JP6836698B2 - Veneer - Google Patents

Description

The present invention relates to a highly safe decorative board that can be used as an interior / exterior material of various buildings.

Glass decorative boards are known as decorative boards used for inner walls of buildings and storage furniture (see, for example, Patent Documents 1 to 3). The glass decorative plate has a design layer formed by applying a paint containing a pigment or the like to one surface of the glass plate, and since the glass plate and the design layer are in close contact with each other, the design layer is viewed through the glass. By doing so, you can create a sense of luxury. For example, in a building or a store, a high-class inner wall can be realized by attaching the design layer side of the glass decorative board to a base material such as concrete.
In Patent Document 3, in a decorative glass composed of a plate glass and a design layer, a foamed polyurethane layer having good adhesion to the design layer is adhered and formed in order to prevent breakage or cracks due to impact or dropping. Safety decorative glass has been proposed.

Japanese Patent Application Laid-Open No. 2014-76625 Japan Registered Utility Model No. 2560753 Japan Real Kaihei 3-77630 Gazette

However, in a decorative board using foamed polyurethane as in Patent Document 3, since the foamed polyurethane layer is easily deformed when a large impact is applied, the plate glass is easily broken and fragments may be scattered when broken. In addition, polyurethane foam is easily deformed because moisture easily penetrates into it.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a decorative board which is hard to break even when a large impact is applied, does not scatter even if it breaks, and is hard to be deformed.

The decorative board of the present invention has a brittle plate-like body having a design property and a resin layer laminated on the plate-like body, and the resin layer is a closed cell body and the thickness of the resin layer. Is 1.5 mm or more, and the shore A hardness of the resin layer is 10 or more and 60 or less.

According to the present invention, it is possible to provide a decorative board that is hard to break even when a large impact is applied, does not scatter even if it breaks, and is hard to be deformed.

It is a schematic cross-sectional view of embodiment of the decorative board which concerns on this invention. It is a schematic cross-sectional view of the decorative board with a reinforcing material of one Example of this invention. It is a schematic diagram of the glass decorative board which carried out the self-weight test which concerns on this invention. It is a schematic perspective view of the test body which carried out the durability test which concerns on this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments and does not deviate from the scope of the present invention. Can be modified and substituted in various ways.

The decorative board of the embodiment according to the present invention has a brittle plate-like body having a design property and a resin layer laminated on the plate-like body. The design of the plate-like body may be expressed by the plate-like body itself having a pattern, color, etc., and the design property is imparted by the design layer interposed between the plate-like body and the resin layer. May be done. This design layer may or may not be integrated with the plate-shaped body. Further, the design layer interposed between the plate-shaped body and the resin layer includes the form of the design layer directly formed on the surface of the plate-shaped body and the form of the design layer directly formed on the surface of the resin layer.

Further, the resin layer of the present embodiment is preferably laminated on 80% or more of the surface of the plate-like body. More preferably, the resin layer is laminated on 90% or more of the surface of the plate-like body. By laminating a resin layer on most of the plate-like body, it becomes a decorative plate that is hard to break even if a large impact is applied and does not scatter even if it breaks.

As the plate-like body, if it is a brittle material, the effect of the present invention can be enjoyed. For example, a glass plate, a resin plate and a ceramic plate can be mentioned. In the following, an example of a glass decorative plate using a glass plate will be described.

FIG. 1 is a schematic cross-sectional view showing the present embodiment. The decorative plate 1 in the present embodiment has a glass plate 2, a resin layer 3 laminated on the glass plate 2, and a design layer 4 interposed between the glass plate 2 and the resin layer 3.

The decorative board 1 of the present embodiment can be applied to various uses such as building materials such as walls and ceilings and storage furniture. By laminating the glass plate 2 with the resin layer 3, the glass plate 2 is reinforced to make it difficult to break, and even if the glass plate 2 breaks, the glass plate 2 and the resin layer 3 are adhered to each other so that the glass pieces do not scatter. , Has high safety not found in conventional glass veneers. On the other hand, since the design layer 4 is brought into close contact with the glass plate 2 as in the conventional glass decorative plate, it is possible to produce a high-class aesthetic appearance.

The type of glass of the glass plate 2 is not particularly limited, and examples thereof include soda lime glass, non-alkali glass, and aluminosilicate glass. When chemically strengthening the glass, aluminosilicate glass containing 3% or more _{of Al 2} O ₃ in mass% based on the oxide is preferable. The plate thickness of the glass plate 2 is preferably 0.5 mm or more. When the plate thickness of the glass plate 2 is 0.5 mm or more, sufficient strength can be obtained by laminating with the resin layer. 1.0 mm or more is more preferable, and 1.5 mm or more is further preferable. Further, when the plate thickness is 8.0 mm or less, it is preferable because it is equivalent to the plate thickness of the conventional glass decorative plate, and the construction on the wall surface does not require any special work as in the conventional case. Further, it is more preferably 6.0 mm or less.

