JPS61290045A - Flame-retardant film body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flame-retardant membrane, and more specifically, to a fiber membrane with excellent flame retardancy and bending resistance. It is something.

[Conventional technology]

In recent years, there has been a strong demand for synthetic resins to be made nonflammable and flame retardant for use in materials such as building materials, interior materials, various parts for vehicles, ships, aircraft, and electrical appliances, and regulations on their use have also been strengthened. ing.

In particular, flexible membranes have come to be used as building materials such as air domes and tension structures, and in response to the demand for non-combustibility and flame retardancy, non-combustible inorganic fibers are used as base fabrics, for example. Membranes using glass fiber and flame-retardant PVC, silicone resin, fluororesin, etc. as surface coating resin are beginning to be used. However, although these membranes achieve the purpose of flame retardancy, the inorganic fibers used for the base fabric are susceptible to refraction, and the fibers can break due to repeated bending or flapping or vibration in strong winds, reducing strength. There was a drawback that it was forced to do so. As a way to prevent this, methods of supplementing organic fibers with these base fabrics, such as blending, blending, twisting, and blending, have been investigated and have been effective, but due to the differences in elongation and elasticity of organic and inorganic fibers, In addition, there was a danger that the mixed organic fibers would come off due to combustion, melting, etc., and that the flames would penetrate the base fabric and extend upward. Therefore, there has been a strong desire for a flame-retardant membrane that is flame-retardant, has a strong refractive power, has a base fabric that is easily available, and is impenetrable to flames.

[Problem that the invention seeks to solve]

Therefore, the present invention aims to provide a flame-retardant membrane that satisfies flame retardancy, has good bending resistance, does not allow flame to penetrate, and is easily available.

[Means and effects for solving the problems] The flame-retardant membrane of the present invention comprises a base fabric comprising a fabric made of inorganic fibers and a fabric made of organic fibers, and at least one part of this base fabric. It has a flame-retardant coating layer formed on the surface and made of flame-retardant natural rubber, synthetic rubber, or synthetic resin.

The inorganic fibers used for the base fabric of the flame-retardant membrane of the present invention can be selected from asbestos fibers, ceramic fibers, silica fibers, glass fibers, carbon fibers, and metal fibers.

In addition, the organic fibers used for the base fabric are natural fibers, for example,
Regenerated fibers such as cotton, linen, etc., such as viscose rayon, cupro, etc., semi-synthetic fibers, such as g- and tri-acetate fibers, and synthetic fibers, such as nylon 6, nylon 66, polyester (polyethylene terephthalate, etc.) fibers, It can be selected from aromatic polyamide fibers, acrylic fibers, polyvinyl chloride fibers, polyolefin fibers, and insolubilized or hardly soluble polyvinyl alcohol fibers.

The fibers in the base fabric may be in any form such as short fiber spun yarn, long fiber yarn, split yarn, or tape yarn, and the base fabric may be a woven fabric, a knitted fabric, a nonwoven fabric, or a composite fabric thereof. It's okay. However, in consideration of the strength and bending resistance of the sewn portion, a woven or knitted fabric is preferable as the base fabric, and a woven fabric is more preferable. Further, as for the form of the fibers, it is preferable that the fibers are in the form of long fibers (filaments) which have little elongation under stress, and are preferably in the form of a plain woven fabric. However, there are no particular limitations on the weaving structure or its form. The base fabric is useful for maintaining the mechanical strength of the resulting flame-retardant membrane at a high level.

When glass fibers are used, there are no particular limitations on their type or thickness, but in general, beta yarns with a thickness of about 2 to 10 μm, particularly about 3 μm, are commonly used.

The present invention is characterized by separately preparing an inorganic fiber fabric and an organic fiber fabric and using them in combination.The inorganic fiber fabric improves the flame retardant and noncombustible properties of the membrane and prevents flame penetration. It is something. Therefore, the inorganic fiber fabric must be densely structured to the extent that flame penetration is inhibited. The thickness is not particularly limited, but as long as the above conditions are met, the thinner the better. Of course, it is acceptable to contain some organic fibers as long as the above conditions are met, but it is preferable that the organic fibers are contained only to the extent that they assist the spinnability of glass fibers, etc., and do not contain any more organic fibers.

