KR102009071B1 - Decorative board - Google Patents

Abstract

The decorative plate 7 of the present invention comprises a core layer 4 including a fibrous base material, a thermoplastic resin, and an endothermic metal hydroxide, an intermediate layer 2 including a kraft paper and a thermosetting resin containing an endothermic metal hydroxide, and a toilet paper; The cosmetic layer 1 containing a thermosetting resin is provided, and the quantity of the said thermoplastic resin which the core layer 4 contains is 10-100 g / m <2>.

Description

Vanity board {DECORATIVE BOARD}

The present invention relates to a decorative plate.

This International Application claims the priority based on Japanese Patent Application No. 2014-71573, filed with the Japan Patent Office on March 31, 2014, and has obtained all the contents of Japanese Patent Application No. 2014-71573. It is used as a reference.

Conventionally, thermosetting resin decorative plates, such as a melamine decorative board, are known (refer patent document 1, 2). This decorative board is widely used for home appliances, interior materials (for example, top plates, counters, etc.).

Patent Document 1: Japanese Unexamined Patent Publication No. 2008-290444

Patent Document 2: Japanese Unexamined Patent Publication No. 2013-99939

The conventional makeup plate has a problem that warpage is likely to occur. In one aspect of the present invention, it is desirable to provide a decorative plate capable of suppressing warpage.

In one aspect of the present invention, the decorative plate includes an intermediate layer including a core layer including a fibrous substrate, a thermoplastic resin, and an endothermic metal hydroxide, and a honcho paper and a thermosetting resin including an endothermic metal hydroxide, and a toilet paper and a thermosetting resin. It comprises a cosmetic layer comprising a, the amount of the thermoplastic resin contained in the core layer is 10 to 100g / ㎡. The decorative plate of the present invention can suppress warpage.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the structure of the makeup board of Example 1 of this invention.
2 is a cross-sectional view showing the configuration of a decorative plate of a fourteenth embodiment of the present invention.
3 is a photograph of the decorative plate of Example 1 in a state in which light of a bar fluorescent lamp is projected.
4 is a photograph of the decorative plate of Comparative Example 1 in a state in which light of a bar fluorescent lamp is projected.

An embodiment of the present invention will be described.

(One) Core layer

The decorative plate of the present invention has a core layer. The core layer comprises a fibrous substrate, a thermoplastic resin and an endothermic metal hydroxide.

As a fibrous base material, an organic fiber base material, an inorganic fiber base material, etc. are mentioned, for example. Examples of the organic fiber substrate include polyethylene, polypropylene, vinylon, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, polyamide, polyester, polyurethane, modified products thereof, and ethylene-vinyl acetate copolymers. The fiber which consists of various copolymers represented, and mixtures thereof are mentioned.

As an inorganic fiber base material, the nonwoven fabric, woven fabric, etc. which consist of inorganic fibers, such as glass fiber, rock wool, and carbon fiber, are mentioned, for example. The basis weight of the inorganic fiber base material is preferably in the range of 10 to 200 g / m 2. In the case of using an inorganic fiber base material, the nonflammability of a decorative plate is further improved compared with the case of using an organic fiber base material. Among the inorganic fiber substrates, in particular, when glass fiber nonwoven fabric is used, heat resistance, flame resistance, and slurry impregnation resistance are further improved.

The thermoplastic resin functions as a binder, for example. As the thermoplastic resin, an acrylic resin emulsion is preferable. In particular, when an acrylic resin emulsion having a glass transition temperature (Tg) of more than 0 degrees is used, adhesion and formability of the core layer are improved, and therefore, more preferable.

Among the acrylic resin emulsions having a Tg of more than 0 degrees, the use of an acrylic resin emulsion having an average particle diameter of 150 to 300 nm is more preferable because the binding force of the core layer and the bending workability and smoothness of the decorative plate can be further improved.

The reason why the smoothness of the decorative plate is improved is that the acrylic resin emulsion is fine particles. In addition, an average particle diameter is the value computed according to the scattered light detected at the time of laser irradiation using the laser beam diffraction scattering particle diameter measuring apparatus (ELS-8000 by Otsuka Electronics Co., Ltd.).

The amount of the thermoplastic resin contained in the core layer (weight of the thermoplastic resin contained in the unit area core layer) is 10 to 100 g / m 2. The nonflammability of a decorative plate improves further by being 100 g / m <2> or less. Moreover, when manufacturing a decorative board by thermo-pressure molding by 100 g / m <2> or less, it becomes difficult to produce a thermoplastic resin seeping out.

Moreover, when manufacturing a core layer by a prepreg because the quantity of the thermoplastic resin which a core layer contains is 10 g / m <2> or more, adhesiveness of prepregs improves further. Moreover, when impregnating a slurry to a fibrous base material by 10 g / m <2> or more and manufacturing a core layer, the impregnation amount of a slurry can be adjusted more easily.

The endothermic metal hydroxide contains crystal water and decomposes at a high temperature to release water. Since the reaction for decomposing and releasing water is an endothermic reaction, the core layer containing the endothermic metal hydroxide has the effect of suppressing the temperature rise of the makeup plate upon combustion and improving the incombustibility of the makeup plate.

Examples of the endothermic metal hydroxide include aluminum hydroxide, magnesium hydroxide, calcium hydroxide, and the like, and aluminum hydroxide and magnesium hydroxide are particularly preferable. When aluminum hydroxide or magnesium hydroxide is used, the effect of improving the incombustibility of the decorative plate is further remarkable.

The amount of the endothermic metal hydroxide contained in the core layer (weight of the endothermic hydroxide contained in the core layer of the unit area) is preferably in the range of 100 to 300 g / m 2. By being in this range, when manufacturing a core layer with a prepreg, the adhesiveness of prepregs can be improved and the incombustibility of a makeup plate can be improved.

The average particle diameter of an endothermic metal hydroxide can be in the range of 1-50 micrometers, for example. This average particle diameter is an arithmetic mean diameter calculated from the particle size distribution (volume distribution) detected by the laser diffraction scattering method (micro track method).

When the average particle diameter of the endothermic metal hydroxide is in the above range, the dispersibility of the endothermic metal hydroxide in the slurry is improved, and the slurry impregnation property of the fibrous substrate is improved. In addition, the surface of the makeup plate is smoothly finished.