By the way, the glass plate has a large specific gravity, and the glass decorative plate to be applied to the wall surface has a large area, so that the weight is very heavy. Therefore, it was not easy to install the glass veneer on the wall surface because it was necessary for several workers to install it. In the present embodiment, since the strength can be ensured by laminating with the resin layer 3, the glass plate can be thinned. That is, since the weight is lighter than that of the conventional glass decorative plate, the thickness of the glass plate is preferably 5.0 mm or less. Further, 4.0 mm or less is more preferable, and 3.0 mm or less is particularly preferable. It may be 2.5 mm or less.

On the other hand, in order to secure the strength, the thickness of the glass plate is preferably 0.5 mm or more. Since the glass decorative plate can be thinned in this way, the area of the glass decorative plate of the present embodiment is not particularly limited, but ^{when it is 1 m 2} or more, the weight can be reduced as compared with the conventional glass decorative plate. Therefore, it is effective. Furthermore, it is effective when it is 2 m ^{2 or more.} In addition, because the glass veneer can be made lighter, it was conventionally firmly attached to the base material with an adhesive to prevent it from falling off, but it is also possible to prepare fasteners for the base material and perform construction by fitting without using an adhesive. It will be possible.

The glass plate 2 is preferably in close contact with the design layer 4. When the design layer 4 is viewed through the glass plate by being in close contact with the glass decorative plate, the sense of depth and luxury are increased and the appearance is excellent. Further, the visible light transmittance (obtained in accordance with JIS R3106) based on the standard A light source of the glass plate 2 is aesthetically preferable to be 60% or more, and more preferably 70% or more.

The surface of the glass plate 2 may be textured by post-processing such as frosting in order to provide a texture on the surface of the glass plate 2.
The glass plate 2 can be manufactured by a known method. That is, it is produced by cutting glass formed into a ribbon shape by a float method, a fusion method, a down draw method, a rollout method, or the like.

The glass plate 2 may have a compressive stress layer on the surface layer. When the glass plate 2 is subjected to the tempering treatment, the glass plate 2 becomes a tempered glass plate. The tempered glass plate that has been subjected to the tempering treatment is preferable because it is less likely to crack than the case where the tempering treatment is not applied. The tempered glass plate includes a compressive stress layer on the surface layer, that is, a front surface layer and a back surface layer having a residual compressive stress, and an intermediate layer formed between the front surface layer and the back surface layer and having a residual tensile stress. The residual compressive stress decreases from both ends in the thickness direction of the tempered glass plate toward the inside, and a residual tensile stress is generated inside the tempered glass plate.

The end face of the tempered glass plate may be continuously covered with the residual compressive stress on the front surface layer and the back surface layer. Since the end face of the tempered glass plate is covered with the residual compressive stress, it is less likely to crack due to impact, which is preferable. The end face of the tempered glass plate is not covered with the residual compressive stress, and the end face of the intermediate layer may be exposed on the end face of the tempered glass plate. In that case, it is preferable that the cover material is covered with a resin or the like.

The tempered glass plate is produced by subjecting a tempering treatment to generate residual compressive stress on the front surface and the back surface of the glass plate. The tempered glass plate may be either a chemically strengthened glass obtained by a chemically strengthened treatment such as an ion exchange method or a physically strengthened glass obtained by a physically strengthened treatment such as a wind-cooled strengthening method. With the chemical strengthening treatment, the value of the residual compressive stress of the front surface layer and the back surface layer can be increased even if the glass plate is thinner. For example, the value of the residual compressive stress of the surface layer is preferably 300 MPa or more, more preferably 400 MPa or more. In the case of chemically strengthened glass, the thickness of the compressive stress layer may be 50 μm or less, and may be 40 μm or less.

In the ion exchange method, the front surface and the back surface of the glass plate are ion-exchanged, and ions having a small ionic radius (for example, Li ion and Na ion) contained in the glass are replaced with ions having a large ionic radius (for example, K ion). As a result, residual compressive stress can be generated on the front surface and the back surface of the glass plate. In the ion exchange method, a glass plate is immersed in a high-temperature treatment liquid to perform ion exchange.

