JP6614543B1 - Slightly adhesive board - Google Patents

Abstract

A fine adhesive board capable of neatly peeling a paper attached to a fine adhesive layer, and a fine adhesive sheet used for the fine adhesive board and the like are realized. A fine pressure-sensitive adhesive sheet is laminated on a base material sheet and a fine pressure-sensitive adhesive layer comprising a pressure-sensitive adhesive composition mainly composed of a silylated urethane resin adhesive and a silicon resin. The volume ratio of the silylated urethane resin adhesive and the silicone resin in the pressure-sensitive adhesive composition is 100: 10 to 100: 50 at 25 degrees Celsius. [Selection] Figure 2

Description

The present invention relates to the slightly adhesive boards that can be performed repeatedly peeling and sticking of the articles.

  Conventionally, a board capable of attaching an article is known. Japanese Patent Application Laid-Open No. H10-228867 describes a post as a board of this type.

  Specifically, the posting described in Patent Document 1 has a base member made of a support having a viscoelastic microporous membrane on at least one surface, and a smooth surface that can be fixed and peeled to the viscoelastic microporous membrane. It is comprised by the information transmission member which has.

Japanese Utility Model Publication No. 5-83792

  Here, in order to realize a fine pressure-sensitive adhesive sheet that can cleanly peel off the pasted paper (for example, coated paper), the inventor of the present application uses a micro structure as a structure corresponding to the viscoelastic microporous film described in Patent Document 1. Attempted to use a suction cup. However, it has not been possible to realize a fine pressure-sensitive adhesive sheet that can peel off paper cleanly. In the present specification, the phrase “paper can be peeled cleanly” means that the paper is peeled while maintaining its original shape without tearing or part of the surface being peeled off.

  This invention is made | formed in view of such a situation, and it aims at implement | achieving the slightly adhesive sheet and the slightly adhesive board which can peel off the paper affixed on the slightly adhesive layer neatly.

In order to solve the above-mentioned problems, the first invention is a micro-adhesive comprising a base sheet and an adhesive composition laminated on the base sheet and mainly composed of a silylated urethane resin adhesive and a silicon resin. The volume ratio of the silylated urethane resin adhesive and the silicone resin in the pressure-sensitive adhesive composition is 100: 10 to 100: 50 at 25 ° C. A slightly adhesive sheet that can be repeatedly peeled.
It is.

  In a second aspect based on the first aspect, the volume ratio of the silylated urethane resin adhesive and the silicone resin in the pressure-sensitive adhesive composition is 100: 10 to 100: 20 at 25 degrees Celsius.

  According to a third invention, in the first invention, the volume ratio of the silylated urethane resin adhesive and the silicon resin in the pressure-sensitive adhesive composition is 100: 30 to 100: 50 at 25 degrees Celsius.

  4th invention is a slightly adhesive board provided with any 1st thru | or 3rd slightly adhesive sheet and the board material affixed on the opposite side to the slightly adhesive layer in a slightly adhesive sheet.

  In the first invention, a silylated urethane resin adhesive and a silicon resin are employed as the main components of the adhesive composition constituting the slightly adhesive layer, and the silylated urethane resin adhesive and the silicon resin in the adhesive composition are used. The volume ratio is 100: 10 to 100: 50 at 25 ° C. In this case, the inventor of the present application confirmed that the attached paper can be peeled cleanly. According to the first aspect of the present invention, it is possible to realize a fine pressure-sensitive adhesive board and a fine pressure-sensitive adhesive sheet that can cleanly remove the paper attached to the fine pressure-sensitive adhesive layer.

  In the second invention, the volume ratio of the silylated urethane resin adhesive and the silicone resin in the pressure-sensitive adhesive composition is 100: 10 to 100: 20 at 25 degrees Celsius. In this case, the inventor of the present application has found that the adhesive strength is relatively strong and various things such as not only paper but also a metal small box can be attached. And I realized that I could realize a slightly adhesive board useful as a board for peel-off advertising. According to the second invention, it is possible to realize a slightly adhesive sheet suitable for uses such as a peel-off advertisement board.

