Abstract: A bioabsorbable drug delivery device and various methods of making the same. The devices are preferably formed from bioabsorbable materials using low temperature fabrication processes, hereby drugs or other bio-active agents are incorporated into or onto the device and degradation of the drugs or other agents during processing is minimized. Radiopaque markers may also be incorporated into, or onto, the devices. The devices may be generally tubular helical stents comprised of a solid ladder or an open lattice configuration, or a hybrid combination thereof. The tubular helical stents are generally formed from precursor fibers, films or tubes. The solid ladder configuration provides increased radiopacity and increased radial strength, whereas the open lattice configuration provides better endothelialization and fluid flow through the stent.

Abstract: Process for the manufacture of a spun fleece web made of filaments and particularly made of filaments made of thermoplastic synthetic material. The filaments are spun out of a mixture comprising at least one polymer and at least one hydrophilic additive and are plaited to form the fleece web. The fleece web is heated to a temperature of at least 30° C. and/or moistened with an aqueous liquid. The fleece web is thereafter hydrodynamically compacted.

Abstract: The object is to provide a method for manufacturing liquid crystalline resin composition having a hollow filler and a fibrous filler using a common melting-kneading extruder to maintain well-balanced relation between the residual percentages of hollow filler and the fiber length, which balance could not be attained in the prior art. A liquid crystalline resin composition having 5 to 30% by weight of hollow filler and 5 to 30% by weight of fibrous filler is manufactured using a melting-kneading extruder provided with a screw. (1) The liquid crystalline resin is fed from a main feed port located at upstream side in the extruding direction, while a hollow filler and a fibrous filler are fed from a side feed port located at downstream side in the extruding direction.

Abstract: The invention relates to a process for producing cellulosic shaped articles with stabilized inclusions in a microfine dispersion of nonpolar organic compounds and mixtures by a dry-wet extrusion process. The shaped articles produced in this way exhibit by comparison with unmodified cellulose fibers a substantially increased storage capacity for heat and/or nonpolar active substances. They are suitable in particular for use in textiles for clothing, industrial textiles, leisure, medicine and cosmetics. Potential functional effects imparted include the physical effect of heat storage and/or the uniform and finely meterable storage and release of nonpolar active substances and plant extracts from the interior of the fibers of the shaped articles. It is possible through a suitable choice of the nonpolar portion to produce by this process also fibers capable of absorbing liquid or gaseous nonpolar substances.

Abstract: A processing agent for processing urethane elastomer fibers contains a disperse medium of a specified kind having mineral oil as its principal component and a dispersoid of a specified kind including aliphatic ester compound. The disperse medium is 80-99.99% by mass and the dispersoid is 0.01-20% by mass for a total of 100% by mass. The average particle size of the dispersoid is prepared to be in the range of 0.01-500 ?m as measured by a specified measuring method.

Abstract: The present invention relates to articles with antibacterial and antifungal activity, comprising zinc sulphide. The yarns, fibres, filaments and articles according to the present invention may be used especially in the manufacture of any product liable to be placed in contact with bacteria and/or fungi, for instance clothing, rugs, curtains, bedclothes and medical textile materials. The present invention also relates to the use of zinc sulphide for manufacturing yarns, fibres, filaments and/or articles with antibacterial and antifungal properties.

Abstract: Methods of tailoring polyethylenes are contemplated utilizing 0.5 to 70 volume percent oxygen containing gases. The tailoring occurs in a melt-conveying zone of a mixer/extruder, and not in the feed or melting zones of a mixer/extruder. The effect of tailoring is to decrease the haze and/or increase the gloss of blown films made from the tailored polyethylenes compared to similar polyethylenes that are extruded/mixed in the substantial absence of oxygen or oxygen containing gases.

