JPH0733507A - Panel material - Google Patents

Abstract

PURPOSE:To provide a panel material enhanced in the humidity-controlling property, heat resistance, heat-insulating property, etc., large in mechanical strength even when being thin and long, having a light weight, and excellent in applicability. CONSTITUTION:An obliquely meshed reinforcing material is embedded in an inorganic material containing porous inorganic particles such as diatomaceous earth and an inorganic hardening material such as slaked lime. The reinforcing material comprises warps 1 and wefts 2 both comprising resin-impregnated fiber bundles, wherein the plural warps 1 are crossed with the plural wefts 2 at different positions at a crossing angle theta of 90 deg.<theta <=170 deg.. The plural warps constitute the group of the warps extended at distances, respectively, in one direction. The plural wefts 2 constitute the group of the wefts extended at distances, respectively, in a direction crossing with the abovementioned direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel material useful as a building interior material such as a wall material or a floor material.

[0002]

2. Description of the Related Art Diatomaceous earth, which is widely used for wall materials, is excellent in humidity control, heat insulation, sound insulation, deodorization and radio wave absorption. Therefore, various panel materials including diatomaceous earth have been proposed as an interior material for construction in order to prevent dew condensation on a concrete wall or the like and to improve heat insulating properties. For example, in Japanese Utility Model Publication No. 54-85, a moisture absorptive and desorptive coating layer containing a lightweight fine granular aggregate, an inorganic or organic filler and a synthetic resin emulsion is formed on one side of a heat insulating and waterproof foam plate such as expanded polystyrene. A decorative veneer has been proposed.

In Japanese Patent Publication No. 58-46973, a heat insulating layer such as Styrofoam, a water absorbing / dehydrating layer in which voids of entangled fibers are impregnated with a water absorbing / dehydrating agent made of porous fine powder, and the heat insulating layer and the water absorbing layer are disclosed. An interior material having a dew-proof layer composed of a water-blocking layer and a dehydrating layer is disclosed.
In the water-absorbing and dehydrating layer, a porous fine powder such as diatomaceous earth,
A paste-like coating agent obtained by mixing and emulsifying a surfactant, an adhesive, and a synthetic resin solution is used, and an aqueous resin emulsion is used for the water shield layer.

Further, in Japanese Utility Model Publication No. 60-148417, the surface of a substrate made of polyethylene foam or the like is
A building wall material is disclosed in which an inorganic water-absorbing layer containing diatomaceous earth as a main component is formed through a polyester non-woven fabric.

Japanese Unexamined Patent Publication (Kokai) No. 1-208125 discloses a fireproof / weatherproof heat insulating material in which an inorganic layer containing diatomaceous earth is formed on at least one surface of a synthetic resin foam. This prior document describes that it is preferable to contain an ethylene-vinyl acetate copolymer emulsion in order to prevent the occurrence of cracks in the inorganic layer and enhance the adhesiveness with the synthetic resin foam.

Japanese Utility Model Laid-Open No. 4-2806 discloses a construction panel material in which a heat insulating plate composed of a core material made of foamed synthetic resin and a moisture absorbing material applied to both surfaces of the core material is attached to a plate material. Is disclosed. The hygroscopic material is composed of a fired powder of diatomaceous earth, celluloid fiber and a binder.

However, all of these interior materials have low heat resistance and fire resistance because the heat insulating layer is made of synthetic resin foam. Moreover, in order to increase the adhesive strength between the water absorbing layer or the hygroscopic material and the heat insulating material and to prevent cracks from being generated in the water absorbing layer or the hygroscopic material, an adhesive or a synthetic resin is required. For example, in the building wall material disclosed in Japanese Utility Model Publication No. 60-148417, it is not only difficult to form a non-woven fabric by impregnating an inorganic water-absorbing layer, but also the obtained wall material peels between layers. Easy to do. Therefore, the interior material is likely to warp, and the dimensional stability is reduced.

