JPH0146476B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to an inorganic sheet having fire and chemical resistance and used in various building materials and various industrial fields. [Conventional technology] Traditionally, flame retardant, non-combustible wall materials, building materials such as cardboard, and industrial materials such as packing, gaskets, etc. that are required to be flame retardant or non-combustible and heat resistant,
asbestos fiber, glass fiber, ceramic fiber,
Inorganic fibers such as rock wool fibers, steel fibers, silicon carbide fibers (SIS fibers), and carbonaceous fibers, and organic fibers such as aromatic polyamide and phenolic fibers, singly or in combination, with organic or inorganic binders as necessary. Nonwoven fabrics, woven fabrics, and film-like sheets containing flame retardants and fillers are widely used. These non-woven fabrics and woven fabrics are flame retardant to non-flammable and heat resistant depending on the amount of inorganic filler and inorganic fiber flame retardant added, but if a high degree of heat resistance or fire resistance is required, , nonwoven fabrics, woven fabrics, and film sheets containing inorganic fibers such as high-purity asbestos fibers, ceramic fibers, SIC fibers, carbon fibers, and steel fibers. Among these, nonwoven fabrics, woven fabrics, and film sheets containing asbestos fibers are
In recent years, asbestos fibers have been designated as specified chemical substances, and their use has been restricted from the standpoint of pollution prevention and occupational health, and their use has now been banned in some countries. In addition, ceramic fibers (among ceramic fibers, ceramic fibers with a high alumina content have excellent heat resistance and are expensive. On the other hand, as the silica content increases, the price becomes relatively cheap but the heat resistance also decreases) SIC fibers. , steel fibers, carbon fiber-containing nonwoven fabrics, woven fabrics, and film sheets have high heat resistance and are satisfactory in this respect, but they are expensive, and ceramic fibers have low resistance to acids and alkalis. The current situation is that it is not directly linked to demand expansion. [Problems to be Solved by the Invention] The present invention does not use asbestos fibers or expensive inorganic fibers, but uses inorganic materials with excellent fire resistance and chemical resistance in inexpensive glass fiber woven fabrics and nonwoven fabrics made of inexpensive materials. By combining these, the aim is to obtain something that is nonflammable, resistant to chemicals, and capable of withstanding long periods of time in the high temperature range of 1000 to 1500°C. [Means for solving the problems] The present invention includes 15 to 70 wt% of a synthetic resin binder,
A composition containing 30 to 85 wt% of at least one of colloidal silicic anhydride-blended silicon oxide, zirconium oxide, titanium oxide, and colloidal alumina (all of the above on a solid basis) contains a small amount of lead oxide and tin oxide. By bonding a material containing at least one of the following to an inorganic fibrous woven fabric or non-woven fabric, a fire-resistant and chemical-resistant carbide is formed on the surface of the inorganic fibrous woven fabric or non-woven fabric when exposed to fire heat. It was designed to do so. In addition, the synthetic resin binder is 15 to 70 wt%, and at least one of silicon oxide, zirconium oxide, titanium oxide, and colloidal alumina is 30 to 85 wt%, so that the binding strength of the synthetic resin binder is not reduced and carbide formation is prevented. The amount is set within a range that is not insufficient. Furthermore, the inclusion of 10 wt% or less of carbon black in the synthetic resin binder is intended to ensure that there is no shortage of carbon in the formation of carbides. [Function] The present invention uses a synthetic resin binder as a binder to bind an inorganic material to an inorganic fibrous woven fabric or non-woven fabric, and when exposed to fire heat, the synthetic resin binder carbonizes and becomes a carbon source, producing silicon oxide, zirconium oxide, and oxidized Titanium and the like are fused together with lead oxide and tin oxide as vitrification forming aids to form a carbide together with carbon black on the surface of an inorganic fibrous woven fabric or non-woven fabric. [Constitution of the Invention] Inorganic materials comprising colloidal silicic anhydride compounded silicon oxide, zirconium oxide, titanium oxide, colloidal alumina, lead oxide, and tin oxide, which are nonflammable and impart fire resistance and chemical resistance, constitute the present invention. The material, synthetic resin binder, inorganic fibrous woven fabric, and nonwoven fabric will be explained in detail. Titanium oxide, zirconium