JP2001040303A - Sticker seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sticker seal that is reduced in thickness so as to be stuck to something without pattern discontinuity and to be easily stuck even to a curved surface, which seal comprises a printed layer, a pressure-sensitive adhesive layer, and a release paper, wherein the pressure-sensitive adhesive layer is formed from a resin that is swellable with an organic solvent. SOLUTION: This seal comprises a printed layer, a pressure-sensitive adhesive layer, and a release paper. The pressure-sensitive layer is formed from a resin that is swellable with an organic solvent. From the viewpoint of safety, it is desirable that the organic solvent is an alcohol. From the viewpoint of swellability with an organic solvent, the strength before being swollen, etc., it is desirable that the resin swellable with an organic solvent is an acrylic synthetic resin. It is desirable that the printed layer is formed from a hydrophilic resin. This is favorable for ink-jet printing with a water-base ink. The hydrophilic resin is exemplified by an ethylene/vinyl acetate resin or an ethylene/acrylic acid resin. The printed layer may be made of a porous film. The porous film that can be used is one prepared from a composition prepared by dispersing fine particles of e.g. silica in a binder such as a polyvinyl alcohol.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive seal having various patterns printed on its surface.

[0002]

2. Description of the Related Art The above-mentioned pressure-sensitive adhesive seal is a thin sheet having a back surface coated with a pressure-sensitive adhesive and a pattern printed on the front surface. Used in places. As shown in FIG. 3, the structure of the adhesive seal 11 includes a printing layer 12, a base material layer 13, and an adhesive layer 1 in this order from the front side.
4 and a release paper 15 are generally laminated.

[0003] The base material layer 13 is a layer serving as a base material for securing strength and the like as a seal, and specifically, a synthetic resin film such as polyethylene or polypropylene, unbleached kraft paper, glassine paper or the like. Paper materials and the like are used. The printing layer 12 is formed by printing a pattern, and may be formed by printing on a base made of a synthetic resin or the like, or may be formed only by printing ink. The printing method is not particularly limited. Further, the adhesive layer 14 is for attaching the adhesive seal 11 to the surface to be adhered, and is formed by applying an adhesive to the lower surface of the base material layer 13. As the pressure-sensitive adhesive, various known pressure-sensitive adhesives can be used. One example is a water-soluble polyvinyl organic solvent that swells and adheres to water.

[0004] The "pattern" described in this specification is
Means various forms for decoration, characters, figures,
This is a concept including symbols.

[0005]

The conventional pressure-sensitive adhesive seal 11 has a predetermined thickness due to the laminated base material layer 13 and the like. It was causing discomfort. Further, since the base material layer 13 and the like are laminated as described above, the adhesive seal 1
1 has low flexibility, and when pasted on a curved surface, there are inconveniences such as wrinkling and floating.

The present invention has been made in view of these disadvantages, and provides an adhesive seal that can be reduced in thickness and, as a result, has no uncomfortable feeling when applied and can be easily applied to a curved surface. It is intended for.

[0007]

Means for Solving the Problems The invention made to solve the above-mentioned problems comprises a printing layer and an adhesive layer, and the adhesive layer is formed of a resin which swells with an organic solvent. is there. The adhesive seal is immersed in an organic solvent and swells the resin constituting the adhesive layer with the organic solvent, so that the adhesive layer exhibits adhesiveness and can be adhered to the surface to be adhered. On the other hand, since the pressure-sensitive adhesive layer that has not been swollen with an organic solvent has a certain degree of strength as a film-shaped synthetic resin, a base layer made of a synthetic resin or paper such as the above-mentioned conventional pressure-sensitive adhesive seal is used. This is unnecessary, and the thickness of the entire adhesive seal can be reduced by the thickness of the base layer. Therefore, it is possible to prevent a sense of incongruity of the pattern due to the thickness of the conventional pressure-sensitive adhesive seal and a generation of wrinkles generated when the pattern is attached to a curved surface.

[0008] Alcohol may be used as the organic solvent. Alcohol is generally readily available and highly safe.

