JPH0570938U - Heat resistant sheet - Google Patents

Abstract

(57) [Summary] [Purpose] Practically sufficient heat resistance, easy to sew,
(EN) Provided is a heat-resistant sheet which has excellent bending resistance and is resistant to tearing from perforations. [Structure] An organic fiber base cloth and a heat-resistant coating layer, wherein the organic fiber base cloth has a melting point of 300 ° C. or higher or a heat-resistant synthetic organic fiber of 50% by weight or more, and an organic material different from that. A woven fabric, a knitted fabric, or a composite fabric thereof comprising 50% by weight or less of a fiber, wherein the heat-resistant coating layer comprises a silicone resin and an alkali titanate in a ratio of 100: 1 to 1: 1.
A heat resistant sheet containing a weight ratio of 200.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat-resistant sheet, and more specifically, to a fiber sheet which has excellent heat resistance, as well as sewability and flex resistance.

[0002]

[Prior Art]

 Conventionally, a fibrous base cloth made of polyester fiber (melting point 255 to 260 ° C.), polyamide fiber (melting point 215 to 260 ° C.) and the like is applied to a thermoplastic resin such as polyvinyl chloride resin (PVC) (heat resistant temperature 66 to 60 ° C.). 79 ° C), polyurethane resin (heat-resistant temperature 90-120 ° C), polyacrylic resin (heat-resistant temperature 60-88 ° C), polyethylene resin (heat-resistant temperature 80-120 ° C), polypropylene resin (heat-resistant temperature 120-160 ° C) A sheet material obtained by coating a polyamide resin (heat resistant temperature of 80 to 150 ° C.) or a polyester resin (heat resistant temperature of about 120 ° C.) is known. In this case, since the fibrous base cloth has a relatively low melting point, the coating material for covering the fibrous base cloth must be one that can be coated at a processing temperature that the fibrous base cloth can withstand. As the coating material, the resin having relatively low heat resistance is used as described above.

However, recently, the fiber sheet material is often used in, for example, fire clothes, heat resistant clothing, film materials for construction, etc., and is safe from flames, burns and other thermal disasters. In order to maintain the above, requirements for non-combustibility and flame retardancy are increasing. Therefore, development of heat resistant sheet material is strongly desired.

In response to the above-mentioned requirements, JP-A-58-120677 and JP-A-58-127757 propose high-temperature heat-insulating paints and fire-resistant heat-insulating films containing an alkali titanate and a silicone resin. Further, JP-A-58-130183, JP-A-58-199791 and JP-A-59-35938 disclose that an inorganic core material such as glass fiber base cloth or asbestos paper is A fire-resistant sheet obtained by forming a coating layer containing a silicone resin and an alkali titanate is disclosed.

The fire-resistant sheets using these inorganic fiber base fabrics have excellent fire-resistant heat insulation properties, but their weight (unit weight) is large, which makes them inconvenient to use and handle and difficult to sew. Moreover, since it has low bending resistance, it is easily broken during use and is easily torn from perforations.

JP-A-59-204981 discloses a silicone containing fibrous potassium titanate in a base cloth made of usual organic fibers such as cellulosic natural fibers, polyester fibers, polyamide fibers, rayon fibers and vinylon fibers. A flameproof / water repellent sheet obtained by impregnating with a resin varnish, drying and curing is disclosed. However, further improvement in fire resistance and heat insulation is required.

[0007]

[Problems to be solved by the device]

 The present invention aims to provide a heat-resistant sheet which has satisfactory heat resistance, is easy to sew, has good bending resistance, and is resistant to tearing from perforations.

[0008]

[Means for Solving the Problems]

 The heat-resistant sheet of the present invention comprises 50 wt% or more of a heat-resistant synthetic organic fiber having a melting point of 300 ° C. or more or a thermal decomposition point, and 50 wt% or less of the heat-resistant synthetic organic fiber. A woven / knitted fabric composed of different kinds of organic fibers, or an organic fiber base fabric composed of a composite fabric thereof, and a silicone resin and 100 parts by weight of the silicone resin formed on at least one surface of the organic fiber base fabric. On the other hand, it is characterized by having a heat resistant coating layer containing 1 to 200 parts by weight of alkali titanate.

As shown in FIG. 1, the heat-resistant sheet of the present invention comprises an organic fiber base cloth 1 and a heat-resistant coating layer 2 formed on one surface thereof. The heat resistant coating layer 2 may be formed on both surfaces of the organic fiber base fabric 1 as shown in FIG.

