JP7248288B2 - refractory molding - Google Patents

Description

The present invention relates to refractory moldings.

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

JP 2012-081175 A

For example, when the space inside the section penetration formed in the wall, floor, etc. is relatively narrow, the work of arranging the fire-resistant article in the space inside the section penetration is There was a risk of deterioration.

The present invention has been made in view of these circumstances, and its object is to provide a fire-resistant molded article that can improve the workability of arranging it in the space inside the partition penetration.

A fire-resistant molded article for solving the above problems is a fire-resistant molded article comprising a foam containing a polymer component made of rubber or a thermoplastic resin, thermally expandable graphite, a flame retardant, and a plasticizer, and having an Asker C hardness. is in the range of 10 or more and 30 or less.

According to this configuration, since the fire-resistant molded article has flexibility with an Asker C hardness of 30 or less, the fire-resistant molded article can be easily compressed and deformed. By temporarily compressing and deforming the refractory molded body in this way, it becomes possible to easily insert the refractory molded body into the space inside the compartment penetration portion.

It is preferable that the fire-resistant molded article further includes a nonwoven fabric layer provided on the outer surface of the foam.
According to this configuration, the slidability of the fire-resistant molded body is enhanced by the non-woven fabric layer, so that it can be more easily inserted into the space inside the compartment penetration portion.

In the refractory molded article, the outer surface of the foam includes a first outer surface, a second outer surface opposite to the first outer surface, and the first outer surface and the second outer surface. and a connecting outer surface that connects the

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

According to this configuration, in the fire-resistant molded article, the sliding property of at least one of the first outer surface side and the second outer surface side of the foam can be improved. It becomes easier to place the bodies one on top of the other.

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

According to this configuration, deformation in which the outer surface of the foam is curved can be suppressed by the skin layer forming at least one of the first outer surface and the second outer surface. In addition, since the non-skin layer forming the connection outer surface is less likely to resist compression deformation that brings the first outer surface and the second outer surface closer together, the non-skin layer can bring the first outer surface closer to the second outer surface. The compact can be easily compressed and deformed. That is, it is possible to compress and deform in a predetermined direction while suppressing unnecessary deformation.

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

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the workability|operativity which arrange|positions in the space in a division penetration part.

It is an exploded perspective view showing a refractory molding of an embodiment.

Hereinafter, embodiments of the refractory molding will be described with reference to the drawings.
As shown in FIG. 1, the fire-resistant molding 11 comprises a foam 12 and a nonwoven fabric layer 13 . The refractory molded body 11 is used by arranging it in a space inside a compartment penetrating portion formed in a wall, a floor, or the like, through which insertion members such as pipes and cables are passed. In the event of a fire, the thermally expandable graphite contained in the foam 12 expands due to heat, forming a nonflammable expanded body from the foam 12 . The inflatable body formed in the partition penetration portion in this way can suppress the diffusion of smoke or the like through the partition penetration portion, and can suppress the penetration of fire flames into the partition penetration portion.

As shown in FIG. 1, the outer surface of the foam 12 includes a first outer surface S1, a second outer surface S2 opposite the first outer surface S1, and a first outer surface S1 and the second outer surface S1. and a connecting outer surface S3 connecting with S2. Also, the foam 12 has a skin layer and a non-skin layer. A skin layer is a dense layer formed on the outer surface of the foam 12 when the foam 12 is molded. A non-skin layer is a foam layer formed inside the skin layer in the foam 12 . A foam-molded article having a skin layer and a non-skin layer is obtained by a molding method in which a foam composition containing a foaming agent is heated and foamed. A non-skin layer (foamed layer) can be exposed by removing the skin layer from the foamed molding 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). 1st outer surface S1 and 2nd outer surface S2 of the foam 12 of this embodiment are formed from the skin layer. The connecting outer surface S3 of the foam 12 is formed from a non-skin layer.

The nonwoven fabric layer 13 is composed of a first nonwoven fabric layer 13 a provided on the first outer surface S<b>1 of the foam 12 and a second nonwoven fabric layer 13 b provided on the second outer surface S<b>2 of the foam 12 . The nonwoven fabric layer 13 includes fibers such as natural fibers such as cotton, wool and pulp, chemical fibers such as rayon and polyester, mineral fibers and glass fibers. Examples of the shape of the nonwoven fabric layer 13 include cloth-like, paper-like, cotton-like, and the like.

