JP2011011337A - Material for plate material, decorative plate, and method for producing the material for plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop non-combustibility by sufficiently suppressing calorific value while using resin-based material.SOLUTION: The decorative plate 10 is equipped with the material for plate material 12 and a surface layer 14 laminated on the material for plate material 12. The material for plate material 12 is constituted of a laminated body provided with a thermoplastic resin layer 20 and at least an aluminum layer 16, a thermosetting resin such as melamine resin and a noncombustible core layer 18 having inorganic filler such as aluminum hydroxide. The aluminum layer 16 is arranged in the outer side of the non-combustible core layer 18.

Description

  The present invention relates to a plate material, a decorative plate, and a method for producing a plate material.

  In recent years, installation of materials requiring heat resistance such as incombustibility or flame retardance has been required at various locations. As a heat-resistant material having such incombustibility or flame retardancy, a metal material can be mentioned as a simple example. Among them, aluminum is relatively light and easy to process. Regarding heat resistance, it can be said that it is suitable as a material. However, when aluminum is used as it is, the cost increases, and as a result, there is a problem that the amount of use is limited.

  For this reason, as a substitute material for aluminum, in a thermosetting resin-based decorative board, an inorganic filler such as aluminum hydroxide is added to a melamine resin or the like to improve heat resistance (for example, (See Patent Documents 1 and 2). However, it is not always easy to disperse and mix aluminum hydroxide in a thermosetting resin or to apply or coat the obtained varnish. As a result, the resin is mainly applied to substrates such as nonwoven fabric and paper. In order to apply as a decorative board formed by laminating prepregs impregnated with bismuth and heating and pressurizing, advanced production techniques are required. For this reason, the present condition is that the board material which has a decorative external appearance as a decorative board, and also has sufficient heat resistance simultaneously is hardly provided.

  In addition, in particular, with regard to this heat resistance, the Building Standards Act was revised in 2000, and it is judged whether it conforms to the technical standards stipulated by the Cabinet Order for falling under the Article 2 item 9 The standard incombustible material test has been changed from the surface combustion test and the base material combustion test to the corn calorimeter exothermic test and the gas hazard test, and in order to use it as a noncombustible material, the calorific value must be suppressed. It has been requested. For this reason, with the resin-based heat-resistant decorative board as described above, it is difficult to suppress the amount of heat generation, and it is difficult to obtain the “non-combustible material” certification stipulated in Article 2-9 of the revised Building Standard Law. It has become.

JP-A-1-56539 JP-A-1-56540

  In view of the above problems, the problem to be solved by the present invention is suitable for a decorative board having sufficient heat resistance while suppressing the amount of heat generated while using a resin-based material and such a decorative board. A plate material and a method for producing the same are provided.

Such an object is achieved by the present invention described in the following (1) to (7).
(1) A plate material comprising a surface layer laminated on a surface to constitute a plate material, wherein the plate material includes at least a thermoplastic resin layer, an aluminum layer, and at least aluminum hydroxide as an inorganic filler. A non-combustible core layer containing magnesium hydroxide and a thermosetting resin, and an aluminum layer constitute a laminate in this order.
(2) The said thermoplastic resin layer is a board | plate material as described in said (1) containing a polyurethane resin.
(3) The said thermoplastic resin layer is a board | plate material as described in said (1) containing ethylene-vinyl acetate copolymer resin.
(4) A decorative board, wherein a decorative layer is laminated by heating and pressing as a surface layer on the design surface side of the plate material described in any one of (1) to (3).
(5) The decorative board according to (4), wherein a core material layer is further laminated on a surface of the plate material opposite to the design surface.
(6) A method for producing a plate material in which a surface layer is laminated on the surface to constitute a plate material, at least a thermoplastic resin layer, an aluminum layer, and at least aluminum hydroxide or magnesium hydroxide as an inorganic filler A non-combustible core layer containing a thermosetting resin and an aluminum layer are arranged and laminated in this order, and a method for producing a plate material.

