Abstract: Musical instrument string or sports racket string, comprising a core which comprises or is composed of a bundle of thermoplastic fibers, wherein at least some thermoplastic fibers of the bundle are at least partially, such as for example in a punctiform or linear manner, connected to one another in a materially integral manner, in particular by fusing on the boundary surfaces, and method for producing said string.

Abstract: The invention relates to glass strands especially for the production of composites having an organic and/or inorganic matrix, the composition of which strands comprises the following constituents in the limits defined below, expressed as percentages by weight: SiO2 50-65% Al2O3 12-23% SiO2 + Al2O3 ??>79% CaO ?1-10% MgO ?6-12% Li2O ?1-3%, preferably 1-2% BaO + SrO ?0-3% B2O3 ?0-3% TiO2 ?0-3% Na2O + K2O ??<2% F2 ?0-1% Fe2O3 ??<1%. These strands are made of a glass offering an excellent compromise between its mechanical properties, represented by the specific Young's modulus, and its melting and fiberizing conditions.

Abstract: A process for forming a carpet, and the carpet formed thereby are provided. The process includes forming a thread comprising low melt fiber and high melt fiber. The thread is then heated above a temperature sufficient to melt the low melt fiber. The thread is tufted in a carpet backing to form a tufted carpet. The tufted carpet is then printed or dyed with an image. A process for forming a low melt content yarn and the yarn formed thereby are provided. It is preferred that the carpet and low melt content yarn be adapted to printing or dyeing.

Abstract: The present invention provides a synthetic fiber blend and methods for its use comprising a first fiber component formed of a homopolymer polypropylene fiber and a second fiber component being a copolymer formed of a polypropylene and a high density polyethylene. The first fiber component is fibrillated and the second fiber component is a twisted bundle comprised of multiple strands of a nonfibrillating monofilament. The synthetic fiber blend imparts improved reinforcement properties to the building materials to which they are added. In particular, the synthetic fiber blend when incorporated into a building material provides reduced permeability, increased fatigue strength, improved toughness, and reduced plastic shrinkage. The unique combination of the twisted second fiber component blended with the first fiber component provides improved mixability and uniform distribution of the synthetic fiber blend in cementitious materials.

Abstract: A steel cord according to the invention comprises a metal core strand (11) and adjacent layer of steel elements (13). Between metal core strand (11) and adjacent layer of steel elements (13), a polymer layer (16) with a minimum thickness of more than 0.02 mm is provided. These steel cords are to be used to reinforce off-the-road tires or conveyor belts.

Abstract: A racquet string comprises of a core surrounded by at least one sheath, having a plurality of sheath fibers wound around said core, and a coating resin uniting the core and sheath fibers into a unitary body. The sheath fibers are helically wound about the core at a high wind angle, i.e., at a wind angle between 25 and 40 degrees relative to the core axis. Preferably, the sheath comprises a plurality of main sheath fibers and a plurality of non-main sheath fibers, and the core, the main sheath fibers, and the coating resin are transparent. Preferably, the non-main sheath fibers have a relatively low transparency. In this manner, the non-main fibers produce a multi-helix appearance when the string is observed from the side.

Abstract: A plurality of perforations 6 has been defined on a plastic tape 5 to be laminated on insulated wire cores 2. Accordingly, intrusions of the plastic tape 5 in between each of pair-twisted sections 4 are elevated in laminating step of the plastic tape 5. As a result, collapses in the pair-twisted sections 4 decrease, and in addition, portions of a tape material corresponding to perforations 6 defined on the plastic tape 5 are replaced by air, so that dielectric constant between conductors of the insulated wire cores 2 decreases, whereby decrease in impedance can be reduced. Thus, a twisted flat cable I exhibiting flexibility and accompanying with no decrease in impedance in laminating step is provided.