[0010]

[Action]

 The heat-resistant synthetic organic fiber contained in the organic fiber base fabric used in the present invention has a melting point of 300 ° C. or higher, or a thermal decomposition point. Polymers that form such high melting point or high thermal decomposition point fibers include those shown in Tables 1-5.

[0011]

[Table 1]

[0012]

[Table 2]

[0013]

[Table 3]

[0014]

[Table 4]

[0015]

[Table 5]

Among the heat-resistant polymers shown in Tables 1 to 5, polymetaphenylene isophthalamide and polyparaphenylene terephthalamide are especially common, and other para-type aramid fibers manufactured by Teijin Ltd. are used. "HM-50" etc. can also be used.

Aromatic polyamides useful in heat resistant synthetic organic fibers also include at least 50 mol% of the following formulas (I) and (II):

[Chemical 1] [In the above formula, Ar ₁ and Ar ₂ represent a divalent aromatic group, and these may be the same or different from each other] At least one selected from the units represented by It is preferable to have as a main repeating unit. In the above formulas (I) and (II), the divalent aromatic group represented by Ar ₁ and Ar ₂ has the following formula:

[Chemical 2] [In the above formulas, A is -O -, - S -, - SO -, - SO 2 -, - CO -, - CH 2 - or -C (CH _{3) 2} - and represented] aromatic residue represented by It is preferably selected from the group of groups. These aromatic residues may contain an inert substituent such as a halogen, an alkyl group or a nitro group.

Generally, the aromatic polyamide has the following formula:

[Chemical 3] Those having a repeating unit represented by as the main component are more preferable.

As the heat-resistant synthetic organic fiber, in addition to the above, fluorine-based fibers and other fibers can be used as long as they have a melting point or a thermal decomposition point of 300 ° C. or higher. In order to promote adhesion with the heat resistant coating layer, an organic fiber different from the heat resistant synthetic organic fiber having a melting point or a thermal decomposition point lower than 300 ° C. of 50% by weight or less is used. It is mixed in the base cloth. However, the content of the heat-resistant synthetic organic fiber in the organic fiber base fabric is 50% (weight) or more, and preferably 60% (weight) or more. When the content ratio of the different kinds of organic fibers is 50 to 5% by weight, the adhesive force with the heat resistant coating layer is promoted and the peel strength is increased as compared with the other cases.

The fibers in the organic fiber base cloth may be any shape such as short fiber spun yarn, long fiber yarn, split yarn, taper yarn, etc. The organic fiber base fabric may be woven fabric, knitted fabric, or these It is one of the composite fabrics. However, considering the strength of the sewn portion and the bending resistance, a woven fabric is preferable as the organic fiber base fabric. Further, as the form of the fiber, a form of long fiber (filament) having a small elongation to stress is preferable, and a plain woven fabric is preferably formed. However, there is no particular limitation on the weaving structure and its form. The organic fiber base fabric is useful for maintaining the mechanical strength of the resulting heat resistant sheet at a high level.

In the heat resistant sheet of the present invention, the heat resistant coating layer contains a silicone resin and an alkali titanate.

The silicone resin used in the present invention is at least one selected from organopolysiloxane-based silicone resins, polyacryloxyalkylalkoxysilane-based silicone resins, polyvinylsilane-based silicone resins and modified products of the silicone resins. Those consisting of are preferred.

The organopolysiloxane resin used in the present invention has at least one organic substituent such as vinyl group, allyl group, hydroxyl group, alkoxyl group having 1 to 4 carbon atoms, amino group and mercapto group. , Polydimethylsiloxane-based silicone resins, polydiphenylsiloxane-based silicone resins, polymethylphenylsiloxane-based silicone resins, and resins composed of copolymers thereof.

The polyacryloxyalkylalkoxysilane-based silicone resin used in the present invention has the general formula:

[Chemical 4] (R is a monovalent hydrocarbon group having 1 to 10 carbon atoms, R'is hydrogen or a monovalent hydrocarbon group having 1 to 10 carbon atoms, and R "is a divalent hydrocarbon group having 2 to 10 carbon atoms. And n is an integer of 1 to 3)) and a copolymer of an acryloxyalkylalkoxysilane represented by the formula (1) and at least one kind of ethylene-based unsaturated monomer.

