JP2005336254A - Sheet-like nonflammable molded form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet-like nonflammable molded form having high nonflammability and both high flexural strength and peel strength. <P>SOLUTION: The sheet-like nonflammable molded form comprises 60-95 mass%, on a solid basis, of a hydrous inorganic compound (and a carbonate), 2-20 mass%, on a solid basis, of cellulose fiber, 1-20 mass%, on a solid basis, of inorganic fiber and 1-20 mass%, on a solid basis, of a phenolic resin. This molded form is a sheet-like hot-pressed molded form containing the phenolic resin with the solid mass ratio:resol resin/novolak resin of (30:70) to (75:25) at the core part as well. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sheet-like incombustible molded body, and more particularly, to a sheet-like incombustible molded body having high incombustibility and excellent mechanical strength.

  2. Description of the Related Art Conventionally, a base material containing a large amount of aluminum hydroxide powder has been used as a non-combustible building material that imparts non-combustibility to various building materials for fire prevention measures of buildings. The base material containing a large amount of the aluminum hydroxide powder is incombustible by dehydration endothermic reaction of aluminum hydroxide at 200 to 300 ° C.

However, a substrate containing a large amount of a water-containing inorganic compound such as aluminum hydroxide generally has a drawback that its strength is extremely weak. Several proposals have been made so far to solve such difficulties.
For example, in Patent Document 1, the amount of a synthetic polymer that can be contained due to the effect of improving the incombustibility by combining a hydrous inorganic compound and a carbonate in a specific blending ratio is increased, and the strength of the incombustible substrate is improved. This technique is disclosed. However, there is an even stronger demand for performance improvement in such fields, and a decrease in strength is inevitable if the amount of the synthetic polymer is reduced in order to ensure a higher degree of nonflammability.
In Patent Document 2, a water-containing inorganic compound or a water-containing inorganic compound and a carbonate are highly blended, and in addition to the non-combustible substrate containing cellulose fiber, inorganic fiber, and thermosetting resin, the location of the thermosetting resin is described. A technique is disclosed in which strength can be improved while maintaining nonflammability by incorporating a fixed amount in the surface layer portion of the nonflammable substrate. However, in the technique according to Patent Document 2, the thermosetting resin is not uniformly contained in the nonflammable substrate. That is, the surface layer portion contains a relatively large amount of thermosetting resin, but the core portion contains only a very small amount of thermosetting resin, so the strength of the thermosetting resin contained in the surface layer portion. Although the bending strength at which the manifestation effect works effectively can be made relatively strong, the strength manifestation effect due to the slight thermosetting resin in the core of the substrate becomes extremely insufficient, and the weakest part in the substrate The peel strength depending on the strength of the film becomes extremely weak.

JP-A-5-112659 JP-A-8-198980

  The present invention has been made in view of the above points, and provides a sheet-like incombustible molded article having high incombustibility and excellent bending strength and peel strength.

  The sheet-like incombustible molded article according to the present invention is a hydrous inorganic compound, or hydrous inorganic compound and carbonate 60 to 95% by mass (solid content), cellulose fiber 2 to 20% by mass (solid content), and inorganic fiber 1 to 20 mass. % (Solid content) and 1-20% by mass (solid content) of a phenol resin, and a sheet containing the phenol resin also in the core, which has a solid content mass ratio of resole resin / novolak resin of 30 / 70-75 / 25 It is a sheet-like non-combustible molded product characterized by being a hot-pressed molded product.

  The sheet-shaped incombustible molded article of the present invention is a phenolic resin comprising a water-containing inorganic compound or a water-containing inorganic compound and carbonate, cellulose fiber, inorganic fiber, resole resin / novolak resin in a solid content mass ratio of 30/70 to 75/25. Consists of constituent components, each component is contained in a specific amount, so that it has a high degree of nonflammability and excellent mechanical strength. That is, the sheet-like non-combustible molded article of the present invention maintains excellent performance in both bending strength and peel strength, and does not cause any harmful deformation in fire prevention such as cracks in the surface test of JIS A 1321: 1994. In addition, the amount of smoke generation is small, and it has high nonflammability that can pass the first grade of the surface test.

