Abstract: The present invention provides a ceiling panel intended for good design which exhibits a light weight, sufficient flexural strength, incombustibility, sound-absorbing properties and heat insulation properties and desirable electric radiation-absorbing properties as an interior ceiling panel that acts as a best member for solving problems with communications by wireless LAN. The present invention also provides an interior ceiling panel having enhanced electric radiation barrier properties attained by applying a metal foil to the foregoing ceiling panel. A novel incombustible sound-absorbing electric radiation-absorbing ceiling panel having a thickness of from 1 mm to 30 mm is obtained by subjecting a water-dispersed slurry of a mixture of from 67 to 92 wt-% of a rock wool, from 0.5 to 8 wt-% of a beaten pulp, from 2 to 13 wt-% of a binder made of an organic resin, from 0.15 to 1 wt-% of a flocculating agent, from 0.5 to 10 wt-% of a natural mineral fiber and from 0.

Abstract: Producing high temperature-resistant technical paper, wherein fibers are mixed with a wet paper material pulp and then technical paper is produced from the pulp by the removal of water from the pulp and resulting compacting of the paper material, it is proposed that the fibers added to the wet pulp are fibers which have been cut and previously thermally pre-shrunk so that in practical use under high temperature conditions the finished technical paper experiences a low degree of thermal shrinkage of less than 1%.

Abstract: A method of vacuum forming of aqueous, fibrous slurries and products produced thereby are disclosed. The method entails forming an aqueous slurry of ceramic fiber, cationic starch and silica sol. The silica has, based on total weight of the sol, about 50% silica having a particle size range of from about 7 nm to about 200 nm and a specific surface area of about 100 m2/gm to about 10 m2/gm. The slurry is passed through a porous screen under a vacuum pressure deposit the solids content onto the screen to produce high strength products.

Abstract: A is a process for preparing insulant boards based on mineral and paper fiber by slurrying mineral fiber, binder and customary additives in water, forming the insulant board by applying the slurry to a wire, and drying and consolidating the insulant board, which comprises using surface-active compounds to achieve faster and better drainage of the filter residues to be dried.

Abstract: A filter media structure, which is capable of operating in the micro- and nanofiltration regime, offers: low cost, durability, high temperature and chemical resistance, high permeability, high flow rate, low pressure drop across the filter media, high mechanical strength, separation efficiency, and biocompatibility. The filter media structure is comprised of mixture of carbon or ceramic fibers and inorganic fiber whiskers generally having a diameter of from about 0.03 to about 5 microns. The present invention further provides a method of preparing a filter media structure comprising mixing together a) inorganic fibers; b) inorganic fiber whiskers; c) a water soluble binder, and optionally depositing a thin layer of pyrolytic carbon on the surface of the inorganic fibers and inorganic fiber whiskers comprising the filter media structure. The filter media structure is selected from the group consisting of a paper, felt and fabric.

Abstract: A mat containing highly machine direction oriented (90% or greater), discontinuous reinforcement fibers, is produced on inclined wire or rotary paper making machinery. Fibers are first uniformly dispersed in an aqueous medium containing thickeners and wetting agents. In one embodiment, antifoaming agents are also added to prevent floating fibers which entangle and reduce orientation. Thermoplastic fibers or particles may also be included. Stock is brought into an open headbox in a flow pattern which allows the fibers to decelerate before approaching the porous suction belt (wire). As the fibers approach the suction belt, the fibers begin to turn and align in the streamline so as to present one end toward the suction wire. The leading ends of the fibers are gripped by the moving belt which drags the fibers out of the dispersion stock in a straight line. The porous mat produced may be dried and bonded through hot air, heat and/or pressure, or chemical binders.

Abstract: A fibrous friction material in a sheet form having a top surface and a bottom surface with at least one surface containing a mixture of from about 10 to 65% cellulose fibers, about 5 to 50% carbon fibers, about 5 to 50% activated carbon, about 1 to 20% novoloid fibers, up to 65% diatomatious earth particles, and latex in an amount sufficient to increase the strength of the said sheet, with said percentages being based on the total weight of said sheet. The material is impregnated with a thermosetting resin prior to use.