Further, the polyvinylsilane-based silicone resin used in the present invention has the general formula:

[Chemical 5] [However, R'is the same as the above, B is OR ', or OR "-OR' (R 'and R" are the same as the above). ] A vinyl silane compound represented by the following and a copolymer of at least one ethylenically unsaturated monomer are also included.

The above-mentioned ethylene-based monomer may be copolymerized in the silicone resin at a content of 1 to 50% by weight. Examples of such a monomer include styrene, methyl styrene, dimethyl styrene, ethyl styrene, chlorostyrene, bromostyrene, fluorostyrene, nitrostyrene, acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate, and methyl methacrylate. , Ethylmethacrylate, butylmethacrylate, acrylamide, 2-hydroxyethylacrylate, 2-hydroxyethylmethacrylate, acrylonitrile, methacrylonitrile, 2-chloroacrylonitrile, vinyl acetate, vinyl chloroacetate, vinyl butyrate, vinyl chloride. Ride, vinyl bromide, vinyl fluoride, vinylidene chloride, vinyl halogen compounds, and vinyl ether There is Le, and the like.

The above-mentioned silicone resin may be modified with other resin such as epoxy resin, polyester resin, alkyd resin, amino resin, or may be modified with fatty acid.

In the present invention, one or two selected from these organopolysiloxane-based silicone resins, polyacryloxyalkylalkoxysilane-based silicone resins, polyvinylsilane-based silicone resins, and modified products of these silicone resins. The above mixtures can be used. However, when importance is attached to self-extinguishing property, in the organopolysiloxane-based silicone resin, the polysiloxane component is preferably 70% by weight or more in the silicone resin, and the polyacrylooxyalkylalkoxysilane-based silicone resin and In the polyvinyl silane-based silicone resin, the ethylenically unsaturated monomer to be copolymerized is preferably 50% by weight or less, particularly preferably 20% by weight or less. Further, when importance is attached to self-extinguishing property and flexibility, an unmodified organopolysiloxane-based silicone resin is preferable. Incidentally, these silicone resins may be any of solids, plastic pastes, liquids, and dispersions such as emulsions at room temperature, and if necessary, an appropriate solvent is added and used.

When viewed by curing mechanism, silicone resins are classified into room temperature curing type, heat curing type, ultraviolet ray or electron beam curing type, and generally, curing agents and curing accelerators known to those skilled in the art, such as zinc and lead. , Metal carboxylates such as cobalt and iron, organotin compounds such as dibutyltin octoate and dibutyltin laurate, titanium chelate compounds such as tetrapropyl titanate and tetraoctyl titanate, N-N-dimethylaniline, tritium. A desired three-dimensional network structure can be obtained by using a tertiary amine such as ethanolamine, a peroxide such as benzoyl peroxide, cyclyl peroxide, t-butyl peroxide, and a platinum catalyst in combination. Harden.

The alkali titanate used in the present invention has a general formula:

[Chemical 6] (Wherein M represents an alkali metal such as Li, Na or K, n represents a positive real number of 8 or less, and m represents 0 or a positive real number of 4 or less). , And more specifically, the following formula:

[Chemical 7] Alkali titanate having a salt-type structure represented by:

[Chemical 8] An alkali titanate having a tunnel structure represented by Of these, the general formula:

[0031]

[Chemical 9] The potassium hexatitanate and its hydrate represented by the formula (wherein m is the same as above) are preferable in that the fire resistance and heat insulating property of the final target product are further improved. Alkali titanate is not limited to potassium hexatitanate, and is generally a powder or fibrous fine crystal. Among them, those having a fiber length of 5 μm or more and an aspect ratio of 20 or more, particularly 100 or more are heat-resistant of the present invention. It gives favorable results in improving the strength of the sheet. In addition, fibrous potassium titanate is particularly preferable for realizing the performance of the heat-resistant sheet of the present invention because of its high specific heat and excellent heat insulating performance.

Further, the heat resistant coating layer of the present invention may contain a high refractive index inorganic compound or a heat absorbing inorganic compound. High-refractive-index inorganic compounds have excellent shielding performance against radiant heat, and when endothermic inorganic compounds come into direct contact with the slag during welding or fusing, they are heated at this contact surface and an endothermic reaction occurs during their decomposition, causing slag formation. Reduce the temperature. Therefore, the above-mentioned inorganic compound can prevent the heat-resistant coating layer of the present invention from collapsing or puncture, and can further protect the organic fiber substrate.