The Asker C hardness of the refractory molding 11 is within the range of 10 or more and 30 or less. When the Asker C hardness of the refractory molded body 11 is less than 10, the refractory molded body 11 is excessively deformed when an external force acts on the refractory molded body 11. Therefore, the refractory molded body 11 is formed on the insertion member, wall, floor, etc. It is inferior in workability when arranging the fire-resistant molding 11 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 difficult to deform, resulting in inferior workability when arranging the refractory molded body 11 in the space inside the section penetration portion. The Asker C hardness of the refractory molding 11 is preferably 18 or more. The Asker C hardness of the refractory molding 11 is preferably 25 or less. The Asker C hardness of the fire-resistant molding 11 conforms to JIS K7312 on the first outer surface S1 side (the outer surface of the first nonwoven fabric layer 13a) and the second outer surface S2 side (the outer surface of the second nonwoven fabric layer 13b). It is a value measured by

Next, the composition of foam 12 will be described.
The foam 12 contains a polymer component made of rubber or thermoplastic resin, thermally expandable graphite, flame retardant, and plasticizer. Rubbers that are polymer components include natural rubbers and synthetic rubbers. Examples of synthetic rubbers include diene synthetic rubbers and non-diene synthetic rubbers. Examples of diene rubber include styrene-butadiene rubber, isoprene rubber, butadiene rubber, nitrile rubber, chloroprene rubber, and the like. Non-diene rubbers include, for example, butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, and the like. The thermoplastic resin preferably exhibits rubber-like elasticity at room temperature, and specific examples include thermoplastic resins such as styrene, olefin, ester, urethane, amide, and vinyl chloride. . The polymer component contained in the foam 12 preferably contains chloroprene rubber.

Thermally expandable graphite is made by inserting a chemical substance into a layer of graphite such as flake graphite. Thermally expandable graphite forms a non-combustible expandable body when a chemical substance expands due to heat such as fire. That is, the foam 12 containing thermally expandable graphite exhibits fire resistance.

The content of the thermally 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 thermally expandable graphite is 10 parts by mass or more, the fire resistance of the foam 12 can be further enhanced. When the content of the thermally expandable graphite is 100 parts by mass or less, the shape of the expandable body after thermal expansion is easily maintained.

More preferably, the content of the thermally expandable graphite in the foam 12 is 15 parts by mass or more with respect to 100 parts by mass of the polymer component. The content of thermally expandable graphite in the foam 12 is more preferably 70 parts by mass or less, still 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 below.

Examples of flame retardants include phosphorus flame retardants, nitrogen flame retardants, inorganic compound flame retardants, and halogen flame retardants. Phosphorus-based flame retardants include, for example, amine phosphate, ammonium polyphosphate, phosphate, phosphazene, phosphonate, metal phosphinate, and red phosphorus. Examples of nitrogen-based flame retardants include melamine and melamine cyanurate. Examples of inorganic compound flame retardants include aluminum hydroxide, magnesium hydroxide, calcium carbonate, and zinc borate. Examples of halogen-based flame retardants 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 is easily maintained. When the content of the flame retardant is 100 parts by mass or less, the Asker C hardness of the fire-resistant molding 11 can be made lower.

The content of the flame retardant in the foam 12 is more preferably 20 parts by mass or more, still more 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, still 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. be.

Examples of plasticizers include phthalic acid-based, adipic acid-based, phosphoric acid-based, and trimellitic acid-based plasticizers. Examples of plasticizers include process oils such as paraffinic, naphthenic and aromatic oils. The plasticizer contained in the foam 12 preferably contains a phthalate-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 Asker C hardness of the refractory molding 11 can be made lower. When the content of the plasticizer is 100 parts by mass or less, 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, still more 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 with respect to 100 parts by mass of the polymer component.

The foam 12 may further contain known fillers, anti-aging agents, and the like. Examples of fillers 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. Anti-aging agents include, for example, amine-based (amine-ketone-based, aromatic secondary amine-based, etc.), phenol-based (monophenol-based, bisphenol-based, polyphenol-based, etc.), benzimidazole-based, dithiocarbamate-based, Thiourea-based, phosphorous acid-based, organic thioacid-based, wax and the like can be mentioned.

Next, a method for manufacturing the refractory molding 11 will be described.
The method for producing the fire-resistant molded article 11 includes a forming step of forming a foam composition into a sheet to obtain a foamable sheet material, and a lamination step of laminating a non-woven fabric on the foamable sheet material. The method for producing the fire-resistant molded body 11 includes heating and foaming a foamable sheet material (foam composition) laminated with nonwoven fabric to obtain a fire-resistant sheet material in which the nonwoven fabric and the foam 12 are bonded. and a cutting step of cutting the obtained refractory sheet material along the direction (thickness direction) in which the nonwoven fabric and the foam 12 are laminated.

