JPH09227843A - Pressure-bondable pressure-sensitive adhesive sheet and pressure-sensitive-adhesive-laminated decorative board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pressure-bondable pressure-sensitive adhesive sheet which shows excellent releasability when it is released in order to correct the sticking position and can be rolled up without impairing the releasability due to the pressure of winding. SOLUTION: This sheet 1 is prepared by forming pressure-sensitive adhesive layers 3 and 4 on both surfaces of a foamed sheet 2 having a compressive stress of 0.01-100kg/cm<2> at 50% compression and laying a non-pressure-sensitive- adhesive or slightly pressure-sensitive-adhesive masking member 5 on at least either of the layers 3 and 4. When pressure exerts on it, the compressive deformation of the sheet 2 occurs, and the external surface of the member 5 is situated on the surface of or within the pressure-sensitive layer. It is adapted so that the layer 3 may be pressed against the adherend by the repulsive force of the sheet 2. If a pressure of winding exerts on it, the sheet 2 deforms. When the pressure of winding is released, the sheet 2 is restored to its initial shape to protrude the member 5 from the layer 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to adjust the position at the time of application since the adhesive force on the surface is hardly exerted when it is brought into contact with the back surface of a flooring material, skirting board, wall material, ceiling material or the like. The present invention relates to a pressure-sensitive adhesive type pressure-sensitive adhesive sheet which is easy and can exhibit sufficient pressure-sensitive adhesive properties by pressure at the time of adhesion, and a pressure-sensitive adhesive laminated decorative board obtained by laminating the pressure-sensitive adhesive type pressure-sensitive adhesive sheet on a decorative board.

[0002]

2. Description of the Related Art Conventionally, in the field of construction, an adhesive has been widely used for joining building materials. That is,
BACKGROUND ART Adhesives have been widely used for bonding floor materials, skirting boards, wall materials, ceiling materials, and the like to structures at construction sites. However, when joining building materials using an adhesive, a series of operations must be performed after preparing the adhesive, applying the adhesive, bonding the building materials, and waiting for the adhesive to cure. , The workability of joining building materials is low and requires a relatively long time.

Therefore, in recent years, a method of joining a building material such as a skirting board to a structure using a double-sided pressure-sensitive adhesive tape instead of an adhesive has become widespread. In the joining method using a double-sided adhesive tape, by bonding one adhesive layer surface of the double-sided adhesive tape to the building material, the double-sided adhesive tape is fixed to the building material side, and then the other adhesive layer surface of the double-sided adhesive tape is bonded. The building material is joined by sticking it to the sticking position, that is, the surface of the building structure. Alternatively, a method has also been used in which a double-sided adhesive tape is attached in advance to a sticking position where a building material is bonded, and the building material is attached using an adhesive layer outside the double-sided adhesive tape.

[0004] However, in any of the above methods, there is a problem that it is extremely difficult to correct the sticking position after the building material is once stuck to the structure of the building using a double-sided adhesive tape. That is, it is very difficult to re-peel the building material or shift the building material to a correct position after being once attached.

[0005] Therefore, the following two methods have been proposed as methods that can be easily peeled after pasting. The first method is a method in which the release paper of the double-sided pressure-sensitive adhesive tape is subjected to a spine splitting process, and the release paper for temporary fixing and the release paper for final stop are used for sticking. In this method, the release paper for temporary fixing is first peeled off, and the building material is temporarily fixed at the attaching position. Since the adhesive strength of the adhesive layer exposed by peeling the release paper for temporary fixing is not sufficient, if the sticking position is shifted from the target position, remove it again or shift the sticking position Can be. Next, after adjusting the position, the release paper for final fixing is peeled off, and the building material is finally attached. However, in the method of applying the spinning process to the release paper, the operation is complicated as described above, and it is difficult to adjust the release paper to have sufficient removability. In addition, the release paper has to be split in various forms according to the shape and dimensions of the building material.

A second method is to use a pressure-sensitive adhesive for a double-sided pressure-sensitive adhesive tape, which has a low initial adhesive strength and therefore has removability, and the adhesion of which increases with time.
Adhesive residue may occur during re-peeling, and it was difficult to provide sufficient re-peeling property.

[0007] To solve the above problems,
Japanese Patent Application Laid-Open No. 7-310057 discloses an adhesive sheet in which a projection made of a solid non-adhesive substance is formed on at least one surface of an adhesive layer. In this adhesive sheet, fine adjustment of the adhesive sheet can be easily performed at the time of sticking, due to the presence of the convex portion due to the solid non-tacky substance,
In addition, it is described that a non-tacky substance sinks below the surface of the pressure-sensitive adhesive due to a pressing force at the time of bonding, whereby sufficient bonding force can be exhibited.

[0008]

The double-sided pressure-sensitive adhesive tape is usually manufactured in a long form and wound on a roll. That is, the double-sided pressure-sensitive adhesive tape is usually supplied in a state of being wound on a roll.