Abstract: A yarn for a floor textile material which is comprised of a coarse yarn and a fine yarn twisted together for tufting into a backing material to provide a floor mat. The finer yarn has fibers in the range of 32 to 100 decitex while the coarser yarn has fibers in the range of 110-290 decitex.

Abstract: An alternate twist plied yarn formed from a plurality of strands of singles yarn twisted in alternating directions in lengthwise intervals of first half-cycles of twist at a predetermined twist level followed by second half-cycles of twist at the same twist level with reversal nodes therebetween, the singles twisted yarns being ply-twisted together in alternating directions in lengthwise intervals of first half-cycles of ply-twist followed by second half-cycles of ply-twist, there being a bond formed adjacent each node wherein the first half-cycle of ply-twist is located within the bond and the second half-cycle of ply-twist originates at one end of the bond, the twist level in the singles twisted yarn is between 25% in the same direction and 60% in the opposite direction of the twist applied to the singles yarns before plying.

Abstract: A steel cord for the reinforcement of rubber articles is formed by twisting plural filament wires of a high carbon steel. In this case, the filament wire is drawn from a wire rod so as to satisfy a relationship of T.gtoreq.230-148 logD (wherein D is a diameter of the filament wire and T is a tensile strength of the filament wire) and a difference in tensile strength between a surface layer portion and an internal portion in the filament wire of not more than 80 kgf/mm.sup.2.

Abstract: A composite rubber body is formed by embedding steel cords in rubber and vulcanization-building them. In this case, each of the steel cords is a single steel filament wire or plural twisted steel filament wires obtained by drawing of a wire rod of high carbon steel having a given composition. The filament wires satisfy given relationships between filament diameter and tensile strength before and after the vulcanization and have a retention of loop strength of not less than 55%.

Abstract: This invention relates to linear, water-dispersible sulfopolyesters that incorporate higher order polyalkylene glycol units. The sulfopolyesters provide improved abrasion and blocking resistances in polyester fiber sizing applications.

Abstract: An alternate twist plied yarn formed from a plurality of strands of singles yarn twisted in alternating directions in lengthwise intervals of first half-cycles of twist at a predetermined twist level followed by second half-cycles of twist at the same twist level with reversal nodes therebetween, the singles twisted yarns being ply-twisted together in alternating directions in lengthwise intervals of first half-cycles of ply-twist followed by second half-cycles of ply-twist, there being a bond formed adjacent each node wherein the first half-cycle of ply-twist is located within the bond and the second half-cycle of ply-twist originates at one end of the bond, the twist level in the singles twisted yarn is between 25% in the same direction and 60% in the opposite direction of the twist applied to the singles yarns before plying.

Abstract: A steel cord for reinforcing automobile tires is composed by intertwisting at least one material wire having small spiral-like curls and 1 to 5 straight material wires. This restricts the ratio of fracture elongation of the two kinds of material wires as well as the elongation percent of the cord at 5 kg loading and improves the stability of twist, the fatigue resistance, the penetrability of a rubber compound and the handling workability.

Abstract: A pneumatic radial tire including at least one ply of carcass layer comprising a number of cords disposed at right angle with respect to a circumferential direction of the tire and anchored at a pair of beads, said cords of the carcass layer being treated with adhesive treating agents, i.e. an epoxy treating agent and a RFL treating agent, at the stage of both yarns and cords, said cords being formed by twisting at least two treated strands which are formed by twisting yarns treated with both the epoxy treating agent and the RFL treating agent and said cords being further treated with at least the RFL treating agent.

Abstract: A yarn produced from two or more twisted cellulosic fibers, such as cotton or cotton rayon fibers, the plies being helically wound around a thermoplastic filament core which is subsequently melted to bind the inner portions of the yarn together so that it does not untwist or shed lint readily. The yarn is employed in a dust mop or floor mat for a shampoo bonnett for stain resistant treated carpet.

