Display panel set

Abstract

To provide a display instrument difficult to generate falling off or curling of a poster, although it does not damage a poster.SOLUTION: A set of display panels for sheet-like products 11 includes a panel material 20 and a display material protective adhesive sheet 9. The panel material 20 comprises a generally plate-shaped support 1 with a first main face 21 and a second main face 23, and a double-sided adhesive sheet 5 consisting of a first adhesive layer 12 adhered to the second main face 23 of the support 1, a base film 10, and a second adhesive layer 14 provided in this order. The display material protective adhesive sheet 9 includes a resin film 16, a third adhesive layer 22 provided on one side of the resin film 16 that adheres to a back face of the sheet-like product 11 during use, and a release agent layer 18 provided on the other side of the resin film 16 that can be detachably adhered to the second adhesive layer 14.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a display panel set capable of displaying sheet-like items such as photographs and advertisements. [Background technology]

[0002] 2. Description of the Related Art Panels for displaying notices such as photographs and posters are widely used both indoors and outdoors. As a well-known bulletin board, for example, a bulletin board having a wooden panel and on which notices are fixed using push pins or the like has been known for a long time.

[0003] In addition, JP 2020-160458 A (Patent Document 1) describes a low-adhesion decorative board in which a decorative sheet is attached to the surface of a wood substrate and a removable adhesive is applied to the surface of the decorative sheet. The notice attached to this decorative board is coated with a low-adhesion adhesive, so it can be repeatedly attached and removed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2020-160458 Summary of the Invention [Problem to be solved by the invention]

[0005] In bulletin boards with wooden panels that have been known for a long time, notices are fixed with push pins, so they cannot be used when you do not want to damage the notices. The decorative board described in Patent Document 1 makes it possible to attach and remove notices without damaging them, but the adhesive strength of the adhesive layer is weak, so notices tend to fall off, and some notices may curl inward from the edges. If the adhesive strength of the bulletin board to the notices is strengthened, it is possible to reduce the notices falling off or curling, but this increases the possibility of the notices being damaged when being removed from the bulletin board.

[0006] In view of the above problems, an object of the present invention is to provide a notice implement that does not damage notices, yet is less likely to fall off or curl. [Means for solving the problem]

[0007] An example of a display panel set disclosed in the present specification includes a panel material and a display protection adhesive sheet that is attached to the back surface of a sheet-like article when used. The panel material includes a substantially plate-shaped support having a first main surface and a second main surface facing each other, and a double-sided adhesive sheet including a first adhesive layer attached to the second main surface of the support, a base film, and a second adhesive layer that exhibits a weaker adhesive strength than the first adhesive layer, in that order. The display protection adhesive sheet includes a resin film, a third adhesive layer that is provided on one surface of the resin film and attached to the back surface of the sheet-like article, and a release agent layer that is provided on the other surface of the resin film and can be detachably attached to the second adhesive layer. Effect of the Invention

[0008] The display panel set disclosed in this specification can provide a display tool that does not damage the display, yet is less likely to cause the display to fall off or curl. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view showing a panel material included in a display panel set according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, showing the configuration of a display panel set according to an embodiment of the present disclosure. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, showing the configuration of a display panel set according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Fig. 1 is a plan view showing a panel material included in a display panel set according to an embodiment of the present disclosure, Fig. 2 is a cross-sectional view of the display panel set shown in Fig. 1 taken along line II-II, and Fig. 3 is a cross-sectional view of the display panel set taken along line III-III.

[0011] As shown in Figures 1 to 3, the display panel set of this embodiment is a set product that includes a display panel for displaying sheet-like items 11 such as photographs, posters, and documents, and various accessories that are attached as necessary, and is generally distributed with each component packaged together.

[0012] This display panel set includes a panel material 20 having a substantially plate-shaped support 1 having a first main surface 21 and a second main surface 23 facing each other, and a double-sided adhesive sheet 5 attached to the second main surface 23 of the support 1. The double-sided adhesive sheet 5 has a configuration in which a first adhesive layer 12 attached to the second main surface 23 of the support 1, a base film 10, and a second adhesive layer 14 are provided in this order from the bottom. The adhesive strength of the second adhesive layer 14 to an adherend is weaker than the adhesive strength of the first adhesive layer 12 to the same adherend. In the display panel set, a surface protective film covering the surface of the second adhesive layer 14 may be further provided to make the double-sided adhesive sheet 5 easier to handle.

[0013] The display panel set also includes a display protection adhesive sheet 9 having a resin film 16, a third adhesive layer 22 provided on one side of the resin film 16 and attached to the back surface of the sheet-like article 11 during use, and a release agent layer 18 provided on the other side of the resin film 16 and removably attachable to the second adhesive layer of the double-sided adhesive sheet 5.