The fabric made of organic fibers particularly contributes to improving the flexibility, and the amount thereof should be as small as possible for the purpose of flame retardancy, and therefore a sparsely structured fabric is preferable. Of course, there is no problem even if inorganic fibers are mixed. Furthermore, since organic and inorganic fiber fabrics are used simultaneously, it is preferable that the organic fiber fabric has a sparse structure in terms of flexibility, texture, and handling. However, there is no problem even with a dense fabric structure as long as it satisfies the required performance conditions.

In the flame-retardant membrane of the present invention, it is preferable that the organic fibers contained in the base fabric include heat-resistant organic synthetic fibers having a melting point of 300° C. or higher or a thermal decomposition point. The first polymer that forms such high melting point or high decomposition point fibers is
There are some as shown in the table.

Among the heat-resistant polymers shown in Table 1 below, polymetaphenylene isophthalamide and polyparaphenylene terephthalamide are particularly common, and para-aramid fibers other than those mentioned above include rHM-50J of Kijin ■. can also be used.

Aromatic polyamides useful in such fibers also contain at least 50 mole percent of the following formulas (I) and (■), -fA'',
-CONH+-(■) →Ar+ C0NHArz-NHCO← (IF)
In the above formula, Ar and Arz represent a divalent aromatic group,
These may be the same or different from each other.] Preferably, the main repeating unit is at least one selected from the following units. In the above formulas (I) and (II), the divalent aromatic groups represented by Ar and Arz are represented by the following formula, [wherein A is -o-, -s
-, -5o-.

-SO□-, -Co-, -CH,- or C(CH:l
) represents 2-] is preferably selected from the aromatic residue group represented by the following. These aromatic residues may contain inert substituents such as halogen, alkyl groups, and nitro groups.

Generally, as aromatic polyamides, those having repeating units represented by the following formula as a main component are more preferable.

In addition to the above-mentioned heat-resistant organic synthetic fibers, fluorine-based fibers and other fibers can also be used as long as they have a melting point or decomposition point of 300° C. or higher.

The organic and inorganic fiber fabrics obtained in this way may be used in combination, either individually, or in an appropriate combination if necessary. Generally, the fabrics are bonded or embedded with a polymer, but stitching and other known methods can also be used as the polymerization method, and special It is not limited. Such a base fabric is coated on one or both sides with a flame retardant polymer.

In the present invention, a flame-retardant waterproof layer is formed on the surface or both front and back surfaces of a fibrous base fabric to form a waterproof sheet. Materials for this waterproof layer include natural rubber, neorene rubber,
Chloroprene rubber, silicone rubber, fluorine rubber, Hypalon and other synthetic rubbers, or PvC resin, ethylene-
Vinyl acetate copolymer (EVA) resin, acrylic resin, silicone resin, urethane resin, polyethylene (PE
) resin, polypropylene (PP) resin, polyester resin, fluororesin, and other synthetic resins can be used. The waterproof layer made of such a material has a thickness sufficient to provide the resulting waterproof sheet with desired waterproof properties, flame retardancy, and mechanical strength, for example, 0.05 m or more, preferably 0.05 m or more. 1. It has a thickness of On.

These waterproof layers are coated on the fibrous base fabric by known methods such as topping, calendering, coating, and dipping using rubber or resin films, solutions, pastes, or straights as described above. can be formed. In these rubbers or resins,
Plasticizers, stabilizers, colorants, ultraviolet absorbers, and other functional agents and flame retardants may also be included.

Particularly preferred are PVC, silicone resin, and fluororesin.

