JP2004295002A - Label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a label which prevents stripping of a tacky adhesive from the label and permits resticking of the label. <P>SOLUTION: The label 10 which has a label base material and a tacky adhesive layer 14 and is formed by being attached onto a release sheet 20. The label has an anchor layer 13 for improving the adhesive strength of the label base material and the tacky adhesive layer between the label base material and the tacky adhesive layer and is characterized by that a tackifier is not added to the tacky adhesive layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a label having an adhesive layer and peelable from a release sheet.
[0002]
[Prior art]
Conventionally, as a label having an adhesive layer and peelable from a release sheet, there is a label in which an adhesive layer is applied to the lower surface of a transparent film as a label substrate, and the adhesive layer is attached to a release paper ( For example, see Patent Document 1.) Further, there is a label substrate having a pressure-sensitive adhesive layer on the lower surface of a label substrate having a printing ink layer formed on the surface thereof, which is attached to a release sheet (for example, see Patent Document 2).
[0003]
[Patent Document 1]
JP-A-2002-221905
[Patent Document 2]
JP-A-2002-6743
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned conventional example, when the label is peeled off from the release sheet, a part of the adhesive contained in the adhesive layer may be separated from the label base material and may remain on the release sheet.
[0005]
For this reason, for example, when the label is a campaign sticker, once the label attached to the product is peeled off, and the label is attached again to a postcard or the like in accordance with the instruction of the advertisement of the campaign or the like, the force of attaching the label again. There is a problem that falls. Further, the adhesive remaining on the product side may impair the beauty of the product.
[0006]
Therefore, an object of the present invention is to provide a label that can prevent the adhesive from peeling off the label and can be re-applied.
[0007]
[Means for Solving the Problems]
A typical configuration of the present invention for achieving the above object has a label substrate and an adhesive layer, and in a label pasted on a release sheet, between the label substrate and the adhesive layer. Has an anchor layer for improving the adhesive strength between the label substrate and the adhesive layer, and does not add a tackifier to the adhesive layer.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The label of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of the label of the present invention.
[0009]
As shown in FIG. 1, the label 10 of the present invention is attached to a release sheet 20. The label 10 is divided into multiple layers, and is formed by laminating a transparent film layer 11, a printing layer 12, an anchor layer 13, and an adhesive layer 14 from above. Hereinafter, each layer will be described in detail.
[0010]
The transparent film layer 11 is a transparent or translucent film layer made of a resin such as PET (polyethylene terephthalate) and PS (polystyrene). The transparent film layer 11 protects the printed layer 12 while making it visible from the surface.
[0011]
The printing layer 12 is provided below the transparent film layer 11 and prints information such as a campaign. Since the transparent film layer 11 is transparent, the user can check the contents of the print layer 12 through the transparent film layer 11. In addition, the transparent film layer 11 and the printing layer 12 constitute a label substrate.
[0012]
The anchor layer 13 is formed by mixing various particles with an ultraviolet-curable epoxy-based, urethane-based, or vinyl-based resin. Examples of the particles include fine particles of φ1 μm to 20 μm typified by silica, ultrafine particles of φ8 to 120 μm typified by aerosil, inorganic fillers, organic fillers, and the like.
[0013]
Therefore, in the present invention, a suitable amount (0.1% to 30%) of particles such as silica, fine particles, ultrafine particles, inorganic fillers or organic fillers is mixed with an ultraviolet curing epoxy, urethane or vinyl resin. I decided to. As a result, an anchoring effect occurs in which the above-mentioned various particles and the resin having good adhesiveness bite into each other and are physically bonded like a chuck, and strong bonding is made between the anchor layer 13 and each layer. You.
[0014]
For this reason, the anchor layer 13 is disposed between the printing layer 12 and the adhesive layer 14 and the two layers are cooperatively adhered so that when the label is peeled off, the adhesive peels off from the label and remains on the release sheet. Can be prevented.
[0015]