It is preferable to use an acrylic synthetic resin as the resin which swells with the organic solvent. According to this means, the adhesiveness when wetted with an organic solvent and the role as a base material layer before being swollen with an organic solvent can be balanced at a high level.

The printing layer is preferably formed from a hydrophilic resin. Here, “hydrophilic resin” means a resin having a hydrophilic group and strong hydrophilicity. According to this means, it is suitable for inkjet printing using aqueous ink. In recent years, inkjet printers have become widespread,
With such an ink jet printer, a desired pattern can be arbitrarily printed. Further, even if the adhesive seal is immersed in an organic solvent, the printing layer formed of the hydrophilic resin is insoluble in the organic solvent, and thus does not adversely affect the printing of the printing layer.

Further, the printing layer may be formed from a porous film. With this porous film, the ink can penetrate even if it does not have hydrophilicity, and the above-described ink jet printing can be performed. In addition, since there is no need to consider hydrophilicity, a material having high water resistance can be selected, and as a result, the water resistance of the pressure-sensitive adhesive seal can be improved.

A release paper may be laminated on the back surface of the adhesive layer. According to this means, a) the adhesive layer can be effectively protected until it is stuck with release paper, b) the handling, storage, transportation, etc. of the adhesive seal become convenient, c) printing with a thickness The effect of improving the transportability in the machine and d) improving the strength of the release paper can prevent the adhesive seal from curling.

As the release paper, paper having high permeability to an organic solvent is preferably used. According to this means, by immersing the adhesive seal in an organic solvent while the release paper is laminated, the organic solvent easily soaks into the release paper, and as a result, the adhesive layer is swollen with the organic solvent. And the release paper can be easily peeled off.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings as appropriate. FIG. 1 is a schematic sectional view showing an adhesive seal according to an embodiment of the present invention, and FIG. 2 is a schematic sectional view showing an adhesive seal having a form different from that of the adhesive seal of FIG.

The adhesive seal 1 shown in FIG. 1 comprises a printing layer 2 and an adhesive layer 3 laminated on the back surface of the printing layer 2. The printing layer 2 is formed of a hydrophilic resin or a porous film having good absorbability and initial drying property with respect to the aqueous ink, and is subjected to inkjet printing on the surface to form a pattern with the aqueous ink. ing.

The hydrophilic resin that can be used for the printing layer 2 is not particularly limited as long as it has hydrophilicity.
For example, polyethylene, polymethylpentene, ethylene vinyl acetate resin, ethylene ethyl acrylate resin, ethylene acrylic acid resin, ethylene methacrylic acid resin, ethylene methyl acrylate resin, ionomer resin, polyvinyl organic solvent, polyester and the like can be mentioned.

The porous film used for the printing layer 2 includes:
For example, a binder obtained by mixing and dispersing fine particles such as silica, colloidal silica, alumina, colloidal alumina, and pseudobait in a binder such as polyvinyl alcohol, polyvinylpyrrolidone, acrylic acid, carboxymethyl cellulose, and starch can be used.

The adhesive layer 3 is formed of a resin that swells with an organic solvent. Examples of the resin that can swell with the organic solvent include acrylic resins, urethane resins, polystyrene resins, polyester resins, and polyamide resins. Resins. Among these, acrylic synthetic resins are preferred in consideration of the swelling property of the organic solvent and the strength before swelling.

The organic solvent used for swelling the adhesive layer 3 is not particularly limited, and includes, for example, hexane, benzene, ethanol, primary amine, acetone, ether and the like. Alcohol is preferred in view of the properties and availability.