[0014] 2, the notice protection adhesive sheet 9 is packaged with, for example, a panel material 20, but may be provided in a state where it is not attached to the panel material 20. In this case, the notice protection adhesive sheet 9 may have a surface protection sheet (not shown) that detachably covers the adhesive surface of the third adhesive layer 22. A plurality of notice protection adhesive sheets 9 may be packaged with one panel material 20. This allows the notice to be replaced multiple times.

[0015] In the display panel set of this embodiment, the sheet-like article 11 can be repeatedly attached and removed from the panel material 20 with the display protection adhesive sheet 9 attached to the back surface. After displaying, the sheet-like article 11 can be stored without being damaged with the display protection adhesive sheet 9 still attached to the back surface. In addition, since the display protection adhesive sheet 9 is attached to the back surface, the sheet-like article 11 is reinforced, so that even if the sheet-like article 11 is an article that is prone to curling by itself, such as paper, curling is unlikely to occur.

[0016] Furthermore, by appropriately selecting the combination of the second adhesive layer 14 and the release agent layer 18, it is possible to reduce lifting or peeling at the edges of the sheet-like article 11, while at the same time, because the release agent layer 18 is in contact with the second adhesive layer 14, it is possible to peel off the sheet-like article 11 without damaging it.

[0017] For example, in a state in which a 25 μm-thick PET film is laminated to the first adhesive layer 12 of the double-sided adhesive sheet 5, and the release agent layer 18 of a notice protection adhesive sheet 9 having a third adhesive layer 22 laminated to commercially available photo paper is laminated to the second adhesive layer 14, the peel strength of the second adhesive layer 14 from the release agent layer 18 after 24 hours in an environment of 23° C. and a relative humidity of 50% may be 0.05 N / 50 mm or more and 5.0 N / 50 mm or less. A peel strength in this range is preferable because curling is unlikely to occur and the sheet-like article 11 is unlikely to fall off the panel material 20 for a long period of time.

[0018] If the adhesive strength of the second adhesive layer 14 is too strong, dust will easily adhere to the adhesive surface of the second adhesive layer 14 and the adhesive strength will decrease when the sheet-like article 11 is repeatedly attached and removed. However, if the material constituting the second adhesive layer 14 is a slightly adhesive or weakly adhesive type adhesive, even if the adhesive surface becomes dirty, dust and the like can be easily removed by using a tape with stronger adhesive strength.

[0019] First adhesive layer 12 of double-sided adhesive sheet 5 only needs to have an adhesive strength sufficient to prevent double-sided adhesive sheet 5, notice protection adhesive sheet 9, and sheet-like article 11 from falling off from support 1, and only needs to be formed from a cured product of one or more adhesives selected from acrylic adhesives, acrylic-urethane adhesives, acrylic-silicone adhesives, silicone adhesives, urethane adhesives, rubber adhesives, and polyester adhesives. The thickness of first adhesive layer 12 is not particularly limited.

[0020] There are no particular limitations on the thickness or constituent material of the second pressure-sensitive adhesive layer 14, so long as the layer has a weaker adhesive strength to the same adherend than the first pressure-sensitive adhesive layer 12. The second pressure-sensitive adhesive layer 14 may be formed from a cured product of one or more types of pressure-sensitive adhesive selected from an acrylic pressure-sensitive adhesive, an acrylic-urethane pressure-sensitive adhesive, an acrylic-silicone pressure-sensitive adhesive, a silicone pressure-sensitive adhesive, a urethane pressure-sensitive adhesive, a rubber pressure-sensitive adhesive, and a polyester pressure-sensitive adhesive.

[0021] The support 1 is a support for attaching the sheet-like article 11 to be posted, and the material of the support 1 is not particularly limited as long as it is a solid, approximately plate-like object. Examples of materials for the support 1 include wood or wood-based materials, various synthetic resins, metals such as aluminum and stainless steel, and ceramics, but wood or wood-based materials are preferable because they are relatively lightweight, resistant to breakage, and can be used for a long period of time. Porous materials such as hard sponges can also be used as the material for the support 1.

[0022] A recess 3 with a peripheral portion 6 remaining in a frame shape may be formed on the second main surface 23 side of the support 1. By forming the recess 3, the support 1 is made lighter and is less likely to fall off when it is attached to a wall surface or the like. By leaving the peripheral portion 6 in a frame shape, it is possible to firmly attach the double-sided adhesive sheet 5 to the support 1 in a state where it is difficult to peel off. In addition, by providing the recess 3, when peeling the sheet-like article 11 to which the notice protection adhesive sheet 9 is attached from the support 1, the double-sided adhesive sheet 5 can bend toward the inside of the recess 3 compared to when the recess 3 is not provided, so that the sheet-like article 11 is less likely to be stressed. For this reason, the sheet-like article 11 is less likely to bend.

