JPH0575781U - label - Google Patents

Abstract

(57) [Summary] [Purpose] A label with sufficient concealing property does not peel off accidentally before use, and when peeled after being attached to an adherend, there is no uneven peeling. The purpose is to obtain a smooth delamination. [Structure] A laminate comprising a paper and a transparent or opaque film and having a concealing property, a transparent ink layer, a pressure-sensitive adhesive layer, and release paper, which are laminated in this order. A label in which delamination is performed between the transparent ink layer and a tackifier having a softening point of 100 ° C to 130 ° C added thereto.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a label for temporarily concealing characters and patterns on the surface of an adherend.

[0002]

[Prior Art]

 Recently, payments for insurance, electricity, telephone, etc. are being made by automatic transfer, so a notice of the amount deducted will be mailed. This notification was a sealed letter in the old days, but in recent years it has become common to use postcards with low postage. Since the contents of this postcard may be seen by others, it is necessary to take some measures to protect the privacy. Therefore, various labels have been developed that cover a part of a postcard and conceal the contents of the postcard. For example, Japanese Examined Patent Publication No. 55-15035 discloses a label in which paper, a transparent film, a pressure-sensitive adhesive layer, and release paper are laminated in this order from the top so that the paper and the transparent film can be separated. ing. If this label is once attached to the adherend and then peeled off, the adhesive strength is lost, and it is possible to determine whether the label has been peeled off illegally. However, in this configuration, once the label is peeled off after being attached to the adherend, delamination occurs between the paper and the transparent film, and the transparent film remains on the surface of the adherend. This included problems such as the paper warping due to the difference in stretchability of the paper, and the flexibility of the paper originally being impaired due to the thickness of the film. Therefore, the present inventors have developed a label as disclosed in Japanese Utility Model Laid-Open No. 3-66772 in order to solve the above problems. That is, it is a label in which paper is laminated from the top with a transparent or opaque film, a transparent ink layer, a pressure-sensitive adhesive layer, and release paper so that the transparent or opaque film and the transparent ink layer can be peeled off. .. With this configuration, when the label is peeled off after it has been applied to the adherend, only the transparent ink layer remains on the surface of the adherend, causing the paper to curl and the flexibility to be lost. It was possible to obtain the excellent effects that there was no problem such as the above, that there was no peeling unevenness, smooth delamination was obtained, and that the delamination strength could be easily adjusted.

[0003]

[Problems to be solved by the device]

 However, the label of Japanese Utility Model Laid-Open No. 3-66772 has the above-described excellent effect during use, but it rarely peels off from the release paper before use, that is, in the physical distribution stage. Occasionally. Therefore, it is an object of the present invention to provide a label that can obtain good delamination at the time of use and does not accidentally come off before use.

[0004]

[Means for Solving the Problems]

 In the label of the present invention, the peel strength is adjusted by adding a tackifier having a softening point of 100 ° C. or higher and 130 ° C. or lower to the transparent ink layer to solve the above problems. That is, this label is composed of a paper and a transparent or opaque film and has a concealing property, a transparent ink layer applied to the film side of the laminate, and a pressure-sensitive adhesive to the transparent ink layer. A label comprising a release paper that is releasably adhered via an agent layer, wherein the label is releasable between the laminate and the transparent ink layer, wherein the transparent ink layer has a softening point of 100 as a tackifier. It is characterized in that a material having a temperature of ℃ or higher and 130 ℃ or lower is added.

[0005]

[Action]

 According to the present invention, a peeling strength of 30 g to 200 g / 25 mm width (180 degree peeling 300 mm / min) is obtained, and there is no fear of accidentally peeling off from the release paper before use, and an adherend The contents on the surface of the adhesive tape are hidden, and the adhesive strength between the film layer and the transparent ink layer when the adhesive layer is peeled off after being attached to the adherend is such that the adherend and the pressure-sensitive adhesive layer Since the adhesive strength is weaker than the adhesive strength between the label and the label, the label peels off between the film layer and the transparent ink layer, leaving only the transparent ink layer on the surface of the adherend. It will be possible.