Examples of the water-containing inorganic compound include aluminum hydroxide, magnesium hydroxide, calcium hydroxide, dihydrate gypsum and calcium aluminate hydrate (xCaO.Al ₂ O ₃ .yH ₂ O; x = 1 to 4, y = 5-19) and the like. These compounds all have crystal water in the molecule and have a chemically similar structure. In addition, the hydrous inorganic compounds have some differences in decomposition temperature and endothermic amount depending on the type, but they are quite common in that they are decomposed during high temperature heating and exhibit a flame retardant effect by endothermic action. Therefore, basically any of the water-containing inorganic compounds described above may be used, but aluminum hydroxide is most suitable in consideration of economics such as an acquisition price.

  Examples of the carbonate used in the present invention include calcium carbonate, magnesium carbonate, barium carbonate, strontium carbonate, beryllium carbonate, and zinc carbonate. Although these carbonates have some differences in decomposition temperature and endothermic amount depending on their types, they are quite common in that they decompose upon high temperature heating and exhibit a flame retardant effect by endothermic action. Therefore, basically any of the carbonates described above may be used, but calcium carbonate is most suitable in consideration of economics such as an acquisition price. As another important effect of the carbonate blending, the smoke generation amount reducing effect pointed out by the present inventor in JP-A-5-112659 can be mentioned.

  The water-containing inorganic compound in the sheet-shaped incombustible molded article according to the present invention is 60 to 95% by mass in solid content, or the total content range of the water-containing inorganic compound and carbonate is 60 to 95% by mass in solid content. To do. Preferably it is 70-92 mass%, More preferably, it is 75-88 mass%. If the content is less than 60% by mass, sufficient incombustibility cannot be obtained. On the other hand, if it exceeds 95% by mass, it is unsuitable because sufficient paper-making properties or mechanical strength cannot be obtained due to an excessive amount of the water-containing inorganic compound or an excessive amount of the water-containing inorganic compound and carbonate. In addition, by making the water-containing inorganic compound in a sheet-like incombustible molding into the range of 70-92 mass% by solid content, or making the total content rate of a water-containing inorganic compound and carbonate into the range of 70-92 mass%. Sufficient nonflammability and papermaking properties or mechanical strength can be easily secured. By setting the amount in the range of 75 to 88% by mass, sufficient nonflammability and papermaking properties or mechanical strength can be easily secured.

Moreover, it is preferable that the content mass ratio of the water-containing inorganic compound / carbonate is on the excess side of the water-containing inorganic compound with respect to the solid content of 50/50. It becomes easy to ensure more sufficient nonflammability by making the content mass ratio of a water-containing inorganic compound / carbonate into a water content inorganic compound excess side rather than 50/50 by solid content.
As the above-mentioned cellulose fiber, one kind or two or more kinds selected from wood pulp such as softwood or hardwood chemical pulp, mechanical pulp, semi-chemical pulp, cotton pulp, hemp pulp, various types of waste paper, etc. May be used in combination. Wood pulp is the most easy-to-use cellulosic fiber material because of its stable supply and quality and relatively low price. Cotton pulp and hemp pulp are unstable in supply and expensive in price. However, in a sheet-like molded article containing a large amount of an endothermic decomposable compound as in the present invention, the cotton pulp and hemp pulp may be used as necessary. By using pulp or hemp pulp, the reduction in mechanical strength of the sheet-like molded product can be minimized.
The content range of the cellulose fiber in the sheet-like incombustible molded product according to the present invention is 2 to 20% by mass, preferably 3 to 18% by mass, and more preferably 4 to 15% by mass in terms of solid content. If the total content is less than 2% by mass, sufficient paper-making property cannot be obtained due to the shortage of cellulose fibers, and the mechanical strength becomes insufficient. On the other hand, if it exceeds 20% by mass, sufficient nonflammability cannot be obtained due to an excess of organic substances. In addition, it becomes easy to ensure sufficient paper-making property, mechanical strength, and nonflammability by making the content rate of the cellulose fiber in a sheet-like incombustible molding into the range of 3-18 mass% by solid content. By setting it in the range of mass%, it becomes easy to ensure sufficient papermaking properties, mechanical strength and nonflammability.