Abstract: Rubber-reinforcing polyamide fiber cords are disclosed which are each obtained by primarily twisting an aromatic polyamide filament yarn, doubling a plurality of thus primarily twisted yarns and finally twisting doubled yarns in a twisting direction opposite to that of the primary twist yarn to obtain a plied yarn, and applying a rubber adhesive to the thus obtained plied yarn. N and M satisfy the following relation: 1.05.ltoreq.M/N.ltoreq.1.6 in which N and M are the number of primary twists and the number of the twists in the cord, respectively.

Abstract: Aqueous overfinish compositions, yarns treated therewith, and methods of producing wet abrasion resistant cordage from the yarn are all disclosed. One of the compositions includes an oxidized polyethylene emulsified with a non-nitrogen, nonionic emulsifier and neutralized with an alkali hydroxide, and a compound selected from the group consisting of a siloxane of the comonomers dimethyl and 3-[(2-aminoethyl)aminopropyl], and an amide melamine wax. An alternate finish composition comprises an oxidized polyethylene, neutralized with ammonium hydroxide and emulsified with a non-nitrogen, nonionic emulsifier. Yarn treated with this alternate finish has enhanced wet abrasion resistance. Yarns of this invention are ideally suited for heavy ropes and other industrial cordage applications where wet and dry abrasion resistance and strength are desirable.

Abstract: A composite structure comprises at least one ply comprising approximately parallel unidirected twines comprising helically-configured matrix-impregnated continuous strands of filament reinforcements to provide a flanged composite cantilever spring which serves as the principal constituent of a coupling structure. An interior ply of a coupling structure body member comprises unidirected longitudinal twines configured at a body member extremity to provide a flange member connected to a cantilever spring. An exterior ply is disposed transversely of and superimposed upon the interior ply to provide the cantilever spring hinge line. The composite cantilever spring can be constructed to deflect about either a straight or curved hinge line. A preferred tubular form of the coupling structure comprises at least one end configured as a polygonal array of flanged cantilever springs which serve as the socket end of a spring-lock coupling used to connect mating flanged spigot-end structures.

Abstract: A process for the improvement of the adhesion to rubber or a thermoplastic elastomer of synthetic yarns, cords or fabrics made therefrom by applying thereto an adhesive consisting of an aqueous solution or dispersion of a polyurethane with ionic groups, capped isocyanate groups and groups with a Zerewitinoff-active H atom, followed by drying the product thus treated. The polyurethane corresponds to the structure: ##STR1## wherein X has the meaning of an O or S atom or of an O-, S-, N- or P-containing group with a Zerewitinoff-active H atom or to which prior to reaction with an isocyanate group a Zerewitinoff-active H atom had been attached,R.sub.1 represents the remainder of a capping agent,R.sub.2 represents an at least divalent organic group which remains after removal of isocyanate groups from a polyisocyanate,R.sub.3 represents an at least divalent organic group which remains after removal of --XH groups from an organic compound having a molecular weight of 62 to 2000,R.sub.

Abstract: A composite structure comprises at least one ply comprising approximately parallel unidirected twines comprising helically-configured matrix-impregnated continuous strands of filament reinforcements to provide a flanged composite cantilever spring which serves as the principal constituent of a coupling structure. An interior ply of a coupling structure body member comprises unidirected longitudinal twines configured at a body member extremity to provide a flange member connected to a cantilever spring. An exterior ply is disposed transversely of and superimposed upon the interior ply to provide the cantilever spring hinge line. The composite cantilever spring can be constructed to deflect about either a straight or curved hinge line. A preferred tubular form of the coupling structure comprises at least one end configured as a polygonal array of flanged cantilever springs which serve as the socket end of a spring-lock coupling used to connect mating flanged spigot-end structures.