[0006]

【Example】

 <First Embodiment> An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, in order from the top, the paper 1, the ink ink layer 7, the adhesive layer 2, the transparent film 3a, the transparent ink layer 4, the pressure-sensitive adhesive layer 5, and the release paper 6 are provided, and the transparent film 3a and A peeling surface 8 is formed between the transparent ink layer 4 and the transparent ink layer 4. In the case of this embodiment, the hiding property of the label is ensured by the Sumi ink layer 7. Then, a vinyl chloride / polyester resin (polymerization degree: 500) was used as a transparent ink layer, and a tackifier having a softening point of 120 ° C. was added at a component ratio of the resin to the tackifier of 95: 5. Alkylphenol resin, xylene resin, petroleum resin, coumarone indene resin, terpene resin, rosin, etc. are generally used for this tackifier, and can be arbitrarily selected.

This label can be produced, for example, by the following steps. That is, first, smear ink is solid-printed on the back surface of the paper 1 to form a smear ink layer 7, and this is adhered to one side of the transparent film 3 a with an adhesive 2. Next, the other surface of the transparent film 3a is coated with a transparent ink to form a transparent ink layer 4. On the other hand, the pressure sensitive adhesive is applied to the release paper 6 and dried to form the pressure sensitive adhesive layer 5. Next is a step of laminating the pressure-sensitive adhesive layer 5 and the transparent ink layer 4.

It is not always necessary to bond the transparent film 3a and the Sumi ink layer 7 via the adhesive layer 2, but the back surface of the Sumi ink layer may be directly coated with a thermoplastic resin using an extruder. Then, the adhesive layer 2 can be omitted.

The thus-obtained label had a peel strength of 30 g to 150 g / 25 mm width (180 degree peeling 300 mm / min), and was not peeled off from the release paper 6 in the physical distribution stage before use. Then, the release paper 6 was peeled off, and a label was attached to the portion of the postcard 9 to be hidden. In this state, even if the postcard 9 was seen through, the concealed portion was unreadable. Next, when the label is peeled off, the adhesive strength between the transparent ink layer 4 and the transparent film 3a is weaker than the adhesive strength between the postcard 9 and the pressure-sensitive adhesive layer 5, so that the label is peeled off. It was easily peeled off from the surface 8. Then, only the transparent ink layer 3a remained cleanly on the surface of the postcard 9, and the contents described in the postcard 9 could be read from above the transparent ink layer 3a.

Comparative Example Next, a comparative example in the case where no tackifier is added to the transparent ink layer 4 will be introduced. The structure of this label is exactly the same as that of the first embodiment, and in order from the top, the paper 1, the ink layer 7, the adhesive layer 2, the transparent film 3a, the transparent ink layer 4, the pressure-sensitive adhesive layer 5, and the peeling layer. It is composed of paper 6 and has a peeling surface 8 between the transparent film 3 a and the transparent ink layer 4. However, the transparent ink layer 4 was made of vinyl chloride / polyester resin, and no tackifier was added.

When this label was produced and stored in the steps as in the first embodiment, it was found that some of the labels were peeling off from the corners.

The following table introduces the results of experiments conducted to obtain an appropriate range of peel strength.

[0013]

[Table 1]

As described above, it can be understood that if tackifier is not added at all, it may be peeled off from the release paper before use, although there is no problem during use. Moreover, it does not mean that any tackifier can be used.If the softening point of the tackifier to be added is too high, the peel strength will drop extremely, so the effect of adding tackifier will not appear, and if it is too low, the It can be seen that can not be completely peeled off during use. Therefore, in order to prevent peeling off before use and to obtain good delamination during use, it is necessary to add a grade of tackifier having a softening point of 100 ° C to 130 ° C to the transparent ink layer 4. It can be said that it is the most preferable.

Second Embodiment This embodiment is another embodiment of the layer structure of the label, and as shown in FIG. 2, the paper 1, the adhesive layer 2, the ink ink layer 7, and the transparent layer are arranged in this order from the top. It comprises a film 3a, a transparent ink layer 4, a pressure-sensitive adhesive layer 5, and a release paper 6, and a peel surface 8 is provided between the transparent film 3a and the transparent ink layer 4. Also in this embodiment, the hiding property of the label is ensured by the Sumi ink layer 7. Compared with the first embodiment, all are the same except that the stacking order of the Sumi ink layer 7 and the adhesive layer 2 is reversed.

