JP2001115114A - Decorative laminate temporarily fixing pressure- sensitive double-coated adhesive tape and method of bonding decorative laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a decorative laminate temporarily fixing pressure-sensitive double-sided adhesive tape which securely enables temporary fixing of a decorative laminate while easily adjusting the position of the decorative laminate to a substrate material even if the decorative laminate is easy to deflect and easy to bend in operation. SOLUTION: This decorative laminate temporarily fixing pressure-sensitive double-sided adhesive tape is obtained by laminating pressure-sensitive adhesive layers 3 and 4 each having a thickness of 9-20% thickness of a support 2 on both sides of the support 2 having a compressive stress, when 25% compressed, of 0.3-5 N/cm2 and a thickness of 0.5-3 mm, respectively, the ball tack of the pressure-sensitive adhesive layers being not less than 32, and a non-tacky or slightly tacky masking member 5 having a thickness of 10-100% thickness of the support 2 being laminated on the surface 3a of at least one of the pressure- sensitive adhesive layers 3 at a coverage ratio of 6-40%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate used for bonding a decorative plate to a base material such as a gypsum board, and a method for bonding the decorative plate. Even when a thin decorative board is fixed, a double-sided pressure-sensitive adhesive tape for temporary fixing of a decorative board and a method of bonding the decorative board, which can easily and reliably temporarily fix the decorative board to the base material while adjusting the position. About.

[0002]

2. Description of the Related Art Conventionally, in finishing a wall of a building, a method of bonding a decorative board to a surface of a wall base material such as a gypsum board has been frequently used. When a decorative board is fixed to a base material using an adhesive, it is necessary to temporarily fix the decorative board to the base material until the adhesive hardens.

[0003] Therefore, as described in Japanese Patent Application Laid-Open No. 4-312671, there has been proposed a bonding method in which a decorative plate is temporarily fixed to a base material using a double-sided adhesive tape and then permanently fixed with an adhesive.

[0004]

However, the bonding method described in Japanese Patent Application Laid-Open No. 4-312671 is suitable for applying a relatively thick decorative panel, but is suitable for applying a thin decorative panel. Had the following problems.

[0005] That is, when a thin decorative plate having a relatively large area is bonded to a base material, such a thin decorative plate lacks rigidity and is easily curved. Therefore, when applying a double-sided adhesive tape to a decorative board and trying to contact a base material such as a gypsum board, the double-sided adhesive tape comes into contact with the base material in a portion curved toward the base material and does not come off. was there. If the double-sided pressure-sensitive adhesive tape once adheres to a base material such as a gypsum board and becomes difficult to peel off, the decorative board can no longer be shifted in the surface direction in that state, and position adjustment becomes impossible.

[0006] Therefore, in the above-mentioned conventional method, a plurality of workers are required to pay close attention and temporarily fix the decorative board along the marking line provided on the base material while temporarily fixing the decorative board. Work was being forced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and it is possible to easily temporarily fix a thin decorative board to a base material using a double-sided adhesive tape even if it is a thin decorative board which is easily bent and easily bent during construction. It is another object of the present invention to provide a double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate and a method for bonding the decorative plate, which can easily perform position adjustment at the time of temporary fixing.

[0008]

The double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative board according to the present invention has a compressive stress of 0.2% at 25% compression.
A foam having a thickness of 3 to 5 N / cm ² and a thickness of 0.5 to 3 mm is used as a support.
An adhesive layer having a thickness of 20% is laminated,
At least one side of the double-sided adhesive tape having a ball tack of SZ1528 not less than 32 has a coverage of 6 to 40.
%, Characterized in that a non-adhesive or slightly adhesive masking member having a thickness of 10 to 100% of the thickness of the support is laminated.

The method for bonding a decorative board according to the present invention comprises the steps of: affixing the double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative board according to the present invention to the back of the decorative board; A step of applying an adhesive to a region other than the portion where the adhesive tape is stuck; a step of adjusting the position of the decorative board by overlapping the decorative board so that the masking member comes into contact with a base material; Pressurizing the board toward the base material, bonding the pressure-sensitive adhesive layer of the double-sided pressure-sensitive adhesive tape for temporary fixing of the decorative board to the base material, temporarily fixing the adhesive, and then curing the adhesive.