However, in the adhesive sheet described in Japanese Patent Application Laid-Open No. Hei 7-310057, when the adhesive sheet is wound into a roll, the convex portion made of the non-adhesive substance is pushed toward the adhesive layer side by the winding pressure, and the uniform convex portion is formed. There is a problem that it becomes difficult to maintain the shape. In particular, since a larger winding pressure is applied to a portion close to the core of the roll, in extreme cases, the convex portion sinks and the intended removability may not even be obtained.

The object of the present invention is to provide a pressure-sensitive adhesive type pressure-sensitive adhesive which is excellent in removability for correcting the sticking position and which is unlikely to be impaired by the winding pressure when wound into a roll. A sheet and a pressure-sensitive adhesive laminated decorative board using the pressure-sensitive adhesive type pressure-sensitive adhesive sheet.

[0011]

The present invention has been made to achieve the above object. The invention according to claim 1 has a compressive stress of 0.01 to 100 kg at 50% compression.
Adhesive layer is formed on both sides of the foam sheet having a thickness of 1 / cm ² , and the surface of at least one of the adhesive layers is evenly and partially covered so as to protrude from the surface. Thus, the pressure-sensitive adhesive type pressure-sensitive adhesive sheet is characterized in that non-adhesive or slightly adhesive masking members are laminated.

In the pressure-adhesive pressure-sensitive adhesive sheet according to the present invention, the non-adhesive or slightly adhesive masking member is characterized in that
As described in (1), the pressure-sensitive adhesive layer is configured so that its outer surface can be located at the surface of the pressure-sensitive adhesive layer or inside the surface due to compression deformation of the foam sheet during pressure bonding, and prior to bonding. When the pressure is released during storage and then the pressure is released, the deformation of the foam sheet is recovered and the non-adhesive or slightly adhesive masking member is projected again from the surface of the non-adhesive layer. The seat is made up.

As described in claim 3, the non-adhesive or slightly adhesive masking member can be composed of, for example, any one of gauze, woven cloth, non-woven cloth, metal mesh and molding net.

Further, in the pressure-sensitive adhesive laminated decorative board according to the present invention, as described in claim 4, the non-adhesive or slightly adhesive masking member is exposed on one surface of the decorative board. 3. The pressure-sensitive adhesive type pressure-sensitive adhesive sheet according to any one of 3 above is laminated.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below.
The structure and principle of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet according to the present invention,
This will be described with reference to FIGS.

FIG. 1 is a partially cutaway sectional view showing an example of the pressure-adhesive pressure-sensitive adhesive sheet of the present invention. The pressure-sensitive adhesive type pressure-sensitive adhesive sheet 1 has a structure in which pressure-sensitive adhesive layers 3 and 4 are formed on both sides of a foam sheet 2, and a non-adhesive or slightly adhesive masking member 5 is laminated on the surface of one pressure-sensitive adhesive layer 3. Have. The non-adhesive or slightly adhesive masking member may be provided on the surface of the other adhesive layer 4.

The principle of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet shown in FIG. 1 will be described. In the pressure-adhesive pressure-sensitive adhesive sheet 1, a non-adhesive or slightly adhesive masking member 5 is laminated on the surface of the adhesive layer 3 so as to project in the illustrated state. Therefore, when the pressure-adhesive pressure-sensitive adhesive sheet 1 is brought into contact with the surface of the adherend from the side of the pressure-sensitive adhesive layer 3, the pressure-sensitive adhesive layer 3 does not contact the surface of the adherend. Therefore, the position of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet 1 can be freely adjusted in a state of being brought into contact with the surface of the adherend. In this case, the pressure-sensitive adhesive type pressure-sensitive adhesive sheet 1 is usually attached to a building material such as a skirting board or a floor material on the pressure-sensitive adhesive layer 4 side in advance, but the pressure-sensitive adhesive type pressure-sensitive adhesive sheet is adhered to the surface of the adherend. After sticking the sheet 1, building materials such as skirting boards and flooring materials to be stuck may be stuck to the adhesive layer 4 side.

As described above, since the non-adhesive or slightly adhesive masking member 5 is present, the pressure-adhesive pressure-sensitive adhesive sheet 1 can freely adjust its position in contact with the surface of the adherend. The pressure-sensitive adhesive pressure-sensitive adhesive sheet 1 can be attached by pressing the pressure-sensitive adhesive pressure-sensitive adhesive sheet 1 toward the adherend after completion of the position adjustment.

More specifically, as shown in FIG. 2, the foam sheet 2 is compressed and deformed by pressure, and the non-adhesive or slightly adhesive masking member 5 is formed on the surface 3a of the adhesive layer 3 or the surface thereof. It will be moved inward of 3a. On the other hand, the compressive stress in the foam sheet 2 generated by the pressure causes the pressure-sensitive adhesive layer 3 to come into pressure contact with the surface of the adherend from the back surface of the pressure-sensitive adhesive layer 3. Therefore, except for the portion where the non-adhesive or slightly adhesive masking member 5 is laminated, the pressure-sensitive adhesive layer 3 is pressed against the surface of the adherend and firmly adhered thereto.

