JP2009270380A - 60 min heatproof building material and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire resistant building material capable of passing a 60 min fire resistance test and being mass-producible. <P>SOLUTION: This 60 min heatproof building material is composed of a core material (a) made of (a-1) a composite resin sheet constituted by heating, compressing, and molding composite chips comprising 85-70 wt.% of a hydration metal compound and 15-30 wt.% of a thermoplastic resin or (a-2) a composite mortar sheet formed by mixing the composite chips comprising 85-70 wt.% of the hydration metal compound and 15-30 wt.% of the thermoplastic resin with a wall material such as cement or gypsum or the like, an intermediate layer (b) composed of fiber nets provided on both surfaces of the core material and nipping and holding the core material, and an outer layer (c) composed of an inorganic fire resistant layer formed by the cement or the gypsum composition formed on one surface or both surfaces of the core matrial through the fiber nets. This heatproof building material has the physical properties causing no weight loss of 30% or more in a noncombustibility test and no collapse due to burning of the core material in the 60 min fire resistance test. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an improvement of a lightweight cement board for an outer wall / inner wall base, and in particular, has been improved so that a composite material composed of a thermoplastic resin and a hydrated metal compound is effectively used as a core material and passed a 60-minute fire resistance test. The present invention relates to a fireproof building material and a manufacturing method thereof.

  Lightweight cement boards for outer and inner wall substrates have been used as outer and inner wall substrates for 40 years in the United States. In Japan, it is used for roof construction and exterior wall construction.

  This cement board is made by mixing Portland cement with volcanic rubble (lightweight aggregate) called keil and kneading with water, and using an alkali-resistant glass fiber mesh embedded in the cement slurry on the front and back. In addition to exhibiting durability and fire resistance, it has a flexible characteristic (flexibility), so it has the feature that curved surface construction is possible.

  This kind of cement board can also be used for wooden frames, frame construction methods, and steel structures, and is subject to non-combustible material certification as a material. It has been certified as a 30-minute fireproof structure (wooden frame / framework) and 45-minute quasi-fireproof (wooden frame / framework) with the ventilation method of inorganic insulation, but to make it a 60-minute fireproof structure. This is not sufficient, and at present, the outer wall is required to be a concrete wall, while the inner wall is required to use a 12 mm thick gypsum board encapsulating glass fiber. It is extremely difficult to realize a fire-resistant structure of this type due to workability and construction cost.

  Therefore, as a fireproof covering material, a glass silicate plate and a fiber reinforced cement board or a gypsum board integrated (Patent Document 1) or a fiber reinforced cement board 1 is laminated with a glass mesh or a carbon mesh and a urethane foam. A laminated structure (Patent Document 2) in which a plaster board is attached after lamination has been proposed.

Japanese Patent Application Laid-Open No. 5-711169 JP 2006-112038 A

  However, Patent Document 1 is intended for a fireproof coating of a steel structure column or beam, and is not suitable for a general outer wall inner wall base application. On the other hand, the stacked structure described in Patent Document 2 has a large number of stacked layers and is not suitable for mass production. Then, this invention makes it a subject to provide the cement board which is excellent in mass-productivity, is lightweight and thin, and fits a 60-minute fireproof structure test in view of this problem.

As a result of diligent research, the present inventors have found that the fire resistance of the core material on the inner surface of the cement board is important in order to obtain a 60-minute fire-resistant structure, where a hydrated metal compound, preferably aluminum hydroxide, water, Used as an aggregate when forming a core with a composite material containing 70% by weight or more, preferably 75% by weight or more of magnesium oxide or calcium hydroxide, or forming a core with cement, gypsum or calcium silicate Then, it was found that a cement board having a 30-minute or 45-quasi-refractory structure usually has a physical property that becomes a fire-resistant structure for 60 minutes, and the present invention has been completed.
The gist is (a-1) a composite resin sheet obtained by heat compression molding a composite chip comprising 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin or (a-2) It is composed of a composite mortar sheet formed by mixing a composite chip composed of 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin as an aggregate in a wall material such as cement, mortar or gypsum. A core material (a), an intermediate layer (b) made of a fiber net attached to both surfaces of the core material and sandwiching the core material, and a cement formed on one or both surfaces of the core material via the fiber net, It consists of the outer layer (c) which consists of an inorganic fireproof layer which consists of a mortar or a gypsum composition, It is characterized by the above-mentioned.

