Tack sheet

Abstract

To provide a tack sheet capable of reducing waste generated during use.SOLUTION: A tack sheet 1 has a base layer 2, an adhesion layer 3 provided on the outermost surface of one side of the base layer 2, and a peeling properties-imparting layer 4 with peeling properties provided on the outermost surface of the other side of the base layer 2. The adhesion layer 3 is provided with an adhesive layer 3a having adhesive properties formed on the outermost surface of the one side of the base layer 2, and a plurality of convex parts 3b with adhesion properties provided on the surface of the adhesive layer 3a opposite the base layer 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tuck sheet. [Background technology]

[0002] Conventionally, a tack sheet (decorative tack sheet) has been known in which a plastic film or the like is used as a substrate, an adhesive layer is provided on one side of the substrate, and a picture pattern layer or the like is provided on the other side. In such a tack sheet, the adhesive layer side is covered with release paper, and when the tack sheet is adhered to a substrate such as a metal plate or plaster board, the release paper is peeled off and the exposed adhesive layer side is attached to the substrate, and the tack sheet is used for various purposes such as the interior and exterior decoration of buildings and building materials.

[0003] Also, a tack sheet has been proposed in which low-adhesive convex portions are provided on the adhesive layer side of the tack sheet, and the convex portions are brought into contact with the substrate or the like to be bonded to perform positioning. After positioning, the tack sheet is pressed so that the entire surface of the adhesive layer is brought into contact with the substrate or the like to be bonded to for strong adhesion, thereby enabling fine adjustments (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6227820 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, in a tack sheet with an adhesive layer, a release paper is provided on the adhesive layer side. This release paper becomes waste after the tack sheet is attached to a substrate or the like. For example, in the case of a polyvinyl chloride tack sheet for construction, the release paper accounts for about 28% by weight. Since it is difficult to recycle this release paper, it is almost always incinerated as industrial waste. Therefore, against the background of recent environmental problems, improvement is desired.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a tuck sheet that can reduce waste generated during use. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a tack sheet having a base layer, an adhesive layer provided on the outermost surface of one side of the base layer, and a release property-imparting layer having release properties provided on the outermost surface of the other side of the base layer, wherein the adhesive layer comprises an adhesive layer formed on the outermost surface of one side and having adhesive properties, and a plurality of adhesive convex portions provided on the surface of the adhesive layer opposite the base layer. Effect of the Invention

[0008] According to one aspect of the present invention, it is possible to reduce waste generated when using a tuck sheet. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view showing a schematic example of a tack sheet according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Next, an embodiment of the present invention will be described below with reference to the drawings. Here, the drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each layer, etc. differ from the actual ones. Furthermore, the embodiments shown below are examples of configurations for embodying the technical idea of ​​the present invention, and the technical idea of ​​the present invention is not limited to the materials, shapes, structures, etc. of the components described below. The technical idea of ​​the present invention can be modified in various ways within the technical scope defined by the claims.

[0011] <Tack sheet configuration> FIG. 1 is a cross-sectional view showing a schematic example of a tack sheet 1. As shown in FIG. The tack sheet 1 comprises a base layer 2, an adhesive layer 3 formed on one side (hereinafter also referred to as side A) of the base layer 2, and a peelability-imparting layer 4 formed on the other side (hereinafter also referred to as side B) of the base layer 2. The base layer 2 is a layer that serves as the base material of the tack sheet 1, and may be a layer made of paper, a plastic film, or the like, or may be a single-layer structure or a laminate in which multiple layers are laminated.

[0012] The adhesive layer 3 includes an adhesive layer 3a and a protrusion 3b. The adhesive layer 3a may be made of any component capable of adhering the tack sheet 1 to a member to which the tack sheet 1 is to be adhered (hereinafter also referred to as an adhesion target member), and may be made of, for example, an acrylic adhesive. The adhesive layer 3a may contain additives such as a plasticizer, a stabilizer, a filler lubricant, a colorant, an ultraviolet absorber, an antioxidant, and a colorant.