The foam composition contains a polymer component, thermally expandable graphite, a flame retardant, and a plasticizer. The foam composition further contains a blowing agent. The foam composition may contain a vulcanizing agent, a vulcanization accelerator, and the like, if necessary. In addition, the foam composition may further contain the above-described known fillers, anti-aging agents, and the like.

The Asker C hardness of the fire-resistant molding 11 can be adjusted by changing the contents of the foaming agent, expandable graphite, flame retardant, and the like in the foam composition.
Also, by changing the content of the foaming agent, expansive graphite, flame retardant, etc. in the foam composition, the foaming ratio when forming the foam 12 from the foam composition can be adjusted. This expansion rate is represented by the following formula (1).

Foaming ratio (%) = (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 .

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

Examples of foaming agents include thermal decomposition chemical foaming agents and physical foaming agents. Thermal decomposition type chemical blowing agents include, for example, azodicarbonamide, dinitrosopentamethylenetetramine, p,p'-oxybisbenzenesulfonylhydrazide, sodium hydrogen carbonate and the like. Examples of physical foaming agents include hydrocarbons such as propane and butane, nitrogen gas, oxygen gas, carbon dioxide gas, and the like. Other physical foaming agents include, for example, thermally expandable microcapsules in which a low boiling point hydrocarbon such as pentane or hexane is enclosed in a shell made of a thermoplastic resin.

The content of the foaming agent in the foam composition 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 molding 11 can be easily adjusted within the range described above.

The content of the foaming agent in the foam composition is more preferably 5 parts by mass or more, still more preferably 10 parts by mass or more, relative to 100 parts by mass of the polymer component.
Examples of vulcanizing agents include organic peroxides, sulfur vulcanizing agents, zinc oxide and the like. The content of the vulcanizing agent in the foam composition 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 accelerated, making it easier to mold the foam 12 . When the content of the vulcanizing agent is 15 parts by mass or less, the Asker C hardness of the refractory molding 11 can be made lower.

The content of the vulcanizing agent in the foam composition is more preferably 2 parts by mass or more, still more preferably 3 parts by mass or more, relative to 100 parts by mass of the polymer component. The content of the vulcanizing agent in the foam composition is more preferably 12 parts by mass or less, still more preferably 10 parts by mass or less, relative to 100 parts by mass of the polymer component.

Examples of vulcanization accelerators include stearic acid, fatty acid derivatives, magnesium oxide, thiazole-based, sulfenamide-based, thiuram-based, aldehyde-ammonium-based, aldehyde-amine-based, guanidine-based, and thiourea-based accelerators. The content of the vulcanization accelerator in the foam composition is preferably in the range of 0.1 parts 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, vulcanization of the polymer component is accelerated, making it easier to mold the foam 12 . When the content of the vulcanization accelerator is 15 parts by mass or less, the Asker C hardness of the refractory molding 11 can be made lower.

The content of the vulcanization accelerator in the foam composition is more preferably 0.5 parts by mass or more, still more preferably 1 part by mass or more, relative to 100 parts by mass of the polymer component. The content of the vulcanization accelerator in the foam composition is more preferably 12 parts by mass or less, still more preferably 10 parts by mass or less, relative to 100 parts by mass of the polymer component.

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

Next, in the lamination step, nonwoven fabrics are laminated on the front and back surfaces of the foamable sheet material. Subsequently, in the foaming step, the foamable sheet material laminated with the nonwoven fabric is placed between a set of steel plates having a predetermined interval, and then the foamable sheet material is heated and foamed. Through this foaming process, a foam 12 having a predetermined thickness is formed, and non-woven fabrics are joined to the front and rear surfaces of the foam 12, respectively, to obtain a fire-resistant sheet material. The foaming step may be performed using a molding die having a cavity of 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, the refractory sheet material is cut as described above to obtain the foam 12 having the cut surface where the foam layer is exposed, ie, the connecting outer surface S3 formed from the non-skin layer. For example, by cutting a refractory sheet material into a rectangular shape in plan view, all of the four connection outer surfaces S3 of the foam 12 can be formed from non-skin layers. By cutting the fire-resistant sheet material by the cutting process in this manner, the fire-resistant molded body 11 having a predetermined size is obtained. For example, it is possible to obtain a large number of fire-resistant moldings 11 from one fire-resistant sheet material.

