JP6317395B2 - label - Google Patents

Description

The present invention relates to a technique for easily peeled off label.

Conventionally, a label sheet is known in which the leading edge of a resin label is cured by coating or printing so that the label can be reliably peeled off from the release paper when a label peeling machine is used (for example, patent document) 1).
However, it is difficult to completely cure the pressure-sensitive adhesive by coating or printing, and when the label peeling machine is used, the label may not be peeled from the release paper.
Therefore, a technique for easily peeling the label has been demanded.

Japanese Patent Laid-Open No. 09-197971

The present invention has been made to solve such problems, and an object thereof is to provide a label that can be easily peeled off .

  According to an aspect of the present invention, there is provided a label including a base sheet, an adhesive layer formed on the base sheet, and a cured layer formed on a part of the adhesive layer, The remaining part excluding the part of the pressure-sensitive adhesive layer exposes the pressure-sensitive adhesive, and the cured layer is provided with a label obtained by curing an acrylic adhesive on the pressure-sensitive adhesive layer.

  According to the said aspect, the label which can be peeled easily is provided.

It is a figure which shows the label of Embodiment 1, Comprising: (a) is a top view, (b) is a side view. It is a figure which shows the label of Embodiment 2, Comprising: (a) is a top view, (b) is a side view. It is a figure which shows the label of Embodiment 3, Comprising: (a) is a top view, (b) is a side view. The flowchart which shows the manufacturing method of this invention

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  The label of the present invention has a base sheet, an adhesive layer formed on the base sheet, and a cured layer formed on a part of the adhesive layer. A system adhesive is cured.

(Embodiment 1)
1A and 1B are diagrams showing a label of Embodiment 1, in which FIG. 1A is a plan view and FIG. 1B is a side view.
10 is a label of Embodiment 1, 11 is a base material sheet, 12 is an adhesive layer, 13 is a hardened layer.

The base sheet 11 is made of paper such as fine paper, coated paper, art paper, polyolefin resin such as polyethylene and polypropylene, polyester (polyethylene terephthalate) resin, polycarbonate resin, polyvinyl chloride, and chlorinated polychlorination obtained by further chlorinating this. A film made of a vinyl chloride resin such as vinyl, a synthetic paper obtained by adding a filler to polyethylene or polypropylene and processing it into a fiber like paper, and a laminate or composite material of these are used.
The substrate sheet 11 may be laminated.
Generally, the base material sheet 11 is printed with a product name, a manufacturer name, a tire size, a type, a flatness ratio, and data obtained by bar code display.

The pressure-sensitive adhesive forming the pressure-sensitive adhesive layer 12 is not particularly limited, and for example, an emulsion-based, solvent-based, or hot-melt pressure-sensitive adhesive is used. The material is arbitrary such as acrylic or rubber. The adhesive property is selected according to the kind of the adherend. For example, when it is not necessary to peel off after sticking once, there are strong adhesive, super strong adhesive having higher adhesive strength, frozen paste, and the like. For a label to be attached to a tire, a rubber-based adhesive that is compatible with the tire is preferable.
Moreover, as thickness of the adhesive layer 12, 10 micrometers or more and 60 micrometers or less are preferable. In the label affixed to a tire, 40 micrometers or more and 60 micrometers or less are preferable so that it may adhere to an uneven surface firmly.

  The cured layer 13 is obtained by curing an acrylic adhesive.

As the acrylic adhesive used in the present invention, for example, an active energy ray-curable composition mainly composed of (meth) acrylate is preferable. Examples of active energy rays include electron beams, visible rays, and ultraviolet rays.
Further, it may be based on acrylic and may contain additives such as a photopolymerization initiator, a polymerization inhibitor, a thickener, a plasticizer, and a colorant.
The acrylic adhesive used in the present invention is preferably a radically polymerizable ultraviolet curable composition that is easy to handle for convenience of application and curing on the pressure-sensitive adhesive layer.
For example, trade name “Aronix (R)” manufactured by Toagosei Co., Ltd.
The acrylic adhesive can be applied to the pressure-sensitive adhesive layer and irradiated with ultraviolet rays to cure the acrylic adhesive and the pressure-sensitive adhesive layer thereunder, thereby forming a cured layer 13.

The cured layer 13 is formed on a part of the pressure-sensitive adhesive layer 12.
The cured layer 13 preferably has a thickness equivalent to that of the pressure-sensitive adhesive layer 12.
Specifically, the thickness of the cured layer 13 is preferably 10 μm or more and 60 μm or less, and in the label attached to the tire, the thickness of the cured layer 13 is preferably 40 μm or more and 60 μm or less.
By providing the thick adhesive layer 12 with a sufficient thickness, the adhesive layer 12 can be reliably peeled off from the mount.

