Abstract: An apparatus for melt spinning and winding up synthetic yarns comprising a spinning appliance, a treating appliance and a windup machine. The treating appliance comprises a runoff godet for guiding the yarns before entry and distribution of the yarns into a plurality of winding stations in the windup machine, the runoff godet being arranged above the windup machine and guiding the yarns in a parallel side by side arrangement on its circumference. The runoff godet is arranged transversely to a winding spindle and above the windup machine, the windup machine comprising a plurality of head yarn guides which are disposed upstream of the winding stations and are arranged in a vertically oriented runup plane.

Abstract: A dope is prepared from TAC, solvent and the like. The dope is cast from a casting die (31) onto a belt (34) to form a casting film (69). The casting film (69) is peeled as a wet film (74) from the belt (34). The wet film (74) is transported to a tenter device (35), in which both side edge portions are clipped by tenter clips (100). The content of the remaining solvent in the wet film 74 is determined to 100 wt. % on dry basis. The tenter clips (100) (temperature, 40° C.) has a support surface (100a) for supporting the side edge portion of the wet film 74 thereon. A surface tension of the support surface (100a) is 3.1×10?2 N/m, a surface roughness Ra of the support surface (100a) is 0.3 ?m, and a surface hardness of the holding surface (100a) is 700 Hv. Therefore, the adhesion of the foreign materials is reduced. The wet film (74) is dried with stretching in the widthwise direction by the tenter device (35), so as to obtain a TAC film (82).

Abstract: An apparatus for making a spunbond web has a deposition surface, a spinneret above the surface for producing filaments that move downward along a path toward the surface, and a cooling chamber below the spinneret. Cool process air is supplied to the chamber to cool the filaments as they pass downward through the chamber. A laterally closed stretching unit downstream of the cooling chamber has laterally closed side walls that have portions that diverges downward. A connecting region between the stretching unit and the cooling chamber substantially excludes access of air from outside to the filaments as they pass from the cooling chamber to the stretching unit so that the filaments drop from the stretching unit onto the deposition surface.

Abstract: A preform (15) is hung from an arm (72) into a heating furnace (74). The heating furnace (74) has five heater units (90-94). A gas supply device (77) supplies nitrogen gas to the heating furnace (74). The heating furnace (74) is divided into five sections by orifices (95-100), and the temperature of each divided section is controlled by the heater units (90-94) provided in each section. A seal member (106) attached to the top side of the heating furnace (74) shields the heating furnace (74) from external air, so it is possible to prevent turbulence in the divided sections in the heating furnace (74).

Abstract: A turning bar draw-off device for a tubular film extrusion installation, with a plurality of turning bars which can be rotatingly driven around a common axis of rotation or in reverse by rotary drive mechanisms. For the rotating or reversing guidance of the turning bars around the axis of rotation, the ends of each turning bar are connected with guide carriages, which are guided on guide rails arranged in a circle.

Abstract: Device and method for preparing filament yarn of composite nanofibers. The device includes pairs of electrospinning nozzles on a frame and filament guiding roller pair under the frame. The spouts of each pair of nozzles are oppositely facing. The method includes feeding polymer solutions to the pairs of nozzles, applying high DC voltage with opposite polarity respectively to each one of the pairs of nozzles, forming composite nanofibers by attracting nanofibers with opposite charge from each nozzle and striking together of the charged nanofibers, pulling/stretching the composite nanofibers to form filament yarn of composite nanofibers, drawing down the filament yarn of composite nanofibers from the first pair of nozzles and using it as a carrier to receive the nanofibers with opposite charge electrospun from the second pair of nozzles and coated by the same so as to form multi-layer (e.g., two- or more-layer) filament yarn of composite nanofibers.