According to the present invention, the core material is composed of the composite fireproof sheet formed by mixing and molding the hydrated metal compound 85 to 70% by weight with respect to 15 to 30% by weight of the thermoplastic resin. Because it is clamped by the fiber net, there is no weight loss of 30% or more even in the incombustible test, the core material is firmly clamped by the fiber net, and it does not collapse in the 60-minute fire resistance test and has sufficient fire resistance performance. Become.
A composite mortar sheet formed by mixing a composite chip formed by mixing 85 to 70% by weight of a hydrated metal compound with 15 to 30% by weight of a thermoplastic resin into a wall material such as cement or gypsum as an aggregate. In (a-2), the fire resistance of the mortar material is further improved by the blending of the hydrated metal compound. Therefore, the fire resistance of the mortar material is not inferior to that of the composite fireproof sheet. It will be.

  FIG. 1 shows a cement board having a preferred structure according to the present invention. (A-1) From a composite refractory sheet obtained by mixing and molding 85 to 70% by weight of a hydrated metal compound to 15 to 30% by weight of a thermoplastic resin. A core material (a), an intermediate layer (b) made of a fiber net attached to both surfaces of the core material and sandwiching the composite fireproof sheet, and formed on one or both surfaces of the composite fireproof sheet via the fiber net And an outer layer (c) comprising an inorganic refractory layer comprising a cement, mortar or gypsum composition.

  As shown in FIG. 2, the composite refractory sheet is cemented with a composite chip formed by mixing 85 to 70% by weight of a hydrated metal compound with 15 to 30% by weight of a thermoplastic resin as a core (a). , A lightweight composite mortar sheet (a-2) formed by mixing in a wall material such as mortar or gypsum.

  A composite material obtained by melting and kneading a powdery or granular composition obtained by adding 85 to 70% by weight of a hydrated metal compound to 15 to 30% by weight of the thermoplastic resin in the composite fireproof sheet (a-1) It is preferable that the composite material is formed by crushing and then heat compression molding. When the thermoplastic resin is 15% by weight or less, there are problems in kneadability with the hydrated metal compound and moldability of the crushed composite material. On the other hand, if it exceeds 30% by weight, it will affect the weight loss in the nonflammability test, which makes it difficult to maintain the weight loss below 30%, which is not preferable. In particular, it is preferably 15% by weight or more and 25% by weight or less.

  Here, as the thermoplastic resin, polyethylene (PE), polyethylene terephthalate (PET, PETE), polyvinyl chloride (PVC), polylactic acid (PLA), polypropylene (PP), polyamide (PA), polycarbonate (PC), Teflon (registered trademark) (PTFE) Polyurethane (PU), polystyrene (PS), saturated polyester, ABS resin (ABS), acrylic resin (PMMA), polyacetal resin (POM), etc. You can choose.

  Examples of the hydrated metal compound added as a composite material include aluminum hydroxide (decomposition start temperature 200 ° C., endothermic amount 470 cal / g), calcium hydroxide (decomposition start temperature 380 ° C., endothermic amount 222 cal / g), magnesium hydroxide. Various additives such as (decomposition start temperature 340 ° C., endothermic amount 320 cal / g), calcium aluminate (decomposition start temperature 250 ° C., endothermic amount 340 cal / g) can be selected, and the physical properties of this seed hydrated metal compound Various flame retardants may be used in combination as long as they do not interfere with ZnO, zinc borate, zinc stannate, carbon black, copper nitrate, iron nitrate, metal sulfonate, phosphazene compound, nanocomposite filler, fumed silica, PAN Etc. can also be used as appropriate.

  It is important that the combination of the thermoplastic resin and the hydrated metal compound is selected so that the decomposition temperature of the hydrated metal compound is lower than the melting temperature of the thermoplastic resin. The above can be mixed and used.

  In order to mix the two uniformly, the blending amount of the hydrated metal compound with respect to the thermoplastic resin is as extremely high as 70% by weight or more, so the resin component melts due to the shear heat during mixing, and sufficient with the hydrated metal compound. The types and mixing ratios of the thermoplastic resin and the hydrated metal compound are optimized so that the mixing can be performed. Depending on the melting temperature and fluidity of the thermoplastic resin, it is often preferable to mix it with the hydrated metal compound in the form of powder or granules. Moreover, in order to adjust the melt fluidization physical property of an intermediate piece so that the crushed intermediate piece can be heat-compressed, fluidized, and integrally molded, it may be good to mix 2 or more types of thermoplastic resins. For example, a part of the elastomer may be blended to adjust the fluidity of the thermoplastic resin.