Abstract: The present invention is a non-woven fiber mat suitable for reinforcing resilient sheet floor coverings, such as vinyl floor coverings. The non-woven fiber mat is in the form of a sheet of reinforcement fibers which at least includes semi-coiled fibers and can also include coiled fiber, with one or more turns, and even some relatively straight or slightly curved fibers. It is desirable for most, if not all, of the reinforcement fibers to be made from glass. However, it may also be desirable for the reinforcement fibers to include glass fibers and synthetic fibers. It may even be possible for the reinforcement fibers to include only non-glass fibers. At least one polymeric binder is used for bonding together the reinforcement fibers so as to make the fiber mat a suitable substrate for reinforcing resilient sheet floor coverings, such as an interlayer for vinyl floor coverings.

Abstract: Mineral fibers are provided with a phosphorus-containing coating to impart high-temperature resistance without substantially affecting mechanical performance. Preferred mineral-fiber compositions according to the invention with relatively high levels of SiO.sub.2 and low levels of Al.sub.2 O.sub.3 and Fe.sub.2 O.sub.3 compositions may advantageously be used for insulation. Such compositions have high-temperature resistance and high biosolubility, yet have properties which allow current processes to fabricate them into insulation. Preferably, the mineral fibers have a KI value.gtoreq.40.

Abstract: A method for manufacturing a mineral fiber panel which comprises uniformly dispersing in water 60 to 90% by weight of a mineral fiber, 2 to 19% by weight of an organic binder, 1 to 20% by weight of an inorganic microfiber, 0.5 to 3% by weight of a flocculant and 0.5 to 10% by weight of a thermally expansible resin fine particle which has a diameter after expansion of not less than 0.03 mm but less than 3.0 mm, the expansion degree of the above diameter being at least 3 times, and which has an expansion-starting temperature of 50.degree. to 105.degree. C., as the composition components, to prepare a slurry, and thereafter subjecting the slurry to wet forming and then to drying. The above production process enables the enhancement of productivity and the mineral fiber panel obtained by the above production process is light in weight and excellent in sound-absorbing qualities and fireproof properties.

Abstract: An inorganic board consisting of a cured base mat and a cured surface mat is manufactured by forming a surface mat by the dry method on a base mat formed by a paper making method, embossing the composite mat, and curing the embossed composite mat. Ridges each having an enlarged top are formed on the surface of the base mat when a plural number of single mats formed by the paper making method are rolled and laminated around a making roll having a surface on which a plural number of ring grooves are formed. The ridges of the base mat engage the surface mat since each ridge has an enlarged top to improve the interlaminate strength between a cured base mat and a cured surface mat of the resulting inorganic board.

Abstract: A ceramic composite is provided comprising ceramic fibers and microparticles bound together as a porous matrix with a ceramic binder. The ceramic composite is particularly useful for transporting cryogenic fluids.

Abstract: A method of producing a nonwoven fiber glass mat that contains discrete areas which are of different construction than the remainder of the mat. The permeable forming screen onto which a fibrous aqueous slurry is deposited is of a different structure in areas corresponding to the discrete areas of the mat so as to restrict the flow of water through those areas. Less fiber is deposited in those areas, resulting in the discrete areas being comprised of a thinner mat. The orientation of fibers within the discrete areas can be controlled by correlating the restricted flow of slurry in these areas to the flow of slurry necessary to cause this condition.

Abstract: The present invention relates to a reactivable paper and to a process for obtaining it.The paper consists of fibres with a heat resistance .gtoreq.180.degree. C., bonded together by means of a fibrous binder composed of polyamide or aromatic polyester pulp and of a chemical binder consisting of a polyether-imide of an aromatic polyester or of a resin of polyimide type, with a particle size smaller than 100 .mu.m, a softening point of between 50.degree. and 200.degree. C., and a degree of crosslinking of between 0.025 and 0.25. The weight proportion of fibres in the finished paper is generally preferably between 45 and 85%, that of the fibrous binder between 5 and 20%, that of the chemical binder between 10 and 50%.The papers are obtained by a wet route and find wide applications as a function of the degree of conversion of the resin, for example as a dielectric.

Abstract: A chemical composition for use in the papermaking process to produce a paper having enhanced characteristics of brightness, opaqueness, and sizing is provided. The process using the composition to make the paper and the paper made therefrom are also provided by the present invention. The composition employs a cationic softener base, such as the mono- and distearamides of aminoethylethanolamine, to enhance sizing, opacity and brightness. A surfactant, such as an ethoxylated tallow amine or the reaction product of a saccharide and an acid, is used to ensure that the components of the composition remain dispersed therein and that the composition achieves uniform dispersibility on the paper. Another embodiment combines an amphoteric softener, such as a salt of an amphoteric stearic acid derivative, the cationic softener base, an acid, such as acetic acid, a surfactant, such as POE (15) tallow amine, carbamide, and water.

