Abstract: A reinforced plastic which comprises a continuous long fiber reinforcing material in an arylene sulfide sulfone copolymer matrix consisting essentially of two structurally different arylene sulfide sulfone units within the polymer backbone.

Abstract: Panels are disclosed which are suitable for joiner, non-structural bulkheads.The panels are a laminate having a central portion of gypsum or a magnesium oxy-chloride cement which may or may not be glass fiber reinforced and externally exposed fire-resistant skins directly bonded to opposite sides of the central or core material. These skins are formed of a solid phenol-formaldehyde glass resin composite such as for example a prepreg formed from a woven glass roving of a high strength, high melting point glass and a cured phenol-aldehyde resin.

Abstract: A number of rods are disposed along at least three differently oriented axes, the rods being formed by bonding together bundles of fibers with a matrix. Each rod in one group is passed between rods of the other differently oriented groups. The cross-sectional shape of a rod extending in at least one direction is matched to the shape of a clearance which is left between rods extending in other directions to admit the rod inserted therethrough. Put otherwise, a rod extending in at least one direction has a projection to fill such a clearance. Great enough strength to withstand external forces exerted from any direction is imparted to the three-dimensional fabric composite materials either by increasing the area of contact between individual rods or by minimizing the clearances between rods by means of a matrix of the like.

Abstract: A filament-reinforced resinous structural rod having a rugged periphery thereof comprises a reinforcing fibrous member impregnated with a polymeric resinous material and comprising a core element composed of a plurality of filament bundles bundled together, a binding element comprising a filament bundle spirally wound around the core element, a plurality of filament bundles arranged in parallel to each other on and along the core element, and a filament bundle spirally wound around the assembly of the core element bound with the wound filament bundle and the plurality of filament bundles in parallel to the filament bundle wound around the core element.

Abstract: Staple yarns of cotton and high modulus fiber are wet and then dried under tension to provide warp yarn for durable, abrasion resistant fabrics.

Abstract: Fibers are disclosed which consist of a combination of para-aramid and poly(vinyl pyrrolidone). The fibers exhibit improved strength and greatly improved dyeability as well as improvements in several other characteristics.

Abstract: The invention concerns a novel mesh structure with high resistance in particular to piercing and tearing.The object of the invention is a novel mesh structure with high resistance in particular to piercing and to tearing, characterized in that it comprises a knit structure, the texture of which is formed of an entirety of forward meshes comprising a quilting stitch, two cylindrical reverses and a flat weft, repeated every eight drops, with the threads constituting the knit being formed of polyaramide fibers.The invention is useful in the fashioning of clothing, linings or walls for protective and/or safety purposes.

Abstract: A fishing rod, golf club shaft or the like is produced by a laminated tube, which is formed by winding a prepreg formed of a fiber reinforced sheet around an outer periphery of the mandrel which has cylindrical configuration and is removed after the formation of the laminated tube body. A first winding material wound around either one of the inner, intermediate, and outer portions of the laminated tube body in spiral or twill form with suitable pitches and a second winding material having a good adhesive property with respect to the thermosetting or thermoplastic resin is wound around an outer periphery of the first winding material, the second winding material being composed of yarns or mono-filament of organic or inorganic fiber having a good adhesive property with respect to said resin. The first winding material is wound around the laminated tube body while winding the second winding material around the first winding material.

Abstract: A fiber-reinforced polymeric resin composite material useful for producing a shaped composite article having a high thermal stability and mechanical strength, and a low creep strain, comprises a thermoplastic polymeric resin matrix and a number of reinforcing individual fibers embedded within the polymeric resin matrix in such a manner that 10% to 70% by the number of the individual fibers are separated from each other through portions of the polymeric resin matrix and the remaining individual fibers form at least one fiber bundle.

Abstract: A propelling cage discarding sabot for a spin-stabilized subcaliber projectile, including a plastic material which is shaped and which is composed of a polyamide and from about 5% to about 30% by weight of carbon fiber, the plastic material having a specific weight which does not exceed 1.11 g/cm.sup.3, a tensile strength which is greater than 120 N/mm.sup.2, and a maximum water absorption which does not exceed 0.8% so that the propelling cage discarding sabot has mechanical characteristics which are substantially constant and has substantial dimensional trueness.

Abstract: Non-woven mat consisting of one or more overlapped layers, each made of continuous, parallel, monodirectional filaments of an acrylic polymer having a tenacity of at least 50 cN/tex, an elastic modulus equal to at least 1000 cN/tex, and an ultimate elongation lower than 15%.Use of this non-woven mat as reinforcement for organic and inorganic matrices, and manufactured articles thus obtained.