Therefore, in the pressure-sensitive adhesive type pressure-sensitive adhesive sheet 1, it is possible to easily perform position adjustment and re-peeling until the final decision of the attaching position, and correct by applying pressure after the position adjustment is completed. It can be firmly adhered to the position.

In addition, even if a pressure is applied when the pressure-adhesive pressure-sensitive adhesive sheet 1 is wound around a roll or the like, since the foam sheet has flexibility, it is a non-adhesive or slightly adhesive masking member. 5 does not sink into the adhesive layer 3.
Further, when it is pulled out from the take-up roll, the foam sheet returns to its original shape due to release of the winding pressure, so that the non-adhesive or slightly adhesive masking member 5 has the surface 3a of the adhesive layer 3 as shown in FIG. Will be projected again from.

Therefore, the pressure-sensitive adhesive type pressure-sensitive adhesive sheet 1 of the present invention
Can be provided in a state of being wound around a winding roll, and even in that case, the performance of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet 1 is not impaired.

The foam sheet 2 is composed of a foam sheet having a compressive stress of 0.01 to 100 kg / cm ² at 50% compression. That is, the foam sheet 2 is made of a flexible foam sheet. this is,
As is clear from the above description of the principle, when pressure is applied as in pressure bonding, the foam sheet 2 is deformed by compression, whereby the non-adhesive masking material 5 is applied to the surface of the adhesive layer 3 or The pressure-sensitive adhesive layer 3 is configured to be positioned inside the surface, and at the time of pressure bonding, the pressure-sensitive adhesive layer 3 is compressed from the back surface of the pressure-sensitive adhesive layer 3 except the portion where the non-adhesive or slightly adhesive masking member 5 is provided. This is because it is pressed against the attaching position.

The material forming the foam sheet is not particularly limited as long as it can exhibit sufficient flexibility and compressive stress to perform the above-mentioned action, and examples thereof include polyolefin resin foam. A body sheet, a urethane-based foam sheet, a rubber-based foam sheet, or the like can be used. The foam sheet may be a closed-cell foam sheet or an open-cell foam sheet. More specifically, the foam sheet is a polyethylene-based closed-cell foam sheet manufactured by Sekisui Chemical Co., Ltd., trade name: Softlon, polyethylene closed-cell foam sheet manufactured by High Sheet Co., Product name: High sheet etc. can be mentioned.

The compressive stress at the time of 50% compression is 1
Foam sheet test pieces punched out in a disc shape of cm ² were laminated to have a thickness of about 8 mm, and a load was applied from above to 50
% Is a value measured by measuring the load when compressed.

In the present invention, the reason why the compressive stress at 50% compression is within the above range is that when the pressure is less than 0.01 kg / cm ² , the flexibility of the foam sheet becomes too high, and This is because it is difficult to sufficiently obtain the effect of pressing the pressure-sensitive adhesive layer against the sticking surface due to the stress.
If it exceeds cm ² , since the flexibility is insufficient, it is difficult to position the non-adhesive or slightly adhesive masking member inside the pressure-sensitive adhesive layer surface even if pressure is applied, and sufficient adhesive force cannot be obtained. Because. The compressive stress at the time of 50% compression is preferably 0.05 to 80.0 kg / c.
The range of m ² is different depending on the type of the foam sheet. For example, in the case of an open-cell type urethane foam sheet, the range is 0.05 to 0.1 kg / cm ² , the range of closed-cell type. In the case of a polyethylene-based foam sheet, 0.
It is in the range of 6 to 80.0 kg / cm ² .

The thickness of the foam sheet is not particularly limited as long as it satisfies the function of the present invention, but is usually 0.5.
~ 10.0 mm. Regarding the adhesive layers 3 and 4,
An appropriate pressure-sensitive adhesive that is commonly used for forming the pressure-sensitive adhesive layer of the double-sided pressure-sensitive adhesive tape can be used. Examples of such a pressure-sensitive adhesive include acrylic acid ester-based, polyether-based, urethane-based, and natural or synthetic rubber-based appropriate pressure-sensitive adhesives. Among them, acrylic acid ester is preferable from the viewpoint of adhesive strength. It is preferable to use a system adhesive.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer preferably has a gel fraction in the range of 5 to 99% by weight because it can satisfy both the pressure-sensitive adhesive force and the cohesive force. Further, it is preferable that the pressure-sensitive adhesive layer has sufficient elasticity so that the non-tacky or slightly tacky masking member can be positioned within the pressure-sensitive adhesive layer surface at the time of pressure bonding as described later. In addition, the non-adhesive or slightly adhesive masking member, which is a feature of the present invention, moves to the surface of the adhesive layer or inward of the surface, and the non-adhesive or slightly adhesive masking member other than the laminated portion is provided. In order to effectively press the pressure-sensitive adhesive layer surface against the adherend surface due to the compressive stress of the foam sheet, the elastic modulus of the pressure-sensitive adhesive layer is set higher than that of the foam sheet, that is, a hard material. It is necessary to be. From the above, the elastic modulus of the adhesive layer is 0.0
5 to 100 kg / cm ² , preferably 0.1 to 8
It is 0.0 kg / cm ² .

