JP7037746B2 - Veneer - Google Patents

Description

The present invention relates to a decorative board.

A glass veneer is known as a veneer used for the inner wall of a building or storage furniture. For example, in Patent Document 1, 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 cracking due to impact or dropping. Safety decorative glass has been proposed.

Jitsukaihei 3-77630 Gazette

By the way, interior restrictions are imposed on decorative boards used in large-scale buildings and special buildings by the Building Standards Law. Regarding interior restrictions, the requirements are stipulated in Article 108-2 of the Building Standards Act Enforcement Ordinance. The heat generation test can determine the characteristics of the decorative board. The safety decorative glass of Patent Document 1 has not been studied for heat generation.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a decorative plate which surely satisfies the requirements of a heat generation test and is hard to burn.

The decorative plate according to the present invention has a brittle plate-like body having a design property and a foamable resin layer laminated on the plate-like body, and the plate-like body has a thickness of 0.5 mm or more. The resin layer has a thickness of 1 mm or more, and the resin layer contains a skeleton resin and a flame retardant.

According to the decorative plate of the present invention, the requirements for the heat generation test can be surely satisfied and the fire can be made hard to burn.

FIG. 1 is a schematic cross-sectional view of a decorative board. FIG. 2 is a schematic cross-sectional view of a decorative board with a reinforcing material.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The present invention will be described in the following embodiments. However, changes can be made by many methods without departing from the scope of the present invention, and other embodiments other than the present embodiment can be used. Therefore, all modifications within the scope of the present invention are included in the claims. Here, in the figure, the parts indicated by the same symbols are basically similar elements having the same functions.

(Veneer)
The decorative board of the present embodiment 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. 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 or 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 an embodiment. The decorative plate 1 in the embodiment has a glass plate 2, an effervescent 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. There is.

The decorative board 1 of the 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 and the resin layer 3, the glass plate 2 can be reinforced and hard to crack. Further, even if the glass plate 2 is broken, the glass plate 2 and the resin layer 3 are adhered to each other so that the glass pieces do not scatter, so that the decorative plate 1 of the embodiment has high safety. Since the design layer 4 is in close contact with the glass plate 2, it is possible to produce a high-class aesthetic appearance.

In the case of the decorative plate 1 in which the glass plate 2 and the resin layer 3 are laminated, heat generation using an ISO5660-1 compliant cone calorimeter for determining the requirements stipulated in Article 108-2 of the Building Standards Law Enforcement Ordinance In the sex test, when heated from the side of the glass plate 2, the peripheral edge of the glass plate 2 is covered with a metal frame for fixing the glass plate 2, and the peripheral edge of the glass plate 2 is hard to be heated. The distribution of the thermal stress generated in 2 causes cracks in the glass plate 2, and the gas generated from the resin layer 3 pushes up the glass plate 2 to develop cracks in the glass plate 2. Further, when the glass plate 2 is pushed up, an opening is formed in the glass plate 2 in the direction orthogonal to the crack centering on the crack. When an opening is formed in the glass plate 2, the resin layer 3 is exposed and the contact area between the resin layer 3 and air becomes large, so that the resin layer 3 is easily burned. If the glass plate 2 has an opening, the decorative plate 1 may not meet the requirements for the heat generation test. Even when an opening occurs, it is important to improve the stability of the decorative plate 1 against the heat generation test and make it hard to burn.

In the decorative plate 1 of the embodiment, by adding a flame retardant to the skeleton resin of the resin layer 3, it is possible to surely satisfy the requirements of the heat generation test and make it difficult to burn.

Hereinafter, the materials constituting the decorative board will be described.

<Plate-shaped body>
As the plate-like body, if it is a brittle material, the effect of the present invention can be enjoyed. Brittle means the property of being easily broken when subjected to force. For example, a glass plate, a resin plate or a ceramic plate can be mentioned. The resin plate is preferably a brittle resin plate. Hereinafter, a case where the plate-shaped body is a glass plate 2 will be described.

