JPS63162023A - Moisture absorber with moisture absorption indicating agent - Google Patents

Abstract

PURPOSE:To easily prevent the change of quality of dry food, by providing an indicator which is so attached to a position on a gas permeable body or to gas nonpermeable body itself so as to be visible from the outside and displays the exhaustion of the moisture absorption capacity by changing color when a drying agent absorbs a specified amount, or more, of moisture. CONSTITUTION:A gas permeable membrane 13 of the same shape as the opening part 2b of one side of a vessel body 2 is adhered to the opening 2b, and the drying agent is fully packed in the vessel body 2 from the opening of the other side of the vessel with the gas permeable membrane downward. Then, a gas nonpermeable membrane 14 is adhered so as to be the indicator 7 on the lower side of the membrane. When the drying agent 6 exhausts the moisture absorption capacity, the indicator confronting the drying agent 6 is changed from red to blue by the absorption of moisture to display the exhaustion of the moisture absorption capacity. The display is visible through a transparent body 5 from a vessel 1, and informs the user of the exchanging time of the drying agent 6.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a hygroscopic device with a hygroscopic indicator that prevents the absorption of moisture in substances that change in quality due to moisture absorption, such as food products, and in particular, the +M structure is simple and the moisture absorption device can be used at a constant rate. The present invention relates to a hygroscopic device with a hygroscopic indicator that can immediately indicate that the hygroscopic ability has been lost when the moisture absorption capacity exceeds that level.

(Prior Art) Dried foods such as instant coffee, tea, and dried shiitake mushrooms are said to be delicious when they contain moisture of 50% to 40%. On the other hand, it is said that bacteria that spoil the taste of food do not germinate and multiply at humidity below 60%, so food should be stored at a humidity of 60% or less.
It is preferably 0% or less, preferably between 50% and .10%. To this end, conventionally, food was placed in an airtight container such as a bottle or can, and a bag filled with a desiccant such as silica gel or calcium chloride was enclosed inside the bottle or can to prevent moisture so as to maintain the humidity level. ing.

(Problems to be Solved by the Invention) However, with the above-mentioned preservation method, no excess air enters the interior until the bottle or can is opened, and therefore the amount of moisture that gets mixed into the air is limited, so there is not much of a problem. Once a bottle or can is opened and used, humid air flows in each time, and the dry air inside the container, which has been carefully dehumidified, instantly becomes the same state as humid air.

For this reason, desiccant agents such as silica gel and calcium chloride must be used to remove moisture from the container in a short period of time each time, and if the desiccant's moisture absorption capacity is exceeded, the food will no longer be able to maintain its dry state. It is something that changes in quality.

By the way, silica gel, which is used as a desiccant, accounts for about 30% of its own weight, and calcium chloride accounts for about 150% of its own weight.
It reaches the moisture absorption saturation point at The desiccant itself or the bag filled with the desiccant has no display function to indicate that its moisture absorbing ability has been lost, so if it is left as it is, food etc. may deteriorate.

(Means for Solving the Problems) Therefore, as a means for solving the problems of the conventional method, the present invention provides at least a portion of the container I, as illustrated in FIGS. 1 to 12. It is formed of a breathable body 3 and a non-breathable body 4, a desiccant 6 is interposed between the breathable body 3 and the non-breathable body 4, and the position of the non-breathable body 4 or the non-breathable body 4 is
The desiccant 7 is provided with an indicator 7 that is visible from the outside and that changes color and loses its ability to absorb moisture when the desiccant 6 absorbs more than a certain maximum amount of moisture.

(Function) According to the present invention, each time a bottle or can containing food or the like is opened, highly humid air flows into the bottle or wire, and the moisture is absorbed into the air-permeable body of the container l. 3 is first absorbed into the desiccant 6 adjacent to the breathable body 3, and gradually absorbed into the non-breathable body 4.
The hygroscopic action extends to the desiccant 6 adjacent to the non-breathable body 4, and finally, when the desiccant 6 adjacent to the non-breathable body 4 loses its moisture absorption ability, the desiccant 6 of the non-breathable body 4 comes into contact with or The indicator 7 provided at that position changed color, and the discolored state of the indicator 7 was visually recognized from the outside of the non-breathable body 4. The desiccant 6 lost its moisture absorption ability, so the desiccant 6 was replaced. This is to notify consumers that the time is right.

