Abstract: There is disclosed a far infra-red radiant composite fiber composed of a core polymer containing 10 to 70 percent by weight of a far infra-red radiant grained material covered with a sheath polymer containing 1 to 10 percent by weight of a far infra-red radiant grained material. The above far infra-red radiant grained material in core polymer and the above far infra-red radiant grained material in sheath polymer have a far infra-red emissivity of 65% or over on an average in the spectral range from 4.5 .mu.m to 30 .mu.m at 30.degree. C. Such fiber can be woven or knitted into fabrics to wear or otherwise used to exert a warming effect on human body and thereby facilitate blood circulation, resulting in favorable effects in medical care and therapy as well as in health enhancement. Because of the sheathed fiber construction with a sheath polymer containing a low content of grained material, the fiber can be produced and treated as smooth as the ordinary sheathed composite fiber.

Abstract: A composite organic filament comprises an organic resin matrix and extrafine inorganic fiber-like segments having a diameter of 1 .mu.m or less and uniformly distributed throughout the organic resin filament matrix. The composite filament has a diameter of 3 to 500 .mu.m, and the fiber-like segments comprise carbon fibers produced by a vapor phase growth process and potassium titanate whiskers.

Abstract: Damage tolerant composites comprising high strength filaments in the form of bundles or tows of continuous fiber and a tough phase separated, crosslinked epoxy resin matrix are disclosed. The crosslinked epoxy resin matrix comprises infusible particles made from a rubber polymer that reside primarily between plies of the composite and critically have a median particle size between 10-75 microns. Prepregs for making the damage tolerant composites and methods of making such prepregs and the epoxy resin compositions thereof are also disclosed The epoxy resin compositions comprise the infusible particles which become segregated as to size on a surface layer of the prepreg during the process of combining the high strength filaments of the prepreg and the resin containing the epoxy resin composition.

Abstract: A fire retarding and fire shielding structural panel for a vehicle, comprising at least one compressed composite composed of a thermoplastic or thermosetting resin matrix containing a multiplicity of non-flammable carbonaceous fibers.

Abstract: A process wherein freshly-spun, undrawn, nonconductive filaments are combined with one or more spin-oriented, conductive filaments having a nonconductive component made from a major portion of nonconductive, fiber-forming polymeric material and a minor amount of polystyrene, the combined fibers being drawn and co-bulked to produce an anti-static yarn. The conductive filaments used in this process have higher elongations to break, and carpets tufted from the yarns of the process show improved anti-static properties.

Abstract: Disclosed is a novel ink reservoir containing a polyester fiber, such as a poly(ethylene terephthalate) fiber, having at least one continuous groove. The surface of the groove of the fiber is preferably rougher than the surface outside the groove. The ink reservoirs are useful for use with aqueous inks and have improved ink transport properties.

Abstract: Colored, high strength, high modulus p-aramid fibers are prepared by including an organic pigment which is soluble in but not degraded by concentrated sulfuric acid in a p-aramid spinning dope wherein the solvent is concentrated sulfuric acid and spinning the pigment containing dope through an air gap into a coagulation bath and washing and drying the resulting fibers. The dissolved pigment is precipitated by the coagulation bath as particles with a diameter of less than 0.50 microns.

Abstract: Disclosed is a shaped article comprising a continuous oriented polymer matrix having dispersed therein microbeads of a polymer which are at least partially boredered by void space, the microbeads being present in an amount of about 5-50% by weight based on the weight of said oriented polymer, said void space occupying about 2-60% by volume of said shaped article. Preferably, the microbeads are cross-linked to an extent they will be resilient and elastic at the orientation temperature, and are coated with a slip agent. The shaped article is preferably in the form of a sheet, fibers, or other molded article, preferably has a relatively low specific gravity and whiteness.

Abstract: A stick of small diameter being highly stiff, difficult to break or crack and usable as a cotton swab, straw, "sunokos", etc. is provided, which stick comprises a polypropylene resin as the raw material resin thereof having a crystallinity of 0.945 or more and a melt flow rate of 0.2 to 20 g/10 minutes and satisfying a relation between melt flow rate and Q value of y.gtoreq.2x+8 wherein y represents Q value and x represents melt flow rate and which stick is obtained by molding said polypropylene resin into a stick and stretching this stick to 5 times or more the original length thereof.

Abstract: An optical waveguide having a core-sheath structure whose core comprises a terpolymer based on vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene, is suitable for transmission paths of ca. 10 to ca. 100 m and can also be used at a temperature of above 100.degree. C. without significant reduction of the transmission path.