Abstract: The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the molten polymer in the cooling device to form a film sheet (3); slitting the initial film sheet into a plurality of relatively narrow slit film tapes (4); stretching (8) at elevated temperature, by passing the slit film tapes through a heating medium (7) at a temperature just below the softening temperature of the slit film tapes; y annealing and cooling the oriented slit film tapes (10, 11); winding the slit film tapes (13); characterized in that before the stretching step, it has a stage of pre-stretching (108) made by passing the slit film tapes through one set of heated holding rollers (107) turning at a given speed and one set of cooled pre-stretch rollers (109) turning faster than the heated holding rollers, wherein at least one of the rollers of the set of holding rollers is heated and at least one of the roller

Abstract: Systems and methods for manufacturing synthetic yarns for synthetic turf. The systems and methods include rollers for advancing a plastic sheet forward through a manufacturing process. The plastic sheet is cooled and heated on opposing sides by alternating temperature rollers to pre-form the plastic sheet such that subsequent synthetic yarns made from the sheet will have a curled shape. The plastic sheet is then cut longitudinally by a plurality of slitting blades along the length of the sheet to form a plurality of single strand synthetic yarns. A drawing device then draws and stretches the single strand synthetic yarns to a desired width and thickness, wherein the drawing device includes a drawing oven for heating the yarns, and a plurality of drawing rollers for pulling and stretching the heated yarns. The final product drawn yarns comprise sealed, smooth yarns with desirable rounded edges and a curled tip.

Abstract: A strand shaping part for connecting an extruder (1) to a granulating system has a number of supply channels (8) that can be flow-connected to the outlet (5) of the extruder (1). These supply channels lead to gear pumps (21) which have a delivery behaviour that is as constant as possible and with which the flow of melt to channels (11) can be blocked during start up. A single channel (11) leads from each gear pump (21) to a strand die (9) that can be formed by holes of a perforated plate (10) which is connected to a perforated plate head (7). Several gear pumps (21) are driven by a common shaft (24). The method for starting a granulating system provided with a strand shaping part of the aforementioned type provides that the extruder (1) is first started until a sufficient pressure is built up at the inlet (27) of each gear pump (21). Once this pressure is reached, each gear pump (21) is started again. In an underwater granulating system, the granulating blades (12) are rotationally driven last (FIG. 1).

Abstract: A device and method for producing a spun-bonded non-woven. A molten polymer supplied to a spinning beam from a melt source is extruded through a multiplicity of linearly arranged spinneret bores into filaments arranged in the form of a curtain. A tensile force is exerted on the filaments by means of a draw-off nozzle. The filaments are thereupon deposited on to a conveyer belt where they form a spun-bonded non-woven. At the draw-off nozzle, a monitoring means is provided which detects a characteristic quantity characteristic of the process. One or more structure-borne sound sensors are preferably used as monitoring means. The measurement result of the monitoring means, after a desired value comparison, is supplied to a signal means or is used for regulating the process.

Abstract: In a device and a method for manufacturing wrapped tubes by helically winding up a thermoplastic, preferably strip-shaped plastic profile (2) onto a winding core (1) in an overlapping manner, where a plasticizing aggregate supplies the plastic profile (2) via a profile nozzle (4), it is provided that the plasticizing aggregate is a kneading means (3) supplying a thermoplastic plastic mixed with reinforcing fibers to the winding core (1) via the profile nozzle (4).

Abstract: Method and apparatus for producing chopped rock fibers, such as basalt. A furnace is preferably used to melt rocks, and a drawing assembly is used to draw the melted rocks into fibers. Prior to chopping the fibers to selected lengths, a preconditioning assembly operates to induce mechanical defects in the drawn fibers. Preferably, the preconditioning assembly comprises a shock cooling stage and/or a fiber twisting stage. The shock cooling stage significantly reduces the temperature of the drawn fibers, such as by the application of a stream of fluid such as water or steam to the drawn fibers. Additionally or alternatively, the shock cooling stage preferably comprises a liquid coolant bath through which the drawn fibers pass. The fiber twisting stage preferably utilizes a twisting assembly such as a roller to induce a torsional force upon the drawn fibers to continuously twist the fibers about an axis thereof.