The core layer may contain an inorganic filler other than the endothermic metal hydroxide, a silane coupling agent, a flame retardant, or the like. Examples of the inorganic fillers include carbonates such as calcium carbonate, magnesium carbonate and zinc carbonate, silica, talc and fly ash. The average particle diameter of an inorganic filler can be in the range of 0.05-20 micrometers, for example. When the average particle diameter is within this range, the slurry impregnation aptitude to the fibrous substrate is further improved. In addition, the average particle diameter of an inorganic filler is an arithmetic mean diameter computed from the particle size distribution (volume distribution) detected by the laser diffraction and the scattering method (micro track method).

Among the inorganic fillers, carbonates (for example, calcium carbonate) are particularly preferable. When calcium carbonate is used, workability and cutting property in the manufacturing process of a decorative board are further improved. As calcium carbonate, heavy calcium carbonate, hard calcium carbonate (precipitating calcium carbonate), etc. can be used, for example. The average particle diameter of calcium carbonate can be 0.05-10 micrometers, for example, More preferably, it can be 0.1-5 micrometers. By setting the average particle diameter of calcium carbonate to 0.05 µm or more, aggregation of calcium carbonate is less likely to occur in the slurry, and the slurry impregnation ability to the fibrous substrate is improved. Moreover, by making the average particle diameter of calcium carbonate into 10 micrometers or less, the surface of a decorative board becomes smoother and the external appearance of a decorative board improves.

Hard calcium carbonate refers to calcium carbonate that is chemically produced by calcining limestone, and heavy calcium carbonate refers to finely divided calcium carbonate formed by dry or wet grinding of white crystalline limestone.

The blending ratio of the endothermic metal hydroxide in the total inorganic filler included in the core layer can be, for example, 30 to 100% by weight. If it is more than 30% by weight, the nonflammability of the decorative plate is further improved. Moreover, when it is 100 weight% or less, the machinability of a decorative board improves further.

In the case where the core layer contains a silane coupling agent, the weight increase rate is further smaller in the abrasion resistance of JIS K-6902 'Thermosetting resin high pressure makeup plate test method' than in the case where the silane coupling agent is not included. The adhesion between the core layer and the intermediate layer is further improved.

The amount of the silane coupling agent contained in the core layer (the weight of the silane coupling agent contained in the core layer of the unit area) is preferably in the range of 1 to 15 g / m 2. By setting it in this range, the effect by the silane coupling agent mentioned above becomes remarkable further.

As a silane coupling agent, (meth) acryloyloxy-group containing silanes, such as 3- (meth) acryloyloxy propyl trimethoxysilane and 3- (meth) acryloyloxy propyl triethoxysilane, for example, vinyl tri Vinyl group-containing silanes such as methoxysilane and vinyl triethoxysilane, 3-glycidoxy propyl trimethoxysilane, 3-glycidoxy propyl methyldimethoxysilane, 3-glycidoxy propyl triethoxysilane, and the like. Styryl group containing silanes, such as an epoxy group containing silane and p-styryl trimethoxysilane, 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, and 3- (2-aminoethyl) aminopropyl trimethoxy Mercapto groups such as silane, amino group-containing silanes such as 3phenylaminopropyl trimethoxysilane, 3-mercaptopropyl trimethoxysilane, 3-mercaptopropyl triethoxysilane, and 3-mercaptopropyl methyldimethoxysilane Containing silane and so on Can be mentioned. When an epoxy group containing silane and an amino group containing silane are used especially, the crosslinking density in a core layer will improve further.

As the flame retardant, a phosphorus flame retardant, a nitrogen flame retardant, and a phosphorus-nitrogen flame retardant are preferably used, and a phosphorus-nitrogen flame retardant is particularly preferable. Phosphorus-nitrogen flame retardant is a compound which has a function of a phosphorus flame retardant and a nitrogen flame retardant. Phosphorus-nitrogen-based flame retardants have a phosphorus atom and a nitrogen atom together in one molecule. When exposed to high temperatures, phosphorus blocks oxygen by strong dehydration, nitrogen generates ammonia gas, and blocks oxygen. By this action, the adiabatic and flame retardant effect of the phosphorus-nitrogen flame retardant is high. Therefore, the core layer containing a phosphorus-nitrogen flame retardant has a high nonflammable performance.

When the total amount of the phosphorus-nitrogen flame retardant is 100% by weight, the total phosphorus content ratio is preferably 1 to 50% by weight and the total nitrogen content is 1 to 50% by weight, and the total phosphorus content is 1 to 30% by weight. It is further more preferable that the total nitrogen content ratio is 5 to 35% by weight.

When the total phosphorus content ratio and the total nitrogen content ratio are within the above ranges, the nonflammable performance is further improved.

The amount of the flame retardant contained in the core layer (the weight of the flame retardant contained in the core layer of the unit area) is preferably in the range of 1 to 100 g / m 2. By being in this range, the effect by the flame retardant mentioned above becomes further remarkable.

The core layer is formed by, for example, impregnating a fibrous substrate with a slurry containing a thermoplastic resin, an endothermic metal hydroxide, or the like to produce a prepreg, and thermoforming the one or more (for example, two) prepregs thus prepared. It can be produced by the method. The slurry used may further contain a silane coupling agent, a flame retardant, or the like.

When impregnating a slurry into a fibrous base material to produce a core layer, it is preferable that the value of the impregnation rate represented by Formula (1) is in the range of 500 to 1200%.

In Equation 1, 'weight before impregnation' means the weight of the fibrous substrate. "Weight after impregnation" means the weight after impregnating and drying a slurry to a fibrous base material. When the impregnation rate is 1200% or less, dropping of the slurry solids in the prepreg can be suppressed, and the prepreg can be easily handled. When the value of the impregnation rate is 500% or more, the interlayer peeling of the prepreg hardly occurs.

When impregnating a slurry into a fibrous substrate to produce a core layer, the thermoplastic resin in the core layer and the endothermic metal are adjusted by adjusting the blending ratio of the thermoplastic resin, the endothermic metal hydroxide, the silane coupling agent, and the flame retardant in the slurry. Content of a hydroxide, a silane coupling agent, a flame retardant, etc. can be made into the preferable range mentioned above.

For example, the compounding ratio of the thermoplastic resin in a slurry can be 3 to 17 weight% in conversion of solid content. Moreover, the compounding ratio of the endothermic metal hydroxide in a slurry can be 20-95 weight%. Moreover, the compounding ratio of the silane coupling agent in a slurry can be 0.1 to 10 weight% in conversion of solid content. Moreover, the compounding ratio of the flame retardant in a slurry can be 0.1 to 15 weight% in conversion of solid content. In addition, the compounding ratio in the slurry mentioned above is a value when the whole quantity of a slurry is 100 weight%.

