JPH0116955B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a fire-resistant and heat-resistant body, which has extremely excellent fire- and heat-resistant properties and mechanical strength, and has good fatigue resistance against repeated loads. In particular, it is used in fields that require fatigue resistance and flexibility against repeated loads, such as cushion covering materials for aircraft seats, automobile seats, and home sofas, and for wire-coating threads used in electric furnaces. The present invention provides a method for producing a fire-resistant/heat-resistant body that can be suitably used in fields where fire-resistant/heat-resistant properties and mechanical strength are required.

In general, fire-resistant and heat-resistant materials used in fields that require fire and heat resistance include asbestos sheets, ceramic sheets, glass fiber sheets, and metal fiber sheets. The cause of this problem has been elucidated, and its use is now beginning to be restricted in various countries.Although ceramic sheets have excellent fire resistance properties, the material cost is high.
The price is unsatisfactory, glass fiber sheets do not burn, but there is a problem of perforation due to melting, and the fatigue resistance against repeated loads is not good, and metal fiber sheets are rigid. They have drawbacks such as being unsuitable as fire-resistant/heat-resistant sheets in fields where fatigue resistance and flexibility are required. The reality is that this cannot be satisfied.

The method for producing fire-resistant and heat-resistant bodies of the present invention utilizes the heat resistance and mechanical strength of non-melting organic fibers with a thermal decomposition temperature of 350°C or higher, and the carbonized fibers obtained by pyrolyzing and firing rayon fibers. filaments, knitted or woven materials that take advantage of the fire-resistant and heat-resistant properties of fibers and the flexibility properties of these fibers;
A silicone resin composition containing at least fibrous potassium titanate, which is a fire-resistant and heat-resistant resin composition exhibiting excellent heat resistance properties, is used.

The method for manufacturing a fire-resistant/heat-resistant body of the first invention includes:
Thread-like products, knitted or woven products made of composite yarns consisting of non-melting organic fibers with a thermal decomposition temperature of 350°C or higher and rayon fibers, or non-melting organic fibers with a thermal decomposition temperature of 350°C or higher and rayon fibers, and 20 to 100 parts by weight of organic fiber yarn made of non-melting organic fibers with a thermal decomposition temperature of 350°C or higher, By performing a firing treatment at a heating temperature lower than the thermal decomposition temperature of the non-melting organic fiber in the filamentous material or knitted or woven material,
The rayon fibers in the thread-like material, knitted material, or woven material are modified into pyrolyzed and fired carbonized fibers, and then at least fibrous potassium titanate is applied to at least one surface of the thread-like material, knitted material, or woven material. This process consists of applying or impregnating a silicone resin composition containing a silicone resin composition, and is used in fields that require fatigue resistance and flexibility against repeated loads, or in fields that require excellent fire resistance, heat resistance, and mechanical properties. A fire-resistant and heat-resistant body can be obtained that can be suitably used in fields where strength is required.

In addition, in the method for producing a fire-resistant/heat-resistant body according to the second invention, rayon fibers used in a filamentous material or knitted or woven material to be subjected to firing treatment are prepared in advance.
Ammonium sulfate, ammonium bisulfate, ammonium bisulfite, ammonium thiosulfate, ammonium aluminum sulfate, ammonium phosphate,
This method uses rayon fibers that have been treated with one or more agents selected from guanidine phosphate and tetrakis(hydroxylmethyl)phosphonium chloride, and the following steps are all performed according to the method of the first invention. By going through the corresponding steps, a fire-resistant and heat-resistant body with even better fire resistance and strength can be obtained.

In the method for producing a fire-resistant/heat-resistant body of the present invention, a filamentous material, knitted or woven material,
The base material to be resin-processed and the resin composition used when resin-processing the base material each have their own characteristics.
The configurations thereof will be sequentially explained below.

