Abstract: Disclosed is a method for producing a high strength synthetic strength member (7) containing rope (1) capable of being used with powered blocks where such rope has lighter weight and similar or greater strength than steel wire strength member containing ropes used with powered blocks. Disclosed also is the product resulting from such method. The product includes a synthetic strength member, a first synthetic portion (9) and a second synthetic portion. The first synthetic pillion is enclosed within the strength member and the second synthetic portion is situated external the strength member. At least a portion of the second synthetic portion also is situated internal a sheath (8) formed about the strength member. The second synthetic portion has a minimal of 8% at a temperature of between negative 20 and negative 15° C.

Abstract: The invention relates to an oven for drawing fibers at elevated temperature, which oven is on two sides opposite one another provided with guide rolls dictating a zigzag up-and-down drawing trajectory for the fiber in the oven. In the oven according to the invention the drawing trajectory is at least 20 meters long and the rolls are driven. The invention also relates to a process for drawing fibers using the oven according to the invention, in particular to a process for producing highly oriented polyethylene fibers.

Abstract: A yarn conditioning apparatus for removing interlace nodes from a multifilament, crimped yarn, and including a first roll assembly for accepting the multifilament, interlaced yarn from a yarn supply at a predetermined yarn feed rate and outputting the yarn, and a second yarn roll assembly having a yarn feed rate greater than the yarn feed rate of the yarn input roll assembly for accepting the output yarn from the first roll assembly and stretching the yarn to a degree sufficient to remove interlace nodes from the yarn and outputting the conditioned yarn to downstream processes.

Abstract: A yarn conditioning apparatus and methods for removing interlace nodes from a multifilament, crimped yarn, and including a first roll assembly for accepting the multifilament, interlaced yarn from a yarn supply at a predetermined yarn feed rate and outputting the yarn, and a second yarn roll assembly having a yarn feed rate greater than the yarn feed rate of the yarn input roll assembly for accepting the output yarn from the first roll assembly and stretching the yarn to a degree sufficient to remove interlace nodes from the yarn and outputting the conditioned yarn to downstream processes.

Abstract: A method and apparatus for continuous drawing of fibers in the form of coiled fiber loops (e.g., polygonal or serpentine loops). The successive fiber loops are continuously laid on receiving ends of a plurality of conveyer-drawing members (CDM) [e.g., rotating threaded spindles (54) or circulating endless chains (80) and (108)] disposed about a central axis and diverged from this axis. Coiled fiber loops are conveyed along the central axis and simultaneously drawn by enlarging a circumference of the fiber loops by the CDM. The leading fiber loops are continuously taken off at delivery ends of the CDM and conveyed from the drawing apparatus at an outlet speed. Heat chambers (11) and (148) envelop at least the most part of CDM. The process can operate at low drawing speed and long drawing time typical for lab-scale experiments and equal or higher outlet speed and throughput typical for commercial drawing processes.

Abstract: A process to produce a fully oriented polyester yarn from a POY polyester yarn by drawing the POY yarn at a high draw ratio in the range of 1.8–2.3.

Abstract: The present invention provides for a method of cold drawing polymeric yarns suitable for use in implantable medical devices, such as vascular grafts. The method of the present invention produces cold drawn polymeric yarns that have a substantially uniform linear density and a highly oriented molecular structure as well as good lubricity, non-thrombogenicity and biocompatibility. In one embodiment of the present invention there is provided a method of cold drawing multi-filament PTFE yarns include the steps of maintaining the PTFE yarn at a temperature below the glass transition temperature of the yarn, drawing the yarn at such temperature over a first roller rotated about its axis at a first speed and a second roller rotated about its axis at a speed faster than the speed of the first roller to a selected denier and to increase molecular orientation; and twisting the drawn yarn.

Abstract: The present invention provides for a method of cold drawing polymeric yarns suitable for use in implantable medical devices, such as vascular grafts. The method of the present invention produces cold drawn polymeric yarns that have a substantially uniform linear density and a highly oriented molecular structure as well as good lubricity, non-thrombogenicity and biocompatibility. In one embodiment of the present invention there is provided a method of cold drawing multi-filament PTFE yarns include the steps of maintaining the PTFE yarn at a temperature below the glass transition temperature of the yarn, drawing the yarn at such temperature over a first roller rotated about its axis at a first speed and a second roller rotated about its axis at a speed faster than the speed of the first roller to a selected denier and to increase molecular orientation; and twisting the drawn yarn.

