10 of the embodiment will be described with reference to Figure 1. The dehumidifier container 10 comprises a deliquescent agent 12 and a bag 14 made of a sheet (film) containing the deliquescent agent 12. Deliquescent agents 12 are composed of deliquescent salts such as calcium chloride, potassium chloride, magnesium chloride, manganese sulfate, citric acid, potassium carbonate, sodium hydroxide, calcium hydroxide, tetraphosphorus decoxide, and phosphoric acid. The deliquescent agent 12 absorbs moisture from the air and liquefies to become a deliquescent liquid 1202.

[0009] The bag body 14 is composed of a microporous moisture-permeable air-permeable sheet 16 that forms the upper part, an air-permeable air-permeable sheet 18 that forms the lower part, and a release sheet 20 that peels off and covers the microporous moisture-permeable air-permeable sheet 16. In this embodiment, as shown in Figure 1(C), when the moisture absorption of the deliquescent agent 12 reaches a saturated state, the bag 14 becomes a flat rectangular parallelepiped, with the top surface formed of a microporous moisture-permeable, air-permeable sheet 16, and the sides and bottom surfaces other than the top surface formed of an air-permeable, air-permeable sheet 18. In this invention, "non-moisture-permeable, non-air-permeable sheet" refers to a sheet that does not allow gases, including water vapor, to pass through, nor does it allow water in droplet form to pass through. As the non-moisture-permeable and non-air-permeable sheet 18, it is formed of a transparent material that is impermeable to gas and the deliquescent agent 12. As such a material, various conventionally known materials such as those with low tensile elongation that suppress elongation during degassing or moisture absorption, for example, polypropylene, polyester, polyvinyl chloride, can be used. The release sheet 20 is formed of a material that is impermeable to gas (air) and the deliquescent agent 12. As such a material, various conventionally known materials can be used, for example, polypropylene, polyester, polyvinyl chloride, films obtained by vapor-depositing a metal such as aluminum or laminating a metal foil on these materials, or laminates of these materials.

[0010] As the microporous moisture-permeable and non-air-permeable sheet 16, a microporous membrane such as a polyolefin sheet can be adopted, and for example, a commercially available product such as Ramiporam LH00-14 (Tokuyama NF Group Co., Ltd.) can be used. Note that the "microporous moisture-permeable and non-air-permeable sheet" in the present invention refers to a sheet that allows water in the form of water vapor to pass through, does not easily allow water in the form of liquid droplets to pass through, and does not easily allow gases other than water vapor such as oxygen and nitrogen to pass through, and has fine pores formed in the thickness direction. The moisture permeability of the microporous moisture-permeable and non-air-permeable sheet 16 measured in accordance with Japanese Industrial Standard JIS-Z-0208 (40°C-90%RH) is 5000 g / m 2 ·24h or so. For example, considering that the moisture permeability of the non-porous moisture-permeable sheet made of polyurethane as described in Patent Document 2 is around 900 to 2800 g / m 2 ·24h, the microporous moisture-permeable and non-air-permeable sheet 16 has a relatively high moisture permeation rate, which is advantageous for exhibiting sufficient dehumidifying performance.

[0011] In a factory, the deliquescent agent 12 is accommodated in the bag body 14, and as shown in FIG. 1(A), during degassing, the bag body 14 is brought to a reduced pressure state with an absolute pressure of 1 kPa or more and 5×10 1 kPa or less, which is sufficient to hold the bag body 14 in a contracted state where the inner surface of the bag body 14 is in close contact with the deliquescent agent 12, and in this state, the release sheet 20 is adhered to the microporous moisture-permeable and non-air-permeable sheet 16. During this degassing, it is conceivable that the microporous moisture-permeable and air-impermeable sheet 16 is brought into close contact with the deliquescent agent 12 and stretched. As the elongation increases, the microporous moisture-permeable and air-impermeable sheet 16 deflects, and during moisture absorption by the dehumidifying agent container 10, the distance D between the inner surface of the bag body 14 and the liquid surface 1202A of the deliquescent liquid 1202 has to be increased inevitably. In addition, during moisture absorption by the deliquescent agent 12, in the process where the deliquescent agent 12 deliquesces, the weight of the deliquescent liquid 1202 acts on the microporous moisture-permeable and air-impermeable sheet 16. That is, even during this moisture absorption, it is conceivable that the microporous moisture-permeable and air-impermeable sheet 16 is stretched by the weight of the deliquescent liquid 1202, and when further stretched in combination with the originally generated deflection, the distance D between the inner surface of the bag body 14 and the liquid surface 1202A of the deliquescent liquid 1202 has to be increased inevitably.

