WO2019188469A1

WO2019188469A1 - Tire label

Info

Publication number: WO2019188469A1
Application number: PCT/JP2019/011061
Authority: WO
Inventors: 田中　孝和
Original assignee: リンテック株式会社
Priority date: 2018-03-26
Filing date: 2019-03-18
Publication date: 2019-10-03

Abstract

A tire label 1 according to the present invention comprises a label substrate 2 and an adhesive layer 3 provided on one side of the label substrate 2. At least a part of the periphery of the label substrate 2 projects outwardly from the adhesive layer 3 in a plan view of the tire label 1. The label substrate 2 has a rectangular shape in the plan view, and it is preferable that the entire periphery of the label substrate 2 projects outwardly from the adhesive layer 3.

Description

Tire label

The present invention relates to a tire label.

A tire label indicating a grade such as rolling resistance performance and wet grip performance is attached to the tread of the tire (see, for example, Patent Document 1).

Such a tire label is composed of a laminate having a label base material and an adhesive layer provided on one surface of the label base material. In the distribution and provision of tire labels, a plurality of tire labels are regularly arranged on a release liner.

The tire tread has a groove for draining water from the road surface. Furthermore, the tire tread is formed with a beard-like projection called “spoo” due to an air vent hole of a mold used at the time of tire molding. As a result, the sticking area of the surface (tread surface) of the tire to which the tire label is stuck is small. For these reasons, in order to satisfactorily adhere the tire label to the tread surface of the tire, it is necessary to design the pressure-sensitive adhesive layer to be relatively soft and thick.

However, a tire label having a relatively soft and thick adhesive layer may cause the following problems. Specifically, in such a tire label, an adhesive is provided via the label base material at the time of production (for example, when the label base material is punched), at the time of winding, at the time of use (at the time of sticking to a tire), etc. Pressure is applied to the layer. This pressure causes a part of the pressure-sensitive adhesive layer to protrude outward from the edge of the label base material. For this reason, for example, when the tire label is wound up in a roll shape, a part of the sticking adhesive layer sticks to the back surface of the release liner, which causes a problem that the tire label becomes difficult to unwind (development failure). Moreover, when sticking a tire label to a tire, the appearance defect of a tire label, etc. arise depending on the extent of this adhesive layer sticking out. From such a problem, it may be difficult to obtain a good adhesion state of the tire label.

Japanese Patent Laid-Open No. 10-147757

An object of the present invention is to provide a tire label capable of preventing the pressure-sensitive adhesive layer from protruding from the label base material at least in a state where the tire label is attached to the tire.

Such an object is achieved by the present invention described in the following (1) to (6).
(1) a label substrate;
A pressure sensitive adhesive layer provided on one side of the label base material, and a tire label comprising:
The tire label according to claim 1, wherein at least a part of an edge of the label base material protrudes outward from the pressure-sensitive adhesive layer in a plan view of the tire label.

(2) The tire according to (1), wherein the label base material has a rectangular shape in a plan view, and the entire periphery of the edge of the label base material protrudes outward from the adhesive layer. label.

(3) The tire label according to (1) or (2), wherein the maximum protrusion amount of the edge of the label base material with respect to the pressure-sensitive adhesive layer is 1 mm or more and 10 mm or less in a plan view of the tire label.

(4) The tire label according to any one of (1) to (3), wherein the pressure-sensitive adhesive layer is made of a hot-melt pressure-sensitive adhesive.

(5) The tire label according to any one of (1) to (4), wherein the pressure-sensitive adhesive layer has a storage elastic modulus at 25 ° C. of 0.005 MPa to 0.2 MPa.

(6) The tire label according to any one of (1) to (5), wherein the pressure-sensitive adhesive layer has a thickness of 10 μm to 100 μm.

According to the present invention, it is possible to provide a tire label that can prevent the pressure-sensitive adhesive layer from protruding from the label base material at least in a state where the tire label is attached to the tire.

FIG. 1 is a side view schematically showing a preferred embodiment of the tire label of the present invention. FIG. 2 is a side view showing a state where the tire label shown in FIG. 1 is attached to the tire. FIG. 3 is a plan view of the tire label shown in FIG. FIG. 4 is a side view for explaining the manufacturing method of the tire label shown in FIG. FIG. 5 is a side view for explaining the manufacturing method of the tire label shown in FIG. 1 and shows a bonding process. FIG. 6 is a side view for explaining the method of manufacturing the tire label shown in FIG. 1 and shows a cutting process. FIG. 7 is a plan view seen from the direction of arrow A in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail.
FIG. 1 is a side view schematically showing a preferred embodiment of the tire label of the present invention. FIG. 2 is a side view showing a state where the tire label shown in FIG. 1 is attached to the tire. FIG. 3 is a plan view of the tire label shown in FIG.