  ADVANTAGE OF THE INVENTION According to this invention, while using the resin-type raw material, also suppressing the emitted-heat amount, the decorative board provided with sufficient heat resistance, the board | plate material suitable for such a decorative board, and its manufacturing method are provided. be able to.

It is a conceptual diagram of the decorative board showing one embodiment of this invention. It is a conceptual diagram of the decorative board showing one embodiment of this invention.

  FIG. 1 shows a decorative board 10 according to an embodiment of the present invention. The decorative board 10 is laminated on the surface of the plate material 12 according to the present invention and the plate material 12 as shown in FIG. And the surface layer 14 formed.

  In the illustrated embodiment, the surface layer 14 is a decorative layer 14A, and this decorative layer 14A is disposed on the design surface side of the plate material 12 of the present invention. In the illustrated embodiment, it is shown that a decorative layer 14A, which is a surface layer 14, is laminated on one side of the plate material 12, but when a design surface that requires decoration is set on both sides, Unlike the illustrated embodiment, the decorative layer 14A may be laminated on both sides. When a decorative layer is laminated on both sides, a thermoplastic resin layer may or may not be provided between the aluminum layer 16 and the decorative layer as shown in FIG.

  Further, when the design surface is set to only one surface, a core material layer (not shown) can be further laminated on the surface opposite to the design surface. The decorative board 10 is formed by forming the plate material 12, the decorative layer as the surface layer 14, etc., and then superposing them and heating and pressing to laminate each layer as shown in FIG. 1. Can be manufactured.

In addition, the surface layer 14 laminated | stacked on the board | plate material 12 of this invention is not necessarily limited to the decorative layer 14A, When using as an internal material which does not need a decoration in particular, as the surface layer 14 For example, veneer can be laminated, and metal materials can be laminated when it is necessary to ensure strength.
<1. Material for plate>
As shown in FIG. 1, the plate material 12 according to the present invention is a laminate including a thermoplastic resin layer 20, an aluminum layer 16, and a nonflammable core layer 18 having a thermosetting resin and an inorganic filler. It is made up.
<1-1. Thermoplastic resin layer>
The thermoplastic resin layer 20 has good adhesion between the cosmetic layer on the surface and the aluminum layer, and in order to be able to bend by heating, the decorative layer is cracked by sliding between the cosmetic layer on the surface and the aluminum layer. Use thermoplastic resin to prevent. In order to improve the adhesiveness with the aluminum layer, a thermoplastic resin having a strong polarity is preferable. From the viewpoint of cost, an ethylene-vinyl acetate copolymer resin is preferable. Are more preferred. The thickness is preferably 100 μm or less. If it is thicker than 100 μm, the filling amount of the decorative layer is excessively increased, and the surface of the decorative layer may be broken.
<1-2. Aluminum layer>
The aluminum layer 16 is made of an aluminum foil or an aluminum plate, and has a function of mainly imparting heat resistance to the plate material 12. The aluminum layer 16 is desirably set to a thickness of at least 0.1 mm. This is because if the thickness is less than 0.1 mm, non-flammability cannot be secured sufficiently. The upper limit is not particularly limited, and the greater the thickness, the better the incombustibility. However, the thickness and weight of the plate material 12 and thus the decorative plate 10 as a whole increase and the cost increases. It is preferable to set within an allowable range in terms of design in a simple product, and when used as the decorative board 10, it is preferable to set it to 0.3 mm or less.
<1-3. Nonflammable core layer>
Specifically, the nonflammable core layer 18 is made of a glass fiber nonwoven fabric impregnated with an inorganic filler such as aluminum hydroxide or magnesium hydroxide and a thermosetting resin such as melamine resin or phenol resin. The nonflammable core layer 18 can be formed by producing a blend of an inorganic filler and a thermosetting resin and impregnating the blend into a glass fiber nonwoven fabric as a base material.

