JP2020152809A - Fire-resistant molding - Google Patents

Abstract

To provide a fire-resistant molding which can improve workability that is arranged in a space in a partition through part.SOLUTION: A fire-resistant molding 11 includes a foam 12 containing a polymer component composed of rubber or a thermoplastic resin, thermally-expansible graphite, a flame retardant and a plasticizer. Asker C hardness of the fire-resistant molding 11 is in a range of 10 or more and 30 or less. The fire-resistant molding 11 preferably further has a non-woven fabric layer 13 provided on an outer surface (for example, first outer surface S1) of the foam 12. The foam 12 has a skin layer and a non-skin layer, at least one outer surface of the first outer surface S1 and the second outer surface S2 is formed of the skin layer, and a connection outer surface S3 is preferably formed of the non-skin layer.SELECTED DRAWING: Figure 1

Description

The present invention relates to a refractory molded article.

Conventionally, there is known a structure in which an insertion member such as a cable is inserted into a partition penetrating portion formed on a wall, a floor, or the like. A fireproof block may be arranged between such a compartment penetrating portion and the insertion member (see Patent Document 1). The refractory block thermally expands between the inner peripheral surface of the compartment penetrating portion and the insertion member in the event of a fire, thereby suppressing the diffusion of flames, smoke, etc. through the compartment penetrating portion.

Japanese Unexamined Patent Publication No. 2012-081175

In a refractory molded body such as the above-mentioned refractory block, for example, when the space in the compartment penetrating portion formed on the wall, floor, etc. is relatively narrow, the work of arranging the refractory molded body in the space in the compartment penetrating portion. There was a risk that the sex would deteriorate.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a refractory molded product capable of improving workability for arranging in a space in a compartment penetrating portion.

The fire-resistant molded product that solves the above problems is a fire-resistant molded product containing a polymer component made of rubber or a thermoplastic resin, a heat-expandable graphite, a flame retardant, and a foam containing a plasticizer, and has an Asker C hardness. Is in the range of 10 or more and 30 or less.

According to this configuration, since the refractory molded body has flexibility with an Asker C hardness of 30 or less, the refractory molded body can be easily compression-deformed. By temporarily compressing and deforming the refractory molded body in this way, the refractory molded body can be easily inserted into the space inside the compartment penetrating portion.

The refractory molded product preferably further includes a non-woven fabric layer provided on the outer surface of the foam.
According to this configuration, the non-woven fabric layer enhances the sliding property of the refractory molded product, so that the non-woven fabric layer can be more easily inserted into the space inside the section penetrating portion.

In the refractory molded product, the outer surface of the foam is the first outer surface, the second outer surface located on the opposite side of the first outer surface, the first outer surface, and the second outer surface. May have a connection outer surface to connect to.

For example, the foam can be constructed as described above.
The fire-resistant molded body further includes a non-woven fabric layer, and the non-woven fabric layer is at least one non-woven fabric layer of a first non-woven fabric layer provided on the first outer surface and a second non-woven fabric layer provided on the second outer surface. Is preferably included.

According to this configuration, in the refractory molded body, the sliding property of at least one of the first outer surface side and the second outer surface side of the foam can be enhanced. Therefore, for example, the refractory molding is performed in the space inside the compartment penetrating portion. It becomes easy to arrange the bodies one by one.

In the fire-resistant molded body, the foam has a skin layer and a non-skin layer, and at least one outer surface of the first outer surface and the second outer surface is formed from the skin layer. The connection outer surface is preferably formed from the non-skin layer.

According to this configuration, it is possible to suppress deformation in which the outer surface of the foam is curved by the skin layer forming at least one of the first outer surface and the second outer surface. Further, since the non-skin layer forming the connection outer surface is unlikely to be resistant to compressive deformation that brings the first outer surface and the second outer surface closer to each other, it is fire resistant so that the first outer surface and the second outer surface are brought closer to each other. The molded body can be easily compressed and deformed. That is, it is possible to perform compression deformation in a predetermined direction while suppressing unnecessary deformation.

In the fire-resistant molded product, it is preferable that the polymer component contains chloroprene rubber, the flame retardant contains ammonium polyphosphate, and the plasticizer contains a phthalic acid-based plasticizer.