Abstract: In a method and apparatus for producing polystyrene tubular shrink film via film blow molding, a polystyrene plastic material is extruded into a circular tubular film, which is cooled and then uniformly heated in a special hot water tank to become softened. Hot air is then blown into the softened tubular film, and two sequentially arranged speed-controlled pressure guide roller sets are set to two different operating speeds, so that the softened tubular film is transversely and longitudinally stretched and thinned to form a stretched tubular film, which is then passed through a setting treatment system to form a thermally set tubular film and be finally wound in a take-up system into a roll for storage. The method and apparatus is simple, low cost, and easy to operate, and the product thereof is environment friendly to help in economic development.

Abstract: To provide a method including processing electrophotographic toner constituent material to a fibrous fine precursor and pulverizing and cutting it to obtain a uniform fibrous toner with energy efficiency in an apparatus for producing electrophotographic toner including a nozzle unit containing a nozzle having a flow path tapering toward the nozzle hole at 2° to 20° and a gas nozzle unit containing a gas nozzle and gas flow path tapering toward the nozzle hole at 15° to 33° relative to a direction of a nozzle axis, wherein the toner constituent material containing a raw material A containing a resin and pigment, and a raw material B containing one of a low melting point resin, wax and organic solvent, is extruded from the nozzle at 150° C. to 320° C., and drawn by gas flow from the gas nozzles so as to be a fibrous fluid while controlling the flow rate.

Abstract: The present invention comprises a rotary drive nozzle die machine for use with at least first and second dough extruders. The machine includes at least one rotatable nozzle having at least two openings for extruding at least two strands of dough therethrough, a first compression head for directing a first flow of a first type of dough under pressure from the first extruder toward the at least one rotatable nozzle and a second compression head for directing a second flow of a second type of dough under pressure from the second extruder toward the at least one rotatable nozzle.

Abstract: An apparatus for spinning and winding a plurality of synthetic filament yarns, and which includes a spinning device, a withdrawal godet downstream of the spinning device, and a takeup device which has a plurality of winding positions that are distributed along a longitudinal axis. In the spinning device, a plurality of spinnerets are arranged in side-by-side relationship, each for spinning one yarn, and in the takeup device, each yarn is wound to a package at one of the winding positions. To provide a device that is compact and operator friendly, the spinning device and withdrawal godet are oriented in a transverse relationship with the longitudinal axis of the takeup device, and they are arranged in the region of the front end of the takeup device. With that, the distribution of the yarns from the spinning device to the winding positions can be readily accomplished.

Abstract: Equipment that lays flat films or tubular films extruded by a blown film extrusion installation has at least one roller, which guides the walls of the film or the tubular film. The lay-flat equipment has at least one device that influences the rotational speed of the roller by providing a torque that can be transferred onto the roller by a transfer device. The transfer device provides for slippage between the roller and the device that provides the torque, thereby ensuring a smooth transfer of torque and preventing damage to the film.

Abstract: An assembly for use in continuously forming a plurality of lengths of flexible noise attenuating cutting line for use in rotary vegetation trimmers. The assembly includes a breaker plate having a conically shaped inner portion and a planar outer portion. A plurality of extrusion dies are disposed in the outer portion wherein each die defines a die hold configuration at its lower end for the extrusion of one or more monofilament polymer strands therethrough, and a drive assembly is provided for rotating each of the dies at a predetermined speed such that upon directing a flow of molten monofilament polymer material onto the breaker plate, the material is directed from the inclined central portion onto the planar outer portion where it is extruded through the rotating dies to create a plurality of twisted strands of polymer material that upon cooling, stretching and heating, define lengths of flexible noise attenuating cutting line.

Abstract: The present invention relates to a method and an apparatus for extruding continuously molded bodies, wherein an extrusion solution, in particular an extrusion solution containing water, cellulose and a tertiary amine oxide, is extruded through an extrusion orifice into a continuously molded body and is then deflected by means of a deflector (7). To improve the quality of the continuously molded bodies produced by the method or apparatus of the invention, the extrusion orifices are arranged in a row such that the individual, continuously molded bodies exit in the form of a curtain (3) form the extrusion head. This curtain is then deflected by the deflector.