oxide, and silicon oxide as inorganic materials are each produced by a drying temperature of 200 to 300 ° C. or thermal decomposition during the manufacturing process of the inorganic sheet of the present invention. It also includes things that are. In the case of titanium compounds, oxides such as titanium oxide, titanic acid, titanium sulfate, titanium chloride, titanium oxyacetylacetonate, titanium alkoxide, acids, inorganic salts, chlorides, organic titanium compounds, and zirconium Compounds include oxides, acids, such as zirconium oxide, zirconic acid, zirconium sulfate, zirconyl nitrate, zirconyl acetate, zirconyl oxychloride, zirconyl oxynitrate, zirconyl ammonium carbonate, zirconyl chloride, zirconium acetylacetonate, zirconium alkoxide, Inorganic salts, chlorides, organic zirconium compounds, colloidal zirconium compounds, silicon compounds such as silicon oxide, colloidal silicic anhydride, silicon tetrachloride, organic silicon ammonium, oxides, acids, inorganic salts, chlorides, organic silicon compounds can be given. Further, lead oxide and tin oxide as inorganic materials include lead compounds and tin compounds produced by drying at a temperature of 200 to 300° C. or thermal decomposition during the manufacturing process of the inorganic sheet of the present invention. Specific examples of lead oxides include lead acetate, lead benzoate, lead oxalate, lead octylate, lead citrate, lead nitrate, lead chromate, lead carbonate, red lead (trilead tetraoxide), lead dioxide, lead oxide, and metal oxide. Lead acid, lead hydroxide, lead molybdate, lead silicate, tin oxide, tin oxide, tin hydroxide, stannous oxide, stannous sulfate,
Examples include stannous acetate and tin oxalate. In addition to the above, it is effective to add colloidal alumina to the inorganic material to improve heat resistance. In addition, in order to reduce costs, inorganic fillers such as clay, mica, talc, glass powder, rock wool fine fibers, magnesium hydroxide, aluminum hydroxide, ammonium polyphosphate, ammonium bromide, phosphoric acid, etc. There is no problem in adding organic or inorganic flame retardants such as guanidine, phosphoric acid silica, and antimony trioxide to the extent that fire resistance and chemical resistance are not impaired. Furthermore, carbon black as an inorganic material is a fine black powder and is usually produced by the furnace method, such as furnace black, acetylene black, thermal black, channel black, disk black, or German naphthalene produced by the impact method. Commercially available products such as Black can be used, and inorganic fibers can be heated in a high-temperature reducing atmosphere.
It is also possible to use a type in which carbon black treated with carbon is fixed and integrated on the surface of inorganic fibers. Examples of this type include carbon black-bound potassium titanate fibers, and also fine carbon fibers such as carbon fibers. Furthermore, part or all of the carbon black may be replaced with a flame retardant that promotes carbonization of pulp, resin, etc. contained in the inorganic fibrous material by heating during the manufacturing process. Examples of synthetic resin binders include vinyl acetate resin, ethylene/vinyl acetate resin, acrylic resin,
Synthetic rubber such as SBR and NBR, emulsion type such as polyvinyl alcohol, starch, polyamide resin, polyimide resin, aqueous solution type, solution type dissolved in organic solvent, thermoplastic resin, melamine resin, phenol resin, epoxy Thermosetting resins such as emulsion type resins, polyester resins, furan resins, aqueous solution types, and solution types dissolved in organic solvents can be used as binders alone or in the form of mixtures, but there is a risk of fire. It is preferable to use a water-soluble type or emulsion type binder due to its properties. The inorganic fibrous woven fabrics and nonwoven fabrics that are the constituent elements of the present invention can be made of the following materials. Inorganic fiber woven fabrics include E glass, lead glass, C
For glass and A-glass composition systems, woven fabrics of glass fibers with a fiber diameter of 15μ or less, mixed woven fabrics made of blended yarns of glass fibers and steel fibers/ceramic fibers, blended yarns of glass fibers, steel fibers, and ceramic fibers. , woven fabrics made of glass fibers, steel fibers, ceramic fibers, and organic fiber blended yarns, or blended fabrics of these blended yarns and glass fibers, and woven fabrics made of blended yarns of glass fibers and organic fibers that are flame retardant to noncombustible. You can use woven fabrics of different colors. However, from the viewpoint of flame retardancy, it is preferable that the blending and weaving ratio of organic fibers is 50 wt% or less. Blended yarn is made by mixing and spinning different fibers such as glass fiber and organic fiber.