[0013] The protrusions 3b are provided in a stripe pattern on the surface of the pressure-sensitive adhesive layer 3a opposite to the base layer 2. The protrusions 3b are formed using various printing methods such as gravure printing and offset printing, and a material for the protrusions 3b is printed so as to extend parallel to the transport direction of the base layer 2, thereby forming a plurality of stripe-shaped protrusions 3b extending in the transport direction. The protrusions 3b are formed so that the thickness from the surface of the pressure-sensitive adhesive layer 3a is uniform, so that all of the protrusions 3b come into contact with the object of adhesion.

[0014] When the protrusions 3b are provided in a stripe pattern, the protrusions 3b can be formed relatively easily by a printing method, but the method is not limited to this. The protrusions 3b may be provided in a uniform pattern on the entire surface of the pressure-sensitive adhesive layer 3a opposite the base layer 2, and may be curved, broken lines, or dots, and may be arranged in any position and shape.

[0015] The protrusions 3b may be formed of any adhesive component, such as acrylic copolymer particles and a tackifier. The protrusions 3b are formed, for example, by applying a liquid mixture of an acrylic copolymer emulsion and a tackifier that is solid at room temperature to the adhesive layer 3a and drying it. Furthermore, the protrusions 3b are formed so that a certain degree of adhesive strength can be exhibited by bringing only the protrusions 3b into contact with the member to be adhered, and the protrusions 3b can be easily peeled off.

[0016] On the other hand, the adhesive layer 3a is formed so that the adhesive strength when the adhesive layer 3a is brought into contact with the member to be adhered is strong enough to firmly adhere the tack sheet 1 to the member to be adhered. In addition, when the adhesive layer 3 is in contact with the member to be adhered and the tack sheet 1 is not pressed toward the member to be adhered, only the convex portion 3b contacts the member to be adhered, and when the tack sheet 1 is pressed toward the member to be adhered, the convex portion 3b is crushed and buried in the adhesive layer 3a, so that the adhesive layer 3a and the convex portion 3b exert an adhesive strength between the member to be adhered and the adhesive layer 3. In other words, when the tack sheet 1 is not pressed, the adhesive layer 3 exerts a relatively small adhesive strength by the convex portion 3b, which is strong enough to be easily peeled off, and when the tack sheet 1 is pressed, the adhesive layer 3 exerts a larger adhesive strength by the adhesive layer 3a and the convex portion 3b.

[0017] The release-imparting layer 4 may be any layer that has been subjected to a release treatment, and may be formed, for example, of a resin layer in which silicone is added to acrylic urethane. Here, silicone is added to acrylic urethane, but a fluororesin may be added instead of silicone. Here, the case where the peelability-imparting layer 4 is formed on the surface B of the base layer 2 has been described, but the present invention is not limited to this. One or more layers, such as a picture printed layer or other functional layers, may be provided on the surface B of the base layer 2. In this case, the peelability-imparting layer 4 may be formed on the outermost surface of the surface B of the base layer 2.

[0018] Similarly, the adhesive layer 3 is not limited to being formed on side A of the base layer 2, and one or more functional layers may be provided on side A of the base layer 2, in which case the adhesive layer 3 may be formed on the outermost surface of the side A of the base layer 2.

[0019] <Effects of this embodiment> (1) In the case of the tuck sheet 1 of this embodiment, when the tuck sheet 1 is wound to form a roll, the tensile strength when the tuck sheet 1 is wound can be adjusted so that if the tuck sheet 1 is wound with the convex portion 3b on the inside, the nth (n is an integer) peelability-imparting layer 4 and the n+1th convex portion 3b will come into contact, and if the tuck sheet 1 is wound with the convex portion 3b on the outside, the nth convex portion 3b and the n+1th peelability-imparting layer 4 will come into contact, so that the adhesive layer 3a and the peelability-imparting layer 4 will not adhere to each other.