  A glass fiber net is usually used as the fiber net forming the intermediate layer (b), but there is no problem even if a synthetic resin fiber such as a carbon resin is used.

  As the outer layer (c), a composition such as cement, mortar or gypsum which is usually used as a cement boat is used. When an aggregate is used, it is hydrated with respect to 15 to 30% by weight of the thermoplastic resin. It is preferable to use a composite chip formed by mixing and molding 85 to 70% by weight of a metal compound because the inorganic fire resistance is improved. In the composite chip, a composite material obtained by melting and kneading a powder composition obtained by adding 85 to 70% by weight of a hydrated metal compound to 15 to 30% by weight of a thermoplastic resin has an average particle diameter of about 30 mmφ or less. It can be crushed and prepared as fine aggregate and coarse aggregate. The composite chip is obtained by adding natural or synthetic fiber to a powdery or granular composition obtained by adding 85 to 70% by weight of a hydrated metal compound to 15 to 30% by weight of a thermoplastic resin, and melt-kneading to solidify. The composite material may be crushed and manufactured. In order to prevent decomposition during kneading, aluminum hydroxide may be used when a resin having a relatively low melting temperature, polyethylene, polyvinyl chloride, or acrylic resin is used. Alternatively, the whole may be mixed with magnesium hydroxide or calcium hydroxide.

  Although the refractory building material according to the present invention may be produced in a factory and used on site as it is, as shown in FIGS. 3 and 4, (a-1) hydrated with respect to 15 to 30% by weight of the thermoplastic resin. A composite resin sheet formed by mixing and molding 85 to 70% by weight of a metal compound or (a-2) a composite chip formed by mixing and molding 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin. Half of the intermediate layer (b) made of a glass fiber net is attached to both sides of a core material (a) made of a composite mortar sheet formed by mixing in a wall material such as cement or gypsum as an aggregate. Even a product is useful because it can be used in the field by forming a cement layer on its surface.

According to the present invention, a refractory building material can be produced for 60 minutes by the following three methods.
First, as shown in FIG. 5, in the first method, 85 to 70% by weight of a hydrated metal compound is added to 15 to 30% by weight of powdered or granular thermoplastic resin in a kneader (kneader). The composite material (b) melted and kneaded by shearing and solidified is crushed (c) to an average particle size of approximately 30 mmφ or less to produce a crushed intermediate piece (d), and the crushed intermediate piece is placed on the thermoformed surface. It is put into the placed mold (e), pressed into the mold from the top by the thermoforming surface, melted and integrated to form a composite heat-resistant sheet (f), and glass is bonded to both sides of the composite heat-resistant sheet via an adhesive. It comprises a step (h) of attaching a fiber net (g), applying a cement, mortar or gypsum layer to the surface of the glass fiber net and drying it.

  In the second method, as shown in FIG. 6, 85 to 70% by weight of a hydrated metal compound is added to 15 to 30% by weight of powdered or granular thermoplastic resin in a kneader (kneader) and subjected to shearing. The composite material (b) that has been melt-kneaded and solidified is crushed (c) to an average particle size of approximately 30 mmφ or less to produce a crushed intermediate piece (d), and a glass fiber net is disposed on the lower thermoforming surface, The above-mentioned crushing intermediate piece is put into a mold that is open on the top and bottom, and a glass fiber net is attached to the top surface of the crushing intermediate piece in the mold to prepare for molding (e), and the heat-molded surface from above Into the mold, melt and integrate the crushing intermediate piece, and form a composite heat-resistant sheet (g) sandwiched between the front and back surfaces with a glass fiber net, and apply a cement or gypsum layer to the glass fiber net surface, Dry and finish Consisting of gel process.

