JPH02229522A - Package of dehumidifying agent - Google Patents

Abstract

PURPOSE:To prevent the reduction of moisture absorbing ability by forming an inner bag with a water absorbing sheetlike body and an outer bag with a nonwoven fabric permeable to moisture but impermeable to water. CONSTITUTION:Steam present at the outside of a package of a dehumidifying agent passes through the moisture permeable parts 4 of the outer bag 3 of the package and the inner bag 2 and is absorbed in a moisture absorbing agent 1. Moisture meets with the passage resistance of the moisture permeable parts 4 and the inner bag 2 and reaches the moisture absorbing agent 1 and the amt. of moisture absorbed is limited. Since a large amt. of moisture is not quickly absorbed in the moisture absorbing agent 1, the moisture absorbing ability of the agent 1 is not reduced and packing work can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a dehumidifier package, and more particularly to a dehumidifier package in which a moisture absorbent is enclosed in a double-layered inner bag.

(Prior technology) Packing a dehumidifier package containing a moisture absorbent such as silica gel or quicklime to prevent rusting and deterioration due to moisture absorption of precision parts, foods, medicines, etc. that are packaged and packaged. , added during packaging.

Such a dehumidifier package conventionally consists of a single-layer bag made of filter paper, etc., and during use, the moisture absorbent contained therein may come out onto the surface of the package, or the moisture absorbent may The silica gel and quicklime used have a slow moisture absorption rate and a small amount of moisture absorption per unit weight, so they have the disadvantage of requiring large amounts to be used.

Furthermore, when quicklime is used as a moisture absorbent, it also has the disadvantage that it generates heat due to moisture absorption.

Compared to such quicklime and silica gel, deliquescent moisture absorbents such as calcium chloride and magnesium chloride absorb moisture at a faster rate and absorb a larger amount of moisture per unit weight.
The amount of moisture absorbent used is small, and it can be used in layers by impregnating paper or nonwoven fabric.

However, if these deliquescent hygroscopic agents are sealed in a single-layer bag made of a water-permeable sheet material such as filter paper, the liquefied hygroscopic agent will ooze out from the bag surface and cause damage to the packaging. It may cause deterioration of products such as precision parts or cause rust.

In order to eliminate such drawbacks, Japanese Utility Model Application Publication No. 17323/1983 discloses a dehumidifier in which a layered material impregnated with calcium chloride, etc. is enclosed in a single-layer bag made of a moisture-permeable but water-impermeable nonwoven fabric. A package has been proposed.

(Problems to be Solved by the Invention) In the dehumidifier package disclosed in the above-mentioned Jitsukasho, the micropores formed in the thickness direction of the nonwoven fabric used intersect in a complicated manner. Although gases such as water vapor (humidity) can pass through nonwoven fabrics, liquids such as water droplets cannot easily pass through nonwoven fabrics, so even if a deliquescent moisture absorbent is used, the moisture absorbent that has become liquid after absorbing moisture will ooze out from the IB. can be prevented.

By the way, a moisture absorbent having a deliquescent property represented by calcium chloride absorbs moisture at an extremely high rate, so a moisture absorbent package in which such a moisture absorbent is enclosed is generally sealed and stored in the package. .

However, when trying to use a dehumidifier package containing a deliquescent moisture absorbent as a dehumidifier package for products such as precision parts, it is recommended to remove the dehumidifier package from the storage package mentioned above and leave it indoors. Since the dehumidifier may absorb moisture rapidly in a very short period of time, and the moisture absorption capacity may decrease rapidly, it is necessary to strictly control the time the dehumidifier package is left indoors.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a dehumidifier package that does not rapidly absorb moisture in an extremely short period of time and does not have a decrease in moisture absorption capacity even when left indoors. (Means for solving the problem) i; Problems that the conventional dehumidifier packaging described above has;
In other words, the dehumidifier package having the structure of the present invention can prevent the dehumidifier package taken out from the storage package from absorbing moisture in an extremely short period of time.

That is, the present invention provides a package in which a moisture absorbent or a plate-like body containing a moisture absorbent is enclosed in an inner bag of a double bag, and the inner bag is composed of a sheet-like body having water absorption properties. The dehumidifier package is characterized in that an outer bag enclosing the inner bag is made of a moisture-permeable and water-impermeable nonwoven fabric.

In the present invention, a part of the outer bag is a moisture-impermeable transparent film, and the inner bag in contact with the transparent film has a water absorption display means for displaying the degree of water absorption of the inner bag.
It can be easily determined that the moisture absorbent in the dehumidifier package has absorbed moisture to an equilibrium state.