The filamentous material, knitted or woven material used in the firing process in the method of the present invention is a filamentous material or a knitted or woven material composed of a composite yarn consisting of non-melting organic fibers and rayon fibers with a thermal decomposition temperature of 350°C or higher. Knitted, woven, or composite yarn made of non-melting organic fibers and rayon fibers with a thermal decomposition temperature of 350°C or higher 100
It is a filamentous material, knitted or woven material composed of 20 to 100 parts by weight of organic fiber yarn made of non-melting organic fibers with a thermal decomposition temperature of 350° C. or higher.

Non-melting organic fibers with a thermal decomposition temperature of 350°C or higher do not undergo thermal decomposition when converting the rayon fibers in the filament or knitted or woven fabric into thermally decomposed and fired carbonized fibers. Of course, it is an organic fiber that does not melt, but in addition to this, it is preferable to use a material that has a high strength indicated by knot strength, etc., and a high fatigue resistance against repeated loads, so-called good bending resistance. For example, the general formula -NH-Ar ₁ -NH-CO-Ar ₂ -CO-...(1) -NH-Ar ₃ -CO-...(2) [However, Ar ₁ , Ar ₂ , Ar ₃ are divalent These represent aromatic groups, and they may be the same or different. ] A typical example of a polymer whose main chain is composed of repeating units represented by -phenylene isophthalamide), poly-(m-phenylene terephthalamide), poly-(p-phenylene terephthalamide), poly-(p-phenylene isophthalamide),
Poly-(4,4'-oxydiphenylene isophthalamide), poly-(4,4'-oxydiphenylene terephthalamide), poly-(m-benzamide),
Aromatic polyamide system lengths obtained using poly-(p-benzamide), etc., or copolymers thereof, or the above-mentioned polymers containing a small amount of components other than aromatic groups, such as piperazine, cyclohexanedicarboxylic acid, etc. Fibers and short fibers or, for example, Rho^ne-Poulenc
Polyamide-imide long fibers, short fibers, or mixed fibers thereof, which are sold under the registered trademark Kermel by Poulenc, are used. In addition, in the method of the present invention, if the rayon fiber in the filamentous material or knitted or woven material to be subjected to the firing process has been previously treated with ammonium sulfate, ammonium thiosulfate, etc., a trace amount of acid may be released during this firing process. However, the above-mentioned aromatic polyamide fiber is excellent in acid resistance, so the degree of deterioration caused by this acid is small, and it is the most suitable fiber.

The composite yarn constituting the filamentous material, knitted or woven material used in the method of the present invention is composed of the above-mentioned non-melting organic fiber and rayon fiber. Cored yarns in which rayon short fiber tufts are wound, covered yarns in which rayon yarns are wound around core yarns made of non-melting organic fiber yarns, blended yarns of rayon fibers and non-melting organic fibers, etc. are used.

The thread-like material, knitted or woven material using the composite yarn is processed in the next firing process.
The rayon fibers in the woven fabric are modified into pyrolyzed and fired carbonized fibers, but when the above-mentioned cored yarn or covered yarn is used as the composite yarn, the front and back surfaces of the filament or knitted or woven fabric are It is composed of pyrolyzed and fired carbonized fibers that exhibit superior fire resistance properties, and the mechanical strength, which is said to be the weak point of these fibers, is guaranteed by the core yarn made of non-melting organic fiber in the composite yarn. Therefore, better fire resistance performance can be obtained. In addition, when using a blended yarn of non-melting organic fibers and rayon fibers as a composite yarn, the mixing rate of non-melting organic fibers, which causes poor fire resistance, should be kept low; It is preferable to use a blended yarn containing about 10 to 50% by weight of non-melting organic fibers so that the mechanical strength is guaranteed by the organic fibers.

Thread-like material or knitted material used in the present invention,
As described above, the woven fabric may be composed only of the composite yarn, or may be composed of 100 parts by weight of the composite yarn and 20 to 100 parts by weight of non-melting organic fiber yarn with a thermal decomposition temperature of 350°C or higher. However, the price of non-melting organic fibers is high, and filamentous, knitted, or woven materials containing a large amount of non-melting organic fibers may have poor fire resistance. Since rayon fibers are inferior to those of pyrolyzed and fired carbonized fibers and tend to have lower fire resistance, it is preferable to use filamentous materials or knitted or woven materials made only of the composite yarns.