This refers to a woven fabric made from this blended yarn (both vertical and horizontal). A mixed woven fabric is one in which, for example, glass fibers and organic fibers are spun individually, and the spun yarns are added vertically or horizontally in an appropriate ratio to form a woven fabric. Inorganic fibrous nonwoven fabric is an inorganic material consisting of 50 to 90% by weight of at least one type of inorganic fiber such as glass fiber, rock wool fine fiber, or ceramic fiber and an inorganic filler, an organic material consisting of pulp, an organic binder, and a binding aid. This is a flame-retardant, non-flammable non-woven fabric obtained by forming paper from a mixture consisting of 10 to 50% by weight of the material as a papermaking raw material composition. As the inorganic fibers, the following glass fibers, ceramic fibers, and rock wool fine fibers can be used alone or in combination. Glass fiber, whose composition is _SiO2 55-65%,
pbO0~60%, _{Al2O3 0} ~15%, _Na2O0 ~15%,
_B2O3 4-12%, _BaO0-5 %, ZnO0-5%,
CaO1~18%, MgO1~6%, K2O0 _~ 4%,
Glass fibers consisting of so-called E, lead, C, and A glass compositions containing 1% or less (all by weight) of trace components such as TiO ₂ and FeO can be used, but there is no limitation as to the suitable fiber length. is from 250
Preferably it is 7000 μm. Ceramic fibers have a composition of _SiO2 5-49%,
_{Al2O3 94-50} % _, CaO, MgO, _B2O3 , _Na2O ,
Ceramic fibers containing 1% or less (by weight) of trace components such as K ₂ O, TiO ₂ , FeO, etc. can be used, but as in the case of the glass fibers, the fiber length is 250 to 7000 μm. It is preferable to use a range. Ceramic fibers suitable for this purpose may be those obtained by cutting commercially available ceramic fibers to adjust the fiber length, or, for example, Tempstrump Eyever Q manufactured by Johns Manville Co., Ltd. can be used. Rock wool fine fibers have a composition of SiO ₂ 35-50%,
_Al2O3 10~15%, CaO20~40%, MgO5 _~ 25%,
It is possible to use a material containing 1% (all % by weight) of trace components such as TiO ₂ , MnO, FeO, etc., and having a fiber length in the range of 70 to 700 μm that does not substantially contain non-fiber particles. As for pulp, general pulps such as plain, ungrained, NL type kraft pulp, linter pulp, recycled pulp, etc. with a fiber length of 500 to 2000 μm and a beating degree (shot par rigler) of about 30 to 60 can be used, as in the case of papermaking. It is. In addition, organic fibers other than pulp include rayon,
Aromatic or aliphatic polyamide fibers, acrylic fibers, poval fibers, polyethylene fibers, polypropylene fibers, vinylidene chloride fibers, etc. can be used in the form of partial substitution of pulp. Examples of organic binders include acrylic resin, styrene/butadiene rubber, acrylonitrile/butadiene rubber, vinylidene chloride resin, emulsion such as ethylene/vinyl acetate resin, thermoplastic resin such as polyamide resin, phenolic resin, epoxy resin, silicone resin, etc. However, when adding these organic binders to the papermaking raw material composition, it is necessary to add anion as a binding aid in order to effectively fix the organic binder to the wet sheet. It is desirable to add a small amount of a cationic flocculant or a cationic flocculant. For example, when 0.5 to 1.5% by weight of sulfate is added to 0.1 to 1.0% by weight of polyacrylamide or sodium polyacrylate as an anionic flocculant, almost 100% of the organic binder is fixed to the wet sheet. Further, as a cationic flocculant, when 0.1 to 1.0% by weight of polyamide/polyamine epichlorohydrin resin is added, the same effect as the anionic flocculant can be obtained. Furthermore, as an organic binder, it is possible to use a small amount of a sizing agent such as glue, alkyl ketten dimer, rosin size, plant size, wax emulsion, etc. in order to impart water repellency to the sheet material. Note that if an organic binder is not added internally, it may be applied to the sheet after paper making. As an inorganic filler, it is effective to combine aluminum hydroxide as a component that imparts flame retardancy through dehydration of crystal water.Other fillers include clay, mica, talc, antimony trioxide, calcium carbonate, silica, and glass powder. , magnesium hydroxide,