(2) middle layer

The intermediate layer includes kneaded paper and a thermosetting resin containing an endothermic metal hydroxide. By this intermediate | middle, the base of a core layer becomes hard to be revealed to a decorative board surface, the smoothness of a decorative board surface improves, and the curvature of a decorative board is suppressed.

The kneaded paper containing the endothermic metal hydroxide is obtained by, for example, papermaking a slurry containing pulp and the endothermic metal hydroxide and dehydrating and drying.

Examples of the pulp include natural pulp such as wood pulp, cotton pulp and plant fiber pulp. In particular, chemical pulp chemically treated with short-fiber wood pulp, such as hardwood bleached kraft pulp and softwood kraft pulp, is preferable because it improves the strength and impregnability of honcho paper. Hardwood bleached kraft pulp and softwood kraft pulp may be used in combination. The coniferous kraft pulp may be any of bleached and unbleached.

Examples of the endothermic metal hydroxide include aluminum hydroxide, magnesium hydroxide, calcium hydroxide, and the like, and aluminum hydroxide and magnesium hydroxide are particularly preferable. When aluminum hydroxide or magnesium hydroxide is used, the effect of improving the incombustibility of the decorative plate is further remarkable.

When the total amount of the endothermic metal hydroxide and the pulp is 100% by weight, the ratio of the endothermic metal hydroxide (unit: wt%) is the kneading ratio of the endothermic metal hydroxide in the kneaded paper containing the endothermic metal hydroxide. do. 40 to 95 weight% is preferable and, as for the mixing ratio of an endothermic metal hydroxide, 55 to 85 weight% is more preferable. If the kneading ratio of the endothermic metal hydroxide is 40% by weight or more, the fire retardant performance of the makeup plate is further increased, and if it is 95% by weight or less, the paper strength of the kneaded paper is further increased.

In addition to the pulp and the endothermic metal hydroxide, for example, a flocculant binder, a medicament, an organic fiber, an inorganic fiber, a fixing agent, and the like can be added to the slurry. In the papermaking process, a circular mesh paper machine, a long mesh multi-cylinder paper machine, a long mesh-to-net combination paper machine, a gradient paper machine, and the like can be used. The basis weight of the blend paper containing the endothermic metal hydroxide can be, for example, 60 to 200 g / m 2. When the basis weight of the blended paper is within this range, the smoothness of the decorative plate can be further improved, and the warpage of the decorative plate can be further suppressed. The kneaded paper containing the endothermic metal hydroxide has self-extinguishing property and can suppress the expansion of a flame.

Examples of the thermosetting resin include amino-formaldehyde resins, diaryl phthalate resins, unsaturated polyester resins, and mixed resins thereof. Among the thermosetting resins, amino-formaldehyde resins excellent in various physical properties such as heat resistance and strength are preferred. The amino-formaldehyde resin can be obtained by condensation of an amino compound such as melamine, urea, acetoguanamine, benzoguanamine and formaldehyde.

The intermediate layer can be produced, for example, by impregnating and drying a resin solution containing a thermosetting resin as a main component in a kneaded paper containing an endothermic metal hydroxide. The impregnation rate when impregnating and drying the resin liquid containing the thermosetting resin as a main component is preferably in the range of 5 to 150%. This impregnation rate is a value defined by the above equation (1). In this case, "weight before impregnation" in Equation 1 means the weight of the blend paper containing the endothermic metal hydroxide, and "weight after impregnation" impregnates the resin solution in the blend paper containing the endothermic metal hydroxide. And the weight after drying.

(3) A cremation layer

The cosmetic layer contains toilet paper and a thermosetting resin. As a toilet paper, the 30-140 g / m <2> toilet paper for thermosetting resin decorative boards can be used, for example.

As the thermosetting resin, for example, an amino-formaldehyde resin, a diaryl phthalate resin, an unsaturated polyester resin or a mixed resin thereof can be used. Among the resins, amino-formaldehyde resins excellent in heat resistance, abrasion resistance, and the like are preferred, and melamine-formaldehyde resins excellent in water resistance, heat resistance, abrasion resistance, chemical resistance, and stain resistance are particularly preferable.

The cosmetic layer can be produced by, for example, impregnating a resin liquid containing a thermosetting resin as a main component in a toilet paper and drying it. It is preferable that the impregnation rate when the resin liquid is impregnated into toilet paper and dried is in the range of 30 to 300%. In this case, "weight before impregnation" in Equation 1 means the weight of the toilet paper, and "weight after impregnation" means the value after impregnating the resin liquid and drying.

(4) other

The decorative plate of the present invention can be produced by, for example, thermoforming the respective layers including the core layer, the intermediate layer, and the cosmetic layer with a press such as a flat plate press or a continuous press.

The lamination order in a makeup plate can be made into the order of a core layer, an intermediate | middle layer, and a makeup layer, for example. The core layer and the intermediate layer may directly contact each other, and another layer may exist between them. Moreover, the intermediate | middle layer and a makeup layer may directly contact, and another layer may exist between them.

The makeup plate may have a makeup layer on one side, or may have a makeup layer on both sides. When having a makeup layer on one side of a makeup board, it is preferable that a makeup board is equipped with a balance layer. In this case, the decorative plate may include an intermediate layer and a cosmetic layer on one side of the core layer, and a balance layer on the opposite side of the core layer. When the balance layer is provided, warpage or damage of the decorative plate can be further suppressed.

The balance layer can be produced by, for example, impregnating and drying the resin liquid in paper. In this case, the balance layer will contain paper and the resin contained therein. As resin contained in resin solution, a melamine resin, urea resin, guanamine resin, a diaryl phthalate resin, an unsaturated polyester resin, an acrylic resin, or these mixed resin etc. are mentioned, for example.

As paper for a balance layer, the surface paper for makeup plates whose basis weight is 18-40 g / m <2> is mentioned, for example.

It is preferable that the impregnation rate when the resin liquid is impregnated into the paper for the balance layer and dried is in the range of 260 to 320%. This impregnation rate is a value defined by the above equation (1). In this case, "weight before impregnation" in Equation 1 means the weight of the paper for the balance layer, "weight after impregnation" means the weight after impregnating the resin liquid and drying.

Example  One

(1) slurry production

The slurry was prepared by mixing the following components. In addition, the numerical value of a weight part is solid content conversion value.