In the present invention, the polyvinyl chloride resin used to form the flame-retardant coating layer is, for example, vinyl chloride homopolymer, vinyl chloride-vinyl acetate copolymer, vinyl chloride-ethylene copolymer, vinyl chloride -Vinyl chloride copolymers such as a copolymer obtained by graft-polymerizing vinyl chloride onto an ethylene-vinyl acetate copolymer can be mentioned.

The vinyl chloride resin applied to the present invention includes smoke reducing agents such as borates and zinc compounds, and aluminum hydroxide,
In addition to flame retardants such as barium sulfate, commonly used plasticizers, stabilizers, flame retardants, fillers, pigments and other additives may be added.

Borates used in smoke reducing agents include calcium borate,
Suitable are magnesium borate, barium borate, etc., zinc compounds such as zinc oxide, zinc carbonate, etc., and iron compounds such as ferrous oxalate, ferrous fumarate, black iron oxide, etc.

Examples of plasticizers include phthalic acid esters such as dioctyl phthalate, diisodecyl phthalate and dibutyl phthalate, aliphatic dibasic acid esters such as dioctyl adipate and dioctyl sebacate, or epoxidized soybean oil and epoxidized linseed oil. A plasticizer or the like is used.

In addition, flame retardants include chlorinated paraffin, aliphatic, cycloaliphatic or aromatic halogen compounds, tricresyl phosphate, tris-2,3-dibromopropyl phosphate, tris-2,3-dichloro Propyl phosphate etc. are used, and fillers include calcium carbonate, silica,
Aluminum silicate and the like are suitable.

The vinyl chloride resin composition applied to the base fabric is paste,
A film or the like is preferred, and the paste is prepared by diluting a resin composition with a nonflammable organic solvent and dipping, knife coating, roll coating, etc., and the film is mainly applied using a calendar machine. Normally, after applying and fixing the paste, a film is attached to one or both sides of the base fabric, and the total amount of resin applied to the base fabric is reduced to 100 to 300.
It is regulated to g/rd.

The paste is uniformly applied to the base fabric and completely penetrated into the threads, then dried at about 1300 to 150°C for about 1 to 5 minutes, and then heat-treated in a high temperature atmosphere of 180'' to 200°C to gel. It will be done.

Further, the same resin composition film is usually attached to one or both sides of the base fabric. Film is 0.04-0.20R1
It has a uniform thickness of about /I11 and is attached to the base fabric by heating and pressing using a calendar machine. The weight of the resin composition fixed to the entire base fabric is preferably in the range of 100 to 300 g/rd. If it is less than 100 g/r, the base fabric cannot be completely covered, and if it is less than 300 g/r
r? If it exceeds this amount, there is a risk that the resin content will be excessive with respect to the base fabric, which will cause smoke generation and an increase in the amount of heat generated during combustion.

The flame-retardant film body obtained in this way does not emit smoke during combustion.
It has a low calorific value, and has a smoke emission coefficient of 120 or less in the surface test according to the "Flame Retardant Test Method for Building Interior Materials and Construction Methods" stipulated in JISA-1321 (1975).
60 or less, or 30 or less.

In addition, since the base fabric is uniformly covered with a continuous film, a flame-retardant film body that can withstand water pressure of 1500+*/m or more and has appropriate strength can be obtained.

In the present invention, the flame retardant coating layer may be formed of a fluorine-based polymer, and the fluorine polymer may be polytetrafluoroethylene, tetrafluoroethylene-perfluoroolefin copolymer (for example, tetrafluoroethylene-perfluoroolefin copolymer). (xafluoropropylene copolymer), tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-perfluoroalkyl ethylene copolymer, polychlorotrifluoro Preferably, it contains at least one selected from ethylene, polyvinylidene fluoride, polyvinyl fluoride, chlorotrifluoroethylene-ethylene copolymer, and the like.

Among the above-mentioned fluorine-containing resins, a blend of a resin having a melting point of 300° C. or less and an alkali titanate is particularly preferred for forming the heat-resistant coating layer of the present invention.