According to the present invention, it is possible to improve the workability of arranging the space in the space penetrating portion.

It is an exploded perspective view which shows the refractory molded article of embodiment.

Hereinafter, embodiments of the refractory molded product will be described with reference to the drawings.
As shown in FIG. 1, the refractory molded body 11 includes a foam 12 and a non-woven fabric layer 13. The refractory molded body 11 is used by arranging it in a space in a compartment penetrating portion formed on a wall, a floor, or the like formed for passing an insertion member such as pipes or cables. In the event of a fire, the heat-expandable graphite contained in the foam 12 expands due to heat, so that a nonflammable expander is formed from the foam 12. With the inflator formed in the compartment penetrating portion in this way, it is possible to suppress the diffusion of smoke and the like through the compartment penetrating portion and to suppress the invasion of fire flames into the compartment penetrating portion.

As shown in FIG. 1, the outer surfaces of the foam 12 are the first outer surface S1, the second outer surface S2 located on the opposite side of the first outer surface S1, the first outer surface S1 and the second outer surface. It has a connection outer surface S3 that connects to S2. Further, the foam 12 has a skin layer and a non-skin layer. The skin layer is a dense layer formed on the outer surface of the foam 12 when the foam 12 is molded. The non-skin layer is a foam layer formed inside the skin layer in the foam 12. A foamed molded product having a skin layer and a non-skin layer can be obtained by a molding method in which a foam composition containing a foaming agent is heated and foamed. The non-skin layer (foam layer) can be exposed by removing the skin layer from the foam molded product by cutting or the like. That is, the outer surface exposed by removing the skin layer becomes the outer surface formed from the non-skin layer (foam layer). The first outer surface S1 and the second outer surface S2 of the foam 12 of the present embodiment are formed from a skin layer. The connecting outer surface S3 of the foam 12 is formed from a non-skin layer.

The non-woven fabric layer 13 is composed of a first non-woven fabric layer 13a provided on the first outer surface S1 of the foam 12 and a second non-woven fabric layer 13b provided on the second outer surface S2 of the foam 12. The non-woven fabric layer 13 contains natural fibers such as cotton, wool and pulp, chemical fibers such as rayon and polyester, and fibers such as mineral fibers and glass fibers. Examples of the shape of the non-woven fabric layer 13 include cloth-like, paper-like, and cotton-like.

The Asker C hardness of the refractory molded product 11 is in the range of 10 or more and 30 or less. When the refractory molded body 11 has an Asker C hardness of less than 10, the refractory molded body 11 is excessively deformed when an external force is applied to the refractory molded body 11, so that the refractory molded body 11 is formed on the insertion member and the wall, floor, or the like. It is inferior in workability when the refractory molded body 11 is arranged between the inner peripheral surface of the opening. On the other hand, when the asker C hardness of the refractory molded body 11 exceeds 30, the refractory molded body 11 is less likely to be deformed, so that the workability when arranging the refractory molded body 11 in the space inside the section penetrating portion is inferior. The ascar C hardness of the refractory molded product 11 is preferably 18 or more. The ascar C hardness of the refractory molded product 11 is preferably 25 or less. Asker C hardness of the refractory molded body 11 conforms to JIS K7312 on the first outer surface S1 side (outer surface of the first non-woven fabric layer 13a) and the second outer surface S2 side (outer surface of the second non-woven fabric layer 13b). It is a value measured by.

Next, the composition of the foam 12 will be described.
The foam 12 contains a polymer component made of rubber or a thermoplastic resin, a heat-expandable graphite, a flame retardant, and a plasticizer. Examples of rubber as a polymer component include natural rubber and synthetic rubber. Examples of the synthetic rubber include diene-based synthetic rubber and non-diene-based synthetic rubber. Examples of the diene-based rubber include styrene-butadiene rubber, isoprene rubber, butadiene rubber, nitrile rubber, and chloroprene rubber. Examples of the non-diene rubber include butyl rubber, ethylene / propylene rubber, ethylene / propylene / diene rubber and the like. The thermoplastic resin preferably has a rubber-like elastic behavior at room temperature, and specific examples thereof include styrene-based, olefin-based, ester-based, urethane-based, amide-based, and vinyl chloride-based thermoplastic resins. .. The polymer component contained in the foam 12 preferably contains chloroprene rubber.