The pressure-sensitive adhesives constituting the pressure-sensitive adhesive layers 3 and 4 may be cross-linked with an appropriate cross-linking agent, and as such a cross-linking agent, isocyanate, aziridine-based cross-linking agent,
A metal complex compound or the like can be used.

The thickness of the pressure-sensitive adhesive layers 3 and 4 is not particularly limited, and varies depending on the application and the form and thickness of the non-tacky or slightly tacky masking member 5, but is usually about 50 to 100 μm. To be done.

In the structure shown in FIG. 1, the non-adhesive or slightly adhesive masking member 5 is shaped so as to uniformly and partially cover the surface of the adhesive layer 3. The planar shape of the non-adhesive or slightly adhesive masking member is projected from the surface 3a of the adhesive layer 3 and has an appropriate shape unless the adhesive force of the adhesive layer 3 is exerted. That is, it may be in the form of a lattice, or may be composed of a net or a porous sheet in which circular or other shaped openings are dispersedly formed.

For example, as shown in FIG. 3, a gauze 11 made of cotton yarn, a net made of synthetic resin in which square openings 12a are dispersedly formed as shown in FIG. 4, and a corner portion as shown in FIG. 13a with a rounded shape
An example is a net 13 made of a synthetic resin sheet having However, the shape of the opening in the non-adhesive or slightly adhesive masking member, that is, the shape of the portion that does not cover the adhesive layer is not limited to a square or a shape in which the corner portion of the square is rounded, and may be any other shape such as a circle. it can.

In the present invention, a non-adhesive or slightly adhesive material is used as the masking member, but the material constituting the non-adhesive masking member is not particularly limited, and a natural or synthetic fiber or synthetic resin is used. , Any material such as metal can be used, and more specifically, the above-mentioned cotton thread or synthetic resin fiber woven, mesh or net made of polyethylene, polypropylene or polyethylene terephthalate, or polyester fiber is used. A non-woven fabric, a metal mesh made of metal such as brass or stainless steel, or the like can be used.

As the slightly adhesive masking member,
An example of the non-adhesive masking member having a slightly tacky adhesive applied to the surface thereof. As the slightly tacky pressure-sensitive adhesive, all pressure-sensitive adhesives used for general protective tape can be used, and examples thereof include ethylene-vinyl acetate copolymer (EVA) -based pressure-sensitive adhesives and EVA / SBS (styrene-butadiene-styrene copolymer). Polymer) -based adhesives, acrylic-based adhesives, rubber-based adhesives, etc., and other special removable adhesives such as acrylic microsphere-based adhesives and polyoxypropylene-based adhesives. Can be mentioned.

The slightly tacky acrylic pressure-sensitive adhesive used in the present invention has, for example, an adhesion to a stainless steel plate or an adhesion to concrete of about 50 to 600 g / 25 mm, and a glass transition temperature of -60 to-. One having a gel fraction of 70% by weight or more at 40 ° C. may be mentioned.

The non-adhesive or slightly adhesive masking member is required to project from the surface of the pressure-sensitive adhesive layer when adjusting the position at the time of sticking, but at the time of pressure bonding,
It is moved to the surface of the pressure-sensitive adhesive layer and to the inside of the surface and no longer fulfills its function. Therefore, the thickness of the non-adhesive or slightly adhesive masking member is preferably as thin as possible so long as the above-mentioned action can be achieved. For example, when the non-adhesive or slightly adhesive masking member is made of gauze, it is 100 μm or less, About 30 if configured
It is about μm or less.

When a mesh made of various materials is used, if the mesh is too fine, the adhesive may not project sufficiently and the adhesive area may not be sufficiently secured.
It is preferable to use a mesh having as coarse a mesh as possible, for example, a mesh of 10 mesh or less. In the metal mesh,
A mesh made of brass is inexpensive and easily available, and is preferably used.

The ratio of the area of the portion of the non-adhesive or slightly adhesive masking member covering the adhesive layer to the total area of the surface of the adhesive layer, that is, the coverage is 12 to 60.
% Is preferable. If the coverage is less than 12%, even if a non-adhesive or slightly adhesive masking member is laminated, the pressure-sensitive adhesive layer surface tends to adhere to the surface of the adherend prior to pressurization. It becomes difficult to re-peel and adjust the position. On the other hand, when the coverage exceeds 60%, the position adjustment until the final adhesion is easy, but it becomes difficult to sufficiently adhere the pressure-sensitive adhesive layer surface to the adherend even when pressure is applied.

In addition, the non-adhesive masking material has a plurality of yarns extending in the longitudinal direction and the lateral direction so that the planar shape of the non-adhesive masking material can arrange the rectangular openings in a matrix as shown in FIGS. In the case of the bulged shape, the yarn width is preferably 0.5 to 5.0 mm and the yarn spacing is 1.0.
The thickness of the yarn is about 10.0 mm and about 10 μm. This is because it is possible to obtain sufficient removability and adhesiveness after pressurization by setting the width, interval and thickness of the yarn within the above-mentioned specific ranges, as will be apparent from the examples described below. .