In each method of the present invention, a filamentous material, knitted or woven material containing non-melting organic fibers and rayon fibers as fiber components is subjected to firing treatment in such a manner that the non-melting organic fibers do not undergo thermal decomposition. That is, the rayon fibers in the filamentous material, knitted or woven material are modified into pyrolyzed and sintered carbonized fibers by firing at a heating temperature lower than the thermal decomposition temperature of non-melting organic fibers.

In particular, in the case of the second method of the present invention, the rayon fibers in the filamentous material or knitted or woven material to be subjected to the firing treatment are prepared in advance by ammonium sulfate, ammonium bisulfate, ammonium bisulfite, ammonium thiosulfate, or aluminum sulfate. ammonium,
Since the fibers are treated with one or more agents selected from ammonium phosphate, guanidine phosphate, and tetrakis(hydroxylmethyl)phosphonium chloride, the pyrolytic fired carbonized fibers formed by the firing treatment are free from oxidation. It has such excellent fire resistance that it does not catch fire even when exposed to acetylene flame, has good strength, and has effects such as suppressing the burnt thinning of rayon fibers due to baking treatment.

By firing the filamentous material, knitted or woven material at a heating temperature lower than the thermal decomposition temperature of the non-melting organic fiber in the filamentous material, knitted or woven material, Although the heating temperature for converting rayon fibers into pyrolyzed and fired carbonized fibers is lower than the pyrolysis temperature of non-melting organic fibers, the heating temperature during the firing process causes a decrease in the strength of non-melting organic fibers, so it should be kept as low as possible. Low temperatures are preferred. However, in this case, since a long time is required to modify the rayon fibers into carbonized fibers, a heating temperature of about 200 to 260° C. is most preferable in view of the balance between the two.

The filamentous, knitted, or woven material obtained by the above method, that is, carbonized fiber in which rayon fiber is made into pyrolytic and sintered carbonized fiber by firing treatment, and non-melting organic fiber with a pyrolysis temperature of 350°C or higher. The silicone resin composition used when a base material consisting of a filamentous material, knitted or woven material containing as a fiber component is then subjected to a resin processing treatment with a silicone resin composition,
A silicone resin varnish containing at least fibrous potassium titanate and optionally an inorganic filler and a flame retardant is used.