Abstract: A method is provided for obtaining a polyarylene sulfide resin composition with a low chlorine content, which has high fluidity and high quality and produces less burrs. Specifically, a method is provided wherein a polyarylene sulfide resin composition is produced by melting and mixing (A) a polyarylene sulfide resin, (B) an inorganic filler, and (C) an alkoxysilane compound. In this method, (A) a polyarylene sulfide resin having a melt viscosity of 80-400 Pa·s (at a temperature of 310° C. and a shear rate of 1200/sec) and a chlorine content of 1000-2000 ppm is supplied from a raw material feed port of a specific extruder, and then extruded at two kneading parts within the range of [shear rate (1/sec)×kneading time (sec)=1600-6000], thereby producing a polyarylene sulfide resin composition having a melt viscosity of 150-330 Pa·s (at a temperature of 310° C. and a shear rate of 1200/sec) and a chlorine content of not more than 950 ppm.

Abstract: The present invention relates to the use of a microcrystalline polyamide for obtaining an object having all or part of its outer surface formed from this microcrystalline polyamide and having a particular surface finish, in which: the manufacture of the object comprises steps carried out hot between the Tg (glass transition temperature) and the Tm (melting point) of this microcrystalline polyamide; the transparency of the microcrystalline polyamide is such that the light transmission at 560 nm on a polished object 1 mm in thickness is greater than 80%, advantageously greater than 88%, the transparency being measured on the object obtained by standard processing methods, such as injection moulding and sheet extrusion/calendering. Advantageously, the microcrystalline polyamide is such that its degree of crystallinity is greater than 10% and less than 30% (1st DSC heating according to ISO 11357 at 40° C.

Abstract: The method for the continuous production of a composition comprising rubber (20), hydrocarbon resin (22), and solvent (26) provides for the use of a dual-screw extruder (10), for example, a co-rotating dual-screw extruder. Preferably, at least a fraction of the solvent (26) is added at a point of the extruder (10) that is downstream of the initial section, for example, at a distance of at least 4 D from the initial section of the extruder (10).

Abstract: Provided is a fiber-reinforced thermoplastic resin molded article, which contains reinforcing fibers having a given flattened cross-sectional profile, in which the fiber length distribution of the reinforcing fibers is shifted on the side of long fibers, and which is excellent in mechanical strength, heat resistance, dimensional accuracy such as warpage resistance, and surface appearance.

Abstract: Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized by comprising multi-stage injection of a coagulant with sulfuric acid concentration lowered sequentially stage by stage, to a spun material fed into a coagulant injection tank. The present invention enables increase of a spinning and take-up velocity without occurrence of thread cutting by uniformly and evenly coagulating surface and inside of the spun material. In addition, the present invention recovers the coagulant or water already used and reuses the recovered coagulant or water in the earlier stages, so that it has advantages of saving production costs and reducing environmental contamination. Accordingly, the wholly aromatic polyamide filament produced according to the present invention has high crystallinity X, large apparent crystal size ACS and reduced defects in the crystal itself, thereby exhibiting more improved physical properties such as strength and modulus.

Abstract: To produce filled thermoplastic polymers starting from a waste thermoplastic base material, the base thermoplastic material is fed into a container (1) provided with a device for mixing and stirring (2,3) in which the base thermoplastic material is softened, the required filler is fed into said device and stirring is continued to thoroughly blend filler and softened material, subsequently collecting the softened and filled material from said container and subjecting it to an extrusion or other densification step.

Abstract: Strengthened filaments and fibers are realized by mixing and dissolving monomer and catalyst in a solvent into open-ended nanotubes to form a polymer precursor prior to polymerization in which the open nanotubes are filled with monomer and catalyst. The remaining steps for forming a stabilized filament may follow the conventional sequence. The result is that the nanotubes are “doubly-embedded” in the polymer matrix (bonds to the polymer inside and extending through the nanotube and bonds to other polymer chains outside the nanotube) in the filament. These additional bonds provide additional mechanical strength. The number of bonds may be further enhanced by pretreating the nanotubes to create defects in the nanotubes to form sites along the inner and outer walls for additional polymer-to-nanotube bonds.

Abstract: The present invention provides a heat-foamable sheet that foams uniformly and omnidirectionally, a method for producing the heat-foamable sheet, and a foam filling member including the heat-foamable sheet. A heat-foamable sheet having a horizontal to vertical ratio of 1.5 or less when heated at 160° C. for 20 minutes is obtained by a method for producing a heat-foamable sheet including: an extrusion step of extruding a heat-foamable material containing a polymer and a foaming agent into an isotropy-containing shape including an isotropic portion of a generally arc shape; and a sheet-forming step of forming the heat-foamable material that is extruded in the extrusion step into a sheet shape.