In the present invention, a process of using printing ink, varnish or the like to weaken the adhesive force is applied to a hardened layer by applying a strong adhesive based on the opposite idea to form a hardened layer.
The cured layer of the present invention is an already cured adhesive and pressure-sensitive adhesive. Accordingly, the adhesive force is completely lost and can be easily peeled off from the mount, so that it can be attached to the tire with an automatic sticking machine.

As shown in FIG. 1, the cured layer 13 is preferably formed on the entire circumference of the pressure-sensitive adhesive layer 12.
By forming the hardened layer 13 on the entire circumference of the pressure-sensitive adhesive layer 12, the label 10 can be easily peeled from any direction when the label 10 is peeled off from a release sheet to be described later.
The cured layer 13 is preferably cured integrally with a part of the pressure-sensitive adhesive layer 12 below the cured layer 13 as shown in FIG.
By partially curing the cured layer 13 and the pressure-sensitive adhesive layer 12, it is possible to prevent the pressure-sensitive adhesive from leaking out.
Moreover, when the hardened layer is formed in the cut surface at the time of cutting a label, the adhesion of the adhesive from the cut surface can be prevented.

The label of the present invention can have an aluminum vapor deposition surface between the base sheet 11 and the pressure-sensitive adhesive layer 12. The aluminum vapor-deposited surface blocks the penetration of sulfur and the like from the tire into the base sheet 11, and further strengthens the label protection to prevent deterioration.
Of course, the use of the label is not limited to this, and the present invention can be applied to label sheets in general.

The label of this invention can be equipped with the peeling sheet laminated | stacked on the adhesive layer 12 and the hardened layer 13 so that peeling is possible.
As the release sheet, a generally used release sheet is used. For example, paper with silicone coated on the surface through a polyethylene film, kraft paper, glassine paper, high-quality separators, various plastic films, etc., coated with super calender after clay coating are exemplified.

(Embodiment 2)
2A and 2B are diagrams showing a label of Embodiment 2, in which FIG. 2A is a plan view and FIG. 2B is a side view.
20 is a label of Embodiment 2, 11 is a base material sheet, 12 is an adhesive layer, and 23 is a cured layer.
The label 20 of Embodiment 2 has a hardened layer 23 provided on one side of the label.
Since it can peel easily from a base_sheet | mounting_paper by the hardened layer 23, the sticking to the tire by an automatic sticking machine is attained.

(Embodiment 3)
3A and 3B are diagrams showing a label of Embodiment 3, in which FIG. 3A is a plan view and FIG. 3B is a side view.
30 is a label of Embodiment 3, 11 is a base material sheet, 12 is an adhesive layer, 33 is a hardened layer.
In the label 30 of the third embodiment, the hardened layer 33 is provided at the corner of the label.
Since it can be easily peeled off from the mount by the hardened layer 33, it can be attached to a tire by an automatic sticking machine.

(Production method)
The label production method of the present invention includes a pressure-sensitive adhesive application step in which a pressure-sensitive adhesive is applied to a base sheet to form a pressure-sensitive adhesive layer, an adhesive application step in which an adhesive is applied to the pressure-sensitive adhesive layer, a pressure-sensitive adhesive layer, and adhesion And a hardened layer forming step of curing the agent by irradiating active energy rays.
This will be described with reference to FIG.
FIG. 4 is a flowchart showing the manufacturing method of the present invention.
First, a base sheet is prepared.
In S1, an adhesive is applied onto the substrate sheet by a coating machine, a color changing machine, a printing machine, a brush, a bar coater, and the like, and dried to form an adhesive layer (adhesive application step).
Next, in S2, an adhesive is applied onto the pressure-sensitive adhesive layer by a color changing machine, a printing machine, or the like (adhesive application step).
Then, in S3, the adhesive layer and the adhesive are cured by irradiating active energy rays such as ultraviolet rays (cured layer forming step).
As described above, the label of the present invention can be manufactured.

Examples of the present invention will be described in detail below.
The inventors conducted the following experiment.

