JPH06108605A - Decorasive sheet for tile - Google Patents

Abstract

PURPOSE: To surely prevent the infiltration of moisture by sticking a decorative sheet having a water-resistant resin film layer and a water-resistant adhesive layer in a metallic foil tank on a tile face comprising a joint and being made of pottery. CONSTITUTION: A water-resistant resin film 14 comprising polyvinyl chloride extending over approximately the whole surface is fixed onto one surface of a metallic foil 12 composed of aluminum having thickness of 10 μm-100 μm. A water-resistant adhesive layer 16 made up of a rubber adhesive is attached extendingly over approximately the whole surface of the other surface of the metallic foil 12, and the decorative sheet 10 for the tile is formed. Accordingly, when the decorative sheet 10 is stuck on a tile surface, excellent follow-up adhesive properties to the stepped section of the tile can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative sheet used as a decorative surface finishing material for furniture surfaces, wall surfaces and the like, and particularly for protecting and decorating tile surfaces laid on walls of kitchens, bathrooms and toilets. The present invention relates to a tile decorative sheet having a multi-layered structure.

[0002]

2. Description of the Related Art Ceramic tiles, which are laid as finishing materials for walls of kitchens and bathrooms, themselves contribute to the protection of wall surfaces and the improvement of appearance, but during long-term use, It may cause damage such as cracks or stains such as mold on the joints and spoil the appearance. Conventionally, various post-treatment materials such as breakage repair agents and joint stain removers are commercially available.However, it is considered that the tile surface should be covered with other materials for protection due to the protection and decorative characteristics of the tile itself. It has not been.

On the other hand, as a decorative surface finishing material for furniture such as a table and interior walls, a decorative sheet made of polyvinyl chloride which has been previously colored and patterned as desired is known. A conventional polyvinyl chloride decorative sheet is attached to a generally flat adherend through an adhesive layer applied to one side of the sheet, and has the effect of protecting and decorating the adherend. Is. Since this type of polyvinyl chloride decorative sheet is excellent in decorativeness and workability, it can be considered to be used as a covering material for the tile surface.

[0004]

However, when the conventional polyvinyl chloride decorative sheet is used as a covering material for tile surfaces of bathrooms, toilets, etc., the following various problems occur. First, tile joints are usually 2
A narrow groove having a width of 5 mm and a depth of 1-5 mm,
In addition, since it generally exhibits poor tackiness, the conventional polyvinyl chloride decorative sheet has a problem that the sheet at the joint portion floats up over time due to the elastic restoring force of the polyvinyl chloride layer after the attachment. Since such floating of the joint portion impairs the appearance remarkably, the decorative sheet for tile is
It is necessary to secure excellent follow-up adhesiveness to steep steps and stenoses caused by dents in joints. Further, when the tile surface is covered with a conventional covering material such as a decorative sheet, the appearance having a unique shadow formed by the tile and the joint is hidden, and there is a fear that the decorative property unique to the tile may be impaired.
At this time, if the covering material has sufficient adhesiveness to follow the step due to the joint, it is possible to reproduce a unique shadow on the surface of the covering material attached to the tile surface. You can't do that with sheets.

Considering the usage conditions, it is inevitable that excellent water-resistant adhesiveness over the entire adhesive interface is required. However, in the conventional polyvinyl chloride decorative sheet, water easily penetrates into the adhesive interface. , I cannot meet this requirement. In particular, when a non-water resistant adhesive is used, the adhesive layer is easily peeled off from the tile surface due to the penetration of water. Furthermore, since the conventional polyvinyl chloride decorative sheet does not have the rigidity, that is, the “brush” of the cloth, which can maintain its own shape, when it is attached to the surface to be adhered, the bending of the sheet is extended while extending the bending due to gravity. It is necessary to attach the whole gradually from a part, which requires a relatively large amount of working time.

The present invention has been devised and devised to solve each of the above problems in the prior art.
Its purpose is to provide excellent follow-up adhesion to narrow and steep steps formed by tiles and joints, and excellent water-resistant adhesion over the entire adhesive interface, and to improve the designability of tiles and joints. It is an object of the present invention to provide a decorative sheet for tiles, which can protect and decorate a tile surface to be adhered without damaging it and can be easily attached to a tile surface having a large area.