The invention according to claim 4 is the above-mentioned claim 1.
The pressure-sensitive adhesive type pressure-sensitive adhesive sheet according to item 3 is laminated on one side of a decorative board so that the non-adhesive or slightly adhesive masking member is exposed, which is a pressure-sensitive adhesive laminated decorative board. The decorative board is not particularly limited. For example, in addition to building materials such as flooring materials, skirting boards, wall materials, ceiling materials, etc., plate-like materials exhibiting decorative properties in various applications such as vehicle interior materials. A member can be used.

[0041] In the pressure bonding pressure-sensitive adhesive sheet according to the action claim 1, the substrate 5
Compressive stress at 0% compression is 0.01 to 100 kg / cm ²
Of the foam sheet, and since the non-adhesive or slightly adhesive masking member is laminated on at least one of the pressure-sensitive adhesive layer surfaces so as to project, when adjusting the sticking position prior to pressing, Since the non-adhesive or slightly adhesive masking member only comes into contact with the surface to be adhered and the surface of the adhesive does not contact the surface to be adhered, the position can be freely adjusted. Further, when adhering the pressure-sensitive adhesive type pressure-sensitive adhesive sheet to the adherend, the non-adhesive or slightly adhesive masking member is moved by the applied pressure to the surface of the pressure-sensitive adhesive layer or to the inside of the surface, and the foam sheet Since one surface is bonded to the decorative board, the surface of the adhesive layer other than the part where the non-adhesive or slightly adhesive masking member is laminated should be pressed against the adhered surface by the compressive stress of the foam sheet. become. Therefore, the pressure-adhesive pressure-sensitive adhesive sheet can be easily and firmly attached to the adherend.

Further, in the pressure-sensitive adhesive type pressure-sensitive adhesive sheet, since the base material is made of the foam sheet, it is non-adhesive or slightly adhesive even if a winding pressure is applied when it is wound around a roll or the like. The adhesive masking member is moved inward from the surface of the adhesive layer, but since the foam sheet is highly flexible, the non-adhesive or slightly adhesive masking member does not sink into the adhesive layer and is wound. When pulled out from the take-up roll, the non-adhesive or slightly adhesive masking member is again projected to the surface of the adhesive layer by the repulsive force of the foam sheet.

In the pressure-sensitive adhesive laminated decorative board according to claim 4, since the pressure-adhesive pressure-sensitive adhesive sheet according to the present invention is formed on one side of the decorative board, the decorative board such as a building material is brought into contact with the attaching position. The sticking position can be accurately adjusted in this state, and by applying pressure thereafter, it is possible to easily and surely join to the pressing position.

[0044]

EXAMPLES The present invention will be made clear by describing non-limiting examples and comparative examples of the present invention.

Example 1 First, as a release paper, a release paper having a release treatment by laminating polyethylene on both surfaces of 80 g high quality paper (manufactured by San-A Chemical Co., Ltd., product name: WHW80) was prepared, and one side of the release paper was prepared. In order to make the thickness of the adhesive layer 100 μm, the adhesive (manufactured by Soken Chemical Co., Ltd., trade name: SK Dyne 801
B blended with Nippon Polyurethane Co., trade name: Coronate L55E at a solid content ratio of 1% by weight,
“Compressive stress at 50% compression = 20 kg / cm ² ”) was applied and dried at 100 ° C. for 2 minutes. Two pieces of release paper having the adhesive layer dried in this way were prepared, and the closed-cell polyethylene foam sheet (manufactured by Sekisui Chemical Co., Ltd.,
Product name: Softlon # 1001, thickness 1.0mm, 50
A double-sided pressure-sensitive adhesive sheet was produced by transferring the pressure-sensitive adhesive to both surfaces of which the compressive stress at the time of% compression was 1.58 kg / cm ² ).

After that, one of the release papers was peeled off, and a gauze having a plane shape shown in FIG. 3 was used as a non-adhesive masking member. In this gauze, the thread thickness is # 40, the rectangular opening is a square having a side length of 2 mm, and the gauze thickness is about 0.10 mm.

After the gauze as the non-adhesive masking member was attached, a release paper constructed in the same manner as above was further laminated thereon to obtain a pressure-adhesive adhesive sheet of Example 1.

Example 2 Instead of gauze as the non-adhesive masking member, as shown in FIG.
A pressure-sensitive adhesive type pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that a polyethylene molding net having a planar shape of (No. Sekisui Sof, trade name: Sof NA33) was used. In addition, the rectangular opening in the polyethylene molding net is a square having a side length of 7 mm, and the width of the portion sandwiched between the openings extending in the vertical direction and the horizontal direction is 2 mm, and the thickness is Is 0.03 mm.