(Function) The dehumidifier package of the present invention consists of an outer bag made of moisture-permeable and water-impermeable nonwoven fabric and a water-absorbing inner bag. Moisture) passes through the outer bag and inner bag and is absorbed by the moisture absorbent.

For this reason, the humidity is subject to resistance from passage through the outer and inner bags of the dehumidifier package, which limits the amount of moisture that can reach and be absorbed by the moisture absorbent, so it is best not to leave the dehumidifier package indoors. Even if the moisture absorbent absorbs moisture rapidly in a very short period of time, the moisture absorbing ability will not decrease, and the dehumidifying agent package can be enclosed in the packaging of the product while maintaining sufficient moisture absorbing ability.

Furthermore, even if the moisture absorbent becomes liquid (water) due to deliquescence due to moisture absorption and becomes absorbed and retained in the inner bag, this water will not easily seep out to the surface of the outer bag. The product can be kept dry.

(Example) The present invention will be explained in more detail using drawings. The figure is a sectional view showing an embodiment of the dehumidifier package of the present invention.

Powdered calcium chloride as a moisture absorbent 1 is enclosed in an inner bag 2 made of filter paper, and the inner bag 2 is enclosed in an outer bag 3.

The outer bag 3 includes a moisture-permeable portion 4 made of a moisture-permeable non-woven fabric and a transparent portion 5 made of a moisture-impermeable transparent film.
It is made up of.

The il portion 4 is a nonwoven fabric obtained by forming rough aqueous fibers made of a thermoplastic polymer such as polyethylene or polypropylene into a sheet shape, and then bonding the fibers together at high temperature and high pressure.

Micropores intersect in a complicated manner in the thickness direction of this nonwoven fabric, and although gases such as water vapor can pass therethrough, liquids such as water cannot easily pass therethrough.

In addition, such a nonwoven fabric has moisture permeability (JISL-109
9 CaC1 (measured by 2 method) is 5500-7000g
/rrr/2411R (particularly preferably 6300~
6900g/trr/24Hr) and water pressure resistance (J
IS L-1092 (measured by high water pressure method) is 1200~
2500vw H20 (especially preferably 1700~1
500mm H20) is preferable.

Moreover, the transparent part 5 is a transparent film obtained by melt-casting polyethylene, polypropylene, or the like.

Since both the moisture permeable part 4 and the transparent part 5 are made of thermoplastic polymer, they can be easily formed into a bag shape by heat-sealing the ends of both, and the nonwoven fabric surface of the moisture permeable part 5 Because it is smooth, patterns, characters, etc. can be printed in multiple colors.

The filter paper constituting the inner bag 2 enclosed in such an outer bag 3 can be easily shaped into a bag by pressing both ends, sewing it with a sewing machine, or sandwiching a porous polyethylene film and heat-sealing it. be able to.

If the inner bag 2 is colored in a light color, the color tone will change from light to dark as the inner bag 2 absorbs water.
The degree of water absorption of the inner bag 2 can be observed through the transparent part 5.

The degree of water absorption in the inner bag 2 can also be observed by pasting an indicator obtained by impregnating paper or the like with a cobalt chloride solution and drying it on the surface of the inner bag 2 corresponding to the transparent part 5 of the outer bag 3. .

In this way, by providing the inner bag 2 with a water absorption display means that allows the degree of water absorption in the inner bag 2 to be observed from the outside of the outer bag 3, it is possible to judge the moisture absorption capacity of the dehumidifier package and the time to replace it. .

Note that the sheet-like material constituting the inner bag 2 may be any material as long as it has water absorbency; for example, a nonwoven fabric that has larger micropores than the nonwoven fabric used for the outer bag 3 and is moisture permeable and water permeable may also be used. can be used.

The moisture absorbent 1 enclosed in such an inner bag 2 may be granular calcium chloride instead of the powdered calcium chloride used in this example. It may also be a plate-like body obtained by impregnating paper or nonwoven fabric and drying it.

Magnesium chloride can also be used instead of calcium chloride. Furthermore, as a moisture absorbent, a water absorbing resin such as a resin obtained by graft polymerizing corn starch and acrylonitrile and hydrolyzing with sodium hydroxide, particularly preferably a mixture of the above resin and calcium chloride etc. is also used. can do.

The moisture absorbent 1 may contain a deodorant, a fungicide, an aromatic, and the like.