[0023] The panel material 20 may further have a panel fixing layer 7 provided on the first main surface 21 of the support 1 for fixing the support 1 to the wall surface by at least one of an adhesive force and an adhesive force. The display panel set of this embodiment may be leaned against a floor surface and a wall surface, but the provision of the panel fixing layer 7 allows it to be fixed to any location on the wall surface. A separate adhesive layer or double-sided adhesive sheet may be provided on the wall surface side surface and / or the support 1 side surface of the panel fixing layer 7. This makes it possible to fix the display panel to a wall surface or the like even if the wall surface is uneven or the adhesive force or adhesive force of the panel fixing layer 7 is weak. In the display panel set, a release liner may be attached to the surface of the panel fixing layer 7 that is attached to the wall surface before use.

[0024] The display panel set of this embodiment may further include a laminate sheet (not shown) that covers the display surface opposite the back surface of the sheet-like article 11. The laminate sheet may have, for example, a transparent surface substrate and a transparent adhesive layer formed on one surface of the surface substrate. The surface substrate may be made of a resin such as polyethylene terephthalate (PET), polypropylene (PP), polyvinyl chloride (PVC), or the like, and may contain a matting agent such as silica particles.

[0025] By attaching a laminate sheet to the surface of the sheet-like article 11, if the sheet-like article 11 is a photograph or a printed matter, it is possible to protect the printed surface and suppress deterioration. In addition, if a matting agent is contained in the surface substrate or the adhesive layer, it is possible to give the sheet-like article 11 a subdued texture.

[0026] The display panel set described above can be modified as appropriate without departing from the spirit and scope of the present invention. EXAMPLES

[0027] The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples.

[0028] -Manufacturing panel materials- The support was made by cutting the second main surface of a 2L-sized wooden board with a thickness of 18 mm to form a recess with a depth of 15 mm while leaving a frame with a width of about 18 mm. In addition, a strong adhesive double-sided adhesive sheet ("NT-808WF" manufactured by Nichiei Shinka Co., Ltd.) was attached to one side of an adhesive sheet with a thickness of 1.5 mm.

[0029] A double-sided adhesive sheet ("NE-Mount50-Si" manufactured by Nichiei Shinka Co., Ltd.) was prepared, which had a PET film core, a strong adhesive acrylic adhesive layer on one side, and a weak adhesive silicone adhesive layer on the other side, and the acrylic adhesive layer of this double-sided adhesive sheet was bonded to the second main surface of the support. Next, the panel material was produced by bonding the other side of the double-sided adhesive sheet, one side of which was bonded to an adsorption sheet, to the first main surface of the support.

[0030] <Example 1> A poster protection adhesive sheet ("Silicon PET25-L-KG2" manufactured by Nichiei Shinka Co., Ltd.) having a resin film with a thickness of 25 μm and a silicone release agent layer formed on the surface and an acrylic strong adhesive layer formed on the back side was prepared, and the acrylic strong adhesive layer was attached to the back side (the side opposite the printed layer) of commercially available photo paper. Next, the acrylic adhesive layer of the same double-sided adhesive sheet ("NE-Mount50-Si" manufactured by Nichiei Shinka Co., Ltd.) used for the panel material was attached to a backing material (a PET film with a thickness of 25 μm), and then the silicone release agent layer exposed on the back side of the photo paper was attached to the silicone adhesive layer. In this way, a sheet for peel force measurement was prepared.

[0031] In addition, for practical use tests, the acrylic strong adhesive layer of the poster protection adhesive sheet was attached to the back side of photo paper, and then the silicone release agent layer of the poster protection adhesive sheet was attached to the silicone adhesive layer of the panel material.

[0032] <Comparative Example 1> The acrylic adhesive layer of the same double-sided adhesive sheet used for the panel material was attached to a backing material (a 25 μm-thick PET film), and then the silicone adhesive layer was attached to the back side of the same photo paper used in Example 1. In this way, a sheet for measuring peel strength was prepared.

[0033] For practical use tests, the back side of a piece of photo paper was attached to the silicone adhesive layer of the panel material.

[0034] - Measuring the peeling force when peeling a double-sided adhesive sheet from photo paper - For measuring the peel strength, the sheets prepared in Example 1 and Comparative Example 1 were each cut to 50 mm to prepare test pieces, and the test pieces were then held at 23°C and 50% relative humidity for 24 hours after lamination. The force required to peel the test pieces from the double-sided adhesive sheet side in the same environment was measured using a universal material testing machine (TENSILON RT1-1225, manufactured by A&D Co., Ltd.) at a peel angle of 180 degrees and a peel speed of 300 mm / min. Three test pieces were prepared for each Example 1 and Comparative Example 1.

