JP2001134188A - Thermosensitive label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermosensitive label which has a thermosensitive adhesive exposed all over the surface and is easily stripped. SOLUTION: This thermosensitive label has the thermosensitive adhesive all over the rear side of the label substrate and has a coated amount changed in the form of a pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sensitive label which can be easily peeled off.

[0002]

2. Description of the Related Art Thermosensitive labels are used by being attached to the surface of bottles such as glass bottles and plastic bottles, and other various articles. The structure is such that a printed pattern is formed on the surface of a label substrate such as paper. The back surface is coated with a heat-sensitive adhesive. Further, in the case of articles such as glass bottles and plastic bottles, it may be necessary to peel off the heat-sensitive label to reuse the article, and to be able to peel off the heat-sensitive label.

[0003] Normally, in a heat-sensitive label, the heat-sensitive adhesive is formed by being uniformly applied on the entire back surface of the base material label. Is required. When it is necessary to forcibly peel off the bonded thermal label, it often happens that the thermal label cannot be easily removed if the thermal adhesive is applied to the entire surface. For this purpose, instead of applying the heat-sensitive adhesive to the entire surface of the label base material, printing may be performed in a pattern (dot, line, grid, pattern, etc.) in which the heat-sensitive adhesive is not applied partially. Will be In this way, it is easy to peel off. The idea is that the release varnish is printed in a pattern (dots, lines, grids, patterns, etc.) on the entire surface where the heat-sensitive adhesive is applied so that the release varnish does not adhere. Has also been applied.

However, when the surface of the back surface of such a heat-sensitive label is viewed, the one made of a portion where the heat-sensitive adhesive is exposed on the front surface and a portion where the heat-sensitive adhesive is not exposed is exposed. There is a necessary adhesive strength in the part, and there is no adhesion in the part that is not exposed, so the bonded thermal label has too much difference in adhesive strength, and when you try to peel off the thermal label, it will cause paper peeling Often. Further, when the label base material is paper, if the paper is exposed, it may absorb moisture and cause wrinkles on the label.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat-sensitive adhesive label which solves the above-mentioned problems and which has the heat-sensitive adhesive exposed on the entire surface and is easily peeled off.

[0006]

In order to achieve the above object, according to the present invention, there is provided a label base material having a heat-sensitive adhesive on the entire back surface thereof and applying the heat-sensitive adhesive in a pattern. This is a heat-sensitive label characterized in that the coating amount is changed.

[0007]

Embodiments of the present invention will be described below. The label base material is paper or laminated paper mainly composed of paper. Heat-sensitive adhesives have good adhesive properties when no heat is applied.
There is no tackiness, and adhesion can only be achieved by applying heat. It is selected from thermoplastic resins such as ethylene-vinyl acetate resin. To have a heat-sensitive adhesive on the entire back surface and change the amount of the heat-sensitive adhesive applied in a pattern, first use a coating machine such as a roll coater or provide a uniform coating layer with a printing machine, and then gravure printing Use a printing machine such as a printing machine to print the areas where you want to increase the amount of coating. In the gravure printing machine, the coating amount can be changed by providing a difference in the depth of the plate on the entire surface of the gravure plate.

When the amount of the heat-sensitive adhesive to be applied is large, it is 8 to 1
5 g / m <2>, and 3 to 8 g / m <2> where appropriate, is preferred. However, the amount is not limited.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. <Example 1> A basis weight of 84.9 which is paper as the label base material 2
Using a single art paper (manufactured by Mitsubishi Paper Mills Co., Ltd .; single art G) of g / m 2, printed pattern 3 was printed on the surface on which the surface was art-coated. DLA manufactured by Dainippon Ink Mfg. Co., Ltd.
Using -305, a heat-sensitive adhesive uniform coating layer 4 was prepared using a gravure printing machine to apply the first color uniformly over the entire surface at a coating amount of 6.5 g (dry) / m 2. Next, the same heat-sensitive adhesive was printed in the second color of the same gravure printing machine in a pattern in which circles (dots) having a diameter of 2 mm and dots were arranged at intervals of 5 mm as shown in FIG. 2 at an application amount of 6.5 g (dry) / m 2. Thus, a heat-sensitive adhesive pattern layer 5 was provided. In this way, as shown in FIG. 1, a heat-sensitive label 1 having a heat-sensitive adhesive on the entire surface and applying the heat-sensitive adhesive in a pattern in a varied amount
It was created. This thermal label has a total of 13 dots.
g (dry) / m 2.

[0010] Using this heat-sensitive label 1 on a glass plate
Lamination was performed for 5 seconds at a temperature of 80 ° C. and a pressure of 5 kg / m 2.
The thermal label was stuck neatly without floating on the whole surface. After the heat-sensitive label 1 cooled, the heat-sensitive label 1 was peeled off, but the heat-sensitive label 1 could be easily peeled off, and the paper did not peel off.

Comparative Example 1 13 g (dry) of the heat-sensitive adhesive used in Example 1 was applied to the back surface of a label substrate having a printed pattern on the front surface used in Example 1 by a coating method. m2) was applied uniformly over the entire surface to prepare a heat-sensitive label. This heat-sensitive label was adhered in the same manner as in Example 1, but it was extremely difficult to peel it off.

<Comparative Example 2> A pattern using the heat-sensitive adhesive used in Example 1 in Example 1 was used on the back surface of the label substrate having a printed pattern applied to the surface used in Example 1. The printing was repeated twice to produce a heat-sensitive label having a thickness of 13 g (dry) / m 2. The heat-sensitive label was adhered in the same manner as in Example 1, but when peeled off, paper peeling occurred. Also,
If this thermal label was stored, it absorbed moisture and wrinkles occurred.

[0013]

As described above, the present invention has the following effects. That is, since the entire surface is exposed with the heat-sensitive adhesive, the entire surface of the heat-sensitive label can be bonded to the article,
In addition, since the heat-sensitive adhesive is in a pattern, the strength of the adhesive is adjusted so that the peeling is smooth and easy, and the paper does not peel off. Therefore, the present invention exerts excellent practical effects in applications such as heat-sensitive labels that require easy peelability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a heat-sensitive label according to a first embodiment of the present invention.

FIG. 2 is a plan view in which a heat-sensitive adhesive is printed in a pattern or a pattern of a release varnish.

[Explanation of symbols]

 1: Thermal label 2: Label base material 3: Print pattern 4: Thermal adhesive uniform coating layer 5: Thermal adhesive pattern printing layer

Claims (1)

[Claims] 1. A heat-sensitive label comprising a heat-sensitive adhesive on the entire back surface of a label substrate, and the amount of the heat-sensitive adhesive applied in a pattern is changed.