The silicone resin in the silicone resin composition used for resin processing is one that allows the fire-resistant and heat-resistant body obtained by the present invention to exhibit sufficient heat resistance and water repellency, and generally contains hydrogen atoms. , vinyl group, allyl group, aryl group, hydroxyl group, alkoxyl group having 1 to 4 carbon atoms, amino group, mercapto group, etc., such as polydimethylsiloxane silicone resin, polydiph Enylsiloxane silicone resins, polymethylphenylsiloxane silicone resins, epoxy-modified silicone resins modified with other resins, polyester-modified silicone resins, fatty acid-modified silicone resins, alkyd-modified silicone resins, amino resin-modified silicone resins, etc. Organopolysiloxane-based silicone resins, polyacryloxyalkylalkoxysilane-based silicone resins, polyvinyl-based silicone resins, and the like are used. The fibrous potassium titanate blended into the silicone resin composition imparts sufficient fire resistance properties to the fire-resistant and heat-resistant body obtained by the method of the present invention, and its components are of the general formula
K ₂ O・mTiO ₂・nH ₂ O (in the formula, m is a positive integer of 8 or less, n is 0 or a positive integer of 4 or less), and generally has a fiber diameter of 0.1 to 0.7 μm and a fiber length of 10 to
It is a 50 μm whisker and is manufactured using titanium oxide and potassium carbonate as raw materials by a calcination method, a hydrothermal method, a flux method, etc. The above-mentioned fibrous potassium titanate can be used as it is, but in order to achieve a better reinforcing effect, it is necessary to add silane coupling of about 0.05 to 1.0% by weight to the fibrous potassium titanate. agent,
For example, γ-aminopropyltriethoxysilane,
It is preferable to use fibers whose surfaces have been treated with a silane coupling agent such as γ-glycidoxypropyltrimethoxysilane. The inorganic filler blended into the silicone resin composition as desired has the effect of reinforcing the resin layer formed by resin processing with a silicone resin varnish using the silicone resin composition, such as titanium oxide. , mica, alumina, talc, glass fiber powder, rock wool fine fibers, silica powder, and clay. In general, it is preferable to use a fine powder with a diameter of 50 μm or less so as not to impair the surface smoothness of the synthetic resin layer. In addition, flame retardants that may be blended into the silicone resin composition as desired in order to obtain a fire-resistant/heat-resistant material having superior flame retardant properties include, for example, phosphate ester type, organic halogen compound type, phosphazene type, etc. Organic flame retardants such as compound type, inorganic such as crystal water releasing type, carbon dioxide gas releasing type, decomposition endothermic type and phase change type such as calcined gypsum, alum, calcium carbonate, aluminum hydroxide, hydrotalcite aluminum silicate etc. Inorganic flame retardants such as endothermically decomposed inorganic compounds and antimony compounds are used. The silicone resin composition may further contain curing agents and curing accelerators well known to those skilled in the art, such as metal carboxylates, organotin compounds, titanium chelate compounds, tertiary amine compounds, peroxides, and platinum catalysts. etc., colorants, etc. may be added as appropriate. The amount of silicone resin and the amount of fibrous potassium titanate in the silicone resin varnish are determined so that the water repellent effect of the silicone resin and the flame retardant effect and reinforcing effect of the fibrous potassium titanate are expressed in a balanced manner. The amount is preferably about 5 to 400 parts by weight of fibrous potassium titanate per 100 parts by weight of the silicone resin. Furthermore, when using inorganic fillers together,
It is preferable to replace about 10 to 90% by weight of the fibrous potassium titanate with an inorganic filler.

The resin processing using the silicone resin composition, that is, the resin processing using the silicone resin varnish, is achieved by a coating method such as a spraying method, a roll coating method, a reverse roll method, a knife coating method, or an impregnation method, and the above-mentioned thread-like material or knitting, At least one of the upper or lower sides or one of the inner and outer sides of the fabric is treated with a resin, and usually a coating film made of a silicone resin composition is applied to a filamentous material, knitted fabric, or woven fabric. It is formed on at least one surface of. During this resin processing, the amount of solid components deposited is usually 50~
Coated or impregnated with ^about 500g/m2,
Next, the silicone resin in the silicone resin varnish is dried and cured. Examples of curing methods include room temperature curing, heat curing, ultraviolet curing, and electron beam curing. For example, in the case of heat curing,
Hardening treatment is achieved by performing treatment at about 150 to 200°C for about 1 to 30 minutes.

The refractory/heat-resistant body obtained by the method of the present invention having the above-mentioned configuration has, for example, the configuration clearly shown in the drawings, and the refractory/heat-resistant body 1 shown in FIG. In the second edition, a base material 2 made of a woven fabric and a silicone resin film 3 containing at least fibrous potassium titanate formed so as to cover one surface of the base material 2
It consists of. Further, the fire-resistant/heat-resistant body 4 shown in FIG. 2 is formed by a base material 5 made of a knitted or woven material after firing treatment, and the upper and lower surfaces of the base material 5 are coated. Furthermore, the refractory/heat-resistant body 8 shown in FIG.
Synthesis of a silicone resin containing at least fibrous potassium titanate, including a base material 9 made of a woven material, and cured films 10 and 11 formed so as to cover the upper and lower surfaces of the base material 9. Resin layer 12
It consists of