There are gypsum and the like, and by using these together with aluminum hydroxide, it is effective to further improve flame retardancy. In the above-mentioned inorganic fibrous nonwoven fabric, the total of the organic components, that is, pulp, organic fibers, organic binder, and binding aid, is particularly limited in order to obtain satisfactory mechanical strength and flame retardance of the nonwoven fabric sheet. However, it is preferably in the range of 10 to 50 wt%. During production, the above-mentioned inorganic material is dispersed and diluted in the above-mentioned synthetic resin liquid, and this dispersion is absorbed into the above-mentioned inorganic fibrous woven or nonwoven fabric by a method such as dipping, spraying, or coating, followed by drying. The inorganic material is bonded to the inorganic fibrous woven fabric or nonwoven fabric by heat curing under pressure or no pressure, and further heat treatment as necessary. The mechanism of action of treating inorganic fibrous woven or nonwoven fabrics with the composition of the present invention to impart fire resistance and chemical resistance is presumed to be due to the following reasons. First, fibers and resin binders work to maintain their shape, especially in the case of nonwoven fabrics, at temperatures below about 200°C.
Subsequently, in the temperature range of 200 to 600℃, the inorganic material is fused to the woven fabric or nonwoven fabric by the action of lead oxide, tin oxide, or a mixture thereof as a vitrification forming aid, and the synthetic resin is thermally decomposed at a higher temperature. Carbon black made of carbon or carbon black from original acid combination and inorganic materials such as titanium oxide, zirconium oxide, and silicon oxide react with carbon to form carbides on the fiber surface (the higher the temperature, the more carbides are formed). ), and when colloidal alumina is further blended, in addition to the formation of these carbides, a highly refractory mullite composition (3Al ₂ O ₃ 2SiO ₂ ) is formed, which improves the performance of these carbides (high melting point). It is presumed that it has become possible to impart nonflammability, fire resistance, and chemical resistance to woven or nonwoven fabrics, reflecting the characteristics of woven fabrics and nonwoven fabrics. In the present invention, the blending ratio of the constituent components of the material that imparts nonflammability, fire resistance, and chemical resistance to the woven or nonwoven fabric is such that the total of carbon black and synthetic resin binder is 15 to 70 wt% in terms of solid content (however, (Containing amount of carbon black is 10wt% or less)) Colloidal silicic anhydride compounded silicon oxide, zirconium oxide,
Total amount of titanium oxide and colloidal alumina: 85~
The amount of lead oxide, tin oxide, or a mixture thereof is in the range of 0.05 to 15 parts by weight per 100 parts by weight of the composition having a proportion of 30 wt%. Total of carbon black and synthetic resin binder (however, the blending amount of carbon black is 10wt% or less)
If the solid content is less than 15 wt%, the amount of synthetic resin binder in the composition will be small, and the force that binds the inorganic material to the inorganic fibrous woven or nonwoven fabric will be small, making it easy to fall off due to external force such as impact. When the treated inorganic fibrous woven fabric or nonwoven fabric is exposed to high temperatures, the amount of carbon black formed is reduced overall when the initially added carbon black or synthetic resin binder is heated to high temperatures, resulting in silicon oxide, oxidized Carbide formation of zirconium and titanium oxide becomes insufficient, and satisfactory fire resistance is not imparted.Also, although the above adhesion strength is fully satisfied at 70wt% or more, the content of the synthetic resin binder becomes 60wt% or more. As the blending ratio of inorganic materials decreases, fire resistance and chemical resistance decrease, and in order to pass JIS A-1322 flame retardant class 1 for thin materials,
Because there are restrictions on the composite ratio that imparts fire resistance and chemical resistance (in this case, fire resistance is also sacrificed),