Example 3 Instead of gauze as the non-adhesive masking member, FIG.
Thickness 1 made of urethane foam sheet with a planar shape
mm non-adhesive masking member (SD foam, manufactured by INOAC CORPORATION) was used.
A pressure-sensitive adhesive type pressure-sensitive adhesive sheet of Example 3 was produced in the same manner as in Example 1.

The length of one side of the substantially rectangular opening of the non-adhesive masking member made of the urethane foam sheet is about 10 mm, and the width of the portion sandwiched by the rectangular openings and extending in the vertical and horizontal directions. Is 5 mm.

Example 4 After laminating the gauze in Example 1, spray paste ZERO (Strong) manufactured by Sekisui Chemical Co., Ltd. was sprayed on the surface of the gauze to make the masking member slightly sticky, and the other examples 1 A pressure-sensitive adhesive type pressure-sensitive adhesive sheet of Example 4 was produced in the same manner as in.

Example 5 The procedure of Example 1 was repeated, except that spray paste ZERO (Strong) manufactured by Sekisui Chemical Co., Ltd. was sprayed on the surface of the polyethylene molding net to make the masking member slightly sticky. A pressure-sensitive adhesive type pressure-sensitive adhesive sheet was produced in the same manner as in Example 2.

Example 6 In Example 3, on the surface of the urethane foam sheet as the non-adhesive masking member, Sekisui Chemical Co., Ltd.,
A pressure-sensitive adhesive type pressure-sensitive adhesive sheet was produced in the same manner as in Example 3 except that spray paste ZERO (Strong) was sprayed to make the masking member slightly adhesive.

Comparative Example 1 A pressure-adhesive pressure-sensitive adhesive sheet was prepared in the same manner as in Example 1 except that no non-adhesive or slightly adhesive masking member was laminated. It was used as a pressure-sensitive adhesive sheet.

Evaluation of Examples 1 to 6 and Comparative Example 1 (1) Initial Adhesive Strength of Stainless Plate: Side where the pressure-sensitive adhesive type pressure-sensitive adhesive sheets of Examples 1 to 6 are laminated on the stainless plate ( From the front surface side), a roller of 200 g was repeatedly reciprocated and pressure-bonded, and after that, the initial adhesive force to the stainless steel plate was measured by measuring the force when peeling the adhesive sheet. Further, regarding the pressure-sensitive adhesive type pressure-sensitive adhesive sheets of Examples 1 to 6, the initial adhesive force to the stainless steel plate was similarly measured on the pressure-sensitive adhesive layer side (back side) on the opposite side. Also in Comparative Example 1, the initial adhesive strength was measured in the same manner.

(2) Adhesive strength to stainless steel plate after pressurizing the pressure-sensitive adhesive type pressure-sensitive adhesive sheets of Examples 1 to 6 on the surface of the stainless steel plate from the side (front surface side) on which the masking member is laminated. The layers were overlapped and pressure-bonded by reciprocating a 2 kg roller once, and then the adhesive force after pressing was measured. Moreover, regarding the pressure-sensitive adhesive type pressure-sensitive adhesive sheets of Examples 1 to 6, the adhesive force after pressure was similarly measured on the pressure-sensitive adhesive layer side (back side) on the opposite side where the masking member is not laminated. . In Comparative Example 1, a sheet was attached from one or the other of the pressure-sensitive adhesive layers that were not provided with a masking member, and the adhesive force after pressing was measured in the same manner.

(3) Splitting strength: As shown in FIGS. 6 (a) and 6 (b), 70 JAS2 grade lauan material having a thickness of 5 mm was used.
The pressure-sensitive adhesive type pressure-sensitive adhesive sheet is attached to the lower surface of the board 21 cut into a dimension of 100 mm from the pressure-sensitive adhesive layer on the side where the non-adhesive or slightly adhesive masking member is not laminated, and a secondary adherend As shown in FIG. 6 (b), the gypsum board 22 is laminated on the upper surface of the adhesive layer on which the masking member is laminated, and a load of 1 kg or 5 kg is applied for 20 minutes. The splitting strength of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet was measured by pulling in the direction of arrow A.

(4) Re-sticking property ... The presence or absence of paper scraping on the surface layer portion of the gypsum board was visually evaluated at the load of 1 kg and at the load of 5 kg in the splitting strength test. When the paper peeling did not exist, it was marked with O, and when the paper peeling occurred, it was marked with X.

The above evaluation results are shown in Tables 1 and 2 below together with the thickness of the entire pressure-sensitive adhesive sheet.

[0060]

[Table 1]

[0061]

[Table 2]

As is clear from Table 2, in Comparative Example 1,
Since no masking member was used, the initial adhesive strength was very high, and when the above-mentioned splitting strength was evaluated, peeling of the paper was observed on the surface of the gypsum board, and therefore it can be seen that the rebondability is not sufficient.

(Examples 7 and 8 and Comparative Examples 2 and 3) In Examples 7 and 8, the influence of the winding pressure when the pressure-adhesive pressure-sensitive adhesive sheet was wound into a roll was evaluated.