Abstract: A chemical composition for use in the papermaking process to produce a paper having enhanced characteristics of brightness, opaqueness, and sizing is provided. The process using the composition to make the paper and the paper made therefrom are also provided by the present invention. The composition employs a cationic softener base, such as the mono- and di-fatty acid amides of aminoethylethanolamine, to enhance sizing, opacity and brightness. A surfactant, such as an ethoxylated tallow amine and an acid, is used to ensure that the components of the composition remain dispersed therein and that the composition achieves uniform dispersibility on the paper. To speed the production of the composition, a viscosity controlling agent, such as sodium chloride or sodium acetate, may be added thereto. The composition is added to pulp slurry during the papermaking process, and a paper made therefrom exhibits excellent qualities of brightness, opaqueness, water repellency and dispersibility.

Abstract: A process for producing an inorganic fiber-based prepreg sheet, which comprises preparing a slurry containing 35-80% by weight of a phenolic resin powder of 0.01-100 .mu.m in average particle diameter, 65-20% by weight of an inorganic fiber (the amounts are based on the total amount of the two) and a nonionic high-molecular fixing agent, making the slurry into a sheet in the same manner as in the paper making, and allowing the sheet to contain a silane coupling agent; and a process for producing an insulating laminate, which comprises laminating a prepreg sheet produced by the above process.

Abstract: A chemical composition for use in the papermaking process to produce a paper having enhanced characteristics of brightness, opaqueness, and sizing is provided. The process using the composition to make the paper and the paper made therefrom are also provided by the present invention. The composition employs a cationic softener base, such as the mono- and distearamides of aminoethylethanolamine, to enhance sizing, opacity and brightness. A surfactant, such as an ethoxylated tallow amine or the reaction product of a saccharide and an acid, is used to ensure that the components of the composition remain dispersed therein and that the composition achieves uniform dispersibility on the paper. Another embodiment combines an amphoteric softener, such as a salt of an amphoteric stearic acid derivative, the cationic softener base, an acid, such as acetic acid, a surfactant, such as POE (15) tallow amine, carbamide, and water.

Abstract: Paper, cardboard or paperboard-like material containing inorganic fibres, inorganic particle-like additives and organic binders and flocculating agents characterized in that(1) the particle-like inorganic additives constitute 40-80% by weight of the dry matter of the material;(2) the inorganic particle-like additives are composed of(2.1) a base filler of which at least 20% by weight has a particle size of <2 .mu.m and not more than 20% by weight has a particle size of >20 .mu.m on the one hand and <0.5 .mu.m on the other hand, and(2.2) an anionic flocculating active pigment of which at least 50% by weight has a primary particle size of <2 .mu.m,(3.1) the organic flocculating agent is a cationic polymeric carbohydrate with an average molecular weight of 100,000 to 2,000,000 and a degree of substitution of 0.01 to 0.3 and is present in a quantity of 0.5 to 6% by weight, based on the dry matter of the material, and(3.2) 1000 g of base filler is unable to bind more than 0.

Abstract: A chemical composition for use in the papermaking process to produce a paper having enhanced characteristics of brightness, opaqueness, and sizing is provided. The process using the composition to make the paper and the paper made therefrom are also provided by the present invention. The composition is made by combining an amphoteric softener such as a salt of an amphoteric stearic acid derivative, a cationic softener base, such as the mono- and distearamides of aminoethylethanolamine, an acid, such as acetic acid, a surfactant, such as POE (15) tallow amine, carbamide, and water. In another embodiment, a saccharide may be employed instead of the amphoteric stearic acid derivative, surfactant and carbamide. To speed the production of the composition, a viscosity controlling agent, such as sodium chloride or sodium acetate, may be added thereto.

Abstract: The present invention relates to a basic composition for the manufacture of a product in sheet form, obtained in particular by the wet method, of the type comprising a mixture of a polymer powder of given granulometry and of fibers, characterized in that it comprises a preferably intimate mixture of:a) at least one elastomer powder, of granulometry less than about 500 .mu.m, called elastomer fine dust, andb) fibers of length less than about 10 mm, selected from the group composed of natural fibers, inorganic fibers and mixtures thereof.

Abstract: A high strength ceramic fiber board having a green strength of at least 300 psi and a green density of less than about 22 lb/ft.sup.3 ; and having a composition comprising 65-97.5% wt. ceramic fiber, 1-10% wt. PVA fiber, 0.5-10% wt. cationic starch, 0-25% wt. clay filler and 1.0-15% wt. colloidal silica.

