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. The tear strength MD of the microporous, moisture-permeable, air-permeable sheet 16 is between 10 and 55, and the tear strength TD is between 10 and 50.

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 Initiative] [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, dehumidifiers using non-porous moisture-permeable sheets, such as those described in Patent Document 2, sometimes failed to exhibit sufficient dehumidification performance depending on the usage conditions, due to the low moisture permeability of the non-porous moisture-permeable sheet. Furthermore, in the case of non-porous, moisture-permeable sheets such as those described in Patent Document 2, when degassing and sealing, the moisture-permeable sheet is pressed strongly against the deliquescent agent contained in the bag-shaped container, which can result in tearing of the non-porous, moisture-permeable sheet and product defects. This invention has been made in view of the above circumstances, and aims to provide a desiccant container that improves the loading efficiency of transport vehicles, prevents tearing of the moisture-permeable sheet during degassing, and ensures sufficient 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 1 The 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 tear strength MD of the microporous moisture-permeable, air-permeable sheet is 10N or more and 55N or less, and the tear strength TD is 10N or more and 50N or less. Furthermore, one embodiment of the present invention is characterized in that the air permeability (S / 100ml: Japanese Industrial Standard JIS-P-8117; the same applies hereinafter) of the microporous 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. Furthermore, as a microporous, moisture-permeable, air-permeable sheet, a tear strength MD measured according to Japanese Industrial Standard JIS-K-7128-1 is 10N to 55N, and a tear strength TD is 10N to 50N, with an absolute pressure of 1kPa or more and 5×10 1 The structure is designed to withstand reduced pressure below kPa, preventing the microporous, moisture-permeable, airtight sheet from rupturing during degassing and ensuring that the inner surface of the bag is tightly sealed against the deliquescent agent. 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, the low permeability (S / 100ml) of the microporous, moisture-permeable, air-impermeable sheet helps maintain a small distance between the inner surface of the bag and the liquid surface of the deliquescence, which is advantageous in maintaining a high moisture absorption rate until the moisture absorption 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. The non-moisture-permeable, non-air-permeable sheet 18 is formed from a transparent material that prevents the permeation of gases and deliquescent agents 12. Such materials can be any conventionally known material, such as polypropylene, polyester, or polyvinyl chloride, which have low tensile elongation and suppress elongation during degassing or moisture absorption. The release sheet 20 is formed of a material that is impermeable to gas (air) and the deliquescent chemical 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 on these materials or laminating a metal foil thereon, or laminates of these materials.

[0010] As the microporous moisture-permeable and gas-impermeable sheet 16, a microporous membrane such as a polyolefin sheet can be adopted, and for example, a commercially available product such as LAMIPOROUS LH00-14 (Tokuyama NF Group Co., Ltd.) can be used. The "microporous moisture-permeable and gas-impermeable sheet" in the present invention refers to a sheet that allows water in the form of water vapor to pass therethrough, does not easily allow water in a droplet state to pass therethrough, and does not easily allow gases other than water vapor such as oxygen and nitrogen to pass therethrough, and has fine pores formed in the thickness direction. As the microporous moisture-permeable and gas-impermeable sheet 16, a sheet having an MD tear strength of 10 N or more and 55 N or less and a TD tear strength of 10 N or more and 50 N or less as measured in accordance with Japanese Industrial Standards JIS-K-7128-1 is used. Further, the moisture permeability of the microporous moisture-permeable and gas-impermeable sheet 16 measured in accordance with Japanese Industrial Standards 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 under the same conditions is about 900 to 2800 g / m 2 ·24h, the microporous moisture-permeable and gas-impermeable sheet 16 has a relatively high moisture permeation rate, which is advantageous for exhibiting sufficient dehumidifying performance.

[0011] In a factory, the deliquescent chemical 12 is accommodated in the bag body 14, and as shown in FIG. 1(A), at the time of degassing, 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, which is sufficient to hold the bag body 14 in a contracted state in which the inner surface of the bag body 14 is in close contact with the deliquescent chemical 12, so that the bag body 14 is reliably held in the contracted state in which the inner surface of the bag body 14 is in close contact with the deliquescent chemical 12, and the release sheet 20 is adhered to the microporous moisture-permeable and gas-impermeable sheet 16 in this state. During this degassing process, the microporous, moisture-permeable, air-permeable sheet 16 is pressed firmly against the deliquescent agent 12. The microporous moisture-permeable non-air-permeable sheet 16 has micropores, and the deliquescent agent 12 also has fine protrusions. As a result, the fine protrusions get caught in the micropores, making it more prone to tearing compared to conventional non-porous moisture-permeable sheets, and it is susceptible to absolute pressure of 1 kPa or more (5 × 10). 1 It is conceivable that the microporous, moisture-permeable, air-permeable sheet 16 may frequently rupture when subjected to a reduced pressure of kPa or less. From this perspective, as a microporous moisture-permeable non-air-permeable sheet 16, a tear strength MD measured according to Japanese Industrial Standard JIS-K-7128-1 is 10N or more and 55N or less, and a tear strength TD is 10N or more and 50N or less, and an absolute pressure of 1kPa or more is 5 × 10 1 The structure is designed to withstand reduced pressure below kPa, preventing the microporous, moisture-permeable, airtight sheet 16 from rupturing during degassing, ensuring that the inner surface of the bag 14 is in close contact with the deliquescent agent 12 in a contracted state, and enabling the bag 14 to be distributed to the market in a contracted state with the inner surface of the bag 14 in close contact with the deliquescent agent 12.