Example 7 The release paper was coated with the pressure-sensitive adhesive used in Example 1 so that the pressure-sensitive adhesive layer had a thickness of 75 μm, and dried at 100 ° C. for 2 minutes. Next, as a substrate, Sekisui Chemical Co., Ltd. used in Example 1, Softlon # 1001 (stress at 50% compression =
1.58 kg / cm ² ) was prepared, and the dried pressure-sensitive adhesive layer was transferred to both surfaces of the substrate in the same manner as in Example 1 to prepare a double-sided pressure-sensitive adhesive tape. Next, on one of the pressure-sensitive adhesive layers of the pressure-sensitive adhesive tape, gauze having a basis weight of 20 g / m ² , a thickness of 0.10 mm, and a size of 6 mm × 6 mm was laminated as a non-adhesive masking member, and the addition of Example 7 was performed. The pressure-sensitive adhesive sheet was used.

Example 8 The non-adhesive masking member was replaced with gauze, and a product name: Sof NA33 manufactured by Sekisui Sof Co., Ltd. (a net made of polyethylene having a thickness of 0.03 mm and a rectangular opening of 7 mm) was used. A pressure-sensitive adhesive pressure-sensitive adhesive sheet was produced in the same manner as in Example 7 except that was used.

Comparative Example 2 A non-woven fabric SPC (14 g / m ² , 50% compressive stress = 100 kg / cm ² ) manufactured by Nippon Paper Industries Co., Ltd. was used in place of Softlon # 1001 as the base material. A pressure-sensitive adhesive type pressure-sensitive adhesive sheet was produced in the same manner as in Example 7.

Comparative Example 3 Non-woven fabric SPC manufactured by Nippon Paper Industries Co., Ltd. (base weight 14 g /
A pressure-sensitive adhesive type pressure-sensitive adhesive sheet was produced in the same manner as in Example 8 except that m ² , 50% compression stress = 100 kg / cm ² ) was used. Examples 7 and 8 and Comparative Example 2 above
The pressure-sensitive adhesive type pressure-sensitive adhesive sheet of No. 3 was wound on a roll after production and aged at 23 ° C. and 65% relative humidity for 1 week.

Evaluation of Examples 7 and 8 and Comparative Examples 2 and 3 The pressure-adhesive pressure-sensitive adhesive sheet aged as described above was pulled out from the roll, and in the same manner as in Example 1, (1) Stainless steel plate initial adhesive strength , (2) Adhesive force to the stainless steel plate after pressure application, and (3) Splitting strength were evaluated.

In order to confirm the difference between the outer portion of the winding roll and the portion near the winding core, in each of the pressure-sensitive adhesive type pressure-sensitive adhesive sheets of Examples 7 and 8 and Comparative Examples 2 and 3, the surface layer of the winding roll was used. The above-mentioned evaluation was carried out for the partial sample and the core side sample. The results are shown in Tables 3 and 4 below. Table 3 shows the evaluation results of the sample on the surface layer side of the winding roll, and Table 4 shows the evaluation results of the sample on the winding core side.

In addition, Examples 7 and 8 and Comparative Examples 2 and 3
The position correction function of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet of was evaluated in the following manner. Position correction function evaluation: The board 21 made of JAS2 class lauan material and the double-sided adhesive tape, which were produced in the evaluation of the splitting strength of (3), were placed horizontally on the glass plate from the side where the masking members were laminated. It was evaluated whether the direction could be manually shifted. The evaluation results are shown in Tables 3 and 4 below. In Tables 3 and 4, a symbol "O" is given when the sheet is displaced by hand, and an symbol "X" is provided when the sheet is not displaced.

[0071]

[Table 3]

[0072]

[Table 4]

As is clear from Tables 3 and 4, in Examples 7 and 8, the initial adhesive strength was low and the position could be adjusted sufficiently, and the adhesive strength after pressing was 1300 g / 25 m.
m or more, which is sufficient, and the splitting strength after pressing is also sufficient.

On the other hand, in Comparative Examples 2 and 3, the initial adhesive force was low and the position could be corrected sufficiently, but the adhesive strength and splitting strength after pressing were insufficient. Examples 9 to 15 In the pressure-adhesive pressure-sensitive adhesive sheet of the present invention, it was confirmed how the coverage of the non-adhesive or slightly adhesive masking member affects the removability.

Except that polyethylene molding nets (manufactured by Sekisui Sof Co.) having various shapes shown in Table 5 were used.
A pressure-sensitive adhesive type pressure-sensitive adhesive sheet was obtained in the same manner as in Example 2. The removability was evaluated as follows.