Acrylic resin emulsion (product number RAX-208, manufactured by Aika Industries, Ltd.): 32 parts by weight

Aluminum hydroxide: 300 parts by weight

3-glycidoxypropyl trimethoxysilane: 3.5 parts by weight

Phosphorus and nitrogen flame retardant: 18 parts by weight

Water: 170 parts by weight

On the other hand, acrylic resin emulsion is an example of a thermoplastic resin. The glass transition temperature (Tg) of the acrylic resin emulsion is 60 degrees. An acrylic resin emulsion has 2-ethylhexyl acrylate and methyl methacrylate as a main monomer. The average particle diameter of the acrylic resin emulsion is 200 nm. Acrylic resin emulsions function as binders.

Aluminum hydroxide is an example of an endothermic metal hydroxide. The average particle diameter of aluminum hydroxide is 8 micrometers. 3-glycidoxy propyl trimethoxysilane is an example of a silane coupling agent. The phosphorus content in the phosphorus-nitrogen flame retardant is 16% and the nitrogen content is 22%.

Table 1 shows the composition of the slurry in Example 1 and other examples and comparative examples described later.

Slurry Composition of Core Layer [Parts by Weight] Acrylic resin emulsion Hydroxide
aluminum Calcium carbonate Silane
Coupling agent Flame retardant Total solids Example 1 32 300 0 3.5 18 353.5 Example 2 32 300 0 3.5 18 353.5 Example 3 32 300 0 3.5 18 353.5 Example 4 32 300 0 3.5 18 353.5 Example 5 32 300 0 3.5 18 353.5 Example 6 58 300 0 3.5 18 379.5 Example 7 17 300 0 3.5 18 338.5 Example 8 32 300 0 18 18 368 Example 9 32 300 0 1.8 18 351.8 Example 10 32 600 0 3.5 18 653.5 Example 11 32 100 100 3.5 18 253.5 Example 12 32 300 0 3.5 35 370.5 Example 13 32 300 0 3.5 3.5 339 Example 14 32 300 0 3.5 18 353.5 Example 15 32 300 0 3.5 18 353.5 Example 16 32 300 0 3.5 18 353.5 Example 17 32 300 0 3.5 18 353.5 Example 18 32 300 0 3.5 18 353.5 Example 19 58 300 0 3.5 18 379.5 Example 20 17 300 0 3.5 18 338.5 Example 21 32 300 0 18 18 368 Example 22 32 300 0 1.8 18 351.8 Example 23 32 600 0 3.5 18 653.5 Example 24 32 100 100 3.5 18 253.5 Example 25 32 300 0 3.5 35 370.5 Example 26 32 300 0 3.5 3.5 339 Example 27 32 300 0 3.5 18 353.5 Example 28 32 300 0 3.5 18 353.5 Example 29 32 300 0 3.5 18 353.5 Example 30 32 300 0 3.5 18 353.5 Example 31 32 300 0 3.5 18 353.5 Example 32 32 300 0 3.5 18 353.5 Example 33 32 300 0 3.5 18 353.5 Example 34 32 300 0 3.5 18 353.5 Example 35 32 300 0 - 18 350 Example 36 32 300 0 - 18 350 Example 37 32 300 0 3.5 - 335.5 Example 38 32 300 0 3.5 - 335.5 Example 39 32 300 0 3.5 18 353.5 Example 40 32 300 0 3.5 18 353.5 Example 41 32 300 0 3.5 18 353.5 Comparative Example 1 32 300 0 3.5 18 353.5 Comparative Example 2 7 250 0 3.5 18 278.5 Comparative Example 3 76 250 0 3.5 18 347.5 Comparative Example 4 32 300 0 3.5 18 353.5 Comparative Example 5 32 300 0 3.5 18 353.5

(2) Preparation of Prepreg

A 40 g / m 2 glass fiber nonwoven fabric was prepared as a fibrous substrate. The fibrous base material was impregnated and dried to impregnate the slurry prepared in the above (1) so that the impregnation rate defined in the above formula (1) was 750% to prepare a prepreg. This prepreg comprises a fibrous substrate, an acrylic resin emulsion and aluminum hydroxide.

The amount (weight per unit area) of the acrylic resin emulsion, aluminum hydroxide, silane coupling agent, and flame retardant contained in one prepreg was 27.16 g / m 2, 254.60 g / m 2, 2.97 g / m 2, and 15.28 g / m 2, respectively.

Table 2 shows the compositions of the prepregs in Example 1 and other examples and comparative examples described later.

Content of each component [g / ㎡] Acrylic resin
emulsion Hydroxide
aluminum Calcium carbonate Silane
Coupling agent Flame retardant Example 1 27.16 254.60 0 2.97 15.28 Example 2 27.16 254.60 0 2.97 15.28 Example 3 27.16 254.60 0 2.97 15.28 Example 4 27.16 254.60 0 2.97 15.28 Example 5 27.16 254.60 0 2.97 15.28 Example 6 45.85 237.15 0 2.77 14.23 Example 7 15.07 265.88 0 3.10 15.95 Example 8 26.09 244.57 0 14.67 14.67 Example 9 27.29 255.83 0 1.53 15.35 Example 10 14.69 275.44 0 1.61 8.26 Example 11 37.87 118.34 118.34 4.14 21.30 Example 12 25.91 242.91 0 2.83 28.34 Example 13 28.32 265.49 0 3.10 3.10 Example 14 27.16 254.60 0 2.97 15.28 Example 15 27.16 254.60 0 2.97 15.28 Example 16 27.16 254.60 0 2.97 15.28 Example 17 27.16 254.60 0 2.97 15.28 Example 18 27.16 254.60 0 2.97 15.28 Example 19 45.85 237.15 0 2.77 14.23 Example 20 15.07 265.88 0 3.10 15.95 Example 21 26.09 244.57 0 14.67 14.67 Example 22 27.29 255.83 0 1.53 15.35 Example 23 14.69 275.44 0 1.61 8.26 Example 24 37.87 118.34 118.34 4.14 21.30 Example 25 25.91 242.91 0 2.83 28.34 Example 26 28.32 265.49 0 3.10 3.10 Example 27 27.16 254.60 0 2.97 15.28 Example 28 27.16 254.60 0 2.97 15.28 Example 29 27.16 254.60 0 2.97 15.28 Example 30 27.16 254.60 0 2.97 15.28 Example 31 27.16 254.60 0 2.97 15.28 Example 32 27.16 254.60 0 2.97 15.28 Example 33 27.16 254.60 0 2.97 15.28 Example 34 27.16 254.60 0 2.97 15.28 Example 35 27.43 257.14 0 - 15.43 Example 36 27.43 257.14 0 - 15.43 Example 37 28.61 268.26 0 3.13 - Example 38 28.61 268.26 0 3.13 - Example 39 27.16 254.60 0 2.97 15.28 Example 40 27.16 254.60 0 2.97 15.28 Example 41 27.16 254.60 0 2.97 15.28 Comparative Example 1 27.16 254.60 0 2.97 15.28 Comparative Example 2 7.54 269.30 0 3.77 19.39 Comparative Example 3 65.61 215.83 0 3.02 15.54 Comparative Example 4 27.16 254.60 0 2.97 15.28 Comparative Example 5 27.16 254.60 0 2.97 15.28