Thermally expandable graphite is a layer of graphite such as scaly graphite in which a chemical substance is inserted. Thermally expandable graphite forms a nonflammable expander when a chemical substance expands due to heat such as a fire. That is, the foam 12 containing the heat-expandable graphite exhibits fire resistance.

The content of the heat-expandable graphite in the foam 12 is preferably in the range of 10 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the polymer component. When the content of the heat-expandable graphite is 10 parts by mass or more, the fire resistance performance of the foam 12 can be further improved. When the content of the heat-expandable graphite is 100 parts by mass or less, the shape of the expanded body after the thermal expansion can be easily maintained.

The content of the heat-expandable graphite in the foam 12 is more preferably 15 parts by mass or more with respect to 100 parts by mass of the polymer component. The content of the heat-expandable graphite in the foam 12 is more preferably 70 parts by mass or less, more preferably 40 parts by mass or less, and most preferably 35 parts by mass with respect to 100 parts by mass of the polymer component. It is as follows.

Examples of the flame retardant include phosphorus-based flame retardants, nitrogen-based flame retardants, inorganic compound-based flame retardants, halogen-based flame retardants, and the like. Examples of the phosphorus-based flame retardant include amine phosphate salt, ammonium polyphosphate, phosphoric acid ester, phosphazene, phosphonic acid ester, metal phosphinic acid salt, and red phosphorus. Examples of the nitrogen-based flame retardant include melamine and melamine cyanurate. Examples of the inorganic compound flame retardant include aluminum hydroxide, magnesium hydroxide, calcium carbonate, zinc borate and the like. Examples of the halogen-based flame retardant include tetrabromobisphenol A and decabromodiphenyl ether. The flame retardant contained in the foam 12 preferably contains ammonium polyphosphate.

The content of the flame retardant in the foam 12 is preferably in the range of 10 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the polymer component. When the content of the flame retardant is 10 parts by mass or more, the shape of the expanded body after thermal expansion can be easily maintained. When the content of the flame retardant is 100 parts by mass or less, the hardness of Ascar C of the refractory molded product 11 can be further lowered.

The content of the flame retardant in the foam 12 is more preferably 20 parts by mass or more, and further preferably 27 parts by mass or more with respect to 100 parts by mass of the polymer component. The content of the flame retardant in the foam 12 is more preferably 70 parts by mass or less, more preferably 50 parts by mass or less, and most preferably 40 parts by mass or less with respect to 100 parts by mass of the polymer component. is there.

Examples of the plasticizer include phthalic acid-based, adipic acid-based, phosphoric acid-based, and trimellitic acid-based plasticizers. Examples of the plasticizer include paraffin-based, naphthenic-based, and aroma-based process oils. The plasticizer contained in the foam 12 preferably contains a phthalic acid-based plasticizer.

The content of the plasticizer in the foam 12 is preferably in the range of 10 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the polymer component. When the content of the plasticizer is 10 parts by mass or more, the hardness of Asker C of the refractory molded product 11 can be further lowered. When the content of the plasticizer is 100 parts by mass or less, the bleeding of the plasticizer from the foam 12 can be suppressed.

The content of the plasticizer in the foam 12 is more preferably 15 parts by mass or more, and further preferably 20 parts by mass or more with respect to 100 parts by mass of the polymer component. The content of the plasticizer in the foam 12 is more preferably 80 parts by mass or less, still more preferably 60 parts by mass or less, based on 100 parts by mass of the polymer component.

The foam 12 may further contain a known filler, anti-aging agent, or the like. Examples of the filler include light calcium carbonate, heavy calcium carbonate, talc, clay, mica, silica, diatomaceous earth, alumina, glass fiber, glass beads, iron oxide, titanium oxide, carbon black and the like. Examples of the antiaging agent include amine-based (amine-ketone-based, aromatic secondary amine-based, etc.), phenol-based (monophenol-based, bisphenol-based, polyphenol-based, etc.), benzimidazole-based, and dithiocarbamate-based. Examples thereof include thiourea-based, hydride-based, organic thioic acid-based, and wax.