Although these fluorine-containing resins have extremely good weather resistance, ultraviolet absorbers may be blended into these resins for the purpose of protecting the base fabric. It goes without saying that colorants and other performance-imparting agents may also be added. The coating layer made of these resins may be microporous,
It may also have continuous or discontinuous cells.

The silicone resins used in the present invention include organopolysiloxane silicone resins, polyacryloxyalkylalkoxysilane silicone resins, polyvinylsilane silicone resins, modified products of the silicone resins, and silicone rubbers obtained from these silicone resins. It is preferable to use at least one type selected from the following.

The organopolysiloxane resin used in the present invention is
It has at least one organic substituent such as vinyl group, allyl group, hydroxyl group, alkoxyl group having 1 to 4 carbon atoms, amino group, mercapto group, polydimethylsiloxane silicone resin, polydiphenylsiloxane silicone resin, It includes polymethylphenylsiloxane silicone resins, resins made of copolymers thereof, and the like.

Polyacryloxyalkyl alkoxysilane silicone used in the present invention HuJ = C, general formula (R is a monovalent hydrocarbon group having 1 to 10 carbon atoms, R' is hydrogen or a monovalent carbide having 1 to 10 carbon atoms) Hydrogen group, R# is a divalent hydrocarbon group having 2 to 10 carbon atoms, and n is 1 to 3
is an integer. ) It includes a copolymer of an acryloxyalkylalkoxysilane represented by the following formula and at least one ethylenically unsaturated monomer.

Furthermore, the polyvinylsilane silicone resin used in the present invention has the general formula % [where R' is the same as above, B is OR', or OR'-O
It also includes a copolymer of a vinylsilane compound represented by R'(R' and R'' are the same as above) and at least one ethylenically unsaturated monomer.

The above-mentioned ethylene monomer is contained in the silicone resin in an amount of 1 to 5.
It may be copolymerized with a content of 0% by weight. Such monomers include, for example, styrene, methylstyrene, dimethylstyrene, ethylstyrene, chlorostyrene, bromostyrene, fluorostyrene, nitrostyrene, or acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate. ,
Methyl methacrylate, ethyl methacrylate, butyl methacrylate, acrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, acrylonitrile, methacrylonitrile,
Examples include 2-chloroacrylonitrile, vinyl acetate, vinyl chloroacetate, vinyl butyrate, vinyl chloride, vinyl bromide, vinyl fluoride, vinylidene chloride, vinyl halogen compounds, and vinyl ethers.

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

In the present invention, one type or a mixture of two or more types selected from these organopolysiloxane silicone resins, polyacryloxyalkylalkoxysilane silicone resins, polyvinylsilane silicone resins, and modified products of these silicone resins is used. can. However, when emphasis is placed on self-extinguishing properties, the organopolysiloxane silicone resin should contain preferably 70% or more of the polysiloxane component in the silicone resin, the polyacrylooxyalkylalkoxysilane silicone resin, and the like. In the polyvinylsilane silicone resin, the content of the ethylenically unsaturated monomer to be copolymerized is preferably 50% by weight or less, particularly 20% by weight or less. Furthermore, when flexibility is important as well as self-extinguishing property, unmodified organopolysiloxane silicone resin is preferred.

These silicone resins may be in the form of solids, plastic pastes, liquids, or dispersions such as emulsions at room temperature, and may be used by adding an appropriate solvent if necessary. In terms of the curing mechanism, silicone resins are classified into room temperature curing type, heat curing type, ultraviolet ray curing type, and ultraviolet ray or electron beam curing type, but they generally contain curing agents and curing accelerators well known to those skilled in the art, such as zinc, lead, and cobalt. , metal carboxylates such as iron, organic tin compounds such as dibutyltin octoate and dibutyltin laurate, titanium chelate compounds such as tetrapropyl titanate and tetraoctyl titanate, N-N
- A desired three-dimensional network can be created by using a combination of tertiary amines such as dimethylaniline and triethanolamine, peroxides such as benzoyl peroxide, dicumyl peroxide, and t-butyl peroxide, and platinum-based catalysts. hardens into a shaped structure.