Abstract: A rocket motor or other gas generator the case of which is ventable at a predetermined temperature substantially greater than the ambient temperature range for storage and operation thereof and substantially less than the auto-ignition temperature of gas generant material contained therein so as to prevent catastrophic propulsion or burst in case of fire. The venting is provided by memory metal members which are interleaved between plies of matrix-impregnated fibrous material in the case and which have a transformation temperature which is substantially higher than the ambient temperature range and substantially lower than the auto-ignition temperature and characterized by a change in shape when heated to a temperature above the transformation temperature.

Abstract: A protective ballistic panel includes a first-impact, front layer and a spaced rear layer each of which is made of a relatively tough, nonmetallic material. The front and rear layers are connected to one another at their respective peripheries by an intermediate peripheral strip made of an at least semi-elastic material such as formed polyurethane or rubber. The peripheral strip together with the front and rear layers define an enclosed hermetically sealed air space betweeen said front and rear layers. The front and rear layers are each of laminated construction and comprise plural plies of composite material such as Kevlar, glass fibers, ballistic nylon and graphite fibers. The protective capacity of the first-impact front layer can be increased by providing a plurality of Kevlar plies therein together with at least one intercalated ply of Mylar film, all of the plies of the front layer being connected together by a laminating compound or by rivets.

Abstract: The present invention provides fiber-reinforced ceramics containing at least one member of fibers and whiskers as distributed in a sintering ceramic matrix, which comprises the ceramic matrix being composed mainly of SiC, Si.sub.3 N.sub.4 and Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, where 0<z.ltoreq.4, the fibers and the whiskers being composed of at least one of SiC, Si.sub.3 N.sub.4 and Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, where 0<z.ltoreq.4, and a coating film of C, B or BN being provided on the surfaces of the fibers and the whiskers. The fiber-reinforced ceramics have a high fracture toughness, K.sub.1c, and a high bending strength, particularly K.sub.1c of at least 10 MN/m.sup.3/2 and a bending strength of at least 50 kg/mm.sup.2.

Abstract: The invention relates to prepregs of fiber-reinforced thermosetting resin that have a coating comprising thermoplastic particles on one or both outer surfaces. Upon lamination of the prepregs into a composite, the layer comprising thermoplastic particles at the surface of the prepreg is formed into a discrete resin layer in the composite at the interface between fiber-reinforced thermosetting resin layers. The laminated composite materials have improved toughness and impact strength due to the thermoplastic particulate material at the interface and yet the composites still retain desired mechanical properties under hot/wet conditions.

Abstract: The present invention provides fiber-reinforced ceramics containing at least one member of fibers and whiskers as distributed in a sintering ceramic matrix, which comprises the ceramic matrix being composed mainly of SiC, Si.sub.3 N.sub.4 and Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, where 0<z.ltoreq.4, the fibers and the whiskers being composed of at least one of SiC, Si.sub.3 N.sub.4 and Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, where 0<z.ltoreq.4, and a coating film of C, B or BN being provided on the surfaces of the fibers and the whiskers. The fiber-reinforced ceramics have a high fracture toughness, K.sub.lc, and a high bending strength, particularly k.sub.lc of at least 10 MN/m.sup.3/2 and a bending strength of at least 50 kg/mm.sup.2.

Abstract: The composite material according to the invention has carbon reinforcing fibres (2) coated with a carbon coating (6) and then a SiC coating (8), embedded in a carbon-based matrix, covered by an outer silicon carbide layer (10), sealed by a silicon carbide coating (14), then an aluminium or hafnium nitride coating (16) and finally an outer alumina coating (18). This stainless material can be used as a heat shield for space shuttles.

Abstract: Disclosed are flocced mineral materials which may be utilized to prepare high temperature resistant, water resistant articles. These materials are prepared by utilizing, as a starting material, a gellable layered swelled silicate that has an average charge per structural unit that ranges from about -0.4 to -1 and which contains interstitial cations which promote swelling with a source of at least one species of multiamine derived cations.

Abstract: A composite member features a unique ply geometry which contributes to improved bending strength. The composite is constructed of a plurality of plies, each comprising a fiber component disposed within a polymer matrix. An inner ply has a fiber component which has fibers which are circumferentially extending. An intermedaite ply has first axially extending fibers which are disposed about the circumference of the composite, as well as second axial fibers which are interwoven with helically oriented fibers and embedded in a polymer matrix. An outer layer is similar to the inner layer as it features circumferentially extending fibers which are embedded in a polymer matrix.The composite materials may be used to manufacture a wide range of items which require light weight combined with high strength.