  In the third invention, the volume ratio of the silylated urethane resin adhesive and the silicon resin in the pressure-sensitive adhesive composition is 100: 30 to 100: 50 at 25 degrees Celsius. In this case, the inventor of the present application has relatively weak adhesive force, and can remove dust adhered to the surface of the slightly adhesive layer with an adhesive tape, or wipe off the aqueous ink adhered to the surface of the slightly adhesive layer. I discovered that I could do it. According to the third invention, it is possible to realize a slightly adhesive sheet excellent in maintainability.

FIG. 1 is a perspective view of the slightly adhesive board according to the embodiment in use as a peel-off advertisement. Fig.2 (a) is sectional drawing of the slightly adhesive board before peeling a peeling sheet, FIG.2 (b) is sectional drawing of the slightly adhesive board after peeling a peeling sheet.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The following embodiment is an example of the present invention, and is not intended to limit the scope of the present invention, its application, or its use.

[Configuration of slightly adhesive sheet and slightly adhesive board]
The slightly adhesive board 10 is a substantially rectangular board in which a slightly adhesive layer 14 capable of repeatedly attaching and peeling an article is provided on the front side. The slightly adhesive board 10 can be used for various purposes such as a sales promotion board (such as a peel-off advertisement board), a drawing board (such as a white board), or a construction site board. Note that the peel-off advertisement is an advertisement that is installed in a state where a number of promotional items 15 are attached to the slightly adhesive layer 14. Or to appear (see FIG. 1). Further, the shape of the slightly adhesive board 10 may be other than a substantially rectangular shape.

  Specifically, as shown in FIG. 2A, the slightly adhesive board 10 includes a slightly adhesive sheet 11 and a board material 20 attached to the side of the slightly adhesive sheet 11 opposite to the slightly adhesive layer 14. ing. Of these, the slightly adhesive sheet 11 includes a sheet-like substrate sheet 12, a slightly adhesive layer 14 laminated on the front side of the substrate sheet 12, a release sheet 16 laminated on the front side of the slightly adhesive layer 14, and a substrate. And an adhesive layer 18 laminated on the back side of the sheet 12. In the slightly adhesive board 10, any of the layers 12, 14, 16, 18, and 20 has a substantially rectangular planar shape and a uniform layer thickness. As shown in FIG. 2B, the slightly adhesive board 10 can stick the article 25 to the slightly adhesive layer 14 by peeling the release sheet 16.

  The base sheet 12 is a resin film. A transparent film can be used for the base sheet 12. Various materials such as polypropylene resin, polyethylene resin, and polyethylene terephthalate resin can be used for the material of the base sheet 12.

  The slightly adhesive layer 14 is a layer obtained by drying and solidifying a liquid adhesive composition. The slightly adhesive layer 14 has elasticity and is fixed to the front side of the base sheet 12. Further, the slightly adhesive layer 14 is formed over the entire surface of the base sheet 12. The thickness of the slight adhesion layer 14 is 1 mm or less, for example. The color of the slightly adhesive layer 14 can be, for example, transparent or white.

  The above-mentioned pressure-sensitive adhesive composition is mainly composed of a silylated urethane resin-based adhesive and a silicon resin, and the volume ratio of the silylated urethane resin-based adhesive to the silicon resin in the pressure-sensitive adhesive composition is Celsius at atmospheric pressure. It is 100: 10-100: 50 at 25 degreeC. As will be described later, the slightly adhesive layer 14 made of this pressure-sensitive adhesive composition can peel off the attached paper cleanly.

  In addition, the adhesive force of the fine adhesion layer 14 becomes small, so that the volume ratio of the silicone resin in an adhesive composition increases. It can be said that the slightly adhesive layer 14 is a slightly adhesive layer made of a silylated urethane resin adhesive whose adhesive force is adjusted by a silicon resin. Moreover, as a silicon resin mix | blended with the above-mentioned adhesive composition, what has a specific gravity smaller than a silylated urethane resin-type adhesive agent can be used.