[Example 1]
A base sheet (trade name “PET75k2424 / PT3 / 8KA”, 85 mm × 85 mm, thickness 75 μm, manufactured by Lintec Corporation) was prepared.
On the base sheet, a pressure-sensitive adhesive (product name “PT3”, rubber-based pressure-sensitive adhesive, manufactured by Lintec Corporation) is applied and dried to a thickness of 40 μm using a commercially available coating machine. Formed.
Then, a radically polymerizable adhesive (trade name “Aronix LCR0239F”, manufactured by Toagosei Co., Ltd.) is mixed with a medium for flexographic printing so that the entire circumference of the pressure-sensitive adhesive layer is 4 mm wide and 40 μm thick. It apply | coated with the color machine and irradiated with the ultraviolet-ray and formed the hardened layer.
Thus, the label of Example 1 was produced.

[Example 2]
Commercially available color changing machine by mixing a radical polymerizable adhesive (trade name “Aronix LCR0239F” manufactured by Toagosei Co., Ltd.) with flexo printing medium so that the width of the adhesive layer is 4 mm and the thickness is 40 μm on one side. Was applied and irradiated with ultraviolet rays to form a cured layer.
The label of Example 2 was manufactured in the same manner as in Example 1 except for the above conditions.

[Comparative Example 1]
A varnish (trade name “UP200”, manufactured by TOKA Co., Ltd.) was printed with a commercially available color changing machine so as to have a width of 4 mm and a thickness of 40 μm on the entire circumference of the pressure-sensitive adhesive layer. A weak adhesive part was formed.
Other conditions were the same as in Example 1, and a label for Comparative Example 1 was produced.

  Table 1 shows the main conditions of Examples and Comparative Examples.

(Evaluation)
<Automatic bonding test>
The labels of the examples and comparative examples were automatically pasted on a commercially available tire under the trade name “Tough Arm” manufactured by Sato Co., Ltd., and it was visually confirmed whether or not glue accumulation occurred on the suction plate.
○: No glue accumulation occurred on the suction plate ×: Adhesion accumulation occurred on the suction plate

<Exudation of adhesive>
The labels of Examples and Comparative Examples were attached to commercially available tires and left for 7 days in an environment of a temperature of 40 ° C. and a humidity of 80% RH.
And the sticking state was observed visually and it was confirmed whether the adhesive was exuding from the cut surface.
○: No exudation ×: With exudation

As can be seen from Table 2, in Example 1 and Example 2, good results could be obtained for the automatic sticking test and the bleeding of the adhesive from the cut surface.
On the other hand, in Comparative Example 1, there were practical problems with respect to the automatic sticking test and the bleeding of the adhesive from the cut surface.

  In addition, the following can be included as an aspect of this invention.
1. A base sheet, an adhesive layer formed on the base sheet, and a cured layer formed on a part of the adhesive layer;
The cured layer is a label obtained by curing an acrylic adhesive.
2. 2. The label according to 1, wherein the cured layer is integrally cured with a part of the pressure-sensitive adhesive layer under the cured layer.
3. 2. The label according to 1, wherein the acrylic adhesive is a radical polymerizable ultraviolet curable composition.
4). 2. The label according to 1, wherein the cured layer has a thickness of 40 μm or more and 60 μm or less.
5. The label according to 1, wherein the cured layer is formed on the entire circumference of the pressure-sensitive adhesive layer.
6). The label according to 1, wherein the pressure-sensitive adhesive layer is a rubber-based pressure-sensitive adhesive.
7). The label according to 1, wherein the pressure-sensitive adhesive layer has a thickness of 40 μm or more and 60 μm or less.
8). A pressure-sensitive adhesive application step of forming a pressure-sensitive adhesive layer by applying a pressure-sensitive adhesive to the base sheet;
An adhesive application step of applying an adhesive to the pressure-sensitive adhesive layer;
A cured layer forming step of irradiating and curing the adhesive layer and the adhesive with active energy rays;
A method for producing a label.

10, 20, 30 Label 11 Base sheet 12 Adhesive layer 13, 23, 33 Hardened layer

Claims (4)

A label comprising a base sheet, an adhesive layer formed on the base sheet, and a cured layer formed on a part of the adhesive layer,
The remaining part excluding the part of the pressure-sensitive adhesive layer has the pressure-sensitive adhesive exposed,
The cured layer is a label obtained by curing an acrylic adhesive on the pressure-sensitive adhesive layer. The label according to claim 1,
A label further comprising a release paper sheet laminated on the pressure-sensitive adhesive layer and the cured layer. The label according to claim 1 or 2,
The label in which the said hardened layer is formed including at least one part of the outer edge of the said adhesive layer. The label according to any one of claims 1 to 3 ,
The acrylic adhesive is a label that is a radical polymerizable ultraviolet curable composition.

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