The high-refractive-index inorganic compound useful in the present invention may have a refractive index of 1.5 or more, but particularly preferably has a specific gravity of 2.8 or more. Examples thereof include the following. There is something. 1) Dolomite (dolomite, specific gravity 2.8 to 2.9, refractive index 1.50 to 1.68) Magnesite (rhodolith, specific gravity 3.0 to 3.1, refractive index 1.51 to 1) .72) Aragonite (specific gravity 2.9 to 3.0, refractive index 1.53 to 1.68) Apatite (apatite, specific gravity 3.1 to 3.2, refractive index 1.63 to 1.64) Spinel (cusp Quartzite, specific gravity 3.5 to 3.6, refractive index 1.72 to 1.73) Corundum (specific gravity 3.9 to 4.0, refractive index 1.76 to 1.77) Zircon (specific gravity 3.90 to 4.10, refractive index 1.79 to 1.81) Powder of crushed natural or synthetic mineral such as silicon carbide (specific gravity 3.17 to 3.19, refractive index 2.65 to 2.69).

2) Frit or crushed powder or granules of fused phosphorus fertilizer or other similar solid solution obtained as a solid solution of high-refractive index glass or phosphate rock and serpentine, fibrous substance or foam, etc.

Examples of the endothermic inorganic compound include calcined gypsum, alum, calcium carbonate, aluminum hydroxide, hydrosalcite type aluminum silicate, crystal water releasing type, carbon dioxide releasing type, decomposition endothermic type and phase inversion. An endothermic inorganic compound such as a mold can be exemplified.

When the fibrous alkali titanate and, if necessary, the high refractive index inorganic compound and / or the endothermic inorganic compound are mixed and dispersed in the silicone resin, the heat resistant coating for manufacturing the heat resistant sheet according to the present invention is prepared. A mixture is obtained. As a method for preparing the mixed dispersion, all known means can be used. In addition to the above, the heat-resistant coating mixture contains a dispersant and a defoaming agent for uniformly dispersing each component, a colorant for adjusting color and mechanical strength, a resin powder, a flame retardant, and a metal powder. , And other various fillers can be mixed freely. In addition, mixing of metal powder such as copper powder, nickel powder, brass powder, and aluminum powder is preferable from the viewpoint of improving the surface heat reflection effect and the penetration suppressing effect.

The surface of the organic fiber base cloth is coated with the heat resistant coating layer by spray coating, brush coating, roll coating or the like with a mixture for heat resistant coating on the surface of the organic fiber base cloth, or Is a method in which a film obtained by molding the heat-resistant coating mixture is attached to the surface of the organic fiber base cloth, or a method in which the organic fiber base cloth is dipped in the heat-resistant coating mixture and impregnated.

The heat resistant sheet of the present invention is manufactured, for example, as follows. That is, after appropriately adding a curing accelerator and an additive to a mixture of silicone resin, alkali titanate and, if necessary, a high refractive index inorganic compound and / or an endothermic inorganic compound, toluene and xylene are further added if necessary. , An organic solvent such as trichlene is added to prepare a dispersion having an appropriate concentration, and the dispersion is conventionally well-known coating means such as a dipping method, a spraying method, a roll coating method, a reverse roll coating method, or a knife coating method. To one side or both sides of the organic fiber base fabric, and then heat-treating at room temperature or under heating, preferably in the range of 150 to 200 ° C for 1 to 30 minutes to cure the silicone resin, and to integrate it into the aforementioned organic fiber base fabric. Firmly fix it.

The mixing ratio of the silicone resin, alkali titanate, high-refractive-index inorganic compound, and / or endothermic inorganic compound varies depending on the type and particle size of the silicone resin and inorganic compound used, but generally the silicone resin is too small. As a result of insufficient strength of the heat-resistant coating layer, when used as a heat-resistant sheet, defects such as cracks in the heat-resistant coating layer or peeling of the heat-resistant coating layer from the organic fiber base cloth occur. If there is too much silicone resin, the heat resistance will decrease.

Therefore, in the present invention, the amount of alkali titanate blended with 100 parts by weight of the silicone resin is 1 to 200 parts by weight, preferably 30 to 100 parts by weight. When compounding compounds and / or endothermic type inorganic compounds, etc., the total amount of these compounds should be 400 parts by weight, and the amount should be from the same weight to 1/4 weight by replacing with alkali titanate. However, the range of 10 to 300 parts by weight is usually preferable. Incidentally, some or all of these high-refractive-index inorganic compounds and endothermic inorganic compounds can be replaced with commonly used inorganic pigments, inorganic fillers for increasing the amount, inorganic powders imparting flame retardancy, etc. The amount used is preferably 400 parts by weight or less, and more preferably 300 parts by weight or less with respect to 100 parts by weight of the silicone resin.