Next, an example of how to use the refractory molding 11 will be described together with its action.
First, the refractory moldings 11, which are the lowest stage, are arranged along the inner bottom surface of the compartment penetration portion formed in the wall. Next, inserting members such as pipes and cables are arranged at predetermined positions on the arranged fire-resistant moldings 11 . Subsequently, the refractory moldings 11 are further arranged in the space inside the partition penetration.

At this time, since the refractory molded body 11 has flexibility with an Asker C hardness of 30 or less, the refractory molded body 11 can be easily compressed and deformed. The fire-resistant molding 11 of the present embodiment can be easily compressed and deformed by pressing the foam 12 in a direction in which the first outer surface S1 and the second outer surface S2 are brought closer to each other. By temporarily compressing and deforming the fire-resistant molded body 11 in this way, it becomes possible to easily insert the fire-resistant molded body 11 into the space inside the compartment penetration portion. The refractory molding 11 restores its original shape when the pressure is released.

By repeating the work of compressing and deforming the fire-resistant molded body 11 and arranging the fire-resistant molded body 11 in the space inside the partition penetration part, a laminated structure in which a plurality of fire-resistant molded bodies 11 are stacked so as to be in close contact 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 compartment penetration part, the gap can be filled with a filler material such as putty. may be filled.

Next, the operation and effects of this embodiment will be described.
(1) The refractory molding 11 has a foam 12 containing a polymer component made of rubber or thermoplastic resin, thermally expandable graphite, a flame retardant, and a plasticizer. The Asker C hardness of the refractory molding 11 is within the range of 10 or more and 30 or less.

According to this configuration, the fire-resistant molded body 11 has flexibility with an Asker C hardness of 30 or less. It becomes possible to easily insert it into the space inside the compartment penetration part. Therefore, it is possible to improve the workability of arranging in the space inside the partition penetration portion.

Further, the heat-expanding main body portion of the fire-resistant molded body 11 is made of the foam 12 containing air bubbles, so that the weight of the fire-resistant molded body 11 can be reduced. This reduces the work load of transporting a plurality of refractory molded bodies 11 and arranging a plurality of refractory molded bodies 11 in the space of the section penetrating portion.

(2) Fire-resistant molding 11 further includes nonwoven fabric layer 13 provided on the outer surface of foam 12 . In this case, the non-woven fabric layer 13 enhances the slidability of the fire-resistant molded body 11, so that it can be more easily inserted into the space inside the compartment penetration portion. Therefore, it is possible to further improve the workability of arranging in the space inside the partition penetration portion.

(3) The nonwoven fabric layer 13 includes at least one of the first nonwoven fabric layer 13a provided on the first outer surface S1 of the foam 12 and the second nonwoven fabric layer 13b provided on the second outer surface S2. is preferred. In this case, in the fire-resistant molded body 11, since 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 improved, for example, the space inside the section penetration part has fire resistance. It becomes easy to stack and arrange the molded bodies 11 one after another. Therefore, it is possible to improve the workability of stacking and arranging a plurality of fire-resistant moldings 11 in the space inside the section penetration portion.

(4) The foam 12 has a skin layer and a non-skin layer, at least one 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 non-skin layers. In this case, the skin layer that forms at least one of the first outer surface S1 and the second outer surface S2 can suppress the deformation of the outer surface of the foam 12 from curving. In addition, since the non-skin layer forming the connecting outer surface S3 does not easily resist compressive deformation that brings the first outer surface S1 and the second outer surface S2 closer together, the first outer surface S1 and the second outer surface S2 are brought together. The refractory molding 11 can be easily compressed and deformed so as to bring them closer together. That is, it is possible to compress and deform in a predetermined direction while suppressing unnecessary deformation. Therefore, it is possible to further improve the workability of arranging in the space inside the partition penetration portion.

(Change example)
The above embodiment may be modified as follows. This 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 also be formed from a skin layer. Also, any of the first outer surface S1, the second outer surface S2, and the connecting outer surface S3 of the foam 12 can be formed from a non-skin layer.

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

- Although the fire-resistant molding 11 has a square shape in plan view, the shape in plan view can be changed to, for example, a polygonal shape other than a square shape. Also, the overall shape of the fire-resistant molded body 11 may be changed to, for example, a columnar shape, a polygonal columnar shape, a conical shape, a polygonal prism shape, or the like.

