JP2009120742A - Method for using self-adhesive sheet and self-adhesive resin used therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pasting method for sticking a self-adhesive sheet not only to a smooth surface such as a glass surface but also to a rough painted surface, a rough glass surface and a rough wallpaper surface stably to the extent that the self-adhesive sheet is prevented from dropping by its self-weight, and for allowing peeling removal of the self-adhesive sheet without damaging a material of an adherend such as the wallpaper surface. <P>SOLUTION: A foamed body having restorability is constructed of a material such as an acrylic resin and urethane-based resin. In the foamed body, pores on the surface produce a sucking effect. In a separate process, a small amount of solution, in which a resin having self-adhesive characteristics is diluted, is applied to the foamed body to permeate it, and then, for example, water in the diluted solution is evaporated, so that the self-adhesive resin stably adheres to the foamed body to the extent ranging to the inside faces of its minute pore structure. When the foamed structure is constructed in this way, adhesion to an adherend varied in surface condition such as a smooth surface and a rugged surface can be achieved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for using a pressure-sensitive adhesive sheet which is used as a white board by being detachably attached to, for example, a wall surface, and a pressure-sensitive resin used for the method of use.

  As a conventional pressure-sensitive adhesive sheet, a sheet in which a pressure-sensitive adhesive layer is disposed on a surface having a shrinkable foam layer is known so that it can be fixed in conformity with the uneven shape of the adherend surface. This pressure-sensitive adhesive sheet is affixed to an adherend with a strong pressure-sensitive adhesive, and is not premised on being peeled off. Therefore, the pressure-sensitive adhesive sheet is also used for the purpose of fixing building materials and is firmly fixed.

  In addition, as shown in FIGS. 3 (a) and 3 (b), the surface of the foam layer is fixed to the uneven surface of the wallpaper used at home, etc. so as not to damage the fixed surface when peeled off. As shown in FIGS. 4 (a) and 4 (b), there are those in which a slightly adhesive layer is formed and those in which a slightly adhesive paste is spray-coated on the surface of the foam layer with fine particles.

Furthermore, Patent Document 1 discloses an example in which a pressure-sensitive adhesive layer containing a hot-melt polymer substance is formed in a patch provided with a pressure-sensitive adhesive layer on a support.
JP-A-8-92075

  However, in the case of the pressure-sensitive adhesive sheet having a strong pressure-sensitive adhesive layer, it is not premised on that it is peeled off. Therefore, when the peeling is attempted, the adherend surface may be damaged.

  Further, in the case of the pressure-sensitive adhesive sheet having a slight pressure-sensitive adhesive layer, as shown in FIGS. 3C and 3D, the foamed layer has resilience, so that it cannot sufficiently follow the uneven surface, and the convex portion of the uneven surface is Affixing may be realized by partial fastening at the center, which may be difficult to affix. Eventually, the purpose cannot be achieved unless the adhesive strength of the adhesive layer is increased. As shown in FIG. 3 (e), the surface of the adherend is removed when it is peeled off from the adherend. Will be destroyed. Moreover, the purpose of removing it cleanly cannot be achieved.

  Furthermore, even if the foam layer has an adsorptive property, an adhesive resin layer having a certain thickness is provided on the surface, and as shown in FIG. This will eliminate the adsorption effect. Even in this case, as described above, as shown in FIGS. 3C to 3E, the fixing to the uneven surface is only the adhesive force of the adhesive layer, and it is necessary to increase the adhesive strength. At the same time, the surface of the adherend must be damaged when peeled off.

  In addition, when the fine adhesive paste is spray-applied to the surface of the foam layer, as shown in FIG. 4 (b), the fine-adhesive paste applied by spraying is stably foamed in a state of temporarily adhering to the surface in the form of particles. It cannot be stuck to the layer. Therefore, as shown in FIG. 4 (c), after the adherend is pasted even on a smooth surface or an uneven surface, when peeling off, the slightly adhesive paste moves to the surface of the adherend (the adhesive remains). generate.