Abstract: An apparatus for producing and winding synthetic multifilament yarns, which has a spin unit 1 for melt spinning the yarns, at least one treatment unit 7 for treating the yarns, and a takeup unit 16 with a plurality of winding positions for winding the yarns. The winding positions 17.1-17.3 are distributed along a horizontal axis of the takeup unit 16, with a driven guide roll 12 and a yarn guide 15.1-15.3 for each winding position being arranged upstream thereof for advancing the yarn. To prevent different yarn deflections despite a different spacing between yarns while treating and while winding the yarns, the invention provides for orienting the guide roll 12 with its roll axis in the vertical direction to guide the yarns, and for arranging it laterally adjacent the yarn guides 15.1-15.3 such that the yarns can be advanced substantially in parallel relationship between the guide roll 12 and the yarn guides 15.1-15.3.

Abstract: Apparatus and method for electrospinning fibers in which the apparatus includes a spray head having a longitudinal axis and including at least one electrospinning element disposed in a peripheral wall of the spray head surrounding the longitudinal axis. The electrospinning element includes a passage by which a substance from which the fibers are to be electrospun is provided to a tip of the extrusion electrospinning element. The electrospinning element extends from the peripheral wall in a direction from the longitudinal axis and is configured to electrospin the fibers by electric field extraction of the substance from the tip of the extrusion electrospinning element.

Abstract: A calibrating basket for a film blowing tube is provided with roller bearings to prevent stripe formation on the film and pinching of the film between the rollers.

Abstract: An apparatus for heat treatment of oblong articles, such as monofilaments, multifilaments, tapes or webs of plastics, comprises a fixed bottom member (2) and a cover member (3) hingedly secured thereto along one long side, where the cover member (3) in the closed state together with the bottom member (2) define a hot-air channel (12). This hot-air channel extends lengthwise through the apparatus between the bottom member (2) and the cover member (3) from an inlet (14) to an outlet (15) in their respective ends in the apparatus. Means are provided for sealingly closing the slit (17) between abutting portions of the bottom member (2) and the cover member (3). These means for closing the slit (17) on the side of the apparatus being opposite the hinged side of the cover member (3) comprise a sluicing means (16). The sluicing means (16) is adapted to allow a lateral introduction of separate oblong articles into the hot-air channel (12) through a feeding track without completely opening said channel.

Abstract: A nozzle is described for downwardly directing air from an air intake of a fiber draw unit into a longitudinal channel of the fiber draw unit for forming spunbond polymeric fibers. The nozzle includes an upper eductor connected to the fiber draw unit and a lower eductor adjustably connected to the fiber draw unit and below the upper eductor. The nozzle includes a nozzle cavity that narrows from a nozzle inlet to a nozzle outlet and includes a downward turn of 90 degrees or less. Air directed through the nozzle outlet flows in a direction parallel to a wall of the longitudinal channel.

Abstract: The invention concerns an installation for producing a nonwoven web wherein the distance between the lower edge of the slit drawing device and the upper edge of the diffuser is maintained constant by uniformly distributed hasps.

Abstract: The present invention provides a meltblown die which has a considerable smaller width in the machine direction of the meltblowing process compared to conventional and commercially used meltblown dies. The meltblown die of the present invention has a. a die body; b. a die tip mounted to the die body; c. a first air plate mounted to the die body; and d. a second air plate mounted to the die body. In addition, the small size of the meltblown die of the present invention provides advantages over conventional meltblown die, including improved air entrainment.

