Of filament

An improved process and apparatus for production of synthetic multifilamentary yarns having uniform quality. The method comprises extruding a molten synthetic polymer downwardly through a spinneret, advancing the extruded filaments downwardly through a substantially stationary column of heated air, and...     

An improved process for the manufacture of virtually bubble-free monofilaments of polyhexamethylene adipamide and having a thickness of more than 0.5 mm, wherein polyhexamethylene adipamide containing from 0.05 to 2% by weight of polystyrene finely dispersed therein is passed in the molten state through...     

An oriented high density polyethylene polymer material having a weight average molecular weight of less than 200,000, a number average molecular weight of less than 20,000, a ratio of weight average molecular weight M.sub.w to number average molecular weight M.sub.n such that for M.sub.n > 10.sup.4,...     

A method and apparatus are disclosed for the production of a novel industrial polyester filament yarn of improved uniformity wherein a plurality of filaments are melt-spun into a heated zone coupled with controlled cooling. The yarn produced has improved long and short term Uster uniformity and improved...     

Polyhexamethylene adipamide feed yarn for false-twist texturing by combined draw-texturing processes is prepared by high-speed spinning under controlled conditions to have improved stability, low shrinkage, good tenacity and uniformity. The feed yarn has break elongation and birefringence values particularly...     

An artificial hair consisting essentially of a monofilament having a corollaceous cross-section, and a root formed at one end of the monofilament having a corollaceous cross-section larger than that of the monofilament proper.

Apparatus and process for intermingling a synthetic continuous filament multifilament yarn at substantially any point on a synthetic filament yarn threadline by subjecting the yarn to simultaneous action of two opposed fluid jets which are radial and perpendicular to the yarn threadline. The apparatus...     

An improved process is provided for producing cigarette filters comprised of a substantially open-cell foamed thermoplastic polypropylene resin wherein a mixture comprising a thermoplastic polypropylene resin, a volatile blowing agent and a nucleating agent is extruded through a die to produce a strand...     

Naphthalate polyester filaments, yarns or fibers consisting essentially of a naphthalate polyester which has an intrinsic viscosity of 0.3 to 3.5 and a softening point of at least 200.degree. C, and in which at least 85 mol% of the total recurring units consist of units of the formula ##STR1## wherein...     

Air-jet textured core/effect nylon yarn provides fabrics having better cover when the core component has been draw-oriented after conventional melt-spinning, and the effect component has been spin-oriented by melt-spinning at unusually high speed. The improved yarn is particularly useful in upholstery...     

A method for producing polyester fibers having excellent dyeability with basic dyes or disperse dyes, which comprises melt-spinning a polyester comprising predominantly (at least 80% by mol) repeating units of ethylene terephthalate and containing 0.5% by mol or more, preferably 1.5 to 5% by mol of an...     

Textile filaments are melt-spun, formed into a yarn, heated, cooled and false twisted while being simultaneously drawn, the upstream propagation of twist from the false twist device being arrested at the entry to the heater and the draw point of the yarn being stabilized on the heater. The twist arresting...     

Poly (ethylene oxide) monofilaments together with their preparation and use are disclosed. The monofilaments are characterized in part by their properties which are useful for weaving or sewing and by their solubility in a wide variety of solvents including water at room temperatures. The monofilaments...     

Synthetic filament is produced by spinning from the melt of an acrylonitrile-containing polymer, such filaments having high tenacity without the need for after-stretching.

Polyamide yarn is melt spun at high speed and drawn almost immediately (between 0.002 and 0.25 seconds) after solidification. Turbine driven feed roll replaces conventional feed and separator roll. Process displays unusually low drawing tension, exceptionally uniform yarn.

Tissue absorbable synthetic polymeric fibers, such as polyglycolic acid, are felted to form a thin mat with at least one, and preferably both, surfaces compacted by contact with a heated embossing surface such as a hot roller. Porosity is reduced but the compacted felt retains its flexibility, and conforms...     