Abstract: Reflective pellets (16) are formed by extrusion of reflective micro beads (26) in a thermoplastic (20), removal of the surface layer of the pellets so as to expose the reflective beads at the surface of the pellets and applying the reflective pellets to the base line (14) of the striping applied to a paved road.

Abstract: Disclosed are composite compositions well suited for forming shaped articles which comprise thermoplastic polymer, cellulose, a coupling agent comprising anhydride moities, and a lubricant comprising an alkyl ester of carboxylic acid. Preferably the lubricant is substantially free of zinc stearate.

Abstract: The present invention relates to a process for the production of polypropylene articles with improved response to a surface energy increasing treatment, wherein the polypropylene comprises a metallocene-catalyzed polyethylene. The present invention further relates to the use of metallocene-catalyzed polyethylene as an additive for improving the response of polypropylene to surface energy increasing treatments.

Abstract: Articles such as melt spun elastic tape and heaving denier monofilament fibers are made from thermoplastic polyurethane (TPU) polymers. The process to make the articles involves using a substantially horizontal cooling to cool the melt spun articles. Preferably, the cooling is accomplished by a water bath. A crosslinking agent is added to the TPU polymer melt to enhance the elastic properties of the articles.

Abstract: A thread for forming a vascular stent implanted in vessels is provided. This thread is formed by melt-spinning a biodegradable polymer. On the surface of the thread, there is formed a layer of a drug-containing biodegradable polymer of the same sort as the biodegradable polymer constituting the thread.

Abstract: Methods of extruding polyurethane composite materials are described. One method includes introducing at least one polyol and inorganic filler to a first conveying section of the extruder, transferring the at least one polyol and inorganic filler to a first mixing section of an extruder, mixing the at least one polyol and the inorganic filler in the first mixing section, transferring the mixed at least one polyol and inorganic filler to a second conveying section of the extruder, introducing a di- or poly-isocyanate to the second conveying section, transferring the mixed at least one polyol and inorganic filler and the di- or poly-isocyanate to a second mixing section, mixing the mixed at least one polyol and inorganic filler with the di- or poly-isocyanate in the second mixing section of the extruder to provide a composite mixture, and transferring the composite mixture to an output end of the extruder. Other related methods are also described.

Abstract: A method for manufacturing a carbon nanotube composite, comprising the steps of:(a) preparing a solution of a polymer precursor; (b) immersing carbon nanotubes in the solution and ultrasonically cleaning the solution; (c) polymerizing the polymer precursor in order to obtain a polymer matrix having carbon nanotubes uniformly dispersed therein; (d) forming the polymer matrix into a composite having carbon nanotubes distributed therein by way of extrusion; and (e) elongating the composite so as to cause the carbon nanotubes to be orderly distributed therein.

Abstract: (EN) The invention concerns a method for producing a thermoplastic molding material or element, said material or element containing nanometric inorganic particles. In molten state, the thermoplastic is mixed with the nanometric inorganic particles and with a solubilizing agent in a conveyor screw extruder, the pressures and temperatures being adjusted so that the plastic is in melt form and the solubilizing agent in supercritical state. The invention is characterized in that at the output of the extruder, the mixture passes through a slot with a passage less than 20 $g(m)m to penetrate into an expansion zone and the molten material, wherein are incorporated the nanometric inorganic particles, is evacuated, reduced into molding material after cooling or transferred into a molding tool to be molded. The invention also concerns the molding material and the molding elements obtained by this method, as well as the uses thereof.

Abstract: A method for combining materials (such as impregnating materials with functional materials) uses a combination of supercritical fluid technology and polymer melt processing technology. The functional material is soluble in a near supercritical or supercritical fluid, which dissolves in the matrix/bulk material during melt processing. Controlling the processing conditions facilitates a change of state for the fluid, which results in the precipitation of the functional material in the bulk material. The impregnated bulk material may be shaped using conventional polymer based processing techniques such as extrusion and injection moulding.