[Tire label]
A tire label 1 shown in FIG. 1 includes a label base material 2 and an adhesive layer 3 provided on one surface (lower surface) side of the label base material 2, and is provided on a release liner 4. In addition, as shown in FIG. 3, in a plan view of the tire label 1 (hereinafter, simply referred to as “plan view”), at least a part of the edge of the label base material 2 (in this embodiment, the entire circumference) is adhered. It protrudes outward from the agent layer 3.

By the way, in the conventional tire label, the pressure-sensitive adhesive layer may protrude outside the label base material in a plan view due to the relatively soft and thick pressure-sensitive adhesive layer. For example, in a state where a conventional tire label is attached to a tire, the pressure-sensitive adhesive layer is crushed in the thickness direction and spreads in the surface direction. Depending on the extent of the spread, the pressure-sensitive adhesive layer may protrude outside the label substrate in plan view.

In the present invention, at least a part of the edge of the label substrate 2 (in the present embodiment, the entire circumference) protrudes outward from the adhesive layer 3 in plan view. Thereby, even if the adhesive layer 3 spreads, for example in a sticking state, it can prevent that the adhesive layer 3 protrudes to the outer side of the label base material 2 in planar view. As a result, the tire label 1 can obtain a good sticking state.

Hereinafter, the tire label 1 will be described in detail.
As shown in FIG. 1, the tire label 1 is attached (laminated) to the release liner 4 before being attached to the tire 10. The tire label 1 is peeled off from the release liner 4 and attached to the tire 10 (see FIG. 2).

<Release liner>
The release liner 4 is a liner material that can be peeled off from the pressure-sensitive adhesive layer 3 and protects the pressure-sensitive adhesive layer 3. Examples of the release liner 4 include a peelable film or a peelable paper.

Examples of the film include polyethylene terephthalate and polypropylene, and examples of the paper include high-quality paper, kraft paper, and glassine paper.

Moreover, it is preferable that silicone or the like is applied to the surface of the release liner 4 so that the pressure-sensitive adhesive layer 3 can be peeled off.

In addition, the thickness of the release liner 4 is preferably 50 μm or more and 250 μm or less, for example, in consideration of handleability. Here, the thickness of the release liner 4 is an average value of thicknesses measured at 10 randomly selected locations.

<Label substrate>
The label base material 2 has a function of supporting the pressure-sensitive adhesive layer 3 and is a part where information such as characters and pictures is displayed on the surface opposite to the pressure-sensitive adhesive layer 3.

Examples of the constituent material of the label substrate 2 include various resin materials, various metal materials, various ceramic materials, and plant materials such as cellulose.

Examples of the resin material include polyolefins such as polyethylene, polypropylene, and ethylene / propylene copolymers; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate; acetate resins, acrylonitrile-butadiene-styrene copolymers ( (ABS) resin, polystyrene, polyvinyl chloride, polyamide, polyesteramide, polyether, polyimide, polyamideimide, poly-p-phenylene sulfide, polyether ester, and the like.
Among these, synthetic paper using polyolefin or polyester is preferable.

Moreover, the label base material 2 may contain components other than those described above. Examples of such components include colorants such as dyes and pigments, antioxidants such as anilides and phenols, modifiers, fillers, heat stabilizers, lubricants, antistatic agents, polymerization inhibitors, and catalysts. , Plasticizers, softeners and the like.
The label substrate 2 may be a laminate including a plurality of layers.

Further, the surface of the label substrate 2 may be subjected to a surface treatment for improving the adhesion with the pressure-sensitive adhesive layer 3.
As such a surface treatment, for example, an oxidation method, a concavo-convex method, or the like can be given.

Examples of the oxidation method include corona discharge treatment (corona treatment), chromic acid treatment (wet), flame treatment, hot air treatment, ozone / ultraviolet irradiation treatment, and the like. Method, solvent treatment method and the like.

These surface treatment methods are appropriately selected according to the material constituting the label substrate 2, but generally corona treatment is preferable from the viewpoints of effects and operability.
The surface of the label substrate 2 can be subjected to primer treatment.

The thickness of the label substrate 2 is not particularly limited, but is preferably 10 μm or more and 500 μm or less, and more preferably 20 μm or more and 100 μm or less.