  The third method is a case where a composite mortar board is used instead of the composite resin board in the steps of FIG. 5 and FIG. 6, and as shown in FIG. 85 to 70% by weight of a hydrated metal compound is added to 30% by weight, melted and kneaded under shear, and the solidified composite material (b) is crushed (c) to an average particle size of approximately 30 mmφ or less and crushed A composite mortar board (f) is formed by producing a piece (d) and injecting and solidifying a composition obtained by mixing the crushed intermediate piece (d) with a mortar material into a mold to form a composite mortar board (f). In the molding of f), a composition in which the glass fiber net (b) is arranged on the molding surface, and the above-mentioned crushing intermediate piece and cement, mortar, or gypsum are mixed in a mold that is arranged on the top and bottom. Throw objects (e), upward After being pushed into the mold with a push-push mold, the composition is slightly exuded from the fiber net to form a mortar layer on the glass fiber net surface (f), and then the glass on the upper surface of the composition in the mold A fiber net can be attached (g), and a cement or gypsum layer can be applied to the surface of the fiber net and dried to finish (h). In the case of FIG. 7, the fiber net is formed on each side, but both sides can be formed simultaneously with the mortar board to form the mortar surface, or after the mortar board is formed first, the fiber net is attached to both sides. And a mortar layer can also be formed. Here, the mortar layer means an inorganic refractory layer such as cement, mortar or gypsum.

  It is preferable to knead the thermoplastic resin and the hydrated metal compound as a powdery composition because they can be melt-kneaded by shearing with a kneader. As the kneader, it is preferable to use a kneader which is easily sheared, and it is preferable to use a pressure kneader or an intensive mixer rather than a uniaxial or biaxial extruder.

  A known crusher can be used for crushing. An intermediate piece is prepared by crushing a composite material obtained by melting, kneading and solidifying a powdered composition containing 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin. To do. The intermediate piece includes powdered or granular crushed particles, flaky crushed pieces, and crushed crushed lumps, but considering the formability and fluidity in the next step, the average particle size is preferably about 30 mmφ or less.

  The intermediate piece may be heated and pressed by upper and lower rollers, or may be melted and fluidized in a pair of upper and lower thermoforming molds and integrally molded.

  FIG. 10 is a conceptual diagram of a semi-finished continuous molding method in the case of using a composite resin sheet as a core, continuously feeding a glass fiber mesh sheet onto a conveyor belt, and placing a formwork at regular intervals, Next, the crushing intermediate piece is filled in the mold, spread uniformly, and then heated and compressed, and the intermediate piece is partially melted and fluidized in the mold to be integrated. When lowered to a predetermined temperature, the mold can be opened, a glass fiber mesh is laid thereon, an adhesive or cement layer is applied, and the edges are cut to produce a semi-finished product.

  FIG. 11 is a conceptual diagram of a method for continuously forming a semi-finished product when a composite mortar sheet is used as a core material. A mold frame is placed on a conveyor belt at regular intervals, and a glass fiber mesh sheet is continuously formed thereon. The composite mortar composition prepared by feeding and applying the slurry material and then mixing the crushed intermediate piece as an aggregate is filled in the mold, uniformly spread, and then molded and integrated. Then, a glass fiber mesh is spread on it, a slurry material is applied thereto, the edge of the glass fiber mesh is cut and cured, and a semi-finished product can be manufactured.

  The fireproof building material according to the present invention can be applied to a painted wall system in the same manner as a conventional cement board. FIG. 11 is a perspective view showing a configuration of a painted wall system, in which a moisture-permeable waterproof sheet is stretched on a structural plywood, and cement board (fireproof according to the present invention) is disposed through a trunk material arranged in parallel at regular intervals. Building material) is attached to the entire surface of the structural plywood using wood screws. Then, a glass fiber tape is appropriately put on the cement board, an outer wall base coat is applied thereon, and an outer wall material is attached on the base coat to achieve an outer insulation method. Since the cement board according to the present invention has a fire resistance performance of 60 minutes, the painted wall system shown in FIG. 12 has an excellent fire resistance structure.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 8 and 9 show a preferred embodiment of a method for producing a refractory building material according to the present invention. When manufacturing the core material, a hydrated metal compound such as aluminum hydroxide, magnesium hydroxide, or calcium carbonate is prepared. As the hydrated metal compound or calcium carbonate, a powdery one having an average outer diameter of 10 μm to 35 μm is used.

  Moreover, as the thermoplastic resin, for example, a thermoplastic resin such as powder or granular polypropylene or polyethylene having an appropriate size is prepared.