Further, in order to increase the strength of the panel material, a core material, a frame body, etc. are required, and the strength of the panel material is small only with an inorganic material such as a fired powder of diatomaceous earth. In particular, when the panel material is thin and long, the strength is greatly reduced. Although it is sufficient to increase the thickness in order to increase the strength, it becomes difficult to reduce the weight and the workability also decreases. As described above, it is difficult for the conventional panel material to enhance both mechanical strength, lightness and workability.

On the other hand, gypsum board is also known as a wall material in order to improve workability. This gypsum board is
Manufactured by pouring a slurry containing water such as baked gypsum, glass fiber or pulp, aggregates such as perlite, and water onto the lower paper, stacking the upper paper, molding it into a hod with a specified thickness using a molding roll, and drying and curing. ("Chemical Handbook Applied Edition, Revised 3rd Edition" (Chemical Society of Japan), edited by Maruzen Co., Ltd., March 15, 1980, pages 402-404, "Gypsum").

However, the board obtained by such a method also has a reduced strength if the thickness is reduced in order to reduce the weight and improve the workability.

As described above, although the porous inorganic powdery material such as diatomaceous earth is excellent in humidity control, heat resistance, heat insulation, fire resistance, sound insulation and deodorization, the strength of the panel material is high. Since it is small, it is difficult to obtain a panel material that is lightweight and has excellent workability.

[0012]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to maintain the excellent characteristics of the porous inorganic powder and to provide a large mechanical strength, a light weight and a good workability even if it is thin and long. It is to provide an excellent panel material.

Another object of the present invention is that the humidity controllability, heat resistance, heat insulation, fire resistance, sound insulation and deodorization are high, and the pull-out resistance of the reinforcing fiber and the burying effect and utilization rate of the fiber are high. Even in that case, it is to provide a panel material having a high reinforcing property, having no cracks and having excellent dimensional stability.

[0014]

As a result of intensive studies to achieve the above object, the present inventors have found that when a panel material is reinforced with a diagonal mesh reinforcing material, it has a large mechanical strength even if it is thin and long. Then, the present invention was completed.

That is, the panel material of the present invention is a panel material including a reinforcing material in which warp yarns and weft yarns made of fiber bundles impregnated with resin intersect and are joined to each other, and are extended at intervals in one direction. The plurality of warp yarns forming the warp yarn group and the plurality of weft yarns forming the weft yarn group extending at intervals in the direction intersecting the direction are different in position and 90 ° <θ
The reinforcing material intersecting at the intersecting angle θ of ≦ 170 ° is embedded in the inorganic material containing the porous inorganic powder and the inorganic curable substance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings as needed.

The reinforcing material contained in the panel material of the present invention has a feature that it has an oblique mesh shape. In the diagonal mesh reinforcing material, it is sufficient that the warp yarns and the weft yarns made of reinforcing fibers intersect each other at different positions at the above intersecting angle θ and are joined together.

FIG. 1 is a schematic plan view showing an example of a reinforcing material. In this example, the diagonal mesh reinforcing material is one warp yarn group consisting of warp yarns 1 extending in one direction at a predetermined interval and one weft yarn group consisting of weft yarns 2 extending in a direction intersecting the warp yarn 1 at a predetermined interval. It consists of a warp thread 1 and a weft thread 2
Intersect and are joined in a laminated state at the intersection.

In the diagonal mesh reinforcing material, the intersection angle θ between the warp threads 1 and the weft threads 2 can be appropriately selected within the above range depending on the main load direction acting on the panel material, but is preferably 100. The angle is about ≦ θ ≦ 140 °.

In the panel material in which such a diagonal mesh reinforcing material is embedded, when the stress F in the main load direction acts, the warp yarn 1 and the weft yarn 2 at which the stress F diagonally intersects.
Is divided by. Therefore, by embedding the oblique mesh reinforcing material in the direction in which the stress F acts on the panel material with the acute angle portion of the intersection facing, it is possible to enhance the reinforcing property. The strength in the longitudinal direction can be increased. Further, since the warp yarns 1 and the weft yarns 2 are arranged obliquely with respect to the load direction, the pullout resistance from the panel material is large. Therefore, the reinforcing efficiency of the mesh-like reinforcing material against stress such as bending load is high, and the effect of embedding fibers and the effective rate can be improved. Moreover, since there is strength directional property (anisotropic) that the rigidity in the direction in which the acute angle portion is directed is increased at the intersection, bending bending in the direction in which the acute angle portion is directed is small, and workability and workability are improved. .