Poly(ethylene terephthalate) filaments of enhanced dyeability, low boil-off shrinkage (even in as-spun condition), good thermal stability over a large temperature range, and useful as texturing feed yarns and/or as hard yarns requiring no further drawing are prepared by spinning at extremely high speeds,...     

A textured melt-spun filament having alternate S-twisted and Z-twisted helical sections connected by twist reversal regions, the filament having a cross-section comprising a spiral wherein the outer portion of the spiral lies at the inside of the helical sections.

A method of extruding multi-filament polypropylene yarn in which the polypropylene is extruded at a temperature below 425.degree. F., such as in the range 415.degree. F. to 350.degree. F., particularly about 400.degree. F., into a hot zone having a temperature sufficiently high to retard cooling of the...     

This invention relates to a method of producing a high polymer composition for use in the manufacture of textiles which consist of an admixture of polyacrylonitrile and an aromatic polyamide.

A mineral fiber-forming bushing is disclosed in which sidewalls containing at least one opening extend continuously downwardly from the bushing bottom wall to define a forming chamber beneath the bushing. A fluid is directed toward the bushing bottom wall and the exit of the fluid through the opening...     

Disclosed is a polyamide multifilament yarn comprising a plurality of polycapramide multifilaments and having a high softness, a mild touch, a level-dyeing property and an excellent colorfastness to washing and laundering. The individual filaments in this yarn are characterized by a birefringence of...     

A spin-texture process for producing crimped synthetic filaments is described in which freshly extruded filaments are passed over a 20.degree. C.-180.degree. C. roll before they are completely solidified and fully drawn as they leave the roll. In the case of polyamide filaments, spontaneous crimp as...     

A low shrinkage, dimensionally stable, polyester industrial fiber is produced by a process which involves conditions of continuously spinning and drawing filaments wherein the filaments are passed through a steam impinging draw point localizing jet (25) at a temperature of about 460.degree. C. to 580.degree....     

By blocking part of a spinnerette orifice with a wire strand desirable cross-sectional shaped fibers of acrylonitrile polymer are obtained.

Oriented polymer material of high Young's modulus and low creep strain is provided by a process which comprises drawing polymer material having a weight average molecular weight greater than 300,000 and a ratio of weight average molecular weight to number average molecular weight greater than 5 at temperatures...     

Process and apparatus are provided for producing filaments comprising: supplying a plurality of streams of molten material; attenuating said streams of material into continuous filaments through the action of a stream of fluid moving from an attenuation means; said filaments being entrained in said fluid...     

Method and apparatus for forming filaments are provided by centrifugally forming a veil of primary fibers or streams of material and moving a fluid along a path within the veil at a velocity sufficient to attenuate said primary fibers into filaments.

Method and apparatus are provided for forming filaments comprising: means for supplying a plurality of streams of molten material; attenuation means for supplying of moving fluid to attenuate said streams into said filaments; said filaments being entrained in said fluid moving from said attenuation means;...     

Polyimide fibers which have a porous, microcellular structure. Methods of making such fibers from a precursor under conditions which cause the precursor to foam and undergo imidization.

Apparatus for fluidically attenuating streams of molten material into filaments is provided comprising; a base having a first chamber and a recess separated by a wall having a plurality of apertures therethrough, said first chamber being adapted to receive a fluid; a first member having a first arcuate...     

A process is provided for preparing self-crimpable monocomponent fibers by the sequential steps of melt-spinning a polymer of polyhexamethylene adipamide or polycaproamide into filaments, quenching the filaments by a cross-flow of air to an average surface temperature of about 40.degree. to 130.degree....     

A spinnerette assembly wherein tapered passageways and distribution chambers of diminishing length are so arranged as to provide equal back pressure over all orifices thereby providing extrudates of improved uniformity of diameter after stretching.

An improved method and apparatus for forming nonwoven webs by spinning filaments into a quench chamber where they are contacted with a quenching fluid, then utilizing the quench fluid to draw the filaments through a two-dimensional nozzle spanning the full machine width, and collecting the filaments...     