The heat-resistant coating layer made of the above polymer of the present invention may contain inorganic additives such as silica additives, asbestos fibers, mica, high refractive index inorganic compounds, or heat-absorbing inorganic compounds. High refractive index inorganic compounds have excellent shielding performance against radiant heat, and when endothermic inorganic compounds come into direct contact with slag during welding or fusing, they are heated at this contact surface, and an endothermic reaction occurs during decomposition, lowering the temperature of the slag. lower.

Therefore, the above-mentioned inorganic compound can suppress the collapse and penetration failure of the coating layer of the present invention, and can further protect the sheet base material.

The heat-resistant and flame-retardant coating layer may be formed from the above-mentioned resins, but these materials contain 1 to 30% of the weight of these materials.
0%, preferably 100-250% of other inorganic additives,
For example, silica-based additives, alkali titanate-based additives, asbestos fiber, mica, other inorganic heat-resistant materials, high refractive index inorganic compounds, or endothermic inorganic compounds may be added.

Inorganic additives serve to reinforce the polymer layer, and include various inorganic substances such as titanium oxide, mica, alumina, talc, glass fiber powder, rock wool fine fibers, silica powder, and clay. When it is desired to provide a sheet with surface smoothness, it is generally preferable to use a fine powder having a diameter of 50 μm or less so as not to impair the surface smoothness of the sheet.

Among inorganic additives, it is particularly effective to use alkali titanate to improve the heat resistance of the product. That is, the alkali titanate is used by being blended into the resin, and allows the membrane of the present invention to maintain sufficient flame retardant properties.

The alkali titanate will be explained in more detail.

Alkali titanate has the general formula MzO-nTiOz ・
mH,0 (in the formula, M represents an alkali metal such as Li, Na, etc., n represents a positive real number of 8 or less, and m is 0 or 1
Represents the following positive real numbers. ), and more specifically, LiaTtOaLizTIO
Alkali titanate with a salt type structure represented by s (0<n<1.m=o), N a zT i 70161 Kz
T i bors ・KzT i 1101? (n<3
．． m=0), and an alkali titanate having a tunnel structure. Among these, the general formula Kg0 ・6Ti
Potassium hexatitanate and its hydrate, represented by OzmHzO (in the formula, m is the same as above), can be used for fire resistance,
This is preferable in that it greatly improves the heat insulation properties. Not only potassium hexatitanate but also alkali titanates are generally in the form of powder or fibrous microcrystals.
μm or more, and aspect ratios of 20 or more, especially 100 or more, bring about favorable results in improving the strength of the heat-resistant sheet of the present invention. In addition, fibrous potassium titanate has a high specific heat and excellent heat insulation performance, and is particularly preferable for realizing the performance of the fire-resistant and heat-resistant sheet of the present invention.

The alkali titanate can be used as it is, but in order to achieve better reinforcing hardening, it is necessary to use an alkali titanate of 0.05 to 1
．． It is preferable to use fibers whose surfaces have been treated with about 0% by weight of a silane coupling agent such as γ-aminopropyltriethoxysilane, γ-glycidoxybrobylotrimethoxysilane, etc. .

Furthermore, 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 slag during welding or fusing, they are heated at this contact surface, and when decomposed, an endothermic reaction occurs, lowering the temperature of the slag. let Therefore, the above-mentioned inorganic compound can suppress the collapse and penetration failure of the coating layer of the present invention, and can further protect the membrane base material.

The high refractive index inorganic compound useful in the present invention may have a refractive index of 1.5 or more, but those with a specific gravity of 2.8 or more are particularly suitable, and examples thereof include the following: .