[0007]

In order to achieve the above-mentioned object, the present invention is a decorative sheet for tile which is attached to a ceramic tile surface including joints, and which has a desired malleability. A water-resistant resin film layer adhered to almost one surface of the metal foil layer, and a water-resistant adhesive layer spread to almost the entire surface of the other surface of the metal foil layer. A tile decorative sheet comprising:

[0008]

[Function] The above decorative sheet is provided with a waterproof adhesive layer,
First, it is attached to the tile surface so that it adheres only to the surface of the tile. At this time, since the metal foil layer as the intermediate layer imparts rigidity to at least maintain the self-shape over the entire sheet, even a large-sized decorative sheet does not cause bending due to gravity and has a predetermined area of a large tile surface. Can be easily attached to the position. Then, by tracing the part of the decorative sheet attached to the tile surface that is not adhered to the joints while following the recesses of the joints from the sheet surface, the decorative sheet is appropriately stretched and attached to the stepped portion due to the joints. . At this time, the metal foil layer of the intermediate layer is plastically deformed due to its malleability, and the outermost waterproof resin film layer is fixed to the metal foil layer over substantially the entire surface, so it is spread together with the metal foil layer. It is stretched and elastically deformed. Therefore, the elastic restoring force of the stretched water-resistant resin film layer is suppressed by the plastically deformed metal foil layer, so that the elastic restoring action of the decorative sheet is eliminated, and the decorative sheet is formed in the step portion of the joint of the tile surface. It will follow accurately. Further, the adhesive interface of the decorative sheet to the tile surface can maintain excellent water-resistant adhesiveness by the action of the water-resistant adhesive layer. In particular,
Even on the surface of the tack-free joint, excellent water-resistant adhesiveness is maintained in synergy with the follow-up adhesiveness due to the action of the metal foil layer.
The decorative sheet attached to the tile surface in this way can reliably prevent the infiltration of water into the adhesive interface, and can maintain the initial attachment state for a long period of time.
It is possible to reveal a unique design that reproduces the dent of the joint on the seat surface.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail with reference to the preferred embodiments shown in the accompanying drawings. FIG. 1 is a sectional view showing a tile decorative sheet 10 according to a first embodiment of the present invention. The tile decorative sheet 10 includes a metal foil 12 having a desired malleability, a water-resistant resin film 14 adhered to substantially one surface of the metal foil 12, and the other surface of the metal foil 12. And a water resistant adhesive layer 16 that is spread over substantially the entire surface.

The metal foil 12 is made of aluminum, but may be made of another metal material capable of exhibiting a desired malleability, such as iron, copper, or lead. However, it is preferable to use an aluminum foil because it is easily available, easily adhered, and has excellent corrosion resistance. Water resistant resin film 1
Although 4 is made of polyvinyl chloride, it may be made of another resin material having water resistance and extensibility, such as polypropylene, acrylic, and urethane. In a preferred embodiment, the water resistant resin film 14 made of polyvinyl chloride is
Neox and DI-NOC (both trade names: manufactured by Sumitomo 3M Limited) having excellent elastic extensibility are used. The water-resistant adhesive layer 16 is made of a rubber-based adhesive having excellent water resistance, but instead of this, a water-resistant acrylic adhesive or silicone adhesive that does not use a hydrophilic monomer such as acrylic acid or acrylamide. Can also be used.

The metal foil 12 and the waterproof resin film 14 are fixed to each other by an adhesive (not shown) which can obtain a sufficient adhesive strength between aluminum and polyvinyl chloride. Further, in order to impart an incidental commercial value, a fungicide or a fungicide can be added to at least one of the metal foil 12 and the water resistant resin film 14. Further, in the water resistant adhesive layer 16, a silicone release paper 18 is attached in advance on the adhesive surface to the tile surface.

The properties of the decorative tile sheet 10 are affected by the thickness of the metal foil 12. If the thickness of the metal foil 12 is too thin, the metal foil 12 may be cut when the tile decorative sheet 10 is made to follow the step difference due to the joints on the tile surface, and eventually the decorative sheet 10 may be torn. Even if the metal foil 12 is expanded without being cut, the elastic restoring force of the waterproof resin film 14 cannot be suppressed, and as a result, the follow-up adhesiveness of the decorative sheet 10 is deteriorated. Further, if the thickness of the metal foil 12 is too thick, the workability of carrying, cutting, and adhering the decorative sheet 10 is deteriorated. Therefore, the thickness of the metal foil 12 should be selected in the range of 10 μm to 100 μm at most, and 40 μm to 80 μm in consideration of manufacturing conditions and cost.
Is more preferable.