In the wind cooling strengthening method, a glass plate with a temperature near the softening point is rapidly cooled from both sides, and a temperature difference is created between the front and back surfaces of the glass plate and the inside of the glass plate to make the front and back surfaces of the glass plate. Residual compressive stress can be generated. Since the physical strengthening method such as the air cooling strengthening method takes several seconds to several tens of seconds for the strengthening treatment, the productivity is much superior to the chemical strengthening method by the ion exchange method or the like.

A design layer 4 is formed between the glass plate 2 and the resin layer 3. The design layer 4 can be formed, for example, by applying a paint containing a coloring pigment to the surface of the glass plate 2 and drying and curing it. Examples of the paint include acrylic resin-based paints. Acrylic resin-based paints have high adhesive strength and are also excellent in weather resistance and corrosion resistance. Moreover, it is preferable in that the finish is beautiful. The design layer 4 is not particularly limited as long as it can impart design properties, and may be, for example, a melamine resin-based paint or an epoxy resin-based paint, and the coloring pigment may be of various colors. Further, the design layer 4 may be a mirror on which metal is vapor-deposited.
The coating method is not particularly limited, and for example, a roll coating method, a spray coating method, a dip coating method, a flow coating method, a screen printing method, a spin coating method, or the like is used.

Further, as the design layer 4, the design layer 4 formed in a sheet shape may be attached to the glass plate 2 with an adhesive or the like. In that case, the design layer 4 formed into a sheet shape may have a single color or a plurality of colors, or may have a pattern such as a natural stone tone or a brick tone.

The resin layer 3 has a thickness of 1.5 mm or more. When the thickness of the resin layer 3 is 1.5 mm or more, sufficient strength can be obtained when laminated with the glass plate 2. Further, when the thickness of the resin layer 3 is 2.0 mm or more, the resin layer 3 has rigidity and is easy to handle at the time of construction. More preferably, it is 3.0 mm or more. Further, when the thickness of the resin layer 3 is 8 mm or less, it is the same as the thickness of the conventional glass decorative plate, and therefore, the construction on the wall surface does not require any special work as in the conventional case, which is preferable. Further, 6 mm or less is more preferable. Further, the shape of the resin layer 3 is preferably the same as that of the glass plate 2 in a plan view.

Further, the resin layer 3 can suppress the cracking of the glass plate 2 due to an impact or a fire, and can prevent the glass fragments from scattering in the unlikely event that the glass plate 2 is damaged.
Further, the resin layer 3 is a closed cell body. Since the resin layer 3 is a closed cell body, it is lightweight. Further, the resin layer 3 serves as a buffer layer and can absorb the unevenness of the wall surface at the time of construction on the wall surface.

The resin layer 3 may be a plate-shaped member, or may be integrally molded on the glass plate 2 by injection molding or extrusion molding. When the resin layer 3 is a plate-shaped member, an adhesive or an adhesive (hereinafter referred to as an adhesive) is used so that the glass plate 2 and the plate-shaped resin layer 3 are interposed between the glass plate 2 and the resin layer 3. , Including adhesive, it is called adhesive.) The adhesive may be applied to the entire surface of the resin layer 3 or may be a part of the adhesive. It is advantageous to apply the adhesive to the entire surface because the glass plate is less likely to break. Further, an adhesive may be applied to the design layer 4 of the glass plate 2. As the adhesive, a general building sealant can be used, and examples thereof include a modified silicone type sealant, an acrylic type adhesive, and a synthetic rubber type adhesive. The adhesive may be in the form of a sheet such as double-sided tape. Further, as the adhesive, it is suitable as a building material to select a material and a coating amount so as to have high nonflammability.

When the resin layer 3 is integrally molded with the glass plate 2, the glass plate 2 on which the design layer 4 is formed is placed in a molding mold, and the resin is injected onto the design layer 4 to be integrally molded. In the case of extrusion molding, the resin is supplied from the extrusion mold onto the design layer 4 of the glass plate 2 and cured to be integrally molded. If necessary, the resin layer 3 may be integrally molded after applying an adhesive, an undercoating agent (primer), for example, a silane coupling agent, or the like on the glass plate 2 side.

The total thickness of the glass plate 2 and the resin layer 3 is preferably 2.5 mm or more and 10 mm or less. When it is 2.5 mm or more, sufficient strength is obtained and the glass plate 2 is hard to break. In addition, the glass veneer often has a large area, and its rigidity improves workability. When the total thickness is 2.5 mm or more, sufficient rigidity is obtained and workability is good, preferably 3.0 mm or more, and more preferably 4.0 mm or more. Further, the total thickness is preferably 10 mm or less, more preferably 8.0 mm or less, which is equivalent to the thickness of the conventional glass decorative plate. It is preferable because it does not require any complicated work.