Abstract: A method and an apparatus for producing a highly oriented yarn (HOY) wherein the yarn is withdrawn from the nozzle of a spinneret at a withdrawal speed of at least 6,500 m/min. The filaments forming the yarn are drawn during their solidification, so that a highly oriented molecular structure forms in the polymer. To withstand the withdrawal tension generated by the high withdrawal speed without overstressing the filaments, the filaments are assisted in their advance before they solidify such that prior to the solidification a tensile stress relief is effective on the filaments, and that during the solidification a reduced withdrawal tension is effective on the filaments while they are drawn.

Abstract: A process for combining dyed or melt pigmented textile denier accent yarns in small yarn sizes, into a small building block carpet denier bundle to achieve a face yarn bundle having a wide range of special color effects and appearance, not attainable by manufacture of multi-colored carpets from carpet denier fibers alone. The carpet denier singles yarns are drawn, textured and air-jet entangled. At least one textile denier singles yarns, which is preferably a yarn having some degree of orientation, is then entangled with the carpet denier singles yarn, and the bundle is then wound up. The final yarn bundle may contain one or more fiber types, as well as at least one anti-static filament. The two types of singles yarn, i.e., the carpet denier and textile denier types, optionally have the same or different fiber cross-sections.

Abstract: Machine for spinning and texturing by false twisting, in which the false-twist zone comprises a plurality of identical texturing stations arranged side by side on a common frame, each station comprising in order, with regard to the displacement of the thread (2) during its texturing treatment:a first delivery (3) associated, if appropriate, with a system for drawing the thread (2) and making it possible to deliver the thread to be textured;a heating device (4) followed by a cooling zone (5) for the heated thread;a false-twist spindle (6);a second take-up (7) for the textured thread emerging from the false-twist spindle (6);if appropriate, a third take-up (8) of the thread, downstream of which is arranged a second thermal treatment zone (9), and;a final take-up arranged immediately in front of the receiving members,wherein the feed of threads to all the texturing stations is carried out from means for the spinning and drawing of chemical threads, which means are mounted on said texturing machine, the threads p

Abstract: It comprises a bowl (2) driven positively in rotation and a guide finger (3) which is spaced from the bowl (2) and is mounted on an arm (6) articulated relative to a support (7) mounted on the frame of the machine.The shaft (8) supporting the bowl (2) is equipped with a drive roller (12) which, in the working position, bears against a drive shaft extending over the entire length of the machine and common to all the workstations which the latter comprises.The articulated arm (6) is associated with means which, on the one hand, hold the drive roller (12) in bearing contact, with adjustable pressure, against the drive shaft during normal operation and, on the other hand, are neutralized when the articulated arm is moved away from said drive shaft.

Abstract: The invention relates to an apparatus for manufacturing multifilament threads with at least one hot-air module 6 for drawing or relaxing the thread Y. To manufacture multifilaments with particularly high strength and to avoid the problems of the bearings of the rollers 9, 10 in the hot-air modules 6, at least one apparatus is provided for screening the hot stream of air from the rollers 9, 10, 10' of the or each hot-air module 6. Such apparatus may, for example, take the form of divider sheets 12. To facilitate the introduction of the thread Y into the hot-air module 6, it may be furthermore provided according to the invention that two rows of rollers 9, 10 facing each other are arranged in the or each hot-air module 6, at least the rollers 10 of one row being arranged in the direction of the rollers 9 of the other row and movable beyond these so that a meander-shaped arrangement of the thread Y can be achieved automatically in the hot-air modules 6.

Abstract: A method and an apparatus for spinning, drawing, and winding a synthetic filament yarn, wherein a plurality of filaments are combined in a spin zone to a yarn. Subsequently, the yarn is drawn in a draw zone which includes a draw godet, and then wound in a takeup zone to form a package. To produce a cohesion of the yarn, the filaments are entangled within the draw zone before the yarn leaves the draw godet.