Abstract: The invention relates to a process for melt-shaping a polymer composition wherein the constituent components for the polymer composition are supplied directly to the shaping device in the form of a mixture of granules on or in which the constituent components are present. The granule mixture contains at least 3 granule-fractions containing the matrix polymer that differ in composition. The invention also relates to the granule mixture suitable for the melt-shaping process, the installation for the preparation and the process for preparing the granule mixture. The process results in a greater reproducibility and in articles with improved properties.

Abstract: A method and system for making a composition for use in manufacturing an implantable medical device, such as a drug-eluting and/or delivery stent, is described. The method includes introducing a polymer, active agent, and a solvent into a mixing apparatus such as an extruder. The polymer, active agent, and solvent may be mixed in the apparatus to form a homogeneous or substantially homogeneous polymer mixture. The method may further include controlling a temperature of the polymer mixture in at least a portion of the apparatus. In an embodiment, the polymer mixture may be used as a coating for an implantable medical device, or fabricating an implantable medical device. The invention also includes a composition formed by the method described above.

Abstract: A method of forming a reinforced building product from garbage, comprising the steps of sorting garbage, shredding plastics within the garbage, shredding fibers within the garbage, heating the shredded plastics, forming a slurry from the plastics and fibers, disposing the slurry within an extrusion cavity, extruding the fluid through a venturi, and allowing the extruded materials to cool. Garbage is separated into plastics, fibers, and other materials. Plastics are shredded to facilitate melting. Fibers are shredded to macroscopic lengths no greater than a maximum internal diameter of a venturi. The plastics are melted. The melted plastics are mixed with fibers and other material to form a slurry that is extruded from a cavity through a venturi, thereby causing significant alignment of the shredded fibers within the slurry in an outer region of the extruded slurry. Cooled, there is reinforced building material.

Abstract: The present relates to the field of dental and bone surgery. In particular, the invention relates to fibrous pharmaceutical compositions; fibrous webs, yarns and woven fabrics of such pharmaceutical compositions; to implant material essentially consisting of fibrous pharmaceutical compositions; to the manufacturing and use of such fibers/webs/implant materials.

Abstract: A method of treating a polymer compound has the steps of: mixing and agitating the polymer compound and a chemical agent in an extruder while controlling the inside of the extruder to be kept at a high temperature and a high pressure to have a reaction mixture containing a polymer treated product; supplying the reaction mixture continuously into a high-pressure container disposed following the extruder and retaining the reaction mixture at the high temperature and high pressure for a predetermined time; then supplying the reaction mixture continuously to a chemical agent separator to separate the polymer treated product; and supplying the separated polymer treated product continuously to a molding means to form it into a molded material.

Abstract: Process for production of polymer blends which are suitable as filter aids and are composed of polystyrene and of crosslinked water-insoluble polyvinylpyrrolidones via processing of the two components in an extruder, which comprises melting polystyrene in an extruder and then treating it with the polyvinylpyrrolidone, and adding, to the mixture of the components, from 0.1 to 10% by weight of water, based on the total amount of polystyrene and popcorn polymer, and extruding and comminuting the mixture.

Abstract: The invention relates to a method for producing a wood-plastic composite material, by which means the composite material is provided with a pre-determined color and pre-determined material characteristics during the course of the method. The method according to the invention is characterized by the drying and treatment of the wood chips using chromophore substances and/or active substances in a fluidized bed appliance during one of the method steps preceding the extrusion. Following the treatment, sorted wood chips can be removed from the fluidized bed within a pre-selected dimension spectrum and extruded with plastic in the subsequent method step.

Abstract: The present invention relates to the extrusion of a composition comprising tetrafluoroethylene/hexafluoropropylene copolymer, 10-60 wt % inorganic particulate filler, and hydrocarbon polymer for dispersing the filler in the copolymer, preferably 0.1 to 5 wt % hydrocarbon polymer, at low temperatures, e.g. up to 650° F. (343° C.).