[0020] Here, if the tack sheet 1 is rolled up without providing a release paper, the tack sheets 1 will come into contact with each other. However, even if, for example, the nth peelability-imparting layer 4 of the tack sheet 1 comes into contact with the (n+1)th protrusion 3b, the adhesive force between the peelability-imparting layer 4 and the protrusion 3b is relatively small, and therefore it is possible to prevent the peelability-imparting layer 4 and the protrusion 3b from strongly adhering to each other. When the tack sheet 1 is used, the adhesive layer 3 is exposed by unrolling the tack sheet 1 from the roll, and the tack sheet 1 can be directly adhered to the object of adhesion. In other words, the peelability-imparting layer 4 serves as a release paper that covers the adhesive surface of the adhesive layer 3, so that the tack sheets 1 in the rolled tack sheet 1 can be prevented from adhering to each other without providing a release paper. Since no release paper is required, waste generated when using the tack sheet 1 can be reduced, and the tack sheet 1 can be realized as an environmentally friendly product.

[0021] Furthermore, since the tack sheet 1 can be obtained in this manner without release paper, when it is applied to, for example, non-flammable decorative panels for interior use or PVC tack sheets, etc., there is no need to bother peeling off or disposing of the release paper, thereby improving workability during construction.

[0022] (2) In addition, when the tack sheet 1 is wound to form a roll, the tensile strength when the tack sheet 1 is wound can be adjusted so that, for example, only the n-th peelability-imparting layer 4 of the tack sheet 1 and the n+1-th protrusion 3b come into contact, and the adhesive layer 3a does not come into contact with the peelability-imparting layer 4. Therefore, even if the n-th part and the n+1-th part of the tack sheet 1 come into contact, they are only in contact with the peelability-imparting layer 4 and the protrusion 3b, and the adhesive force is smaller than when the entire adhesive layer 3 comes into contact with the peelability-imparting layer 4. As a result, when the roll-shaped tack sheet 1 is fed, even if the peelability-imparting layer 4 and the protrusion 3b are adhered to each other, the adhesive force is relatively small, so that the tack sheet 1 can be easily peeled off in the roll, and the tack sheet 1 can be easily fed from the roll.

[0023] (3) In addition, when the tack sheet 1 is adhered to the member to be adhered, if only the protrusions 3b are in contact with the member to be adhered, the adhesive force in this state is relatively small. Therefore, the tack sheet 1 can be easily peeled off. In other words, the tack sheet 1 can be easily attached and detached, so that the positioning adjustment can be easily performed. In addition, after the positioning is completed, the tack sheet 1 can be pressed toward the member to be adhered to bring the adhesive layer 3a into contact with the member to be adhered, and not only the protrusions 3b but also the adhesive layer 3a can be brought into contact with the member to be adhered. Therefore, a larger adhesive force can be exerted compared to when only the protrusions 3b are in contact with the member to be adhered, and the tack sheet 1 can be firmly adhered to the member to be adhered. EXAMPLES

[0024] Examples and comparative examples of the tack sheet according to the present invention will be described below. Note that the present invention is not limited to the following examples.

[0025] Example 1 In Example 1, a tuck sheet was prepared according to the following procedure. A PP (polypropylene)-based base material was used as the base material layer. Specifically, a member in which a polypropylene clear sheet and a polypropylene printed sheet were bonded together was used as the base material.

[0026] A release layer was formed on the surface of the printed polypropylene sheet side as the outermost layer on one side of the base layer. The release layer was made of an acrylic urethane resin with silicone added, and was applied to a thickness of 6 μm. An adhesive layer was formed on the surface of the polypropylene clear sheet side as the outermost layer on the other side of the base layer. First, an acrylic adhesive was applied to the entire surface of the polypropylene clear sheet side to form an adhesive layer. Next, a material obtained by mixing acrylic copolymer particles and a tackifier was printed in stripes on the adhesive layer to form convex portions. The adhesive layer was formed so that the total thickness of the adhesive layer and the convex portions was 70 μm.

[0027] This resulted in a tack sheet in which a peelability-imparting layer was formed on the surface of the base layer facing the polypropylene printed sheet, an adhesive layer was formed on the surface facing the polypropylene clear sheet, and striped convex portions were formed on the surface of the adhesive layer opposite the polypropylene clear sheet. Then, 200 m of this tuck sheet was wound up to obtain a roll of the tuck sheet.

[0028] Example 2 A roll of a tack sheet was obtained in the same manner as in Example 1, except that a resin in which a fluororesin was added to an acrylic urethane resin was used as the peelability-imparting layer.

