JPH0743714U - Thermosensitive coloring adhesive label with water repellency - Google Patents

Abstract

(57) [Summary] [Purpose] For example, when it is used as a price tag label attached to perishable foods containing moisture, etc., the color changes due to the moisture, so there is a limitation in use. By removing the drawback, a label with thermosensitive color development,
It is intended to provide a label that can be attached and used even in a place or object where the environment changes drastically and is humid or humid. In this thermosensitive color-developing adhesive label having water repellency, a pressure-sensitive adhesive layer 2 is formed on the back surface of a label substrate 1, and a thermosensitive color agent layer 3 is formed on the surface of the label substrate 1. In the pressure-sensitive adhesive label described above, a protective coating layer 4 formed by applying a water-repellent substance containing at least wax to the surface of the heat-sensitive color developing agent layer 3 is formed, .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thermosensitive coloring adhesive label having water repellency.

[0002]

[Prior art]

 The thermosensitive recording paper currently in use is made of a material that has a coloring function and does not have weather resistance to moisture, and the existing thermosensitive recording paper is used for business records and is stored in a room with little change in environment. Currently, it is used only for such purposes.

[0003]

[Problems to be solved by the device]

 Therefore, when such a thermosensitive color recording paper is used as a label, for example, when it is used as a price tag label attached to perishable food containing moisture, etc., the color will change due to the moisture. Therefore, there is a limitation in use, and it has not yet been put to practical use.

[0004] Therefore, the present invention eliminates these drawbacks, and a label having a thermosensitive coloring property can be used by sticking it to a place or an object where the environment is drastically changed and there is moisture or humidity. It is intended to be provided.

[0005]

[Means for Solving the Problems]

 This invention relates to a pressure-sensitive adhesive label formed by forming a pressure-sensitive adhesive layer on the back surface of a label base material and forming a thermosensitive color developing agent layer on the surface of the label base material, wherein at least a wax is formed on the surface of the thermosensitive color developing agent layer. A heat-sensitive, color-sensitive adhesive label having water repellency, characterized in that a protective coating layer formed by applying a substance having water repellency including is formed.

[0006]

[Action]

 A protective coating layer is formed by coating a material having water repellency on the surface of the thermosensitive color developing agent layer formed on one main surface of the label substrate, so that the protective coating layer prevents moisture and moisture from being applied. , Repels water without reaching the thermosensitive color developer layer.

[0007]

[Effect of device]

 According to this invention, a thermosensitive color former layer is formed on one main surface of the label substrate, and a water-repellent substance is applied to the surface of the thermosensitive color former layer to form a protective coating layer. Therefore, the label is affixed because the liquid etc., which is not affected by moisture and humidity, and in which the substance that deteriorates the thermosensitive coloring agent is dissolved, does not contact the thermosensitive coloring agent and deteriorate the thermosensitive coloring agent. Regardless of the nature of the adherend, it can be used as a label for various products, which is extremely convenient.

The above-mentioned object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0009]

【Example】

 FIG. 1 is a sectional view of an embodiment of the present invention. FIG. 2 is a side view showing a method of using the first embodiment shown in FIG.

Reference numeral 1 denotes a label base material made of paper, synthetic paper, a synthetic resin sheet or a film, and an adhesive layer 2 formed by applying a pressure-sensitive adhesive on the back surface of the label base material 1. Is being formed. On the surface of the label substrate 1, a heat-sensitive color former layer 3 is formed, which is formed by coating a heat-sensitive color former composed of a substance or the like that comes into contact with another compound and develops a color when heated. ing. On the surface of the heat-sensitive color former layer 3, a water-repellent substance containing wax, fatty acid derivative, synthetic resin, chromium complex salt or the like as its main component is further coated to form a protective coating layer 4. It is necessary that the thickness of the protective coating layer 4 be such that heating of the thermal head or the like does not interfere with the thermosensitive coloring effect of the thermosensitive coloring agent layer 3.

In this embodiment, the release sheet 5 for protecting the pressure-sensitive adhesive layer 2 on the back surface of the label substrate 1 is temporarily attached to the surface of the pressure-sensitive adhesive layer 2, and therefore, A plurality of label base materials 1 are supported on the surface of the release sheet 5. The release sheet 5 is selected by applying a release agent such as a silicone resin to the surface of paper, processed paper, polyester, polyethylene, polypropylene, etc. in order to make the label substrate 1 easier to peel off from the release sheet 5. To be done.

As the water-repellent substance, the following substances are selected. The wax-based emulsion type coating method may be applied by roll coating or calendar coating, and dried by heating to form the protective coating layer 4. A polycondensation resin, a fatty acid derivative and a wax or a thermosetting resin, an emulsion type of which contains an aliphatic amide derivative as a main component. For example, the protective coating layer 4 is formed by calendering or spray coating it. You can do it. The protective coating layer 4 may be formed of a substance having water repellency, such as paraffin, metal soap, polyethylene, or wax, which is blended with the material, for example, by calendering, spraying, or roll coating. A method in which the protective coating layer 4 is formed by a water-repellent substance containing a synthetic resin, a wax, a nonionic and anionic activator as a main component, for example, by spraying or roll coating.

The thermosensitive color-developing pressure-sensitive adhesive label is, for example, as shown in FIG. 2, wound in a roll shape and mounted on a label printing and sticking machine, and from the surface of the protective coating layer 4 side to the thermal head (A). The thermosensitive color former layer 3 is brought into contact with the thermosensitive color developing agent layer 3 to develop a color, and printing is performed.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a side view showing a method of using the embodiment wound in a roll shape.

[Explanation of symbols]

 1 Label Substrate 2 Pressure Sensitive Adhesive Layer 3 Thermosensitive Coloring Agent Layer 4 Protective Coating Layer 5 Release Sheet

Claims (5)

[Scope of utility model registration request] 1. A pressure-sensitive adhesive label comprising a pressure-sensitive adhesive layer formed on the back surface of a label base material and a thermosensitive color developing agent layer formed on the surface of the label base material, at least on the surface of the thermosensitive color developing agent layer. A thermosensitive color-sensitive adhesive label having water repellency, characterized in that a protective coating layer formed by applying a substance having water repellency including wax is formed. 2. The water-repellent substance is a wax-based emulsion type water repellent compounded with a special synthetic resin, and the water repellent agent is coated on one main surface of the label base material and heated. The thermosensitive color-developing adhesive label having water repellency according to claim 1, wherein a protective coating layer is formed by making it water repellent. 3. The water-repellent substance is a polycondensation resin,
An emulsion-type water repellent comprising a fatty acid derivative and a special wax as a main component. The water repellent according to claim 1, which is formed by applying the water repellent to form a protective coating layer. A heat-sensitive color-developing adhesive label having. 4. A water-repellent substance is a water-repellent agent mainly containing wax, paraffin, metal soap, and polyethylene. A protective coating layer obtained by applying the water-repellent agent to the main surface of a label substrate. The thermosensitive color-developing pressure-sensitive adhesive label having water repellency according to claim 1, wherein the label is formed. 5. The water-repellent substance is a water-repellent agent containing a synthetic resin, wax, a nonionic and anionic activator as a main component, and the protective layer is formed by applying the water-repellent agent. The thermosensitive color-developing pressure-sensitive adhesive label having water repellency according to claim 1, which is claimed.