Abstract: A flexible sheet which comprises a non-woven fabric made predominantly from a poly(aromatic amide) component which is impregnated with a heat- and/or light-curable resin, wherein the non-woven fabric satisfies the following conditions:5 g/m.sup.2 <weight per unit area<35 g/m.sup.2, and0.15 g/cm.sup.3 .ltoreq.density.ltoreq.0.8 g/cm.sup.3,which has well balanced properties, such as excellent heat dimensional stability, heat resistance (soldering resistance), water resistance, solvent resistance, electrical insulating properties and mechanical properties and is useful for the preparation of a flexible printed circuit board, and use thereof for a flexible metal-clad laminate and a flexible printed circuit board.

Abstract: Provided is a moldable sheet comprising a synthetic organic fiber nonwoven fabric for reinforcing resinous molded article and a resin composition having impregnated the nonwoven fabric. The nonwoven fabric comprises opened single filaments having a specific fineness and bundles of filaments laid parallel with one another having a specific total fineness distribution, said single filaments and said bundles of filaments being bonded with a binder of non-fiber form. By employing this construction, the nonwoven fabric can, when used for reinforcing resinous article, improve the impact resistance, i.e. falling ball impact resistance and Izod impact resistance, which have been poor with conventional glass-fiber reinforced resinous shaped articles, while maintaining the high mechanical strength of the resinous article.

Abstract: A reinforced plastic is provided which comprises a poly(arylene sulfide sulfone) polymer matrix and fibrous reinforcement. The fibrous reinforcement is treated with a poly(arylene sulfide sulfone) polymer containing ether groups prior to forming the reinforced plastic. Such treatment improves the mechanical strength of the reinforced plastic.

Abstract: A stretch broken fiber reinforced resin tow is formed from resin reinforced with continuous filaments by tensioning the tow while heating it to a temperature sufficient to soften the resin in the tensioning zone to break all of the filaments in a random manner.

Abstract: A woven fabric structure impregnated with a hardened resin has first and second warp fabric sections, the second section comprising a plurality of pleats integrally joined to the first section by warp threads of the second section and interwoven with the weft threads of the first section. The fabric is of an industrial yarn such as aramide fiber, carbon fiber, ceramic fiber, glass fiber or a blend of such fibers.

Abstract: A transparent composite material, which may take the form of a plate, includes a polymeric matrix and glass fibers embedded within the matrix. The polymer of the matrix and the glass of the fibers are transparent and have substantially the same index of refraction. A bond exists between the glass of the fibers and the polymer of the matrix. The composite may be formed by immersing the fibers in a monomer and then curing the monomer to a polymer.

Abstract: High strength thermoplastic resin/carbon fiber composites and methods of producing such composites are provided. The composites are comprised of carbon fibers, an amine-terminated poly(arylene sulfide) first resin component, and a second resin component selected from the group consisting of poly(arylene sulfides), polyolefins, polysulfones, polyether sulfones, polyetherimides, polyetherketones, polyethertherketones, polyetherketoneketones, liquid crystal polymers, and mixtures of such resins.

Abstract: A thermal insulator for a rocket motor body comprises a member adapted to be fitted as a sleeve on the outer surface of the body the member comprising a composite of cork having on its outer surface a layer of fibre reinforced polymeric material wherein a substantial proportion of the fibre reinforcement comprises fibres of low-conducting material.

Abstract: Toughened bismaleimide resin systems capable of preparing carbon fiber reinforced composites having compression after impact strengths of greater than 40 Ksi are prepared from bismaleimide matrix resin systems containing a member of a limited set of soluble thermoplastic polyimides in particulate form.

Abstract: A thermally stable metal coated carbonaceous fiber batting, fiber tow, yarn or fabric which maintains loft, has some degree of resiliency and some degree of stability in the presence of various concentrations of oxygen at elevated temperatures said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1.

Abstract: A composite structure of elastic and viscoelastic components in which dynamic loads are effectively damped by transmission through the viscoelastic components. The structure includes a continuous sandwich comprised either of a single elastic layer enclosed by two viscoelastic layers or of a single viscoelastic layer enclosed by two elastic layers such that the sandwich has little stiffness in any intended direction of loading, and two segmented elastic layers having stiffness in a desired loading direction. The segmented layers have alternating segments and gaps and are disposed one on each side of the viscoelastic layer in such a manner that the gaps of one segmented layer overlap the segments of the other segmented layer. Dynamic loads in the loading direction are transmitted back and forth from one segmented layer to the other, through the continuous sandwich layer containing the viscoelastic material, which thereby provides a high degree of damping.

