JPS59115251A - Method of indicating residual quantity of liquid in thin vessel for drink - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for indicating the amount of liquid remaining in a thin-walled beverage container.

Conventionally, most beverage containers were around 350 ml and were usually consumed within a very short time after opening. However, in recent years, ever since mini # beer containers have been sold and have been well received, there has been a trend toward larger containers. Such containers are left on a table for drinking after opening, but if an opaque container such as a can is used, the contents cannot be seen.
It was somewhat inconvenient that I couldn't see the contents of the dog-shaped beer can that was placed on the table while I was drinking.

The present invention was made as a result of extensive research into methods for indirectly determining the amount of liquid remaining in such opaque containers, particularly in the can body, by providing a method for indirectly determining the amount of liquid remaining in the can with the naked eye.
A temperature-indicating side slope having a color change area near the drinking temperature of the beverage is attached, and due to the color change of this temperature-indicating material, the temperature of the container stored in the container differs from the temperature of the atmosphere in which the container is placed. It is characterized by indicating the liquid level of the beverage.

Hereinafter, the present invention will be described in more detail, particularly when applied to beer.

Beverages generally have a drinking temperature, and the beverage is stored at this temperature in preparation for drinking, or is cooled or warmed to this temperature before drinking. In the case of beer,
The temperature is usually 5 to 8 degrees Celsius. If we consider the case of drinking a portion of container-type beer that has been chilled in a suitable cooling means such as a refrigerator, the remaining peel at the bottom of the container will have a temperature lower than the ambient temperature, that is, room temperature, because it has been cooled. It is in. On the other hand, as more beer is drunk, more air enters the container, forming a gas phase at the top of the container. Although this gas phase is affected by the cold residual beer, its temperature is close to the ambient temperature.

In this way, the side of the container below the liquid level of the remaining beer is exposed to a lower temperature due to the remaining beer, and the heat capacity of the beer is large, while the side above the liquid level is exposed to a much higher temperature. Totoru. It has been found that this temperature gap is transmitted through the thin-walled container in the thickness direction and appears on the outer peripheral surface of the container. In order to express the temperature gap inside the container as faithfully as possible as the temperature on the outer surface of the container, it is best to make the container from a thermally conductive material such as metal.In particular, aluminum is thermally conductive and requires thin wall processing. Excellent in terms of sex.

1t aluminum beer can (can body wall thickness 0.1~0.2 El)
) was cooled to approximately 8°C, opened, and poured out about half of the volume, placed on a cork mat, and left to stand at room temperature (23-24°C). ). After standing still, measure the surface temperature at 1 cm intervals from the bottom of the can using a thermometer (manufactured by Kakuden, Type 2578-30).
) was measured over time (every 10 minutes). In addition, 2L mini barrel beer (made of aluminum, can body wall thickness 0.1-0.2 rtrm)
) The surface temperature was measured in the same manner except that the second
The figure shows a partial cross-sectional schematic diagram. ).

These results are shown in Tables 1 and 2, respectively. After 10 minutes, 30
FIG. 3 shows the relationship between the height from the bottom and the surface temperature after 60 minutes and after 60 minutes.

From the above results, if a temperature-indicating material that has a discoloration range in the temperature range of 5 to 15 degrees Celsius and is sensitive to temperature differences of 2 to 3 degrees Celsius is applied or attached to the beer can body in advance, canned beer can be It can be seen that the remaining liquid amount can be indicated in a range of 2 crn.

The temperature-indicating material is one that shows a change in color depending on the temperature, and has a color change range near the drinking temperature of the contents of the container. A material having a discoloration range within a temperature range of ~15°C is used. The discoloration sensitivity is sufficient if a temperature difference of 2 to 3° C. can be detected.

Temperature-indicating materials include colored ← other color-changing materials,
Any material that appeals to the visual sense may be used, such as one that changes from colored to achromatic (typically white) or one that changes in transparency (typically transparent to opaque). As such temperature-indicating materials, a single material, a composite material, or a liquid crystal material can be used.
The temperature-indicating material shown in the publication is exemplified.

The temperature-indicating material may be attached to the container by any method such as painting or pasting that can convey the temperature of the outer peripheral surface of the container to the temperature-indicating material.

When painting, it may be applied as is or together with a binder; when pasting, a sheet material such as an aluminum sheet coated with a temperature-indicating material may be applied in advance or upon drinking.

The temperature-indicating material may be applied to the entire container, or may be provided partially in stripes in the height direction of the container.

In addition, in consideration of variations in velcro reduction for drinking and changes in liquid temperature due to the length of time the liquid is left for drinking, a plurality of temperature-indicating materials having different color change ranges can be used together. for example,
Considering the case of beer, predictions can be made by combining a temperature-indicating material with a color change range between 5 and 8 degrees Celsius, a temperature-indicating material with a color change range between 8 and 11 degrees Celsius, and a temperature-indicating material with a color change range between 12 and 15 degrees Celsius. It is possible to cover almost the entire acreage reduction area. In this case, each temperature-indicating material is
For example, it may be attached to the container in the form of vertical stripes, or a mixture of a plurality of temperature-indicating materials may be painted.

FIG. 4 is a side view showing an embodiment of the beverage container used in the present invention, in which a temperature-indicating material 13 is attached to the outer circumferential surface of the container 11. It is also possible to create a design effect by painting the temperature-indicating material with letters, patterns, etc.

The above description has focused on the case where the amount of remaining liquid in a beer container is indicated, but the present invention is not limited to this, and the present invention is not limited to this.
Any type can be used as long as the temperature (liquid temperature) and pig enclosure temperature (room temperature) are different. Preferred applications include beverage containers for cooling and drinking, particularly aluminum canned beer containers.

[Brief explanation of drawings]

FIGS. 1 and 2 are schematic partial cross-sectional views showing the situation when the surface temperature of a beer container containing about half beer is measured. FIG. 3 is a graph showing the relationship between height from the bottom of the beer can and temperature. FIG. 4 is a perspective view showing an embodiment of a beverage container used in the present invention. 11...Thin-walled 8 vessels 13...Temperature-indicating material

Claims (1)

[Claims] 1. A temperature-indicating material having a color change range in a temperature range near the drinking temperature of the beverage is attached to the outer peripheral surface of a thin-walled beverage container, and the color change of the temperature-indicating material causes the above-mentioned container to be stored in the container. A method for indicating the amount of remaining liquid in a thin-walled beverage container, characterized by indicating the liquid level of the beverage having a temperature different from the temperature of the atmosphere in which the container is heated.