Abstract: The manufacture of sag-resistant, lightweight structural mineral panels on a foraminous support wire is accomplished by forming a dilute aqueous dispersion of mineral fiber and/or aggregate and an anionically stabilized latex binder, coupling the binder solids onto the mineral fiber materials by adding a small amount of a flocculant such as a cationic polyacrylamide, and passing the slurry onto a first flooded section of the support wire to form an open, entangled, structural mass having water in interstitial spaces of the entangled mass. Water is stripped from the mass and the mass dried without collapse of the open structure by passing heated dry air through the open entangled structure.

Abstract: In a process for molding a fiber molding for a fiber-reinforced composite material with short fibers oriented in one direction, a slurry molding material having short fibers dispersed in a liquid is used, and pressing forces are applied to the molding material from two directions substantially perpendicular to each other within a mold, while removing the liquid.

Abstract: One or more layers of a sheet comprising (1) 60% to 99%, based on the weight of solids, of vermiculite delaminated by mechanical means only, (2) 1% to 40%, based on the weight of solids, of at least one fibrous material and (3) 0.1% to 4%, based on the weight of the vermiculite, of at least one flocculating agent, can be used to protect heat-sensitive substrates such as resin matrix composites from fire or heat.

Abstract: Disclosed is a process for making a composite sheet using papermaking techniques. The composite sheet comprises (1) 20% to 99%, based on the weight of solids, of vermiculite delaminated by mechanical shearing only, (2) 1% to 80%, based on the weight of solids, of at least one fibrous material and (3) 0.1% to 10%, based on the weight of the vermiculite, of at least one flocculating agent.

Abstract: An aqueous dispersion of vermiculite lamellae is provided having incorporated therein from about 0.2 to about 10% by weight of at least one internal sizing agent based on the dry weight of the vermiculite in the dispersion.

Abstract: A novel composite board of mineral wool, perlite, and cellulosic newsprint fibers for use primarily as a ceiling tile is disclosed. The board displays virtually no sag (less than 200 mils) when exposed to high temperature and high humidity while displaying quite acceptable strength. The board is manufactured by selective deposition of a composition of latex and extender particles on the cellulosic newsprint fibers.

Abstract: There is provided a high temperature resistant, insulating inorganic paper for use in high temperature environments. The paper containing a combination of staple ceramic fibers and staple glass fibers interlocked together into a shape sustaining form and having a thickness of from 10 mils to 1 inch. The glass fibers content is from about 0.5 to 10% and the average diameter of the glass fibers is up to about 50 microns.

Abstract: Low density mineral wool structural panels are manufactured by frothing a dilute aqueous dispersion of mineral wool, lightweight aggregate, binder and a small amount of amine-based cationic surfactant onto a non-woven scrim cover sheet, dewatering the mass and drying it. The froth is a mass of weakly resilient bubbles that rapidly dewater and burst to concentrate the solids in the mass. The bubbles are readily broken without loss of the voided structural configuration by a first application of brief pulses of high vacuum followed by further dewatering under vacuum and rapid drying by passing large volumes of air through the voided mass without collapse of the structure to result in lightweight structural mineral wool panels.

Abstract: Ceramic insulation has a mat of intersecting, discrete ceramic fibers bonded with a sol-gel glass binder. A fabric-reinforced glass coating is bonded to at least one surface of the mat. The insulation is prepared by forming a slurry of ceramic fibers, molding the slurry to form a soft felt mat, drying the mat, and incrementally introducing the binder into the mat with a multiple-impregnation technique, which controls shrinkage of the ceramic fiber mat. The fabric-reinforced glass coating is formed by applying a glass fiber cloth to a surface of the ceramic fiber mat and coating the same with a powdered glass. The powdered glass is melted and cooled.The process provides a layering technique that permits formation of a continuous fibrous structure having layers that impart distinct characteristics at desired regions within the structure.

Abstract: A method for the manufacture of very low density mineral wool structural panels on a moving foraminous support wire by frothing a dilute aqueous dispersion of mineral wool is disclosed. The forth, a mass of delicate, non-resilient and non-uniform bubbles among the entangled mineral wool fibers readily breaks, is stripped of water and dried without substantial loss of the highly open, porous structural configuration by a first controlled rate of maturation dewatering followed by brief pulses of high vacuum. Then the open structure is rapidly stripped of remaining water and dried by passing high volumes of heated dry air through the structure with continued vacuum. The drainage water may be recycled in the process to maintain a low level of binder and any frothing aid additions.