As the above-mentioned inorganic fiber, at least one kind selected from rock wool fiber, glass fiber, ceramic fiber or carbon fiber is used.
The content range of the inorganic fibers in the sheet-shaped incombustible molded article of the present invention is 1 to 20% by mass, preferably 1 to 17% by mass, and more preferably 2 to 15% by mass in terms of solid content. If the content is less than 1% by mass, sufficient nonflammability cannot be obtained, and if it exceeds 20% by mass, sufficient paper-making properties cannot be obtained. In addition, it becomes easy to ensure sufficient nonflammability and papermaking property by making the content rate of the inorganic fiber in a sheet-like incombustible compact into the range of 1-17 mass% by solid content, and the range of 2-15 mass% By doing so, it becomes easier to ensure sufficient non-flammability and papermaking.

In the phenol resin used in the present invention, the resol resin / novolak resin is 30/70 to 75/25, preferably 35/65 to 70/30, more preferably 40/60 to 65/35 in terms of solid content mass ratio. . When the resol resin is excessive from 75/25, the surface test of JIS A 1321: 1994 tends to cause harmful deformation such as cracks and cannot ensure sufficient non-flammability. On the other hand, when the resol resin is less than 30/70, the amount of smoke generation tends to be excessive in the surface test of JIS A 1321: 1994, and sufficient non-combustible performance cannot be secured, and the mechanical strength is also insufficient. . In addition, by making the solid content mass ratio of the resole resin / novolak resin in the range of 35/65 to 70/30, it is difficult to cause harmful deformations such as cracks in the surface test of JIS A 1321: 1994, and smoke generation It becomes difficult to make the amount excessive, and it becomes easy to ensure sufficient incombustibility and also to ensure sufficient mechanical strength. Moreover, by making the solid content mass ratio of the resole resin / novolak resin in the range of 40/60 to 65/35, further, it is difficult to cause harmful deformation on fire prevention such as cracks in the surface test of JIS A 1321: 1994, The amount of smoke generated is less likely to be excessive, and at the same time, it becomes easy to ensure sufficient nonflammability and it is easy to ensure sufficient mechanical strength.
The content range of the phenol resin in the sheet-shaped incombustible molded article of the present invention is 2 to 20% by mass, preferably 3 to 17% by mass, and more preferably 4 to 15% by mass in terms of solid content. If the content is less than 2% by mass, sufficient mechanical strength cannot be obtained, and if it exceeds 20% by mass, sufficient nonflammability cannot be obtained due to an excess of organic substances. In addition, it becomes easy to ensure sufficient mechanical strength and nonflammability by making the content rate of the phenol resin in a sheet-like incombustible molding into the range of 3-17 mass% by solid content, and 4-15 mass%. By setting it as a range, it becomes easy to ensure sufficient mechanical strength and nonflammability.

The sheet-shaped incombustible molded article according to the present invention is a water-containing inorganic compound or a water-containing inorganic compound and carbonate, cellulose fiber, inorganic fiber, and resole resin / novolak resin in a solid content mass ratio of 30/70 to Any phenol resin composed of 75/25 may be used, and the production method may be any method such as a wet papermaking method or a dry molding method, and is not limited to a specific production method. The papermaking method is most preferred. Hereinafter, the case where the wet papermaking method is applied will be described in detail with reference to the manufacturing method.
The sheet-like incombustible molded article according to the present invention may contain various yield improvers for improving the yield of the hydrous inorganic compound or carbonate, or, if necessary, a synthetic dye or pigment for coloring. In addition, it goes without saying that a dry or wet paper strength enhancer, a sizing agent, a water-resistant agent, a water repellant and the like should be included depending on the application in order to improve mechanical strength or post-processability.
As a method for incorporating the phenol resin into the sheet-like non-combustible molded article of the present invention, a liquid material, a fibrous material, or a granular material of the phenol resin is internally added to the raw material, or is applied or impregnated after forming the paper layer. do it. In particular, in order to make the quality uniform in the thickness direction, a method of internally adding a phenol resin liquid, fibrous or granular material to the raw slurry is most preferable.
As a method of adding a hydrated inorganic compound or carbonate, a method of applying or impregnating a coating material containing a hydrated inorganic compound or carbonate to a substrate is also conceivable, but a predetermined content is ensured or the thickness is increased. In order to make the quality uniform in the direction, the method of internally adding a hydrated inorganic compound or carbonate in the form of powder or slurry in the raw material slurry is most preferable.
In this case, the addition method and order of addition of the hydrated inorganic compound, carbonate, cellulose fiber, inorganic fiber, and phenol resin are arbitrary, and a beating treatment or the like may be performed as necessary.