It is desirable that the above-mentioned type of adhesive used in the water-resistant adhesive layer 16 has not only excellent water-resistant adhesive property but also appropriate initial tackiness. The appropriate initial tackiness of the water resistant adhesive layer 16 allows the tile decorative sheet 10 to be freely attached to and detached from the tile surface at the time of attachment, and as a result, the tile decorative sheet 10 can be accurately positioned.

In order to impart such characteristics to the water resistant adhesive layer 16, it is desirable that the adhesive is partially crosslinked. In the case of rubber adhesive, sulfur, resol type phenolic resin, crosslinking by peroxide, etc., in the case of acrylic adhesive, isocyanate, crosslinking by organometallic compound, etc., and in the case of silicone adhesive, platinum, Crosslinking with dibutyltin laurate or the like is effective for improving water resistance. Further, styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-
Block polymers such as styrene block copolymers are
Since the rubber component itself is physically cross-linked and exhibits appropriate initial tackiness and excellent water-resistant adhesiveness without adding a cross-linking agent, it is suitable as a material for the water-resistant adhesive layer 16.

A coupling agent, especially a silane coupling agent, may be added to each of the above-mentioned adhesives having a suitable initial tackiness and excellent water-resistant adhesiveness for the purpose of further improving water resistance. Since such a coupling agent forms a siloxane bond at the adhesive interface, a strong water-resistant adhesive force can be obtained with a small amount of addition.

In the present invention, the above-mentioned initial tackiness of the water resistant adhesive layer 16 is preferably 1.0 kg / 25 mm or more. Further, the above-mentioned water-resistant adhesive property is defined as having excellent water-resistant adhesive property when an adhesive force of 2.0 kg / 25 mm or more is obtained after a lapse of time in a water resistance test described later. Further, the thickness of the water resistant adhesive layer 16 is determined in consideration of the adhesive strength of itself, and the like.
It is preferably μm. If the thickness is less than 20 μm, there is a risk that the adhesive strength, particularly initial tackiness, may be insufficient, and if the thickness is greater than 80 μm, the decorative sheet 10
There is a danger that the overall thickness will increase and it will be difficult to handle.

A decorative sheet 10 for tiles having the above structure
Is attached to the tile surface as shown in FIG.
The excellent follow-up adhesiveness to the step portion 24 formed by the joint 22 and the excellent water-resistant adhesiveness over the entire adhesive interface 26 is realized, and the unique design that reproduces the depression of the joint 22 on the sheet surface is realized. It will be revealed for a long time. The effect of the tile decorative sheet 10 will be further clarified by the following description of the comparative test.

The tile decorative sheet 10 according to the first embodiment (embodiment 1) is formed as follows. First, a silicone adhesive paper 18 is coated with a rubber adhesive (Liquidine GR-732: manufactured by Liquidyne Corp.) as the water resistant adhesive layer 16, and is placed at a temperature of 80 ° C. for 2 minutes to be dried. The thickness of the water resistant adhesive layer 16 after drying is about 60 μm. Then, the water-resistant adhesive layer 16 is coated with 8 as the metal foil 12.
Soft aluminum foil (manufactured by Toyo Aluminum Co., Ltd.) having a thickness of 0 μm is laminated and arranged, and adhered over substantially the entire surface. Finally, about 200 water-resistant resin film 14 is formed on the metal foil 12.
The above-mentioned Neox having a thickness of μm is laminated and arranged, and is fixed over substantially the entire surface.

In addition, as a second embodiment (Example 2) of the present invention, a decorative sheet 10 'for tiles provided with a metal foil 12' made of a copper foil (made by Fukuda Metal Foil Industry Co., Ltd.) having a thickness of 40 μm ( 1) is tested. The other structure of the tile decorative sheet 10 ′ is substantially the same as that of the tile decorative sheet 10 of the first embodiment.

On the other hand, in the decorative sheet according to Comparative Example 1 for carrying out the comparative test, the water-resistant resin film 14 of the decorative sheet 10 according to Example 1 was inferior in elasticity to Polyox, compared with Neox. It is formed by substituting Scotchcal (trade name: manufactured by Sumitomo 3M Limited) which is a vinyl chloride sheet. The other material configurations and dimensions are the same as those of the decorative sheet 10 according to the first embodiment. The decorative sheet according to Comparative Example 2 is obtained by changing the thickness of the aluminum metal foil 12 of the decorative sheet 10 according to Example 1 to 7 μm. Other material configurations and dimensional specifications are the same as those in Example 1. It is the same as the decorative sheet 10. Furthermore, the decorative sheet according to Comparative Example 3 is formed by replacing the water resistant adhesive layer 16 of the decorative sheet 10 according to Example 1 with an acrylic adhesive having no water resistance. This acrylic adhesive contains 100% acrylic acid.
It is formed by adding 2 parts by weight of isocyanate as a crosslinking agent to 1 part by weight of the main agent. The other material configurations and dimensions are the same as those of the decorative sheet 10 according to the first embodiment.