(Example) Hereinafter, a moisture absorber with a moisture absorption indicator as each preferred example of the present invention will be described in detail with reference to the drawings.

First, a first embodiment shown in FIGS. 1 to 3 will be described. In the figure, reference numeral 1 is a container for the FA device equipped with a moisture absorption indicator, and 2 is the main part of the container 1, which is integrally molded from metal or synthetic resin, with one end 2a tapered or pointed, and both sides open. It is a container body having an opening 2b, and 13 is a breathable paper, nonwoven fabric, felt, or porous film that is thermally welded, thermocompressed, or adhered (hereinafter simply referred to as adhesion) to one opening 2b of the container body 2. 14 is the breathable coating 13 of the container body 2.
A non-breathable coating such as a non-breathable film, resin membrane, glass, etc. is attached to the other opening 2b on the opposite side to the bonded surface of the container 1. It is composed of a breathable coating 14. 5 or 5' is a transparent or semitransparent body in which a part of the air-impermeable coating 14 is made transparent or semitransparent. 6 is a powder or granular desiccant such as linica gel or calcium chloride, and 7 is printed or coated on the side of the transparent body 5 of the impermeable film 14 facing the desiccant 6, and for example, becomes blue rather than red due to moisture absorption. This is an indicator containing cobalt oxide that changes color.

Then, a breathable coating 13 having the same shape as the opening 2b is attached to one opening 2b of the container body 2 shown in FIG. 2
Fill the container body 2 with the desiccant 6 from the other opening 2b (Fig. 2b), and then apply the non-breathable coating 1 from above.
4 is glued so that the indicator 7 is on the lower side (desiccant 6 side). In this manner, the non-breathable coating 14 is coated with the desiccant 6.
The air permeable film 13 is disposed so as to be located farthest from the breathable film 13 through the air permeable film 13.

When the tapered end 2a of the container 1 constructed as described above is inserted into a dry food, moisture in the air inside the bottle or wire will enter the container I through the breathable wave membrane 13. The food is captured by the desiccant 6 and kept in a dry state, but as time passes and the fibers are opened from time to time, new moist air enters the food.
The moisture in the atmosphere gradually spreads to the desiccant 6 on the non-breathable coating 14 side.
When the moisture absorbing ability of the desiccant 6 disappears, the indicator 7 facing the desiccant 6 changes color from red to blue due to moisture absorption, indicating that the moisture absorbing ability has disappeared, and the display is displayed on the transparent body 5 or Visible from outside the container 1 through the translucent body 5',
This is to notify the consumer when it is time to replace the desiccant 6. Note that FIG. 3 is a sectional view taken along line III-III in FIG. 1.

Next, in the second embodiment shown in FIGS. 4 and 5, the main part of the container 1, which is tapered at one end 2a, has a U-shaped cross section as shown in the sectional view of FIG. The container body 2 has a shape and has an opening 2b in the central direction, and a lid 12 that fits airtightly into a step 2d formed at the opening between the short sides 2c, 2c of the container body 2. Coating 1
3 is adhered to the back side of the opening 2b of the container body 2, and the non-breathable coating I4 is bonded to the side facing the breathable coating 13 of 1ti12, and the breathable coating 13, the non-breathable coating 14 and the container body 2 are bonded together. A desiccant 6 is placed in the space surrounded by both short sides 2c and 2c.
Fill it. Therefore, the non-breathable coating 14 is located farthest from the breathable coating 13 via the desiccant 6.

The lid 12 is provided with an opening t2b at a position corresponding to the opening 2b of the container body 2, so that the indicator 7 of the transparent body 5 formed on the non-permeable coating 14 can be visually recognized through the opening t2b. It is something to do.

The container I constructed as described above operates in the same manner as in the first embodiment, so the details will be omitted.
It goes without saying that the same effect can be obtained even if the adhesion positions of the air-impermeable film 3 and the air-impermeable film 14 are reversed from those of the previous embodiment.