  On the other hand, the heater of the kneading machine is operated, and the inside of the kneading machine is raised to the melting temperature of the thermoplastic resin, for example, a temperature in the range of 100 ° C to 300 ° C, and the powdery thermoplastic resin is put into the kneading machine. Charge and melt with stirring and stirring. The resin may be charged at a time or may be divided into a plurality of times. Since heat is generated by the stirring of the molten resin by the rotation of the stirring blade during the melting of the resin, the heating temperature by the heater may be slightly lower than the melting temperature of the resin.

  When the thermoplastic resin is sufficiently softened or melted, the prepared filler, for example, a hydrated metal compound or calcium carbonate, is charged into the kneader at once or in several times, and the softened and melted thermoplastic resin and filler and The colorant is kneaded so as to be substantially uniform. For kneading, a pressure kneader is preferable, but even with other kneaders, it is preferable to improve the uniform kneadability by repeating the operations of curing and crushing the kneaded material and then melt-kneading again. If a large amount of filler is added at once, the temperature of the softened and melted resin may decrease, so the raw material of the composite material should be heated to an appropriate temperature with a heater or the like before being added to the kneader. May be.

  Further, if the thermoplastic resin is heated for a long time in a molten state, the original physical properties of the resin may be impaired. Therefore, it is preferable to complete the kneading in a short time after sufficiently melting. According to the experiments of the present inventors, it has been found that the time from melting to completion of kneading is preferably about 5 to 30 minutes. However, the optimum time varies depending on the heating temperature and the physical properties of the thermoplastic resin. Should be obtained by experimentation.

  After sufficient kneading, the kneaded product is taken out and crushed into an appropriate size, for example, a granule, piece or lump having a size of 3 mm to 40 mm on one side to obtain an intermediate piece.

  When the intermediate piece is thus obtained, the specific molding method shown in FIGS. 8 and 9 is adopted, the core material (a) is molded, the method of FIG. 5 or 6 is adopted, and the fiber net (b) and An outer layer (c) is formed to produce a cement board.

  In FIG. 8, first, in (a), a thermoforming table having a mold frame on the upper surface corresponding to the thickness to be molded is prepared. Next, in (b), an intermediate piece measured so as to correspond to the volume of the molded core is introduced. At this time, since the crushing intermediate piece easily protrudes from the mold, a homing frame may be inserted along the inner frame of the mold. Then, the intermediate piece is spread evenly (c). Thereafter, heating press is performed (d). When the molding is completed, as shown in FIG. 9, the upper heating molding table is opened (e), and the molded product is taken out from the mold after cooling (f). Then, the protruding ear part is cut to produce a core material (j).

  As a preferred thermoplastic resin, 15 to 20% by weight of polypropylene is blended with an elastomer of 5% by weight or less, and 80 to 75% by weight of a filler in which aluminum hydroxide is blended with 10% by weight or less of magnesium hydroxide is blended. The same glass fiber net is laid on a core material of 3 to 10 mm thickness, which is formed by heating and integrally molding an intermediate piece obtained by kneading the two materials almost uniformly and crushing the solidified composite material to an average particle size of about 25 mm, and cement layer It was confirmed that those having formed had physical properties that passed the 60-minute fire resistance test.

It is a typical sectional view of the fireproof building material (cement board) of the 1st example concerning the present invention. It is typical sectional drawing of the fireproof building material (cement board) of 2nd Example which concerns on this invention. It is typical sectional drawing of the semi-finished product of the fireproof building material (cement board) of 1st Example which concerns on this invention. It is typical sectional drawing of the semi-finished product of the fireproof building material (cement board) of 2nd Example which concerns on this invention. It is a schematic diagram which shows the manufacturing method of the fireproof building material (cement board) of 1st Example which concerns on this invention. It is a schematic diagram which shows the modification of the manufacturing method of the fireproof building material (cement board) of 1st Example which concerns on this invention. It is a schematic diagram which shows the manufacturing method of the fireproof building material (cement board) of 2nd Example which concerns on this invention. It is a schematic diagram which shows the specific manufacturing method of the core material of the fireproof building material (cement board) of 1st Example which concerns on this invention. It is a schematic diagram which shows the process following FIG. It is a schematic diagram which shows the continuous manufacturing method of the refractory building material (cement board) of 1st Example which concerns on this invention. It is a schematic diagram which shows the continuous manufacturing method of the fireproof building material (cement board) of 2nd Example which concerns on this invention. It is a partially exploded perspective view which shows the construction example of the fireproof building material which concerns on this invention.