Dolomite (dolomite, specific gravity 2.8-2.9, refractive index 1.50-1)
．． 68) Magnesite (rhizoite specific gravity 3.0-3.1 refractive index 1.51-1
．． 72) Arabite (2.9-3.0 1.63-1.68) Apatite (Apatite 3.1-3.2 1.63-1
, 64) Spinel (Spinel 〃3.5~3.6 //1.72~1
．． 73) Corundum (〃3.9~4.0〃1.76~1.77) Zircon (〃3.90~4.10〃1.79~1.81
) Silicon carbide (〃3.17~3.19〃1.65~2.68)
Powder of crushed natural or synthetic minerals such as

2) Fine powders or granules, fibrous materials or foams of frit or high refractive glass or dissolved phosphorous fertilizer obtained as a solid solution of phosphate rock and snake ore or other similar solid solutions.

In addition, endothermic inorganic compounds include calcined gypsum, alum, calcium carbonate, aluminum hydroxide, hydrosalcite-based aluminum silicate, etc., crystal water releasing type, carbon dioxide gas releasing type, decomposition endothermic type, phase change type, etc. Examples include type inorganic compounds.

Alkali titanate, and optionally a high refractive index inorganic compound,
By mixing and/or dispersing an endothermic inorganic compound in a resin, a preferable coating mixture for producing a membrane body according to the present invention can be obtained. All known means can be used to adjust the mixing and dispersion. In addition, the above-mentioned coating mixture contains a dispersant and a defoaming agent for homogeneously dispersing each component.
Colorants, resin powders, flame retardants, metal powders, and various other fillers can be freely mixed in to adjust color, mechanical strength, etc.

Incidentally, it is preferable to mix metal powder such as copper powder, nickel powder, brass powder, aluminum powder, etc. from the viewpoint of improving surface heat, reflection effect, and penetration suppressing effect.

The surface of the base fabric can be coated with a heat-resistant coating layer by applying a coating mixture to the surface of the base fabric by spraying, brushing, roll coating, etc., or by molding a dipping mixture. There is a method in which a film is attached to the surface of a base fabric, or a method in which the base fabric is immersed in a coating mixture to be impregnated.

Resin and alkali titanate and high refractive index inorganic compounds,
The blending ratio of the alkali titanate and the high refractive index inorganic compound and/or the endothermic inorganic compound varies depending on the type and particle size of the resin and inorganic compound used. If the resin content is too low, the strength of the coating layer will be insufficient, resulting in cracks in the coating layer when used as a heat-resistant and flame-retardant film. This causes disadvantages such as the coating layer peeling off from the base fabric.

Therefore, in the present invention, the amount of alkali titanate added to 100 parts by weight of the resin (hereinafter referred to as parts by weight) is preferably 1 to 200 parts, more preferably 30 to 100 parts. preferable.

Furthermore, when blending a high refractive index inorganic compound and/or an endothermic inorganic compound, etc. with these, it can be blended up to 400 parts by replacing it with alkali titanate corresponding to the same weight to 174 parts, but usually 10 parts A range of 300 parts is preferred. Note that part or all of these high refractive index inorganic compounds and endothermic inorganic compounds can be replaced with commonly used inorganic pigments, inorganic extender fillers, inorganic powders that impart flame retardancy, etc. The amount used is resin 100
The amount is preferably 400 parts or less, more preferably 300 parts or less.

A flame retardant may be used in combination to enhance the effects of the present invention. The flame retardant used here is not particularly limited, but examples include phosphate ester type,
Organic flame retardants such as organic halogen compound type and phosphazene compound type; crystal water releasing type, carbon dioxide gas releasing type, decomposition endothermic type such as calcined gypsum, alum, calcium carbonate, aluminum hydroxide, and hydrosalcite aluminum silicate; There are inorganic flame retardants such as endothermic decomposition type inorganic compounds made of inorganic compounds such as phase conversion type and antimony compounds.

In order to improve the adhesion and durability between the base fabric and the coating layer,
An adhesive substance may be interposed between the two.