Further, the label substrate 2 is rectangular in plan view. When the label base material 2 is a square, the length of each side is about 50 mm to 150 mm. On the other hand, when the label substrate 2 is rectangular, the length of the long side is about 50 mm or more and 300 mm or less, and the length of the short side is about 50 mm or more and 150 mm or less.
In addition, when the release liner 4 mentioned above is cut | disconnected simultaneously with a label base material in a cutting process, it is set as the dimension substantially the same as the label base material 2. FIG.

<Adhesive layer>
The pressure-sensitive adhesive layer 3 is composed of a pressure-sensitive adhesive composition containing a pressure-sensitive adhesive as a main component, and has a function of sticking the tire label 1 to the tire 10 and maintaining the state of sticking.

Although it does not specifically limit as an adhesive, A general adhesive can be selected suitably and can be used. That is, the pressure-sensitive adhesive layer 3 can be constituted by a known pressure-sensitive adhesive composition known as a general raw material for a pressure-sensitive adhesive layer. Among these, a hot melt pressure-sensitive adhesive composition containing a hot-melt pressure-sensitive adhesive as a main ingredient is preferable. Here, the hot-melt type pressure-sensitive adhesive refers to a pressure-sensitive adhesive that can be melted and spread-applied by heating, and exhibits adhesiveness and cohesive force when cooled.

By using such a hot-melt pressure-sensitive adhesive composition, the pressure-sensitive adhesive layer 3 can be made relatively thick. Thereby, even if the tread of the tire 10 has water discharge grooves and spews, the pressure-sensitive adhesive layer 3 can maintain a good adhesion state with respect to the surface (tread surface) of the tire 10.

The types of hot melt adhesives that are the main components of hot melt adhesive compositions include, for example, natural rubber adhesives, synthetic rubber adhesives, acrylic adhesives, urethane adhesives, silicone adhesives, etc. And conventionally known types.

The average thickness of the pressure-sensitive adhesive layer 3 is not particularly limited, but is preferably 10 μm or more and 100 μm or less, and more preferably 40 μm or more and 60 μm or less. Thereby, even if the tread of the tire 10 has a water discharge groove or a spew, the pressure-sensitive adhesive layer 3 can maintain a good adhesion state with respect to the surface (tread surface) of the tire 10. .

The pressure-sensitive adhesive layer 3 preferably has a storage elastic modulus at a frequency of 1 Hz at 25 ° C. of 0.005 MPa or more and 0.2 MPa or less, and more preferably 0.01 MPa or more and 0.1 MPa or less. Thereby, the storage elastic modulus of the adhesive layer 3 can be made relatively low. Therefore, even if the tread of the tire 10 has water discharge grooves and spews, the adhesive force of the pressure-sensitive adhesive layer 3 to the tread surface of the tire 10 can be sufficiently increased.

Here, in the conventional tire label, if the pressure-sensitive adhesive layer is made relatively thick or the storage elastic modulus is lowered as in the case of the pressure-sensitive adhesive layer 3, the tire label is poor in appearance and rolled. Problems such as poor deployment may occur. For example, a part of the pressure-sensitive adhesive layer protrudes outward from the label base material depending on the pressure or the like when sticking the tire label on the tread surface of the tire. Depending on the degree of protrusion of the pressure-sensitive adhesive layer, the appearance of the tire label may be poor. From such a problem, it may be difficult to obtain a good adhesion state of the tire label.

Therefore, in the tire label 1, as shown in FIG. 3, the entire periphery of the edge 20 of the label base 2 protrudes outward from the entire periphery of the edge of the adhesive layer 3 in a plan view. That is, the entire circumference of the edge portion of the pressure-sensitive adhesive layer 3 is in a state of being located inside the label substrate 2 in a plan view in a state where it is not yet attached to the tire 10. In other words, it can be said that the tire label 1 has an adhesive-free portion 21 in which the adhesive layer 3 is omitted on the entire periphery of the edge portion of the label substrate 2.

Thereby, even if the thickness of the pressure-sensitive adhesive layer 3 and the storage elastic modulus of the pressure-sensitive adhesive layer 3 are set in the above-described range, the pressure-sensitive adhesive layer 3 can be prevented from protruding from the label base material 2. For example, as shown by a two-dot chain line in FIG. 3, even when the pressure-sensitive adhesive layer 3 is crushed in the thickness direction and spreads in the surface direction in the attached state of the tire label 1, the edge of the pressure-sensitive adhesive layer 3 The entire circumference of the part can be located inside the label substrate 2 in plan view. That is, it is possible to prevent the pressure-sensitive adhesive layer 3 from protruding from the label substrate 2. As a result, it is possible to prevent unsatisfactory development and appearance failure of the tire label 1 due to the pressure-sensitive adhesive layer 3 protruding from the label base material 2, and maintain a good adhesion state of the tire label 1.