The heat-resistant sheet of the present invention preferably has a thickness of 0.02 mm or more, and a thickness of 0. More preferably, it is in the range of 05 to 2.0 mm. The thickness of the heat-resistant coating layer is preferably 5 to 2000 μm, more preferably 10 to 1500 μm.

For the purpose of improving the adhesion and durability of the organic fiber base cloth and the heat resistant coating layer, an adhesive substance may be interposed therebetween. In this case, it is not necessary to intervene particularly thickly in order to improve the adhesive strength. The adhesive substance is not used for forming a film, and therefore a substance known as an adhesive can be used. For example, acrylate containing amino group, imino group, ethyleneimine residue, alkylenediamine residue, acrylate containing aziridinyl group, aminoester modified vinyl polymer, aromatic epoxy adhesive, amino nitrogen-containing methacrylate polymer, Other adhesives may be used. In addition, a resin of the same quality as the polymer constituting the organic fiber base cloth such as polyamide-imide or polyimide, an RFL-modified substance, or the like can be arbitrarily selected as the adhesive substance.

In the heat-resistant sheet of the present invention, the heat-resistant coating layer may be formed on only one side, but may be formed on both sides to compensate for the low weather resistance of the organic fiber base fabric. Depending on the usage situation, double-sided formation may be an essential condition. On the other side, depending on the performance required for the sheet, natural rubber, neoprene rubber, chloroprene rubber, silicone rubber, hypalon or other synthetic rubber, or PVC resin, ethylene-vinyl acetate copolymer (EVA) resin, acrylic Resins, silicone resins, urethane resins, polyester resins and other synthetic resins can also be used. In this case, it is more preferable that these resins are flame-retarded.

The thickness of the heat-resistant coating layer is preferably 5 to 2000 μm, particularly 10 to 1500 μm. The heat resistant sheet of the present invention may be formed into a tape shape or a strip shape, or may be a wide sheet cut into a tape shape or a strip shape. Further, the heat-resistant sheet of the present invention can be used in combination with other materials such as foam or net. Further, the heat-resistant sheet of the present invention may be used by covering or wrapping it with a material to be protected, such as an electric wire or a cable.

[0045] further described by the heat-resistant sheet of the embodiment the present invention embodiment.

In Examples 1 and 2 and Comparative Example 1, the following fabric was used as the organic fiber base fabric. Fabric A-Aromatic Polyamide Long Fiber Yarn (Trademark: Kevlar, DuPont) Plain Weave: 195d / 130f × 195d / 130f ─────────────────── 34 threads / 25. 4mm x 34 pieces / 25.4mm Weight per unit: 60g / m ² Tensile strength (average in the warp and weft directions): 149kg / 3cm

In Example 2, the following fabric was used as the organic fiber base fabric. Fabric B-Aromatic Polyamide Spun Yarn (Trademark: Conex, Teijin Ltd.) Plain Weave: 30 ^s / 1 x 30 ^s / 1 ─────────────────── 60 / 25.4 mm x 54 pieces / 25.4 mm Weight: 90 g / m ² Tensile strength (average in the warp and weft directions): 66 kg / 3 cm

In Comparative Example 1, the following fabric was used as the base fabric. Fabric C-glass fiber yarn Turkish satin weave: DE150 1/2 3.3 ^s ─────────────────── 55 pieces / 25.4mm × 51 pieces / 25.4mm Unit weight: 290g / m ²

A coating dispersion having the following composition was applied to both surfaces of each of the above-mentioned cloths A, B and C. Silicone resin solution 100 parts by weight (Trademark: TSR1120, Toshiba Silicone Co., nonvolatile content 30%) Hardener 2〃 Potassium titanate 60〃 (Trademark: Tismo D, Otsuka Chemical Co., Ltd.) Coated dispersion layer is air dried for 5 minutes. Then, heat treatment was performed at 200 ° C. for 5 minutes to form a heat resistant coating layer having a thickness of 0.1 mm.