In this case, the glass fiber nonwoven fabric is used as the base material because it is suitable for infiltrating the mixture of the inorganic filler and the thermosetting resin. Specifically, it is desirable to use a glass fiber nonwoven fabric having a basis weight of 30 to 150 g / cm ² . In a glass fiber nonwoven fabric having a basis weight of less than 30 g / cm ² , the strength and self-retaining property are not sufficient, and thus a glass fiber nonwoven fabric as a base material is coated with a blend of an inorganic filler and a thermosetting resin. In some cases, the glass fiber nonwoven fabric having a basis weight of more than 150 g / cm ² may have insufficient adhesion between the layers at the time of molding by lamination. Because there is.

  On the other hand, examples of the thermosetting resin containing an inorganic filler such as aluminum hydroxide or magnesium hydroxide having flame retardancy include melamine resin, phenol resin, and the like. It is most desirable to add it to the resin. This is because when melamine resin is used, it is possible to sufficiently secure the viscosity necessary for appropriately holding the inorganic filler, compared to the case of using other thermosetting resins such as phenol resin, This is because when this melamine resin is used as a binder, it can be applied to a glass fiber nonwoven fabric by a comma coater or the like, and good handleability can be secured. However, even when a phenol resin is used, as shown in the examples described later, the certification test as a non-combustible material intended by the present invention can be passed.

  In this case, the inorganic filler and the thermosetting resin have an inorganic filler 90 with respect to 10 to 30% by weight of the thermosetting resin when the total amount of the inorganic filler and the thermosetting resin is 100% by weight. It is desirable to blend at a ratio of ˜70% by weight. That is, for example, when the thermosetting resin is set to 10% by weight, the inorganic filler is 90% by weight, and when the thermosetting resin is set to 20% by weight, the inorganic filler is 80% by weight. When the functional resin is set to 30% by weight, the inorganic filler is preferably set to 70% by weight. In this case, the higher mixing ratio of the inorganic filler is set to ensure sufficient nonflammability, and the thermosetting resin has a role as a binder for the inorganic filler. .

  This is because if the thermosetting resin is less than 10% by weight, the thermosetting resin cannot sufficiently function as a binder, and the binding force is insufficient at the time of handling as the plate material 12 as a core material. This is because handling may be difficult, and as a result, the interlayer adhesive strength may become insufficient in the decorative board 10 after molding. In addition, it is necessary to use an expensive and special mixer to prevent the viscosity from rising or remaining in the state, or it is necessary to lower the viscosity with a solvent or water. Further, in the coating process, a high viscosity resin liquid is applied. When technology is required, or when the viscosity is lowered with a large amount of solvent or water, environmental pollution such as increase of carbon dioxide gas due to solvent combustion, and energy and process for drying become enormous. This increases the cost, which is not preferable. On the other hand, if the thermosetting resin exceeds 30% by weight (if the inorganic filler is less than 70% by weight), the nonflammable effect is lowered, it is not preferable.

  In addition, when blending these aluminum hydroxides or magnesium hydroxide and thermosetting resin, if inorganic fillers such as carbon are added in addition to aluminum hydroxide or magnesium hydroxide, the dispersibility of aluminum hydroxide or magnesium hydroxide Is preferable. In addition, melamine resin, phenol resin, aluminum hydroxide, or magnesium hydroxide may be partially replaced with other resin or inorganic filler as long as the object and effect of the present invention are not impaired. It is included in the scope of the present invention.

  The blend of the inorganic filler and the thermosetting resin is used as it is or diluted with a solvent such as water or alcohol. In this blend, when the ratio of water, alcohol and other solvents (including those originally contained in the resin) is the dilution ratio, the dilution ratio depends on the ratio of the resin in the blend. Usually, it is about 0.05 to 0.5, preferably about 0.1 to 0.3. If it is smaller than this range, the viscosity of the blend may be high and coating may be difficult. On the other hand, if it is larger than this range, the viscosity may be low and the coated blend may be difficult to hold on the glass fiber nonwoven fabric.

