JPH0446231Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a time-lapse indicator that is most suitable for indicating the effective period of use of insect repellents, deodorizers, fragrances, deodorants, etc.

[Conventional technology]

For products that do not show any visible change over time, such as deodorizers made of activated carbon used in household refrigerators, etc., or sublimation insect repellents stored in breathable containers, etc. There are concerns about determining when the effective period of use (approximately 6 months) will end. Therefore, in the past, measures have been taken such as writing the start date and time of use on a part of the casing before use.

However, in actual use, it is easy to forget to check the expiration date, and especially if you neglect to write down the date and time, you will not know when to do the next exchange, which is extremely worrying. .

By the way, in general, as a simple means of displaying the date and time that has passed over a relatively long period of time, conventional methods have been based on the pH value caused by discoloration of the oxidation dye filled in the container or decomposition of the drug.
Indicators using changes, etc. were used.

[Problem that the invention attempts to solve]

However, since the indicator using the above-mentioned scientific changes has a long display period, the oxidation or decomposition rate is extremely slow, so it is not clear that the indicator changes due to discoloration of the drug, etc. Moreover, the degree of discoloration must be judged intuitively, and especially in the display end area, the intermediate state of discoloration may last for a relatively long period of time, and the final state, such as the period of the highest concentration of change, must be judged intuitively. It was difficult to confirm the status, and as a result, the period display was inaccurate. In addition, these conventional indicators have problems such as bulkiness of the container, restrictions on the posture of the container during use, and high cost.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a time indicator that can display the period more clearly and is inexpensive and easy to use.

[Means for solving problems]

In order to achieve this purpose, the present invention uses a display material colored in a different color with a sublimable dye, which is partially or completely enclosed in a transparent gas-impermeable bag, and a We propose an aging indicator consisting of an adsorbent placed in the container.

In addition, when coloring the display material, the non-sublimable dye and the sublimable dye of different colors may be sequentially applied or mixed, or the sublimable dye of different colors may be applied to a color board or sheet. It is effective by using means.

In addition to thick cardboard, the adsorbent may be a gas-permeable bag filled with a substance such as activated carbon, silica gel, clay, acid clay, or zeolite.

[Effect]

According to the above means, in the sublimable dye coated display material sealed in the gas-impermeable container, sublimation of the dye is suppressed after the dye vapor pressure in the container reaches a predetermined pressure. It is kept stable.

In use, the bag is once opened, the adsorbent is put into the bag, and the bag is sealed again.

In this state, the inside of the gas-impermeable container can be visually recognized through its transparent portion.

Then, inside the bag, the sublimated vapor of the sublimable dye in the display material is transferred to the adsorbent surface inside the bag, and the surface is colored with the dye color.

The sublimation phenomenon of the dye inside the container progresses in balance with the internal vapor pressure, and therefore progresses as the internal vapor is adsorbed onto the adsorbent surface.

Therefore, the color change of the adsorbent due to dye adsorption to the adsorbent or the state of the display material due to sublimation of the dye can be observed from the see-through part of the bag, with the time when the adsorbent is introduced into the bag as the time-lapse start point. By comparing and visually recognizing the two bodies, it is possible to determine the elapsed date and time.

Next, illustrated embodiments of the present invention will be described.

〔Example〕

Fig. 1 is a configuration diagram showing an embodiment of the present invention, and Fig. 2 is a diagram showing its usage state. A chuck-shaped seal portion 2 that can be opened and closed is formed, and inside the bag 1 is a sublimable dye (manufactured by Hodogaya Chemical Co., Ltd.,
A sublimable dye display material 3 composed of a core material coated with color former MT-Z) is housed. In this case, the display material 3 is colored by using a thick board made by laminating and pressing cardboard or non-woven fabric/filter paper, or a thin sheet of Japanese paper, non-woven fabric, cloth, etc. as a core material, and applying different colors to the surface thereof. The non-sublimable dye and the sublimable dye may be applied sequentially or as a mixture, or the sublimable dye of a different color may be applied to a color board or sheet.