The method for manufacturing a fire-resistant/heat-resistant body of the first invention includes:
Thread-like products, knitted or woven products made of composite yarns consisting of non-melting organic fibers with a thermal decomposition temperature of 350°C or higher and rayon fibers, or non-melting organic fibers with a thermal decomposition temperature of 350°C or higher. 100 parts by weight of composite yarn consisting of rayon fiber and thermal decomposition temperature
The base material is a filament made of 20 to 100 parts by weight of organic fiber yarn made of non-melting organic fibers at 350°C or higher, or knitted or woven rayon fibers modified into pyrolyzed and fired carbonized fibers. Then, this filamentous material, knitted material, or woven material is subjected to resin processing using a silicone resin composition containing at least fibrous potassium titanate, which has excellent fire and heat resistance properties.

In addition, in the method for producing a fire-resistant/heat-resistant body according to the second invention, rayon fibers used in the filamentous material or knitted or woven material to be subjected to firing treatment are prepared in advance.
Ammonium sulfate, ammonium bisulfate, ammonium bisulfite, ammonium thiosulfate, ammonium aluminum sulfate, ammonium phosphate,
This method uses rayon fibers that have been treated with one or more agents selected from guanidine phosphate and tetrakis(hydroxylmethyl)phosphonium chloride, and the following steps all correspond to the first method of the invention. The process of

Thus, in each of the methods of the present invention, a fire-resistant and heat-resistant body in which the tissue voids of the filamentous material, knitted or woven fabric are filled with the silicone resin can be obtained, and the effect is extremely excellent in fire-resistant and heat-resistant properties. A product having the following properties is obtained.

Furthermore, since the silicone resin composition containing at least fibrous potassium titanate used in each of the present inventions usually exhibits a white color, the refractory/heat-resistant body obtained by each of the methods of the present invention has a white surface. It also has an excellent effect on heat reflection.

Furthermore, since the base material used in each of the methods of the present invention is a filamentous material, knitted or woven material composed of pyrolyzed and sintered carbonized fibers of rayon fibers and non-melting organic fibers, the resulting fire-resistant and heat-resistant materials are The rubber material not only has the excellent fire resistance of the base material, but also exhibits excellent mechanical strength, bending abrasion resistance, flexibility, etc., and has fire and heat resistance as well as resistance to repeated loads. Used as covering materials for cushion materials in aircraft seats, automobile seats, home sofas, etc., which require fatigue resistance and flexibility, and in electric furnaces, which require fire resistance, heat resistance, and mechanical strength. It is extremely suitable for use as wire covering yarn, etc.

In addition, since the base material of the fire-resistant and heat-resistant bodies obtained by each method of the present invention is processed with silicone resin,
Of course, this silicone resin processing improves fire and heat resistance, but the silicone resin processing also improves the abrasion resistance of the resulting fire and heat resistant body and prevents fibers from falling off in the base material. , and also has the effect of improving handling workability, etc.
It is effective.

In addition, in the method for producing a refractory/heat-resistant body of each of the present inventions, when obtaining a base material made of a filamentous material or a knitted or woven cloth made of pyrolytic and sintered carbonized fibers and non-melting organic fibers, Thread-like material or knitted material composed of rayon fiber and non-melting organic fiber,
Because it uses a woven material, it does not generate harmful gases when exposed to the high temperature atmosphere that occurs when polyacrylonitrile fibers are fired into carbonized fibers, making them safer to handle. It has an excellent effect.

In addition, the Young's modulus of carbonized rayon fiber is 290.
Kg/ ^mm2 , whereas the Young's modulus of the carbonized polyacrylonitrile fiber mentioned above is 700Kg/ ^mm2.
The toughness index, which is the product of strength and elongation, is 8.84 for the former, while it is only 7.08 for the latter. When using yarn, rayon yarn thins to 1.3 denier during firing during carbonized fiber production, while polyacrylonitrile yarn thickens to 1.52 denier, so the latter is much more durable than the former. Because of this, filamentous materials or knitted or woven fabrics composed of pyrolyzed and fired carbonized fibers using polyacrylonitrile-based carbonized fibers and non-melting organic fibers become hard and brittle. Since the base material used in this invention has flexibility, it exhibits an excellent effect as a fireproof/heat-resistant material especially in fields where flexibility is required.

