JPH0353895Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an improvement of adhesive paper in which an adhesive layer is formed on the back side of top paper and the surface of the adhesive layer is protected with release paper. The present invention relates to an adhesive paper that can provide a label that retains a release paper on its adhesive surface even after the label is issued by various labelers.

(Conventional technology) With the spread of POS systems, adhesive paper has begun to be used extensively for price tag labels at supermarkets and process control labels at factories. In particular, handy type thermal recording labelers with built-in rechargeable batteries,
Because it is easy to carry anywhere, it is widely used in supermarkets for pricing work, etc. In various types of labelers, including such cases, adhesive paper has been used in which a release paper is provided on the back side of a top sheet of paper with an adhesive layer interposed therebetween. When issuing labels using these various labelers, use adhesive paper such as the one described above, and when issuing the label, tear off the release paper, issue the label with the adhesive surface exposed on the back, and immediately affix the label to the required location. On the other hand,
The peeled release paper is returned to the labeler to serve as a feeder for the adhesive paper within the labeler.
For this reason, as long as conventional adhesive paper is used, it has been impossible due to the mechanism of the labeler to issue a label while holding the release paper.

(Problem that the invention aims to solve) If labels can be issued with release paper still attached, it would be convenient to issue multiple labels in advance with one labeler and attach them to items later. . For this reason, there was a need for adhesive paper that would enable this type of work.

In order to do this, one idea is to apply more adhesive to the back side of the release paper of the adhesive paper and attach another layer of release paper to create a three-layer adhesive paper: top paper + release paper + release paper. However, in that case, an adhesive layer would be provided on the back side of the release paper layer that was initially provided on the back side of the issued label, making handling inconvenient.

In order to laminate one more layer of paper without using an adhesive, you can consider so-called dry lamination, which uses an adhesive, or extrusion lamination, which involves melting and extruding polyethylene resin, etc., but with dry lamination, the bonded parts are removed later. It cannot be peeled off, and even with extrusion laminates, the bonded parts cannot usually be peeled off, and even if it were possible, it would be difficult to control the peel strength to a constant level.

(Means for Solving the Problems) As a result of extensive research in order to solve the above-mentioned problems, the present inventors formed a temporary adhesive layer on the back side of the release paper of the above-mentioned adhesive paper. We found that a solution could be achieved by doing this. That is, the present invention is characterized in that a release paper is laminated on the back side of the upper paper via an adhesive layer, a temporary adhesive adhesive layer is provided on the back side, and a carrier layer is laminated on top of that. This paper relates to adhesive paper. With the adhesive paper of the present invention, by adopting such a configuration, it becomes possible to easily issue a label with the release paper attached to the back side of the label.

In the present invention, the temporary adhesive layer formed on the back side of the release paper of the adhesive paper is preferably formed of an ethylene/vinyl acetate/wax adhesive.

The ethylene/vinyl acetate/wax adhesive referred to herein is composed of an ethylene/vinyl acetate copolymer emulsion and a wax emulsion. By applying this adhesive in water to carrier paper, immediately bonding it to the back side of the release paper of the adhesive paper, and gently drying at a temperature of 30°C to 70°C, a temporary adhesive layer is created. form.

The reason why wax emulsion is mixed with ethylene/vinyl acetate copolymer emulsion is to control the releasability. That is, if the ethylene/vinyl acetate copolymer emulsion is used alone, the carrier paper layer will completely adhere to the back surface of the release paper, and it will be impossible to peel it off later. Further, wax emulsion alone does not have sufficient adhesion, and the carrier layer cannot be laminated properly. For this purpose, it is necessary to mix 40 to 90% by weight of wax emulsion with respect to the ethylene/vinyl acetate copolymer. If the wax emulsion is less than 40%, the releasability will not be sufficient, and if it is more than 90%, the adhesion will not be sufficient when laminated. The carrier layer laminated via such an adhesive layer can be easily peeled off, and the back side of the release paper of the adhesive paper after peeling off is completely non-adhesive.
Extremely easy to handle.

However, in the case of the adhesive paper of the present invention, the adhesive has temporary adhesive properties, that is, it holds the carrier layer on the back side of the release paper until the label is issued by a labeler, and forms an adhesive layer that does not exhibit any tackiness after the label is issued. If so, a temporary adhesive adhesive layer can be formed.

For applying the adhesive, a roll coater, a bar coater, a gravure coater, and other known coating methods can be used. The amount of adhesive applied is 0.5~
around 10 g/m ² , with the optimum coating weight depending on the degree of porosity of the carrier paper and adhesive paper.

For example, when both the carrier paper and the release paper are glassine paper, the optimum coating amount is 1 to 5 g/m ² . Also, slow drying is to prevent the finished product from curling, but especially if the top sheet of adhesive paper is heat-sensitive recording paper, drying at high temperatures is not recommended to prevent color development. Can not.

The carrier layer to be provided via the temporary adhesive adhesive layer can be formed using high-quality paper, coated paper, bleached kraft paper, unbleached kraft paper, single-gloss paper, cast paper, glassine paper, semi-glassine paper, etc.
As mentioned above, since it is desirable to form a temporary adhesive layer by wet lamination, it is necessary to have some degree of porosity. For this reason, film cannot generally be used. Non-woven fabrics or porous films can be used.