Such an oblique mesh reinforcing material can be obtained by various methods, for example, by crossing and joining resin-impregnated fiber bundles in a mesh shape at the angle described above, or by intersecting them in a mesh shape to form a fiber bundle. Resin may be impregnated and joined. Moreover, the warp yarn and the weft yarn may be intertwined with each other at the intersection. The diagonal mesh reinforcing material is hooked with fiber bundles on the pins arranged around it in the order of one stroke,
It can also be obtained by a pin winding method in which the crossing angle θ1 is oblique within the range of 45 ° <θ1 ≦ 85 °.

The diagonal mesh reinforcing material is made to reciprocate a resin-impregnated fiber bundle along the direction of the rotation axis of a rotating body such as a rotating drum, while depending on the desired reinforcing fiber structure (construction method). The warp thread and the weft thread are not orthogonal to each other, for example, the winding angle θ1 with respect to the rotating body is 45 ° <
It can be efficiently obtained by setting θ 1 ≦ 85 °, preferably about 50 ° ≦ θ 1 ≦ 70 °, by winding it around the rotating body in a mesh shape, and processing the wound fiber bundle into a sheet shape. For example, in the reinforcing material shown in FIG. 1, the resin-impregnated fiber bundle is wound around a rotating body at a predetermined pitch in one direction to form a warp thread 1, and the warp thread 1 is crossed with the warp thread 1 while intersecting the warp thread 1. It can be manufactured by constructing the weft thread 2 by winding the warp thread 1 at a predetermined pitch.

In a preferred method, one resin-impregnated fiber bundle is wound in one direction at a predetermined pitch to form a warp, and is wound at a predetermined pitch in a direction intersecting with the formed warp and a weft. After the formation, the method includes displacing the position at least once or more in the one direction and the intersecting direction, preferably displacing the position at substantially equal intervals and reciprocatingly winding.

FIG. 2 is a schematic plan view showing another example of the oblique mesh reinforcing material. In the oblique mesh reinforcing material of this example, a first warp group consisting of warp threads 11a extending in one direction at a predetermined interval and a first warp thread 12a extending in a direction intersecting the warp thread 11a with a first interval. A second weft yarn consisting of a weft yarn group, a second warp yarn group consisting of warp yarns 11b extending at a predetermined interval in the one direction, and a weft yarn 12b extending at a predetermined interval in a direction intersecting with the warp yarns 11b of the second warp yarn group. The groups and the groups intersect at different positions in sequence, and are joined in a laminated state at the intersections.

In the reinforcing material having the structure (construction method) shown in FIG. 2, a resin-impregnated fiber bundle is wound in one direction at a predetermined pitch to form a first warp yarn 11a, and the wound warp yarn 1 is formed.
The first weft yarn 12a is formed by winding the warp yarn 11a at a predetermined pitch while intersecting with the laft yarn 1a. Then, the resin-impregnated fiber bundle is wound in the one direction while forming a second warp yarn 11b at a pitch positioned between the first warp yarns 11a and while intersecting with the first weft yarns 12a. , At a pitch located between the first weft threads 12a,
Moreover, it can be manufactured by winding the first warp yarn 11a on the first and second warp yarns 11a and 11b while intersecting the first warp yarn 11a to form the second weft yarn 12b.

FIG. 3 is a schematic plan view showing still another example of the diagonal mesh reinforcing material. In this example, the diagonal mesh reinforcing material is a warp yarn 2 extending at a predetermined interval in one direction.
A first warp yarn group consisting of 1a, a first weft yarn group consisting of weft yarns 22a extending at a predetermined interval in a direction intersecting with the warp yarns 21a, a second warp yarn group consisting of warp yarns 21b similar to the above, and A second weft thread group consisting of similar weft threads 22b;
A third warp yarn group consisting of the warp yarns 21c and a third weft yarn group consisting of the weft yarns 22c sequentially intersect at different positions and are joined in a laminated state at the intersecting portions.