[0035] - Actual use test of the display panel - As Example 1, a piece of photo paper with a poster protection adhesive sheet attached to the back side was used, and as Comparative Example 1, a piece of photo paper was used. Each was attached to a panel material and pressed with a force of about 9.8 N, and then The adhesive sheet side was attached to the interior wall of a typical house covered with wallpaper. In this state, the display was left up for three weeks under conditions of 20℃ to 27℃ and relative humidity of 50% to 75%, and the presence or absence of any changes was observed.

[0036] -Test Results- Table 1 shows the results of the peel force measurements, and Table 2 shows the results of the actual use test.

[0037] [Table 1]

[0038] [Table 2] As shown in Table 1, the peel strengths of the silicone adhesive layer from the silicone release agent layer measured in Example 1 were 0.13 N / 50 mm, 0.13 N / 50 mm, and 0.12 N / 50 mm, with an average of 0.13 N / 50 mm. In contrast, the peel strengths of the silicone adhesive layer from the back surface of the photo paper measured in Comparative Example 1 were 0.02 N / 50 mm, 0.03 N / 50 mm, and 0.03 N / 50 mm, with an average of 0.03 N / 50 mm.

[0039] From these results, it was found that the peeling force was much smaller when the photo paper was directly attached to the panel material than when the silicone release agent layer of the poster protection adhesive sheet was attached. This was thought to be because the photo paper had a coating layer containing resin on the back side.

[0040] From the results of the practical test shown in Table 2, it was confirmed that in Example 1, the photo paper did not fall off the panel material even after 3 weeks, whereas in Comparative Example 1, the photo paper fell off the panel material after about 2 weeks. Furthermore, in Example 1, the panel material did not fall off the wall surface after 3 weeks. From this, it was confirmed that the use of the display panel set of this embodiment allows the desired sheet-like item to be displayed for a long period of time.

[0041] In contrast, in Comparative Example 1, the peel strength of the silicone adhesive layer against the back surface of the photo paper was very weak, which is thought to have caused the photo paper to fall off from the panel material. Although the peel strength of the silicone adhesive layer may differ depending on the type of photo paper, it was thought that this method would be difficult to actually use because it is difficult to adjust the peel strength when attaching photo paper directly to panel material. [Industrial Applicability]

[0042] The display panel set disclosed in this specification is useful for displaying various sheet-like articles such as photographs and posters. [Explanation of symbols]

[0043] 1 Support 3. Recess 5 Double-sided adhesive sheet 6 Periphery 7 Panel fixed layer 9. Poster protection adhesive sheet 10. Base film 11 Sheet-like items 12 First adhesive layer 14 Second adhesive layer 16 Resin film 18 Release agent layer 20 Panel material 21 First main surface 22 Third adhesive layer 23 Second main surface

Claims

1. a panel material including a substantially plate-like support having a first main surface and a second main surface opposed to each other, and a double-sided adhesive sheet including a first adhesive layer attached to the second main surface of the support, a base film, and a second adhesive layer exhibiting an adhesive strength weaker than that of the first adhesive layer, in that order; a display protection adhesive sheet having a resin film, a third adhesive layer provided on one surface of the resin film and attached to the back surface of a sheet-like article during use, and a release agent layer provided on the other surface of the resin film and removably attachable to the second adhesive layer; A display panel set for sheet-like articles comprising:

2. The display panel set according to claim 1 , wherein the panel material further has a panel fixing layer provided on the first main surface of the support and fixing the support to a wall surface by at least one of an adhesive force and an adhesive force.

3. The display panel set according to claim 1 , wherein the support is made of wood or a wood-based material.

4. The display panel set according to claim 1 , wherein a recess is formed on the second main surface side of the support body, the recess leaving a peripheral portion in a frame shape.

5. The display panel set according to claim 1 , further comprising a laminate sheet covering a display surface of the sheet-like article opposite the back surface.

6. The display panel set of any one of claims 1 to 5, wherein a 25 μm thick PET film is attached to the first adhesive layer of the double-sided adhesive sheet, and the release agent layer of the display protection adhesive sheet having the third adhesive layer attached to photo paper is attached to the second adhesive layer, and after 24 hours in an environment of 23°C and 50% relative humidity, the peel force of the second adhesive layer from the release agent layer is 0.05 N / 50 mm or more and 5.0 N / 50 mm or less.

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