Abstract: Insulated electrically conductive continuous fibers or microwires of sizes on the order of 1 mil (25 microns) diameter, so as to be suitable for processing into yarns or multi-microwire bundles, for example, for incorporation into conformable fabric products or for use as wearable electronic circuitry are made by coprocessing a core of a lower-melting-point metal within a sheath of a higher-melting-point polymer.

Abstract: A consumable material for use in an extrusion-based digital manufacturing system, the consumable material comprising a length and a cross-sectional profile of at least a portion of the length that is axially asymmetric. The cross-sectional profile is configured to provide a response time with a non-cylindrical liquefier of the extrusion-based digital manufacturing system that is faster than a response time achievable with a cylindrical filament in a cylindrical liquefier for a same thermally limited, maximum volumetric flow rate.

Abstract: A composition for coating comprising at least one compound of formula (I): R<a>Si(R<1>)n(X<1>)3-n, and optionally at least one compound of formula (II): R<b>Si(R<2>)m(X<2>)3-m, wherein R<a> is a straight-chain or branched C(1-24) alkyl group, R<b> is an aromatic group, such as an optionally substituted carbocyclic and heterocyclic group comprising five-, six- or ten-membered ring systems, which is linked by a single covalent bond or a spacer unit, such as a straight-chain or branched alkyl residue having 1 to 8 carbon atoms, to the Si- atom, R<1> and R<2> are, independently of each other a lower alkyl group, such as a straight chain and branched hydrocarbon radical having 1 to 6 carbon atoms, X<1> and X<2> are independently of each other a hydrolysable group, such as a halogen or an alkoxy group and n, m are independently of each other 0 or 1, with the proviso that if n and m are independently of each other 0 or 1, X may represent the sam

Abstract: The islands-in-sea type composite fiber of the present invention comprises a sea part containing an easily soluble polymer and 100 or more island parts containing a hardly soluble polymer, per fiber. In a cross-sectional profile of the composite fiber, each of the island parts has a thickness in the range of from 10 to 1,000 nm and the intervals between the island parts adjacent to each other are 500 nm or less. The islands-in-sea type composite fiber is produced by melt spinning the sea part polymer and the island part polymer mentioned above through a spinneret for an islands-in-sea type composite fiber and taking up the spun fiber at a speed of 400 to 6,000 m/min. Dissolution and removal of the sea part polymer from the composite fiber gives a group of fine fibers having a thickness of 10 to 1,000 rim and useful for clothing, industrial materials and other applications.

Abstract: Bicomponent fibers having a sheath-core morphology where the sheath is a thermoplastic polymer and the core is an elastomeric compound are made which can be continuously extruded from the melt at high production rates. The elastomeric compound comprises a coupled, selectively hydrogenated block copolymer having high flow. The block copolymer has at least one polystyrene block of molecular weight from 5,000 to 7,000 and at least one polydiene block of molecular weight from 20,000 to 70,000 and having a high vinyl content of 60 mol % or greater. The bicomponent fibers are useful for the manufacture of articles such as woven fabrics, spun bond non-woven fabrics or filters, staple fibers, yarns and bonded, carded webs. The bicomponent fibers can be made using a process comprising coextrusion of the thermoplastic polymer and elastomeric compound to produce fibers at greater than 800 mpm and having a denier from 0.1 to 50 g/9000 m.

Abstract: A biodegradable, substantially continuous filament is provided. The filament contains a first component formed from at least one high melting polyester and a second component formed from at least one low melting polyester. The low melting point polyester is an aliphatic-aromatic copolyester formed by melt blending a polymer and an alcohol to initiate an alcoholysis reaction that results in a copolyester having one or more hydroxyalkyl or alkyl terminal groups. By selectively controlling the alcoholysis conditions (e.g., alcohol and copolymer concentrations, catalysts, temperature, etc.), a modified aliphatic-aromatic copolyester may be achieved that has a molecular weight lower than the starting aliphatic-aromatic polymer. Such lower molecular weight polymers also have the combination of a higher melt flow index and lower apparent viscosity, which is useful in the formation of substantially continuous filaments.