Technical ideas that can be grasped from the above embodiments and modifications will be described below.
- In the foam, the content of the thermally expandable graphite is within a 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 A fire-resistant molded article 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 foam composition for molding a fire-resistant foam, comprising a polymer component made of rubber or thermoplastic resin, thermally expandable graphite, a flame retardant, a plasticizer, a foaming agent, and a vulcanizing agent. A 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 using a kneader to prepare a foam composition of each example. The unit of numerical values indicating the blending amounts of raw materials in Tables 1 and 2 is parts by mass. In each example, chloroprene rubber as the polymer component, zinc oxide as the vulcanizing agent, stearic acid as the vulcanization accelerator (1), magnesium oxide as the vulcanization accelerator (2), and p,p'-oxybisbenzene as the blowing agent. A sulfonyl hydrazide, ammonium polyphosphate as a flame retardant, a phthalate plasticizer as a plasticizer, and carbon black as a filler were used.

Using the resulting foam composition, the above-described molding step, lamination step, foaming step, and cutting step were performed in sequence to obtain a fire-resistant molded article of each example. A polyester spunbond nonwoven fabric was used in the lamination process. The conditions for the foaming process were 200° C. and 20 minutes.

(Measurement of Asker C hardness)
A sample (thickness: 10 mm x length: 50 mm x width: 50 mm) of each example was measured using an Asker rubber hardness tester C type according to JIS K7312. The results are shown in Tables 1 and 2.

(Expansion rate)
The foaming rate of the fire-resistant molded article of each example was calculated by the above formula (1). The results are shown in Tables 1 and 2.

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

In the workability evaluation, first, after arranging the three lowest refractory molded bodies along the inner bottom surface of the compartment penetration part, the insertion member was placed on the central refractory molded body of the three. . Next, refractory moldings were placed on both sides of the insertion member. Finally, three refractory moldings were arranged along the ceiling surface of the compartment penetration part to be the uppermost stage. The three refractory molded bodies forming the uppermost stage were arranged by inserting them into the section penetration part after being compressed and deformed in the thickness direction of the refractory molded bodies. Among this series of operations, regarding the operation of arranging the three refractory moldings, which are the uppermost stage, in the partition penetration, the workability is very good (◎), the workability is good (○), and the workability is slightly inferior. (△) was determined in three stages.

各実施例の耐火性成形体については、作業性が非常によい、又は作業性がよいとの評価結果が得られた。これに対して、比較例１，３，５の耐火性成形体のアスカーＣ硬度は、３０を超えており、また比較例２，４の耐火性成形体のアスカーＣ硬度は、１０未満であるため、各比較例の耐火性成形体についての作業性の評価は、各実施例よりも劣る結果となった。

The fire-resistant moldings of each example were evaluated to have very good workability or to have good workability. On the other hand, the Asker C hardness of the refractory moldings of Comparative Examples 1, 3 and 5 exceeds 30, and the Asker C hardness of the refractory moldings of Comparative Examples 2 and 4 is less than 10. Therefore, the evaluation of the workability of the fire-resistant molded article of each comparative example was inferior to that of each example.

DESCRIPTION OF SYMBOLS 11... Fire-resistant molding, 12... Foam, 13... Nonwoven fabric layer, 13a... First nonwoven fabric layer, 13b... Second nonwoven fabric layer, S1... First outer surface, S2... Second outer surface, S3... Connection outer surface .

Claims (4)

A refractory molded article comprising a foam containing a polymer component made of rubber or a thermoplastic resin, thermally expandable graphite, a flame retardant, and a plasticizer,
The outer surface of the foam includes a first outer surface, a second outer surface opposite to the first outer surface, and a connecting outer surface connecting the first outer surface and the second outer surface. , has
The refractory molded article, wherein the Asker C hardness of the first outer surface side and the second outer surface side of the refractory molded article measured according to JIS K7312 is in the range of 10 or more and 30 or less. 2. The method of claim 1 , further comprising a nonwoven layer, said nonwoven layer including at least one of a first nonwoven layer provided on said first outer surface and a second nonwoven layer provided on said second outer surface. The refractory molding described. The foam has a skin layer and a non-skin layer, at least one of the first outer surface and the second outer surface is formed from the skin layer, and the connecting outer surface is the non-skin layer. 3. The fire-resistant molding according to claim 1 , which is formed from a skin layer. 4. The fire resistant molded article according to any one of claims 1 to 3 , wherein the polymer component comprises chloroprene rubber, the flame retardant comprises ammonium polyphosphate, and the plasticizer comprises a phthalate plasticizer. .

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