Abstract: A multilayer laminate comprising a first polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, a first adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C., an inorganic refractory layer comprising platelets in an amount of at least 85% by weight with a dry areal weight of 15 to 50 gsm and having a residual moisture content of no greater than 10 percent by weight, a second adhesive layer having an areal weight of from 4 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C. and a second polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 minutes.

Abstract: A multilayer laminate comprising in order, a polymeric film layer capable of withstanding a temperature of at least 200 C for at least 10 min, an adhesive layer having an areal weight of from 2 to 40 gsm capable of activation at a temperature of from 75 to 200 degrees C. and an inorganic refractory layer wherein the refractory layer comprises platelets in an amount at least 85% by weight with a dry areal weight of 15 to 50 gsm and has a residual moisture content of no greater than 10 percent by weight.

Abstract: A method of forming a dilute water slurry for water felting a basemat for an acoustical ceiling tile comprising delivering a bale of compressed mineral wool with a density of at least 8 lbs. per cubic foot at an unbaling station, releasing a binding holding the bale in compression, mechanically separating the fibers of a mineral wool bale with mechanical instrumentalities arranged to disperse the fibers to a generally uniform density of less than 2 lbs. per cubic foot prior to passage of the fibers through the tank inlet, and causing the separated mineral fibers to pass into the mixing tank for contact with water suspended binder.

Abstract: Inorganic fiber paper includes first biosoluble inorganic fibers having an average fiber diameter of 3 to 7 ?m, second biosoluble inorganic fibers having an average fiber diameter of 2 to 3 ?m, and a binder, the average fiber diameter of the second biosoluble inorganic fibers being smaller than that of the first biosoluble inorganic fibers.

Abstract: Processes for producing regenerated fibers from post-consumer and post-industrial waste are disclosed. The process generally involves obtaining a source of post-industrial and/or post-consumer scrap material comprising fibers, cutting the material into a desirable size in the range of from one square inch to thirty square inches, detangling the fibers, removing any finish from the fibers, if present, combing and/or picking the fibers to convert any threads into fibers, humidifying the fibers, and intimately blending the fibers. These regenerated fibers can be blended with other fibers, and intimately blended to provide a uniform blend of fibers. The fibers can then be subjected to a carding process to orient the fibers. The regenerated fibers can be used in any application that would otherwise use virgin fibers, including their use to form woven or non-woven materials.

Abstract: The formation and bulk packaging of continuous wet roving is provided. Glass fibers are attenuated from a bushing, gathered into a roving, and collected as a loose, wet mass in a container assembly. A rotating deflector assembly is used to reduce the velocity of the wet roving in-line and to direct the wet continuous roving into the container. The deflector is formed of a plurality of fingers extending radially from a central hub. The curved end of the fingers permits both for the capture and easy release of the roving from the deflector. A stripper assembly may be used to remove the wet continuous roving from the fingers. After being released from the fingers, the wet roving is permitted to fall into the container assembly under the force of gravity. The wet bulk continuous roving can be utilized in various processes that form long fiber thermoplastics and reinforced composite articles.

Abstract: A method for producing a porous body comprising apatite/collagen composite fibers comprising the steps of gelling a dispersion comprising long apatite/collagen composite fibers having an average length of 10-75 mm, short apatite/collagen composite fibers having an average length of 0.05-1 mm, and a liquid; freezing and drying the resultant gel to form a porous body; and cross-linking collagen in the porous body.

Abstract: A non-woven web such as a facer comprises recycled cellulose fiber; recycled glass fiber, and, a sizing agent which provides the mat with decreased liquid penetrability over time. An example suitable sizing agent is alkenyl succinic anhydride (ASA) which has a dry basis add-on rate of from about 0.15% to about 0.4%, and preferably a dry basis add-on rate of from about 0.2% to about 0.3%. The sizing agent provides the mat with decreased liquid penetrability four weeks after mat production. In one aspect of the invention, the mats/facers can be employed as a facer for a rigid cellular foam board.

Abstract: A process for dissolving a binder off a fiber web bonded therewith includes treating the fiber web, which is bonded with a polymeric binder having carboxylate groups crosslinked via alkaline earth metal cations, with an aqueous solution of an alkali metal salt to form a sparingly soluble salt or complex between the anion of the alkali metal salt and the alkaline earth metal cations, and then removing the fiber freed of the binder.

Abstract: The invention relates to novel borated asbestos fibers which possess improved filtration properties.

Abstract: A fibrous composite material comprising carbon fibres and chemically delaminated vermiculite lamellae and production of the material by applying a suspension (preferably an aqueous suspension) of the lamellae to carbon fibres and removing the liquid medium from the suspension. The composite material is useful for the insulation and fire-protection of substrates.