Abstract: A cubic boron nitride sintered material where wear resistance is suppressed from decreasing having excellent chipping resistance and a cutting tool made thereof are provided. The sintered material is constituted from cubic boron nitride particles that are bound by a binder phase, while the binder phase contains a carbide of at least one kind of metal element selected from among metals of groups 4, 5 and 6 of the periodic table and a nitride of at least one kind of metal element selected from among metals of groups 4, 5 and 6 of the periodic table coexisting therein, and therefore the particles can be suppressed from coming off and the binder phase can be suppressed from wearing and coming off at the same time, thereby making the sintered material having high wear resistance and particularly excellent chipping resistance.

Abstract: Monofilament string suited for use in tennis rackets and the like, consisting of a core material and a covering material that serves as a matrix, in which the core material is embedded in the covering material in accordance with the ‘island in the sea structure’ and that therefore contains island components and a sea component, whereby the island components largely but not exclusively consist of a thermoplastic polymer; are arranged in a geometrical and preferably symmetrical pattern relative to each other and/or the longitudinal axis of the string; and at least three of the island components have a cross-section that has a multi-angular shape, with one side leaning close against the surface of the string. The one side has a curvature that closely lines the curve of the string surface, and the sea component largely but not exclusively consists of a thermoplastic elastomer.

Abstract: The present invention provides novel conjugate fibers being excellent in productivity and having good water absorption, antistatic property and cool feeling by contact. The conjugate fibers include a fiber-forming resin such as polyamide, polyester and the like in the sheath portion and a polyether block amide copolymer in the core portion, in which the area ratio of the core portion to the sheath portion is 5/95 to 95/5, and the exposure angle of the core portion to the surface is 5° to 90°. Specifically it is preferable that the area ratio of the core portion to the sheath portion is 10/90 to 90/10, the exposure angle of the core portion to the surface is 5° to 80°, and the crimp ratio is 2 to 30%.

Abstract: An integrally formed multi-component structure is disclosed, the multi-component structure comprising a plurality of components, at least one of which is a three-dimensional bonded fiber fluid transmissive component comprised of a plurality of polymeric fibers bonded to each other at spaced apart contact points, the fibers collectively defining tortuous fluid flow paths, and wherein each component has an interface with at least one other component.

Abstract: A fabric including microdenier fibers is provided, the microdenier fibers prepared by fibrillating a multicomponent, multilobal fiber including a contiguous core fiber component enwrapped by a multilobal sheath fiber component such that the sheath fiber component forms the entire outer surface of the multicomponent fiber, wherein the core fiber component and the multilobal sheath fiber component are sized such that the multicomponent, multilobal fiber can be fibrillated to expose the core fiber component and split the fiber into multiple microdenier fibers.

Abstract: Disclosed are bicomponent fibers with aliphatic polyester forming a first component and a polyolefin forming a second component wherein the polyolefin contains an adjuvant improving the biodegradability of said polyolefin. Textile sheets comprising these bicomponent fibers are comparable in their mechanical properties to polyolefin based textile sheets while these are more efficiently decomposed by the action of microorganisms as polyolefin based textile sheets.

Abstract: A multi-component fibre includes at least two elongated fibre bodies. A first fibre body consists of a first material including a phase change material and a second fibre body consists of a second material and encloses the first fibre body. The phase change material is non-encapsulated or in raw form and the first material includes a viscosity modifier selected from polyolefines having a density in the range of 890-970 kg/m3 as measured at room temperature according to ISO 1183-2 and a melt flow rate in the range 0.1-60 g/10 minutes as measured at 190° C. with a 21.6 kg weight according to ISO 1133. Further, a textile, a fabric and an absorbent article include the multi-component fibre.

Abstract: The present invention provides a non-twisted yarn and an extrusion coated reinforcement yarn and their methods of manufacture, by coating non-twisted glass filaments with a sizing composition and combining the filaments together side-by-side to provide a sized non-twisted yarn, wherein the sizing composition becomes ductile in a molten thermoplastic resin to free the non-twisted glass filaments for radially inward movement while in the molten thermoplastic resin to provide the non-twisted yarn with an essentially round cross-section suitable for extrusion coating with the molten thermoplastic resin.

Abstract: A fluorescent fiber and an anti-counterfeiting material have an optical color that varies with irradiation angles of exciting light. The anti-counterfeiting fiber includes at least two components of materials that extend parallel along the longitudinal direction without twisting. At least one component contains photoluminescence material. The distribution of the components makes the anti-counterfeit fiber form a shielding structure for exciting light, and has an orientation structure. The exciting light shielding structure and orientation structure enable, when the anti-counterfeit fiber falls freely into a plane paralleled to the horizontal plane, the existence of at least two irradiation angles of exciting light above the plane paralleled to the horizontal plane, from which exciting light irradiates on the anti-counterfeit fiber respectively. The anti-counterfeit fiber thereby displays obvious visual difference between two different luminescent colors.