The numerical value in Table 2 is the weight of each component contained in a 1 m <2> prepreg.

(2) Preparation of Interlayer

An aluminum hydroxide blend paper (trade name: Sunwall, Sanzen Paper Co., Ltd., 69% by weight of aluminum hydroxide) was prepared as a blend paper. This blend paper is an example of a blend paper containing an endothermic metal hydroxide.

The mixed paper was impregnated with a resin solution containing a melamine-formaldehyde resin as a main component so as to have an impregnation rate of 30%, and dried to prepare an intermediate layer. This interlayer comprises a blended paper comprising aluminum hydroxide and melamine-formaldehyde resin contained in the blended paper. On the other hand, melamine-formaldehyde resin is an example of a thermosetting resin. The amount of melamine-formaldehyde resin contained in the intermediate layer is 33 g / m 2.

Table 3 shows the content of the intermediate layer in Example 1 and other examples and comparative examples described later.

Mezzanine materials Basis weight (g / m ² ) Impregnation rate (%) Impregnation amount (g / m ² ) Example 1 Al Hornchoji 110 30 33 Example 2 Al Hornchoji 180 30 54 Example 3 Al Hornchoji 80 30 24 Example 4 Al Hornchoji 110 100 110 Example 5 Al Hornchoji 110 10 11 Example 6 Al Hornchoji 110 30 33 Example 7 Al Hornchoji 110 30 33 Example 8 Al Hornchoji 110 30 33 Example 9 Al Hornchoji 110 30 33 Example 10 Al Hornchoji 110 30 33 Example 11 Al Hornchoji 110 30 33 Example 12 Al Hornchoji 110 30 33 Example 13 Al Hornchoji 110 30 33 Example 14 Al Hornchoji 110 30 33 Example 15 Al Hornchoji 180 30 54 Example 16 Al Hornchoji 80 30 24 Example 17 Al Hornchoji 110 100 110 Example 18 Al Hornchoji 110 10 11 Example 19 Al Hornchoji 110 30 33 Example 20 Al Hornchoji 110 30 33 Example 21 Al Hornchoji 110 30 33 Example 22 Al Hornchoji 110 30 33 Example 23 Al Hornchoji 110 30 33 Example 24 Al Hornchoji 110 30 33 Example 25 Al Hornchoji 110 30 33 Example 26 Al Hornchoji 110 30 33 Example 27 Al Hornchoji 110 30 33 Example 28 Al Hornchoji 110 30 33 Example 29 Al Hornchoji 110 30 33 Example 30 Al Hornchoji 110 30 33 Example 31 Al Hornchoji 110 30 33 Example 32 Al Hornchoji 110 30 33 Example 33 Al Hornchoji 110 30 33 Example 34 Al Hornchoji 110 30 33 Example 35 Al Hornchoji 110 30 33 Example 36 Al Hornchoji 110 30 33 Example 37 Al Hornchoji 110 30 33 Example 38 Al Hornchoji 110 30 33 Example 39 Al Hornchoji 110 30 33 Example 40 Al Hornchoji 110 30 33 Example 41 Al Hornchoji 110 30 33 Comparative Example 1 Al Hornchoji - - - Comparative Example 2 Al Hornchoji 110 30 33 Comparative Example 3 Al Hornchoji 110 30 33 Comparative Example 4 KP Paper 190 50 95 Comparative Example 5 KP Paper 110 30 33
"Aluminum kneaded paper" in Table 3 means aluminum hydroxide kneaded paper, and "KP paper" means kraft pulp paper. "Basic weight" in Table 3 means basis weight of aluminum hydroxide blend paper. The "impregnation rate" in Table 3 means the impregnation rate at the time of impregnating the resin liquid in the mixed paper. The "impregnation amount" in Table 3 means the resin adhesion amount (solid content conversion) per 1m <2> in aluminum hydroxide blend paper or kraft pulp paper.

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(3) Preparation of cosmetic layer

A cosmetic layer was prepared by impregnating a resin solution containing a melamine-formaldehyde resin as a main component in a toilet paper for white thermosetting resin decorative plates having a basis weight of 100 g / m 2 so as to have an impregnation rate of 130%. This cosmetic layer contains toilet paper and the melamine-formaldehyde resin contained in this toilet paper. On the other hand, melamine-formaldehyde resin is an example of a thermosetting resin. The amount of melamine-formaldehyde resin contained in the cosmetic layer is 130 g / m 2.

(4) Preparation of the decorative plate

Two prepregs, one intermediate layer, and one makeup layer were sequentially laminated from the bottom, and thermostatically molded on a condition of 132 degrees, 70 kgf / cm 2, and 64 minutes using a flat plate to obtain a decorative plate. At this time, the two prepregs form a core layer.

As illustrated in FIG. 1, the decorative plate 7 manufactured as described above is a laminate in which a core layer 4, an intermediate layer 2, and a cosmetic layer 1 made of two prepregs 3 are laminated. It is a sieve.

Table 4 shows the structure of the decorative plate in Example 1 and other examples and comparative examples described later.