Abstract: The invention concerns a device for opening and distributing a bundle of filaments when producing a nonwoven textile web by a technique which consists in: extruding melted organic polymer through a die perforated with holes, so as to form a bundle or curtain of filaments; then directing the extruded filaments by drawing by means of one or several fluid jets; and finally, receiving the bundle of filaments in the form of a web on a mobile conveyor belt. The invention is characterised in that it consists of an assembly arranged downstream of the outlet of the drawing assembly and separate therefrom, said assembly comprising, arranged in the proximity of the drawing slot outlet, a diffuser comprising an intake zone shaped as a convergent nozzle extending over the whole width of the installation opposite the drawing slot outlet producing the web, extended by a divergent nozzle, said assembly being associated with a ramp electrostatically charging the filaments before they are received on the receiving belt.

Abstract: An apparatus for producing spun-bond webs has, beneath the receiving belt, a suction unit having at least two suction zones including a primary suction zone and at least one other suction zone, the primary suction zone receiving most of the filaments from an aerodynamic stretching unit below a spinneret. The suction speeds in the two zones can be adjusted independently of one another. Preferably three such zones are provided in succession in the direction of displacement of the perforated belt.

Abstract: A spun-bond web-making apparatus has the cooling passage below the spinneret provided with a plurality of air chamber sections which are supplied with air at different temperatures, the cooling passage being connected to the drawing unit for aerodynamic stretching of the filaments without a gap through which external air can be supplied.

Abstract: A spinning-drawing-texturing machine for producing crimped threads is described, comprising a spinning device, a drawing device, a texturing device, and a take-up device. A plurality of threads spun by the spinning device is assigned to the drawing device, the texturing device, and the take-up device. According to the present invention, the drawing device and the texturing device are arranged in a processing module and the take-up device in a winding module underneath the spinning device. The processing module and the winding module are erected side by side and form one long side of the machine. This ensures a configuration divided by functional groups, which facilitates operation and increases operational reliability.

Abstract: A method for the production of cellulose fibers or filaments from cell material, by the dry-wet extrusion method with aqueous amine oxides, in particular, N-methylmorpholine-N-oxide as solve is described comprising the following steps: a) dispersion of a cell material, or a cell material mixture with a cuoxam DP from 250-3000, in aqueous amine oxide, b) transformation of the obtained dispersion, by water evaporation with shear, at elevated temperature, into a homogeneous solution with a zero shear viscosity of 600 to 6000 Pa·s and a relaxation time of 0.3 to 50 seconds all at 85° C.

Abstract: A parallel spinning process, in particular for filaments, e.g. for textile or industrial applications, made from polymers such as, for example, PET or PA, in each case having a thread interlacing device between two godets for each individual thread, the godets being moved in relation to one another during the piercing or feeding operation in such a way that each individual thread is automatically threaded into its interlacing device associated therewith, and the angle of wrap in the operating mode is at least from 85° to at most 200°, preferably from 175° to 185°.

Abstract: An apparatus for producing a multifilament yarn from a thermoplastic polymer includes a yarn guiding element being movable in a vertical direction. A drive serves to change the vertical position of the yarn guiding element with respect to a point of consolidation of the filaments. At least one sensor senses the yarn tension of the filaments. A control unit serves to control the drive in response to the sensed yarn tension to change the vertical position of the yarn guiding element.

Abstract: An apparatus for producing a web of continuous fibers having a melt extruder, an endless belt running in one direction and a guide box located between the extruder and the belt. The guide box has front and rear walls as viewed in the running direction of the belt, a pair of side walls extending between the front and rear walls and upper and lower end openings. The fibers extruded from the extruder enter the upper end opening by suction exerted in the vicinity of the lower end opening. The guide box is formed in the front wall and/or the rear wall with intermediate opening(s) serving to introduce the outside air into the guide box.

Abstract: BCF yarn is melt-spun, drawn and textured to provide morphologically stable BCF yarns. The yarn texturizing includes a relatively low efficiency fluid jet texturizer, that is a fluid jet texturizer operating at a sufficiently low fluid jet velocity and a sufficiently high fluid jet temperature to obtain a yarn skein shrinkage of less than about 0.50 inch, more preferably about 0.25 inch or less. Most preferably, the BCF yarns are formed of nylon-6 and exhibit an alpha-crystalline content of less than about 45%, and usually between about 45% to about 55%.