[0012] 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.

[0013] When all of the deliquescent agent 12 has turned into the deliquescent liquid 1202, the volume of the deliquescent liquid 1202 can be calculated in advance. For example, with A grams of the deliquescent agent 12, it becomes B cm 3 of the deliquescent liquid 1202. Accordingly, when the bag body 14 forming a rectangular cuboid with a volume of B cm 3 is formed, A grams of the deliquescent agent 12 is accommodated in this bag body 14, and deaeration treatment is performed to produce the dehumidifying agent container 10, this is theoretically advantageous for keeping the liquid surface 1202A of the deliquescent liquid 1202 in contact with the microporous moisture-permeable and air-impermeable sheet 16 that forms the upper surface of the bag body 14 at all times from the initial use stage to the final use stage of the dehumidifying agent container 10.

[0014] Furthermore, using the microporous moisture-permeable and 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 5mm from the initial use stage to the final use stage, which is more advantageous for maintaining the moisture absorption rate. In the present embodiment, as the microporous moisture-permeable and air-impermeable sheet 16, Lamiporouse LH00-14 (Tokuyama NF Group Co., Ltd.) having an MD tear strength of 24N, a TD tear strength of 20N, and an air permeability (S / 100ml) of 300 as measured in accordance with Japanese Industrial Standard JIS-K-7128-1 is used, a polypropylene film with a thickness of 200μm is used as the non-moisture-permeable and non-air-permeable sheet 18, and the bag body 14 with a length of 15cm, a width of 10cm, a depth of 5cm, and a volume of 750 cm 3 is provided. Furthermore, 230g of calcium chloride is used as the deliquescent agent 12, which is accommodated in the bag body 14, five dehumidifying agent containers 10 are produced by performing deaeration treatment on the interior of the bag body 14 to an absolute pressure of 20kPa, another five dehumidifying agent containers 10 are produced by performing deaeration treatment to an absolute pressure of 2kPa, and a moisture absorption test is conducted for a test period of 180 days under conditions of 25°C and 80%RH. For all 10 dehumidifying agent containers 10, the distance D between the inner surface of the bag body 14 (the microporous moisture-permeable and air-impermeable sheet 16) and the liquid surface 1202A of the deliquescent liquid 1202 can be kept within 5mm from the initial stage to the final stage of the test period.

[0015] According to the dehumidifier container 10 of this embodiment, after the deliquescent agent 12 is contained in the bag 14, as shown in Figure 1(A), during degassing, the inside of the bag 14 reaches an absolute pressure of 1 kPa or more (5 × 10⁻¹⁰). 1 The reduced pressure is below kPa, the inner surface of the bag 14 is kept in a contracted state in close contact with the deliquescent agent 12, and the desiccant container 10 is distributed to the market in the smallest possible size, which is advantageous in significantly improving the loading efficiency of transport vehicles. Furthermore, the desiccant container 10 has an absolute pressure of 1 kPa or more, and is 5 x 10 1 Since 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.

[0016] 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.

[0017] In this case, 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 significantly higher than the non-porous moisture-permeable sheet in Patent Document 2, and therefore, the desiccant container 10 is advantageous in that it can exhibit sufficient dehumidification capacity due to its high moisture permeability rate. Furthermore, the air permeability (S / 100ml) of the microporous moisture-permeable but air-impermeable sheet 16 is also small, which allows the distance D between the inner surface of the bag 14 and the liquid surface 1202A of the deliquescent liquid 1202 to be kept within a small value such as 5mm, which is advantageous in maintaining a high moisture absorption rate until the amount of moisture absorbed reaches a saturation state. [Explanation of Symbols]

[0018] 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. The aforementioned microporous moisture-permeable non-air-permeable sheet has a tear strength MD of 10 N or more and 55 N or less, as measured according to the Japanese Industrial Standard JIS-K-7128-1, and a tear strength TD of 10 N or more and 50 N or less. 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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