  Next, the non-combustible core layer 18 is formed by impregnating the glass fiber nonwoven fabric, which is a base material, by coating the glass fiber nonwoven fabric with the diluted inorganic filler and thermosetting resin blend. Is done. In this case, as this coating, for example, by applying various normal coater devices such as a comma coater and a die coater, or by spraying with a spray device such as a spray or a nozzle, a shearing force is applied to the inorganic filler. The substrate can be impregnated without loading. In the present invention, this is possible because, as described above, the inorganic filler is blended with an appropriate material such as a melamine resin at an appropriate blending ratio, so that good handleability is ensured. That is.

  In this case, when the ratio of the inorganic filler and thermosetting resin compound (solid content) to the glass fiber nonwoven fabric during coating is the impregnation ratio, the impregnation ratio depends on the basis weight of the glass fiber nonwoven fabric. The ratio is usually about 5 to 100 times, preferably about 10 to 60 times. This is because if it is less than the above lower limit value, it is difficult to maintain the required thickness and the surface finish may not be sufficient. Furthermore, the flame resistance decreases and the cost increases. On the other hand, if the above upper limit is exceeded, the flame resistance is good, but disadvantages such as being easily broken when handling the material before lamination are caused.

  In addition, the melamine resin which is a suitable example as a thermosetting resin is usually used in a molar ratio of formaldehyde to melamine (hereinafter simply referred to as a molar ratio) of 1.0 to 4.0. It is not limited to the range. However, from the viewpoint of storage stability as a resin varnish, it is preferably in the range of 1.0 to 2.0, and an acidic curing agent can be appropriately blended.

  On the other hand, aluminum hydroxide or magnesium hydroxide as the inorganic filler is not particularly limited, but those having an average particle diameter of 1 to 100 μm can be preferably used. In addition, you may mix and use what has a large particle diameter and a small thing, and may close-pack.

The nonflammable core layer 18 is formed by laminating a plurality of glass fiber nonwoven fabrics impregnated with the inorganic filler and melamine resin thus formed, as shown in FIG. For this reason, it is possible to form thin glass fiber nonwoven fabrics one by one, and it becomes easy to sufficiently impregnate each glass fiber nonwoven fabric, which is a base material, using a resin. Unlike the case where it is infiltrated into a thick base material, the inorganic filler can be uniformly dispersed in almost all cross sections of the non-combustible core layer by using a plurality of prepregs in which the inorganic filler has sufficiently penetrated to the inside. Therefore, the incombustible effect can be enhanced. In addition, this nonflammable core layer 18 may also be provided with a reinforcing layer or the like as long as it has at least a glass fiber nonwoven fabric impregnated with a thermosetting resin blended with an inorganic filler.
<2. Makeup layer>
On the other hand, the original material of the decorative layer 14 laminated on the plate material 12 as the surface layer 14 is not particularly limited. Also in the present invention, as with the normal decorative layer, thermosetting such as melamine resin is performed. After preparing a liquid varnish containing an adhesive resin and impregnating it into a sheet substrate such as gravure printing paper, the solvent is removed by heating and drying at about 50 ° C. to 60 ° C. to obtain a thermosetting resin. A semi-cured prepreg can be used. In this case, the method for impregnating the varnish into the paper substrate is not particularly limited, and a method using a kiss coater which is usually performed can be employed, and a method by dipping can also be employed.

In this case, the sheet substrate is not particularly limited, but preferably pulp, linter, synthetic fiber, glass fiber or the like can be used, and a basis weight of 40 to 150 g containing a pigment such as titanium oxide as necessary. / M ² sheet or paper.

  On the other hand, the thermosetting resin impregnated in the sheet substrate is not particularly limited. For example, the melamine resin can be used alone, but in order to further improve the heat resistance, the melamine resins 60 to 95 are used. It is possible to use impregnated sheets or paper impregnated with a formulation consisting of 40% by weight of aluminum hydroxide or magnesium hydroxide or silica by weight of 5 to 5%. The impregnation rate of this melamine resin or compound is usually 50 to 80% by weight with respect to the sheet or paper. As the melamine resin, a resin to which an ordinary modifier (for example, glycols) is added in an amount of 0.1 to 20% by weight can be used, and an acidic curing agent can be appropriately blended.