  Furthermore, an adhesive foam that has been sprayed with an adhesive is an irregular surface even if the adhesive to which the adhesive is sprayed is a foam having an adsorptive power and the adhesive has a weak adhesive strength. As shown in FIG. 4C, it was confirmed that the phenomenon that the glue particles remain on the adherend when peeled off is similarly observed.

  The present invention can be applied so that the pressure-sensitive adhesive sheet does not fall regardless of the uneven state of the adherend surface, and neatly reduces adhesive residue on the adherend without damaging the adherend surface. It aims at providing the adhesive resin used for the usage method of the adhesive sheet which can be peeled off from a to-be-adhered body, and its usage method.

  In order to achieve the above object, the method of using the pressure-sensitive adhesive sheet according to the present invention includes a pressure-sensitive adhesive sheet having a foamed layer formed by combining a resin forming a foam and a resin having adhesiveness on the surface of the foamed layer. An adhesive resin made of the same material as the resin having adhesiveness is applied to reinforce the adhesive performance.

  According to the above configuration, the foamed layer is formed by combining the base resin forming the foam and the adhesive resin, and the adhesive performance is reinforced by applying the adhesive resin to the surface of the foamed layer. Adhesive performance can be increased moderately, and an adhesive layer having a certain thickness is formed on the surface of the foam, for example, even if it is a few microns, just as if a large amount of adhesive resin was applied to the foam. The flexibility of the foam is not impaired. Thereby, even if the adherend surface is uneven, while setting the adhesive performance to such an extent that the adhesive sheet can be peeled without damaging the adherend, By pasting the entire surface, it is possible to obtain a pasting strength that does not drop the adhesive sheet.

  In addition, as a method for appropriately increasing the adhesive performance of the foam layer, it may be possible to increase the amount of adhesive resin combined with the resin forming the foam when forming the foam layer. Since the restoring force of the foam layer is not sufficient at the time of forming the foam layer and immediately after that, the bubbles in the foam layer are crushed by the adhesive performance. On the other hand, in the method of the present invention, the adhesive resin is applied after the foam layer is formed, that is, after the formation of the resin in which the foam layer has obtained sufficient restoring force is stabilized. Adhesive performance can be improved without crushing.

  Furthermore, since the adhesive resin of the same material as the adhesive resin contained in the foam layer is applied, the adhesive resin to be applied can be stabilized by being adapted to the foam layer, and the adhesive when the adhesive sheet is peeled off The rest can be suppressed as much as possible. Here, examples of the adhesive resin to be applied include water-soluble acrylic resins. Adhesive resin diluted with water has almost no adhesiveness in its diluted state, and adopts one that exhibits adhesive performance when moisture evaporates to only adhesive resin. The effect of realizing a more stable application state can be obtained. By applying a dilute solution of adhesive resin that has almost no viscosity to the foamed layer, a certain viscous resin can be uniformly adhered from the surface of the foamed layer to the inner layer of the bubbles, and the diluted moisture When it evaporates, it becomes possible to uniformly apply the adhesive resin to the foamed layer from the fine irregularities on the surface thereof to the part of the internal bubbles. If the adhesive resin has a viscosity at the stage of applying the adhesive resin to the foam layer, it is difficult to obtain a uniform coating result, as shown in FIG. 3 and FIG. As a result, it is impossible to obtain the expected effective sheet.

  In order to adjust the adhesive strength, it is possible to adopt a method in which the adhesive resin is applied multiple times, but by adjusting the dilution concentration of the water-soluble adhesive resin, the desired amount of the adhesive resin to be adhered is adjusted. If the suction sticking strength is adjusted by setting to the above, the adhesive sheet can be easily set to the desired sticking strength.