Hereinafter, the present invention will be described in detail. (Double-sided pressure-sensitive adhesive tape for temporarily fixing decorative plate) The double-sided pressure-sensitive adhesive tape for temporarily fixing decorative plate according to the present invention has a structure in which the above specific foam is used as a support, and an adhesive layer is laminated on both surfaces of the support. Have. That is, it has the same structure as the conventional double-sided pressure-sensitive adhesive tape.

However, a non-adhesive or lightly-adhesive masking member is laminated on at least one of the surfaces of the pressure-sensitive adhesive layer so as to protrude from the surface, so that a position adjusting function is achieved. ing. This will be described with reference to FIGS.

FIG. 1 is a sectional view for explaining an example of the structure of the double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate. In the double-sided pressure-sensitive adhesive tape 1 for temporarily fixing a decorative plate, pressure-sensitive adhesive layers 3 and 4 are laminated on both sides of the support 2, and the surface 3 a of the pressure-sensitive adhesive layer 3 is formed.
The non-adhesive or slightly adhesive masking member 5 is partially laminated. Therefore, when the pressure-sensitive adhesive layer 3 is brought into contact with the adherend without pressing, only the non-adhesive or slightly adhesive masking member 5 comes into contact. Therefore, in this state, the double-sided adhesive tape 1 for temporarily fixing the decorative board can be shifted. Next, after adjusting the position, when the double-sided pressure-sensitive adhesive tape for temporary fixing of the decorative sheet is pressed against the adherend side, as shown in FIG. And the surface 3a of the pressure-sensitive adhesive layer 3 comes into contact with and adheres to the adherend.

Therefore, when the double-sided pressure-sensitive adhesive tape 1 for temporarily fixing the decorative sheet is adhered to the back surface of the decorative sheet from the side of the adhesive layer 4 and the decorative sheet is fixed to a wall base material or the like, first, non-adhesive or slightly adhesive masking is performed. By adjusting the position in a state where the member 5 is in contact and then applying pressure from the decorative board, the decorative board can be securely fixed to the wall base material or the like.

In the double-sided pressure-sensitive adhesive tape for temporarily fixing the decorative plate, the non-adhesive or slightly-adhesive masking member 5 forms the surface 3a of the pressure-sensitive adhesive layer 3 due to a local pressing force applied to the decorative plate or a partial warp. It is necessary to configure so as not to sink below. Further, after the pressure bonding operation, the support 2 needs to be configured to have sufficient flexibility so that the masking member 5 can be absorbed below the surface 3a of the pressure-sensitive adhesive layer 3.

In the present invention, from the above viewpoint, the support has a compressive stress at 25% compression of 0.3 to 5 N / c.
Those having a range of m ² are used. That is, if the compressive stress is less than 0.3 N / cm ² , when the decorative board is laminated on a wall base material or the like, the surface of the pressure-sensitive adhesive layer covered by the masking member adheres to the other member, and the position adjusting function is provided. Cannot be exhibited. On the other hand, when the compressive stress is 5 N / cm ²
If it exceeds, the position adjusting function is fulfilled, but it may be difficult to prevent the floating or peeling due to the warpage of the decorative board.

That is, the compressive stress is set to 0.3 to 5 N /
By having a range of cm ² , it has moderate flexibility,
Therefore, the decorative board can be securely bonded to the wall base material or the like with a relatively small pressure, and the position adjusting function can be reliably performed.

The material constituting the support is not particularly limited, but a polyolefin-based or polyurethane-based foam may be used, and a closed-cell foam may be used. It may be a cellular foam or an open-cell foam. Generally, a foam called a soft or semi-rigid type is suitably used. Preferably, in order to enhance the sound insulation, an open-cell foam is used.

The expansion ratio of the support may be appropriately selected within a range that can satisfy the above-mentioned compressive stress, and is not particularly limited. Further, the thickness of the support is 0.5 to 3 mm. If the thickness of the support is too thin, it may not follow irregularities (uneven portions) of the base material, and if it is too thick, a step may be formed and the appearance may be conspicuous.