In addition, a sheet or paper having a basis weight of 10 to 50 g / m ² was impregnated with a melamine resin alone or a composition comprising melamine resin 60 to 95% by weight, aluminum hydroxide, magnesium hydroxide or silica 40 to 5% by weight. A combination of overlay impregnated papers can be laminated. The impregnation ratio of the melamine resin or the blend of this overlay impregnated paper is 50 to 80% by weight with respect to a normal sheet or paper. Moreover, this overlay impregnated paper can be combined with the surface of a decorative sheet or decorative paper not impregnated with resin.

The decorative layer 14A is laminated and integrated on the surface of the plate material, but it is also preferable to install it on the back side in order to prevent warpage. Both of these decorative layers 14A desirably have a thickness of 0.5 mm or less and an organic substance amount of 360 g / m ² or less.
<3. Processing to decorative board>
The plate material 12 and the decorative layer 14 </ b> A which is the surface layer 14 can be made into the decorative plate 10 by laminating and heating and pressing each layer, as in the case of the normal high-pressure resin decorative plate 10. . In this case, however, in the present invention, as shown in FIG. 1, the aluminum layer 16 is disposed outside the nonflammable core layer 18. Furthermore, as shown in FIG. 1, the aluminum layer 16 is desirably disposed on both sides of the nonflammable core layer 18.

  That is, in the present invention, as shown in FIG. 1, a plurality of thermoplastic resin layers 20 and aluminum layers 16 are stacked, and a plurality of nonflammable core layers 18 are inserted therebetween (aluminum layer 16 and nonflammable core layer 18). In order of the aluminum layer 16), the surface layer 14 is superimposed on the surface side or both sides thereof, and these are heated and pressed to obtain the decorative board 10.

In addition, at the time of heat-press molding as the decorative board 10, the plate material 12 and the decorative layer 14 are pressurized at about 60 to 100 kg / cm ² while being heated at a temperature at which the thermosetting resin is cured. It is preferable. At the time of molding, a mirror-finished plate, an embossed plate, an embossed film, or the like can be stacked to finish a surface such as a mirror finish or an embossed finish.