Next, a method for manufacturing the refractory molded product 11 will be described.
The method for producing the fire-resistant molded body 11 includes a molding step of obtaining a foamable sheet material by molding the foam composition into a sheet, and a laminating step of laminating a non-woven fabric on the foamable sheet material. The method for manufacturing the fire-resistant molded product 11 is to heat-foam a foamable sheet material (composition for foam) on which a non-woven fabric is laminated to obtain a fire-resistant sheet material in which the non-woven fabric and the foam 12 are bonded. It further includes a step and a cutting step of cutting the obtained fire-resistant sheet material along the direction (thickness direction) in which the non-woven fabric and the foam 12 are laminated.

The foam composition contains a polymer component, a heat-expandable graphite, a flame retardant, and a plasticizer. The foam composition further contains a foaming agent. The foam composition may contain a vulcanizing agent, a vulcanization accelerator, or the like, if necessary. Further, the foam composition may further contain the above-mentioned known filler, anti-aging agent, and the like.

The Asker C hardness of the refractory molded product 11 can be adjusted by changing the content of the foaming agent, expansive graphite, flame retardant, etc. in the composition for the foam.
Further, the foaming rate when forming the foam 12 from the foam composition can be adjusted by changing the content of the foaming agent, the expanding graphite, the flame retardant, etc. in the foam composition. This foaming rate is represented by the following formula (1).

Foaming rate (%) = (A1 / A2-1) x 100 ... (1)
In the above formula (1), A1 indicates the specific gravity of the foam composition, and A2 indicates the specific gravity of the foam 12.

The foaming ratio of the foam 12 is preferably in the range of 50% or more and 500% or less from the viewpoint of facilitating the control of foaming. The foaming rate of the foam 12 is more preferably 100% or more. The foaming rate of the foam 12 is more preferably 250% or less, still more preferably 150% or less.

Examples of the foaming agent include a thermal decomposition type chemical foaming agent and a physical foaming agent. Examples of the pyrolytic chemical foaming agent include azodicarbonamide, dinitrosopentamethylenetetramine, p, p'-oxybisbenzenesulfonyl hydrazide, sodium hydrogencarbonate and the like. Examples of the physical foaming agent include hydrocarbons such as propane and butane, nitrogen gas, oxygen gas, carbon dioxide gas and the like. Further, examples of other physical foaming agents include heat-expandable microcapsules in which low-boiling hydrocarbons such as pentane and hexane are encapsulated in a shell made of a thermoplastic resin.

The content of the foaming agent in the composition for foam is preferably in the range of 1 part by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the polymer component. In this case, the Asker C hardness of the refractory molded body 11 can be easily adjusted within the above range.

The content of the foaming agent in the composition for foam is more preferably 5 parts by mass or more, and further preferably 10 parts by mass or more with respect to 100 parts by mass of the polymer component.
Examples of the vulcanizing agent include organic peroxides, sulfur-based vulcanizing agents, zinc oxide and the like. The content of the vulcanizing agent in the composition for foam is preferably in the range of 1 part by mass or more and 15 parts by mass or less with respect to 100 parts by mass of the polymer component. When the content of the vulcanizing agent is 1 part by mass or more, the vulcanization of the polymer component is promoted, so that the foam 12 can be easily molded. When the content of the vulcanizing agent is 15 parts by mass or less, the hardness of Asker C of the refractory molded product 11 can be further lowered.

The content of the vulcanizing agent in the composition for foam is more preferably 2 parts by mass or more, and further preferably 3 parts by mass or more with respect to 100 parts by mass of the polymer component. The content of the vulcanizing agent in the composition for foam is more preferably 12 parts by mass or less, still more preferably 10 parts by mass or less, based on 100 parts by mass of the polymer component.

Examples of the vulcanization accelerator include stearic acid, fatty acid derivatives, magnesium oxide, thiazole type, sulfenamide type, thiuram type, aldehyde ammonia type, aldehyde amine type, guanidine type, thiourea type and the like. The content of the vulcanization accelerator in the composition for foam is preferably in the range of 0.1 part by mass or more and 15 parts by mass or less with respect to 100 parts by mass of the polymer component. When the content of the vulcanization accelerator is 0.1 parts by mass or more, the vulcanization of the polymer component is promoted, so that the foam 12 can be easily molded. When the content of the vulcanization accelerator is 15 parts by mass or less, the asker C hardness of the refractory molded product 11 can be further lowered.