Material of board A cremation layer Mezzanine Core layer Balance layer Example 1 has exist has exist has exist - Example 2 has exist has exist has exist - Example 3 has exist has exist has exist - Example 4 has exist has exist has exist - Example 5 has exist has exist has exist - Example 6 has exist has exist has exist - Example 7 has exist has exist has exist - Example 8 has exist has exist has exist - Example 9 has exist has exist has exist - Example 10 has exist has exist has exist - Example 11 has exist has exist has exist - Example 12 has exist has exist has exist - Example 13 has exist has exist has exist - Example 14 has exist has exist has exist has exist Example 15 has exist has exist has exist has exist Example 16 has exist has exist has exist has exist Example 17 has exist has exist has exist has exist Example 18 has exist has exist has exist has exist Example 19 has exist has exist has exist has exist Example 20 has exist has exist has exist has exist Example 21 has exist has exist has exist has exist Example 22 has exist has exist has exist has exist Example 23 has exist has exist has exist has exist Example 24 has exist has exist has exist has exist Example 25 has exist has exist has exist has exist Example 26 has exist has exist has exist has exist Example 27 has exist has exist has exist - Example 28 has exist has exist has exist has exist Example 29 has exist has exist has exist - Example 30 has exist has exist has exist has exist Example 31 has exist has exist has exist - Example 32 has exist has exist has exist has exist Example 33 has exist has exist has exist - Example 34 has exist has exist has exist has exist Example 35 has exist has exist has exist - Example 36 has exist has exist has exist has exist Example 37 has exist has exist has exist - Example 38 has exist has exist has exist has exist Example 39 has exist has exist has exist - Example 40 has exist has exist has exist - Example 41 has exist has exist has exist - Comparative Example 1 has exist - has exist - Comparative Example 2 has exist has exist has exist - Comparative Example 3 has exist has exist has exist - Comparative Example 4 has exist has exist has exist - Comparative Example 5 has exist has exist has exist -

On the other hand, since the core layer in each Example and a comparative example consists of two prepregs, each component contains twice the content shown in Table 2.

Example  2

A cosmetic plate was produced in the same manner as in Example 1 except that an aluminum hydroxide blend paper having a basis weight of 180 g / m 2 (trade name: Sunwall, Sanzen Paper Co., Ltd., aluminum hydroxide blend ratio of 69% by weight) was used as the intermediate layer manufacturing process. It was.

Example  3

A cosmetic plate was produced in the same manner as in Example 1, except that 80 g / m 2 of aluminum hydroxide blend paper (Awa Paper Co., Ltd., aluminum hydroxide blend ratio of 69% by weight) was used in the intermediate layer manufacturing step.

Example  4

A cosmetic plate was produced in the same manner as in Example 1 except that the impregnation rate when the resin solution was impregnated into the aluminum hydroxide kneaded paper was 100% in the intermediate layer manufacturing step.

Example  5

A cosmetic plate was produced in the same manner as in Example 1 except that the impregnation rate when the resin solution was impregnated with the aluminum hydroxide blend paper was adjusted to 10% in the intermediate layer manufacturing step.

Example  6

A decorative plate was produced in the same manner as in Example 1 except that the blending amount of the acrylic resin emulsion was 58 parts by weight in the slurry production step.

Example  7

A decorative plate was produced in the same manner as in Example 1 except that the blending amount of the acrylic resin emulsion was 17 parts by weight in the slurry production step.

Example  8

A decorative plate was produced in the same manner as in Example 1 except that the compounding amount of 3-glycidoxypropyl trimethoxysilane was 18 parts by weight in the slurry production step.

Example  9

A decorative plate was produced in the same manner as in Example 1 except that the blending amount of 3-glycidoxypropyl trimethoxysilane was 1.8 parts by weight in the slurry production step.

Example  10

A decorative plate was produced in the same manner as in Example 1 except that the compounding amount of aluminum hydroxide was 600 parts by weight in the slurry production step.

Example  11

The compounding quantity of aluminum hydroxide was 100 weight part in the slurry manufacturing process. Moreover, 100 weight part of heavy calcium carbonates of 1 micrometer of average particle diameters were added to the slurry. A cosmetic plate was produced in the same manner as in Example 1 except this.

Example  12

In the slurry manufacturing process, the cosmetic plate was produced like Example 1 except having made the compounding quantity of the phosphorus and nitrogen flame retardant into 35 weight part.

Example  13

In the slurry manufacturing process, the decorative plate was produced like Example 1 except having made the compounding quantity of the phosphorus and nitrogen flame retardant into 3.5 weight part.

Example  14

(1) Preparation of Balanced Layer

A balance layer was prepared by impregnating and drying a resin solution containing a melamine-formaldehyde resin as a main component on a surface paper for a cosmetic plate having a basis weight of 24 g / m 2 so as to have an impregnation rate of 280%. This balance layer contains surface paper and the melamine resin contained in the surface paper. The amount of melamine-formaldehyde resin contained in the balance layer is 67.2 g / m 2.

(2) manufacture of decorative board

One balance layer, two prepregs, one intermediate layer, and one makeup layer prepared in (1) were sequentially stacked from the bottom, and a flat treatment plate was used for 132 degrees, 70 kgf / cm2, for 64 minutes. It was integrated under thermoforming under the conditions to obtain a decorative plate. In addition, the prepreg, the intermediate | middle layer, and the makeup layer which were used in this Example are the same as that of the said Example 1.

As shown in FIG. 2, the decorative plate 8 manufactured as described above has a core layer 4 composed of a balance layer 5 and two prepregs 3, an intermediate layer 2, and a makeup layer. It is a laminated body which laminated | stacked (1). The makeup plate 8 includes an intermediate layer 2 and a makeup layer 1 on one side (upper side in FIG. 2) of the core layer 4, and the opposite side of the core layer 4 (lower side in FIG. 2). ) Is provided with a balance layer 5.

Example  15

A decorative plate was produced in the same manner as in Example 14 except that the intermediate layer was the same as in Example 2.

Example  16

A decorative plate was prepared in the same manner as in Example 14 except that the intermediate layer was the same as in Example 3.

Example  17

A decorative plate was produced in the same manner as in Example 14 except that the intermediate layer was the same as in Example 4.

Example  18

A decorative plate was produced in the same manner as in Example 14 except that the intermediate layer was the same as in Example 5.

Example  19

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 6.

Example  20

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 7.

Example  21

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 8.

Example  22

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 9.

Example  23

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 10.

Example  24

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 11.

Example  25

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 12.

Example  26

A decorative plate was produced in the same manner as in Example 14 except that the prepreg was the same as in Example 13.

Example  27

In the slurry manufacturing process, the makeup plate was produced like Example 1 except having mix | blended the same amount of 3- (2-aminoethyl) aminopropyl trimethoxysilane instead of 3-glycidoxy propyl trimethoxysilane. .