Abstract: A multifilament yarn of an aromatic polyamide, in particular poly-p-phenylene terephthalamide, is provided with an adhesive coating of a cured epoxy compound, the yarn having a free epoxide content not higher than 10 mmoles/kg. The yarn is made by spinning a solution of an aromatic polyamide into a coagulation bath and subjecting the resulting filaments to the subsequent steps of washing, applying a curable epoxy compound and one or more alkaline curing agents, curing and winding the yarn thus treated into a package. The resulting yarn can be processed into a reinforcing element for, e.g., tires in a one-step dipping process. A cord made from the yarn displays an improved resorcinol-formaldehyde-latex dip pickup.

Abstract: A certain process and exemplary machinery for making yarn which is particularly useful for producing mops and mats utilizes yarn generally of a mixture of cotton and certain synthetic fibers and subjects the yarn to heat and pressure. The heat melts the surface of the synthetic fibers and pressure urges the cotton fibers into engagement with the synthetic fibers. Upon cooling, the cotton fibers are mechanically bonded to the synthetic fibers and provide a mop yarn which is fluid absorbant, durable and resistant to scrubbing abrasion and maintains integrity for repeated use and washings.

Abstract: A natural gut string for sports rackets comprises at least two gut strands, each strand of which comprises a plurality of gut ribbons twisted together in a first direction, which strands are combined and re-twisted together in a direction opposite to the first direction. In a process for making the gut strings, the gut ribbons and gut strands are preferably twisted under tension.

Abstract: A string for sports rackets consists of a gut core covered with filamentary aramid and impregnated with at least one coating of water-resistant, vapor-impermeable, flexible smooth adhesive polymeric resin, which adheres the filamentary aramid to the gut core.

Abstract: The invention particularly relates to a reinforcing cord for elastomeric objects, which cord is built up of two or more groups of endless filament bundles which are twisted or laid together. Each group contains at least one bundle of PPDT filaments and at least one bundle of rayon filaments. The cord is especially meant for use in pneumatic tires of vehicles. When use is made of the cord composite according to the invention, radial ply tires for trucks need be provided with only two carcass plies and heavy-duty tires of passenger cars need comprise only one carcass ply.

Abstract: A process for the production of reinforced rubber articles formed from polyester yarn embedded into rubber stock is disclosed. The process comprises the steps of: (1) treating the yarn with a finish composition which comprises water and a silane having the structural formula: ##STR1## wherein n=2 to 5, and (2) including from about 2 to 50 parts, per hundred parts of rubber, of silica particles in the rubber stock. The reinforced rubber article is preferably a pneumatic passenger tire which has excellent adhesion of tire cord to rubber.

Abstract: A fibre, a thread bundle and a cord entirely or substantially consisting of poly-p-phenylene terephthalamide having an inherent viscosity of at least 2.5. The fibre has a tenacity of at least 10 cN/dtex, an elongation at break of at least 2.7% and an initial modulus of at least 300 cN/dtex, said fibre having an improved resistance to the action of heat as shown by a heat sensitivity index not higher than 12. Dipped cords formed from said fibre have a cord efficiency of at least 75%.

Abstract: A method is provided which comprises preparing a drawn, coated polyester yarn by applying an aqueous emulsion of an epoxy resin and spin finish fiber treatment oil to spun or drawn yarn, said oil is comprised of a mixture of pentaerythritol tetraester (C.sub.12 -C.sub.14) fatty acid, polyoxy ethylene nonyl phenol and oleyl diethyl imidazoleimium sulfate.

Abstract: A flexible load-carrying cord which is adapted for embedment in a polymeric product, apparatus and method for making such a cord, and product utilizing same are provided wherein the cord comprises a plurality of elements which are twisted in one direction and normally have a tendency to untwist and a polymeric sleeve is bonded around the cord with the sleeve comprising a polymeric matrix having a plurality of discrete randomly arranged fibers embedded therein with the fibers being disposed in a helical pattern which extends in a direction opposite from the one direction and the sleeve with its fibers serving to substantially eliminate the tendency of the elements to untwist.

Abstract: A gut having a novel structure made of a thermoplastic resin and a method of producing the same.