The shore A hardness of the resin layer 3 is 10 or more and 60 or less. The Shore A hardness referred to in the present invention is based on the measured value of a durometer (Asker rubber hardness tester A type manufactured by Asker Co., Ltd.). An indenter (pushing needle) is pushed into the surface of the object to be measured to deform it, and the amount of deformation (pushing depth) is measured and used as an average value at at least four locations. When the resin layer 3 is thin and soft, the resin layers are overlapped and measured so that the thickness is 6 to 12 mm. When the shore A hardness is 10 or more, the workability is good because it has sufficient rigidity, and the resin layer 3 is hard to be deformed, so that the glass plate 2 is hard to be deformed and hard to break. The shore A hardness is preferably 20 or more, more preferably 30 or more. Further, if the shore A hardness is 60 or less, the glass plate 2 has sufficient shock absorption, so that the glass plate 2 is not easily cracked even if it receives a strong shock. Shore A hardness is preferably 50 or less.

The resin layer 3 of the present embodiment is preferably an elastic body having a predetermined elasticity in order to absorb an impact when an object collides with the glass plate 2, for example. However, if the elasticity is too large, the glass plate 2 may be locally bent and damaged when it receives a strong impact. That is, the resin layer 3 needs to have a shore A hardness that can sufficiently absorb impact and does not increase the amount of deformation of the glass plate 2, and this can be achieved by the resin layer 3 having the shore A hardness.

The resin layer 3 is a closed cell body, and the shore A hardness of the resin layer 3 can be easily controlled. That is, by changing the foaming ratio, it becomes easy to control the shore A hardness, and it is easy to make the resin layer 3 the required shore A hardness according to the place where the decorative plate 1 of the present embodiment is used. It will be possible. Further, since the closed-cell resin layer has rubber elastic resilience as compared with the open-cell resin layer, the shore A hardness can be increased. Further, since the resin layer of the closed cell body is hard to permeate moisture, it is hard to be deteriorated and has a role of a water blocking layer of the material in contact with the resin layer 3.

The resin layer 3 may be a foamed polyethylene resin or a foamed rubber. Since these resins are hard to burn, they are preferable because they can easily be certified as non-combustible materials as building materials. Further, since it can be foamed, the shore A hardness as described above can be easily controlled, which is preferable in manufacturing.
If the resin layer 3 is a foamed polyethylene resin, it depends on heat resistance, durability against changes in temperature (hereinafter referred to as cold heat cycle resistance), moisture resistance, water resistance, chemical resistance such as hydrochloric acid and sodium hydroxide, and ultraviolet rays. Excellent light resistance that does not easily deteriorate.
On the other hand, when the resin layer 3 is a foamed polyurethane resin, the shore A hardness is less than 10 even if it is a closed cell, and the resin layer 3 is easily deformed, so that the glass plate 2 is easily deformed and easily broken.

The product T × H of the plate thickness T of the glass plate 2 and the shore A hardness H of the resin layer 3 is preferably 8 or more and 250 or less. The decorative plate of the glass plate 2 having a thin plate thickness T is preferably a resin layer 3 having a large shore A hardness H. When T × H is 8 or more, the glass plate 2 is hard to be deformed and hard to break. T × H is more preferably 13 or more, further preferably 17 or more, particularly preferably 20 or more, and most preferably 25 or more. Further, when T × H is 250 or less, the glass plate 2 is lightweight and is not easily broken even if the glass plate 2 receives a strong impact. T × H is more preferably 100 or less, and even more preferably 75 or less.

The glass plate 2 may have a functional layer that adds a special function to the decorative plate on the surface opposite to the resin layer 3. Examples of the functional layer include an antifouling film, an antibacterial film or an antifogging film.
The antifouling film has the effect of reducing the adhesion of fingerprints and making it difficult for stains to adhere. In particular, if the decorative plate 1 is touched directly by hand, fingerprints adhere to the glass plate 2 and impair the design. Therefore, it is preferable to have an AFP (Anti-Finger Print) function that reduces the adhesion of fingerprints. The AFP function attaches the AFP agent to the glass plate 2 to form an AFP film on the glass plate.
Examples of the AFP agent include fluorine-containing organosilicon compounds. The fluorine-containing organosilicon compound is not particularly limited as long as it imparts antifouling property, water repellency and oil repellency. The molecular weight of the AFP agent is preferably 3,000 to 10,000, more preferably 3,000 to 8,000, and even more preferably 3,000 to 6,000. When the molecular weight of the AFP agent is 3,000 or more, flexibility is imparted to the molecular structure, and scratch resistance and surface slipperiness can be obtained. Further, when it is 10,000 or less, a sufficient reactive group per molecule of the AFP agent can be secured, and the adhesion to the surface of the glass plate can be ensured.