  Here, the silylated urethane resin is a resin having a main chain of an organic polymer (polyoxyalkylene polymer) and having a urethane group and a crosslinkable silyl group in the molecule. The silylated urethane resin adhesive is an adhesive (adhesive composition) mainly composed of a water-soluble silylated urethane resin adhesive. In addition to the main component, the silylated urethane resin adhesive includes an additive. Fillers, plasticizers, silane coupling agents, and the like can be added.

  Moreover, as a silicone resin mix | blended with the above-mentioned adhesive composition, an aqueous silicone resin etc. can be used, for example.

  Here, when the volume ratio of the silylated urethane resin adhesive and the silicon resin in the above-mentioned pressure-sensitive adhesive composition is 100: 10 to 100: 20 at 25 ° C. under atmospheric pressure, Even a small box can be attached to the slightly adhesive layer 14. Therefore, in the case of the volume ratio range of this paragraph, it can be used as a peel-off advertisement that can paste various promotional items 15 from relatively heavy items to light items.

  In addition, when the volume ratio of the silylated urethane resin adhesive and the silicon resin in the above-described pressure-sensitive adhesive composition is 100: 30 to 100: 50 at 25 ° C. under atmospheric pressure, paper can be pasted. Although it is possible, it is difficult to attach the above-mentioned small metal box. Further, whether or not it can be attached to the slightly adhesive layer 14 is not determined only by the weight of the article 25, and can be attached even if it is somewhat heavy as long as it is a resin film bag. In the case of the volume ratio range of this paragraph, it can be used for a peel-off advertisement in which a bag of a resin film containing an article can be attached. Moreover, the dust adhering to the surface of the fine adhesion layer 14 can be washed away with water or an adhesive tape, and the fine adhesion sheet 11 excellent in maintainability can be realized. Furthermore, the water-based ink adhering to the surface of the slightly adhesive layer 14 can be wiped off with a tissue paper or cloth, and can be used as a drawing board such as a white board.

  The release sheet 16 is a transparent film for preventing dust or the like from adhering to the surface of the fine adhesive layer 14 or scratching the surface of the fine adhesive layer 14. The release sheet 16 covers the entire surface of the slightly adhesive layer 14. The release sheet 16 is attached to the fine adhesive layer 14 by the adhesive force of the fine adhesive layer 14, but can be easily peeled off from the fine adhesive layer 14 with a relatively small force.

  The adhesive layer 18 is a layer for adhering the base sheet 12 to the board member 20 and fixing it. Various adhesives such as an acrylic adhesive can be used as the adhesive constituting the adhesive layer 18 depending on the materials of the base sheet 12 and the board material 20.

  The board material 20 is a board that is less flexible than the base material sheet 12 and hardly warps. The thickness of the board | plate material 20 is 2-10 mm, for example, and is large compared with the thickness (for example, 1 mm or less) of the base material sheet 12. FIG. As the board material 20, for example, a styrene board can be used.

  In addition, about the slightly adhesive board 10, by forming each layer of the slightly adhesive layer 14, the base material sheet 12, and the contact bonding layer 18 transparently and printing on the front side of the board material 20, the fine adhesive which can visually recognize printing from the front side The board 10 can be realized. Moreover, when using the sheet | seat which can be printed as the base material sheet 12, the slightly adhesive sheet 11 and the slightly adhesive board 10 which can visually recognize printing from the front side are realizable by forming the slightly adhesive layer 14 transparently. Further, as the base sheet 12, a sheet (board) that hardly warps like the board material 20 can be used. In this case, the slightly adhesive sheet 11 can be used as a board as it is.