A method of extruding polypropylene filaments in which the polypropylene is extruded at a temperature below 375.degree. F., such as in the range 335.degree. F. to 365.degree. F., particularly about 350.degree. F., into a quiescent hot zone having a temperature sufficiently high to retard cooling of the...     

A low shrinkage, dimensionally stable, polyester fiber is produced by a process which involves conditions of continuously spinning and drawing filaments wherein the filaments are passed through a steam impinging draw point localizing jet (25) at a temperature of about 482.degree. C. to 580.degree. C....     

Method and apparatus for forming filaments are provided by centrifugally forming a veil of primary fibers or streams of material and moving a fluid along a path within the veil at a velocity sufficient to attenuate said primary fibers into filaments.

An equilibrium melt from a standard hydrolytic or anionic polymerization of caprolactam is spun at a temperature between about 230.degree. and 270.degree. C. through a spinnerette, preferably one having a multiplicity of holes spaced from each other in an asymmetric arrangement, the spinning take-away...     

Disclosed is a method of making a thick-and-thin fiber or fibers, wherein the fineness thereof changes gradually and periodically along the longitudinal direction thereof. The method comprises (1) a step wherein molten fiber forming polymer is extruded through spinneret holes at a constant throughput,...     

A deep-dyeable polyester fiber of soft hand comprising recurring units consisting mainly of ethylene terephthalate and --SO.sub.3 M groups in which M is an alkali metal, and having a degree of crystallinity .chi..sub..rho. of from 30 to 55%, a degree of orientation .DELTA.n of from 0.06 to 0.12 and .chi..sub..rho....     

By adjusting the viscosity of the spinning solution, low molecular weight polymers of acrylonitrile can be spun to provide useful fiber having an unexpected higher dye color yield than fiber prepared from the corresponding polymer of higher molecular weight.

A process of melt spinning a fibre-forming polymer particularly polyethylene terephthalate or poly-hexamethylene adipamide at a minimum wind up speed of 1000 meters per minute in which there is added to the fibre-forming polymer before spinning a small proportion of a polymer capable of forming an anisotropic...     

A process of melt spinning polypropylene the improvement comprising adding to the polypropylene before it is melt spun, a small proportion of a polymer capable of forming an anisotropic melt in the temperature range at which the polypropylene may be melt spun and then melt spinning the polymers together...     

Improved synthetic spun fibers are disclosed. The fibers have improved properties, especially with respect to the strength-elongation properties, the texturability by means of friction units or gas jet turbulence and the subsequent treatability of the fibers without the interpolation of a separate stretching...     

In producing nylon yarns having latent crimp by the process disclosed in U.S. Pat. No. 4,202,854, the polymer throughput (i.e. extrusion rate) is increased without sacrificing the amount of uniformity of the bulk resulting from development of the latent crimp by adding a nucleating agent, such as calcium...     

In a dry-spinneret wet-spinning process for the preparation of para-aramid filaments by spinning from sulfuric acid solution, filament tenacity and modulus are increased when the tension is applied to the freshly spun, wet filaments when they contain less than 50% sulfuric acid.

In order to produce random changes in texture of pile fabrics, continuous multifilament bulked yarn is treated to detexturize spaced portions along its length.

A process for producing polyester fiber highly suitable for a raw yarn for a woven or knitted fabric, having a residual elongation of not higher than 60%, a Young's modulus of 60 to 100 g/d, a boiling water shrinkage of 4 to 10% and a dry heat shrinkage of 5 to 12%, the peak stress temperature in a dry...     

A process for the spinning of synthetic fibers comprising dissolving at least one polycondensation product of at least one polyfunctional phenol component with the phenolic groups attached to a central carbon atom so they are hindered in their free rotation and at least one polyfunctional carboxylic...     

A molten polymer containing a blowing agent and, usually, a nucleating agent, is spun into fibers with screen packs or equivalent structures upstream of the spinning apertures. The use of screen packs enables the production of fibers with finer bubbles, which are therefore susceptable to greater melt-drawdown...     

Process for draw-fracturing yarn the continuous filaments of which each have a cross-section comprising a body section and one or more wing members joined to the body section, the one or more wing members varying up to about twice their minimum thickness along their width, at the junction of the body...     