In particular, as described above, when the tire label 1 is used by being attached to a tire as follows, a more remarkable effect can be exhibited as compared with the conventional product. That is, when a tire tread has a water discharge groove and a beard-like projection called “Spoo” is formed on the tread surface, a hot melt pressure-sensitive adhesive composition is used, and a pressure-sensitive adhesive layer is used. 3 must be set relatively thick, and the storage elastic modulus of the pressure-sensitive adhesive layer 3 needs to be set relatively low. It can be said that such an adhesive layer 3 is easily protruded from the label substrate 2. However, the tire label 1 having the above-described configuration can prevent the pressure-sensitive adhesive layer 3 from protruding from the label substrate 2. Therefore, when the tire label 1 is attached to the tire as described above, the effect becomes more remarkable than the conventional product.

In plan view, the maximum protrusion amount of the label substrate 2 with respect to the pressure-sensitive adhesive layer 3 is preferably 1 mm or more and 10 mm or less, and more preferably 2 mm or more and 9 mm or less. Thereby, even if the thickness of the pressure-sensitive adhesive layer 3 and the storage elastic modulus of the pressure-sensitive adhesive layer 3 are set in the above-described ranges, the protrusion of the pressure-sensitive adhesive layer 3 can be more effectively prevented.

If the maximum protrusion amount is too large, the label base material 2 tends to be relatively large. On the other hand, if the maximum protrusion amount is too small, the effect of the present invention may not be obtained sufficiently remarkably.

The “projection amount” refers to the distance between the edge of the pressure-sensitive adhesive layer 3 and the edge of the label substrate 2 in plan view. Therefore, in the tire label 1, at least a part of the edge of the label base 2 protrudes outward from the edge of the pressure-sensitive adhesive layer 3 closest to the edge of the label base 2 in plan view. It can be said that it has the structure which has. The “maximum protrusion amount” refers to the protrusion amount having the maximum value among the protrusion amounts on the entire circumference of the edge portion of the pressure-sensitive adhesive layer 3 or the label substrate 2.

When the area of the label substrate 2 in plan view is A (cm ² ) and the area of the pressure-sensitive adhesive layer 3 in plan view is B (cm ² ), B / A is 0.36 or more and 0 Is preferably .98 or less, more preferably 0.50 or more and 0.90 or less. Thereby, the effect of this invention can fully be exhibited.

Next, a method for manufacturing the tire label 1 will be described.
FIG. 4 is a side view for explaining the manufacturing method of the tire label shown in FIG. FIG. 5 is a side view for explaining the manufacturing method of the tire label shown in FIG. 1 and shows a bonding process. FIG. 6 is a side view for explaining the method of manufacturing the tire label shown in FIG. 1 and shows a cutting process. FIG. 7 is a plan view seen from the direction of arrow A in FIG.

The manufacturing method of the tire label 1 includes a preparation process for preparing the release liner 4 and the like, an application process for applying the pressure-sensitive adhesive composition on the release liner 4, and a bonding process for bonding the label substrate 2 to the pressure-sensitive adhesive composition. And a cutting step of cutting the label substrate 2.

[Preparation process]
First, the release liner 4 shown in FIGS. 4 to 7 is prepared. Moreover, the adhesive composition and the label base material 2 which have a hot-melt-type adhesive as the main ingredient are prepared.

[Coating process]
Next, as shown in FIG. 4, the pressure-sensitive adhesive composition 3 is formed by applying the heat-melted pressure-sensitive adhesive composition to a plurality of locations on the release liner 4 with predetermined intervals. In the configuration shown in the figure, the adhesive composition is applied in a plurality of locations in a matrix. Thereby, on the release liner 4, the some adhesive layer 3 is formed in matrix form.

In addition, the separation distance of the applied pressure-sensitive adhesive composition, that is, the separation distance between adjacent pressure-sensitive adhesive layers 3 is preferably 5 mm or more and 100 mm or less, and more preferably 10 mm or more and 40 mm or less. Thereby, the tire label 1 which has the pasteless part 21 can be reliably formed through the following processes.

In FIG. 7, the distance between the pressure-sensitive adhesive layers 3 adjacent in the vertical direction and the distance between the pressure-sensitive adhesive layers 3 adjacent in the left-right direction may be the same or different. In addition, each of the separation distances between the pressure-sensitive adhesive layers 3 adjacent in the vertical direction may be the same as or different from each other. Moreover, each of the separation distances between the pressure-sensitive adhesive layers 3 adjacent in the left-right direction may be the same as or different from each other.