In the reinforcing member shown in FIG. 3, the second and third warp yarns 21b and 21c are arranged at substantially equal intervals between the first warp yarns 21a, and the second and third warp yarns 22a are arranged between the first warp yarns 22a. Weft 22
b, 22c are positioned at substantially equal intervals, and moreover, the plurality of warp yarns 21 between the first warp yarn 21a and the third weft yarn 22c are arranged.
It can be manufactured by alternately intersecting b, 21c and wefts 22a, 22b.

Examples of the reinforcing fiber constituting the fiber bundle include glass fiber; ceramic fiber such as aluminum silicate fiber, alumina fiber and silicon carbide fiber; polymer such as polyacrylonitrile, phenol resin and rayon, petroleum or coal. Carbon fiber made of pitch based material; polyethylene fiber, polypropylene fiber, cellulose fiber, rayon fiber, acetate fiber, nylon fiber, polyester fiber, polyvinyl alcohol synthetic fiber (vinylon fiber), polyether sulfone fiber, aromatic polyamide fiber Polymer fibers such as aramid fibers and the like can be mentioned. At least one of these fibers can be used.

Among these fibers, in order to enhance the reinforcing effect and the dimensional stability, fibers having a large tensile elastic modulus such as glass fiber, carbon fiber, polypropylene fiber, polyvinyl alcohol-based synthetic fiber and aramid fiber are used. preferable.

The filament diameter of the fiber is, for example, about 5 to 30 μm. A fiber bundle is made up of a suitable number of strands, for example 500
It can be composed of about 480000 strands.

The fiber bundle may be wound around a rotary drum without twisting. However, twisting can prevent the fiber bundle from becoming flat when wound around the drum, and constitutes a panel material. The adhesiveness with the inorganic material can be enhanced. The number of twists of the fiber bundle can be appropriately selected,
It is 5 to 30 times, preferably 10 to 15 times per 1 m.

When the resin-impregnated fiber bundle is wound on the rotary drum, the tension of the resin-impregnated fiber bundle is adjusted to
As in the case of pressing the resin-impregnated fiber bundle, the adhesion between the fiber bundles can be increased. Further, since all the resin-impregnated fiber bundles can be crossed, the material can be effectively used.

Examples of the resin with which the fiber bundle is impregnated are thermosetting resins such as epoxy resin, phenol resin, vinyl ester resin, diallyl phthalate resin, unsaturated polyester resin, thermosetting acrylic resin, polyurethane resin, and polyimide. And thermoplastic resins such as polyacetal, polysulfone, polyether sulfone, polyphenylene sulfide, polyphenylene oxide, polyarylate, and aromatic polyamide. The above resins are used alone or in combination of two or more. Of these resins, thermosetting resins, particularly epoxy resins, vinyl ester resins, phenol resins and the like are preferable. When a thermosetting resin is used, a curing agent depending on the type of resin can be used.

The amount of resin impregnated can be selected within a range that does not impair the integrity of the fiber bundle. For example, the volume content is 10 to 80.
%, Preferably about 20 to 60%. If necessary, the resin excessively attached to the fiber bundle may be removed in the resin impregnation step.

The mesh spacing of the reinforcing fibers can be appropriately set according to the reinforcing performance and is, for example, 2 mm or more, preferably 5 to 300 mm, more preferably 10 to 200 m.
It is about m. When the mesh interval is less than 2 mm, the amount of the inorganic material filled between the meshes is small and the reinforcing property is insufficient. If the mesh spacing exceeds 300 mm,
The required reinforcement may not be obtained.

The warp and weft pitches may be the same or different. Further, the numbers of filaments and the diameters of the warp yarns and the weft yarns may be the same or different. The number of warp yarn groups that form the warp yarns of the reinforcing material and the number of weft yarn groups that form the weft yarns may be the same or different as long as the weft yarns or the warp yarns intersect with each other.