The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer formed on both surfaces of the support is not particularly limited, and is mainly composed of an adhesive polymer such as an acrylic, natural rubber, synthetic rubber, or silicone adhesive. An appropriate adhesive can be used. However, it is preferable to use an acrylic pressure-sensitive adhesive because it is excellent in durability and has little stain during handling.

However, the pressure-sensitive adhesive layer is made of JIS Z1
It is necessary that the ball tack according to 528 be configured not to be less than 32. When the ball tack falls below 32, the dust required at the site cannot provide the adhesive strength required for temporary fixing.

In consideration of the adhesion to the decorative board and the construction in the cold season, the glass transition point T
g is preferably 0 ° C. or lower, more preferably −
20 ° C. or less.

The thickness of the pressure-sensitive adhesive layer is in the range of 9 to 20% of the thickness of the support. 9% thick adhesive layer
If less, the adhesion at a relatively small pressure is poor,
If it exceeds 20%, the pressure-sensitive adhesive exudes from the side, which may cause practical problems.

The pressure-sensitive adhesive layers formed on both sides of the support may be the same or different. In the present invention, the above-mentioned non-adhesive or slightly-adhesive masking member is laminated on at least one of the adhesive layers. The non-tacky or slightly tacky masking member is formed so as to protrude from the surface of the pressure-sensitive adhesive layer and to cover 6 to 40% of the surface of the pressure-sensitive adhesive layer. If the outer surface of the masking member does not protrude beyond the surface of the pressure-sensitive adhesive layer, the position adjusting function cannot be achieved. In addition, when the masking member is laminated so as to have a coverage of less than 6% of the pressure-sensitive adhesive layer surface, a sufficient position adjustment function cannot be performed, and the pressure-sensitive adhesive layer surface is applied to the adherend with a small pressure. You will be in contact. Conversely, if the covering ratio of the masking member exceeds 40%, it is difficult to sufficiently temporarily fix the decorative board to the wall base material or the like even if the decorative board is pressed against the wall base material or the like.

Further, the thickness of the masking member is in the range of 10 to 100% of the thickness of the support. If the thickness of the masking member is less than 10%, the effect of masking the pressure-sensitive adhesive layer by the masking member cannot be sufficiently obtained. If the thickness exceeds 100%, the pressure-sensitive adhesive layer will not adhere even if pressure is applied during temporary fixing. Does not adhere sufficiently to materials. A particularly preferred thickness is 10 to 50%.

The material constituting the non-sticky or slightly sticky masking member is not particularly limited as long as it is non-sticky or slightly sticky. In the structure shown in FIG. 2, 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 protrudes from the surface 3a of the pressure-sensitive adhesive layer 3, and has an appropriate shape as long as the pressure-sensitive adhesive layer 3 does not exhibit the adhesive force. That is, it may be in a lattice shape, or may be constituted by a net or a porous sheet in which openings of circular or other shapes are dispersedly formed.

In the present invention, a non-adhesive or slightly-adhesive masking member is used. However, the material constituting the non-adhesive masking member is not particularly limited, and natural or synthetic fibers, synthetic resin Any material such as metal can be used, and more specifically, the above-described knitted cotton yarn or synthetic resin fiber, a mesh or net made of polyethylene, polypropylene, polyethylene terephthalate, or the like, configured using polyester fiber A nonwoven fabric made of any material such as a metal mesh made of a metal such as brass or stainless steel can be used.

Further, as the slightly adhesive masking member,
Examples of the non-adhesive masking member include a surface having a slightly adhesive pressure-sensitive adhesive. As this slightly tacky pressure-sensitive adhesive, all pressure-sensitive adhesives and the like used for general protect tapes can be used. For example, ethylene-vinyl acetate copolymer (EVA) -based pressure-sensitive adhesives, EVA / SBS (styrene-
Butadiene-styrene copolymer) -based pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, and other special removable adhesives such as acrylic microsphere-shaped pressure-sensitive adhesives and polyoxypropylene-based pressure-sensitive adhesives. Adhesives and the like are also included.