In order to perform wet papermaking using the raw material slurry thus obtained, a normal papermaking method may be used. That is, the raw material slurry may be supplied onto a papermaking net such as a long net, a circular net or an inclined net, filtered and dehydrated, and then compressed and dried. If necessary, two or more sheet layers may be superposed by various combination nets, multi-circular nets, various laminators and the like.
As for the hot pressing, conventional hot pressing press molding, preheating-cold press molding, high frequency heating molding, or the like may be applied singly or in combination of two or more.
The sheet-like incombustible molded article of the present invention contains a water-containing inorganic compound and inorganic fiber, or exhibits excellent incombustibility only by containing a water-containing inorganic compound, carbonate and inorganic fiber. It does not prevent the use of. Examples of flame retardants that can be used in combination include known flame retardants such as organic phosphorus compounds, phosphorus-containing nitrogen-containing compounds, sulfamates such as guanidine sulfamate, inorganic phosphates, halogen-containing compounds, and antimony compounds. . In addition, examples of the method of using the flame retardant include a method in which it is internally added to the raw material slurry, or is applied or impregnated during the paper making process, after paper making, or after hot pressing. In general, however, flame retardants have disadvantages such as the generation of harmful gases when heated at high temperatures, and therefore flame retardants should preferably not be used. When using a flame retardant, it is natural that the content of the flame retardant should be minimized considering the content of water-containing inorganic compound and rock wool fiber or the content of water-containing inorganic compound, carbonate and rock wool fiber. It is.
Furthermore, depending on the application, the obtained sheet-like incombustible molded body may be subjected to surface treatment such as spraying, application or printing of various paints, decorative paper, leather, synthetic resin film, veneer, metal plate or metal foil, etc. Needless to say, it is possible to further increase the added value of the sheet-like incombustible molded article by adhering the face materials together and fixing them.

The important point of the present invention is that by using a phenol resin having a specific resin composition, it contains a large amount of a water-containing inorganic compound or a water-containing inorganic compound and a carbonate, and additionally contains a predetermined amount of cellulose fibers and inorganic fibers. Furthermore, the sheet-like hot-pressed molded body containing a predetermined amount of the phenolic resin maintains excellent performance in both bending strength and peel strength, and in the surface test of JIS A 1321: 1994, fire prevention such as cracks In addition, no harmful deformation occurs, the amount of smoke generation is small, and it has high incombustibility that can pass the first grade of the surface test.
The phenol resin can exhibit mechanical strength with a relatively small amount of blend, and the phenol resin itself is relatively excellent in heat resistance, so that it can be said that it is suitable for a material that requires a high degree of nonflammability. However, even a phenol resin is an organic substance, so even if it is blended in a small amount, a certain degree of deterioration of nonflammability is inevitable. In order to obtain excellent mechanical strength, it is necessary to blend a certain amount of phenol resin.
Therefore, it has been extremely difficult to achieve both excellent mechanical strength and high incombustibility, in particular, excellent performance in both bending strength and peel strength, and to ensure high incombustibility.
In view of this, the present inventor, in a sheet-shaped molded article containing a large amount of a water-containing inorganic compound or a water-containing inorganic compound, a carbonate, and a relatively small amount of a phenol resin, originally has a contradictory relationship but has excellent mechanical strength and high In order to achieve both nonflammability, many experiments were conducted, and it was found that this purpose can be achieved by using a phenol resin having a specific resin composition. That is, a phenol resin comprising a resole resin / novolak resin having a solid content mass ratio of 30/70 to 75/25 has both excellent mechanical strength and high incombustibility, and particularly excellent in both bending strength and peel strength. It has been found that it is suitable for the purpose of maintaining high performance and ensuring high incombustibility.