[0012] From such a viewpoint, the microporous moisture-permeable and air-impermeable sheet 16 having a tensile elongation measured in accordance with Japanese Industrial Standards JIS-K-7127 of 10% or more and 50% or less in both MD and TD is used to suppress the elongation of the microporous moisture-permeable and air-impermeable sheet 16 during degassing and moisture absorption. This is advantageous for maintaining the distance D between the inner surface of the bag body 14 and the liquid surface 1202A of the deliquescent liquid 1202 at an extremely small value, and is advantageous for maintaining the moisture absorption rate of the dehumidifying agent container 10 and ensuring a large moisture absorption capacity. In the present embodiment, the distance D during moisture absorption can be maintained within 5 mm, which is sufficient to maintain the moisture absorption rate of the dehumidifying agent container 10. Note that if the tensile elongation in both MD and TD is less than 10%, the flexibility of the sheet is low, which may make processing of the microporous moisture-permeable and air-impermeable sheet 16 difficult. In addition, when the tensile elongation in both MD and TD exceeds 50%, the change in the distance D between the inner surface of the bag body 14 and the liquid surface 1202A of the deliquescent liquid 1202 begins to be affected.

[0013] Furthermore, since a microporous, moisture-permeable, air-permeable sheet 16 with an air permeability (S / 100ml) of 300 to 500 is used, the volume of gases other than water vapor that penetrate the inside of the bag 14 during moisture permeation can be suppressed to an extremely small amount. This is advantageous in maintaining the distance D between the inner surface of the bag 14 and the liquid surface 1202A of the deliquescent liquid 1202 at an extremely small value. For example, it is possible to maintain the distance D within 5 mm. As a result, this is advantageous in maintaining the moisture absorption rate and ensuring a large moisture absorption capacity. Furthermore, if the air permeability (S / 100ml) is less than 300, gases other than water vapor will also pass through more easily, causing a rapid increase in the volume inside the dehumidifying container 10. As a result, it may become impossible to maintain the distance D within an appropriate range, which could impair the moisture absorption capacity. If the air permeability (S / 100ml) exceeds 500, it may become impossible to ensure the necessary water vapor permeability.

[0014] The volume of the deliquescent liquid 1202 when all of the deliquescent agent 12 is converted into deliquescent liquid 1202 can be calculated in advance. For example, with A grams of deliquescent agent 12, the volume is B cm. 3 Let's assume that the deliquescence is 1202. Therefore, capacity Bcm 3 By forming a rectangular parallelepiped bag 14, containing A grams of deliquescent agent 12 in this bag 14, and then degassing it to create a desiccant container 10, it is advantageous to ensure that the microporous moisture-permeable, air-permeable sheet 16 forming the upper surface of the bag 14 is always in contact with the liquid surface 1202A of the deliquescent liquid 1202 from the beginning to the end of use of the desiccant container 10. In this case, using a microporous, moisture-permeable, air-permeable sheet 16 with a tensile elongation of 10% or more and 50% or less for both MD and TD, as measured by the Japanese Industrial Standard JIS-K-7127, suppresses the elongation of the microporous, moisture-permeable, air-permeable sheet 16 during degassing and moisture absorption. This allows the distance D between the inner surface of the bag 14 and the liquid surface 1202A of the deliquescent liquid 1202 to be maintained at a small value such as 5 mm from the beginning to the end of use, which is advantageous in maintaining the moisture absorption rate.

[0015] Further, using the microporous moisture-permeable air-impermeable sheet 16 having an air permeability (S / 100ml) of 300 or more and 500 or less is advantageous for suppressing intrusion of air into the interior of the bag body 14 during moisture absorption, making it possible to maintain the distance D between the inner surface of the bag body 14 and the liquid surface 1202A of the deliquescent liquid 1202 at a small value such as 5 mm from the initial stage to the final stage of use, which is more advantageous for maintaining the moisture absorption rate. In the present embodiment, as the microporous moisture-permeable air-impermeable sheet 16, Lumiporam LH00-14 (Tokuyama NF Group Co., Ltd.) having an MD tensile elongation of 20%, a TD tensile elongation of 20%, and an air permeability (S / 100ml) of 300 as measured in accordance with Japanese Industrial Standard JIS-K-7127 is used, a polypropylene film with a thickness of 200 μm is used as the moisture-impermeable air-impermeable sheet 18, and a bag body 14 having a length of 15 cm, a width of 10 cm, a depth of 5 cm, and a volume of 750 cm 3 is provided. 230 g of calcium chloride was used as the deliquescent agent 12, which was accommodated in the bag body 14, five desiccant containers 10 were produced by degassing the interior of the bag body 14 to an absolute pressure of 20 kPa, and another five desiccant containers 10 were produced by degassing the interior to an absolute pressure of 2 kPa, and a moisture absorption test was conducted over a test period of 180 days under conditions of 25°C and 80%RH. In all ten desiccant containers 10, the distance D between the inner surface of the bag body 14 (the microporous moisture-permeable air-impermeable sheet 16) and the liquid surface 1202A of the deliquescent liquid 1202 could be kept within 5 mm from the initial stage to the final stage of the test period.