The reinforcing material may be surface-treated with a silane coupling agent, a titanium coupling agent, or the like in order to enhance the affinity with the inorganic material of the panel, and further, sand may be attached to the surface. The uneven portion may be formed by polishing or the like. For silane coupling agents and sand,
The fiber bundle may be impregnated with the resin.

The proportion of the oblique mesh reinforcing material in the panel material can be selected according to the size of the panel material, etc., and is usually 0.05 to 5% by volume, preferably 0.1 to 3% by volume.
It is a degree.

Examples of the porous inorganic powdery particles contained in the panel material of the present invention include porous powdery particles having an adsorbing property,
For example, activated carbon, diatomaceous earth, acid clay, activated clay, activated alumina, titanium oxide, bentonite, perlite,
Examples thereof include vermiculite, shirasu balloon, calcined kaolin, and magnesium silicate. These porous inorganic powders can be used alone or in combination of two or more. The panel material containing the porous inorganic powder has high humidity control, dew resistance, heat insulation, fire resistance, sound insulation and deodorization.

Preferable porous inorganic powdery particles include porous inorganic powdery particles, especially diatomaceous earth, which are excellent in moisture absorption / release (humidity control), heat resistance, heat insulation, fire resistance, sound insulation and deodorization. . The diatomaceous earth is, for example, dry diatomaceous earth containing almost no water or, for example, 500 ° C. or higher, preferably 600 to 100.
A fired powder of diatomaceous earth fired at a temperature of about 0 ° C. is preferred.

The particle size of the inorganic powder is often, for example, 150 mesh or less, and the specific surface area is 5 to 300.
It is often about 0 m ² / g.

The content of the inorganic powdery particles is 10 to 95% by weight, preferably 30 to 75% by weight, based on the whole panel material. When the content of the inorganic powdery particles is less than 10% by weight, the heat insulating property and the humidity control property are deteriorated, and when the content exceeds 95% by weight, the mechanical strength is easily decreased.

Examples of the inorganic curable substance include gypsum;
Lime such as slaked lime and dolomite plaster; it contains hydraulic substances. Examples of hydraulic materials include cement (eg, Portland cement, early-strength Portland cement, alumina cement, rapid-hardening high-strength cement, self-hardening cement such as gypsum; lime slag cement,
Hydraulic cement such as blast furnace cement; mixed cement) and the like. Preferred inorganic curable substances include, for example, gypsum, slaked lime and dolomite plaster. Since the dolomite plaster is generally in the form of fine particles having a uniform particle size, it has an advantage that it is excellent in water retention and workability and can be applied without using a sizing agent.

The content of the inorganic curable substance is, for example, 5 to 95% by weight, preferably 20 to 75% by weight, more preferably 30 to 60% by weight, based on the whole panel material. When the content of the inorganic curable substance is less than 5% by weight, the strength of the panel material is likely to decrease, and when it exceeds 90% by weight, the moisture absorption and desorption property of the porous inorganic powder is impaired, and dew condensation is likely to occur. .

When an inorganic curable substance is contained, the strength of the panel material can be further improved by curing the inorganic curable substance in combination with the reinforcing effect of the reinforcing material.

Furthermore, in order to disperse cracks in the panel material, prevent the occurrence of cracks and warpage, enhance dimensional stability, and further enhance strength, the panel material may contain short fibers. The short fibers can be appropriately selected from the above-mentioned reinforcing fibers, and the kind thereof may be different from that of the reinforcing fibers of the oblique mesh reinforcing material.

The length of the short fibers is, for example, 0.1 to 10 m.
m, and short fibers of about 0.5 to 7.5 mm are often used. The aspect ratio of the short fibers is preferably about 50 to 5000 in order to enhance the reinforcing property.

The mixing ratio of the short fibers can be selected according to the desired strength of the panel material, for example, 0.1 to 5% by volume,
It is preferably about 0.5 to 5% by volume.