In the present invention, the outer surface of the pressure-sensitive adhesive layer on which the pressure-sensitive adhesive layer and the masking member are laminated is usually covered with release paper. As the release paper, those conventionally used as release papers for adhesive tapes can be appropriately used. For example, the base material is kraft paper, semi-bleached paper, high-quality paper, glassine paper, plastic film such as polyethylene, polypropylene, polyethylene terephthalate, etc., and a sealing material is laminated on the surface thereof, and then released with a silicone release agent. Molded ones can be used. Regarding the basis weight of the release paper, if the basis weight is too small, the release paper may be torn when the release paper is peeled off, and if the basis weight is too large, the entire thickness of the double-sided adhesive tape for temporary fixing of the decorative board becomes too thick. About 150 g / m ² is preferable. The thickness of the release paper is 70 to 150 μm so that it can be picked up with a fingertip or a nail and easily peeled off.
A range of about m is preferable.

(Adhesion Method for Decorative Plate) In the method for bonding a decorative plate according to the present invention, the double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate according to the present invention is used when the decorative plate is bonded and fixed to a base material.

That is, first, the double-sided adhesive tape for temporarily fixing the decorative plate is attached to the back surface of the decorative plate. In this case, when the masking member is laminated on both sides of the double-sided pressure-sensitive adhesive tape for temporarily fixing the decorative plate, the masking member is first brought into contact with the back surface of the decorative plate, and in this state, the adhesive layer is placed on the back surface of the decorative plate. , So that the position can be adjusted by shifting the double-sided adhesive tape in the surface direction. After a while
After the position adjustment, the double-sided pressure-sensitive adhesive tape for temporarily fixing the decorative plate may be pressed against the back surface of the decorative plate and attached.

When the masking member is laminated only on the adhesive layer on one side of the double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate, the double-sided pressure-sensitive adhesive tape for temporarily fixing the decorative plate is applied from the side where the masking member is not laminated. Affix to the back of the decorative board.

Next, an adhesive is applied to a region other than the portion where the double-sided pressure-sensitive adhesive tape for decorative-plate fixing is adhered on the back surface of the decorative plate. As an adhesive that can be used, an appropriate adhesive conventionally used for bonding a decorative plate to a base material such as a wall base material can be used. However, to avoid contamination of the work environment and to prevent fire,
It is preferable to use a solventless adhesive that does not contain a solvent. Examples of such a solventless adhesive include various adhesives such as a silicone adhesive, a modified silicone adhesive, a polysulfide adhesive, a modified polysulfide adhesive, a modified silicone-epoxy adhesive, a urethane adhesive, and an epoxy adhesive. However, in order to obtain sufficient adhesive strength, it is preferable to use a modified silicone-based, modified silicone-epoxy-based or urethane-based solventless adhesive.

The adhesive may be of a one-pack type or a two-pack type. Examples of the modified silicone-epoxy adhesive include, for example, a two-part adhesive disclosed in Japanese Patent Publication No. Sho.
One-part adhesive disclosed in Japanese Patent No. 3629 can be used.

The method of applying the adhesive when applying the adhesive to the back surface of the decorative board is not particularly limited.
Further, when applying the adhesive, it is desirable to use an adhesive having a relatively high viscosity in order to prevent excess adhesive from dripping.

The coating amount (thickness) of the adhesive is preferably equal to or more than 50% of the thickness of the double-sided pressure-sensitive adhesive tape. Next, the decorative board is superimposed on the base material so that the masking member of the double-sided adhesive tape for temporary fixing of the decorative board is adhered, and the position of the decorative board is adjusted in that state. In this case, since the masking member protrudes from the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer does not directly contact the base material.
Therefore, the decorative plate can be easily shifted in the surface direction on the base material, and the position of the decorative plate can be surely adjusted.

At this time, although the adhesive layer also comes into contact with the base material, it can easily flow in an uncured state, so that it does not hinder the position adjustment. After the above position adjustment, the decorative board is pressed against the base material side, and the adhesive layer of the double-sided pressure-sensitive adhesive tape for temporarily fixing the decorative board is bonded to the base material, thereby completing the temporary fixing. Thereafter, the decorative board is bonded and fixed to the base material by curing the adhesive.

In curing the adhesive, an appropriate operation, for example, a heat treatment may be performed according to the adhesive to be used. In addition, about the material which comprises the decorative panel to which this invention is applied, the appropriate decorative panel conventionally used for the interior of a building can be used, and it is not specifically limited. Examples of such a decorative board include a melamine decorative board, an MDF decorative board, and a decorative keika board.