The content of the vulcanization accelerator in the composition for foam is more preferably 0.5 parts by mass or more, and further preferably 1 part by mass or more with respect to 100 parts by mass of the polymer component. The content of the vulcanization accelerator in the composition for foam is more preferably 12 parts by mass or less, still more preferably 10 parts by mass or less, based on 100 parts by mass of the polymer component.

The foam composition can be obtained by kneading the above-mentioned raw materials using a kneader or the like.
Next, a molding step of obtaining a foamable sheet material from the foam composition is performed. Examples of the molding method used in the molding step include a roll molding method, a press molding method, an injection molding method and the like. From the viewpoint of increasing productivity, it is preferable to use a roll molding method in the molding step.

Next, in the laminating step, the non-woven fabric is laminated on the front and back surfaces of the foamable sheet material. Subsequently, in the foaming step, the foamable sheet material on which the non-woven fabric is laminated is placed between a set of steel plates having a predetermined interval, and then the foamable sheet material is heated and foamed. By this foaming step, a foam 12 having a predetermined thickness dimension is formed, and a non-woven fabric is bonded to the front and back surfaces of the foam 12, so that a refractory sheet material can be obtained. The foaming step may be performed using a molding die having a cavity having a predetermined shape. The heating temperature and heating time in the foaming step can be set according to the type of foaming agent.

The entire outer surface of the foam 12 in the obtained refractory sheet material is formed of a skin layer. In the cutting step, by cutting the refractory sheet material as described above, a foam 12 having a cut surface in which the foam layer is exposed, that is, a connection outer surface S3 formed from a non-skin layer is obtained. For example, by cutting the refractory sheet material into a quadrangular shape in a plan view, all of the four connection outer surfaces S3 in the foam 12 can be formed from the non-skin layer. By cutting the refractory sheet material by the cutting step in this way, the refractory molded body 11 having a predetermined size can be obtained. For example, it is possible to obtain a large number of refractory molded bodies 11 from one refractory sheet material.

Next, an example of how to use the refractory molded body 11 will be described together with the action.
First, the fire-resistant molded body 11 as the lowermost stage is arranged along the inner bottom surface of the section penetrating portion formed on the wall. Next, insertion members such as pipes and cables are arranged at predetermined positions on the arranged refractory molded bodies 11. Subsequently, the refractory molded body 11 is further arranged in the space inside the section penetrating portion.

At this time, since the refractory molded body 11 has a flexibility of Asker C hardness of 30 or less, the refractory molded body 11 can be easily compressed and deformed. The refractory molded body 11 of the present embodiment can be easily compressed and deformed by pressing the first outer surface S1 and the second outer surface S2 of the foam 12 in a direction close to each other. By temporarily compressing and deforming the refractory molded body 11 in this way, the refractory molded body 11 can be easily inserted into the space inside the compartment penetrating portion. The refractory molded body 11 is restored to its original shape by releasing the pressing.

By repeating the work of compressing and deforming the refractory molded body 11 and arranging the refractory molded body 11 in the space inside the section penetrating portion, a laminated structure in which a plurality of refractory molded bodies 11 are stacked so as to be in close contact with each other is formed. Can be done. If there is a gap between the refractory molded body 11 and the insertion member or between the refractory molded body 11 and the inner peripheral surface of the section penetrating portion, a filling material such as a putty material is further used to form the gap. May be filled.

Next, the action and effect of this embodiment will be described.
(1) The refractory molded body 11 includes a foam 12 containing a polymer component made of rubber or a thermoplastic resin, a heat-expandable graphite, a flame retardant, and a plasticizer. The Asker C hardness of the refractory molded product 11 is in the range of 10 or more and 30 or less.

According to this configuration, since the refractory molded body 11 has a flexibility of Asker C hardness of 30 or less, the refractory molded body 11 can be formed by utilizing the deformation of the refractory molded body 11 as described above. It can be easily inserted into the space inside the compartment penetration portion. Therefore, it is possible to improve the workability of arranging the space in the space penetrating portion.