The adhesive layer 14 is composed of an adhesive. Examples of the pressure-sensitive adhesive include: (1) a high-volatile content-type pressure-sensitive adhesive capable of reducing the amount of solvent used per unit production of a label by increasing the non-volatile content in the solvent-type pressure-sensitive adhesive; Using water as a medium and emulsifying an adhesive in water instead of dissolving in an organic solvent. Emulsion-type adhesive. (3) Hot-melt type, applying while applying a hot-melt adhesive at a high temperature. An adhesive, (4) a solid adhesive cured at a high temperature is applied by calendering, a solid adhesive, (5) a monomer which is a raw material of the adhesive is polymerized in a state of being applied in a sheet form, UV-polymerizable pressure-sensitive adhesives and the like are conceivable.
[0016]
Here, as the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 14 of the present invention, an ultraviolet curable acrylic hot melt resin is preferable. Further, a normal pressure-sensitive adhesive has a pressure-sensitive adhesive base material, a softening agent, and a tackifier, but no tackifier is added to the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 14 of the present invention.
[0017]
By using an ultraviolet curing type as the adhesive of the adhesive layer 14, the adhesive is cured only by an ultraviolet lamp, and drying is not required. Further, by not adding the tackifier to the adhesive, the adhesive strength of the adhesive layer 14 to the release sheet 20 is not increased more than necessary. For this reason, the label 10 can be easily peeled off from the release sheet 20, and the adhesive of the adhesive layer 14 can be prevented from remaining on the release sheet 20. Some tackifiers such as tackifiers use harmful substances. By not using a tackifier, there is no danger of harm to the environment.
[0018]
The release sheet 20 is configured by laminating a release layer 21 and a release mount 22 from above. The release sheet 20 is formed by forming a release layer 21 made of a silicone release agent on the surface of a release board 22 made of a resin such as PET. Note that an adhesive layer may be formed on the back surface of the release sheet 20, and the label may be attached to an adhesive object such as a PET bottle together with the release sheet.
[0019]
As described above, by disposing the anchor layer 13 between the printing layer 12 and the adhesive layer 14 and not adding the tackifier to the adhesive layer 14, the adhesive of the adhesive layer 14 can be removed from the label. prevent. For this reason, it is possible to prevent the adhesive layer 14 from remaining on the release sheet 20 when the label 10 is peeled off, and to prevent the adhesive layer 14 from being peeled off and reducing the force for attaching the label 10 again.
[0020]
(Other embodiments)
In the embodiment described above, a transparent film having a print layer as a lower layer is used as a label base material, but the present invention is not limited to this, and plain paper or the like may be used as the label base material.
[0021]
【The invention's effect】
As described above, in the present invention, between the label base material and the adhesive layer, an anchor layer for improving the adhesive strength between the label base material and the adhesive layer, the adhesive layer Is characterized by not adding a tackifier.
[0022]
By arranging the anchor layer between the label substrate and the adhesive layer, the adhesiveness between the label substrate and the adhesive layer is improved. Further, since no tackifier is added to the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer does not have an unnecessarily high adhesion to the release sheet. Therefore, it is possible to prevent the pressure-sensitive adhesive layer from remaining on the release sheet when the label is peeled off, and to prevent a decrease in the force of reattaching the label due to the peeling of the pressure-sensitive adhesive layer.
[Brief description of the drawings]
FIG. 1 is a diagram showing a layer structure of a label of the present invention.
[Explanation of symbols]
10 ... label,
11: transparent film layer, 12: printing layer, 13: anchor layer, 14: adhesive layer,
20 ... release sheet,
21 ... release layer, 22 ... release liner

Claims (2)

In a label having a label base material and an adhesive layer, and pasted on a release sheet,
Between the label substrate and the adhesive layer, having an anchor layer for improving the adhesive force between the label substrate and the adhesive layer,
A label, wherein no tackifier is added to the adhesive layer. The label according to claim 1,
The label, wherein the label substrate has a transparent film layer formed on an upper surface and a printed layer formed on a lower surface of the transparent film layer.

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