The antibacterial film is formed by adhering an antibacterial agent exhibiting antibacterial properties to the glass plate 2. Examples of the antibacterial agent include natural antibacterial agents such as wasabi, metal-based antibacterial agents such as copper and silver, and oxide-based antibacterial agents such as titanium oxide. In particular, it is effective to diffuse silver ions from the surface of the glass plate to the inside by applying a silver-containing solution to the glass plate to form a silver film and heat-treating the glass plate on which the silver film is formed. Preferred in terms of sustainability.

The antifogging film is designed by providing a water-absorbent resin layer on the surface of the glass plate 2 and absorbing and removing minute water droplets formed on the surface of the glass plate 2 to prevent the surface of the glass plate 2 from becoming cloudy. Has the effect of maintaining. The antifogging film includes, for example, an underlying layer and a water absorbing layer. The base layer is a layer for making it difficult for the water absorption layer to be peeled off from the glass plate, and is obtained, for example, by applying a composition containing a silane coupling agent to the glass plate and reacting it. The water-absorbent layer is obtained by applying a composition containing a raw material component of a cured resin selected from a cured epoxy resin, a urethane resin and a crosslinked acrylic resin onto the base layer and reacting the layers.

The periphery of the glass plate 2 and the resin layer 3 may be covered with a reinforcing material. FIG. 2 is a schematic cross-sectional view in which the reinforcing material 5 is attached to the end surface of the decorative plate 1. The reinforcing material 5 is formed in a frame shape around the decorative plate 1. The reinforcing material 5 does not have to be seamlessly formed in a frame shape, and may be separated for each side. The reinforcing material 5 does not have to cover all sides of the decorative board 1, but may cover at least one side. The reinforcing material 5 is made of, for example, a vinyl chloride resin. Since the decorative plate 1 is covered with the reinforcing material 5, the end surface of the glass decorative plate is protected during construction, so that it is difficult to crack, which is preferable in terms of workability.

The reinforcing material 5 has an anchor 6, and the reinforcing material 5 may be fixed to the decorative plate 1 by inserting the anchor 6 into the resin layer 3. When the decorative plate 1 is rectangular, anchors 6 are provided at one or more locations on each side, preferably at a plurality of locations. As shown in FIG. 2, for example, the anchor 6 penetrates into the resin layer 3 of the decorative plate 1 and is engaged with the anchor 6. The reinforcing material 5 is fixed to the decorative plate 1 by engaging the anchor 6 with the resin layer 3. The reinforcing material 5 may be fixed to the end face of the decorative plate 1 with an adhesive. It is preferable to fix the reinforcing material 5 to the decorative plate 1 with the anchor 6 because the time for curing the adhesive can be eliminated. Further, the anchor 6 and the adhesive may be used in combination. In that case, the anchor 6 functions as a temporary fixing, and it is possible to prevent the reinforcing material 5 from being displaced before the adhesive is cured.

Although the example in which the glass plate is used as the plate-like body has been described above, a brittle resin plate or a ceramic plate may be used instead of the glass plate. Examples of the brittle resin plate include a melamine-based resin plate, an acrylic-based resin plate, a polycarbonate-based resin plate, a vinyl chloride-based resin plate, and the like. Examples of the ceramic plate include ceramic members such as tiles. The plate-like body may be made of stone. Similarly, these brittle plate-like bodies can also be suitably used for the decorative plate of the present invention.
Further, the design layer may be imparted with design by providing a pattern on the surface of the plate-like body with irregularities or the like, for example, the plate-like body itself is a template glass.

(Impact test)
In the examples and comparative examples shown in Table 1 below, soda lime glass (AS manufactured by Asahi Glass Co., Ltd.) having a length of 300 mm and a width of 300 mm was used as the glass plate. Further, as the resin layer, a foamed polyethylene resin plate adjusted to a desired shore A hardness by changing the foaming ratio of a chemically cross-linked polyethylene foamed resin (manufactured by Sanwa Kako Co., Ltd., trade name: SUNPELICA), which is a closed cell, was used. An adhesive (manufactured by Cemedine Co., Ltd., trade name: POS Seal Multi) was applied to the entire surface of the glass plate, and the resin layer was bonded. Various glass decorative plates were prepared by changing the plate thickness of the glass plate, the thickness of the resin layer, and the shore A rigidity as shown in Table 1.