The type of glass of the glass plate 2 is not particularly limited. For example, soda lime glass, non-alkali glass, aluminosilicate glass and the like can be mentioned. When chemically strengthened, 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 3.

Further, the glass plate 2 can be made heavier by setting the thickness to 0.5 mm or more. By making the glass plate 2 heavier, it is possible to prevent the glass plate 2 from having an opening due to its own weight. As a result, since the resin layer 3 is hardly exposed, the decorative plate 1 can be made hard to generate heat and hard to burn. The glass plate 2 is preferably 1.1 mm or more, preferably 1.5 mm or more, and particularly preferably 2 mm or more.

The glass plate 2 is preferably 5 mm or less. The conventional glass veneer has a drawback that it is heavy and difficult to construct, but if it is 5 mm or less, it does not become excessively heavy and it is preferable because it is easy to construct. The glass plate is preferably 4 mm or less, and particularly preferably 3 mm or less.

The density of the glass plate 2 is preferably 2300 kg / m ³ or more and 2800 kg / m ³ or less. When the density of the glass plate 2 is 2300 kg / m ³ or more, the glass plate 2 can be less likely to have an opening due to its own weight. As a result, since the resin layer 3 is hardly exposed, the decorative plate 1 can be made hard to generate heat and hard to burn. The density of the glass plate 2 is more preferably 2400 kg / m ³ or more. Further, when the density of the glass plate 2 is 2800 kg / m ³ or less, the decorative plate 1 can be made lightweight. The density of the glass plate 2 is more preferably 2600 kg / m ³ or less.

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 2 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, a glass plate is manufactured by cutting glass formed into a ribbon shape by a float method, a fusion method, a downdraw 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 tempered, the glass plate 2 becomes a tempered glass plate. A tempered glass plate that has been subjected to the tempering treatment is preferable because opening is less likely to occur as compared with 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 surface layer and a back surface layer having residual compressive stress, and an intermediate layer formed between the surface layer and the back surface layer and having residual tensile stress. The residual compressive stress decreases from both ends in the thickness direction of the tempered glass plate toward the inside, and the 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 difficult to crack due to an impact, which is preferable. The end face of the tempered glass plate may not be 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 manufactured by performing 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 chemically strengthened glass obtained by a chemically strengthened treatment such as an ion exchange method or physically strengthened glass obtained by a physically strengthened treatment such as an air-cooled strengthening method. In the case of 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 with the thinner glass plate 2. 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, or 40 μm or less. Further, the thickness of the compressive stress layer may be 10 μm or more, or 20 μm or more.

In the ion exchange method, the front surface and the back surface of the glass plate 2 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, the glass plate having a temperature near the softening point is rapidly cooled from both sides, and a temperature difference is created between the front surface and the back surface of the glass plate 2 and the inside of the glass plate, so that the front surface and the back surface of the glass plate are created. Residual compressive stress can be generated in. Since the physical strengthening method such as the wind 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.

<Design layer>
A design layer 4 is formed between the glass plate 2 and the resin layer 3. The design layer 4 is formed by, for example, 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 designability, 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 coated with a metal film.

The method for applying the paint 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 and the like are used.

Further, instead of the paint, the design layer 4 molded into 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.

<Resin layer>
The resin layer 3 is composed of an effervescent resin layer containing a skeletal resin that defines bubbles (cells). When the effervescent resin layer 3 is produced by a chemical cross-linking method, a cross-linking agent is added to the skeleton resin to cause a cross-linking reaction by the cross-linking agent and a decomposition reaction of the foaming agent to retain gas components, thereby causing bubbles ( The cell) is defined, and the resin layer 3 having a predetermined foaming property can be obtained.