Abstract: A bicomponent fiber is obtainable from or comprises an ethylene/?-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle and a density, d, in grams/cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re>1481?1629(d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven or non-woven fabrics, such as spunbond, melt blown and spun-laced fabrics or webs can be made from such fibers.

Abstract: A biomedia apparatus comprising an elongated central core and a plurality of loops positioned along the central core adapted to collect organisms from water. The biomedia apparatus may further comprise at least one reinforcing member associated with the central core. In one embodiment, the biomedia apparatus is utilized in a trickle tower to treat wastewater. In another embodiment, the biomedia apparatus is utilized outside a power plant to minimize spat that is drawn into the plant through water intake valves.

Abstract: The present invention provides nanowires which are substantially straight and substantially free of nanoparticles and methods for making the same The nanowires can be made by seeded approaches, wherein nanocrystals bound to a substrate are used to promote growth of the nanowire. Nanocrystals in solution may also be used to make the nanowires of the present invention. Supercritical fluid reaction conditions can be used in a continuous or semi-batch process.

Abstract: Fibers that durably contain antimicrobial materials such that the antimicrobial materials are resistant to being abraided away or washed off during use. The antimicrobial materials contained in the fibers are not prone to the development of resistant strains of bacteria. Also disclosed are methods of making and using the fibers.

Abstract: [PROBLEMS] To provide a polyester monofilament which shows a high dimensional stability and excellent effects of preventing peel-off in filaments, preventing pirn barre and preventing halation and has a high fineness, a high strength and a high modulus. [MEANS FOR SOLVING PROBLEMS] A core-shell type composite polyester monofilament comprising polyethylene terephthalate at a ratio of 80% by mol or higher, which satisfies the following requirements A to F: A) the intrinsic viscosity of the core component being 0.70 or above and the intrinsic viscosity of the shell component being from 0.55 to 0.60; B) the core component amounting to 50 to 70%; C) at least the shell component containing from 0.2 to 0.4% by weight of metal microparticles; D) the fineness of the monofilament being from 5 to 15 dtex, its modulus at elongation of 5% being from 3 to 4.5 cN/dtex and its elongation at break being from 20 to 40%; E) the free shrinkage of the innermost part under specific conditions being 0.

Abstract: A nonwoven fabric containing a polyvinyl butyral fiber is provided. In particular, continuous fiber nonwoven fabrics, such as a melt-blown nonwoven fabric and a spunbonded nonwoven fabric, are preferred. By laminating a plurality of layers via an adhering layer made of such a nonwoven fabric and then heating, a laminate is obtained by a simple process. In particular, an interior material in which an inorganic fiber layer, a foam layer and a surface material layer are adhered together via the aforementioned type of adhering layers is a desirable embodiment. Such an interior material is excellent in rigidity, sound absorbency and thermal deformation resistance, and therefore is useful as an interior material to be used for cars, railway vehicles, vessels, and the like.

Abstract: The invention relates to a method and a device for producing a multi-colored composite thread made of a plurality of extruded colored filament bundles. To this end, a plurality of different dyed polymer melts is generated and extruded in parallel through a plurality of spinnerets to form the colored filament bundles. The colored filament bundles are brought together as a mixed color to form the composite thread. In order to generate a color pattern or to correct the mixed color of the composite thread, according to the invention, the generation of the dyed polymer melts is modified during the extrusion of the filament bundle in order to modify the mixed color of the composite thread.

Abstract: An ultrafine composite fiber of the present invention is obtained by heating and melting a composite-resin-formed product in front of a supply-side electrode and/or in a space between electrodes and extending the composite-resin-formed product by electrospinning, wherein the composite-resin-formed product is a solid-state composite-resin-formed product having two or more phases and including a resin that has a volume specific resistance of 1015 ?·cm or less, and that is exposed on 30% or more of a surface of the composite-resin-formed product. With this, an ultrafine composite synthetic fiber and an ultrafine synthetic fiber can be obtained by electrospinning, without a solvent being mixed in a supply resin, and further, a method for manufacturing an ultrafine composite fiber, as well as a fiber structure containing an ultrafine composite fiber, are provided.