The panel material is a fine-grained aggregate such as sand, silica sand, perlite; a colorant, a hardening agent, a set retarder such as an organic acid salt or an inorganic acid salt, a hardening accelerator such as calcium chloride,
Water reducing agents such as sodium naphthalene sulfonate, coagulants, carboxymethyl cellulose, methyl cellulose,
It may contain various additives such as a thickener such as polyvinyl alcohol, a foaming agent, a waterproofing agent such as a synthetic resin emulsion, and a plasticizer.

In the panel material of the present invention, the oblique mesh reinforcing material is placed in a mold, and an inorganic fluid composition (mortar) composed of a mixture of the above components and water is cast in the mold. ,
It can be produced by drying and curing.

The arrangement direction of the oblique mesh reinforcing material is not particularly limited, but the reinforcing property in the direction in which the acute angle portion is directed is higher than the reinforcing property in the direction in which the obtuse angle portion is directed at the intersection of the reinforcing material. You can Therefore, it is preferable that the oblique mesh reinforcing material is arranged in the form with the acute angle portion of the intersection facing in the direction of the stress F acting on the panel material and embedded in the panel.

When the reinforcing material is arranged in the above-mentioned direction,
In the long panel material, since the stress in the main load direction is divided by the oblique mesh reinforcing material as described above, the reinforcing property in the longitudinal direction can be enhanced. In addition, as described above, since the pulling-out resistance from the panel is large, the reinforcing effect can be further enhanced. Also, the reinforcing material is
Since the warp yarns and the weft yarns cross each other diagonally, there is a directionality of strength (anisotropy) that the rigidity in the longitudinal direction of the mesh muscle itself, that is, the direction in which the acute angle portion is directed at the crossing portion is high, so that it is an orthogonal type. Mesh is non-directional in strength (isotropic)
Unlike the above, the workability can be improved.

Therefore, even if the thickness is thin and long, the mechanical strength is high, the weight is light and the workability can be improved. In the long panel material as described above, since the load often acts in the longitudinal direction rather than in the short side direction, the strength is extremely effectively expressed in the longitudinal direction,
Sufficient strength can be secured even in the short side direction.

The embedding position (fog) of the oblique mesh reinforcing material can be appropriately selected according to the shape, thickness and size of the panel material. Further, the number of plies of the diagonal mesh reinforcing material may be plural. The curing may be carried out under heating, but usually, it can be cured, for example, in about 12 hours to 4 days by leaving it at room temperature.

The panel material of the present invention may have a flat plate shape or a curved plate shape. Although the thickness of the panel material can be selected according to the application, it is usually 5 to 200 mm, preferably 10 to 100 mm in many cases. INDUSTRIAL APPLICABILITY The panel material of the present invention is useful as a building interior material or exterior material such as a wall material or a floor material.

[0056]

EFFECTS OF THE INVENTION Since the panel material of the present invention contains a diagonal mesh reinforcing material, a porous inorganic powder and an inorganic curable substance, it has high humidity control and heat resistance and is thin and long. However, it has high mechanical strength and is lightweight and excellent in workability. In addition, the pull-out resistance of the reinforcing fiber and the utilization rate of the fiber are high,
Even with a small amount, it has high reinforcing properties and does not generate cracks and has excellent dimensional stability.

The panel material in which the porous inorganic powder is diatomaceous earth has high humidity control, heat resistance, heat insulation, fire resistance, sound insulation and deodorization. When the inorganic curable substance is gypsum, slaked lime, or dolomite plaster, the weight can be reduced and the heat resistance and fire resistance can be improved.

[0058]

EXAMPLES The present invention will be described in more detail based on the following examples.

Example 1 Three polyacrylonitrile-based carbon fibers having a number of strands of 12,000 (12K) (tensile strength 300 kgf / mm ² , tensile modulus 24 × 10 ³ kgf / mm ² ) were collected to make 36K, 12 per 1 m. Twisted twice. To this fiber bundle, 100 parts by weight of a bisphenol A type epoxy resin (produced by Yuka Shell Co., Ltd., trade name Epicoat 827), 90 parts by weight of an acid anhydride-based curing agent (produced by Petrochemical Co., MNA) and a curing accelerator (oiled shell). EMI-24) manufactured by KK, while being impregnated with 1 part by weight of a solution, wound at a yarn speed of 20 m / min on a rotating drum (600 mmφ) over a width of 1 m so that a winding angle of 65 ° and a fiber interval of 5 cm. I took it. After winding
The operation of the apparatus was stopped, one side of the wound resin-impregnated fiber bundle was cut open to form a sheet, and the resin was cured at 150 ° C. for 4 hours to obtain a reinforcing material having a resin content of 50% by weight. . The obtained reinforcing material is 300 mm wide and 1200 mm long.
Cut into a size of mm, and formwork (length 120 cm, width 30
cm, depth 2 cm).