Claims (10)

  (A-1) a composite resin sheet formed by heat compression molding a composite chip comprising 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin or (a-2) 15 to 30 of a thermoplastic resin A core material (a) composed of a composite mortar sheet formed by mixing a composite chip comprising 85 to 70% by weight of a hydrated metal compound with respect to weight% as a aggregate in a wall material such as cement or gypsum; An intermediate layer (b) comprising a fiber net attached to both surfaces of the core material and sandwiching the core material, and an inorganic material comprising a cement, mortar or gypsum composition formed on one or both surfaces of the core material via the fiber net A fireproof building material comprising an outer layer (c) composed of a fireproof layer, having no weight loss of 30% or more in a nonflammable test, and having no core collapse in a 60 minute fireproof test.   The composite material in which the composite resin sheet (a-1) was melt-kneaded and solidified by adding 85 to 70% by weight of a hydrated metal compound to 15 to 30% by weight of the thermoplastic resin was once crushed. The refractory building material according to claim 1, which is a composite material formed by post-heat compression molding.   An inorganic refractory layer made of a cement, mortar or gypsum composition, wherein the outer layer (c) is a composite chip formed by mixing 85 to 70% by weight of a hydrated metal compound with 15 to 30% by weight of a thermoplastic resin. The fireproof building material according to claim 1.   The composite chip is a composite material obtained by crushing a composite material obtained by melting and kneading a composition obtained by adding 85 to 70% by weight of a hydrated metal compound to 15 to 30% by weight of a thermoplastic resin. Item 3. A fireproof building material according to item 3.   The composite material is composed of natural or synthetic fibers added to a composition in which 85 to 70% by weight of a hydrated metal compound is added to 15 to 30% by weight of a thermoplastic resin. The fireproof building material according to claim 3, which is a composite material.   The refractory building material according to claim 1, wherein the hydrated metal compound comprises one or more of aluminum hydroxide, magnesium hydroxide or calcium hydroxide.   (A-1) a composite resin sheet formed by heat compression molding a composite chip comprising 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin or (a-2) 15 to 30 of a thermoplastic resin A core material (a) composed of a composite mortar sheet formed by mixing a composite chip comprising 85 to 70% by weight of a hydrated metal compound with respect to weight% as a aggregate in a wall material such as cement or gypsum; A semi-finished product for 60-minute refractory building materials comprising an intermediate layer (b) made of glass fiber net attached to both sides of the core material and sandwiching the core material. A composite material obtained by solidifying a powdered or granular composition containing 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin by shearing and solidifying the powder is approximately 30 mmφ or less. Crushing to produce an intermediate piece,
The step of throwing the crushing intermediate piece into a mold frame arranged on the thermoforming surface, pressing it into the mold frame from above with the thermoforming surface, and fusing and forming a composite resin sheet;
Attaching a fiber net to both sides of the composite heat-resistant sheet via an adhesive;
A method for producing a 60-minute refractory building material comprising a step of applying a cement, mortar, or gypsum layer to a glass fiber net surface and drying. A composite material obtained by solidifying a powdered or granular composition containing 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin by shearing and solidifying the powder is approximately 30 mmφ or less. Crushing to produce an intermediate piece,
Place the fiber net on the heat forming surface, put the above crushing intermediate piece into the mold frame that is placed on the upper and lower sides, attach the fiber net on the upper surface, and form the mold on the heat forming surface from above A step of forming a composite heat-resistant sheet that is pressed into the molten intermediate piece and the front and back surfaces of the intermediate piece are sandwiched between fiber nets;
A method for producing a 60-minute refractory building material comprising a step of applying a cement, mortar or gypsum layer to a fiber net surface and drying it. A composite material obtained by crushing a powdered or granular composition containing 85 to 70% by weight of a hydrated metal compound with respect to 15 to 30% by weight of a thermoplastic resin, shearing, kneading, and solidifying the composite material is obtained by crushing the composite bone A process of manufacturing the material;
A fiber net is arranged on the molding surface, and a mortar composition mixed with an inorganic refractory material such as cement or gypsum is used as an aggregate on the crushed intermediate piece, and a glass fiber net is further placed on the top surface of the mortar composition. 60 minutes characterized by comprising a step of attaching, pressing from above, extruding the composition somewhat outward from the fiber net, forming a cement, mortar or gypsum layer on the glass fiber net surface and drying Manufacturing method for fireproof building materials.

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