Abstract: Tacky polymeric fibers having a nontacky core and a tacky outer shell.

Abstract: Insulated electrically conductive fibers or microwires of sizes on the order of 1 mil (25 microns) diameter, so as to be suitable for processing into yarns or multi-microwire bundles, for example, for incorporation into conformable fabric products or for use as wearable electronic circuitry are made by coprocessing a core of a lower-melting-point metal within a sheath of a higher-melting-point polymer.

Abstract: Substantially isotaclic propylene interpolyraets comprise (A) at least 60 weight percent (wt %) units derived from propylene, and (B) between greater than zero and 40 wt % units derived from ethylene, the propylene interpolyrner further characterized by at least one of the following properties: (1) a ratio of less than 1 measured at interpolyraer number average molecular weight (Mn), (2) a relative compositional drift of less than 50%, arid (3) propylene chain segments having a chain isotacticity triad index of at least 70 mole percent.

Abstract: An elevator support, such as a cable or a belt connected with an elevator car or counterweight, has load-bearing synthetic material strands, which are reinforced by the introduction of a second phase and have a higher modulus of elasticity than that of the unreinforced strands.

Abstract: An integral composite fiber is formed by integrally joining a stretchable fiber and unstretchable fibers. The stretchable fiber has longitudinally extending first exposed surfaces that are circumferentially spaced from each other. The unstretchable fibers has longitudinally extending second exposed surfaces each disposed between a circumferentially adjacent pair of the first exposed surfaces. One of the first exposed surfaces has a larger surface area than the other or others of the first exposed surfaces. Said other or each of the others of the first exposed surfaces has a surface area ratio of less than 0.8 with respect to the surface area of said one of the first exposed surfaces.

Abstract: A power transmission belt incorporating an adhesive treatment system and method for bonding fiber to rubber which includes an optional primer coat based on a low-molecular-weight isocyanate, followed by an overcoat including: (a) a prepolymer based on an isocyanate-terminated diene oligomer, and optionally (b) a low-molecular-weight isocyanate, and/or (c) a thermoplastic urethane comprising the reaction product of the same prepolymer with MDI and EHD. A polyester, aramid, or carbon fiber tensile cord for rubber reinforcement may be treated with the primer coat and the overcoat. A power transmission belt or other dynamic rubber product having ethylene-alpha-olefin elastomer as the primary rubber constituent may be reinforced by the tensile cord.

Abstract: This invention relates to: a molding material comprising a bundle of continuous reinforcing fibers (A), a polyarylene sulfide prepolymer (B) comprising at least 50% by weight of cyclic polyarylene sulfide and having the weight average molecular weight of less than 10,000 or polyarylene sulfide (B?) having the weight average molecular weight of 10,000 or greater and the degree of dispersion of 2.

Abstract: In an electrically conductive sheath-core conjugate fiber including an electrically conductive layer made of a thermoplastic polymer (A) containing electrically conductive carbon black fine particles which constitutes a sheath component and a protective layer made of a fiber-forming thermoplastic polymer (B) which constitutes a core component, the ratio of the (A) to the total weight of the (A) and the (B) is 10 to 35% by weight, the L1/L0 ratio is 1.04 to 10.0 where L1 represents the length of a boundary between the core component and the sheath component in a cross section of the conjugate fiber and L0 represents the length of the circumference of a circle having an area equal to a cross sectional area of the core component, the fineness, the strength at break and the elongation at break are each adjusted within specified ranges, the shrinkage in hot water at 100° C. is within a specified range, and the fiber surface coverage of the sheath component is 85% or more.

Abstract: A spun yarn formed with a core of microdenier synthetic filaments wrapped with a sheath. The sheath generally includes carded staple fibers that are spun around the core.

Abstract: An object of the present invention is to provide an oil agent composition which can improve the reduction in operability occurring when an oil agent composition containing a silicone compound is used as the main component and the reduction in the physical properties of the carbon fiber bundle occurring when a non-silicone-based oil agent composition is used. The oil agent composition for acrylic precursor fibers for carbon fibers of the present invention contains 1 to 10 wt % of a modified polydimethylsiloxane including a unit having a specific alkyl chain, at least one unit selected from the group consisting of a unit having a specific polyethylene oxide chain, a unit having a specific polyglycerin chain, and a unit having a specific polyether chain, and optionally a unit having a specific polydimethylsiloxyalkyl chain.