As a coating apparatus used in this step, a slit die is preferable because the pressure-sensitive adhesive layer can be formed into a plurality of rectangles.

As described above, when a hot-melt pressure-sensitive adhesive composition is used as the pressure-sensitive adhesive composition, the pressure-sensitive adhesive composition can be applied on the release liner 4 relatively thickly. Furthermore, since the drying step can be omitted, the productivity is excellent.

[Lamination process]
Next, as shown in FIG. 5, the label substrate 2 is bonded from the side of the release liner 4 to which the pressure-sensitive adhesive composition is applied, that is, the pressure-sensitive adhesive layer 3 side.

[Cutting process]
Next, as shown in FIG. 6, for example, using a known cutting device (for example, a die cutting machine), only the label base material 2 is made a rectangular shape at a predetermined distance from the edge of the rectangular pressure-sensitive adhesive layer 3. Cut (half cut). Thereafter, the outer lattice portion (so-called residue portion) of the rectangular label substrate 2 is removed. Thereby, as shown in FIG. 7, the tire label 1 which has the pasteless part 21 can be formed.

Moreover, it can prevent that an adhesive composition adheres to the blade of a cutting device by cut | disconnecting the part of the label base material 2 in which the adhesive layer 3 is not formed in the lower side.
The tire label 1 can be manufactured through the above steps.

It is also possible to use a pressure-sensitive adhesive composition mainly composed of a pressure-sensitive adhesive other than the hot-melt pressure-sensitive adhesive (for example, a solvent-type or water-dispersed pressure-sensitive adhesive). For example, when applying a pressure-sensitive adhesive composition mainly composed of a water-dispersed pressure-sensitive adhesive, it is common to form a plurality of strip-shaped pressure-sensitive adhesive layers separated from each other in the width direction of the release liner. For this reason, it is difficult to form the non-glue part 21 in the direction intersecting with the direction in which the pressure-sensitive adhesive layer extends. On the other hand, by using a hot-melt adhesive, as shown in FIG. 7, the adhesive composition is applied to a plurality of portions of the release liner 4 to form the rectangular adhesive layer 3 in a matrix. can do. For this reason, the tire label 1 having the non-glue portion 21 on the entire circumference of the edge of the label substrate 2 can be easily formed. Needless to say, a tire label having a configuration in which at least a part of the edge of the label base material protrudes outward from the pressure-sensitive adhesive layer can also be obtained by using a hot-melt type pressure-sensitive adhesive.
Moreover, you may cut | disconnect a peeling liner simultaneously with a label base material in a cutting process.

The preferred embodiments of the present invention have been described above, but the present invention is not limited to these.

For example, the tire label may have at least one intermediate layer between the label base material and the pressure-sensitive adhesive layer. For example, the tire label may have an adhesion enhancing layer (such as a primer layer).

In the above embodiment, the entire circumference of the edge of the label base material protrudes outward from the pressure-sensitive adhesive layer. However, the present invention is not limited thereto, and at least the edge of the label base material. The effect of the present invention can be obtained as long as a portion projects outward from the pressure-sensitive adhesive layer.

In the above embodiment, the label base material has a rectangular shape. However, the present invention is not limited to this. For example, the label base material may have any shape such as a triangle, a pentagon or more polygon, a circle, and an ellipse. Good.

According to the present invention, it is possible to provide a tire label that can prevent the pressure-sensitive adhesive layer from protruding from the label base material at least in a state where the tire label is attached to the tire. Therefore, the present invention has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Tire label 2 Label base material 3 Adhesive layer 4 Release liner 10 Tire 20 Edge part 21 No paste part

Claims

A label substrate;
A pressure sensitive adhesive layer provided on one side of the label base material, and a tire label comprising:
The tire label according to claim 1, wherein at least a part of an edge of the label base material protrudes outward from the pressure-sensitive adhesive layer in a plan view of the tire label.
The tire label according to claim 1, wherein the label base material has a rectangular shape in a plan view, and the entire periphery of the edge of the label base material protrudes outward from the adhesive layer.
The tire label according to claim 1 or 2, wherein, in a plan view of the tire label, a maximum protrusion amount of the edge portion of the label base material with respect to the pressure-sensitive adhesive layer is 1 mm or more and 10 mm or less.
The tire label according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive layer is formed of a hot-melt pressure-sensitive adhesive.
The tire label according to any one of claims 1 to 4, wherein the pressure-sensitive adhesive layer has a storage elastic modulus at 25 ° C of 0.005 MPa to 0.2 MPa.
The tire label according to any one of claims 1 to 5, wherein the pressure-sensitive adhesive layer has a thickness of 10 µm to 100 µm.