JP7128028B2 - temperature sensitive label - Google Patents

Description

The present invention relates to a temperature-sensitive label, more specifically, to a temperature-sensitive label that is attached to a desired location of various devices requiring temperature control, and irreversibly displays the fact by developing color when a set temperature is reached. be.

An opaque masking material consisting mainly of straight-chain hydrocarbon wax that melts at a preset temperature and various chemical substances is superimposed on colored paper (irogami), and when the set temperature is exceeded, the wax and Using the melting phenomenon of chemical substances, the colored surface of the colored paper, which was previously hidden from the outside, can be seen through the temperature-sensitive label. Therefore, it is widely used in many industrial fields.

Japanese Patent No. 4789083 JP-A-2001-83020 JP-A-2003-172661 JP-A-10-232172 Japanese Utility Model Laid-Open No. 58-71134

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As shown in the above documents, many temperature-sensitive labels that utilize the melting phenomenon of wax and various chemical substances due to heat have been proposed and are widely used in various industrial fields, but they cause uneven coloring, Due to improper handling, it may appear as if color develops even though the set temperature has not been exceeded, which has sometimes hindered accurate temperature control.
In other words, due to manufacturing defects or improper handling, partial incomplete coloring 7 as shown in FIG. When the mark 8 or the dent 9 as shown in FIG. 3 appears, the observer misunderstands that it is normal color development and judges that the set temperature has been exceeded.

If the location where the temperature-sensitive label is attached is very close to the observer, it is possible to relatively accurately determine whether the color is normal or not. In some cases, it is necessary to check the color development of the warm label, and under such circumstances, it is very difficult to distinguish the cases shown in FIGS. 1 to 3 from normal color development.

Temperature-sensitive labels are often used on power lines and railway facilities, but in these cases, the location where they are attached is usually several meters or more above the monitoring position, and dozens of labels are required during inspection work. It was quite difficult even for a skilled person to quickly and accurately check the color development status of hundreds of temperature-sensitive labels sequentially from a distant position.

As a result of intensive research to solve the above-mentioned problems of temperature-sensitive labels, the inventors of the present invention have found that it is possible to accurately and quickly know whether the color is normal or not, even from a distance, while being able to manufacture at low cost. We have successfully developed a convenient temperature-sensitive label, which is proposed here as the present invention.

Using the melting phenomenon of waxes mainly composed of hydrocarbons and various chemical substances that melt with heat, a strip-shaped feeling that irreversibly displays the fact that the set temperature is exceeded by coloring when the set temperature is exceeded. In a temperature-sensitive label provided with a band-shaped colored portion having the same hue as when the color is developed by exceeding a set temperature on the side edge of the surface side of the thermal label, the colored portion is formed by preheating with a hot press, The above problems have been solved.

Like conventional temperature-sensitive labels, it is used by attaching it to a desired location on a device that requires temperature control. , merge together to form liquid wax or chemical substances, and due to this phase change, the previously opaque masking material turns transparent, allowing the colored surface of the colored paper below to become transparent. Then, it becomes colored state, and this makes it possible to know the fact that the set temperature is exceeded.

At this time, on the side edge on the surface side of this temperature-sensitive label, a colored portion having the same hue as the colored surface of the colored paper is formed. In the case of dents, the hue is different from the normal color development, and the color depth (saturation) is also different. It is possible to easily confirm whether or not the coloring is normal, and it is possible to perform the confirmation work more accurately.

In particular, when confirmation work must be performed from a remote location, such as power lines and various railway facilities, where it is impossible to approach, it is very difficult to determine whether or not the coloring is normal by comparing with the colored portion 6. It is effective, and since it is only necessary to form a colored portion on the surface of the temperature-sensitive label by pre-heating it with a hot press , it can be manufactured at a low cost, yet it is accurate and quick for identification work from a remote location. It has the effect of realizing a dramatic improvement in work efficiency.