[Production method of slightly adhesive sheet and slightly adhesive board]
The method for producing the slightly pressure-sensitive adhesive sheet 11 includes a mixing and stirring step of manufacturing the above-mentioned pressure-sensitive adhesive composition by mixing and stirring a silylated urethane resin adhesive (liquid) and a silicon resin (liquid), and a base sheet. Application process of applying the pressure-sensitive adhesive composition to the upper surface of 12, a leveling process of making the thickness of the pressure-sensitive adhesive composition applied to the base sheet 12 constant (flattening the upper surface), and heating in the heat box The solidifying step of drying and solidifying the pressure-sensitive adhesive composition is sequentially performed. In addition, after the solidification process, the release sheet 16 is laminated, and the adhesive layer 18 is formed on the back side of the base sheet 12. Moreover, the manufacturing method of the slightly adhesive board 10 further performs the process of affixing the back side of the slightly adhesive sheet 11 to the board material 20 through the adhesive layer 18.

  Below, a performance test and the result are demonstrated about each fine adhesive sheet 11 of an Example and a comparative example. In addition, this invention is not limited to an Example.

<Example 1>
Example 1 is a pressure-sensitive adhesive composition (liquid) in which the volume ratio of silylated urethane resin adhesive (solvent-free) and silicon resin (aqueous silicone resin) is 100: 15 at 25 ° C. under atmospheric pressure. The slightly adhesive layer 14 made of is the slightly adhesive sheet 11 formed on the base sheet 12 made of polypropylene resin. The slightly adhesive layer 14 was formed through the above-described mixing and stirring step, coating step, leveling step, solidifying step, and the like.

<Example 2>
In Example 2, the pressure-sensitive adhesive layer 14 made of a pressure-sensitive adhesive composition having a volume ratio of silylated urethane resin adhesive and silicon resin of 100: 22 at 25 ° C. under atmospheric pressure is a group made of polypropylene resin. A slightly adhesive sheet 11 formed on the material sheet 12. Except for the volume ratio, it is the same as Example 1.

<Example 3>
In Example 3, the pressure-sensitive adhesive layer 14 made of a pressure-sensitive adhesive composition having a volume ratio of silylated urethane resin adhesive and silicon resin of 100: 40 at 25 ° C. under atmospheric pressure is a group made of polypropylene resin. A slightly adhesive sheet 11 formed on the material sheet 12. Except for the volume ratio, it is the same as Example 1.

<Comparative Example 1>
In Comparative Example 1, the pressure-sensitive adhesive layer 14 made of a pressure-sensitive adhesive composition having a volume ratio of silylated urethane resin adhesive and silicon resin of 100: 5 at 25 ° C. under atmospheric pressure is a group made of polypropylene resin. A slightly adhesive sheet 11 formed on the material sheet 12. Except for the volume ratio, it is the same as Example 1.

<Comparative Example 2>
In Comparative Example 2, the pressure-sensitive adhesive layer 14 made of a pressure-sensitive adhesive composition having a volume ratio of silylated urethane resin adhesive and silicon resin of 100: 60 at 25 ° C. under atmospheric pressure is a group made of polypropylene resin. A slightly adhesive sheet 11 formed on the material sheet 12. Except for the volume ratio, it is the same as Example 1.

Tables 1 to 3 show the results of performance tests described later for Examples 1 to 3 and Comparative Examples 1 and 2.

[Adhesion test]
A test was conducted as to whether or not a coated paper and a metal box can be attached to the slightly adhesive layer 14. The metal box had dimensions of 20 cm long x 15 cm wide x 10 cm high and weighed 200 g. The bottom surface (20 cm long × 15 cm wide) of the small box was attached to the slightly adhesive layer 14. In Table 1, “◯” is assigned to those that could be stably attached to the slightly adhesive layer 14, and “X” was assigned to those that could not be attached to the slightly adhesive layer 14. As shown in Table 1, coated paper can be affixed except for Comparative Example 2 in which a large amount of silicon resin is blended, and a small metal box can be affixed except for Example 3 and Comparative Example 2. Was confirmed.