Thirdly, in the third embodiment illustrated in FIGS. 6 to 8, the container l in FIG. 6 has a cylindrical shape in which a portion 2a of the container body 2 is tapered and the other end is open. A large number of small holes 15 are made in the cylindrical surface of the container body 2 except for one end 2a, and a desiccant 6 is filled into a bag 18 formed of an air-permeable coating I3 and stored in the container body 2.

On the other hand, a cylindrical edge 16 with a bottom at the opening of the cylinder is attached to the cylindrical container body 2, and a part of the top surface 16a of the M16 is formed with the transparent body 5 of the non-breathable coating 14. The indicator 7 provided on the back side of the bag is made visible to indicate the loss of moisture absorbing ability, and if the desiccant 6 loses its moisture absorbing ability due to moisture entering through the small hole 15, the bag filled with the desiccant 6 It replaces I8.

The container 1 shown in FIG. 7 is lighter-shaped and has a plurality of vertical slits 17 formed in the container body 2, and a desiccant agent is placed inside a bag 18 which has a breathable coating 13 on one side and a non-breathable coating 14 on the other side. 6 is filled and stored in the container body 2, and the lid 19 is closed.
This is to make it visible.

The bag 18 is made of a breathable film 13, and as in the embodiment shown in FIG. It is also possible to provide an indicator 7 on the surface of the drying agent 6 to visually confirm through the transparent body 5 on the top surface of A19 that the moisture absorption ability of the desiccant 6 has disappeared.

In the fourth embodiment shown in FIGS. 4, 9 and 10, 23 in FIG. 9 is a breathable felt instead of the breathable film, and the container body 2 of the third embodiment shown in FIG. The other parts are the same except that the small hole 15 in the cylindrical part is not provided.

In the case shown in FIG. 10, the container body 2 is formed of a transparent cylindrical non-porous body 4, and the tapered tip and the other end as a plug are plugged with a gas permeable body 3, for example, felt 23. An indicator piece impregnated with an indicator 7 is placed in the center of the container body 2, which is farthest from both ends, so that it can be seen from the outside, and the spaces on both sides are filled with a desiccant 6. .

Fifth, in the fifth embodiment illustrated in FIG. 1f and FIG. Then, the desiccant 6 is filled in the space, a part of the impermeable coating 14 is used as the transparent body 5, and an indicator 7 is provided on the inner surface facing the desiccant 6, and the indicator 7 is applied from outside the container 1. Once it is visible, place the moisture absorber inside the airtight container containing the food.

In addition to adhering the air-permeable film I3 and the non-air-permeable film I.1, as shown in FIG. It is preferable to spot-glue both arytenoids 13 and 14 together so that the desiccant 6 is packed thinly without a groove layer.

In each of the above embodiments, the indicating agent 7 is mixed into the desiccant 6 in the form of powder or granules, so that the indicating agent 7 mixed in the desiccant 6 changes color as the desiccant 6 absorbs moisture, and is made into a transparent non-transparent material. When the desiccant 6 in contact with the air-permeable coating 14 reaches its limit of moisture absorption ability, the indicator 7 can change color and become visible from the outside.

In the present invention, the breathable film 13 and the breathable felt 23 described in the above embodiments are collectively referred to as the breathable body 3, and the non-breathable film 14, etc. are collectively referred to as the non-breathable body 4. .

In addition, the type and amount of the desiccant 6 and the roughness and number of vents in the air permeable body should be determined in order to adjust the volume of the airtight container and the humidity inside the airtight container to the desired humidity (for example, 50%) within the desired time. It is determined based on the required ventilation, the amount of food stored in the sealed container, the time the container is opened, the number of times the container is opened, etc.

Further, the cross-sectional area and length of the container body 2 are also determined depending on the shape and condition of the tableware to be stored in the airtight container.

(Effects of the Invention) Since the present invention is constructed as described above, it has the following remarkable effects.

(1) According to the present invention, it can be easily recognized from outside the container I by the discoloration of the indicator 7 that the desiccant 6 has absorbed moisture for a certain period of time and has lost its moisture absorption ability, and the desiccant 6 can be replaced. deterioration of dried food can be easily prevented.

(2. If the embodiment described in claim 2 is adopted, the entire weight of the desiccant 6 can be effectively used, and the absorption;
The container can be made small and lightweight.