Furthermore, in the method of the second invention, since the rayon fibers in the filamentous material or knitted or woven material to be subjected to the firing treatment are previously subjected to chemical treatment, the heat generated in the firing treatment is For example, decomposed carbon fibers have excellent fire resistance and do not catch fire even when exposed to acetylene oxide flame,
In addition, even better strength can be obtained,
In addition, effects such as the degree of thinning of the rayon fibers during the firing process can be suppressed to a low level.

Hereinafter, the specific structure of the method of the present invention will be explained based on Examples.

Example 1 Cornex fiber (aromatic polyamide) [manufactured by Teijin Ltd.: 2d x 51 mm] and rayon fiber [Nitto Boseki
Co., Ltd.: 1.5d x 51mm] at a ratio of 30:70 (weight ratio) (count 16/ ^27s , number of twists 3.7)
Twill fabric (thread density: 48 vertically/2.5cm x 40 horizontally/
2.5cm: weight 290g/m ² , thickness 0.75m/m) was immersed in an aqueous solution of 70g/guanidine phosphate, wrung out, dried at 110°C for 30 minutes, and then exposed to air at 250°C for 1 hour. A blended fabric consisting of pyrolytic and calcined carbonized fibers and cornex fibers was obtained. The tensile strength of the resulting blended fabric was 35 kg/25 mm width.

On the other hand, silicone resin varnishes for resin processing include silicone resin varnish [non-volatile content: 50%, Toshiba Silicon Co., Ltd., YR3270] 42.2 parts by weight, fibrous potassium titanate [manufactured by Otsuka Chemicals Co., Ltd.: Tesmo D] 25.7 parts by weight. Parts by weight, aluminum hydroxide 14.7 parts by weight, subpencil
A mixed composition consisting of 3.4 parts by weight, 23.3 parts by weight of xylene, and 5 parts by weight of a curing agent [for YR3270] was prepared by stirring and mixing.

The obtained silicone resin varnish is dipped and impregnated into the above-mentioned blended fabric in a conventional manner, dried at 110°C for 4 minutes, and then cured at 180°C for 6 minutes to produce a fire-resistant and heat-resistant product, which is the target product of the method of the present invention. I got a sex body.

The amount of solid components adhered to the silicone resin varnish is 150 g/m ² , and the obtained sheet, which is a fire-resistant and heat-resistant material, does not ignite even when exposed to the flame of a Bunsen burner, and also meets JIS L1091A-1 method. When the flame retardant properties were investigated, good results were obtained with no afterflame and no residual dust.

Example 2 Kevlar filament yarn (aromatic polyamide type) (manufactured by DuPont: Type 964, 200d) was fed into the drafted rayon fiber (1.5d bright roving) fleece from behind the front roller of a spinning machine. The yarn was twisted from the front of the front roller and wound around a woodwind to obtain a Kevlar-core rayon yarn.

The resulting three-stranded cored yarn was treated with a treatment solution consisting of 400 g of ammonium sulfate, 70 g of (di)ammonium phosphate, and 1400 c.c. of water, then dried to form a filament with an adhesion rate of 20.5%, which was further processed.
It was heated in air at 250°C for 1 hour, washed with water, and dried.

The thus obtained twisted yarn was impregnated in the same resin varnish as that used in Example 1, squeezed, dried and cured under the same conditions as used in Example 1, and a string-like product was obtained. I got it.

The amount of solid components adhered to the silicone resin varnish in the obtained string-like material was 82%, and it exhibited extremely excellent functions and effects as a double-covered electric wire yarn in an electric furnace.