Abstract: The process serves for producing a sheetlike article, for example a climbing skin (1) for skis, a slide-mat or a velour. Said sheetlike article has at least one glidable surface (4) produced from fibres (5). At least a portion of these fibres (7) is produced from a base material (6) and a glide material (7) uniformly dispersed in said base material (6). The base material (6) is preferably a thermoplastic material. The glide material (7) is admixed to this base material (6) in an extruder. The article produced by this process has gliding properties which are preserved in use.

Abstract: To provide an add-in material to be added to a porous molded body base, the add-in material being capable of developing a pore of appropriate size efficiently without degrading the formability and productivity of a porous molded body, particularly a porous fired body when producing the porous molded body. A shrinkable fiber composed of a thermoplastic resin and to be dispersed in a base of a porous molded body, particularly a porous fired body, wherein the shrinkable fiber has a fiber diameter of 10 to 40 ?m, a fiber length of 1 to 20 mm, and a dry-heat shrinkage percentage of at least 8% when subjected to heat treatment at 80° C. for 5 minutes.

Abstract: Self-crimping fully drawn high bulk yarns comprising fiber forming bicomponent filaments comprising two polymers having different crystallizability or differential orientation or combination thereof is disclosed herein. Further the present invention discloses a method for producing the self-crimping fully drawn high bulk yarns by single and two-stage process. The invention also discloses the fabric comprising the self-crimping fully drawn high bulk yarns.

Abstract: Cellulosic fibers having enhanced reversible thermal properties and applications of such cellulosic fibers are described. In one embodiment, a cellulosic fiber includes a fiber body including a cellulosic material and a set of microcapsules dispersed in the cellulosic material. The set of microcapsules contain a phase change material having a latent heat of at least 40 J/g and a transition temperature in the range of 0° C. to 100° C., and the phase change material provides thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature. The cellulosic fiber can be formed via a solution spinning process, and can be used in various products where thermal regulating properties are desired.

Abstract: Conjugate fibers are prepared in which at least one segment is a mixture of a high-D PLA resin and a high-L PLA resin. These segments have crystallites having a crystalline melting temperature of at least 200° C. At least one other segment is a high-D PLA resin or a high-L PLA resin. The conjugate fibers may be, for example, bicomponent, multi-component, islands-in-the-sea or sheath-and-core types. Specialty fibers of various types can be made through further downstream processing of these conjugate fibers.

Abstract: The present invention relates to novel methods and compositions for detection and isolation of cancer cells with metastatic potential. The invention further relates to assays for measuring the metastatic potential of such cancer cells and drug screening assays for the identification of agents having anti-metastatic potential. The present invention further provides methods and compositions for inhibiting the metastatic potential of cancer cells by modulating the activity of serine integral membrane proteases [(SIMP) consisting of seprase and dipedidyl peptidase IV (DPPIV)] expressed on the surface of metastasizing cancer cells.

Abstract: A flexible nonwoven mat of polymeric fibers is liquid water transmission resistant and is particularly well suited for use as a prefabricated building construction underlayment. The polymeric fibers may be standard polymeric fibers or sheathed polymeric fibers that have fiber sheaths with a lower softening point temperature than the softening point temperature of the fiber cores. Preferably, the polymeric fibers are spunbond fibers and are bonded together through the application of heat and pressure. Where the fibers are sheathed fibers, interstices of the nonwoven mat are at least partially filled by a portion of the polymeric material of the sheaths that is dispersed into the interstices to reduce the porosity of the mat.

Abstract: A fiber modifier for improving thermo-bonding affinity of a composite fiber to a natural fiber includes a blend of maleic anhydride and a copolymer component selected from a copolymer of ethylene and acrylic acid, a copolymer of ethylene and methacrylic acid, and combinations thereof. A core and sheath composite fiber including a sheath component made from a fiber composition that contains the above fiber modifier is also disclosed.

Abstract: Hydrophilic porous substrates, methods of making hydrophilic porous substrates from hydrophobic polymers are disclosed.