[0029] Comparative Example 1 A roll of a tack sheet was obtained in the same manner as in Example 1, except that no protrusions were provided and only an adhesive layer was formed as the adhesive layer.

[0030] Comparative Example 2 A roll of a tack sheet was obtained in the same manner as in Example 1, except that instead of the peelability-imparting layer, an acrylic urethane resin alone was used without adding silicone, and a resin was applied to a thickness of 6 μm.

[0031] <Evaluation method and criteria> The tack sheets of the examples and comparative examples prepared as described above were subjected to performance evaluation. The evaluation method and evaluation criteria were as follows.

[0032] (Blocking property) The tack sheets were left stacked for 24 hours, and when they were peeled away from each other, those that could be peeled off without any problem were marked "O", and those that were stuck together and could not be peeled off, or those whose adhesive layer was destroyed were marked "X".

[0033] (Workability) When the tape was attached to the application surface once and then peeled off, those that peeled off without any problem were marked "O", and those that did not peel off or whose adhesive layer was destroyed were marked "X".

[0034] (Evaluation Results) The evaluation results for each decorative sheet are as shown in Table 1 below.

[0035] [Table 1]

[0036] The tack sheets of Example 1 and Example 2 had good blocking properties and workability. On the other hand, the tack sheet of Comparative Example 1 does not have a convex portion, so when it is wound into a roll, the nth (n is an integer) peelability-imparting layer 4 (or adhesive layer 3a) and the n+1th adhesive layer 3a (or peelability-imparting layer 4) come into contact with each other, and the adhesive layer 3a and the peelability-imparting layer 4 are relatively strongly bonded to each other. Therefore, the blocking properties were poor, and since the entire surface of the adhesive layer 3a and the peelability-imparting layer 4 are bonded to each other, the tack sheet is difficult to peel off, and the workability was also poor. The tack sheet of Comparative Example 2 has an acrylic urethane resin layer that does not contain a component for imparting peelability (e.g., silicone) instead of a peelability-imparting layer, and since the acrylic urethane resin layer does not have peelability, the convex portion of the adhesive layer adheres to the acrylic urethane resin layer. Therefore, the blocking properties were poor, but since the contact area between the convex portion and the acrylic urethane resin layer is relatively small, the adhesive force is relatively small, and the workability was relatively good.

[0037] The present invention can have the following configurations, for example. (1) A base layer; An adhesive layer provided on the outermost surface of one side of the base layer; a release property imparting layer having release properties provided on the outermost surface of the other surface side of the base material layer; having The adhesive layer is characterized in that it comprises an adhesive layer formed on the outermost surface of the one side, and a plurality of adhesive convex portions provided on the surface of the adhesive layer opposite the base layer.

[0038] (2) The tuck sheet according to (1) above, wherein the protrusions are arranged in a striped pattern. (3) The tack sheet according to (1) or (2) above, wherein the peelability-imparting layer contains silicone or fluorine resin.

[0039] (4) The tack sheet according to any one of (1) to (3) above, characterized in that it is wound into a roll shape so that the nth layer (n is an integer) of the convex portion or the peelability-imparting layer is in contact with the n+1th layer of the peelability-imparting layer or the convex portion. [Explanation of symbols]

[0040] 1 Tuck Sheet 2 Base material layer 3 Adhesive layer 3a Adhesive layer 3b Convex part 4. Peelability-imparting layer

Claims

1. A base layer; An adhesive layer provided on the outermost surface of one side of the base layer; a release property imparting layer having release properties provided on the outermost surface of the other surface side of the base material layer; having The adhesive layer is characterized in that it comprises an adhesive layer formed on the outermost surface of the one side, and a plurality of adhesive convex portions provided on the surface of the adhesive layer opposite the base layer.

2. The tuck sheet according to claim 1 , wherein the protrusions are arranged in a stripe pattern.

3. 3. The tack sheet according to claim 1, wherein the peelability-imparting layer contains silicone or fluorine resin.

4. The tack sheet according to claim 1 or claim 2, characterized in that it is wound into a roll shape so that the nth (n is an integer) of the convex portions and the n+1th of the peelability-imparting layers, or the nth of the peelability-imparting layers and the n+1th of the convex portions, are in contact with each other.

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