Abstract: Provided is a composition comprising fatty acid bis-amide, inorganic particulate such as pumice, cellulosic particulate, thermoplastic and maleic anhydride grafted polyolefin. The combination of an ethylene bis-amide and a minor amount of pumice produces cellulosic-thermoplastic composite that has superior extrusion properties over conventional metal stearate/ethylene bis-stearamide (EBS) compositions such as improved flex strength and resistance to water absorption.

Abstract: A process for the extrusion of peroxide crosslinked polymer parts, mainly tubes, in which the crosslinkable polymer is heated in an extruder in a controlled manner to a value above the crystallite melting point of the polymer, but below the crosslinking temperature, and fed continuously to an extrusion die to create the part and in which at least a partial crosslinking of the polymer is achieved in the extrusion die by heating of the polymer above a crosslinking temperature provision.

Abstract: Method for production of candles wherein at least two fuel components are mixed together which before mixing each have a different temperature and which are the same or different in chemical composition. The first fuel component has a high temperature, wherein this is too plastic or fluid to be able to be processed or packed as a candle. The second fuel component has a lower temperature and is preferably granular whereby this functions as a cooling means to bring the first fuel component to hardening or setting.

Abstract: The instant invention generally provides a process for extruding a melt of a mixture comprising a molecularly self-assembling (MSA) material and at least one first rheological additive to give a shaped MSA material, a shaped MSA material produced by the process, and an article comprising the shaped MSA material. The instant invention also generally provides a composition comprising a MSA material and at least one second rheological additive, a process of electrospinning the composition, and a fiber prepared by the electrospinning process.

Abstract: The invention relates to a method for the production of cellulose shaped bodies according to the dry-wet extrusion method (Lyocell method) with high degree of whiteness and bioactive action for use in the textile sector and paper production. In the context of the invention, the term “bioactive” refers to antimicrobial efficacy, based on the antibacterial action of the element silver, which is used as nanoscale reagent for increasing the efficacy thereof. The chemically inert and, at the same time, bactericidal effect is used in the production of sports and leisure clothing with a high degree of whiteness and papers with a long shelf life. Use is possible in the medical sector, for example, for wound dressings, textiles for hospitals, and in the filter and packaging industry.

Abstract: A process for manufacturing a water-resistant telecommunication cable. The cable has a solid and compact element having a water-soluble polymer material having vinyl alcohol/vinyl acetate copolymer having a hydrolysis degree of 60-95% and a polymerisation degree higher than 1,800 and at least one solid low-melting and one solid high melting plasticizers. The process produces continuously the water-soluble polymer material by separately feeding, in sequence, a multi-screw extruder, in the flow direction, with the copolymer and the high melting plasticizer melting and mixing them while transporting them through the extruder, and with the low melting plasticizer, melting and mixing them with the copolymer and the high melting plasticizer, subsequently homogenizing the copolymer and the plasticizers and finally discharging the melt, at a temperature lower than or equal to 205° C. A process for extruding the above PVA based water-soluble polymer material.

Abstract: Disclosed are plastic compositions for a carpet backing having from about 5 to about 25% by weight PVC resin, from about 5 to about 25% by weight plasticizer, and from about 50 to about 90% by weight filler. In a preferred embodiment, the plastic composition is about 15% by weight Geon-138, about 15% by weight di-isononyl phthalate, and about 70% by weight fly ash. Also disclosed are methods for forming backings for floorcoverings using the disclosed plastic compositions. In preferred embodiments, a plastic composition is applied through a slot-die directly to the underside of a carpet or alternatively onto a conveyor belt on top of which the carpet or floorcovering may be subsequently positioned.

Abstract: The present invention relates to a polymer mixture comprising polylactic acid. The invention furthermore relates to a method for producing an extruded product and the extruded product obtained therewith. The present invention furthermore relates to methods for producing a starting material for a foamed moulded product and the starting material obtained therewith. The present invention moreover relates to methods for producing a foamed moulded product and the moulded product obtained therewith. The present invention also relates to applications of these products.

Abstract: The invention provides a method of manufacturing a polymeric implantable medical device using gel extrusion of high molecular weight polymers or charge-induced orientation to avoid heat degradation of the polymer that might occur during conventional heat extrusion.