In the adhesive paper of the present invention, various commonly used adhesives can be used for the top paper and release paper adhesive.

For example, top-sheet papers include wood-free paper, coated paper, cast-coated paper, synthetic paper, various films (polyester, acetate, polypropylene, etc.), and heat-sensitive paper based on these with a heat-sensitive coloring layer or protective layer coated on top. Recording paper can be used.

As the release paper, high quality paper, glassine paper, coated paper, cast coated paper, etc. can be used. Silicone resin is often used as a release agent, and polyvinyl alcohol, polyethylene, etc. are used as sealants. Adhesives include acrylic,
Most of them are rubber-based and are supplied in various forms such as solvent type, emulsion type, and hot melt type.

(Example) An example of the adhesive paper of the present invention is shown in FIGS. 1 and 2. In FIG. 1, reference numeral 1 denotes a top sheet, on the back of which a release paper 3 is laminated with an adhesive layer 2 interposed therebetween. A carrier layer 5 is laminated on the back side of the release paper layer 3 with a temporary adhesive layer 4 interposed therebetween.

FIG. 2 shows an example of adhesive paper in which cuts are made in the top sheet. That is, a top sheet 1 constituting adhesive paper is laminated with a release paper layer 3 via an adhesive layer 2, and a seal is printed and punched. As in FIG. 1, 4 is a temporary adhesive layer, and 5 is a carrier layer. The individual labels formed by the incisions are indicated at 6.

FIG. 3 is an explanatory diagram when a label is issued using the adhesive paper of the present invention. Carrier layer 5
is peeled off and individual labels are issued with release paper attached.

Production example ¹ Silicone release agent (SRX-
357, manufactured by Toray Silicone Co., Ltd.) at a dry weight of 1.2 g/m ²
Coat it to make a glassine paper-based release paper.

An acrylic emulsion adhesive (BPW-3110H, manufactured by Toyo Ink Mfg. Co., Ltd.) was dry coated on this release paper at 20 to 22 g/m ² and dried at 110 to 120°C.
A high-quality paper-based thermal recording paper (OTO-32, manufactured by Oji Paper Co., Ltd.) is pasted together to obtain thermal recording adhesive paper.

30 parts of ethylene/ ^vinyl acetate emulsion (Sumikaflex 400, manufactured by Sumitomo Chemical Co., Ltd.) and wax emulsion (T-350,
70 parts of the mixture (manufactured by Hoechst Japan Co., Ltd.) was coated with a bar coater to a dry weight of 3 g/ ^m2 ,
The above heat-sensitive recording adhesive paper is laminated and dried at 60 to 65°C to obtain the adhesive paper of the present invention.

The peeling force between the carrier paper and release paper of the adhesive paper obtained in this way is 5 to 20 g/25 mm (peeling speed
(0.3 m/min, 180 degree peel), and there were no problems with peelability with a labeler.

Production example 2 64g/ ^m2 glassine paper (sealed with polyvinyl alcohol) with silicone release agent) SRX-
357, manufactured by Toray Silicone Co., Ltd.) at a dry weight of 1.2 g/m ²
Coat it to make a glassine paper-based release paper.

This release paper is coated with an acrylic solvent-based adhesive (KP-
981, manufactured by Nippon Carbide Industries Co., Ltd.) for 20~
Coat 22g/ ^m2 , dry at 95-105℃, and bond with synthetic paper-based thermal recording paper (OTY-85K, manufactured by Oji Yuka Synthetic Paper Co., Ltd.) to obtain thermal recording adhesive paper. .

Ethylene-vinyl acetate emulsion (Sumikaflex 510, Sumitomo Chemical Co., Ltd.) on 64 g/ ^m2 high-quality paper
Co., Ltd.) and 80 parts of wax emulsion (T-730, manufactured by Hoechst Japan Co., Ltd.) using a gravure coater to give a dry coating weight of 2 g/m ² . pasted together, 60~65
The adhesive paper of the present invention is obtained by drying at ℃.

The peeling force between the carrier paper and release paper of the adhesive paper obtained in this way is 5 to 20 g/m ² (peel speed
The peelability with a labeler was also good.

(Effects of the invention) As explained in detail above, the present invention provides an adhesive paper with a temporary adhesive layer on the back side of the release paper and a carrier layer laminated through this, thereby making it possible to improve the adhesive paper compared to the conventional one. This makes it possible to issue labels with release paper using the same labeler, and achieves excellent effects that contribute to increased efficiency in labeling.

[Brief explanation of drawings]

FIG. 1 is an explanatory cross-sectional view showing the layer structure of the adhesive paper of the present invention, and FIG. 2 is an explanatory diagram of the adhesive paper of the present invention in which a label is made by printing a sticker on the top sheet and punching it out. FIG. 3 is an explanatory diagram illustrating the label issuance situation in the labeler for adhesive paper. 1...Top paper, 2...Adhesive layer, 3...Release paper,
4... Temporary adhesive adhesive layer, 5... Carrier layer, 6
……label.

Claims (1)

[Claims for Utility Model Registration] (1) Features: A release paper is laminated on the back side of top paper via an adhesive layer, and a carrier layer is further laminated on the back side via a temporary adhesive layer. adhesive paper. (2) The adhesive paper according to claim 1 of the utility model registration claim, wherein the top paper is heat-sensitive recording paper.