(1) Evaluation of removability: The splitting strength when a load of 1 kg was applied was measured in the same manner as in Examples 1-6. ◎: Less than 1 kg ○: 1 kg or more and less than 3 kg △: 3 kg or more and less than 5 kg ×: 5 kg or more

(2) Evaluation of adhesiveness after pressurizing ... Examples 1 to 1
The splitting strength when a load of 5 kg was applied was measured in the same manner as in 6. ◎: 15 kg or more ○: 10 kg or more and less than 15 kg △: 5 kg or more and less than 10 kg ×: less than 5 kg

[0078]

[Table 5]

As is clear from Table 5, when the coverage of the pressure-sensitive adhesive surface is less than 12%, sufficient removability due to initial pressure bonding cannot be obtained, and when it exceeds 60%, the adhesiveness after pressurization is sufficient. Will not be obtained. Therefore, the coverage rate is 12 to 6
By setting the content to 0%, it is possible to obtain a pressure-adhesive pressure-sensitive adhesive sheet that highly retains both removability due to initial pressure bonding and adhesiveness after pressing.

[0080]

As described above, in the invention described in claim 1, the pressure-sensitive adhesive layer is laminated on both surfaces of the foam sheet having a compressive stress at 50% compression in the above-mentioned specific range, and at least Since a non-adhesive or slightly adhesive masking member is laminated on one adhesive layer so as to protrude from the surface of the adhesive layer, the non-adhesive or slightly adhesive material is first applied when applied to an adherend. The masking member abuts, and the adhesive force of the adhesive layer is not exhibited. Therefore, the position of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet can be freely corrected in the state of being brought into contact with the adherend, and re-peeling is easy. Further, in pressure bonding after position adjustment, the foam sheet is compressed by the applied pressure, and the pressure-sensitive adhesive layer press-bonds the pressure-sensitive adhesive layer to the adherend surface, and also non-adhesive or slightly adhesive masking. Since the member is located on the surface of the pressure-sensitive adhesive layer or inside the surface, the pressure-adhesive pressure-sensitive adhesive sheet is strongly adhered to the adherend.

In addition, since the pressure-sensitive adhesive type pressure-sensitive adhesive sheet of the present invention uses the foam sheet as described above, for example, even if it is stored in a state of being wound on a winding roll, it is wound. When pulled out from the take-up roll, the non-adhesive or slightly adhesive masking member is surely projected onto the adhesive surface by the repulsive force of the foam sheet. Therefore, it becomes possible to provide a pressure-adhesive pressure-sensitive adhesive sheet capable of exhibiting removability and pressure-adhesiveness to an adherend in the form of a winding roll.

In the invention according to claim 4, since the pressure-adhesive pressure-sensitive adhesive sheet is preliminarily laminated on one surface of the decorative board, a decorative board having the pressure-adhesive pressure-sensitive adhesive sheet laminated thereon can be used, for example, as a building. It can be attached to the structure in a precise position and reliably.

[Brief description of drawings]

FIG. 1 is a partial cutaway sectional view for explaining a pressure-adhesive pressure-sensitive adhesive sheet of the present invention.

FIG. 2 is a partial cutaway sectional view for explaining a deformed state of the pressure-sensitive adhesive type pressure-sensitive adhesive sheet of the present invention when pressure-bonded to an adherend.

FIG. 3 is a plan view for explaining an example of a non-adhesive or slightly adhesive masking member.

FIG. 4 is a plan view for explaining another example of a non-adhesive or slightly adhesive masking member.

FIG. 5 is a plan view for explaining still another example of a non-adhesive or slightly adhesive masking member.

6A and 6B are a perspective view and a side view for explaining a test method for evaluating the split adhesive strength in Examples.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure-adhesive adhesive sheet 2 ... Foam sheet 3, 4 ... Adhesive layer 5 ... Non-adhesive or slightly adhesive masking member

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location E04F 13/08 8913-2E E04F 13/08 G

Claims (4)

[Claims] 1. The compressive stress at 50% compression is 0.01 to 1.
A pressure-sensitive adhesive layer is formed on both sides of a foam sheet of 00 kg / cm ² , and at least one pressure-sensitive adhesive layer surface is formed so as to protrude from the surface and partially cover the pressure-sensitive adhesive layer surface. A pressure-sensitive adhesive type pressure-sensitive adhesive sheet, characterized in that a non-adhesive or slightly adhesive masking member is laminated on. 2. At the time of pressure bonding, the non-adhesive or slightly adhesive masking member can be positioned on the surface of the pressure-sensitive adhesive layer or the outer surface thereof inside the surface of the pressure-sensitive adhesive layer due to compression deformation of the foam sheet. When the pressure is released prior to the bonding and after the pressure is released, the deformation of the foam sheet is recovered and the non-adhesive or slightly adhesive masking member is re-applied to the surface of the non-adhesive layer. The pressure-adhesive pressure-sensitive adhesive sheet according to claim 1, wherein the foam sheet is configured to protrude from the pressure-sensitive adhesive sheet. 3. The non-adhesive or slightly adhesive masking member is made of a material selected from the group consisting of gauze, non-woven fabric, woven fabric, metal mesh, and molding net. Pressure-adhesive adhesive sheet. 4. The pressure-sensitive adhesive pressure-sensitive adhesive sheet according to claim 1, wherein the non-adhesive or slightly adhesive masking member is exposed to the outside on one surface of a decorative board. An adhesive laminated decorative board characterized by the above.