Next, the moisture absorption effect of the dehumidifier package according to this example will be explained.

Water vapor (humidity) outside the dehumidifier package passes through the moisture permeable part 4 of the outer bag 3 and the inner bag 2 of the package and is absorbed by the moisture absorbent 1. The thrust force for the moisture to pass through the humidification part 4 and the inner bag 2 in this way is
This is due to moisture absorbent 1.

However, since the moisture is subjected to passage resistance through the humidity distribution section 4 and the inner bag 2, the amount of moisture that reaches and is absorbed by the moisture absorbent 1 at the same time is limited.

Therefore, even if the dehumidifier package according to this embodiment is left in a room where there is a large amount of moisture, a large amount of moisture will not be suddenly absorbed by the moisture absorbent 1, so that the moisture absorption of the moisture absorbent 1 is prevented. No significant reduction in performance.

It should be noted that, for a relatively small amount of moisture, such as in the packaging of products such as precision parts and foods, the passage resistance of the il portion 4 and the inner bag 2 is extremely small, and the moisture is easily absorbed by the moisture absorbent 1.

When a deliquescent moisture absorbent such as calcium chloride is used as in this embodiment, the moisture absorption agent gradually turns into water and seeps into the water absorbent inner bag 2 due to moisture absorption.

The degree of water absorbed in the inner bag 2 is determined by the transparent part 5 of the outer bag 3.
This is displayed by a water absorption display means provided on the inner bag 2 corresponding to the water absorption indicator, and is observed from the outside of the outer bag 3.

In other words, if the inner bag 2 is colored in a light color, the extent to which it changes to a dark color, or if the inner bag 2 is affixed to paper etc. obtained by impregnating and drying cobalt chloride, By observing the degree of discoloration of cobalt from blue to red, it is possible to know the degree of water absorbed into the inner bag 2. In this way, the water absorbed into the inner bag 2 is absorbed into the outer bag 3. Since not only the transparent part 5 but also the moisture permeable part 4 is non-water permeable, it cannot seep out onto the surface of the outer bag 3, and all the moisture absorbed and absorbed by the moisture absorbent 1 is inside the outer bag 3. Retained.

Therefore, the moisture absorbed by the moisture absorbent l does not turn into water and come out of the outer bag 3 again, so precision parts
Products such as food can be kept in a dry state.

In the dehumidifier package of this embodiment, if it is desired to further increase the moisture absorption rate, it is possible to increase the moisture absorption rate by using a moisture permeable and non-water permeable non-woven fabric constituting the moisture-permeable part 4 without forming the transparent part 5. This is possible by forming the entire outer bag 3.

In addition, recycling of the dehumidifier package according to this example that has absorbed moisture is as follows:
This can be done by heating it in a microwave oven or the like.

The dehumidifier package according to the present example described above is preferably stored by being sealed in a moisture-impermeable package.

(Effects of the Invention) According to the dehumidifier package of the present invention, moisture once absorbed by the moisture absorbent does not ooze out of the package as water again, so it can be used for precision parts, foods, medicines, etc. that are sensitive to moisture. It can be suitably used for dehumidification during packaging.

Moreover, even if the dehumidifier package is not packaged together with products such as precision parts, and the dehumidifier package is removed from the storage package and left indoors, the moisture absorbing ability of the desiccant will not suddenly decrease and the moisture absorption capacity will be sufficient. It can be packaged with products while retaining its moisture absorption ability.

For this reason, it is not necessary to strictly control the time the dehumidifier package is left indoors, so the packaging work can be facilitated.

[Brief explanation of the drawing]

The figure shows a sectional view of a dehumidifier package showing one embodiment of the present invention. 1... Moisture absorbent, 2... Inner bag, 3... Outer bag, 4... Moisture permeable and non-water permeable nonwoven fabric, 5... Moisture impermeable transparent film.

Claims (1)

[Claims] 1. Add a moisture absorbent or moisture absorbent to the inner bag of the double bag. A package in which the containing plate-like material is enclosed The inner bag is a water-absorbent sheet. It is composed of a tab-shaped body that encloses the inner bag. The outer bag is a non-woven fabric that is moisture permeable and impermeable. It is characterized by being composed of Dehumidifier packaging. 2. Part of the outer bag is a transparent film that is not moisture permeable. and an inner bag in contact with the transparent film. is a water absorption table that displays the degree of water absorption of the inner bag. The dehumidifying device according to claim 1, further comprising indicating means. drug packaging.