However, in the case of a relatively thin decorative plate having a thickness of 5 mm or less, the rigidity is lacking, so that it is likely to bend at the time of work, and it is difficult to temporarily fix it.
INDUSTRIAL APPLICABILITY The method for bonding a double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate and a decorative plate according to the present invention can be suitably used for bonding a decorative plate having a thickness of 5 mm or less to a base material.

The base material to which the decorative board is bonded in the method for bonding a decorative board according to the present invention can also be an appropriate base material used as an interior base material of a building, such as a gypsum board or a mortar wall. , Tile walls, plywood walls, and the like.

In the bonding method according to the present invention, the double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate according to the present invention is first attached to the decorative plate side. Alternatively, the veneer may be used by a method in which a decorative plate is superimposed on the pressure-sensitive adhesive layer, which has been previously stuck on the base material side and the masking member is exposed, to adjust the position, and to apply pressure.

(Function) In the double-sided pressure-sensitive adhesive tape for temporarily fixing decorative boards according to the present invention, a foam having the above-mentioned specific compressive stress and thickness is used as a support, and the pressure-sensitive adhesive layers having the above-mentioned specific thickness are provided on both sides of the support. Non-adhesive or light-adhesive masking of a specific thickness such that the coverage is 6 to 40% on at least one side of the double-sided pressure-sensitive adhesive tape which is laminated and has a ball tack and a holding force of the above specific values. Since the members are laminated, when the decorative board is temporarily fixed to the base material, when the decorative board or the base material is contacted from the masking member side,
When the masking member is in contact, the pressure-sensitive adhesive layer does not contact the base material or the decorative plate. Therefore, in that state, the position can be adjusted by shifting the decorative board in the surface direction with respect to the base material. After the position adjustment, the pressure-sensitive adhesive layer on the side where the masking member is laminated adheres to the base material or the decorative board by pressing the decorative board to the base material side, and after the position of the decorative board is easily adjusted. , Can be temporarily fixed securely.

In the method for bonding a decorative board according to the present invention, the decorative board is temporarily fixed at a correct position using the double-sided adhesive tape for temporary fixing of the decorative board as described above, and in this state, the decorative board is applied to the back surface of the decorative board. The adhesive which has been cured is thus securely fixed to the base material at the correct position.

[0043]

The present invention will be more specifically described below with reference to non-limiting examples.

(1) Preparation of double-sided pressure-sensitive adhesive tape for temporary fixing of decorative board Supports Supports a to c made of the following foams were prepared.

Support a: polyethylene foam manufactured by Sekisui Chemical Co., Ltd., trade name: Softlon # 2001, compressive stress at 25% compression 5 N / cm ² , thickness: 1.0 mm Support b: polyethylene manufactured by Sekisui Chemical Foam, trade name: Softlon # 0501, compressive stress 2 at 25% compression
3N / cm ² , 1.0 mm thickness Support c: Ether type urethane foam manufactured by Inoac Corporation, trade name: SD foam, compressive stress at 25% compression 0.02 kg / cm ² , 1.0 mm thickness Support d: Polyethylene foam manufactured by Sekisui Chemical Co., Ltd., trade name: Softlon # 20005, compressive stress at 25% compression 5 N / cm ² , thickness 0.45 mm Support e: polyethylene foam manufactured by Sekisui Chemical Co., trade name: soft Ron # 3004, compressive stress at 25% compression 1
N / cm ² , thickness 3.50 mm

Adhesives The following adhesives A and B were prepared. Adhesive A: Acrylic adhesive manufactured by Soken Chemical Co., trade name: S
K Dyne 801B (manufactured by Nippon Polyurethane Co., Ltd. as a curing agent, trade name: 1% by weight of Coronate L-45 added to the main agent), glass transition point = -25 ° C Adhesive B: acrylic adhesive manufactured by Soken Chemical Company Agent, trade name: S
K Dyne 1700 (comprising 0.9% by weight of coronate L-45 as a curing agent based on the main component), glass transition point = 5 ° C.