Next, an example of the decorative board 10 of the present invention and a comparative example for verifying the effect will be described. About the blend of the inorganic filler and the thermosetting resin constituting the nonflammable core layer 18, the ratio of the thermosetting resin to the total amount of 100 wt% of the inorganic filler and the thermosetting resin is 30 in Example 1. % By weight, 10% by weight in Example 2, 8% by weight in Comparative Example 1, and 32% by weight in Comparative Example 2, respectively. As thermosetting resins, melamine resin was used for Example 1 and Comparative Example 2, and phenol resin was used for Example 2 and Comparative Example 1. On the other hand, as the inorganic filler, magnesium hydroxide was used for Example 1 and Comparative Example 2, and aluminum hydroxide was used for Example 2 and Comparative Example 1.
Example 1
(A) A melamine decorative layer was obtained by impregnating a titanium decorative paper with a weight of 80 g / m ² with a melamine resin for post foam. A glass fiber nonwoven fabric having a basis weight of 75 g / m ² , a specific gravity of 0.23 g / cm ³ , and an organic binder amount of 11%, magnesium hydroxide (average particle diameter 10 μm) 70% by weight, melamine resin (molar ratio 1.5, resin) (B) Nonflammable core layer 18 having an impregnation rate of 20 times was obtained by coating a composition comprising 30 wt% (solid content: 50 wt%) (solid content conversion, hereinafter the same) and 15 parts by weight of water and alcohol. . As the aluminum layer 16, (c) aluminum foil having a thickness of 0.3 mm was used. On the other hand, a urethane hot melt film (UH203 manufactured by Nippon Matai Co., Ltd.) having a thickness of 70 μm was used as (d) the thermoplastic resin layer 20. Then, these are laminated in the order of (a) 1 sheet, (d) 1 sheet, (c) 1 sheet, (b) 4 sheets, and (c) 1 sheet, and 20 under the conditions of 140 ° C. and 80 kg / cm ^2. The sample (1) having a thickness of 4.1 mm was obtained by heating and pressing for minutes.
(Example 2)
(A) A melamine decorative layer was obtained by impregnating a titanium decorative paper with a weight of 80 g / m ² with a melamine resin for post foam. In the same glass fiber nonwoven fabric as used in Example 1, 90% by weight of aluminum hydroxide (average particle size 10 μm) and 10% by weight of phenol resin (molar ratio 1.5, resin solid content 50% by weight) (solid content) (Conversion, the same applies hereinafter) and a composition comprising 15 parts by weight of water and alcohol was applied to obtain (b) an incombustible core layer 18 having an impregnation rate of 20 times. As the aluminum layer 16, (c) aluminum foil having a thickness of 0.1 mm was used. On the other hand, an ethylene-vinyl acetate copolymer resin (EVA) hot melt film (OH501, manufactured by Nippon Matai Co., Ltd.) having a thickness of 80 μm was used as (d) the thermoplastic resin layer 20. And these were laminated | stacked in order of (a) 1 sheet, (d) 1 sheet, (c) 1 sheet, (b) 4 sheets, (c) 1 sheet similarly to Example 1, 140 degreeC, 80 kg. The sample (2) having a thickness of 4.0 mm was obtained by heating and pressing under a condition of / cm ² for 20 minutes.
(Comparative Example 1)
(A) A melamine decorative layer was obtained by impregnating a titanium decorative paper with a weight of 80 g / m ² with a melamine resin for post foam. The same glass fiber nonwoven fabric as used in Example 1, 92% by weight of aluminum hydroxide (average particle size 10 μm), 8% by weight of the same phenolic resin as used in Example 2, and 15 parts by weight of water and alcohol (B) Incombustible core layer 18 having an impregnation rate of 20 times was obtained. As the aluminum layer 16, (c) aluminum foil having a thickness of 0.1 mm was used. On the other hand, (e) a core layer obtained by impregnating a kraft paper with a phenol resin was used in place of the thermoplastic resin layer. And these are laminated in the order of (a) 1 sheet, (e) 1 sheet, (c) 1 sheet, (b) 4 sheets, (c) 1 sheet, under the conditions of 140 ° C. and 80 kg / cm ² . Molding was performed for 20 minutes to obtain a sample (3) having a thickness of 4.0 mm. That is, in Comparative Example 1, the core layer in which kraft paper was impregnated with phenol resin was used instead of the thermoplastic resin layer, and only in terms of the blending ratio of aluminum hydroxide and phenol resin, Example 2 and In contrast, this is a comparative example in which the weight percent of the thermosetting resin is below the lower limit in the present invention.
(Comparative Example 2)
(A) A melamine decorative layer was obtained by impregnating a titanium decorative paper with a weight of 80 g / m ² with a melamine resin for post foam. The same glass fiber nonwoven fabric as used in Example 1, 68% by weight of magnesium hydroxide (average particle size 10 μm), 32% by weight of the same melamine resin used in Example 1, and 15 parts by weight of water and alcohol (B) Incombustible core layer 18 having an impregnation rate of 20 times was obtained. As the aluminum layer 16, (a) aluminum foil having a thickness of 0.3 mm was used. On the other hand, (e) a core layer obtained by impregnating a kraft paper with a phenol resin was used in place of the thermoplastic resin layer. And these are laminated in the order of (a) 1 sheet, (e) 1 sheet, (c) 1 sheet, (b) 4 sheets, (c) 1 sheet, under the conditions of 140 ° C. and 80 kg / cm ² . Molding was performed for 20 minutes to obtain a sample (4) having a thickness of 4.0 mm. That is, in Comparative Example 2, the core layer in which kraft paper was impregnated with phenol resin was used instead of the thermoplastic resin layer, and only in terms of the blending ratio of magnesium hydroxide and melamine resin, Example 1 and In contrast, this is a comparative example in which the weight percent of the thermosetting resin exceeds the upper limit in the present invention.