As a result, it becomes difficult to impart satisfactory fire resistance to inorganic fibrous woven or nonwoven fabrics. If the amount of the synthetic resin binder is increased within the above range, carbon will be formed by high-temperature pyrolysis, so the amount of carbon black can be reduced, and as a limit, the amount of carbon can be reduced to zero.
The upper limit of the amount of carbon black added was set at 10 wt%, but since no improvement in effectiveness was seen even if the amount added was increased beyond this, 10 wt% or less is sufficient considering the combination of other ingredients. The components of the inorganic material are silicon oxide containing colloidal silicic anhydride, zirconium oxide, titanium oxide, and colloidal alumina, which are the total solid content.
The reason why it is 85 to 30wt% is due to the above reason. Its composition includes silicon oxide, titanium oxide, zirconium oxide, and colloidal alumina, either singly or in a mixture, depending on the level of fire resistance and chemical resistance. In particular, it is effective to contain liquid colloidal silicic anhydride in silicon oxide because it has good bonding properties with inorganic fibrous woven fabrics or non-woven fabrics, and has better fire resistance than powdered silicon oxide. It is. Titanium oxide and zirconium oxide also have a positive effect on fire resistance, but they also play an important role in terms of chemical resistance. Regarding colloidal alumina, it is not preferable to mix it in large amounts as it has a slight negative effect on chemical resistance, but this material reacts with inorganic fibrous woven or nonwoven fabrics or silicon oxide at high temperatures and has excellent fire resistance. In order to form a mullite composition (3Al ₂ O ₃ .2SiO ₂ ), it is effective to blend colloidal alumina as necessary. It is important to further add 0.05 to 15 parts by weight of lead oxide, tin oxide alone or a mixture thereof to 100 parts by weight of the composition having the above blending ratio, preferably 0.5 to 10 parts by weight (both calculated as solid content). be. Adding a small amount of vitrification forming aids such as lead oxide and tin oxide can improve the composition of inorganic fibrous woven fabrics or non-woven fabrics, even if the proportion of materials that impart fire resistance and chemical resistance to the inorganic fibrous woven fabric or non-woven fabric is small. Nonwoven fabrics can be given the ability to withstand high temperatures for long periods of time. The reason is as described above, but the effect becomes noticeable when the amount is 0.05 part by weight or more, preferably 0.5 part by weight or more, and the effect increases when the amount is more than 0.5 part by weight. On the other hand, since these vitrification forming aids have a slightly negative effect on resistance to chemicals such as acids and alkalis, they must be avoided in amounts of 15 parts by weight or more. The preferred blending ratio of these components is 3 to 8 wt%. A treatment solution made of the materials in the preferred blending ratio is composited into an inorganic fibrous woven fabric or nonwoven fabric by a method such as impregnation, spraying, or coating, but the composite ratio that imparts fire resistance and chemical resistance is particularly Although not limited to, it is preferable that the amount of the material imparting fire resistance and chemical resistance is preferably 100 parts by weight or less per 100 parts by weight of the inorganic fibrous woven fabric or non-woven fabric in terms of solid content, even if it is 50 parts by weight or less. A sufficient effect can be obtained. The inorganic fibrous woven fabric or nonwoven fabric obtained by processing in this way depends on the resin binder, but usually
In the case of resin binders that require drying at 60 to 110°C and subsequent curing, inorganic fibrous woven materials are cured at 150 to 200°C under pressure or no pressure, and then partially fired if necessary. By performing heat treatment at a temperature below the softening temperature of cloth or nonwoven fabric (usually 250 to 800°C), an inorganic sheet that is nonflammable, fire resistant, and chemical resistant can be produced. It is effective to apply a small amount of resin liquid and dry it to prevent the inorganic material from falling off the sheet. [Effect of the invention] According to the invention, the synthetic resin binder is 15 to 70wt.