A method of producing abrasive fibers is disclosed, which comprises providing a conjugate fiber comprising at least one abrasive layer containing abrasive particles and at least one coating layer substantially covering the abrasive layer, and removing at least a part of the coating layer from the conjugate...     

An extrusion drawn elongated thread-like filament comprising a minor proportion of elongated metal fibers embedded in a major proportion of thermoplastic polymer wherein the melting temperature of said metal is within the softening to molten range of said polymer and wherein said metal fiber is unidirectional...     

Cospun yarn essentially free of mechanical defects comprising from about 30 to about 70 weight percent of poly(ethylene terepthalate) filaments containing a basic dye sensitizing unit and the remainder of the filaments being copolyamide filaments of hexamethylene adipamide and small amounts of carpoamide.

A product and method for obtaining a radiation-resistant polyolefin-containing product, by handling and processing the corresponding homopolymer or copolymer melt and resulting extrudate in a manner favoring retention of a high smectic and less than about 20 wt % monoclinic configuration.

Polyamide conjugate filaments are prepared by a spin-stretch process wherein two nylon 66 polymers having different relative viscosities are melt spun at a spinning speed of at least 2286 mpm to form filaments in which the polymers are arranged in a side-by-side configuration along the length of the...     

Nonwoven webs are disclosed which comprise monofilaments or fibers of a thermoplastic material. Basically, the improvement comprises the use of monofilaments or fibers which have a bilobal shaped cross-section. Nonwoven webs made according to this invention are particularly suited to be used for liners...     

A high tenacity polyhexamethylene adipamide fiber having: (1) a formic acid relative viscosity of 70 or more than 70; (2) a tenacity of at least 10 g/d; and (3) a coefficient of stability of tie molecule of at most 0.20.

A method of making a filamentary structure comprising a spiral thermoplastic core filament disposed within a thermoplastic sheath component is provided. The method involves extruding together from an extrusion die filaments forming the core filament and the sheath component, with the core filament being...     

A method is disclosed for melt spinning man-made filaments, and wherein the filaments are formed into yarn components which are subsequently combined to form a composite yarn. The method and apparatus include provision for selectively modifying the physical properties of the yarn components, so that...     

Hydroxyethylated polybenzimidazole fibers are produced by a wet jet/wet spinning or by a dry jet/wet spinning process. A spinning solution of hydroxyethylated polybenzimidazole is extruded vertically downward through a spinneret into a liquid coagulation bath. The resulting fibers have pore sizes ranging...     

A spinning solution of an acrylonitrile polymer is subjected to dry-wet spinning through an annular type spinneret having a non-perforated part, i.e. a part not formed with spinning orifices, extending from the outer periphery to the inner periphery. The spinneret has more than 3,000 spinning orifices,...     

A process for producing a non-woven web of thermoplastic polymer fibers comprises extruding a thermoplastic polymer through a series of die openings while passing a stream of hot gas from both sides of the die openings to impinge and attenuate the molten extruded resin fibers, wherein the gas is passed...     

Modifying a polyester with tetraethyl silicate (or like oxysilicon chain-brancher) to provide a draw-texturing feed yarn that can be draw-textured at a speed of 1,000 mpm without excessive filament breaks, and with other advantages in the resulting textured yarns, such as improved bulk and dyeability...     

Machined steel blocks 1 and 2 have ridges 20 facing valleys in the opposite block. Polypropylene tape 3 to be heat-treated has sliding contact transversely over each ridge on each block. The blocks are heated by heaters 4. The gap between the blocks is adjustable to suit the material being processed....     

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...     

Continuous polypropylene multifilament yarns are made by melt spinning and stretching in an integral process; a sufficient number of filaments for forming at least 8 continuous filament yarns each consisting of at least 10 filaments are melt spun through a spinneret (11) at a speed of at least 400 m/min...     

Polypropylene surgical monofilaments sutures of improved compliance are made by drawing polypropylene monofilament to a greater extent than its natural draw ratio, followed by annealing with shrinkage.