Non-adhesive or Slightly Adhesive Masking Member The following masking members I to C were used so as to have the following coverage. Masking member i: Sekisui Chemical Co., Ltd. polyethylene net, trade name: Sof HN33, thickness 60μ
m, the coverage ratio is 32%, the net shape has two axes, the fiber width is 1.5 mm, and the shape of the opening of the net is rectangular;
The width of one opening is 7 mm. Masking member b. Polyethylene net manufactured by Sekisui Chemical Co., Ltd., product number: TS610, coverage 36%, thickness 180 μm, net shape is triaxial,
Fiber width 1.2 mm, shape of opening of net is triangular, width of one opening is 7 mm Masking member C ... Nippon sheet pallet polypropylene net, product number: Nisseki #
5340, coverage 6%, thickness 500 μm, number of axes of the net is 2 axes, fiber diameter 200 μm, shape of the opening of the net is rectangular, width of one opening is 6 mm Release paper: manufactured by San-A Chemical Co., Ltd. Product number: WHT80 (80
g of a high-quality paper having a basis weight of 2 g on both sides laminated with polyethylene) Preparation Any of the above-mentioned adhesives A or B is applied on release paper so that the thickness after drying becomes 100 μm, and 100 ° C.
For 3 minutes, dried and then transfer-laminated to each support. An adhesive layer was similarly formed on the opposite surface of the support to obtain a double-sided adhesive tape. After curing this double-sided pressure-sensitive adhesive tape at 23 ° C. for one week, one of the release papers was peeled off, the above-mentioned respective masking members were bonded together, and the release paper was further laminated on the masking member to obtain a test sample.

(2) Evaluation The test sample obtained as described above was tested for ball tack, holding power and ceiling adhesion test, and position adjustability in the following manner.

Ball tack: The ball tack was measured according to JIS Z1528. Holding power: The holding power of the pressure-sensitive adhesive layer was evaluated according to JIS Z1528. Ceiling adhesion test: 20 m on one surface of ceiling material (manufactured by Aika Kogyo Co., Ltd., product name: Cerarl, 909 x 909 x 5 mm thick)
An m-width test sample was peeled off from one release paper and affixed in the shape of a cross at the center of a 30 mm area from the corner of the ceiling material, but from the side where the masking member was not laminated. After that, plaster board for ceiling construction (1m ×
(1m × 12mm thick) is overlapped from below and pressed upward,
Gypsum board was applied at a temperature of 0 ° C. After being left for 24 hours, the temperature was raised to 40 ° C., and then left for another 24 hours. next,
The gypsum board / ceiling material was visually observed for peeling. When the gap between the gypsum board and the ceiling material was 5 mm or more, it was determined that the gypsum board was peeled off. It should be noted that even if this peeling was partial, it was determined that there was floating.

Position Adjustability Veneer (Aika Kogyo Co., Ltd., trade name: Cellar 909 × 9)
A test sample tape having a width of 20 mm was stuck on the back surface (09 × 3 mm thick) from the side of the pressure-sensitive adhesive layer on which the masking member was not laminated, in a cross-shape, except for the four corners, leaving a space of 30 mm. On the decorative board to which the test sample tape was attached, the release paper was peeled off to expose the adhesive layer on the side on which the masking member was laminated, and the plasterboard wall (1 mx 2 m) erected vertically. It is assumed that the position can be adjusted when the finger is inserted into the lower edge of the veneer, and the veneer can be moved upward.The adhesive layer adheres to the gypsum board wall, and the veneer cannot be moved upward. In this case, it was determined that position adjustment was impossible.

The results are shown in Tables 1 to 3 below. Table 1
In the ceiling adhesion test in ~ 3, the mark ○ indicates that there was no peeling off, the mark × indicates that there was peeling off, and in the position adjustment test results, the mark ○ indicates that the position can be adjusted.
A cross indicates that the position cannot be adjusted.