[Brief explanation of drawings]

Figures 1 to 3 show the fire resistance and
FIG. 3 is a schematic diagram showing different configurations of sheet-like materials among the heat-resistant bodies. 1: Fireproof/heat-resistant body, 2: Base material, 3: Silicone resin layer containing at least fibrous potassium titanate.

Claims (1)

[Scope of Claims] 1. A filamentous material, knitted or woven material composed of a composite yarn consisting of non-melting organic fibers and rayon fibers with a thermal decomposition temperature of 350°C or higher, or a thermal decomposition temperature of 350°C. A filamentous material composed of 100 parts by weight of composite yarn made of the above non-melting organic fibers and rayon fibers and 20 to 100 parts by weight of organic fiber yarn made of non-melting organic fibers with a thermal decomposition temperature of 350°C or higher; or By firing the knitted or woven fabric at a heating temperature lower than the thermal decomposition temperature of the non-melting organic fibers in the filament or knitted or woven fabric, the rayon fibers in the filament or knitted or woven fabric are It is modified into pyrolyzed and fired carbonized fibers, and then a silicone resin composition containing at least fibrous potassium titanate is applied or impregnated on at least one surface of the filamentous material, knitted material, or woven material. A method for producing a fire-resistant/heat-resistant body, characterized by subjecting it to a resin processing treatment consisting of: 2. The method for producing a fire-resistant/heat-resistant body according to claim 1, wherein the non-melting organic fiber having a thermal decomposition temperature of 350° C. or higher is an aromatic polyamide fiber, a polyamide-imide fiber, or a mixture of both. 3 A composite yarn consisting of a non-melting organic fiber with a thermal decomposition temperature of 350°C or higher and a rayon fiber is a cored yarn in which rayon short fiber tufts are wrapped around a core yarn made of a non-melting organic fiber yarn, and a rayon yarn is a non-melting yarn. Production of the fire-resistant/heat-resistant body according to claim 1, which is either a covered yarn wound around a core yarn made of organic fiber yarn, or a blended yarn of rayon fiber and non-melting organic fiber. Method. 4 At least one of the knitting, warp, and weft of the woven fabric to be subjected to firing treatment has a thermal decomposition temperature.
The method for producing a fire-resistant/heat-resistant body according to claim 1, which is made of a composite yarn made of non-melting organic fibers and rayon fibers having a temperature of 350° C. or higher. 5 Thread-like material, knitted or woven material composed of a composite yarn consisting of non-melting organic fibers with a thermal decomposition temperature of 350°C or higher and rayon fibers, or non-melting organic materials with a thermal decomposition temperature of 350°C or higher A filamentous material, knitted or woven material composed of 100 parts by weight of composite yarn consisting of fibers and rayon fibers and 20 to 100 parts by weight of organic fiber yarn made of non-melting organic fibers with a thermal decomposition temperature of 350°C or higher. The rayon fibers in the filament or knitted or woven fabric are prepared in advance from ammonium sulfate, ammonium bisulfate, ammonium bisulfite, ammonium thiosulfate, ammonium aluminum sulfate, ammonium phosphate, guanidine phosphate, or tetrakis(hydroxylmethyl)phosphonium chloride. It is formed from rayon fibers treated with one or more selected chemicals, and then the filamentous material, knitted or woven material is thermally decomposed in the non-meltable organic fibers in the filamentous material, knitted or woven material. The rayon fibers in the thread-like material, knitted or woven material are modified into pyrolyzed and fired carbonized fibers by firing at a heating temperature lower than that temperature, and then the thread-like material, knitted or woven material is
A fire-resistant/heat-resistant body characterized by subjecting at least one side of a woven fabric to a resin processing treatment consisting of applying or impregnating a silicone resin composition containing at least fibrous potassium titanate. manufacturing method. 6. The method for producing a refractory/heat-resistant body according to claim 5, wherein the heating temperature in the firing treatment is 200 to 260°C.