Process for producing polyester fibers of high tenacity and high modulus, by melt-spinning a polyester having an intrinsic viscosity of not lower than 0.3, to obtain extruded filaments of low orientation having a birefringence not higher than 10.0.times.10.sup.-3, post-polymerizing the filaments in a...     

An improved process comprising flame treating monofilaments from which a preferred product is a heavy denier transparent polyamide monofilament, especially suitable as fishing line.

A process for producing polyester fibers having excellent tensile properties, particularly suitable as reinforcement material for tires, belts, etc., involves melt-spinning an ethylene terephthalate polyester to form highly oriented low crystalline polyester filaments which, at the state of being taken-up...     

Process for producing spin-finish-free man-made fibers by melt spinning high polymers having a glass transition temperature of above 100.degree. C. and subsequently drawing the filaments by means of preheater godets to a preset draw ratio, wherein the filaments are not spin-finished prior to drawing...     

The invention relates to a process for the treatment of surfaces of highly oriented polyolefin objects, obtained by converting a solution or melt of a linear polyolefin with a weight average molecular weight of at least 400.000 g/mol, at a temperature above the dissolution temperature, respectively above...     

Modifying a polyester with tetraethyl silicate or like oxysilicon chain-brancher to provide a draw-texturing feed yarn that can be draw-textured at a speed of at least 500 mpm without excessive filament breaks, and with other advantages in the resulting textured yarns, such as improved bulk and dyeability...     

This invention discloses a process for producing a high modulus, high tenacity polyethylene terephthalate filament which comprises (1) spinning a solution of polyethylene terephthalate in an organic solvent through a die to produce a solution spun filament, wherein the polyethylene terephthalate has...     

A yarn comprising polyester fibers having an improved balance of properties (tenacity and boiling water shrinkage) is produced within predetermined limits. The polyester yarn is prepared by cold drawing a partially oriented feeder yarn, partially annealing the drawn yarn, and subsequently annealing the...     

A process for preparing high modulus, high tenacity fibers of aromatic polyamide wherein a first constant tension within 40-95% of the fiber breaking load is applied to washed fibers at a temperature of less than 50.degree. C. for a duration of greater than 5 seconds, and drying the fibers at a second...     

A process for simultaneously drying and heat treating wet spun fibers of greater than 20 percent water based on weight of dry fiber material supplied continuously in multiple wraps around a pair of rolls in a heated zone, at a tension of 0.2 to 6 grams per denier at the beginning of the zone, with gas...     

An oriented elastomeric filament spun from a thermoplastic elastomeric material selected from the group consisting of a block copolymer of polybutylene terephthalate and polytetramethylene glycol, a block copolymer of polybutylene terephthalate/polybutylene isophthalate and polyethylene glycol/polypropylene...     

Melt-spun polyester fibers are taken up in the absence of heat at a speed of 5,000 to 6,000 m/min under conditions that satisfy the following relations (IX) and (X), subsequently heat-treating the fibers for a period of from 0.01 to 0.05 seconds with a heating roller while the length of the melt-spun...     

A process is disclosed for preparing high tenacity, high modulus, para-aramid fibers by application of cyclic tensioning forces to such fibers in the newly-spun, wet, state before they have been dried.

Modifying a polyester with special chain-brancher residues in carefully controlled amounts to provide a draw-texturing feed yarn that can be draw-textured at a speed of 1,000 mpm without excessive filament breaks, and with other advantages in the resulting textured yarns, such as improved bulk and dyeability...     

Industrial yarn is used as a reinforcement in a wide variety of manufactured articles, such as conveyor belts, drive belts, V-belts, seat belts, hoses, tires, and the like. It is often important for the industrial yarn to have high tenacity, high modulus and dimensional stability. The present invention...     

A method of forming an optical fiber defining an axis, the fiber having a dipolar dopant wherein a substantial number of the dipoles of the dopant are oriented in essentially the same direction along the axis of the fiber; the method comprising the steps of providing a vessel having a spinneret, establishing...     