The type of skeletal resin and the manufacturing method are not limited as long as the predetermined foaming characteristics can be obtained. As the skeleton resin, synthetic resin, synthetic rubber and the like can be used, for example, polyethylene, ethylene-vinyl acetate copolymer (EVA: Ethylene-Vinyl Acetate), ethylene-propylene-diene rubber (EPDM), silicone, polyurethane and the like. Can be used.

The bubbles defined by the skeleton resin preferably have a closed cell structure. The closed cell structure means a structure in which bubbles are arranged independently. By adopting the closed cell structure, the physical strength of the resin layer 3 can be increased as compared with the open cell structure.

Since the skeletal resin of the resin layer 3 of the embodiment contains a flame retardant, even when the glass plate 2 is opened and the resin layer 3 is exposed when the heat generation test is performed on the decorative plate 1, the resin is made of the flame retardant. Ignition of layer 3 is suppressed. As a result, the total calorific value, which is a requirement required in the exothermic test, can be suppressed.

As the flame retardant, the organic flame retardant and the inorganic flame retardant can be added to the skeletal resin alone or mixed together. As the organic flame retardant, a bromine-based aromatic compound, for example, a phosphorus compound or the like can be used. Further, as the inorganic flame retardant, magnesium hydroxide, aluminum hydroxide and the like can be used. The mass ratio (flame retardant / skeletal resin) of the flame retardant contained in the resin layer 3 to the skeletal resin is preferably 20% or more, more preferably 27% or more, and further preferably 30% or more. It is preferably 50% or more, and most preferably 70% or more.

The resin layer 3 has a thickness of 1 mm or more. When the thickness of the resin layer 3 is 1 mm or more, sufficient impact resistance can be obtained when laminated with the glass plate 2. In addition, since it can absorb the unevenness of the wall surface, it can be easily handled during construction. The thickness of the resin layer 3 is preferably 2 mm or more, more preferably 3 mm or more.

Further, when the thickness of the resin layer 3 of the decorative plate 1 is 8 mm or less, it is equivalent to the plate thickness of the conventional glass decorative plate, so that the construction on the wall surface does not require any special work as in the conventional case. 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.

The density of the resin layer 3 is preferably 30 to 160 kg / m ³ . When the density of the resin layer 3 is 30 kg / m ³ or more, sufficient impact resistance can be obtained when laminated with the glass plate 2. The density of the resin layer 3 is more preferably 70 kg / m ³ or more. Further, when the density of the resin layer 3 is 160 kg / m ³ or less, the resin layer 3 is lightweight and the decorative plate 1 can be made lightweight. In addition, the calorific value of the resin layer 3 is reduced, and the decorative plate 1 is less likely to burn. The density of the resin layer 3 is more preferably 120 kg / m ³ or less, further preferably 100 kg / m ³ or less, and particularly preferably 80 kg / m ³ or less.

It is preferable that the resin layer 3 further contains a filler. By including the filler, the amount of the skeletal resin in the resin layer 3 can be reduced. As a result, the total calorific value, which is a requirement for the exothermic test, can be effectively suppressed.

An inorganic filler can be used as the filler, and for example, calcium carbonate or the like can be used as the inorganic filler. The mass ratio of the inorganic filler contained in the resin layer 3 to the skeleton resin is preferably 45% or more, more preferably 55% or more.

The resin layer 3 can contain other components. As other components, for example, pigments, inorganic additives and the like can be included. Various functions can be imparted to the resin layer 3. The presence or absence of a flame retardant or the like in the resin layer 3 can be measured by, for example, IR (infrared spectroscopy), TGA (thermogravimetric analysis), DSC (differential scanning calorimetry) or the like.

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, the glass plate 2 and the plate-shaped resin layer 3 are an adhesive or an adhesive (so that the design layer 4 is interposed between the glass plate 2 and the resin layer 3). Hereinafter, it is preferable that the adhesive is used as an adhesive, including the 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 2 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-based sealant, an acrylic-based adhesive, a synthetic rubber-based adhesive, and the like. 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.