In this case, there is no need to interpose the layer thicker than to improve adhesive strength. Adhesive substances are not used for film formation (therefore, substances known as adhesives can be used; for example, acrylates containing amino groups, imino groups, ethyleneimine residues, alkylene diamine residues, Acrylates containing aziridinyl groups, amino ester-modified vinyl polymer-aromatic epoxy adhesives, amino nitrogen-containing methacrylate polymers, and other adhesives may be used in combination.Fiber base fabrics such as polyamideimide and polyimide may also be used. It is also possible to arbitrarily select a resin of the same quality as that of the resin used, an RFL modifying substance, or the like.

There are no particular limitations on the weight or thickness of the coating layer, but generally 1
0-1000 g/nl, preferably 50-300 g/nl
A weight of r+f is preferred.

In the heat-resistant and flame-retardant film body of the present invention, the heat-resistant and flame-retardant coating layer may be formed only on one side, but may be formed on both sides to compensate for the low weather resistance of the base fabric. Depending on the situation, double-sided formation may be an essential condition. Also,
The other side may be made of natural rubber, neoprene rubber, chloroprene rubber, silicone rubber, fluorine rubber, Hypalon or other synthetic rubber, or ethylene-vinyl acetate copolymer (EVA) resin, acrylic resin, or silicone, depending on the performance required for the membrane. Resins, fluororesins, urethane resins, polyester resins and other synthetic resins can also be used. In this case, these resins need to be flame retardant.

Furthermore, a coating layer of fluororesin, acrylic resin, or the like may be formed on the outermost surface for the purpose of improving weather resistance and antifouling properties.

〔Example〕

An extremely dense glass fabric having the following specifications was prepared as an inorganic fiber fabric (the glass fiber filament yarn used is ECD225110 yarn for both the warp and weft, and the fabric is warp and weft 6).
0 x 58 /1nch, plain weave, weight 105 glr
d, thickness 0.1 m/m).

Organic fiber fabric polyester filament thread pitch of approximately 3.5n These inorganic and organic fiber fabrics are layered one by one and treated with the following treatment agent to form a polymer layer on the outside with the fabric present in the middle. , stuck.

Example 1 It was treated with the following resin composition.

D, O, P (plasticizer) 70 Barium borate (smoke reducer) 20 Aluminum hydroxide (flame retardant) 100 Barium sulfate (flame retardant) 200 Ba-Zn stabilizer 2 Cyanine blue (pigment)
3. The paste of the resin composition was coated by dipping, dried at 150°C for 2 minutes to scatter the diluent, and then heat treated at 185°C for 1 minute to fix the resin to the base fabric at a ratio of 10g/rd. I forced it. Next, a film made of the same resin composition was attached to one side of the base fabric using a calendar, so that the total amount of resin adhered to the base fabric was 200 glrd.

Example 2 Acrylic adhesive (SC462,
(manufactured by Sony Chemical Co., Ltd.) at a coating amount of 30 g/rrf and dried.

In order to prepare a coating composition/product, a mixture having the following composition: 0.65 of a water-soluble acrylic resin (thickener) was prepared. The viscosity of this mixture was approximately 900 centipoise.

The base fabric was dipped in the composition and squeezed for 25 minutes.
Gradually raise the temperature to 0 to 300°C, then dry at 350°C.
It was fired at a temperature of The amount of total resin that adheres to the base fabric is 20
0 g/n? (Note that in this example, Kevlar yarn was used as the organic fiber fabric with the same specifications as in Example 1).

Example 3 A coating dispersion having the following composition was applied to both sides of each.

Hardening agent 2
Mica powder 50
The applied dispersion layer was air-dried for 5 minutes and then heated at 200°C for 5 minutes.
Heat treatment was performed for a minute to form a coating layer with a fixed resin amount of 200 g/n.

Comparative Example 1 The same PVC processing as in Example 1 was performed only on the glass inorganic fiber fabric.

Comparative Example 2 Polyester filament: A 23 x 23 fabric was made (dense like the glass fabric) and subjected to the same PVC processing as in Example 1.

The following evaluations were performed on each of the above flame-retardant membrane bodies.

The flame retardant property evaluation, waterproof property and flexibility test of the membrane body according to the present invention were conducted as follows.