A continuous spin-draw process of making dimensionally stable polyester fiber having high strength and low shrinkage by melt spinning polyethylene terephthalate and drawing comprising multiple drawing stages of at least two stages where the spun yarn is passed from the takeup roller to a first pair of...     

A process for improving the properties of fibers of a copolymer of ethylene terephthalate/hexahydroterephthlate units with a high proportion of hexahydroterephthalate units by a 2-stage drawing, crimping, relaxing process to provide stretchy filaments of high elongation accompanied by low shrinkage.

Continuous polypropylene multifilament yarns are made by melt spinning and stretching in an integral process; a sufficient number of filaments for forming at least 8 continuous filament yarns each consisting of at least 10 filaments are melt spun through a spinneret (11) at a speed of at least 400 m/min...     

A vinyl floor covering to accommodate wood subfloor contraction and expansion as well as rolling load incorporates a foamed plastisol encapsulated glass mat which may be cut to form pivot points and expanded under a controlled pre-stressed condition. The glass mat serves as a carrier during maufacture...     

Maleic anhydride-grafted HDPE fibers are disclosed. The processing of LLDPE and fibers is enhanced by including HDPE or LLDPE which has been grafted with maleic anhydride to obtain succinic acid or anhydride groups along the linear polyethylene chain in the fiber feed stock. The fibers are formed by...     

Deep-dyeing conjugate filaments are melt-spun by merging molten sub-streams of incompatible polymers to form combined streams, then quenching the combined streams to form the conjugate filaments. The filaments are preferably cold drawn prior to winding, increasing the bulk level in a fabric containing...     

Improved polymeric membranes and their method of manufacture are disclosed. The improved membranes are produced by increasing the draw ratio employed during the manufacture of the membrane. The membranes show at least substantially constant or increased selectivity and mechanical properties as the draw...     

Extrudable blends of polypropylene and polyethylene, especially LLDPE, are prepared in a dynamic mixer and extruded as novel biconstituent fibers comprising polypropylene as one phase and polyethylene as another phase. Improved tenacity and hand are obtained, as compared to polypropylene alone.

A process for making fibers of para-aramid and poly(vinyl pyrrolidone) (PVP) comprising agitating a mixture of solvent acid, para-aramid, and PVP, heating the mixture to form a solution, extruding the solution, drawing the extruded solution, passing the stretched solution through an aqueous coagulating...     

Incorporating a minor amount of a hydrogen bonding additive such as nylon 6 monomer or 2-methyl-pentamethylene adipamide monomer in a nylon 66 high RV polymer for making nylon 66 POY provides unexpected downstream advantages over homopolymer nylon 66 POY, especially in draw-texturing to make bulky yarns...     

Draw breaks are reduced in the spinning and drawing of certain pigmented nylon filaments by incorporating at least 5% of polycaproamide in the melt shortly before spinning.

A process for the preparation of an oriented homo- or co-polyalkene material of improved strain rate sensitivity, which process comprises subjecting the oriented homo- or co-polyalkene material having a weight average molecular weight (M.sub.w).ltoreq.350,000, a number average molecular weight (M.sub.n).gtoreq.5,000,...     

Polypeptide fibers, fiber spinnable solutions, and a process for forming polypeptide fibers are disclosed. The invention includes forming polypeptide fibers from spinning solutions containing a polypeptide, and a solvent selected from the group consisting of hexafluoroisopropanol, and a mixture of formic...     

The adhesion of polyolefin objects, in particular highly oriented polyethylene filaments, to, for instance, polar matrices is improved by oxidizing the surface of the objects and then treating it with a solution of a silane compound, a titanate or a chromium complex.

A process for the melt spinning of a fibre forming polymer into a filamentary yarn in which the spinning threadline is passed through a heated shroud located immediately below the spinneret, the threadline is cooled by an air current and then taken up at a speed of 5 km/min or more the improvement being...     

A vinyl floor covering to accommodate wood subfloor contraction and expansion as well as rolling load incorporates a foamed plastisol encapsulated glass mat which may be cut to form pivot points and expanded under a controlled pre-stressed condition. The glass mat serves as a carrier during manufacture...