JPH10239172A - Upper-limit temperature monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for operation energy and to miniaturize a monitoring device without limit in effective time, by forming the device by holding a plurality of types of materials with different colors that are melted at a specified temperature lower than a heat-melting temperature of a retention plate and a protection film between the retention plate with a high heat-melting temperature and a transparent protection film. SOLUTION: The transparent protection film 1 is formed out of a synthetic resin such as polypropylene with a high heat-melting temperature, and is a substance that cannot be melted even at a temperature higher than a control tolerance upper-limit temperature, and may always maintain a transparent state. A solid paraffin thin 3 is a thin film with the same material as and different color from that of the thin film 2 and is pigmented, for example, in red. The color of the thin films 2 and 3 may be a combination of colors that are extremely different from those of the thin film 2 due to the mixture of the melting and liquidation of the both. The thin film 2 is overlapped on the thin film 3 and is pinched between a retention plate 4 and the protection film 1, and the surrounding of the protection film 1 and the retention plate 4 is adhered and enclosed. Therefore, even if the thin films 2 and 3 reaching a control tolerance upper-limit temperature are melted, they do not flow out between the protection film 1 and the retention plate 4, thus preventing deterioration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to blood, pharmaceuticals,
The present invention relates to an upper limit temperature monitoring device that monitors whether or not food is exposed to a predetermined temperature or higher during storage and distribution.

[0002]

2. Description of the Related Art Temperature history management during storage, distribution, and the like of blood, medicines, foods, and the like is very important for quality maintenance. For example, stored transfusion blood is denatured or lysed when exposed to high temperatures during transport. However, changes in blood quality cannot be confirmed from the appearance of the blood bag, leading to a medical accident. The same can happen in various fields, such as pharmaceuticals and foods. As described above, the management of the temperature history is important, and particularly, whether or not the object has exceeded the upper limit temperature is the most important concern.
Meanwhile, for temperature history management during the storage or distribution process of blood, medicines, foods, and the like, conventionally, a thermometer capable of recording or storing data is packed together with an object, and the data is verified at a necessary time thereafter.

[0003]

The verification of the temperature history by the above-mentioned thermometer is based on the length of the recording paper, the data storage capacity,
The measurement time is limited due to the battery life and the like. In addition, each of these temperature measuring devices has a complicated mechanism,
Due to the large size, it is not possible, for example, to attach each individual pharmaceutical package.

SUMMARY OF THE INVENTION An object of the present invention is to provide a compact upper limit temperature monitoring device that does not require operating energy, has no limit on the effective time, and has a small lifetime.

[0005]

According to the present invention, there is provided an apparatus for monitoring an upper limit temperature between a holding plate having a high heat melting temperature and a transparent protective film having a high heat melting temperature. Two different-color materials 2, which melt at a predetermined temperature lower than the melting temperature,
3 is formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an upper limit temperature monitoring device according to the present invention will be described with reference to FIGS.

[0007] The upper limit temperature monitoring device is a transparent protective film 1
, A solid paraffin thin film 2, a solid paraffin thin film 3 having a different color from the solid paraffin thin film 2, and a holding plate 4.

The transparent protective film 1 is formed of a synthetic resin such as polypropylene having a high heat melting temperature, and is a substance which does not melt even at a temperature somewhat higher than the allowable upper limit temperature for management.
Any material can be used as long as it can always maintain a transparent state.

The solid paraffin thin film 2 is a thin film of solid paraffin (C _n H _{2n + 2} ), for example, is colored white, melts at a target upper limit temperature of 45 to 65 ° C., and becomes liquid. It becomes. The melting temperature can be set by changing the mixing ratio of various paraffins having different carbon numbers (the higher the melting point, the higher the melting point).

The solid paraffin thin film 3 is a thin film of the same material and different color as the solid paraffin thin film 2, and is colored red, for example. The color of the solid paraffin thin films 2 and 3 is not limited to white and red as long as the color of the solid paraffin thin film 2 is extremely different from the color of the solid paraffin thin film 2 by melting and liquefaction. .

The holding plate 4 is made of a material such as a synthetic resin or metal having a high heat melting temperature, and may be any material that does not melt at a temperature somewhat higher than the allowable management upper limit temperature. Then, an adhesive material with a release sheet may be applied to the back surface of the holding plate 4 for convenience of attachment to the temperature history management target.

A solid paraffin thin film 2 is sandwiched between the holding plate 4 and the transparent protective film 1 so as to overlap the solid paraffin thin film 3, and the periphery of the transparent protective film 1 and the holding plate 4 are brought into close contact with each other. Enclosed. Therefore, even if the solid paraffin thin films 2 and 3 are melted at a temperature equal to or higher than the control allowable upper limit temperature, they do not flow out from between the transparent protective film 1 and the holding plate 4. Further, since the solid paraffin thin films 2 and 3 are not dissolved in water, they do not deteriorate even if moisture enters between the transparent protective film 1 and the holding plate 4 during transportation or management.

In the upper limit temperature monitoring device having such a configuration, the color of the solid paraffin thin film 2, that is, the color is white, as shown in FIG. However, when the temperature becomes equal to or higher than the allowable temperature limit, the solid paraffin thin films 2 and 3 melt and mix with each other, and the color of the solid paraffin thin films changes to a color different from white in appearance. This change, once occurring, is irreversible and remains red as the temperature drops back to solid paraffin.

[0014]

Since the present invention is configured as described above, it has the following effects.

That is, no operating energy such as electric power is required, the effective time is semi-permanent, and the size can be reduced. Therefore, it is packed together with the temperature history management object,
Alternatively, it is possible to obtain important information for maintaining the quality as to whether or not the object has been exposed to the management allowable upper limit temperature at the time of attachment, storage or distribution process. The information is irreversible and cannot be modified by a third party and can be retained permanently. Further, since the information can be visually checked, the quality status of the temperature history management target can be easily grasped. In addition, batteries,
There is no need to replace or maintain recording paper. Especially,
By being small, it can be attached and arranged for each small packing form or for each target part, so that fine temperature control can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram of an upper limit temperature monitoring device of the present invention;
(1) is a perspective view showing the stacking order of each component, and (2) is a plan view.

FIG. 2 is a plan view showing changes when the upper limit temperature monitoring device of the present invention is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent protective film 2 Solid paraffin thin film 3 Solid paraffin thin film 4 Holding plate

Claims (1)

[Claims] 1. A two-color material which is melted at a predetermined temperature lower than the heat melting temperature of the holding plate or the protective film between a holding plate having a high heat melting temperature and a transparent protective film having a high heat melting temperature. An upper limit temperature monitoring device formed between the two.