Abstract: Fabrics are made electrically conductive by contacting the fiber under agitation conditions with an aqueous solution of an aniline compound, oxidizing agent and a doping agent or counter ion and then depositing onto the surface of individual fibers of the fabric a prepolymer of the aniline compound so as to uniformly and coherently cover the fibers with a conductive film of the polymerized aniline compound and wherein, furthermore, the oxidizing agent is a vanadyl compound whereby the reaction rate is controlled such that the prepolymer is uniformly and coherently adsorbed onto the surface of the textile material, thereby providing improved films of electrically conductive polymerized compound on the textile material.

Abstract: A thermally stable ceramic coated carbonaceous fiber batting, fiber tow, yarn or fabric which maintains loft, has some degree of resiliency and some degree of stability in the presence of various concentrations of oxygen at elevated temperatures said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1.

Abstract: A composite structure having a fibrous reinforcing body formed from fibers of a refractory material, a ceramic matrix surrounding the fibers of the reinforcing body and an intermediate layer of a refractory material having a laminar structure disposed between the fibers of the refractory material having a laminar structure disposed between the fibers of the refractory material and the ceramic matrix and adherent to both. The intermediate layer has a thickness sufficient to reduce the susceptibility of the structure to crack propagation and to increase impact strength but not exceeding 3.0 microns. The intermediate layer is also elastically deformable in shear and has an elongation at break greater than the matrix.

Abstract: A woven fabric gap filler with carbon fiber yarns providing a central gap filling group section of large diameter warp yarns assuming a triangular sectional shape with tab portions extending respectively from the respective apexes of the triangular filler section to be held between lay-up of opposing graphite epoxy fabric rib and flange sheets for integration therewith and to retain the apexes of the filler section against shrinkage when the assembly is heat treated. Under stress of the hard plastic structural unit, the forces will be passed through transverse fabric woof yarns as well as through longitudinal warp yarn strands so as to resist breakdown of hard plastic within the gap filling section of the structural unit when stressed.

Abstract: A reinforced plastic is provided which comprises a continuous long fiber reinforcing material in an ether group-containing poly(arylene sulfide sulfone) polymer matrix.

Abstract: An oxide barrier coating for reinforcing fiber is provided with a preselected microstructure and thickness through control of the concentration of metal salt in heat decomposable form as a precursor of metal oxide. In one form, the salt is a metal oxyhalide salt such as zirconium oxyhalide or halfnium oxyhalide. Fibers, such as ones of alumina, aluminasilicate or silicon carbide, having the coating of the invention are especially useful as reinforcing fibers for reinforced ceramic matrix composites.

Abstract: Disclosed is a method of preparing a superconductor wherein a precursor oxide mixture is dispersed in an appropriate polymer matrix and shaped into a predetermined form following which the matrix and oxide precursor are respectively carbonized and sintered simultaneously. An alternate method is to separately prepare a superconducting material from the precursor oxide mixture, grind the superconducting material and add it to a solution containing polyacrylonitrile, shape into a predetermined form, following which the superconducting material and matrix are, respectively, carbonized and then annealed.

Abstract: Disclosed is a woven fabric having a plurality of fabric layers which are integrated through combined portions formed by interlacing warps or wefts of one of adjacent layers of some of warps or wefts of said one layer and warps or wefts of the other layer or some of warps or wefts of said other layer with common wefts or warps, wherein a set of adjacent four layers comprises recurring structural units comprising (A) a part having one combined portion formed by intermediate two layers, (B) a first non-combined part having no combined portion, (C) a part having two combined portions formed by subsequent two layers, respectively, and (B) a second non-combined part having no combined portion. A honeycomb structure having cells of a shape of tetragons, hexagons or a combination thereof is formed among the entire layers when the multi-layer fabric is expanded. 40-100 wt. % of the fibers constituting the fabric are organic fibers which are infusible or have a melting point of at least 300.degree. C.

Abstract: Preforms and composite articles from carbon fiber reinforced matrix resins braided to shape on a mandrel and then converting to a final composite article by fully or partially curing in a mold followed by post curing if required.

Abstract: Textile structure based on filaments impregnated and/or coated with thermoplastic material (FIT filaments) is formed from at least two layers of such FIT filaments, arranged perpendicularly to one another in the manner of a warp and a weft, but without being interlaced, and a binding weave consisting of a warp and a weft holding each of the FIT filaments in position. The textile structure is particularly applicable to the production of laminates exhibiting high mechanical stength.