% and at least one of colloidal silicic anhydride-blended silicon oxide, zirconium oxide, titanium oxide, and colloidal alumina (all of the above in terms of solid matter), a small amount of lead oxide, Because a material containing at least one of tin oxides is combined with an inorganic fibrous woven fabric or nonwoven fabric, lead oxide and tin oxide will fuse to the inorganic fibrous woven fabric or nonwoven fabric at low temperatures when exposed to fire heat. However, when the temperature rises further, the synthetic resin binder carbonizes, and titanium oxide, zirconium oxide, and silicon oxide react with it to form a carbide on the surface of the inorganic fibrous woven or nonwoven fabric.This carbide has a high melting point and is chemical resistant. Since it has a high carbon content, it can impart nonflammability, fire resistance, and chemical resistance to inorganic fibrous woven or nonwoven fabrics. In addition, since the synthetic resin binder was 15 to 70 wt% and at least one of silicon oxide, zirconium oxide, titanium oxide, and colloidal alumina was 30 to 85 wt%, if the synthetic resin binder was 15% or less, the inorganic fiber woven fabric or The bond with the nonwoven fabric is low, and when carbonized, the amount of carbon is insufficient, so sufficient fire resistance cannot be expected. Moreover, if it exceeds 70%, the relative amounts of silicon oxide, zirconium oxide, titanium oxide, and colloidal alumina to be blended will be insufficient, resulting in a decrease in fire resistance and chemical resistance. Furthermore, if the material contains a high proportion of resin binder, which eliminates the need to incorporate carbon black, it becomes white or pale in color when bonded to an inorganic fibrous woven or nonwoven fabric, and can be colored in any desired color. Furthermore, the adhesion of silicon oxide, zirconium oxide, and titanium oxide to the inorganic fibrous woven fabric or nonwoven fabric is assisted by the vitrification formation aids of lead oxide and tin oxide, which are added in small amounts. By reducing the amount, fire-resistant and chemical-resistant effects can be achieved. In addition, carbon black is added to the synthetic resin binder.