Abstract: The invention concerns an installation for producing a nonwoven web wherein the distance between the lower edge of the slit drawing device and the upper edge of the diffuser is maintained constant by uniformly-distributed hasps.

Abstract: Plastic moldings reinforced with long fibers are made without the risk of forming loops in a continuous thread or roving fed to a cutting unit at the end of a mold filling operation or tearing thereof during renewed start-up for the next molding filling operation, even at a relatively high take-off speed of the continuous thread. This is achieved by keeping the continuous thread permanently under tension pneumatically against the conveying direction. The device useful for carrying out this process is equipped with at least one tensioning air inlet in the guide for the continuous thread or roving.

Abstract: A system and methods for collecting and managing air discharged from a melt spinning apparatus. The air management system includes an outer housing defining a first interior space, an intake opening for receiving the discharged air into the first interior space, and an exhaust opening for discharging the air. Positioned within the first interior space is an inner housing defining a second interior space coupled in fluid communication with the exhaust opening and an opening fluidically coupling the first and second interior spaces. The air management system includes a flow control device inside the first interior space that controls the flow of air from the first interior space to the second interior space and an air-directing member outside of the first interior space near the intake opening that extends in a cross-machine direction for dividing the intake opening into two portions in a machine direction.

Abstract: Spunbond nonwoven fabrics are produced with an apparatus which comprises a spinnerette having a plurality of orifices for extruding filaments; an attenuator for receiving and attenuating the filaments; and a collection surface upon which the filaments are deposited to form a nonwoven web. A filament diffuser is positioned between the attenuator and the collection surface in the path of filament travel. The diffuser comprises a pair of opposing divergingly arranged side walls and a pair of opposing end walls, these walls collectively defining filament passageway. In accordance with one embodiment of the invention, a flow of fluid is injected along the walls of the diffuser in the direction of filament travel. More particularly, fluid is injected along both the opposing divergingly arranged walls and the opposing ends walls which form the diffuser. In another aspect of the present invention, the filaments are electrostatically charged and a like electrical charge is imparted to the walls of the diffuser.

Abstract: Stretched polymeric films can be used in a variety of applications, including optical applications. The stretching conditions and shape of the stretching tracks in a stretching apparatus can determine or influence film properties. Methods and stretching apparatuses can include adjustable or zone-defined stretching regions.

Abstract: A system and process for producing spunbond nonwoven fabric in which two or more polymeric components are separately melted and are separately directed through a distribution plate configured so that the separate molten polymer components combine at a multiplicity of spinnerette orifices to form filaments containing the two or more polymer components. Multicomponent filaments are extruded from the spinnerette orifices into a quench chamber where quench air is directed from a first independently controllable blower and into contact with the filaments to cool and solidify the filaments. The filaments and the quench air are directed into and through a filament attenuator and the filaments are pneumatically attenuated and stretched. The filaments are directed from the attenuator into and through a filament depositing unit and are deposited randomly upon a moving continuous air-permeable belt to form a nonwoven web of substantially continuous filaments.

Abstract: A melt spinning apparatus for spinning a synthetic yarn, wherein the yarn is formed by combining a plurality of filaments and wound to a package by means of a takeup device downstream of the spinning apparatus. Downstream of the spinneret, an inlet cylinder with a gas-permeable wall and a cooling tube are arranged. The cooling tube connects to a suction device such that an air stream forms in the cooling tube in the direction of the advancing yarn. This air stream assists the advance of the filaments and leads to a delayed cooling. To ensure adequate cooling of the filaments within the cooling zone, an air supply device is provided for generating an additional cooling air stream which flows in the axial direction of the cooling tube for cooling the filaments downstream of the inlet to the cooling tube.