Abstract: The method of producing an industrial yarn at a production speed of from 3000 to 6000 m/min includes melt-spinning a plurality of polyester filaments; stretching a thread made from the filaments by means of a delivery assembly (1) and a drawing roller system (2); providing at least one thread-braking device (3) including at least one deflecting roller (31, 32) between the delivery assembly (1) and the drawing roller system (2); deflecting and decelerating the thread between the delivery assembly and the drawing roller system by means of the at least one thread-braking device (3) and looping the thread only once around the at least one deflecting roller (31,32) of the at least one thread-braking device (3). The at least one deflecting roller (31, 32) is braked to a circumferential speed (v.sub.3) given by the following formula v.sub.3 =v.sub.1 +(v.sub.2 -v.sub.1)* F, wherein 0.5.ltoreq.F<1, v.sub.1 =the delivery assembly speed and v.sub.2 =the drawing roller system speed.

Abstract: An apparatus for producing thick/thin effects in a filament yarn, whereby between inlet and outlet gallets or pairs of pinch rollers, in a stretching zone, the filament yarn contacts the periphery of at least one rotating disk which is heated and is formed with at least one region of reduced radius in which there is no contact between the filament yarn and the disk. The filament yarn is thereby stretched only in regions in which it is heated by contact with the disk periphery and remains thick in those regions in which it is unheated because of the presence of the recess.

Abstract: A method of and apparatus for producing a thin/thick effect yarn provides a thin/thick effect by segmentwise stretching of a filamentary precursor yarn which is combined with a fully-stretched filamentary precursor yarn so that the latter supports the former. The combination can be effected by twisting, nub entanglement or winding of one yarn around the other.

Abstract: A process for making ready-to-tuft, mock space-dyed bulked continuous filament yarn is a one-step process. It joins extruding, texturing, and interlacing to yield a yarn that may be tufted directly into carpet without further texturing or twisting. In another aspect, one or more additional strands may be inserted in the process. An apparatus for making the ready-to-tuft, mock space-dyed, bulked continuous filament yarn is described.

Abstract: Apparatus for twisting a travelling strand includes a rotary structure rotatable about a rotational axis X--X and a series of pulleys mounted on the structure in an array disposed about the rotational axis X--X with each pulley in the series mounted on the structure for rotation about an individual axis of pulley rotation which is generally parallel to the axis X--X and moves around that axis on rotation of the structure. An input strand guide pulley guides an input strand to be twisted onto a path in which it will successively engage the pulleys and a strand exit guide pulley guides the strand from that path into an exit path along the axis X--X. The rotary structure is driven through a drive shaft and the pulleys are rotated by gearing.

Abstract: A method and apparatus for spinning, drawing and winding a synthetic multi-filament yarn, wherein the yarn is subjected after drawing and prior to winding to a heat treatment for purposes of reducing its shrinkage tendency. In the heat treatment, the yarn advances along an elongated heating surface closely adjacent thereto but substantially in no contact therewith. The heating surface has a surface temperature which is above the melt point of the yarn. During the heat treatment, the yarn is subjected to a tension which is lower than the tension required for plastic deformation. The yarn wound by this method has a heat shrinkage tendency which is typically more than about 20%.

Abstract: A method and apparatus for producing a multifilament yarn by a melt spinning-draw process, and which includes applying additional heat to the melt in the region of the spinneret. The relationship between the withdrawal speed and draw ratio may be changed, and with an adaptation of other process parameters, it is possible to increase productivity. The process may be applied to continuous and discontinuous processes.

Abstract: This invention relates to a method and apparatus for producing a polyester fiber which cools a plurality of molten polyester fibers from a spinnert 2 to a temperature below a glass transition point, then takes up the fibers by a non-heating first godet roller at a take-up speed less than 4,000 m/min, heat-stretching the fibers between the first godet roller and a non-heating second godet roller 10 inside a normal pressure steam atmosphere (first heat-treating device 8) higher than the glass transition point of the polyester fiber, and heat-treats the fiber by a pressurized steam atmosphere (second heat-treating device 9) higher than 105.degree. C.