The method for producing this label is, for example, by printing Sumi Ink on one surface of the transparent film 3a and coating the transparent ink on the other surface of the transparent film 3a. There is a method in which the paper 1 is adhered via 2 and the release paper 6 is adhered to the transparent ink layer 4 side via the pressure sensitive adhesive 5. The label thus obtained had the same effect as that of the first embodiment.

Although a transparent film is used as the film in the first and second embodiments, an opaque film may be used to enhance the concealing property.

<Third Embodiment> This embodiment is another embodiment of the layer structure of the label, and as shown in FIG. 3, the paper 1, the adhesive layer 2, the opaque film 3b, and the transparent layer are arranged in this order from the top. It comprises an ink layer 4, a pressure-sensitive adhesive layer 5 and a release paper 6, and a release surface 8 1 is between the opaque film 3b and the transparent ink layer 4.

In the case of this embodiment, the hiding property of the label is secured by the opaque film 3b. The opaque film 3b is made of a thermoplastic resin film such as polyvinyl chloride, polyethylene, polypropylene or the like and has an opaque pigment having a high hiding property, for example, a black pigment such as carbon black or a white pigment such as titanium white in an appropriate amount (for example, 30). In the case of a film thickness of μm, a film having a particle size of about 30 μm mixed and dispersed can be used.

As a method for producing this label, for example, the paper 1 or the opaque film 3b is coated with an adhesive layer 2 (for example, a two-component urethane resin), these are adhered and laminated, and then a transparent ink is applied. The transparent ink layer 4 is formed by coating the opaque film 3b side. On the other hand, there is a method in which the release paper 6 is coated with a pressure-sensitive adhesive, dried and then laminated on the surface of the obtained pressure-sensitive adhesive layer 5 and the transparent ink layer 4.

The label of this embodiment is different from the first and second embodiments only in that the hiding property of the label is ensured by the opaque film 3b, and thus the label has no Sumiink layer. The other layer configurations are the same. The label thus obtained had the same effect as that of the first embodiment.

In the first to third embodiments, the transparent ink layer may be made of an acrylic resin, a urethane resin, a vinyl chloride / vinyl acetate copolymer, or a mixture thereof, but the degree of polymerization is preferably 500 to 600. It is preferable to use the one of the degree. If the degree of polymerization is too high and it is hard, it tends to peel off after it remains on the adherend, which is not aesthetically pleasing.

The transparent or opaque film can be arbitrarily selected from thermoplastic resins such as vinyl chloride, polyethylene and polyethylene terephthalate.

[0024]

[Effect of the device]

 According to the present invention, since tackifier is added to the transparent ink layer, it can be peeled between the transparent film or the opaque film and the transparent ink layer without accidentally peeling off before use. Therefore, good interlayer separation can be obtained during use. Further, a label with high concealing property can be obtained by using an opaque film or providing a Sumi ink layer.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, (a) is a sectional view showing a state before use, and (b) is a sectional view showing a state at the time of peeling.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Paper 2 ... Adhesive layer 3a ... Transparent film 3b ... Opaque film 4 ... Transparent ink layer 5 ... Pressure-sensitive adhesive layer 6 ... Release paper 7 ... Sumi ink layer 8 ... Release surface 9 ... Postcard

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location B42D 15/02 501 B 7008-2C D21H 27/30 27/00 G09F 3/02 C 7028-5G / / B32B 27/00 E 7717-4F (72) Inventor Toshihiko Yamane 1-5-1 Taito, Taito-ku, Tokyo Inside Toppan Printing Co., Ltd. (72) Masaaki Yamamoto 3-19-25 Shibaura, Minato-ku, Tokyo No. Avery Toppan Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A laminate comprising a paper and a transparent or opaque film and having a concealing property, a transparent ink layer applied to the film side of the laminate, and a pressure-sensitive adhesive on the transparent ink layer. In a label comprising a release paper releasably adhered via a layer, wherein the label is releasable between the transparent or opaque film and the transparent ink layer, the transparent ink layer has a softening point of 100 as a tackifier.
A label characterized by being added at a temperature between ℃ and 130 ℃.