B. Flame retardancy determination Base material tests and surface tests are conducted based on the flame retardant test method shown in JISA-1321 (1975) (Enforcement Order of the Building Standards Act). Semi-incombustible, flame retardant, surface test Ministry of Construction Publication No. 3415 The test specimen in the surface test has no melting, cracking, deformation, or generation of toxic gas, afterflame time is less than 30 seconds, and the exhaust temperature curve is the standard temperature curve. It was determined based on the smoke generation coefficient (CA) per unit area.

0 Waterproof JISL-1079 Chemical Fiber Test Method 5.24.1
．． Using method A, the water level (tm) when water droplets appeared from three locations on the back side of the test piece was measured.

C. Folding strength: JIS-P8115 (1976),
The test was carried out in accordance with the "Folding strength test method for paper and paperboard using an MIT type tester".

Table 2 shows the performance of the various membrane bodies obtained.

As can be seen from the table, in Comparative Example 2, the flame penetrated and caused no problem. Although Comparative Example 1 has good flame retardancy, it lacks bending durability and its usage is limited. All of the Examples according to the present invention had extremely favorable flame retardancy and bending strength.

In particular, even when the flame of a burner was separately applied at a right angle to the burner, no penetration of the flame was observed. The results of using a separately prepared base fabric in which organic fibers and inorganic fibers were evenly mixed in the same proportions showed that the organic fibers disappeared over time, and very few fibers of the fabric melted and were missing, creating voids. This resulted in flame leaking onto the surface of the base fabric from the small space created by the flame.

〔Effect of the invention〕

The heat-resistant and flame-retardant film body according to the present invention exhibits good heat-resistant and flame-retardant properties, is lightweight and strong, and is also excellent in bending resistance and base fabric availability. Therefore, the heat-resistant and flame-retardant film body of the present invention can be used as a fire-resistant layer, as a building material and as an interior material for gymnasiums, warehouses, markets, playgrounds, factories, parking lots, various accommodation facilities, etc. where fire is expected. Suitable for materials such as tents, awnings, blinds, sheets, partitions, etc., and other applications that are subject to significant bending, vibration, flapping, etc.

Claims (1)

[Scope of Claims] 1. A base fabric comprising a fabric made of inorganic fibers and a fabric made of organic fibers, and a flame-retardant natural rubber, synthetic rubber, or synthetic resin on the surface or both sides of this base fabric. A flame-retardant membrane body comprising a waterproof coating layer. 2. The membrane body according to claim 1, wherein the inorganic fibers are selected from asbestos fibers, ceramic fibers, silica fibers, glass fibers, carbon fibers, and metal fibers. 3. The membrane body according to claim 1, wherein the organic fiber is at least one selected from natural fibers, regenerated fibers, semi-synthetic fibers, and synthetic fibers. 4. The membrane body according to claim 1 or 3, wherein the organic fibers include heat-resistant organic synthetic fibers having a melting point or thermal decomposition point of 300° C. or higher. 5. The waterproof coating layer is made of natural rubber or neoprene rubber,
The membrane body according to claim 1, which is made of synthetic rubber such as chloroprene rubber, silicone rubber, fluorine rubber, and Hypalon. 6. The membrane body according to claim 1, wherein the waterproof coating layer is made of a synthetic resin such as PVC, acrylic resin, silicone resin, urethane resin, polyethylene resin, polypropylene resin, polyester resin, or fluororesin. 7. The membrane body according to any one of claims 1 to 6, wherein the waterproof coating layer contains a heat-resistant inorganic additive. 8. The membrane body according to claim 7, wherein the content of the heat-resistant inorganic additive is in the range of 1 to 300% based on the weight of the material of the coating layer. 9. The membrane body according to claim 7, wherein the inorganic additive contains an alkali titanate. 10. The membrane body according to claim 9, wherein the alkali titanate is selected from potassium hexatitanate and hydrates thereof. 11. The membrane body according to claim 9, wherein the content of the alkali titanate is in the range of 1 to 200% based on the weight of the coating layer material.