Further, the weight of the refractory molded body 11 can be reduced by forming the main body portion that thermally expands in the refractory molded body 11 from the foam 12 containing bubbles. This reduces the work load of transporting the plurality of refractory molded bodies 11 and arranging the plurality of refractory molded bodies 11 in the space of the section penetrating portion.

(2) The refractory molded body 11 further includes a non-woven fabric layer 13 provided on the outer surface of the foam 12. In this case, the non-woven fabric layer 13 enhances the sliding property of the refractory molded body 11, so that it can be more easily inserted into the space inside the section penetrating portion. Therefore, it is possible to further improve the workability of arranging the space in the space penetrating portion.

(3) The non-woven fabric layer 13 includes at least one non-woven fabric layer 13 of the first non-woven fabric layer 13a provided on the first outer surface S1 of the foam 12 and the second non-woven fabric layer 13b provided on the second outer surface S2. Is preferable. In this case, in the fire-resistant molded product 11, the sliding property of at least one of the first outer surface S1 side and the second outer surface S2 side of the foam 12 can be enhanced, so that, for example, the space inside the compartment penetrating portion has fire resistance. It becomes easy to sequentially stack and arrange the molded bodies 11. Therefore, it is possible to improve the workability of arranging a plurality of refractory molded bodies 11 in a space in the section penetrating portion.

(4) The foam 12 has a skin layer and a non-skin layer, and at least one outer surface of the first outer surface S1 and the second outer surface S2 is formed from the skin layer, and the connecting outer surface S3 is It is formed from a non-skin layer. In this case, it is possible to suppress deformation in which the outer surface of the foam 12 is curved by the skin layer forming at least one of the first outer surface S1 and the second outer surface S2. Further, since the non-skin layer forming the connection outer surface S3 is unlikely to be resistant to compressive deformation that brings the first outer surface S1 and the second outer surface S2 closer to each other, the first outer surface S1 and the second outer surface S2 are combined. The refractory molded body 11 can be easily compressed and deformed so as to be close to each other. That is, it is possible to perform compression deformation in a predetermined direction while suppressing unnecessary deformation. Therefore, it is possible to further improve the workability of arranging the space in the space penetrating portion.

(Change example)
The above embodiment may be modified as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

Any outer surface of the first outer surface S1, the second outer surface S2, and the connection outer surface S3 of the foam 12 can be formed from the skin layer. Further, any of the outer surfaces of the first outer surface S1, the second outer surface S2, and the connection outer surface S3 of the foam 12 can be formed from the non-skin layer.

The non-woven fabric layer 13 can be provided on at least one outer surface of the first outer surface S1, the second outer surface S2, and the connection outer surface S3.
-The non-woven fabric layer 13 can be omitted.

The refractory molded body 11 has a quadrangular shape in a plan view, but for example, the shape in a plan view can be changed to a polygonal shape other than the quadrangular shape. Further, the overall shape of the refractory molded body 11 may be changed to, for example, a cylindrical shape, a polygonal column shape, a conical shape, a polygonal thrust shape, or the like.

The technical ideas that can be grasped from the above embodiments and modified examples are described below.
The content of the heat-expandable graphite in the foam is in the range of 10 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the polymer component, and the content of the flame retardant is the above. A fire-resistant molded product in the range of 10 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the polymer component.

-A composition for a foam for molding a foam having fire resistance, which comprises a polymer component made of rubber or a thermoplastic resin, a heat-expandable graphite, a flame retardant, a plasticizer, a foaming agent, and a vulcanizing agent. Composition for foam containing.

Next, Examples and Comparative Examples will be described.
(Examples 1 to 10 and Comparative Examples 1 to 5)
The raw materials shown in Tables 1 and 2 were kneaded with a kneader to prepare a foam composition for each example. The unit of the numerical value indicating the blending amount of the raw materials in Tables 1 and 2 is the mass part. In each example, chloroprene rubber as a polymer component, zinc oxide as a vulcanizing agent, stearic acid as a vulcanization accelerator (1), magnesium oxide as a vulcanization accelerator (2), and p, p'-oxybisbenzene as a foaming agent. Vulcanized hydrazide, ammonium polyphosphate as a flame retardant, phthalic acid plasticizer as a plasticizer, and carbon black as a filler were used.