Abstract: In an apparatus for the spin-drawing, on multiple ends, of thermoplastic filament yarns on at least two pairs of godets (1, 2 and 1', 2'), their axes of rotation (7 and 8) are arranged skew with respect to each other in such a way that the axis of rotation (8) of the one godet (2) is arranged to be able to pivot within a plane (12) and the plane (12) forms an angle (.beta.) of 10.degree.-60.degree. with the plane (10). The arrangement according to the invention makes it possible for the first time to spin and simultaneously draw in an integrated manner on multiple ends.

Abstract: A method is described of drawing a pre-oriented multifilament yarn (POY yarn). Hereby the multifilament yarn is fed from a delivery godet, around which it is wrapped, at a first velocity into a main drawing zone and removed from the main drawing zone at a second velocity by a drawing-off godet around which it is wrapped. The drawing in the main drawing zone takes place between the delivery godet and the drawing-off godet whereby the drawing-off godet is heated to a temperature of between 160.degree. C. and 240.degree. C. The first and the second velocities are so adjusted with respect to each other that the second velocity is 70% to 180% greater than the first velocity.

Abstract: A method and apparatus for heat stretching a synthetic fiber rope. The rope is buoyed in a vessel containing a liquid medium, and this is heated to a predetermined stretching temperature. Tension is applied to the heated portion of the rope so as to stretch this to a predetermined increase in length. The process may be batchwise, or it may be continuous. In the batch process, a length of the rope is stretched in the heating vessel by a draw rod. In the continuous process, feed and take-up capstans pass the rope through a heating chamber, and then through a cooling chamber. The capstans are operated at different speeds so that the rope is tensioned and stretched between them within the vessel.

Abstract: A fabric material that has a high resistance to tearing and is useful for sporting goods utilizing wind pressure, for example, yacht-sails, paragliders and hanggliders, comprises a woven fabric comprising, as a principal fiber component, polyester fibers and satisfies the following specifications:(1) a basic weight of 20 to 100 g/m.sup.2,(2) a tensile strength of 30 kg/5 cm or more,(3) an ultimate elongation of 18% or more,(4) a burst strengh of 0.18 kg/cm.sup.2 or more,(5) a tear strength of 1.0 kg or more, and(6) an air permeability of 1.0 ml/cm.sup.2 /sec or lessand preferably the polyester fibers have an intrinsic viscosity of 0.7 to 0.95, an individual fiber thickness of 1.5 to 3.0 denier, a tensile strength of 6.0 g/d or more, an ultimate elongation of 20% or more, a gradient A of a stress-strain curve at a point on the curve at which the elongation of the fibers is zero, of 1.

Abstract: An improved draw pin device for use in drawing synthetic filaments is disclosed, the draw pin being rotated stepwise by means of a stepper switch device with the rotation being affected by the pulling action of the filaments.

Abstract: In sizing and drawing of one or more textile filaments, particularly a warp sheet of multiple filaments, by successively conveying the filaments through a sizing bath, a driven squeezing mechanism, a differentially driven spaced drying roller, and a warp beam or other filament winding mechanism, the filaments are heated to a temperature of approximately 100.degree. C. and maintained in a predetermined moistened condition, e.g., by the application of saturated airborne water vapor, within the draw zone between the squeezing mechanism and the drying roller, in order to achieve a sufficiently elevated temperature for draw stretching of polyester filaments, particular POY and LOY filament, without premature drying and undesirable cracking of the sizing applied to the filaments.

Abstract: In processes of the production of thermoplastic polymer yarns, a process for controlling slippage of yarn on rolls across which there is a tension change. The yarn is advanced along pairs of rolls with the yarn contacting the rolls in successive wraps. At least one of the rolls is driven and has a changing diameter as the yarn advances between at least two of the successive wraps. The wraps contact the contact areas on the surface of the driven roll to each define a total wrap angle for the wrap. The number of wraps is selected and the diameter of the driven roll at the contact areas is selected to increase or decrease the tension while preventing a wrap angle in creep for any one of the wraps from being greater than about 90% of the total wrap angle for the wrap.

Abstract: In a method and apparatus for producing a yarn, a synthetic pre-oriented multifilament yarn is fed at a first velocity to a non-heated pin having a diameter less than 10 mm. After turning the yarn around the pin for an angle between 270.degree. and 360.degree., the yarn is heated to a temperature between 100.degree. C. and 250.degree. C. for between 0.01 sec and 10 sec. The yarn is then drawn off the pin at a second viscosity higher than the first velocity.