(3) According to the embodiment described in claim 3, the loss of the moisture absorbing ability of the desiccant 6 can be easily recognized from the outside.

(4) By implementing the embodiment described in claim 4, it becomes convenient to plunge the tapered end 2a into food.

(5) According to the embodiment described in claim 5, the breathable body 3 and the non-breathable body 4 can be easily thermally welded, thermocompressed or bonded to the container body 2, and processing is extremely easy. This makes it easier.

(6) According to the embodiment described in claim 6, the container 1 can be easily manufactured.

(7) By implementing the embodiment described in claim 7, it is possible to avoid the trouble of specially providing the indicator 7 on the non-breathable body 4, and to facilitate the processing of the non-breathable body 1. It is.

[Brief explanation of the drawing]

1 to 3 show a moisture absorber with a moisture absorption indicator according to a first embodiment of the present invention, FIG. 1 is a perspective view of the container body, and FIG.
, b, c are explanatory diagrams showing the manufacturing stages, and Fig. 3 is Fig. 1 ll
4 and 5 show the second embodiment, FIG. 4 is a perspective view of the container body and lid, and FIG. 6 to 8 show the third embodiment, FIG. 6 and FIG. 7 are both perspective views, FIG. 8 is a cross-sectional view of FIG. A fourth embodiment is shown, and both figures are perspective views, and FIGS. 11 and 12 show a fifth embodiment, both of which are perspective views. 1... Container 2... Container body 2a... One end 2b... Opening 3... Breathable body 4... Non-breathable body 5... ... Transparent body 6 ... Desiccant 7 ... Display agent 12 ... 1:3 ... Breathable corrugated film 14 ... Non-breathable film 16 ... ... Lid 19 ... Existing 23 ... Felt / : Container ko ; Container main body + 20 D one end + 2b : Opening 3 : Breathable body q : Impermeable body j ′ Transparent body 6 , (support) Desiccant 7 ° Indicator / 2: n / 3: IIr + Transparent film Impermeable film / Otsu: So / q: Roku 23: Felt Fig. 2 (b) 0 Fig. 2 (c) 3 Figure 4 Figure 5 Figure 6 Figure 7 jfi9i Figure 12

Claims (1)

[Claims] 1. At least a part of the container (1) is formed of a breathable body (3) and a non-breathable body (4), the breathable body (3) and the non-breathable body (4) A desiccant (6) is interposed between the desiccant (6) and the desiccant (6), which is visible from the outside at the position of the non-breathable body (4) or on the non-ventilated body (4) itself, and discolors when the desiccant (6) absorbs a certain amount of moisture. A moisture absorber equipped with a moisture absorption indicator, characterized in that it is provided with an indicator (7) that indicates that the moisture absorption capacity has been lost. 2. Moisture absorption according to claim 1, characterized in that the breathable body (3) and the non-breathable body (4) are located at the farthest distance via a desiccant (6). Moisture absorber with indicator. 3. At least a part of the non-breathable body (4) is made of a transparent body (5).
) or a translucent body (5'). 2. The moisture absorber with a moisture absorption indicator according to claim 1. 4. The container body (2), which is the main part of the container (1), is made of metal or synthetic resin;
2. The moisture absorber with a moisture absorption indicator according to claim 1, wherein one end (2a) of the moisture absorption indicator is tapered or pointed. 5. Openings (2b, 2b) are provided in the container body (2), which forms the main part of the container (1), or in the container body (2) and the lid (12, 16, 19), and one opening (2b ) and the other opening (2
Moisture absorption according to claim 1, characterized in that a non-breathable material (4) such as a film or a resin film as a non-breathable coating (14) is thermally welded, thermocompressed or adhered to b). Moisture absorber with indicator. 6. The moisture absorber with a moisture absorption indicator according to claim 1, wherein the container (1) is entirely formed of a breathable coating (13) and a non-breathable coating (14). 7. The moisture absorption indicator according to claim 1, wherein the indicator (7) is mixed in the desiccant (6) in the form of powder or granules so that it can be visually recognized from the outside of the non-breathable body (4). Moisture absorber with agent.