Abstract: Improvements to processes and equipment for the manufacture of nonwoven webs useful in numerous applications including personal care, protective apparel, and industrial products. The fiber and/or filaments used to form the nonwoven fabric are deposited on a forming surface in a controlled orientation using application of an electrostatic charge to the fibers and/or filaments in combination with directing them to an electrode deflector plate while under the influence of the charge. The plate may be made up of teeth with a separation and angle orientation that are selected in accordance with the desired arrangement of the fibers and/or filaments in the nonwoven web. As a result, properties of the web such as relative strengths in the machine direction and cross-machine direction can be controlled.

Abstract: An apparatus for producing a melt blown web in which the collecting screen upon which the filaments are deposited passes over a plurality of suction regions or areas which have respective suction blowers and controls for the suction force and air throughput.

Abstract: Melt blown or spun bond nonwoven webs are formed by flowing fiber-forming material through a die cavity having a substantially uniform residence time and then through a plurality of orifices to form filaments, using air or other fluid to attenuate the filaments into fibers and collecting the attenuated fibers as a nonwoven web. Each die orifice receives a fiber-forming material stream having a similar thermal history. The physical or chemical properties of the nonwoven web fibers such as their average molecular weight and polydispersity can be made more uniform. Wide nonwoven webs can be formed by arranging a plurality of such die cavities in a side-by-side relationship. Thicker or multilayered nonwoven webs can be formed by arranging a plurality of such die cavities atop one another.

Abstract: A process for making a nonwoven fabric in which continuous fibers are evenly distributed and neither bundles nor lumps of the fibers, includes a guide box for continuous fibers being provided between extruding nozzles adapted to discharge the continuous fibers under hot air blast and a conveyor belt. The box has an upper end opening and a lower end opening being larger than the upper end opening. The continuous fibers are subjected to a suction effect provided from below the guide box so that the continuous fibers may be secondarily stretched and thereby thinned within the guide box.

Abstract: The present invention is directed to a draw jet for drawing thermoplastic polymer filaments including a drawing slot defined by an entrance member including a converging passageway communicating with a continuing passageway, terminating at an outlet portion, a drawing member including an inlet portion having a drawing gap width of about 2.0 to about 10 mm communicating with the outlet portion of the entrance member, and at least one air nozzle for directing high speed air onto the filaments in a downstream direction positioned between the outlet portion of the entrance member and the inlet portion of the drawing member, and with a nozzle gap width wherein the gap ratio of the drawing gap width to the combined width of all of the nozzle gaps is from about 1.0 to about 10.

Abstract: A cooling system for filament bundles, which are spun from polymer melt by at least two spinneret units (1) disposed one beside the other and are drawn off by a draw-off system (17), the filament bundles (3a, 3) being cooled in a three-part shaft (A, B, C) by an equidirectional air stream, and the cross-section of the individual shaft parts (A and B) tapering such that the flow rate of the air increases approximately to the same extent as the draw-off speed of the filament bundles (3a, 3).

Abstract: A new fiber-forming method, and related apparatus, are taught in which extruded filaments of fiber-forming material are directed through a processing chamber that is defined by two parallel walls, at least one of which is instantaneously movable toward and away from the other wall; preferably both walls are instantaneously movable toward and away from one another. Movement means provide instantaneous movement to the at least one movable wall. In one embodiment, the movement means comprises biasing means for resiliently biasing the wall toward the other wall. Movement of the wall toward and away from the other wall is sufficiently easy and rapid that the wall will move away from the other wall in response to increases in pressure within the chamber but will be quickly returned to its original position by the biasing means upon resumption of the original pressure within the chamber. In another embodiment the movement means comprises oscillating means for oscillating the wall at a rapid rate.

Abstract: The present invention is directed to a process for forming a plurality of multi-layered filaments from multiple thermoplastic synthetic polymers and an apparatus containing a melt spinning beam which comprises multiple polymer inlet passages each communicating with separate multiple coat hanger distribution manifolds, separate filters connected downstream of each coat hanger distribution manifold, a combining manifold connected downstream of said filters and spinneret orifices connected downstream of said combining manifold for spinning of said multi-layered filaments.