Abstract: In a textile warping system having one or more driven yarn engaging or yarn winding rolls, e.g. a driven warp beam, braking of each driven component is controlled by an individual pneumatic brake operated by a central programmable logic control system to brake the driven component according to a predetermined relationship of decreasing speed to elapsed braking time.

Abstract: The invention includes a method and apparatus for applying an elastic strand to disposable diapers. It uses canted, spindle-equipped wheels for engaging an elastic strand, moving the elastic strand into a sinuous configuration and stretching the strand. Stripping belts apply the strand to a diaper component.

Abstract: A system to texturize partially oriented yarn in which the yarn is wrapped around a logarithmic spiral shaped hot draw pin to draw the yarn before the texturing thereof. The shape of the hot draw pin provides even distribution of normal force on the surface of the draw pin.

Abstract: In a textile draw warping system having independently driven sets of draw rolls and an independently driven warp beam, synchronous braking of the driven components is controlled by individual pneumatic brakes at each driven component operated by a central programmable logic control system to brake the driven components at respective rates of deceleration preset to maintain constant speed ratios between the driven components during braking. Auxiliary control of dynamic braking and driving of the several drive motors corrects deviations in the driven components' predetermined rates of deceleration.

Abstract: A stretching apparatus in accordance with the invention has an upstream roll (2) and a downstream roll (6) which are driven with a given peripheral speed ratio, together with a plurality of intermediate rolls (8, 9) which are not motorized, but which are coupled to each other to rotate with a given peripheral speed ratio which is less than the speed ratio between the upstream and downstream rolls (2, 6).

Abstract: Spin-drawing apparatus for simultaneously drawing and optionally entangling one or more yarn ends. The apparatus comprises three pairs of heated cylindrical rolls which provide for two stages of yarn drafting, the first two pairs of rolls being inclined at an acute angle to a vertical plane and being generally mutually parallel, and the third pair of rolls being generally perpendicular to the vertical plane. The yarn ends are (a) initially directed to the inner ends of the first pair of rolls, (b) directed from the outer ends of the first pair of rolls to the inner ends of the second pair of rolls, (c) directed from the outer ends of the second pair of rolls to the inner ends of the third pair of rolls, (d) directed from the outer ends of the third pair of rolls through optional corresponding yarn entanglers, and (e) directed from the optional yarn entanglers to corresponding yarn packages.

Abstract: A process and apparatus are provided for manufacturing a fasciated yarn having uniform yarn construction and high strength. The process comprises subjecting fibers to a draft cutting step, at least one amendatory draft cutting step and a yarn formation step wherein the fibers are continuously transferred from the draft cutting step to the yarn formation step without any substantial interruption of fiber movement between the steps.

Abstract: A continuous high speed spin-draw-false twist texturing process for producing a textured nylon yarn having high yarn uniformity is disclosed. The process comprises the steps of (a) melt-spinning a plurality of nylon filaments from nylon polymer; (b) cooling the filaments and combining them to form a yarn; (c) controlling the processing conditions of the nylon polymer of step (a) such that the relative viscosity of the yarn formed in step (b) is at least 45; (d) partially drawing the yarn at a draw ratio of from 2.3 to 3.5 and a temperature of at least 50.degree. C.; (e) simultaneously false twist texturing and further drawing the partially drawn yarn in a draw-false twist texturing zone at a draw ratio of from 1.1 to 1.5; and (f) withdrawing the textured nylon yarn at a speed of at least 1500 meters per minute. The process is particularly useful for the manufacture of textured nylon yarn having a linear density in the range of from about 10 dtex to about 50 dtex.

Abstract: A new process is provided for producing highly resilient, textured, continuous multifilament polymeric yarns and combinations of such yarns with other continuous filament yarns and with spun yarns. The unstable or wild loops which form in conventional air jet textured yarns are substantially eliminated in the product yarns of this invention. The product yarns are formed by continuously drawing polymeric yarn under controlled temperature conditions, texturing the yarn in an air jet texturizer and subjecting the textured yarn to saturated steam while restraining the linear shrinkage of the yarn in the presence of the steam, followed by continuous take-up of the yarn on a package.