When blended in an amount of 10wt% or less, it is possible to supplement carbon that is insufficient when the amount of synthetic resin binder blended is small. It should be noted that even if the amount of carbon black added is increased to 10% or more, the effect will not be improved, and the amount of other ingredients will be reduced, which is inconvenient. [Example] An example of the present invention will be described. The inorganic fibrous woven fabrics and nonwoven fabrics used in the following examples are as follows. Woven fabric 1 Glass woven fabric Weight 610g/m ² , thickness 0.5mm Made by Nittobo Co., Ltd. Product number Glass cloth WL -
700A Woven Fabric 2 Woven fabric using glass fiber yarn and ceramic fiber/steel/rayon blend yarn in the warp at a ratio of 3:1, with glass fiber yarn as the weft.Weight: 810 g/m ² , thickness: 1.4 mm Nippon Glass Fiber Industries Non-woven fabric manufactured by Co., Ltd. 1 Glass fiber 4wt% Aluminum hydroxide 75wt% N-type kraft pulp 15wt% Modified acrylic resin emulsion 5wt% Polyacrylamide 0.1wt% Sulfuric acid band 0.9wt% Each of the above materials is used as a solid component and the final concentration is 0.5wt%. An aqueous dispersion was prepared using a pulper, paper was made using a fourdrinier paper machine, and then dried to obtain nonwoven fabric 1. The characteristic values of the obtained nonwoven fabric 1 are as follows. Thickness 0.29m/m Weight 235g/m ² Tensile strength 3.8Kg/15mm width Oxygen index 100 Non-woven fabric 2 Rock wool fine fiber 26wt% Ceramic fiber 10wt% Aluminum hydroxide 35wt% N-type kraft pulp 25wt% Modified acrylic resin emulsion 3wt % Polyacrylamide 0.1wt% Band sulfate 0.9wt% The above materials were made into paper and dried in the same manner as Nonwoven Fabric 1 to obtain Nonwoven Fabric 2. The characteristic values of the obtained nonwoven fabric 2 are as follows. Thickness 0.24mm Weight 163g/ ^m2 Tensile strength 4.7Kg/15mm width Oxygen index 76 Oxygen index, fire resistance,
The fusing welding test and chemical resistance are shown in Table 1.

[Table] The raw materials used for nonwoven fabric 1 and nonwoven fabric 2 are as follows. Glass fiber manufactured by Nitto Boseki Co., Ltd.: A glass fiber cut into 6 mm using a roping cutter made by E-glass roping was used. Aluminum hydroxide Manufactured by Showa Light Metal Co., Ltd.; Product name: Higilite H
-21 Mica Manufactured by Kuraray Co., Ltd.; Product Tin Olite Mica G
-325 Polyamide polyamine epichlorohydrin resin Manufactured by Arakawa Chemical Co., Ltd.; Product name: Arafukus 100 Polyacrylamide Manufactured by Arakawa Chemical Co., Ltd.; Product name: A-117 Modified acrylic resin emulsion Manufactured by Toagosei Kagaku Co., Ltd.; Product name: AP-5950 Rock wool fine Fiber Manufactured by Nitto Boseki Co., Ltd.; Product name: Microfiber/NIX Ceramic fiber Manufactured by Johns Manville; Product name: Tempstran
FiberQ. Sulfate band L-type or N-type kraft pulp using commercially available products Commercially available L-type or N-type kraft pulp in dry weight
150g was added to No. 30 and beaten with a small beater for 2 hours to obtain a beating degree of 40. The material concentration of the composition (solid content equivalent) in Attachment Table 2 is 5~
Woven fabrics and nonwoven fabrics shown in the table were impregnated with a 20 wt % aqueous dispersion, and test sheets No. 1 to No. 6 were prepared using the composite ratio (adhesion rate) and drying and curing conditions shown in the table. Test sheets No. 5 to No. 6 were further coated with a synthetic resin to prevent the inorganic material from falling off due to bending. The oxygen index, fire resistance, fusing welding evaluation, and chemical resistance of the obtained test sheets No. 1 to No. 6 are also listed in the same table. Comparing Attached Table 2 with Table 1, it was found that the woven or non-woven fabrics made of the composite materials of the present invention were non-flammable and had excellent fire resistance and chemical resistance (especially in terms of fire resistance) compared to untreated fabrics. It is understood that this will result in a significant improvement. Test method The test method for the tests shown in Tables 1 and 2 is as follows. Fire resistance Test specimen (any size) is heated 1000 to 1100℃ using a propane torch burner at a distance of 10 cm from the surface of the specimen.
