JP2003315168A - Thawing indicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein there is no conventional means to facilitate a determination of whether frozen food has thawed in storage or in transportation and refrozen or not, to make it difficult to control quality of the frozen food and assure that it has not thawed on the way. <P>SOLUTION: A platelike thawing indicator, wherein on a colored and frozen platelike material, differently colored ribbonlike materials are placed, which are both integrally sealed in transparent sealing materials, is attached to frozen food. If thawing starts with increasing temperature, the colors change naturally as the shapes change. Even refreezing can not recover the changes. The materials are sufficient for a determination of whether there is a history of thawing by a temperature rise or not to form a means for quality control of the frozen food. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to means for determining whether or not a product has melted at a temperature exceeding a specific environmental temperature during storage or transportation of the product.

[0002]

2. Description of the Related Art Conventionally, there has been only means for indirectly measuring the environmental temperature change of a product by a recorder to know whether or not the melting temperature has been reached. In addition, it was not possible to determine whether or not it was re-solidified after melting.

[0003]

Conventionally, it is determined whether a frozen product or a refrigerated product melts during storage or during transportation and is frozen again, or whether the temperature rises and exceeds a specific temperature. There was no effective and simple means to determine,
Therefore, it is difficult to control and guarantee the quality of all frozen products or refrigerated products.

In addition, during storage or transportation at room temperature or higher, the product exceeds a specific high temperature, melts, and then melts, or once again condenses, or the temperature rises to a specific value. There was no means to determine whether the temperature was exceeded, and it was difficult to control and guarantee the quality of the product.

[0005]

In order to achieve the above object, in the present invention, a ribbon-shaped material (1) which is colored and melts at a specific temperature, and a plate-shaped material which is colored in a different color, or A plate-like material (2) that is colored with different colors and melts at a specific temperature is adhered and integrated.

The ribbon-shaped material (1) and the plate-shaped material (2) are
One or both of them melted, became fluid, and the color diffused, mixed colors, changed the color, or changed the initial shape so that it was possible to determine that the melted.

The ribbon-shaped material (1) and the plate-shaped material (2) are sealed with a transparent sealing material (3) so that they will not scatter when melted.

As a method of setting a specific temperature, a solvent and a solute are selected. Further, the solidification or melting temperature is selected by changing the concentrations of both or one of them.

When selecting the color to be colored, it is better to select a color in which the difference between the ribbon-shaped material (1) and the plate-shaped material (2) when they are melted and the color before mixing are easy to understand.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on examples with reference to the drawings. In FIG. 1, an overall view when combined is shown. On the upper surface of the plate-like material (2) frozen by containing water colored in a thin sheet-like substance having a high water content, a thin ribbon-like substance having a high water content,
Place the ribbon-shaped material (1) frozen by containing water colored in different colors, sandwich it with the transparent encapsulating material (3) from above and below, seal, and dry or melt. It has a structure that does not scatter.

In FIG. 2a, a wax-like or jelly-like substance that condenses at room temperature is colored, and a wax-like or jelly-like substance that condenses at room temperature is placed on a plate-shaped material (4) that is formed into a book. The structure in which the colored material (5) formed into a disc shape is arranged is shown.

In FIG. 2b, the state before melting is shown in FIG.
a starts to partially melt from the vicinity of the arrow (6), the plate-shaped material (4) and the disk-shaped material (5) are mixed, and diffuse into each other to become a mixed color state. Show the process of going. At this time, the disk-shaped shape disappears.

The temperature at which melting occurs varies depending on the concentrations of the solvent, solute and dye constituting each material. Therefore, the concentration is appropriately set and controlled, and the specific melting temperature is determined.

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

As described above, when the melting display device is attached to a product requiring temperature control, when the melting material melts and its shape changes or color mixing occurs, the color changes. , It becomes a material that can determine whether the product has melted outside the specified temperature range. The products that require temperature control can be stored or the temperature can be controlled during transfer, and the quality and guarantee of the products will be more reliable. Of course, this melting indicator is an irreversible process and cannot be tampered with. This is where we can earn a great deal of trust from our customers.

[Brief description of drawings]

FIG. 1a is an overall perspective view showing a basic configuration.

FIG. 1b is a sectional view of the basic configuration.

FIG. 2a is an overall perspective view of a configuration example different from FIG. 1a.

FIG. 2b is an overall perspective view showing the melting indicator of FIG. 2a partially melted.

[Explanation of symbols]

1, ribbon material 2, plate material 3, transparent encapsulant 4, plate material 5. Disc-shaped material 6, the site where partial melting started

Claims (3)

[Claims] 1. A plate material colored with a different color, or a plate material colored with a different color, which is brought into close contact with or in close proximity to a colored melting ribbon-shaped material (1) which melts at a specific temperature. , A melting indicator comprising a plate-like material (2) which melts at a specific temperature. 2. The fusion display device according to claim 1, which is sealed with a transparent sealing material (3). 3. Concentration of solute and solvent of a colored and melting ribbon-shaped material (1) which melts at a specific temperature and a plate-shaped material (2) which is colored with a different color and melts at a specific temperature. The melting indicator according to claim 1, wherein is selected to specify the melting temperature.