Abstract: Fibrous material is coated with boron nitride and a silicon-wettable material, the coated fibrous material is admixed with an infiltration-promoting material which is at least partly elemental carbon and the mixture is formed into a preform which is infiltrated with molten silicon producing a composite containing boron nitride coated fibrous material.

Abstract: A composite material comprising a para-oriented aramide fiber sheet and a thermosetting resin matrix. The composite material is characterized in that the reinforcing para-oiented aramide fiber sheet is pre-treated with a reactive siloxane oligomer prior to impregnation with the thermosetting resin. The reactive siloxane oligomer is represented by the following general formula (1) of: ##STR1## wherein Z is ##STR2## CH.sub.2 --O--, HS, NH.sub.2 -- or CH.sub.2 .dbd.CH--; m is an integer of from zero to 4; n is an integer of from 1 to 9; and R.sub.1 is the same or different groups selected from methyl, ethyl and phenyl.The composite material is improved in electric resistance properties, particularly after being dipped in boiling water, and also improved in thermal resistance to soldering.

Abstract: An intermediate for a composite material is described, comprising a reinforcing material impregnated with a resin composition which comprises: (A) 100 parts by weight of a mixture of (I) a polyfunctional maleimide and (II) a polyfunctional cyanate or an oligomer thereof, or a preliminary reaction product of (I) and (II); (B) from 5 to 100 parts by weight of an epoxy compound; and (C) from 5 to 50 parts by weight of a polyester compound.

Abstract: Composite of improved flex fatigue life comprising 50 to 70 volume percent reinforcing filaments of carbon, aramid or glass uniformly coated with a polymer in a polymeric matrix. The Young's modulus of the filament coating polymer is intermediate the Young's modulus of the filament and the matrix polymer.

Abstract: A speaker cone plate is provided with an inorganic surfacial hard layer formed at least on a face of a metal substrate and is subjected to a reinforcing treatment by hot isostatic pressing, wherein the surfacial hard layer may be composed of a carbide, an oxide, a borie or a phosphide or may be formed by plasma thermal spraying of an inorganic substance containing silicon nitride whiskers or silicon carbide whiskers.

Abstract: Novel ceramic matrix composition comprising toughened ceramic layers interlaminated with fiber-reinforced ceramic layers and offering improved off-axis and axial properties, are described. The fiber-reinforced layers comprise inorganic reinforcing fibers disposed in a ceramic matrix material, with the reinforcing fibers being oriented along axes parallel with the planes of the layers, while the toughened ceramic layers comprise inorganic whiskers or chopped fibers randomly oriented in the layers.

Abstract: A prepeg formulation comprising prepreg filament fibers unidirectionally aligned, and/or woven and nonwoven fabrics, a thermosetting matrix resin and a small amount of well dispersed inorganic whiskers in the resin, alone or in combination with extremely fine fibers of a thermoformable polymer having at least one of a T.sub.m or T.sub.g greater than about 300.degree. C. or no T.sub.m or T.sub.g and a decomposition temperature greater than about 300.degree. C. The preferred matrix resin is a blend of a thermosetting epoxy resin and an amorphous thermoplastic polymer having a T.sub.g greater than about 195.degree. C.

Abstract: A fiber grid reinforcement is of a flat shape and has first and second directions perpendicular to each other. The fiber grid reinforcement includes a plurality of first fiber bundles, a plurality of second fiber bundles, and a resin material. The first fiber bundles are generally disposed along the first direction and generally parallel to one another. Each of the first fiber bundles includes at least one first group of fibers. The second fiber bundles are generally disposed along the second direction and generally parallel to one another. Each of the second fiber bundles inbcludes at least one second group of fibers. The second fiber bundles intersect perpendicular to the first fiber bundles at intersecting sections so as to form a grid structure. The first group and the second group of fibers are layered alternately at the intersecting sections in such a manner that at least one outermost layer is the second group. The resin material bonds fibers in each group, and bonds the groups to one another.

Abstract: Oriented microfibers and processes for making them are disclosed, together with blends of such microfibers with other fibers such as crimped staple fibers and non-oriented microfibers.

Abstract: A process for fabricating a composite article is disclosed. A surface of a preconsolidated fiber reinforced glass matrix composite structure is pretreated to promote adhesion to the surface, a mass of fiber-containing uncured resin is molded in contact with the pretreated surface and the resin is cured to consolidate a fiber reinforced resin matrix composite structure and simultaneously bond the resin matrix composite structure to the glass matrix composite structure. An external flap for a gas turbine engine fabricated by the above process is also disclosed.