  In addition, if the foam layer has an adsorption hole that exposes bubbles on the surface and exerts an adsorption force, the adhesive force of the adsorption hole can be used to reduce the adhesive resin coating amount and reduce the adhesive residue. While suppressing as much as possible, the adhering and sticking strength can be increased. Furthermore, if the adhesive resin is osmotically applied to the surface of the foam layer and / or the wall surface of the adsorption hole, the adsorption hole is not blocked, so that the adsorption force is not impaired, and the adhesion performance is enhanced by the adhesive resin. Adsorption adhesion strength can be increased. Moreover, this invention provides the adhesive resin applied to the surface of the foaming layer of said adhesive sheet, or the dilution liquid of the adhesive resin.

  As is clear from the above description, according to the present invention, a foamed layer is formed by combining a resin forming a foam and a resin having adhesiveness, and the adhesiveness of the resin having the adhesiveness and a similar material is formed on the foamed layer. Since the resin is applied, the pressure-sensitive adhesive performance of the pressure-sensitive adhesive sheet can be appropriately increased. In addition, since it is not necessary to apply a large amount of adhesive resin, the flexibility of the foam is not impaired, it can be applied to the surface of the adherend, and the adhesive sheet can be attached so as not to fall. It can be peeled off without damaging the surface of the body.

  Hereinafter, the usage method of the adhesive sheet which concerns on this invention, and embodiment of adhesive resin used for the usage method are described using drawing. FIG. 1 is a view showing a pressure-sensitive adhesive sheet used in the method according to the present invention, wherein (a) is a cross-sectional view of the pressure-sensitive adhesive sheet, and (b) is a schematic diagram of the pressure-sensitive adhesive sheet attached to a wall surface. 2A and 2B are diagrams for explaining a method of using the pressure-sensitive adhesive sheet according to the present invention, wherein FIG. 2A is a view showing a state where an adhesive resin is applied to the pressure-sensitive adhesive sheet, and FIG. 2B is a schematic diagram of the pressure-sensitive adhesive sheet attached to the wall surface. It is.

  First, the adhesive sheet 1 will be described. The adhesive sheet 1 is used, for example, as a whiteboard by sticking to a wall surface 2 covered with wallpaper, or to hold a pen with a magnet by embedding a magnetic material, The back side is a foam layer 3 formed by combining a resin that forms a foam having resilience based on a material such as acrylic or urethane, and an adhesive resin, and the foam layer 3 is slightly adhesive. In addition to the performance, the air bubbles 4 are exposed on the surface of the foamed layer 3 to form the suction holes 4a that exhibit the suction power.

  Thereby, as shown in FIG. 1, if the state of the wall surface 2 is favorable, the adhesive sheet 1 can be stuck on the wall surface 2 as it is.

  The foaming layer 3 of the pressure-sensitive adhesive sheet 1 is mechanically processed by a foaming machine so that the foaming ratio becomes about 2 to 3 times after adding a thickener, an acrylic resin having adhesiveness, and a foaming agent to an acrylic resin. Foaming, adding foam stabilizer to this to form uniform foam, adding cross-linking agent, and forming creamy acrylic resin into a sheet by painting, heating it with a kettle It is formed by evaporating moisture.

  Next, a method of using the pressure-sensitive adhesive sheet 1 will be described. First, as shown in FIG. 2A, a water-soluble acrylic resin 5 that is a material similar to the acrylic resin having adhesiveness added to the foamed layer 3 is prepared. It is diluted with a diluent such as water and applied to the surface of the foam layer 3 of the pressure-sensitive adhesive sheet 1 and / or the wall surface of the suction hole 4a in a small amount. As a result, the particles of the water-soluble acrylic resin 5 penetrate into the fine portions inside the foamed layer 3, so that the diluted component (water) is evaporated and the water-soluble acrylic resin 5 is stably fixed. The adhesive performance of the adhesive sheet 1 is reinforced. Note that the diluted solution of the water-soluble acrylic resin 5 has a very low viscosity and can be spray processed to obtain the same effect.

  At this time, since the water-soluble acrylic resin 5 which is the same material as the foamed layer 3 made of the acrylic resin is applied, the particles are more stably fixed. Further, the water-soluble acrylic resin 5 does not block the adsorption hole 4a of the foam layer 3, and the adhesion performance of the adhesive sheet 1 is reinforced while maintaining the adsorption effect of the adsorption hole 4a.