Abstract: A process of recovering asbestos fibre from asbestos-bearing material comprising a first stage of preparing a fibre concentrate by the steps of comminution, classification and spiral concentration and a second stage of liberating and recovering fibre, wherein in the second stage there is a separation by means of a hydrocyclone into a well-opened fraction and a poorly opened fraction, and wherein the asbestos-bearing material is substantially moist throughout the process.

Abstract: An improved inorganic fiber mat containing mineral wool, preferably a composite mat of mineral wool and fiberglass, is prepared by:(a) forming an aqueous slurry of the inorganic fiber raw material containing non-fibrous, particulate contaminants;(b) agitating the slurry to separate heavier contaminant materials;(c) passing the slurry through a unique cleaning apparatus whereby the moving slurry is cascaded and subjected to air induced hydraulic turbulence to separate any remaining contaminant materials; and(d) thereafter transferring the fibrous material, preferably as an admixture of cleaned mineral wool fibers and glass fibers, to a mat forming device.

Abstract: There is disclosed an improved process for phosphating asbestos fibers by reacting phosphorus chlorides with asbestos fibers in a first reaction vessel heated to a temperature within the range of the boiling temperature of the selected phosphorus chloride at atmospheric pressure and 200.degree. C. above the boiling temperature of said phosphorus chloride, then the phosphated asbestos fibers are cured in a second chamber and purged of any volatile by-product formed during the phosphating step. The products obtained possess reduced haemolytic activity.

Abstract: There is provided an improved non-woven fibrous felt material made up of fibers, partially fibrous agglomerates of forsterite, enstatite and silica as filler and an organic binder. The improved felt material possesses increased hot tensile strength over felt material made from non-calcined asbestos tailings or inert inorganic fillers.

Abstract: The abrasion resistance and tensile strength of asbestos is significantly improved by the addition of significant amounts of metal oxides, such as iron oxide, under conditions to provide at least some surface bonding of the oxides to the surface of the asbestos. The oxides are preferably added during formation of bodies from asbestos dispersions and also impart color to the final product.

Abstract: There is disclosed chemically modified chrysotile asbestos fibers, more particularly phosphated asbestos fibers containing from 0.5 to 5% by weight of phosphate groups and heat treated phosphated asbestos fibers, both of which have an infrared spectrum which exhibits substantially no absorption within the range of 954-1080 cm.sup.-1. The novel phosphated asbestos fibers are characterized by reduced haemolytic and cytotoxic activities.

Abstract: A flexible mat of randomly-oriented, interwoven chyrsotile asbestos fibers, having the appearance of a flake when flattened and spread out to "open" the fibers without separating the individual fibers and without significantly reducing their natural length, have been found to provide a reinforcing agent of extraordinary strength.

Abstract: Asbestos fibres having excellent properties in resin reinforcement are produced by controlled heat treatment of a coarse fraction of chrysotile asbestos fibres.

Abstract: A process of separating fibres from asbestos-bearing material which process comprises the steps by treating said asbestos-bearing material with a chemical agent capable of reacting with, or adsorbing on, asbestos fibres to form a dispersion, and agglomerating said dispersion, and wherein effluents containing said chemical agent are subjected to ultrafiltration prior to re-use in the process. The process given high yields of novel fibres characterized in that the said fibres provide reinforcement in cementitious compositions.

Abstract: A method of treating asbestos comprising depositing on at least a portion of the asbestos a material consisting essentially of at least one metal ferrocyanide.

Abstract: A process of separating fibres from asbestos-bearing material which process comprises the steps by treating said asbestos-bearing material with a chemical agent capable of reacting with, or adsorbing on, asbestos fibres to form a dispersion, and agglomerating said dispersion. The process gives high yields of novel fibres characterized in that the said fibres provide reinforcement in cementitious compositions.

Abstract: Asbestos fibre is dispersed in an aqueous medium essentially comprised of water, soap and from 25 to a 100 percent molar excess of fatty acid, said excess being calculated on the amount of fatty acid combined in the soap, to form a colloidal dispersion.

Abstract: Asbestos fibres having excellent properties in resin reinforcement are produced by controlled heat treatment of a coarse fraction of chrysotile asbestos fibres.

Abstract: The filtration rate of asbestos-cement slurries formed from chrysotile asbestos fibres is improved by controlled heat treatment of the fibres at a temperature of about 400.degree. to about 600.degree. C. without loss of water of crystallization and fibre strength. The improved filtration rate allows an increased rate of production of asbestos-cement products.

Abstract: Treatment of asbestos fiber with a first coating of from about 0.1 to 5 weight percent of a phosphate, or acid thereof, and subsequent addition of a nonfoaming anionic dispersant on the coated fiber produces an asbestos fiber product that possesses improved filtration properties. This treated asbestos improves the production rate of articles from cement slurries or pastes containing asbestos.