The following four performance tests were carried out on the above five types of decorative sheets, and the results were compared and examined. [Test 1] Elongation (%) Each decorative sheet according to the example and the comparative example was 150 mm x 2
A sample piece is formed by cutting it into 5 mm, and this sample piece is subjected to 1 at room temperature (21 ° C, humidity 65%) using a tensile tester.
50 mm / min. With a gripping interval of 00 mm. Extend at the speed of. The elongation length until breakage of the sample piece at this time is shown as a percentage with respect to the initial length before expansion. [Test 2] Return Rate (%) The above sample pieces of each decorative sheet according to Examples and Comparative Examples were
Extend about 6 mm under the same conditions as Test 1. Then
After undergoing a predetermined cycle test for a long time in various environments of -30 ° C to 80 ° C, the length of each sample piece is measured and calculated by the following formula. Return rate (%) = (sample length (mm) -150) / 6 x 1
00 [Test 3] Water-resistant adhesive strength (kg / 25 mm) The above-mentioned sample pieces of each decorative sheet according to Examples and Comparative Examples were attached to a semi-porcelain tile (manufactured by Inax Co., Ltd.) in an initial state and at 40 ° C. 300 mm / m using a tensile tester after being immersed in constant temperature water for 168 hours
in. The peeling force at the time of peeling is measured by pulling at 180 ° in the direction of 180 °. [Test 4] Finished appearance Each of the decorative sheets according to Examples and Comparative Examples was attached to the tile surface shown in FIG. 2, and the appearance immediately after the attachment and the appearance after passing a predetermined cycle test in Test 2 were visually observed. Observe and evaluate by.

The test results are shown in Table 1 below.

[Table 1]

As shown in the test results in Table 1, the tile decorative sheet according to the present invention has an elongation of about 15% or more according to the above Test 1 and a return rate of about 70% according to the Test 2.
The following values are exhibited, and by having the characteristics in this range, excellent follow-up adhesiveness to the step portion of the joint of the tile surface is realized both in the initial stage and after curing. Therefore, as is clear from Table 1,
Tile decorative sheet 10, 1 according to each embodiment of the present invention
0'has both excellent follow-up adhesiveness to the stepped portion 24 of the tile surface as shown in FIG. 2 and excellent water-resistant adhesiveness over the entire adhesive interface 26, whereby moisture on the adhesive interface can be prevented. It is possible to reliably prevent infiltration and maintain the initial attachment state for a long period of time. As a result, the tile decorative sheets 10 and 10 ′ attached to the tile surface can show a unique design property in which the depression of the joint 22 is reproduced on the sheet surface as shown in FIG. 2.

[0024]

As is clear from the above description, according to the present invention, excellent follow-up adhesiveness to the step portion formed by the tile and the joint and excellent water-resistant adhesiveness over the entire adhesive interface are provided. Provided is a decorative sheet for tile, which can protect and decorate the surface of the adhered tile without impairing the designability formed by the tile and the joint.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a tile decorative sheet according to an embodiment of the present invention.

FIG. 2 is a diagram showing the tile decorative sheet of FIG. 1 in a state of being attached to a tile surface, (a) a plan view and (b) a cross-sectional view taken along line II-II.

[Explanation of symbols]

 10, 10 '... Decorative sheet for tile 12, 12' ... Metal foil 14 ... Water resistant resin film 16 ... Water resistant adhesive layer 18 ... Silicon release paper 20 ... Tile 22 ... Joint 24 ... Step 26 ... Adhesive interface

Claims (3)

[Claims] 1. A tile decorative sheet to be attached to a ceramic tile surface including joints, which comprises a metal foil layer having desired malleability, and a metal foil layer covering substantially the entire surface of one side of the metal foil layer. A decorative sheet for tiles, comprising: a water-resistant resin film layer adhered and fixed on the other side of the metal foil layer; and a water-resistant adhesive layer spread over substantially the entire other surface of the metal foil layer. 2. The tile decorative sheet according to claim 1, wherein the waterproof resin film layer is made of polyvinyl chloride having excellent elastic spreadability, and the metal foil layer is made of aluminum. 3. The metal foil layer has a thickness of 10 μm to 100 μm.
The decorative sheet for tile according to claim 1 or 2, which has a thickness of μm.