Next, a description will be given based on experimental results in examples described later.
The sheet-like molded bodies according to Example 1, Example 2, Example 3, Comparative Example 1 and Comparative Example 2 described later have almost the same composition. The solid resin mass ratio of the resole resin / novolak resin of the phenol resin used was 65/35 in Example 1, 55/45 in Example 2, 45/55 in Example 3, and 20/80 in Comparative Example 1. Comparative Example 2 is 80/20. The bending strength is excellent at 14.3 to 16.2 MPa in Examples 1, 2, and 3, whereas it is 16.4 MPa in Comparative Example 2, which is equivalent to Examples 1, 2, and 3. In Comparative Example 1, it is 10.1 MPa, which is about 30 to 40% lower than Examples 1, 2, and 3. The peel strength (split bond strength) is 7950 to 10200 N / m in Examples 1, 2, and 3 and excellent, whereas Comparative Example 2 is 10500 N / m, which is equivalent to Examples 1, 2, and 3. However, in Comparative Example 1, it is 5000 N / m, which is about 40 to 50% lower than Examples 1, 2, and 3. Next, regarding nonflammability, cracks did not occur in the surface test of JIS A 1321: 1994 in Examples 1, 2, and 3, whereas cracks did not occur in Comparative Example 1, but in Comparative Example 2, cracks did not occur. Occurred. On the other hand, when the smoke generation coefficient of the surface test of JIS A 1321: 1994 is seen, it is 15.4 to 23.4 in Examples 1, 2, and 3 and the amount of smoke generation is small, whereas in Comparative Example 2, it is 17.8. Yes, equivalent to Examples 1, 2, and 3, but in Comparative Example 1, it is 42.6, and the smoke generation amount is about 2-3 times larger than Examples 1, 2, and 3.
That is, in a sheet-like molded article containing a large amount of a water-containing inorganic compound or a water-containing inorganic compound, a carbonate and a relatively small amount of a phenol resin, the resin composition of the phenol resin to be used is represented by a solid mass ratio of resole resin / novolak resin. Only by specifying to be in the range of 30/70 to 75/25, excellent mechanical strength (bending strength and peel strength) and high nonflammability that can pass the first class of surface test of JIS A 1321: 1994 Can be obtained.

Example:
Next, the present invention will be described more specifically based on the following examples.
Measurement of each item in this example was performed by the following method.
(1) Thickness and density: According to JIS P 8118: 1998.
(2) Bending strength: According to JIS A 5905: 1994. When there was fiber orientation, it measured about the fiber orientation direction and the direction which makes a right angle to this, and calculated | required the average of both.
(3) Peel strength: According to the split adhesion strength test of JIS K 6853: 1994. When there was fiber orientation, it measured about the fiber orientation direction and the direction which makes a right angle to this, and calculated | required the average of both.
(4) Nonflammability 1: JIS A 1321: 1994 surface test, evaluated by presence or absence of harmful deformation in the fire prevention such as cracks.
(5) Nonflammability 2: Evaluated by the smoke emission coefficient of JIS A 1321: 1994.
(6) Nonflammability 3: Evaluated based on first grade pass / fail of the surface test of JIS A 1321: 1994.

Commercially available softwood unbleached sulfate pulp and 3 mm rock wool fiber (hereinafter referred to as inorganic fiber a)
Abbreviated. ) Is taken out with a disaggregator, and a predetermined amount of a mixed dispersion of cellulose fibers and inorganic fibers is taken, and aluminum hydroxide powder (average particle size is 5.7 μm; the same applies hereinafter), calcium carbonate powder And a phenolic resin (hereinafter abbreviated as phenolic resin a) in which the resole resin / novolak resin is 65/35 in terms of solid content weight ratio are added, and a stirrer is added. After sufficiently dispersing and mixing, the sheet is formed with a square test paper machine, pressed and dried, and then heat-treated with a hot press (temperature 175 ° C., pressure 2.0 MPa, time 3 minutes) to form a sheet-like molded product A was obtained.
About the sheet-like molded object A, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

In Example 1, in place of the phenol resin a, a phenol resin (hereinafter abbreviated as a phenol resin b) in which the resole resin / novolak resin is 55/45 in terms of solid content is used. Similarly, a sheet-like molded body B was obtained.
About the sheet-like molded object B, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

In Example 1, instead of the phenol resin a, a phenol resin having a resole resin / novolak resin having a solid content weight ratio of 45/55 (hereinafter abbreviated as a phenol resin c) was used. Similarly, a sheet-like molded product C was obtained.
About the sheet-like molded object C, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

In Example 2, a sheet-like molded body D was obtained in the same manner as in Example 2 except that the amount of each component was changed.
About the sheet-like molded object D, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

In Example 2, a sheet-like molded body E was obtained in the same manner as in Example 2 except that the calcium carbonate powder was not blended.
For the sheet-like molded product E, the content of each component is shown in Table 1, and the thickness, density, bending strength, peel strength, nonflammability 1, nonflammability 2 and nonflammability 3 are measured, and the results are shown in Table 1. It was shown in 1.