A flame test was conducted for 30 minutes, and the time taken for the flame to penetrate through the specimen and for a hole to appear was evaluated. Chemical resistance Approximately 10 gr of the above test specimen was placed in 500 c.c. each of 1N NaOH and 1N HCl aqueous solutions, placed in a sealed plastic container, and immersed in a constant temperature bath at 80°C ± 1°C for 2Hys, with no change in shape. A rating was given for those that did not occur, a rating of B for those that caused slight deformation but no practical problem, and a rating of C for those that caused deformation and required improvement. Oxygen Index Evaluated in accordance with JIS K7201 using an oxygen index combustion tester (manufactured by Suga Test Instruments Co., Ltd.). Welding fusion spark test JIS draft published in 1981, ``Fusion welding spark test -
Gas cutting machine moves at 500-700mm/min, thickness 3.2-9.0
A steel plate of mm was cut by melting, and a test specimen placed 50 cm below caught the spark to check for flame generation and the presence of through holes. Passed Class A... Passed Class B using 9.0mm steel plate Passed Class C using 4.5mm steel plate Used 3.2mm steel plate Raw material phenolic resin Manufactured by Dainichi Ink Co., Ltd.; Product number Plyoven TD-2254, water-soluble resol type phenolic resin colloid Anhydrous silicic acid manufactured by Nippon Shokubai Chemical Co., Ltd.; Cataloid SA
(Solid content 30-31 wt%) Titanium oxide Manufactured by Fuji Titanium Industries Co., Ltd. Rutile type titanium oxide powder Zirconium oxide powder Manufactured by Nippon Metal Chemical Co., Ltd. Zirconia powder carbon black Manufactured by Asahi Carbon Co., Ltd. Furness black Colloidal alumina Nissan Chemical Manufactured by Kureha Chemical Industry Co., Ltd.; Product number: Alumina Sol 200 (concentration 10wt%) Modified acrylic resin; Product number: VAT R-106
Acrylic/vinylidene chloride copolymer resin emulsion epoxy resin Manufactured by Kyoei Yushi Co., Ltd.; Epolite 400E (water-soluble epoxy resin) Lead acetate, lead metaborate Reagent grade 1 (commercially available) aluminum hydroxide Manufactured by Showa Light Metal Co., Ltd.; Product name: Heidi Light H
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Claims (1)

[Claims] 1 A. The synthetic resin binder is 15 to 70 wt%,
A composition containing 30 to 85 wt% of at least one of colloidal silicic anhydride-blended silicon oxide, zirconium oxide, titanium oxide, and colloidal alumina (all of the above on a solid basis) contains a small amount of lead oxide and tin oxide. An inorganic sheet characterized in that it is made by bonding a material containing at least one of the following to an inorganic fibrous woven fabric that is a woven glass fiber fabric or a woven fabric that has glass fiber as its main material. 2 A The synthetic resin binder is 15 to 70 wt%,
A composition containing 30 to 85 wt% of at least one of colloidal silicic anhydride-blended silicon oxide, zirconium oxide, titanium oxide, and colloidal alumina (all of the above on a solid basis) contains a small amount of lead oxide and tin oxide. B. 50 to 90 wt% of an inorganic material consisting of at least one type of inorganic fiber such as glass fiber, rock wool fine fiber, and ceramic fiber and an inorganic filler, pulp, organic fiber, organic binder, and bond. Organic material consisting of auxiliaries
1. An inorganic sheet characterized by being bonded to an inorganic fibrous nonwoven fabric obtained by paper-making a mixture of 10 to 50 wt%. 3. The inorganic sheet according to claim 1 or 2, wherein the synthetic resin binder contains 10 wt% or less of carbon black. 4. The composition according to any one of claims 1 to 3, characterized in that 0.05 to 15 parts by weight of at least one of lead oxide and tin oxide is blended with respect to 100 parts by weight of the composition. Inorganic sheet.