Abstract: A manufacturing method and apparatus for producing digital yarns using hybrid metal for high speed communication, which can be connected to a network to exchange information in real time in the ubiquitous era, and digital yarns made using the method thereof. The manufacturing method and apparatus for producing digital yarns using hybrid metal for high speed communication and digital yarns thereof comprises producing a hybrid metal rod; drawing the hybrid metal rod; producing a micro filament; feeding the micro filament; softening the micro filament; forming a sliver; forming a spun yarn; winding the spun yarn; coating the spun yarn with an electromagnetic shielding resin; drying the spun yarn with the electromagnetic shielding resin; and covering the spun yarn with a textile yarn and the digital yarn made in accordance with this method.

Abstract: A powder coated roving material for making structural parts is provided. The powder coated roving includes a bundle of fibers at least substantially coated with a powder coating material. The bundle is formed of a plurality of inner fibers and a plurality of outer fibers surrounding the inner fibers. The size composition maintains the fibers in a bundled orientation during processing and releases the fibers during molding. The size composition includes an epoxy resin emulsion containing at least one surfactant and a solid epoxy resin having an epoxy equivalent weight from about 450 to about 950, at least one epoxy silane coupling agent, at least one non-ionic lubricant, at least one cationic lubricant, and at least one organic acid. In addition, the size composition may have an acetone solubility from about 30% to about 75%. A method of making a composite roving is also provided.

Abstract: A pre-charged material including silicon-comprising fibres characterised in that two or more of the fibres are bonded together to create both a bonded felt anode structure, with or without a current collector, and a composite anode structure with a current collector and an electrode structure. The structure overcomes problems associated with charge/discharge capacity loss.

Abstract: Multi-component fibers having enhanced reversible thermal properties and methods of manufacturing thereof are described. In one embodiment, a multi-component fiber includes a fiber body formed from a set of elongated members, and at least one of the set of elongated members includes a temperature regulating material having a latent heat of at least 40 J/g. The temperature regulating material provides thermal regulation based on at least one of absorption and release of the latent heat at the transition temperature. The multi-component fiber can be formed via a melt spinning process or a solution spinning process and can be used or incorporated in various products where a thermal regulating property is desired. For example, the multi-component fiber can be used in textiles, apparel, footwear, medical products, containers and packagings, buildings, appliances, and other products.

Abstract: A fiber containing an eggshell membrane component. The fiber is produced by spinning using a solution containing the eggshell membrane component by employing an electrospinning method. A fiber assembly formed from the fiber obtained by employing the electrospinning method imitates a natural eggshell membrane, whereby sufficient air permeability is exhibited. Since the fiber assembly is also excellent in adherence to skin tissue of a human body and stypticity, the fiber assembly may be preferably used as a wound dressing or a cosmetic sheet.

Abstract: An electrically conductive composite fiber comprising an electrically conductive layer formed of a polyester-based polymer (A) having a melting point of 200° C. or higher and containing from 23 to 33% by weight of electrically conductive carbon black, and a protective layer formed of a polyester-based polymer (B) having a melting point of 210° C. or higher, wherein the difference between the SP value of the (A) and the SP value of the (B) is adjusted to not greater than a predetermined value and the fiber strength and the elongation at break are adjusted within certain ranges. This can make it possible to obtain an electrically conductive composite fiber that has a superior antistatic performance, which is not degraded very much over a practical wearing for a long term, though it contains only a relatively small amount of electrically conductive carbon black, and that is suitable for the field of clothing such as clean room wears and working wears.

Abstract: A multi-layered fiber including a core, a first layer, and a second layer. The core has an exterior surface portion containing polypropylene. The first layer is disposed on at least a portion of the core and contains a first polymer. The first polymer contains a polymer having at least 70% ?-olefin units and is characterized by a melting temperature lower than the melting temperature of the exterior surface portion of the core. The second layer is disposed on at least a portion of the first layer and contains a second polymer. The second polymer contains a co-polymer having at least 50% ?-olefin units and is characterized by a number-average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 cP measured at 170° C., and a melting temperature lower than the melting temperature of the exterior surface portion of the core. The viscosity of the second polymer is not greater than about 10 percent of the viscosity of the first polymer measured at 170° C.

Abstract: This invention provides security articles comprising fibers, threads and fiber sections (“dots”) possessing multiple verification characteristics. The fibers possess unique and difficulty duplicated combinations of complex cross-sections, components, and multiple luminescent responses. The many verifiable characteristics of the security fibers, threads and dots provide high levels of protection against fraudulent duplication of articles in which they are incorporated. The manifold security features provide means of tailoring specific identity characteristics for specific use and users.