In the decorative plate 1, the ratio (A / B) of the thickness A of the glass plate 2 to the thickness B of the resin layer 3 is preferably 50% or more. By making the glass plate 2 relatively thick with respect to the resin layer 3, it is possible to suppress the formation of openings in the glass plate 2. The exposure of the resin layer 3 is suppressed, and the total calorific value required for the heat generation test can be effectively suppressed. The ratio (A / B) of the thickness A of the glass plate 2 to the thickness B of the resin layer 3 is more preferably 60% or more, further preferably 66% or more.

In the decorative plate 1 of the embodiment, the surface density is preferably 10 kg / m ² or less. Since the decorative plate 1 has the resin layer 3, the surface density is small and the decorative plate 1 is lightweight even if the plate thickness is the same as that of the conventional glass decorative plate. When the surface density is 10 kg / m ² or less, the decorative plate 1 is sufficiently lightweight. The surface density means the mass of the decorative plate 1 per 1 m ² . The surface density is more preferably 8 kg / m ² or less, and further preferably 6 kg / m ² or less.

It is preferable that the total calorific value of the decorative plate 1 for 20 minutes in the heat generation test using a cone calorimeter compliant with ISO5660-1 is 6 MJ / m ² or less. In the case of non-combustible materials, it is generally required that the total calorific value for 20 minutes is 8 MJ / m ² or less. Since the decorative plate 1 including the resin layer 3 of the embodiment has a total calorific value of 6 MJ / m ² or less under the same conditions, combustion can be suppressed more effectively. Further, it is more preferable that the total calorific value for 20 minutes is 4 MJ / m ² or less. The decorative plate 1 can suppress combustion more effectively.

The glass plate 2 may have a functional layer for adding 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, when the decorative plate 1 is directly touched by hand, fingerprints adhere to the glass plate 2 and impair the design. Therefore, it is preferable to have an AFP (Anti-Fingerprint) function for reducing 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 2. 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 or more and 10,000 or less, more preferably 3,000 or more and 8,000 or less, and further preferably 3,000 or more and 6,000 or less. 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 slip resistance can be obtained. Further, when the content is 10,000 or less, a sufficient reactive group per molecule of the AFP agent can be sufficiently secured, and the adhesion to the surface of the glass plate 2 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 a natural antibacterial agent such as wasabi, a metal-based antibacterial agent such as copper and silver, and an oxide-based antibacterial agent such as titanium oxide. In particular, a solution containing silver is applied to the glass plate 2 to form a silver film, and the plate-like body on which the silver film is formed is heat-treated to diffuse silver ions from the surface of the glass plate 2 to the inside. Is preferable in terms of sustainability of the effect.

The anti-fog film is provided with a water-absorbent resin layer on the surface of the glass plate 2 and absorbs and removes 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 design. The antifogging film includes, for example, an underlayer and a water absorbing layer. The base layer is a layer for making it difficult for the water-absorbing layer to be peeled off from the glass plate, and is obtained, for example, by applying a composition containing a silane-based coupling agent to the glass plate 2 and reacting. 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 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 face of the glass decorative plate is protected during construction, so that it is difficult to crack and 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 places on each side, preferably at a plurality of places. As shown in FIG. 2, for example, the anchor 6 is penetrated into and engaged with the resin layer 3 of the decorative plate 1. 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 by 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 can 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 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, for example, a template glass in which a pattern is provided on the surface of the plate-like body with irregularities or the like.

Hereinafter, the present invention will be specifically described with reference to Examples and the like, but the present invention is not limited to these examples.

[Test body 1]
Six test pieces 1 composed of a glass plate having a thickness of 2 mm and an effervescent resin layer having a thickness of 3 mm were prepared. The glass plate and the resin layer were bonded with an acrylic resin adhesive.