[Peelability test]
As the peelability of the slightly adhesive layer 14, a test was performed as to whether or not the paper affixed so as to be in close contact with the slightly adhesive layer 14 can be peeled cleanly. High quality paper and coated paper were used as the paper. In Table 1, “◯” is given to those that were able to be peeled cleanly, and “X” was given to those that were not able to be peeled cleanly (those in which a part of the paper was peeled off on the slightly adhesive layer 14). As shown in Table 1, it was confirmed that the coated paper could be removed cleanly except for Comparative Example 1 in which a small amount of silicon resin was blended, and that the fine paper could be removed cleanly in Example 3. Moreover, with Examples 1 to 3 together with the results of the adhesive strength test, it was confirmed that the coated paper could be pasted and that the pasted coated paper could be peeled cleanly.

[Maintenance test 1]
A test is conducted to determine whether or not the adhesive strength can be restored by washing the surface of the fine adhesive layer 14 with water from a state in which the surface of the fine adhesive layer 14 is contaminated with dirt or the like and the adhesive strength is reduced. It was. The change in adhesive strength before and after washing with water was evaluated by the tactile sensation of human hands. In Table 1, “◯” is given to those whose adhesive strength has been restored, and “X” is given to those whose adhesive strength has not been restored. As shown in Table 1, it was confirmed that the adhesive strength was restored for all the test objects.

[Maintenance test 2]
From the state where dirt such as dust adheres to the surface of the fine adhesive layer 14 and the adhesive strength is reduced, the adhesive tape is attached to the surface of the fine adhesive layer 14 and peeled off to remove the dust and restore the adhesive strength. A test was conducted to see if this was possible. The change in adhesive strength before and after the adhesive tape was applied and peeled was evaluated by tactile sensation by human hands. In Table 1, “◯” is given to those whose adhesive strength has been restored, and “X” is given to those whose adhesive strength has not been restored. As shown in Table 1, it was confirmed that the adhesive strength was restored for Example 3 and Comparative Example 2.

[Ink wiping test]
A test was conducted to determine whether ink could be removed by wiping with a tissue paper from the state in which a line was drawn with an aqueous magic on the surface of the slightly adhesive layer 14. In Table 1, “◯” is given to those in which the ink could be removed from the fine adhesion layer 14 (no lines remained on the fine adhesion surface), and “x” was assigned to those in which the ink could not be removed. As shown in Table 1, it was confirmed that ink could be removed for Example 3 and Comparative Example 2.

  The present invention can be applied to a fine pressure-sensitive adhesive board that can cleanly remove the paper attached to the fine pressure-sensitive adhesive layer 14, and a fine pressure-sensitive adhesive sheet used for the fine pressure-sensitive adhesive board.

DESCRIPTION OF SYMBOLS 10 Slightly adhesive board 11 Slightly adhesive sheet 12 Base material sheet 14 Slightly adhesive layer 16 Release sheet 18 Adhesive layer 20 Board material

Claims (3)

A slightly adhesive sheet having a substrate sheet and a slightly adhesive layer laminated on the substrate sheet ;
The board material affixed on the opposite side to the slightly adhesive layer in the slightly adhesive sheet,
The slightly adhesive layer is composed of an adhesive composition mainly composed of a silylated urethane resin adhesive and a silicone resin,
The volume ratio of the silylated urethane resin adhesive and the silicone resin in the pressure-sensitive adhesive composition is 100: 10 to 100: 50 at 25 degrees Celsius,
A fine-adhesive board capable of repeatedly attaching and peeling articles to and from the fine-adhesive layer. The slightly adhesive board of Claim 1 whose volume ratio of the said silylated urethane resin adhesive and the said silicone resin in the said adhesive composition is 100: 10-100: 20 in 25 degreeC. The slightly adhesive board of Claim 1 whose volume ratio of the said silylated urethane resin adhesive and the said silicone resin in the said adhesive composition is 100: 30-100: 50 in 25 degreeC.

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