Using the obtained composition for foam, the above-mentioned molding step, laminating step, foaming step, and cutting step were sequentially performed to obtain a refractory molded product of each example. In the laminating process, a polyester spunbonded non-woven fabric was used. The conditions of the foaming step were 200 ° C. for 20 minutes.

(Measurement of Asker C hardness)
A sample of the refractory molded product of each example (thickness 10 mm × length 50 mm × width 50 mm) was measured using an Asker rubber hardness tester C type in accordance with JIS K7312. The results are shown in Tables 1 and 2.

(Foaming rate)
The foaming rate of the refractory molded product of each example was calculated by the above formula (1). The results are shown in Tables 1 and 2.

(Evaluation of workability)
The workability when arranging the refractory molded article of each example together with the insertion member in the section penetrating portion was evaluated. The compartment penetration portion used in the evaluation of this workability is formed so as to penetrate the wall horizontally. The shape of the compartment penetrating portion is quadrangular when viewed from the wall surface direction, the width dimension of the compartment penetrating portion is 300 mm, the height dimension is 150 mm, and the depth dimension is 80 mm. The outer diameter dimension of the insertion member is 100 mm, and has a length dimension larger than the depth dimension of the section penetrating portion. The width dimension of the refractory molded product is 100 mm, the height dimension (thickness dimension) is 40 mm, and the depth dimension is 80 mm.

In the evaluation of workability, first, the three refractory molded bodies at the bottom were arranged along the inner bottom surface of the section penetrating portion, and then the insertion member was placed on the central refractory molded body among the three. .. Next, refractory molded bodies were arranged on both sides of the insertion member. Finally, three refractory molded bodies at the top were arranged along the ceiling surface of the section penetrating portion. The three refractory molded bodies at the top were arranged by compressing and deforming them in the thickness direction of the refractory molded bodies and then inserting them into the section penetrating portion. Of this series of operations, the work of arranging the top three refractory molded bodies in the compartment penetration portion has very good workability (◎), good workability (○), and slightly inferior workability. Judgment was made in three stages of (Δ).

Regarding the refractory molded article of each example, the evaluation result that the workability was very good or the workability was good was obtained. On the other hand, the asker C hardness of the refractory molded articles of Comparative Examples 1, 3 and 5 exceeds 30, and the asker C hardness of the refractory molded articles of Comparative Examples 2 and 4 is less than 10. Therefore, the evaluation of the workability of the refractory molded product of each comparative example was inferior to that of each example.

11 ... Fire resistant molded body, 12 ... Foam, 13 ... Non-woven fabric layer, 13a ... First non-woven fabric layer, 13b ... Second non-woven fabric layer, S1 ... First outer surface, S2 ... Second outer surface, S3 ... Connection outer surface ..

Claims (6)

A refractory molded product comprising a polymer component made of rubber or a thermoplastic resin, a heat-expandable graphite, a flame retardant, and a foam containing a plasticizer.
A refractory molded product having an Asker C hardness in the range of 10 or more and 30 or less. The refractory molded product according to claim 1, further comprising a non-woven fabric layer provided on the outer surface of the foam. The outer surface of the foam is a first outer surface, a second outer surface located on the opposite side of the first outer surface, and a connection outer surface connecting the first outer surface and the second outer surface. The refractory molded product according to claim 1, which has the above. 3. The non-woven fabric layer further includes a non-woven fabric layer, which is at least one of a first non-woven fabric layer provided on the first outer surface and a second non-woven fabric layer provided on the second outer surface. The fire-resistant molded body described. The foam has a skin layer and a non-skin layer, the first outer surface and at least one outer surface of the second outer surface are formed from the skin layer, and the connection outer surface is the non-skin layer. The fire-resistant molded body according to claim 3 or 4, which is formed from a skin layer. The fire-resistant molded product according to any one of claims 1 to 5, wherein the polymer component contains chloroprene rubber, the flame retardant contains ammonium polyphosphate, and the plasticizer contains a phthalic acid-based plasticizer. ..