According to the pressure-sensitive adhesive seal 1 having the above structure, the resin constituting the pressure-sensitive adhesive layer 3 is swelled with the organic solvent by being immersed in an organic solvent, so that the pressure-sensitive adhesive layer 3 exhibits adhesiveness, and the surface to be adhered. The adhesive seal 1 can be attached to the adhesive.
On the other hand, the pressure-sensitive adhesive layer 3 that has not been swollen with the organic solvent before the application is
Because it has a certain degree of strength, it is possible to secure the strength as a seal without the need for the synthetic resin or paper base layer required by the conventional adhesive seal, and as a result, only the thickness of the base layer The thickness of the entire adhesive seal can be reduced. Therefore, it is possible to prevent the pattern caused by the thickness of the conventional pressure-sensitive adhesive seal from being uncomfortable, and to prevent the occurrence of wrinkles or the like when applied to a curved surface.

The pressure-sensitive adhesive seal 1 is preferably laminated on the back surface of the pressure-sensitive adhesive layer 3 using a peelable paper or film as a carrier. By stacking such carriers, it is possible to avoid inconvenience caused by thinness in a printing process or the like.

The adhesive seal 5 shown in FIG. 2 is similar to the adhesive seal 1 in that the printing layer 2 and the adhesive layer 3 are sequentially laminated from the front side. Since the contents of the printing layer 2 and the adhesive layer 3 of the adhesive seal 5 are the same as those of the adhesive seal 1, the same reference numerals are given and the description is omitted. The pressure-sensitive adhesive seal 5 differs from the pressure-sensitive adhesive seal 1 in that a release paper 6 is laminated on the back surface of the pressure-sensitive adhesive layer 3. The adhesive layer 3 can be protected by the release paper 6.

As the release paper 6, paper having high permeability to an organic solvent is used. Therefore, when the adhesive seal 5 is immersed in an organic solvent, the organic solvent easily soaks into the release paper 6, and the adhesive layer 3 can be swollen with the organic solvent. When the organic solvent is impregnated into the release paper 6 in this way, the release paper can be easily peeled off.

The pressure-sensitive adhesive seal of the present invention is not limited to the above-described embodiment. For example, a printing means for forming a printing layer can be applied by means other than the above-described ink jet method. In this case, the material of the fabric to be printed may be appropriately changed according to the characteristics of the printing ink used in the printing method. Further, a printing layer formed by printing directly on the adhesive layer and using only the printing ink is also possible. Further, as long as the adhesive layer is insoluble in an organic solvent and can be printed, it can be made of a material other than a hydrophilic resin or a porous film.

[0025]

As described above, according to the pressure-sensitive adhesive seal of the present invention, it is possible to omit the base material layer such as a synthetic resin film required for the conventional pressure-sensitive adhesive seal. It can be thinned by the minute. Therefore, it is possible to reduce a sense of discomfort of the pattern caused by the thickness of the adhesive seal, which is generated when the adhesive seal is attached to the surface to be attached. In addition, since the base material layer can be omitted as described above, the flexibility of the pressure-sensitive adhesive seal can be improved, and the pressure-sensitive adhesive can be easily attached to a curved surface, and the pressure-sensitive adhesive seal does not suffer from wrinkling or floating during application. Further, an adhesive sticker on which a desired pattern is arbitrarily printed can be created by a commonly available printer such as an ink jet system.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an adhesive seal according to one embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing an adhesive seal different from the adhesive seal of FIG.

FIG. 3 is a schematic sectional view showing a conventional general adhesive seal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesive seal 2 Printing layer 3 Adhesive layer 5 Adhesive seal 6 Release paper

Claims (7)

[Claims] 1. An adhesive seal comprising a printing layer and an adhesive layer, wherein the adhesive layer is formed of a resin which swells with an organic solvent. 2. The adhesive seal according to claim 1, wherein the organic solvent is an alcohol. 3. An acrylic synthetic resin is used as the resin which swells with the organic solvent.
The adhesive seal according to 1. 4. The pressure-sensitive adhesive seal according to claim 1, wherein the printing layer is formed of a hydrophilic resin. 5. The pressure-sensitive adhesive seal according to claim 1, wherein the printing layer is formed of a porous film. 6. The adhesive seal according to claim 1, wherein release paper is laminated on the back surface of the adhesive layer. 7. The pressure-sensitive adhesive seal according to claim 6, wherein paper having high permeability to an organic solvent is used as the release paper.