Abstract: A process for extruding a thin positive electrode sheet having at least 40%/wt of solid content for a lithium polymer battery through a single or twin screw extruder is disclosed as well as a positive electrode sheet produced therefrom. A mixture of active cathodic intercalation material, lithium salt and electronic conductive material is mixed with a polymer of the polyether family in a ratio of at least 40% of total weight into the mixing chamber of an extrusion machine and extruded through a classical sheet die into a thin cathode sheet or film onto a substrate in sheet form.

Abstract: A method for producing an environment protective foamed thermoplastic resin polymer comprises using an extruder with a helical rod to be driven to rotate. The extruder has a feeding section, a melting section, a mixing section and a heating-shaping section formed therein. The method includes a plurality of steps, in which thermoplastic resin is heated, melted in the melting section and moved into the mixing section, and hollow expansion balls are fed into the extruder to be evenly mixed with the melted thermoplastic resin. Then the hollow expansion balls are slightly heated and inflated, and moved into the heating-shaping section, and then the balls are heated at foaming temperature, foamed and inflated. After being injected through a nozzle, the melted thermoplastic resin and the hollow balls become a foamed thermoplastic resin polymer with a preset thickness and shape.

Abstract: A high cerium-containing dehydrogenation catalyst of alkyl aromatic compounds used in industrial scale, including iron oxide and potassium oxide, having improved physical strength of catalyst pellets, and a method for producing the catalyst, and the dehydrogenation method using the catalyst are disclosed. In producing high cerium-containing pellets by using a dehydrogenation catalyst including iron oxide and potassium oxide, cerium carbonate hydroxide or a mixture of cerium carbonate hydroxide and other cerium compounds is used as a cerium source to produce catalytic pellets having improved physical strength.

Abstract: A method for making a fiber-reinforced thermoplastic polymer composition and forming a fabricated article therefrom. A thermoplastic polymer, a masterbatch comprising an elastomer and a reinforcing fiber material are compounded, extruded and immediately formed into a fabricated article. The fabricated article is formed by compression molding, vacuum forming, thermoforming, injection molding, blow molding, profile extrusion or combinations thereof.

Abstract: The present invention relates to polymeric articles that are colored using an unformulated heat stable black, blue or violet dye during melt processing, for example a melt spinning process. The process eliminates the need for acid bath dyeing of high melt polymeric materials. The polymeric articles are for example polyester or polyamide.

Abstract: A process for producing a cycloolefin resin composition comprising a cycloolefin resin and an additive by using a twin-screw extruder is provided, in which loss of the additive caused by volatilization through a vent during kneading is reduced and kneading of resin material with the additive can be sufficiently carried out. When the cycloolefin resin and the additive are kneaded by using a vented twin-screw extruder (10) to produce the cycloolefin resin composition containing the additive, an additive introduction opening (3) is disposed downstream of a vent (2) located nearest to a discharge opening (13) of the twin-screw extruder, and the additive is charged through the additive introduction opening located at a distance from the discharge opening of the twin-screw extruder in the range between longer than 10D and not longer than 30D.

Abstract: An extrusion process for manufacturing powder coating compositions is disclosed. The process generally includes a shear mixing step done at ambient temperature and a focused heating step in which the shear mix is heated to a higher temperature for a shorter time than in conventional methods. The focused heating provides for a shorter heat history, resulting in enhanced coating properties. The mixture may be cooled before it leaves the extruder.

Abstract: A method and device for the production of thermoplastics containing coarse-scale and/or nanoscale, coated, de-agglomerated magnesium hydroxide particles that are supplied to the thermoplastic in the form of a dispersion or suspension in an aqueous or organic solvent, and mixed with the themoplastic. The thermoplastics filled with magnesium hydroxide particles demonstrate improved mechanical properties, particularly an improved modulus of elasticity and low brittleness.

Abstract: In an exemplary embodiment, the present method includes the stops of providing a polymer resin to be processed: blending particulate boron nitride (BN) and a fluorine-containing polymer with said polymer resin to provide a resin blend: heating said resin blend to obtain a desired flowability value: and processing said resin blend into a desired shape.