In Example 2, instead of the inorganic fiber a, glass fiber having a fiber length of 3 mm (hereinafter referred to as inorganic fiber b)
Abbreviated. ) Was used in the same manner as in Example 2 to obtain a sheet-like molded product F.
About the sheet-like molded object F, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

In Example 2, instead of the aluminum hydroxide powder, a sheet-like molded product G was prepared in the same manner as in Example 2 except that magnesium hydroxide powder (average particle size: 10 μm; hereinafter the same) was used. Obtained.
About the sheet-like molded object G, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

In Example 1, the sheet-like molded object H was obtained like Example 1 except having changed the compounding quantity of each component and having set the pressure of a hot press process to 3.0 MPa.
About the sheet-like molded object H, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

In Example 2, the sheet-like molded object I was obtained like Example 2 except having changed the compounding quantity of each component.
About the sheet-like molded object H, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

Commercially available softwood unbleached sulfate pulp and inorganic fiber a are disaggregated with a pulper, to which aluminum hydroxide powder, calcium carbonate powder and phenol resin a are added, and after thoroughly dispersing and mixing, a long net / wine 20 sheet layers were laminated with a roll-up paperboard paper machine with a roll-up roll, pressed, dried, and then heat-treated with a hot press (temperature 175 ° C., pressure 2.0 MPa, time 3 minutes), A sheet-like molded product J was obtained.
For the sheet-like molded product J, the content of each component is shown in Table 1, and the thickness, density, bending strength, peel strength, nonflammability 1, nonflammability 2 and nonflammability 3 are measured, and the results are shown. It was shown in 1.

In Example 10, a sheet-like molded body K was obtained in the same manner as in Example 10 except that the phenol resin b was used instead of the phenol resin a and the blending amounts of the respective components were changed.
About the sheet-like molded object K, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

Comparative Example 1
In Example 1, in place of the phenol resin a, a phenol resin (hereinafter, abbreviated as a phenol resin d) in which the resole resin / novolak resin is 20/80 in terms of solid content is used. Similarly, a sheet-like molded body L was obtained.
About the sheet-like molded object L, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

Comparative Example 2
In Example 1, instead of the phenol resin a, a phenol resin (hereinafter, abbreviated as a phenol resin e) in which the resole resin / novolak resin is 80/20 in terms of solid content is used. Similarly, a sheet-like molded body M was obtained.
About the sheet-like molded object M, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

Comparative Example 3
In Example 10, instead of the phenol resin a, a sheet-like molded body N was obtained in the same manner as in Example 10 except that the phenol resin d was used.
For the sheet-like molded body N, the content of each component is shown in Table 1, and the thickness, density, bending strength, peel strength, nonflammability 1, nonflammability 2 and nonflammability 3 are measured, and the results are shown. It was shown in 1.

Comparative Example 4
In Example 10, a sheet-like molded body O was obtained in the same manner as in Example 10 except that the phenol resin e was used instead of the phenol resin a.
About the sheet-like molded object O, while showing the content rate of each component in Table 1, thickness, a density, bending strength, peeling strength, nonflammability 1, nonflammability 2, and nonflammability 3 were measured, respectively, and the result was represented. It was shown in 1.

Claims (5)

Water-containing inorganic compound, or water-containing inorganic compound and carbonate 60 to 95% by mass (solid content), cellulose fiber 2 to 20% by mass (solid content), inorganic fiber 1 to 20% by mass (solid content) and phenol resin 1 to 20 It is a sheet-like hot-pressed molded body comprising the phenol resin, which is composed of mass% (solid content) and has a solid content mass ratio of resole resin / novolak resin of 30/70 to 75/25 in the core portion. Sheet-shaped incombustible molded product. The sheet-like incombustible molded article according to claim 1, wherein the water-containing inorganic compound / carbonate is 100/0 to 50/50 in terms of a solid mass ratio. The sheet-like nonflammable molding according to claim 1 or 2, wherein the water-containing inorganic compound comprises at least one selected from aluminum hydroxide, magnesium hydroxide, calcium hydroxide, dihydrate gypsum and calcium aluminate hydrate. body. The sheet-like incombustible molded article according to any one of claims 1 to 3, wherein the carbonate is calcium carbonate. The sheet-like incombustible molded article according to any one of claims 1 to 4, comprising a laminate of two or more sheet layers.