A general-purpose silicone rubber plate (silicon rubber sheet manufactured by Misumi) that is not a closed cell for a resin layer with a shore A hardness of 65 to 70, and a general-purpose acrylic resin that is not a closed cell for a resin layer with a shore A hardness of 80 to 85. Plate (manufactured by Mitsubishi Rayon Co., Ltd., trade name: Acrylite E), Shore A Polyurethane foam resin plate (Achilles Board (registered trademark) manufactured by Achilles Co., Ltd.), which is a closed cell in the resin layer with hardness 0 to 3, Shore A For the resin layer having a hardness of 0, a foamed polyurethane resin plate (manufactured by Inoac Co., Ltd .: Color Foam (registered trademark)), which is an open cell rather than a closed cell, was used. As another comparative example, a glass plate without a resin layer was evaluated. For the impact test, the design layer was omitted to prepare a glass veneer.

In the impact test, in the bending and impact test method for building boards (JIS A1408), a gypsum board is installed on sand, and a steel ball weighing 225 g is applied to a glass veneer placed on the gypsum board. It was carried out by dropping from heights of 75 cm and 100 cm. The results are shown in Table 1.
In Table 1, when the probability that the glass decorative plate was not damaged when the steel ball was dropped from a height of 75 cm was 50% or more, it was rated as “Δ”, and when it was less than 50%, it was rated as “x”. Further, the case where the probability that the glass decorative plate was not damaged when the steel ball was dropped from a height of 100 cm was 80% or more was evaluated as “◯”. The probability of each example was calculated from the results of testing with a sample size of 2 to 5, and an evaluation of “◯”, “Δ” or “×” was carried out. In Table 1, the blank part indicates that there is no corresponding production sample.

From the results in Table 1, a decorative board in which the resin layer is a closed cell, the thickness of the resin layer is 1.5 mm or more, and the shore A hardness is 10 or more and 60 or less is excellent in impact resistance. It is hard to break. In particular, when the thickness of the glass plate is 0.5 mm or more, the thickness of the resin layer is 1.5 mm or more, and the shore A hardness of the resin layer is 10 or more and 60 or less, the plate thickness is 4.0 mm. It was found that the strength was equal to or higher than that of the glass veneer with only the glass plate. Further, a decorative board having a shore A hardness of less than 10 in the resin layer, particularly a decorative board having a shore A hardness of 3 or less in the resin layer, has impact resistance even if the thickness of the resin layer is 1.5 mm or more. It turned out to be bad and fragile.

(Fever test)
As a glass plate, soda lime glass (AS manufactured by Asahi Glass Co., Ltd., length 300 mm, width 300 mm, plate thickness of 1.1 mm and 2.0 mm) and adhesive (manufactured by Cemedine Co., Ltd., trade name: POS seal multi) ) Is applied to the entire surface, and a chemically cross-linked polyethylene foam resin (manufactured by Sanwa Kako Co., Ltd., trade name: SUNPELICA) is applied as a resin layer, the thickness is 3 mm, and the shore A hardness is 30 to 32 and 25 to 27. type. ), And the conditions of the thickness of the glass plate and the shore A hardness of the resin layer were changed to prepare five glass decorative plates of four types. In the heat generation test, the glass veneer was fixed by applying an adhesive (Cemedine Co., Ltd., trade name: POS Seal Multi) to the base material (thickness 12.5 mm) of gypsum board, which is a non-combustible material. went.

An electric heater is installed facing the surface of the prepared glass decorative plate, ^{radiant heat of 50 kW / m 2} is applied to the glass decorative plate from the electric heater, and the ignition plug is installed near the glass decorative plate with sparking. A heat generation test was conducted to measure the calorific value of the glass veneer.
In the exothermic test, (1) the total calorific value should be 8 MJ / m ² or less, and (2) the maximum heat generation rate should not exceed ^{200 kW / m 2 continuously for 10 seconds or more within 20 minutes after the start of heating.} , And (3) no cracks or holes penetrating to the back surface, which is harmful for fire prevention. All the glass veneers of the above-described embodiment cleared the above three evaluation items. As a result, it was found that the glass veneer of this example is a highly nonflammable building material.

(Self-weight test)
In the examples and comparative examples shown in Table 2 below, various glass decorative plates were produced using the same glass plates, resin plates, and adhesives as in the impact test. The thickness of the glass plate used here is 3 mm, and a paint containing a coloring pigment is coated on one main surface of the glass plate.
FIG. 3 is a schematic view of a glass veneer subjected to a self-weight test.