  As shown in FIG. 2 (b), when the pressure-sensitive adhesive sheet 1 with reinforced adhesive performance is attached to the uneven wall surface 2, the foamed layer 3 fits into the uneven surface of the wall surface 2 and the entire surface comes into contact. As a result, the adsorption holes 4a of the foam layer 3 adsorb the fine surface of the uneven surface of the wall surface 2 due to the adsorption effect, and parts other than the adsorption holes 4a adhere to the wall surface 2 due to the reinforced adhesive force. Stick. Here, the adhering and adhering strength can be adjusted by adjusting the dilution concentration of the water-soluble acrylic resin 5 and enables adhering and adsorbing corresponding to various uneven surfaces.

  Further, the water-soluble acrylic resin 5 applied to the pressure-sensitive adhesive sheet 1 is in a very small amount, and when the pressure-sensitive adhesive sheet 1 is peeled off, the wallpaper or the like is not damaged, and the water-soluble acrylic resin 5 is not left on the surface of the wallpaper. .

  According to the said structure, after diluting the water-soluble acrylic resin 5 and making it apply | penetrate a trace amount to the foaming layer 3 which has the resilience formed with resin based on materials, such as an acryl and urethane, the water | moisture content is made into it. Since it evaporates, the water-soluble acrylic resin 5 can be stably adhered to the inner surface of the fine bubbles 4 in the foam layer 3 to reinforce the adhesive force of the foam layer 3. Thereby, the adhesive sheet 1 is applied to the adherend surface in various states from a smooth surface such as a glass surface to an uneven coating surface and a wallpaper surface by the adsorption effect of the adsorption holes 4a and the adhesive force reinforced by the foam layer 3. It can be adsorbed and stuck stably to the extent that it does not peel off due to its own weight. Moreover, since the amount of the water-soluble acrylic resin 5 to be applied is very small, the attached adhesive sheet 1 can be peeled off without destroying the material of the adherend such as wallpaper.

It is a figure which shows the adhesive sheet used with the method which concerns on this invention, (a) is sectional drawing of an adhesive sheet, (b) is a schematic diagram of the adhesive sheet affixed on the wall surface It is a figure explaining the usage method of the adhesive sheet which concerns on this invention, (a) is a figure which shows a mode that adhesive resin is apply | coated to an adhesive sheet, (b) is a schematic diagram of the adhesive sheet affixed on the wall surface The figure which shows the adhesive sheet which has the conventional slightly adhesive layer The figure which shows the adhesive sheet which applies the conventional adhesive spray

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adhesive sheet 2 Wall surface 3 Foam layer 4 Bubble 4a Adsorption hole 5 Water-soluble acrylic resin

Claims (6)

  A pressure-sensitive adhesive sheet having a foamed layer formed by combining and mixing a resin forming a foam and a resin having adhesiveness, and a pressure-sensitive adhesive resin of the same material as the resin having the above-mentioned adhesiveness on the surface of the foamed layer A method of using a pressure-sensitive adhesive sheet, characterized in that the adhesive performance is reinforced by applying a coating.   The method for using an adhesive sheet according to claim 1, wherein the adhesive resin to be applied is a water-soluble acrylic resin.   The method for using the pressure-sensitive adhesive sheet according to claim 2, wherein the adhering strength is adjusted by adjusting a dilution concentration of the water-soluble pressure-sensitive adhesive resin.   The method for using a pressure-sensitive adhesive sheet according to any one of claims 1 to 3, wherein the foamed layer has an adsorption hole in which bubbles are exposed on the surface and exerts an adsorption force.   The method for using a pressure-sensitive adhesive sheet according to claim 4, wherein the pressure-sensitive adhesive resin is applied to the surface of the foamed layer and / or the wall surface of the adsorption hole.   The adhesive resin apply | coated to the surface of the foaming layer of the adhesive sheet in any one of Claims 1-5.

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