The resin layer contains a chemically cross-linked polyethylene foam resin which is a skeleton resin, a bromine-based aromatic compound which is an organic flame retardant, and aluminum hydroxide which is an inorganic flame retardant. As shown in Table 1, the mass% of each component is 75% by mass for the skeletal resin, 15% by mass for the organic flame retardant, and 5% by mass for the inorganic flame retardant, assuming that the whole is 100% by mass as shown in Table 1. And other components were 5% by weight. The mass ratio of the flame retardant to the skeleton resin was 27%. The density of the resin layer was 70 (kg / m ³ ) or more and 80 (kg / m ³ ) or less.

The glass plate was soda lime glass and had a density of 2500 (kg / m ³ ).

The surface density of the test piece 1 was 5.2 (kg / m ³ ).

[Test body 2]
Six test bodies 2 similar to the test body 1 were prepared except that each component of the resin layer used in the test body 1 was changed to the mass% shown in Table 1.

[Test body 3]
Six test bodies 3 similar to the test body 1 were prepared except that each component of the resin layer used in the test body 1 was changed to the mass% shown in Table 1. As shown in Table 1, the test piece 3 does not contain a flame retardant.

[Test body 4]
Six test bodies 4 similar to test body 1 were prepared except that calcium carbonate was added as an inorganic filler to the skeleton resin of the resin layer used in test body 1 and each component was changed to the mass% shown in Table 1. did.

[Test body 5]
Six test bodies 5 similar to the test body 4 were prepared except that each component of the resin layer used in the test body 4 was changed to the mass% shown in Table 1.

[Test body 6]
Six test bodies 6 similar to the test body 4 were prepared except that each component of the resin layer used in the test body 4 was changed to the mass% shown in Table 1. Specimen 6 contains an inorganic filler but does not contain a flame retardant.

[Test body 7]
Six test bodies 7 similar to the test body 4 were prepared except that each component of the resin layer used in the test body 4 was changed to the mass% shown in Table 1. Specimen 7 contains an inorganic filler but does not contain a flame retardant.

[Test body 8]
Six test bodies 8 similar to the test body 4 were prepared except that each component of the resin layer used in the test body 4 was changed to the mass% shown in Table 1. Specimen 8 contains an inorganic filler but does not contain a flame retardant.

[Test body 9]
Six test pieces 9 composed of a glass plate having a thickness of 2 mm and an effervescent resin layer having a thickness of 3 mm were prepared. The glass plate and the resin layer were bonded with an acrylic resin adhesive.

The resin layer contains a chemically cross-linked polyethylene foam resin which is a skeleton resin, a phosphorus flame retardant which is an inorganic flame retardant, and aluminum hydroxide. As shown in Table 1, the mass% of each component is 55% by mass for the skeletal resin, 40% by mass for the inorganic flame retardant, and 5% by mass for the other components when the whole is 100% by mass. Met. The density of the resin layer was 150 (kg / m ³ ).

The glass plate was soda lime glass and had a density of 2500 (kg / m ³ ).

The areal density of the test piece 9 was 5.5 (kg / m ³ ).

[Test body 10]
Six test bodies 10 similar to the test body 9 were prepared except that each component of the resin layer used in the test body 9 was changed to the mass% shown in Table 1. As shown in Table 1, the test piece 10 does not contain a flame retardant.

[Test body 11]
Six test pieces 11 composed of a glass plate having a thickness of 2 mm and an effervescent resin layer having a thickness of 3 mm were prepared. The glass plate and the resin layer were bonded with an acrylic resin adhesive.

The resin layer includes a chemically cross-linked polyethylene foam resin which is a skeleton resin, a bromine-based aromatic compound which is an organic flame retardant, antimony trioxide which is an inorganic flame retardant, calcium carbonate, zinc oxide and the like as inorganic fillers. Includes. As shown in Table 1, the mass% of each component is 50% by mass for the skeletal resin, 20% by mass for the organic flame retardant, and 10% by mass for the inorganic flame retardant, when the whole is 100% by mass as shown in Table 1. The inorganic filler was 10% by mass, and the other components were 5% by mass. The mass ratio of the flame retardant to the skeleton resin was 60%. The density of the resin layer was 65 (kg / m ³ ) or more and 75 (kg / m ³ ) or less.