First, as shown in FIG. 3A, a resin layer of double-sided tape 7 (manufactured by 3M, trade name: ATX1003) having a width of 25 mm so that A is 62.5 mm, B is 125 mm, and C is 62.5 mm. 3 was attached, and the glass veneer was attached to the gypsum board 8 as shown in FIGS. 3 (b) and 3 (c).
FIG. 3B is a schematic plan view of a glass decorative plate attached to a gypsum board, and FIG. 3C is a schematic side view. Hold the glass veneer attached to the gypsum board in an environment of temperature 80 ° C. and humidity 30% RH so that the main surface of the glass plate is in the vertical direction, and after 5, 10, and 15 days, the glass veneer The amount D of the vertical displacement of the glass plate 2 shown in the schematic side view of FIG. 3D immediately after holding was measured.

Further, another glass decorative plate attached to the gypsum board was similarly held in an environment of 60 ° C. and 95% humidity RH, and then the vertical displacement amount D of the glass plate 2 was measured immediately after the holding. Further, another glass veneer attached to the gypsum board was changed in temperature in the range of -10 ° C to 60 ° C twice a day in an environment of humidity 95% RH, and held in the same manner, and then the glass immediately after holding. The vertical displacement amount D of the plate 2 was measured. The above results are shown in Table 2.
In Table 2, the case where the displacement amount D in the vertical direction is less than 1 mm is “◯”, the case where it is 1 mm or more is “▲”, and the case where the glass decorative plate is peeled off from the gypsum board is “x”. The displacement amount D of each example was calculated from the results of the test with the number of samples of 2 to 5, and was evaluated as “◯”, “▲” or “×”.

From the results in Table 2, a decorative plate in which the resin layer is a closed cell, the thickness of the resin layer is 1.5 mm or more, and the shore A hardness is 10 or more and 60 or less is the displacement amount D of the glass plate. However, it was less than 1 mm in each case, and was excellent in heat resistance and moisture resistance. Further, in the decorative plate in which the resin layer is not a closed cell but an open cell and the shore A hardness is less than 10, the displacement amount D of the glass decorative plate is 1 mm or more in each case.

(Durability test)
In the examples and comparative examples shown in Table 3 below, soda lime glass (AS manufactured by Asahi Glass Co., Ltd.) having a length of 65 mm, a width of 25 mm, and a thickness of 5 mm was used as the glass plate, and a coloring pigment was applied to one main surface of the glass plate. The containing paint is painted. Further, the foaming ratio of the chemically cross-linked polyethylene foamed resin (manufactured by Sanwa Kako Co., Ltd., trade name: SUNPELICA), which is a closed cell as the resin layer, was adjusted to the desired Shore A hardness, and the length was 25 mm, the width was 25 mm, and the thickness was 3 mm. Foamed polyethylene resin plate was used.

FIG. 4 is a schematic perspective view of a test body subjected to a durability test.
As shown in FIG. 4, an acrylic resin-based double-sided tape (manufactured by 3M, trade name) so that the main surface of the two glass plates 2 coated with the paint has a cross shape via the resin layer 3. : A test body 9 bonded by ATX1003 was prepared.

The prepared test body 9 was placed in an environment described later for 10 days, then placed at a temperature of 23 ° C. for 24 hours, and the appearance was observed to measure the adhesive strength. The adhesive strength (unit: kgf / cm ² ) is the maximum stress when a load is applied to the two glass plates at a tensile speed of 5 mm / min in the direction in which the two glass plates are separated at a temperature of 23 ° C. The environment in which the test body 9 is placed for 10 days is the following five types (1) to (5).
(1) In order to examine the light resistance, Xe-WOM continued to irradiate light in the direction perpendicular to the glass plate under the conditions ^{of 150 W / m 2 and BPT 63 ° C.} Only in this environment, the adhesive strength was evaluated even in the test piece in which the glass plate was not coated with the paint containing the coloring pigment.
(2) In order to examine the humidity resistance, the temperature was set to 60 ° C. and the humidity was set to 95% RH.
(3) In order to examine the heat resistance, the temperature was set to 80 ° C. and the humidity was set to 30% RH.
(4) In order to check the water resistance, the test piece was immersed in water having a temperature of 60 ° C.
(5) In order to examine the cold heat cycle resistance, the temperature of the test piece was changed in the range of −10 ° C. to 60 ° C. twice a day in an environment with a humidity of 95% RH.