  The characteristics of the samples (1) to (4) obtained in the above examples were evaluated, and the results are shown in Table 1.

(Test method)
1. Non-combustibility test The Japanese Standard Building Laboratory's Operation Standards “Fireproof and Fireproof Performance Test / Evaluation Procedure Method” 4.10 (2) ii) 4.10.2 Exothermic test / evaluation method and 4.10. The gas toxicity test / evaluation method of 3 was used. The above items of the business standard "Fireproof and Fireproof Performance Test / Evaluation Business Method" describe performance evaluation methods related to certification based on the provisions of Article 2, Item 9 (non-combustible materials) of the Building Standards Act.
2. Interlaminar strength Conforms to the JAS plane tensile test.
3. Heat bending test A V-cut was made on the back surface of the sample, and the thickness from the thinnest V-shaped tip to the sample surface was cut to a remaining 0.5 mm. A 3R bending formability test was performed in accordance with the bending formability test of JIS K6902.

  As is clear from the results shown in Table 1 above, the samples (1) and (2) obtained in Examples 1 and 2 are appropriately equipped so that the nonflammability meets the standards and the like. On the other hand, the sample (3) obtained in Comparative Example 1 has sufficient incombustibility but low interlaminar strength, and there is a problem in terms of strength when the blending ratio of the thermosetting resin is less than the range of the present invention. Is proven to remain.

  While (1) and (2) using a thermoplastic resin for adhesion between the surface layer and the aluminum layer showed good bending formability without causing cracks in the surface layer even after heat bending, phenolic resin was used for adhesion. (3) and (4) using No. 3 are the results of bending formability NG because the surface layer is cracked by heat bending.

  Moreover, the sample (4) obtained in Comparative Example 2 could not clear the standard for nonflammability. From this, it was confirmed that if the blending ratio of the inorganic filler is less than the range of the present invention, the incombustibility cannot be cleared.

  The decorative board according to the present invention has both sufficient nonflammability and interlayer strength. Furthermore, since the decorative layer can use the same decorative layer sheet material as a conventional decorative plate, it can be freely selected from abundant color patterns and is subject to restrictions on nonflammable materials in public facilities, etc. It can be widely applied to applications.

DESCRIPTION OF SYMBOLS 10 Decorative plate 12 Material for plate material 14 Surface layer 14A Decorative layer 16 Aluminum layer 18 Nonflammable core layer 20 Thermoplastic resin layer

Claims (6)

A surface layer is laminated on the surface, and is a plate material constituting a plate material,
The plate material includes at least a thermoplastic resin layer, an aluminum layer, an incombustible core layer containing at least aluminum hydroxide or magnesium hydroxide and a thermosetting resin as an inorganic filler, and an aluminum layer in this order. A plate material comprising a laminate.   The plate material according to claim 1, wherein the thermoplastic resin layer includes a polyurethane resin.   The plate material according to claim 1, wherein the thermoplastic resin layer includes an ethylene-vinyl acetate copolymer resin.
A decorative board, wherein a decorative layer as a surface layer is laminated by heating and pressing on the design surface side of the material for a plate material according to any one of claims 1 to 3.
It is a decorative board described in Claim 4, Comprising: The decorative board by which the core material layer is further laminated | stacked on the surface on the opposite side to the said design surface side of the said board | plate material.
A method for producing a material for plate material in which a surface layer is laminated on the surface to constitute a plate material,
At least a thermoplastic resin layer, an aluminum layer, an incombustible core layer containing at least aluminum hydroxide or magnesium hydroxide and a thermosetting resin as an inorganic filler, and an aluminum layer are arranged and laminated in this order. A method for producing a plate material characterized by the above.

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