FIG. 3 is a perspective view of an example of a temperature-sensitive label with incomplete coloring 7; FIG. 2 is a perspective view of an example of a temperature-sensitive label with scratches 8 due to improper handling or the like; FIG. 4 is a perspective view of an example of a temperature-sensitive label with dents 9 caused by improper handling or the like; 1 is a perspective view of one embodiment of a temperature-sensitive label according to the present invention; FIG. FIG. 5 is an enlarged cross-sectional view taken along line AA in FIG. 4; FIG. 2 is a partially enlarged cross-sectional view of one embodiment of the temperature-sensitive label according to the present invention, drawn with a part cut away;

The most distinctive feature is that a band-shaped colored portion having the same hue as that of the normally developed color is formed in advance by pre-heating with a hot press on the side edge of the surface side of the strip-shaped temperature-sensitive label.

4 is a perspective view of a temperature-sensitive label according to the present invention, FIG. 5 is an enlarged cross-sectional view taken along the line AA in FIG. 4, and a partially enlarged cross-sectional view with a part cut away.
In the figure, reference numeral 1 denotes a strip-shaped substrate, and as shown in FIG. 6, colored paper 2 is pasted on this substrate 1 with the colored surface 3 facing upward, that is, toward the surface side. On the coloring surface 3 of this colored paper 2, a wax mixture obtained by kneading powdered wax mainly composed of straight-chain hydrocarbons melting at an arbitrary temperature set in advance, a sticky agent, and a solvent is applied. An opaque masking material 4 consisting of is applied, and a transparent film 5 is covered thereon.

The above configuration is basically the same as the conventional temperature-sensitive label disclosed in Patent Document 1 and the like.
Also, instead of waxes mainly composed of linear hydrocarbons, chemical substances that melt at a specific temperature, such as trilaurin, myristic acid, behenic acid, and stearic acid amide, may be used.

Further, as shown in FIG. 4, a colored portion 6 having the same hue as the colored surface 3 of the colored paper 2 is formed on the side edge of the temperature- sensitive label.
It is essential that this colored portion 6 has the same hue as when this temperature-sensitive label normally develops color due to an excess of the set temperature. , and only this portion is colored in advance to form a strip-shaped colored member 6. - 特許庁
In this embodiment, the colored portion 6 is formed only on one side edge, but it may be formed on a pair of opposite side edges or other side edges.

This embodiment has the structure described above, and is used by attaching it to a desired location of a device requiring temperature control in the same manner as a conventional temperature-sensitive label. The powdered waxes and chemicals in the material 4 melt and agglomerate into liquid waxes and chemicals. This phase change causes the masking material, which was previously opaque, to become transparent. The coloring surface 3 of the colored paper 2 positioned below is seen through and becomes colored, thereby making it possible to know the fact that the set temperature is exceeded.

At this time, a colored portion 6 having the same hue as that of the colored surface 3 of the colored paper 2 is formed on the side edge on the surface side of the temperature-sensitive label, and an incomplete coloring 7 shown in FIGS. 1 to 3 is formed. In the case of rubbing marks 8 and dents 9, the hue is different from the normal coloring, and the color depth (saturation) is also different. By comparing, it is possible to easily confirm whether or not the coloring is normal due to exceeding the set temperature. In particular, since the colored portion 6 is formed by pre-heating by hot pressing, the hue of the colored portion 6 is exactly the same as the hue during normal color development, and the confirmation work by comparing the hue is reliable and accurate. can be done

In particular, when confirmation work must be performed from a remote location such as a power line or various railway facilities that cannot be approached, it is very difficult to determine whether or not the coloring is normal by comparing with the colored portion 6. Since the colored portion 6 is only formed by pre-heating the temperature-sensitive label with a hot press , it can be manufactured at a low cost, yet it can be accurately and quickly identified from a remote location. It has the effect of realizing a dramatic improvement in work efficiency.

It can be used in all fields that require temperature control, including the electric power industry, rail transportation industry, and food manufacturing industry.

1. Substrate 2 . Colored paper (Irogami)
3. Colored surface 4 . Masking material 5 . transparent film 6 . Colored part 7 . Incomplete coloring 8 . Scratches 9 . dent

Claims (1)

Using the melting phenomenon of waxes mainly composed of hydrocarbons and various chemical substances that melt with heat, a strip-shaped feeling that irreversibly displays the fact that the set temperature is exceeded by coloring when the set temperature is exceeded. A temperature-sensitive label provided with a band-shaped colored portion having the same hue as when the color is developed by exceeding a set temperature on the side edge of the surface side of the temperature-sensitive label , wherein the formation of the colored portion is performed by preheating with a hot press. A temperature-sensitive label characterized by being

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