Fired diatomaceous earth (particle size 10 to 40 μm)
60 parts by weight and dolomite plaster (particle size 1 to 10
(0 μm) 40 parts by weight and 40 parts by weight of water were kneaded, and the kneaded product was poured into the mold, dried and cured to obtain a panel material. Bending strength of the panel material, span 9
When measured by a 3-point bending test of 0 cm, 180 k
It was g / cm ² . Moreover, when the thermal conductivity of the panel material was measured, it was 0.16 kcal / mh ° C.

Example 2 A reinforcing material was obtained in the same manner as in Example 1 except that the winding angle was 50 °. The obtained reinforcing material was embedded in a kneaded product in the same manner as in Example 1 to produce a panel, and the three-point bending strength of the panel was 130 kgf / cm ² .

Example 3 A reinforcing material was obtained in the same manner as in Example 1 except that the winding angle was 70 °. The obtained reinforcing material was embedded in a kneaded product in the same manner as in Example 1 to produce a panel, and the three-point bending strength of the panel was 220 kgf / cm ² .

Comparative Example 1 Using the same fibers as in Example 1, while impregnating the epoxy resin, the pins struck around the plate were sequentially hung in the longitudinal direction and the lateral direction in a one-stroke manner, and per 1 m ² A biaxially orthogonal mesh was prepared so that the amount of carbon fibers used was the same as in Example 1, and the resin was cured at 150 ° C. for 4 hours to obtain a reinforcing material having a resin content of 50% by weight. The reinforcing material thus obtained was embedded in a kneaded material in the same manner as in Example 1 to produce a panel, and the three-point bending strength of the panel was 95 kgf /
It was cm ² .

Comparative Example 2 The oblique mesh reinforcing material used in Example 1 was kneaded with 100 parts by weight of dolomite plaster and 40 parts by weight of water,
It was embedded in the kneaded material to prepare a panel. The three-point bending strength of the panel was 190 kgf / cm ² . Moreover, when the thermal conductivity of the panel material was measured, it was 0.9 kcal / mh.
It was ℃.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an example of a reinforcing material.

FIG. 2 is a schematic plan view showing another example of the oblique mesh reinforcing member.

FIG. 3 is a schematic plan view showing still another example of the oblique mesh reinforcing material.

[Explanation of symbols]

 1, 11a, 11b, 21a, 21b, 21c ... Warp yarn 2, 12a, 12b, 22a, 22b, 22c ... Weft yarn

Claims (5)

[Claims] 1. A panel material including a reinforcing material in which warp yarns and weft yarns made of resin-impregnated fiber bundles intersect and are joined to each other, and constitute a warp yarn group extending at intervals in one direction. A plurality of warp yarns and a plurality of weft yarns forming a weft yarn group extending at intervals in a direction intersecting the direction intersect at different positions and at an intersecting angle θ of 90 ° <θ ≦ 170 °. A panel material in which the reinforcing material is embedded in an inorganic material containing a porous inorganic powder and an inorganic curable substance. 2. A panel material according to claim 1, wherein a plurality of warp yarn groups and a plurality of weft yarn groups are embedded in a reinforcing material which is sequentially laminated and intersects at different positions. 3. The panel material according to claim 1, wherein a reinforcing material composed of a fiber bundle twisted 5 to 30 times per 1 m is embedded. 4. The panel material according to claim 1, wherein the porous inorganic powdery material is diatomaceous earth. 5. The panel material according to claim 1, wherein the inorganic curable substance is gypsum, slaked lime, or dolomite plaster.