[0052]

[Table 1]

[0053]

[Table 2]

[0054]

[Table 3]

[0055]

[Table 4]

[0056]

According to the double-sided pressure-sensitive adhesive tape for temporary fixing of a decorative board according to the present invention, a flexible foam having a 25% compressive stress of 0.3 to 5 N / cm ² and a thickness of 0.5 to 3 mm is used. A pressure-sensitive adhesive layer is formed on both sides of the support having a ball tack value of 32 or more, and covers at least 6 to 40% of the surface of one of the pressure-sensitive adhesive layers, and has a thickness of 10% of the support. Since a non-adhesive or slightly-adhesive masking member of about 100% is laminated, prior to pressing,
Only the masking member comes into contact with the other member. Therefore, prior to pressing, the position of the decorative plate can be easily shifted with respect to the base material. That is, the position of the decorative board can be easily and reliably adjusted before the pressing.

Further, when the decorative plate is pressed toward the base material side, the masking member moves inside the surface of the pressure-sensitive adhesive layer, and the surface of the pressure-sensitive adhesive layer comes into close contact with the other side. Is temporarily fixed securely.

Therefore, the decorative board can be temporarily and efficiently fixed to the base material more efficiently and reliably than in the conventional construction method using a double-sided adhesive tape. In particular, with the conventional construction method using double-sided adhesive tape, it is easy to bend when the decorative board is thin, and it is no longer possible to adjust the position when the double-sided adhesive tape on the curved part comes in contact with the base, so multiple workers are required. On the other hand, in the present invention, the support made of the above-mentioned foam having moderate flexibility is used, and the masking member is further laminated, so that the decorative plate may be curved. Even, it is possible to reliably prevent the contact between the pressure-sensitive adhesive layer and the counterpart member before the temporary fixing,
Therefore, the position adjustment can be reliably performed even in the case of a single operation.

In the method for bonding a decorative board according to the present invention, the position of the decorative board with respect to the base material is adjusted using the double-sided adhesive tape for temporary fixing of the decorative board according to the present invention, and then the decorative board is pressure-bonded to the base material side. Just by doing so, it is possible to securely temporarily fix the decorative board to the base material. Moreover, since the adhesive is applied to the area other than the area where the double-sided adhesive tape is stuck,
After the temporary fixing, the decorative board can be securely and firmly adhered to the base material at a correct position by curing the adhesive.

In the double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative sheet and the method for bonding a decorative sheet according to the present invention, the position can be easily adjusted using a non-sticky or slightly sticky masking member as described above. The work of temporarily fixing the board and the work of bonding the decorative board can be performed easily with a small number of people, and the workability of the decorative board can be enhanced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view for explaining a structural example of a double-sided pressure-sensitive adhesive tape for temporarily fixing a decorative plate according to the present invention.

FIG. 2 is a cross-sectional view of the double-sided pressure-sensitive adhesive tape for temporary fixing of a decorative plate shown in FIG. 1, showing a state in which a masking member has sunk inward from the surface of the pressure-sensitive adhesive layer by pressing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Double-sided adhesive tape for temporary fixing of decorative board 2 ... Support 3, 4 ... Adhesive layer 3a ... Surface of adhesive layer 5 ... Non-adhesive or slightly adhesive masking member

Claims (2)

[Claims] The compression stress at the time of 25% compression is 0.3 to 5N.
/ Cm ² , a foam having a thickness of 0.5 to 3 mm is used as a support, and a pressure-sensitive adhesive layer having a thickness of 9 to 20% of the thickness of the support is laminated on both sides of the support. Z1
A non-adhesive or light-adhesive masking member having a thickness of 10 to 100% of the thickness of the support so that the coverage is at least 6 to 40% on at least one surface of the double-sided pressure-sensitive adhesive tape having a ball tack of 528 not less than 32. A double-sided pressure-sensitive adhesive tape for temporary fixing of a decorative board, characterized by having laminated thereon. 2. A step of applying the double-sided pressure-sensitive adhesive tape for temporary fixing of a decorative plate according to claim 1 to the back surface of a decorative plate; and the double-sided adhesive tape for temporary fixing of a decorative plate on the back surface of the decorative plate. A step of applying an adhesive to an area other than the portion; a step of adjusting the position of the decorative board by overlapping the decorative board with a base material so that the masking member comes into contact; and applying the decorative board to the base material side. Pressing and temporarily fixing the adhesive layer of the double-sided adhesive tape for temporary fixing of the decorative board to the base material,
And thereafter curing the adhesive.