Table 3 shows the results of appearance observation and adhesive strength. In addition to the test results after being left in the above environment for 10 days, the result of measuring the adhesive strength without placing the test piece in these environments is shown as (6). In Table 3, when the adhesive strength is 2.0 kgf / cm ² or more, it is evaluated as “◯”, and when it is 1.0 kgf / cm ² or more and less than 2.0 kgf / cm ² , it is evaluated as “Δ”, and 1.0 kgf / cm ² The case where it was less than "x" was defined as "x", and the case where the glass plate and the resin layer were peeled off when placed in the environments (1) to (5) above was designated as "XX". In addition, when the paint applied to the glass plate was discolored, it was indicated as "discoloration". The adhesive strength of each example was calculated from the results of testing with a number of samples of 2 to 5, and evaluation of "○", "Δ", "×", or "XX" was carried out.

From the results in Table 3, a test piece in which the resin layer is a closed cell, the thickness of the resin layer is 1.5 mm or more, and the shore A hardness is 10 or more and 60 or less has an adhesive strength of the test piece. In each case, it was 2.0 kgf / cm ² or more, and was excellent in light resistance, moisture resistance, heat resistance, water resistance, and cold / heat cycle resistance. If it is a closed cell body, it is difficult for water to permeate into the resin layer and the resin layer is not easily deformed. In the open cell test piece, moisture easily permeates into the resin layer, so that the resin layer is easily deformed and the paint applied to the glass plate is easily discolored.

The decorative board of the present invention can be widely used as a decorative board for interior and exterior materials of various buildings such as buildings and stores, including for general houses, and is useful. Since it has excellent water resistance, it is particularly suitable as an interior material for toilets and kitchens.
The entire contents of the specification, claims, drawings, and abstract of Japanese Patent Application No. 2016-159115 filed on August 15, 2016 are cited here as disclosure of the specification of the present invention. , Incorporate.

1: Decorative board, 2: Glass plate, 3: Resin layer, 4: Design layer, 5: Reinforcing material, 6: Anchor, 7: Double-sided tape, 8: Gypsum board, 9: Specimen

Claims (16)

It has a brittle plate-like body having design properties and a resin layer laminated on the plate-like body, the resin layer is a closed cell body, and the thickness of the resin layer is 1.5 mm or more. Yes, the shore A hardness of the resin layer is 10 or more and 60 or less.
The resin layer is foamed polyethylene resin der Ru of粧板. It has a brittle plate-like body having design properties and a resin layer laminated on the plate-like body, the resin layer is a closed cell body, and the thickness of the resin layer is 1.5 mm or more. Yes, the shore A hardness of the resin layer is 10 or more and 60 or less.
The resin layer is foamed rubber der Ru of粧板. The decorative plate according to claim 1 or 2 , wherein the resin layer is laminated on 80% or more of the surface of the plate-like body. It has a brittle plate-like body having design properties and a resin layer laminated on the plate-like body, the resin layer is a closed cell body, and the thickness of the resin layer is 1.5 mm or more. Yes, the shore A hardness of the resin layer is 10 or more and 60 or less.
The plate-like body, a glass plate der Ru of粧板. The decorative plate according to claim 4 , wherein the glass plate has a plate thickness of 0.5 mm or more, and the total thickness of the glass plate and the resin layer combined is 2.5 mm or more and 10 mm or less. The decorative plate according to claim 5 , wherein the glass plate has a plate thickness of 4 mm or less. The decorative board according to claim 5 or 6 , wherein the total thickness is 8.0 mm or less. The decorative plate according to any one of claims 4 to 7 , wherein the glass plate is imparted with the design property by a design layer interposed between the glass plate and the resin layer. The decorative plate according to any one of claims 4 to 8 , wherein the glass plate is tempered glass having a compressive stress layer on the surface layer. The decorative plate according to any one of claims 4 to 9 , wherein the glass plate is chemically tempered glass. The decorative plate according to any one of claims 4 to 10 , wherein the product T × H of the plate thickness T of the glass plate and the shore A hardness H of the resin layer is 8 or more and 250 or less. The decorative plate according to any one of claims 1 to 11 , wherein the plate-like body has a functional layer on a surface opposite to the resin layer. The decorative board according to claim 12 , wherein the functional layer is an antifouling film. The decorative board according to claim 12 , wherein the functional layer is an antibacterial film. The decorative plate according to any one of claims 1 to 14 , wherein the plate-like body and the resin layer are surrounded by a reinforcing material. The decorative plate according to claim 15 , wherein the reinforcing material has an anchor, and the reinforcing material is fixed by inserting the anchor into the resin layer.

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