Example  28

In the slurry production process, a makeup plate was prepared in the same manner as in Example 14 except that the same amount of 3- (2-aminoethyl) aminopropyl trimethoxysilane was added instead of 3-glycidoxypropyl trimethoxysilane. .

Example  29

In the slurry manufacturing process, the same amount of nitrogen-based flame retardant (trade name Affinone-901, main component melamine sulfate, 48% total nitrogen, 9% total sulfur, and Sanwa Chemical Co., Ltd.) was added instead of the phosphorus-nitrogen flame retardant. As in Example 1, a decorative plate was manufactured.

Example  30

The above-mentioned process was carried out except that the same amount of nitrogen-based flame retardant (brand name Affinone-901 main component melamine sulfate, 48% of total nitrogen, 9% of total sulfur, Sanwa Chemical Co., Ltd.) was added in place of the phosphorus-nitrogen-based flame retardant. A makeup plate was prepared in the same manner as in Example 14.

Example  31

In the slurry manufacturing process, the cosmetic plate was produced like Example 1 except having mix | blended the same amount of RAX-208E instead of RAX-208. RAX-208E is an acrylic resin emulsion from IKA INDUSTRIAL CO., LTD. The glass transition temperature (Tg) of RAX-208E is 0 degree. The main monomers of RAX-208E are 2-ethylhexyl acrylate and methyl methacrylate.

Example  32

In the slurry manufacturing process, the cosmetic plate was produced like Example 14 except having mix | blended the same amount of RAX-208E instead of RAX-208.

Example  33

In the slurry manufacturing process, the cosmetic plate was produced like Example 1 except having mix | blended the same amount of RAX-208D instead of RAX-208. RAX-208D is an acrylic resin emulsion from IKA INDUSTRIAL CO., LTD. The glass transition temperature (Tg) of RAX-208D is 30 degrees. The main monomers of RAX-208D are 2-ethylhexyl acrylate and methyl methacrylate.

Example  34

In the slurry manufacturing process, the cosmetic plate was produced like Example 14 except having mix | blended the same amount of RAX-208D instead of RAX-208.

Example  35

A makeup plate was produced in the same manner as in Example 1 except that 3-glycidoxypropyl trimethoxysilane was not blended in the slurry production process.

Example  36

A makeup plate was produced in the same manner as in Example 14 except that 3-glycidoxypropyl trimethoxysilane was not blended in the slurry production process.

Example  37

A cosmetic plate was manufactured in the same manner as in Example 1 except that the phosphorus-nitrogen-based flame retardant was not blended in the slurry manufacturing process.

Example  38

A decorative plate was produced in the same manner as in Example 14 except that the phosphorus-nitrogen-based flame retardant was not blended in the slurry manufacturing process.

Example  39

In the slurry manufacturing process, a decorative plate was produced in the same manner as in Example 1 except that the same amount of magnesium hydroxide was used instead of aluminum hydroxide.

Example  40

In the intermediate layer manufacturing process, a decorative plate was produced in the same manner as in Example 1 except that the aluminum hydroxide kneaded paper in which the kneaded ratio of aluminum hydroxide was 60% by weight was used.

Example  41

In the intermediate layer manufacturing process, a decorative plate was produced in the same manner as in Example 1 except that the aluminum hydroxide kneaded paper in which the kneaded ratio of aluminum hydroxide was 80% by weight was used.

( Comparative example  One)

A decorative plate was manufactured in the same manner as in Example 1 except that the intermediate layer was not provided.

( Comparative example  2)

In the slurry manufacturing process, the cosmetic plate was produced like Example 1 except having set the compounding quantity of the acrylic resin emulsion to 7 weight part, and the compounding quantity of aluminum hydroxide to 250 weight part.

( Comparative example  3)

A decorative plate was produced in the same manner as in Example 1 except that the blending amount of the acrylic resin emulsion in the slurry manufacturing process was 76 parts by weight.

( Comparative example  4)

A decorative plate was produced in the same manner as in Example 1 except that a phenol resin-impregnated kraft paper having a 50% impregnation rate was used instead of the intermediate layer. The phenol resin impregnated kraft paper having a 50% impregnation rate is impregnated with phenol resin and dried so that the impregnation rate specified in Equation 1 is 50% on 190 g / m 2 kraft paper.

( Comparative example  5)

A decorative plate was produced in the same manner as in Example 1 except that a phenol resin-impregnated kraft paper having an impregnation rate of 30% was used instead of the intermediate layer. The phenol resin impregnated kraft paper having an impregnation rate of 30% is impregnated with phenol resin and dried so that the impregnation rate specified in Equation 1 is 30% on 110 g / m 2 kraft paper.

< Vanity  Evaluation>

Evaluation tests for smoothness, incombustibility, bending workability, weight increase rate, and warping were performed on the decorative plates of the respective examples and the comparative examples. The evaluation test method is as follows.

(1) smoothness

The makeup plate was visually observed. When there was no crack and orange peel in a makeup layer, smoothness was made into "O", and if there was a slight orange peel, smoothness was made into "△."

Moreover, the light of a rod-shaped fluorescent lamp was projected on the makeup plates of Example 1 and Comparative Example 1, and the makeup plate was photographed in the state. The decorative plate photograph of Example 1 is shown in FIG. 3, and the decorative plate photograph of Comparative Example 1 is shown in FIG. Since the surface of the makeup plate of Example 1 had high smoothness, the shape of the fluorescent lamp was faithfully reflected. On the other hand, since the surface of the makeup plate of Comparative Example 1 had low smoothness, the shape of the fluorescent lamp was blurred.

(2) nonflammable

The exothermic test of the 20-minute test by the cone calorimeter based on ISO5660 was done. When all of the following alpha-gamma were satisfied, it evaluated by O and the other thing was evaluated by X.

(alpha): The total calorific value is 8 MJ / m <2> or less.

β: The maximum heat release rate does not exceed 200KW / m 2 continuously for 10 seconds or more.

γ: There are no cracks or holes penetrating to the back side for 20 minutes after the test is started.

(3) bending workability

A 150 mm wide sample was cut out of the makeup plate. The rod heater was then placed at a predetermined distance from the sample surface. At this time, the axial direction of the rod-shaped heater and the fiber direction of the decorative plate were made parallel. In this state, the heater temperature was 700 degrees and the surface temperature of the sample was 170 degrees.

Next, the sample supported so that the surface was horizontal was pressed firmly from the top to the top of the vertically placed plate-shaped jig. At this time, the fiber direction of the decorative plate and the longitudinal direction of the plate-shaped jig were made parallel. The cross-sectional shape of the top of the jig is an arc shape of a predetermined radius of curvature.