On the other hand, an adsorbent 4 filled with a material such as activated carbon, silica gel, clay, acid clay, or zeolite in a transparent gas-permeable bag 6 is packaged in an impermeable bag 5. Note that as the simple adsorbent 4, thick cardboard or the like whose surface is finished in white may be used.

Therefore, when using it, open the bag 5 and
When the adsorbent material 4 is taken out from the bag 5, put into the container bag 1 through the opening of the seal part 2, and the seal part 2 is sealed again and placed in the state shown in the second figure, the adsorbent material 4 The sublimation of the dye from the display material 3 is activated under the reduced vapor pressure due to the absorption of the sublimable dye into the display material.

Therefore, under the balance of internal vapor pressure based on the absorption of the sublimable dye into the adsorbent 4 and the sublimation of the dye from the display material 3, the dye transfer from the display material 3 to the adsorbent 4 occurs over time. progresses gradually.

Due to this dye transfer, the adsorbent 4 is gradually colored until the color tone becomes equal to that of the sublimable dye, or
This embodiment displays the elapsed date and time by setting the end point as the time when the display material 3 changes to a non-sublimable dye color or fabric color (including colorless and transparent) due to volatilization of the sublimable dye. It can be used as an indicator.

In the above embodiment, it is also possible to construct the container bag 1 and the bag 5 into a continuous body that can be easily separated by perforations or the like.

[Effect of idea]

As described above, according to the indicator of the present invention, the sublimable dye applied to the display material in the gas-impermeable container is absorbed and transferred to the adsorbent material.
As a result, it is possible to estimate the elapsed date and time based on the color density of the adsorbent or the discoloration of the display material to a non-sublimable dye color or fabric color due to volatilization of the sublimable dye. This can be easily and reliably determined by comparing the color change between the display material and the adsorbent placed side by side in the bag, so for example, the final time is the point at which the color changes between the display material and the adsorbent. In addition to being able to demonstrate the aging determination function, this aging period can be adjusted from 1 week to 6 days by adjusting the absorption capacity by adjusting the amount of sublimable dye applied in the display material or the adsorption area or amount of the adsorbent. It can be freely selected within a range of about 10 months, and it functions stably regardless of the container posture during use, so it can be pasted on the side of a container such as a deodorizer that is subject to aging. The indicator of the present invention is extremely useful in practice as a device for determining elapsed time, as it can be easily used, such as when worn together, and can be provided at a low cost due to its simple structure.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the indicator of the present invention, and FIG. 2 is a diagram showing its usage state. 1...Container bag, 2...Seal part, 3...Sublimable dye display material, 4...Adsorbent material, 5...Moisture-proof bag, 6
...Gas-permeable bag that can be seen through.

Claims (1)

[Claims for Utility Model Registration] (1) A display material colored in a different color with a sublimable dye, which is partially or completely sealed in a transparent gas-impermeable bag, and A time indicator characterized by comprising an adsorbent placed in a container. (2) The aging indicator according to claim 1, wherein the coloring material is a thick board made of cardboard, nonwoven fabric, filter paper, etc. laminated and pressed. (3) The aging indicator according to claim 1, wherein the coloring material is a thin sheet made of Japanese paper, nonwoven fabric, cloth, etc. (4) The scope of claims for utility model registration, where the display material is colored by sequentially applying or mixing a non-sublimable dye and a sublimable dye to the surface of the board or sheet as a core material. The aging indicator described in paragraph 1. (5) The aging indicator according to claim 1, wherein the display material is a colored board or sheet of a different color, the surface of which is coated with the sublimable dye. (6) The aging indicator according to claim 1, wherein the adsorbent is a granular material such as activated carbon, silica gel, clay, acid clay, or zeolite packed in a permeable bag.