[0016] According to the desiccant container 10 of the present embodiment, after the deliquescent agent 12 is accommodated in the bag body 14, as shown in FIG. 1(A), during degassing, the interior of the bag body 14 is brought into a reduced pressure state of an absolute pressure of 1 kPa or more and 5×10 1 kPa or less, and the inner surface of the bag body 14 is held in a contracted state in close contact with the deliquescent agent 12, so that the desiccant container 10 is distributed on the market in a state held at the minimum necessary size, which is advantageous for significantly improving the loading efficiency of transport vehicles. Further, the desiccant container 10 has an absolute pressure of 1 kPa or more and 5×10 1Since the product is distributed to the market under a reduced pressure of kPa or less, the shape of the dehumidifier container 10 remains unchanged, with the inner surface of the bag 14 in a tightly contracted state in close contact with the deliquescent agent 12. This maintains a consistent, non-bulky shape, allowing it to be displayed alongside multiple other products in stores, which is advantageous for increasing sales volume of the dehumidifier container 10.

[0017] Furthermore, during use, the release sheet 20 is peeled off by the user from the microporous moisture-permeable non-air-permeable sheet 16, and the dehumidifier container 10 is placed in the area to be dehumidified with the microporous moisture-permeable non-air-permeable sheet 16 facing upwards and the non-moisture-permeable non-air-permeable sheet 18 facing downwards. As shown in Figure 1(B), when the release sheet 20 is peeled off from the microporous moisture-permeable air-permeable sheet 16, moisture in the room passes through the microporous moisture-permeable air-permeable sheet 16 and enters the inside of the bag 14, causing the deliquescent agent 12 to deliquesce and produce a deliquescent liquid 1202. As the deliquescent agent 12 deliquesces, the internal volume of the bag 14 gradually increases. Then, as shown in Figure 1(C), the dehumidifying function of the desiccant container 10 ends when the amount of moisture absorbed by the deliquescent agent 12 reaches a saturation point.

[0018] In this case, the elongation of the microporous moisture-permeable, air-permeable sheet 16 is suppressed when the desiccant container 10 is degassed or absorbs moisture. As a result, the distance D between the inner surface of the bag 14 and the liquid surface 1202A of the deliquescent liquid 1202 is kept within a small value such as 5 mm until the amount of moisture absorbed by the deliquescent agent 12 reaches a saturation state, and the moisture absorption rate can be maintained at a large value until the amount of moisture absorbed reaches a saturation state. Furthermore, the moisture permeability of the microporous, moisture-permeable, air-permeable sheet 16 is 5000 g / m². 2 • Approximately 24 hours, and the moisture permeability of the non-porous moisture-permeable sheet in Patent Document 2 is 900-2800 g / m². 2 Since it is around 24 hours, it is larger than that of a non-porous moisture-permeable sheet, and therefore, the desiccant container 10 is advantageous in that it can exert sufficient dehumidification capacity due to its large moisture permeability rate. Furthermore, the air permeability (S / 100ml) of the microporous moisture-permeable but air-impermeable sheet 16 is also small, and the distance D between the inner surface of the bag 14 and the liquid surface 1202A of the deliquescent liquid 1202 is kept within a small value such as 5 mm, which is advantageous in maintaining a high moisture absorption rate until the amount of moisture absorbed reaches a saturation state. [Explanation of Symbols]

[0019] 10 Dehumidifier container 12 Dehygroscopic drugs 1202 Deliquescent liquid 14 Bag body 16 Microporous moisture-permeable, air-permeable sheet 18 Non-moisture-permeable, non-air-permeable sheet 20 Release sheets

Claims

1. The device comprises a deliquescent agent and a bag containing the deliquescent agent. The bag is composed of a moisture-permeable, air-permeable sheet forming the upper part, an air-permeable, air-permeable sheet forming the lower part, and a release sheet that peels off and covers the moisture-permeable, air-permeable sheet. When not in use, the inner surface of the bag is subjected to a reduced pressure sufficient to maintain a contracted state in close contact with the deliquescent agent. A desiccant container in which, upon use, the release sheet is peeled off and the moisture-permeable, air-permeable sheet is positioned upwards and the non-moisture-permeable, air-permeable sheet is positioned downwards, The aforementioned reduced pressure state is 5 × 10 with an absolute pressure of 1 kPa or more. １ It is below kPa, The aforementioned moisture-permeable, air-permeable sheet is a microporous moisture-permeable, air-permeable sheet. In the aforementioned microporous moisture-permeable non-air-permeable sheet, the tensile elongation measured according to Japanese Industrial Standard JIS-K-7127 is 10% or more and 50% or less for both MD and TD. A dehumidifying agent container characterized by the following features.

2. The air permeability (S / 100ml: Japanese Industrial Standard JIS-P-8117) of the aforementioned microporous, moisture-permeable, non-air-permeable sheet is 300 or more and 500 or less. The dehumidifier container according to feature 1.

3. When the desiccant container absorbs moisture, the distance D between the microporous moisture-permeable, air-permeable sheet and the liquid surface of the deliquescence is maintained within 5 mm. The dehumidifier container according to feature 1.

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