Next, while pressing the sample tightly to the jig as described above, both ends of the sample were further pushed down by a certain amount, and the sample was bent to confirm whether or not a crack occurred in the sample.

The test for bending the sample as described above was repeated while gradually decreasing the radius of curvature of the top of the jig. The minimum curvature radius which a crack does not produce in a sample was made into the evaluation value of bending workability.

(4) weight increase rate

The weight increase rate of the decorative plate was measured based on the corrosion resistance of JIS K 6902 'Thermosetting resin high pressure decorative plate test method'. In addition, the standard value is less than 17%.

(5) Evaluation of warpage

50 mm x 300 mm samples were cut out from the board. The fiber direction of the decorative plate is parallel to the short direction of this sample. This sample was hardened for 24 hours in 40 degreeC room temperature, and 30% of humidity. Then, the bending height in the horizontal plane (the distance between the opposite end of the sample and the horizontal plane when one end in the longitudinal direction of the sample was pressed in the horizontal plane) when the sample was placed on the horizontal plane was measured.

The evaluation results are shown in Table 5 and Table 6. In addition, "thickness" in Table 5 means the thickness of a decorative board.

Evaluation results Thickness [mm] Smoothness nonflammable Bending workability Weight increase rate (%) Example 1 0.63 ○ ○ 6R 10.4 Example 2 0.65 ○ ○ 6R 12.8 Example 3 0.62 ○ ○ 6R 10.3 Example 4 0.62 ○ ○ 6R 12.1 Example 5 0.61 ○ ○ 6R 14.6 Example 6 0.60 ○ ○ 6R 12.2 Example 7 0.61 ○ ○ 6R 16.5 Example 8 0.61 ○ ○ 6R 12.9 Example 9 0.63 ○ ○ 6R 13.5 Example 10 0.61 ○ ○ 6R 14.9 Example 11 0.60 ○ ○ 6R 12.2 Example 12 0.64 ○ ○ 6R 15.8 Example 13 0.65 ○ ○ 6R 10.2 Example 14 0.70 ○ ○ 9R 4.5 Example 15 0.72 ○ ○ 9R 8.7 Example 16 0.66 ○ ○ 9R 5.8 Example 17 0.66 ○ ○ 9R 7.9 Example 18 0.63 ○ ○ 9R 8.2 Example 19 0.64 ○ ○ 9R 6.3 Example 20 0.65 ○ ○ 9R 11.6 Example 21 0.64 ○ ○ 9R 5.2 Example 22 0.67 ○ ○ 9R 9.8 Example 23 0.64 ○ ○ 9R 9.6 Example 24 0.65 ○ ○ 9R 6.5 Example 25 0.67 ○ ○ 9R 15.5 Example 26 0.69 ○ ○ 9R 7.5 Example 27 0.67 ○ ○ 6R 10.5 Example 28 0.69 ○ ○ 9R 9.8 Example 29 0.68 ○ ○ 6R 12.5 Example 30 0.68 ○ ○ 9R 10.8 Example 31 0.66 ○ ○ 6R 10.4 Example 32 0.67 ○ ○ 9R 6.9 Example 33 0.65 ○ ○ 6R 10.3 Example 34 0.69 ○ ○ 9R 7.9 Example 35 0.66 ○ ○ 6R 14.5 Example 36 0.68 ○ ○ 9R 11.9 Example 37 0.67 ○ ○ 6R 12.6 Example 38 0.68 ○ ○ 9R 10.7 Example 39 0.62 ○ ○ 6R 14.4 Example 40 0.63 ○ ○ 6R 10.2 Example 41 0.65 ○ ○ 6R 13.9 Comparative Example 1 0.65 △ ○ 9R 8.5 Comparative Example 2 -(Not cosmetic) Comparative Example 3 0.69 ○ × 6R 7.1 Comparative Example 4 0.73 ○ × 9R 8.1 Comparative Example 5 0.63 ○ × 9R 11.8

Deflection [mm] Example 1 23 Example 14 12 Comparative Example 1 29 Comparative Example 5 50

The decorative plate of the Example was able to obtain favorable results in each evaluation item. In other words, the decorative plate of the embodiment is thin, hard to bend, has smoothness in appearance, and is excellent in bending workability and at the same time combines non-combustible performance. The decorative plate of the comparative example is inferior in the evaluation items of any of smoothness, bending workability, incombustibility and warpage.

1 makeup layer 2 intermediate layers
3 prepregs 4 core layer
5 balance layer 7, 8 board

Claims (13)

A core layer comprising a fibrous substrate, a thermoplastic resin, and an endothermic metal hydroxide;
An interlayer comprising a mixed paper comprising a heat absorbing metal hydroxide and a thermosetting resin,
A toilet layer comprising toilet paper and a thermosetting resin,
The amount of the thermoplastic resin contained in the core layer is 29.38 ~ 100g / ㎡ a decorative plate. The method of claim 1,
The makeup plate which is a laminated body laminated in order of the said core layer, the said intermediate | middle layer, and the said makeup layer. The method of claim 1,
A makeup plate, wherein said endothermic metal hydroxide in said core layer or said intermediate layer is aluminum hydroxide or magnesium hydroxide. The method of claim 1,
The makeup plate, wherein the thermoplastic resin in the core layer is an acrylic resin emulsion. The method of claim 1,
The core layer comprises a silane coupling agent. The method of claim 1,
The core layer is a decorative plate comprising a flame retardant. The method of claim 6,
The core layer is a decorative plate comprising 1 to 100g / ㎡ of the flame retardant. The method of claim 6,
The flame retardant is a nitrogen-based flame retardant or phosphorus, nitrogen based flame retardant. The method of claim 8,
The phosphorus content in the said phosphorus-nitrogen flame retardant is 1 to 30 weight%, and the nitrogen content in the said phosphorus-nitrogen flame retardant is 5 to 35 weight%. delete The method of claim 1,
The makeup plate wherein the blend paper contains 40 to 95% by weight of the endothermic metal hydroxide. The method of claim 1,
The makeup plate wherein the blend paper contains 55 to 85% by weight of the endothermic metal hydroxide. The method according to any one of claims 1 to 9, 11, 12,
The intermediate layer and the makeup layer are provided on one side of the core layer,
A decorative plate having a balance layer on the opposite side of the core layer.

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