Each of the obtained heat resistant sheets was subjected to the fire resistance heat insulation test described in JP-A-58-130183. The results are shown in Table 6. Each heat resistant sheet was subjected to JIS-P8115 (1976), "Method for testing folding endurance of MIT type tester for paper and board". The results are shown in Table 6. Each heat-resistant sheet was singer 112W-115 industrial sewing machine (two needles, lock stitch thread feed, for tent), Nomex multifilament thread (500d) was used as the stitch thread, and lock stitch and two straight stitches were used. The stitches were sewn with the number of stitches shown in Table 6, the sewn joint was observed, and the tensile strength was measured. The results are shown in Table 6.

[0051]

[Table 6]

Note (*) ₁ . Evaluation Criteria Evaluation of fireproof insulation performance was classified into the following 5 types. Class A: When a 9 mm thick steel plate for spark generation is melt-cut, there should be no through holes that are harmful to the spark and fire. Class B: When a 4.5 mm thick steel plate for spark generation is melt-cut, there should be no through holes that are harmful to the spark generated and to prevent fire. Class C: When a 3.2 mm thick steel plate for spark generation is melt-cut, there should be no through holes that are harmful to the spark generated and are harmful to fire prevention. Class D: When melting 3.2 mm thick steel plate for spark generation, through holes harmful for fire prevention were generated. Class E: Flame is generated when a 3.2 mm-thick steel plate for spark generation is blown. (Commercial asbestos paper (3A grade) was class E.) (*) ₂ . The joint was torn during sewing. (*) ₃ . Almost infinity

As clearly shown in Table 6, the conventional heat-resistant sheet of Comparative Example 1 has a low folding endurance and is not suitable for applications that are prone to bending, and applications that are subject to violent vibration and fluttering. Moreover, its sewability is also low, and if the number of needles to be moved is increased above about 25 pitch / 10 cm in order to increase the tensile strength of the sewn joint, the tensile strength of the joint will be lowered, and the sewing needle will eventually tear. However, the heat-resistant sheets of the present invention (Examples 1 and 2) exhibited good fire insulation properties, fold resistance and sewability, and sewn joint tensile strength.

Example 3 A fabric having the following structure was used as an organic fiber base fabric. However, as the warp and weft, a polyester multifilament yarn (1000d) and an aromatic polyamide multifilament yarn (1000d) were alternately woven and woven. Plain weave: 1000d × 1000d ─────────────────── 32 threads / 25.4mm × 32 threads / 25.4mm Unit weight: 300g / m ² Thickness: 0.35mm An acrylic resin adhesive (trademark: SC-462, manufactured by Sony Chemical Co., Ltd.) was applied to both sides of the organic fiber base cloth at a coating amount of 30 g / m ² , and the same heat resistant coating layer as in Example 1 was applied thereto. Formed. The heat resistance and heat resistance of the obtained heat resistant sheet were Class B, and the folding endurance, sewability and sewn joint joint tensile strength were also good as in the results of Example 1.

[0055]

[Effect of the device]

 The heat-resistant sheet according to the present invention exhibits good heat resistance, is lightweight and tough, and has excellent resistance to repeated bending and sewing. Therefore, the heat-resistant sheet of the present invention is suitable for fireproof clothing, opening / closing curtains, and other applications that are subject to bending, vibration, fluttering, etc. at high temperatures.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of one embodiment of the heat resistant sheet of the present invention.

FIG. 2 is a sectional explanatory view of another embodiment of the heat resistant sheet of the present invention.

[Explanation of symbols]

 1 ... Organic fiber base fabric 2 ... Heat resistant coating layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B32B 27/18 6122-4F

Claims (4)

[Scope of utility model registration request] 1. A heat-resistant synthetic organic fiber having a melting point or a thermal decomposition point of 300 ° C. or higher of 50% by weight or more, and an organic fiber different from the heat-resistant synthetic organic fiber of 50% by weight or less. An organic fiber base cloth made of a woven fabric, a knitted fabric, or a composite cloth thereof, and 1 to 200 parts by weight with respect to 100 parts by weight of the silicone resin and the silicone resin, which is formed on at least one surface of the organic fiber base fabric. A heat-resistant sheet having a heat-resistant coating layer containing the alkali titanate. 2. The silicone resin comprises at least one selected from an organopolysiloxane-based silicone resin, a polyacryloxyalkylalkoxysilane-based silicone resin, a polyvinylsilane-based silicone resin, and a modified product of the silicone resin. Is something
The heat resistant sheet according to claim 1. 3. The heat resistant sheet according to claim 1, wherein the alkali titanate is potassium hexatitanate or a hydrate thereof. 4. The heat resistant sheet according to claim 1, wherein the different organic fibers are polyester fibers.