Abstract: A novel composite board of mineral wool, perlite, and cellulosic newsprint fibers for use primarily as a ceiling tile is disclosed. The board displays virtually no sag (less than 200 mils) when exposed to high temperature and high humidity while displaying quite acceptable strength. The board, or product without mineral wool or perlite, is manufactured by selective deposition of a latex composition on the cellulosic newsprint fibers.

Abstract: The present invention relates to a process for producing fiber aggregate which includes an orientation step of placing the dielectric fluid containing fibers in the form of short fiber, whisker, or a mixture thereof dispersed therein in a space between a pair of electrodes across which an AC voltage is applied, whereby causing individual fibers in the dielectric fluid to electrostatically orient, with one end pointing to one of electrodes and the other end pointing to the other electrode; and an aggregating step of aggregating the electrostatically oriented fibers while keeping the oriented step, whereby producing fiber aggregate in which the fibers are substantially one-dimensionally oriented.

Abstract: Light-weight building boards which are based on mineral fibers and thermoplastic binders, may furthermore contain fillers, fireproofing agents and water repellents, contain, as the binder, from 4 to 20%, based on the weight of the mineral fibers, of polymers having a glass transition temperature of from 60.degree. to 110.degree. C., and consisting of not less than 60% by weight, based on the copolymer, of (meth)acrylates of alcohols of 1 to 4 carbon atoms and not more than 40% by weight of (meth)acrylonitrile and/or styrene, and additionally contain salts of polyvalent metals with carboxylic acids of 12 to 36 carbon atoms are distinguished by low water absorption and excellent sound-insulating characteristics, are flame-retardant and exhibit dimensional stability even in the tropics.

Abstract: A heat and water resistant paper prepared with ceramic fiber and a 90-10 to 10-90 mixture of magnesium fluorhectorite and guanidinium fluorhectorite provides improved tensile strength. The fluorhectorites are flocculated from lithium fluorhectorite by ion exchange with 1 M solution of magnesium chloride and guanidinium chloride.

Abstract: A method and a device for manufacturing a board- or sheet shaped material with a high amount of glass or mineral wool fibres and produced in e.g. a board- or paper making machine. The purpose of the invention is to provide a wetting of the fibres and a distribution of them in aqueous phase so that they can be mixed with the other ingredients, paper pulp and binding agent, to a mass with the desired composition. The fibres are fed in air stream into a cyclon, after the outlet of which the fibre stream is accelerated under simultaneous supply of water or steam, which replaces the air about the fibres. The wetted fibres are then mixed with paper pulp and binding agent and supplied to a device for producing a board- or sheet-shaped material, such as a board- or paper making machine.

Abstract: The present invention is a composite flooring felt for vinyl flooring containing a blend of latexes and an activator. Also included is a process for preparing the flooring felt composite. The process can additionally contain a wet strength resin and a flocculant.

Abstract: Fibrous sheet composites are prepared by (a) forming an aqueous dispersion comprising asbestiform crystalline calcium M phosphate fibers wherein M is a metal cation selected from the group consisting of sodium and lithium, and mixtures thereof, auxiliary fibers, and a water insoluble organic polymeric binder; (b) distributing and draining the aqueous dispersion on a porous substrate to form a wet sheet-like solid phase or wet web; and (c) pressing and drying the wet web.

Abstract: Substrate composites, well adopted for the production of metallized printed circuits and facilely prepared by, e.g., papermaking procedures, include a central core layer comprising fibrous cellulosic material or flaked mica within a matrix of a thermosetting resin binder, said central core element having coextensively laminated to at least one of the face surfaces thereof, a lamina of a thermosetting resin comprising non-conductive metal oxide filler material distributed therethrough, and said metal oxide being borohydride reduceable and reactive to form unstable metal hydride intermediates.

Abstract: The present invention relates to a process for producing fiber aggregate which comprises a dispersion step of dispersing fibers in the form of short fiber, whisker, or a mixture thereof into a dielectric fluid; an orientation step of placing the dielectric fluid containing said fibers dispersed therein in a space between a positive electrode and a negative electrode across which a high voltage is applied, whereby causing individual fibers in the dielectric fluid to statistically orient, with one end pointing to the positive electrode and the other end pointing to the negative electrode; and an aggregating step of aggregating the statically oriented fibers while keeping the oriented step, whereby producing fiber aggregate in which said fibers are mostly one-dimensionally oriented.