Abstract: A draw-roll assembly is movable downwardly on guide rods from a working position into a filament take-up position. A slightly heavier counter weight connected with the draw-roll assembly by means of a cable ensures that the draw-roll assembly stays in the upper position even upon failure of a pneumatic control and also that the movement forces are limited substantially to the difference between the weights. An electro-pneumatic control controls the movement speed of the draw-roll assembly from the filament take up position into the working position.

Abstract: A process for producing a tube or rod of a polytetrafluoroethylene is described. The process comprises molding a polytetrafluoroethylene containing a liquid lubricant into a tube or rod by a paste process, removing the liquid lubricant, stretching the tube or rod in the lengthwise direction, and thereafter, by sintering the stretched tube or rod at a temperature of at least 327.degree. C. wherein the stretching of the tube or rod is carried out by the use of at least one pair of heating rolls which are each provided with a plurality of grooves. The process provided uniform stretching making it possible to produce a tube or rod with very small internal diameter.

Abstract: An improved process and apparatus for the spin-drawing of high-tenacity, technical-grade yarns is disclosed. The process and apparatus are particularly suitable for use with polyamide and polyester. High quality yarns having a low break elongation are obtained by maintaining the feed roll system at a constant temperature T.sub.E =(T.sub.G -20.degree. C.) to (T.sub.G +65.degree. C.), wherein T.sub.G is the temperature of the glass transition point. Filaments are passed over a roll system disposed between the feed roll system and the draw roll system and driven at a peripheral speed between that of the feed roll and draw roll systems. The filaments are passed over the roll system a maximum of three turns.

Abstract: A control circuit for apparatus stretching a web between intake, discharge, and intermediate pulling stations (20-1, 20-2, 20-3). The circuit includes a first signal generator (32) for providing a signal to the intake discharge station (20-1) corresponding to the desired speed of the web at that station. A multiplier (40) alters the first signal in accordance with the amount of overall stretching, or stretch ratio, desired in the apparatus. The multiplier provides a second signal to the discharge station (20-3) corresponding to the speed of the web at the discharge station necessary to obtain the overall stretching. A second signal generator (48-66) subtracts a selected amount of the difference between the first and second signals from the second signal to provide a third signal to the intermediate pulling station (20-2) that distributes the overall stretching in the apparatus between intermediate zones formed by the adjacent pulling stations.

Abstract: A plurality of yarns are drawn from supply sources onto feed rolls and over a set of draw rolls in adjacent relationship. The yarns are urged into a desired contiguous relationship on the draw rolls by a concave guide surface in the course of passing from the yarn feed rolls to the draw rolls.

Abstract: A high speed yarn feeding apparatus for feeding yarn from a yarn supply source to a yarn take-up apparatus is disclosed which is capable of being threaded by conventionally employed suction nozzles. The yarn feeding apparatus employs at least one stepped godet roller having a small diameter portion on which the travelling yarn is initially threaded. A yarn hooking means is provided on the peripheral surface of the stepped side of the large diameter portion of the stepped roller. Means is provided upstream of the stepped roller for shifting the travelling yarn from a position aligned with the small diameter portion to a position aligned with the large diameter portion of the stepped roller. The yarn hooking means can take various conformations and more than one hooking means can be provided on a single stepped godet roller.

Abstract: Fasciated yarn having uniform yarn construction and high strength, comprising a staple fiber group having a special staple assortment for making such a fasciated yarn.

Abstract: A plurality of yarns are drawn from supply sources onto feed rolls and over a set of draw rolls in adjacent relationship. The yarns are urged into a desired contiguous relationship on the draw rolls by a concave guide surface in the course of passing from the yarn feed rolls to the draw rolls.

Abstract: A straightened, textured yarn is produced employing an apparatus comprising a crimping means, an entangling means and a heating and tensioning means which heats and applies tension to the crimped and entangled yarn prior to packaging.

Abstract: A continuous synthetic filament yarn is processed by crimping, entangling, and straightening the yarn. The yarn is straightened by heating under tension, resulting in a yarn that can be used in its straightened form and later bulked by a subsequent process such as dyeing, boiling, heating, etc. The length of a yarn plug formed by crimping is controlled by controlling the temperature of the yarn.