Abstract: An electrical overstress composite of conductor/semiconductor particles including particles in the 100 micron range, micron range, and submicron range, distributed in a densely packed homogeneous manner, a minimum proportion of 100 angstrom range insulative particles separating the conductor/semiconductor particles, and a minimum proportion of insulative binder matrix sufficient to combine said particles into a stable coherent body.

Abstract: The improvement in a porous hollow fiber having a large number of micropores in its surrounding wall, in which walls of said pores are coated with an essentially water-insoluble alkylcellulose derivative such as ethylcellulose, carboxymethylethylcellulose, hydroxypropylmethylcellulose acetate succinate or hydroxypropylmethylcellulose phthalate, or poly(2-hydroxyethyl methacrylate).

Abstract: This invention relates to synthetic fiber thermal insulator material in the form of a cohesive fiber structure, which structure comprises an assemblage of:(a) from 70 to 95 weight percent of synthetic polymeric microfibers having a diameter of from 3 to 12 microns; and(b) from 5 to 30 weight percent of synthetic polymeric macrofibers having a diameter of 12 to 50 microns,characterized in that at least some of the fibers are bonded at their contact points, the bonding being such that the density of the resultant structure is within the range 3 to 16 kg/m.sup.3, the thermal insulating properties of the bonded assemblage being equal to or not substantially less than the thermal insulating properties of a comparable unbonded assemblage. The invention also relates to the method of preparing said material.

Abstract: A core-clad plastic optical fiber is described, comprising a polyglutarimide series polymer having a polymeric structural unit represented by formula (I) ##STR1## wherein R represents a hydrogen atom, an alkyl group, a cycloalkyl group, or an aromatic group and n represents a positive integer,having a thermal deformation temperture of at least 120.degree. C. as a core, and an organic polymer having a refractive index lower than the refractive index of the core as a clad layer, said plastic optical fiber having the characteristic that the light transmission loss measured at 655 nm is not more than 500 dB/km.

Abstract: High strength, flexible compositions with improved mechanical properties at elevated temperatures for wire insulation coatings and other shaped articles used in hostile environments are disclosed, consisting of a high temperature fluorocarbon polymer, such as an ethylene-tetrafluoroethylene copolymer or the like, and from abot 1% wt. to about 50% wt. of a polyvinylidene fluoride compound.

Abstract: A battery separator fabric comprising a nonwoven fibrous web of thermoplastic fibers having top and bottom surface fibers and inner fibers. The surfaces of the top and bottom surface fibers of the fibrous web are seared and fused together to form film-like surfaces having pores, while the surface fibers and inner fibers of the web remain substantially unaffected. Searing and fusing of the surface fibers are accomplished by simultaneously applying heat to the top and bottom surfaces of the fibrous web so as to sear the surfaces of the thermoplastic fibers, and pressure to insure that the seared fibers make contact with each other to secure themselves together. As the seared fibers make contact with each other, film-like surfaces are formed with pores being created in the surfaces. The pores are created because a majority of spaces remain between the surface fibers.

Abstract: A conjugated fiber having a sheath-core conjugated structure comprising a polyester core component composed mainly of polyethylene terephthalate and a polyamide sheath component composed mainly of polyhexamethylene adipamide, is disclosed, which has excellent mechanical properties such as a high tenacity, a high modulus, and an improved dimensional stability, and an improved adhesion to a rubber, especially a high-temperature adhesion, an improved heat resistance in a rubber, and a high fatigue resistance, and thus is useful as an industrial material. By adopting a high-speed spinning procedure in the fiber preparing process, the peel resistance in the interface of the sheath-core conjugated structure is greatly improved, and the following valuable characteristics not possessed by conventional conjugated yarns can be obtained:(1) Excellent adhesion and high-temperature adhesion comparable to those of a polyamide, which cannot be obtained in a polyester.

Abstract: Oriented polymeric monofilaments having a diameter of at least about 60 mils and excellent uniformity in roundness, and a process for their preparation by extrusion of the monofilament in at least two stages, orienting, and coating with a layer of unoriented polymer.

Abstract: A high strength, ultra high modulus carbon fiber is characterized by the presence of the (112) cross-lattice line and the resolution of the diffraction band into two distinct lines (100) and (101), which indicate the three-dimensional order of the crystallite of the fiber. It has an interlayer spacing (d.sub.002) of 3.371 to 3.40 .ANG.; a stack height (Lc.sub.002) of 150 to 500 .ANG.; and a layer size (La.sub.110) of 150 to 800 .ANG..

Abstract: A polyamide filament having improved properties such as increased tenacity and dyeability. The filament has a birefringence of at least 0.040 and an .alpha.-crystal content of at least 30%. The filament is prepared by contacting the filament with water after the filament has been cooled to a temperature below its stick point but above its glass transition temperature. The water can be applied intermittently to the filament to produce a resulting filament having variable dyeing characteristics.