Abstract: There are disclosed gels composed of hydrated phyllosilicates combined with a lattice expanding agent selected from the group consisting of a primary aminocarboxy acid, lysine orotate, and glycylglycine. Both organic and inorganic additions, as well as ion exchange products, are disclosed. The gels, with or without the additions, may be polymerized and may be formed or shaped. Also disclosed are methods for generating the gels and for treating the gels generated.

Abstract: A thermally bonded fibrous product is composed of a sintered blend of ceramic fibers, low-grade silica material and boron nitride.

Abstract: Disclosed are fire-resistant paper-like materials. These materials are prepared by embedding a fabric in a layered inorganic silicate matrix that has an average charge per structural unit that ranges from about -0.4 to -1 and which contains at least some interstitial cations that are selected from the group consisting of guanidine and multiamine derived cations.

Abstract: The present invention is directed to a highly pure, partially stabilized, fibrous zirconia composite for use as thermal insulation in environments where temperatures up to about 2000.degree. C. are utilized. The composite of the present invention is fabricated into any suitable configuration such as a cone, cylinder, dome or the like by vacuum molding an aqueous slurry of partially stabilized zirconia fibers into a desired configuration on a suitably shaped mandrel. The molded fibers are infiltrated with zirconyl nitrate and the resulting structure is then dried to form a rigid structure which may be removed and placed in a furnace. The structure is then heated in air to a temperature of about 600.degree. C. for driving off the nitrate from the structure and for oxidizing the zirconyl ion to zirconia. Thereafter, the structure is heated to about 950.degree. to 1,250.degree. C. to fuse the zirconia fibers at their nexi in a matrix of zirconia.

Abstract: A paper-like product composed of staple fibers oriented substantially in a certain specific direction is provided, wherein the orientation degree of the constituent staple fibers, expressed by the following formula: ##EQU1## is at least 50%. A prepreg is formed by impregnating the paper-like product with a matrix resin. Composite prepregs are formed by laminating a plurality of such prepregs or such a prepreg with a prepreg composed of continuous filaments, in a manner such that the orientation directions of fibers in the prepregs intersect one another. The paper-like product is prepared by scattering a liquid dispersion of staple fibers in the horizontal direction by a centrifugal force, and collecting the scattered staple fibers in the form of a web on a collecting surface continuously moving in the vertical direction.

Abstract: A bonded fibre insulation batt is produced by ragging, teasing and otherwise doffering fibres of wool and/or synthetic or other natural fibres such as monoacrylic, acrylic, polyamide, polyester or cotton fibres, so as to form a sliver with said fibres randomly dispersed. The sliver is passed through a lapper which causes the sliver to lap on itself to form a mat of desired thickness. The sliver is sprayed with a resin emulsion prior to lapping so that the mat produced is throughly impregnated. The resin emulsion can include a fireproofing resin, and preferably a pesticide and a smoke retardant. The impregnated mat passes to a dryer to remove a substantial part of the water content thereof with minimal heating of the fibres. Following the water removal the mat passes to an oven to cure the resin thus forming the insulating batt which can be cut to desired size.

Abstract: There is prepared an aqueous suspension which in addition to water, consists of 2 to 50 weight % of a mixture of bentonite and inorganic fibers, with the portion of inorganic fiber being 1 to 30 weight % and the portion of bentonite being 1 to 30 weight % and wherein the total amount of solids does not exceed 50 weight %. With the suspension there is attained an improvement of the mechanical properties of thermal insulating molded objects which are employed for thermal insulation and which for example, contain pyrogenically produced silica as a filler by delivery of this suspension on the thermal insulating plate. The suspension can also be delivered on thermal insulating molded bodies on which there is pressed a fiber net or a fiber felt. After applying the suspension several thermal insulating molded bodies can be joined together where the coating formed consisting of bentonite and inorganic fibers acts as binder.

Abstract: An exhaust gas filter for diesel particulates, comprising a row of a plurality of channels of honeycomb structure of porous sintered ceramic fiber composite sheet, the ceramic fiber composite sheet being produced by a paper-forming method from a slurry of alumino-silicate fiber and fire clay. The honeycomb structure of the ceramic fiber composite sheet is formed by stacking plane sheets and corrugated sheets one atop the other. The filter exhibits low pressure drop yet highly efficient operation by having a bulk density of the ceramic fiber composite sheet in the range of 0.1 g/cm.sup.3 to 0.8 g/cm.sup.3.

Abstract: A thermally bonded fibrous product is composed of a sintered blend of aluminosilicate fibers, silica powder and boron nitride powder.