The glass plate was soda lime glass and had a density of 2500 (kg / m ³ ).

The areal density of the test piece 11 was 5.2 (kg / m ³ ).

<Evaluation method>
For the requirements stipulated in Article 108-2 of the Building Standards Act Enforcement Ordinance, a heat generation test using a cone calorimeter compliant with ISO5660-1 was conducted. Radiant heat of 50 kW / m ² was applied by a cone heater, and the total calorific value for 20 minutes was measured after the start of heating.

<Evaluation criteria>
For each test piece, the judgment was made as follows according to the total calorific value.
⊚: 4MJ / m ² or less ○: 4MJ / m ² or more and 6MJ / m ² or less Δ: 6MJ / m ² or more and 8MJ / m ² or less ×: 8MJ / m ² or more.

<Evaluation result>
As shown in Table 1, in the test bodies 1, 2, 4, 5, 9, and 11 containing the flame retardant, all 6 pieces were evaluated as ◯ or higher. In particular, 4 of the test bodies 4, 5 and 11 containing the flame retardant and the inorganic filler were ⊚. All of the test bodies 1 to 11 had impact absorption and resilience that could satisfy the impact test (JISC 8917: mass 227 ± 2 g, diameter about 38 mm, dropping a steel ball from a height of 1 m). ..

In the test bodies 3 and 10 containing no flame retardant and the inorganic filler, 2 were Δ. Further, in the test body 6 containing no flame retardant and containing an inorganic filler, the number of Δ was 2 and the number of ◯ was 1. The test piece 7 had two Δ and two ◯. In the test body 8, Δ was 1 and Δ was 4.

From this result, it was confirmed that the stability to the exothermic test can be imparted by including the flame retardant in the skeletal resin. Further, it was confirmed that the stability was further improved by further adding the inorganic filler.

1 Decorative plate 2 Glass plate 3 Resin layer 4 Design layer 5 Reinforcing material 6 Anchor

Claims (9)

It has a plate-like body having a design property and a foamable resin layer laminated on the plate-like body.
The plate-like body is made of a glass plate or a ceramic plate.
The plate-like body has a thickness of 0.5 mm or more and has a thickness of 0.5 mm or more.
The resin layer has a thickness of 1 mm or more, and the resin layer is a decorative board containing a skeleton resin and a flame retardant.
A decorative board having a mass ratio of the flame retardant to the skeletal resin of 20% or more. It has a plate-like body having a design property and a foamable resin layer laminated on the plate-like body.
The plate-like body is made of a glass plate or a ceramic plate.
The plate-like body has a thickness of 0.5 mm or more and has a thickness of 0.5 mm or more.
The resin layer has a thickness of 1 mm or more, and the resin layer is a decorative board containing a skeleton resin and a flame retardant.
The resin layer contains an inorganic filler and contains
The inorganic filler is a decorative board having a mass ratio of 20% or more with respect to the skeleton resin. The decorative plate according to claim 1 or 2, wherein the plate-shaped body is a glass plate. The decorative board according to any one of claims 1 to 3, wherein the resin layer has a closed cell structure. The decorative plate according to any one of claims 1 to 4, wherein the ratio (A / B) of the thickness A of the plate-like body to the thickness B of the resin layer is 50% or more. The decorative plate according to any one of claims 1 to 5, wherein the plate-shaped body is a tempered glass plate. The decorative board according to any one of claims 1 to 6, wherein the surface density is 10 kg / m ² or less. The decorative board according to any one of claims 1 to 7, wherein the density of the resin layer is 160 kg / m ³ or less. The decorative plate according to any one of claims 1 to 8, wherein the total calorific value for 20 minutes of the decorative plate in a heat generation test using a cone calorimeter compliant with ISO5660-1 is 6 MJ / m ² or less. ..

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