US3024517A - Method of treating filament yarn - Google Patents

Method of treating filament yarn Download PDF

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Publication number
US3024517A
US3024517A US56983A US5698360A US3024517A US 3024517 A US3024517 A US 3024517A US 56983 A US56983 A US 56983A US 5698360 A US5698360 A US 5698360A US 3024517 A US3024517 A US 3024517A
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Prior art keywords
yarn
filaments
wheels
zone
members
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US56983A
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English (en)
Inventor
James E Bromley
William H Hills
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Solutia Inc
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Chemstrand Corp
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Priority to BE590957D priority Critical patent/BE590957A/xx
Priority to NL251708D priority patent/NL251708A/xx
Priority claimed from US813902A external-priority patent/US3024516A/en
Priority to GB15599/60A priority patent/GB905247A/en
Priority to CH568160A priority patent/CH424072A/fr
Priority to DE19601435376 priority patent/DE1435376A1/de
Application filed by Chemstrand Corp filed Critical Chemstrand Corp
Priority to US56983A priority patent/US3024517A/en
Publication of US3024517A publication Critical patent/US3024517A/en
Application granted granted Critical
Priority to JP41049463A priority patent/JPS4818148B1/ja
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D02J1/226—Surface characteristics of guiding or stretching organs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
    • B65H51/10—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements with opposed coacting surfaces, e.g. providing nips
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/14—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using grooved rollers or gear-wheel-type members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • This invention relates to a method and apparatus for processing cold-drawable textile filaments formed from a thermoplastic polymer. More particularly, this invention relates to a method and apparatus for continuously stretching and continuously deforming substantially parallel synthetic continuous textile filaments of the nylon type, whereby such filaments are rendered potentially crirnpable.
  • Continuous synthetic cold-drawable filaments can be formed from nylon polymers and the like by the wet, dry, or melt spinning processes, the last mentioned process being employed in the commercial production of most, if not all, of the nylon filaments made today.
  • the freshly formed nylon filaments generally are not highly oriented and have relatively low tensile strengths as compared to highly oriented nylon filaments in which the molecules are aligned or oriented in the direction of the filament axis.
  • synthetic filaments are relatively straight and have a smooth, slick surface, thereby not being particularly adapted for spinning into spun yarn by the conventional spinning systems.
  • synthetic staple fibers are subjected in connection with spinning them into spun yarn
  • it is essential to crimp them so that they will have a satisfactory contour or pattern to permit spinning thereof into spun yarn by means of conventional textile processing equipment.
  • Numerous devices and processes have been proposed to impart this desired crimp or crinkle to synthetic continuous filaments.
  • One known form of a crimping device uses toothed gearing or serrated engaging wheels that are heated and adapted to receive the straight continuous filaments and to shape same by compressive forces into a crimped configuration.
  • continuous filament yarns have the advantage of greater evenness and superior strength, they have several undesirable properties including low heat insulating values, lack of bulkiness desired for some end uses, and low covering power. Many attempts have been made in the past to impart some of these desirable properties of spun yarn to continuous filament yarn. In addition to the fact that the expense of manufacturing the yarn is increased considerably, there are unfortunately certain well recognized disadvantages associatedwith the prior devices and methods for imparting bulk to continuous filament yarn.
  • An object of this invention therefore is to provide a simple, rapid, and economical method for commercially producing a thermoplastic continuous multiiilament or monofilament yarn having a flufiy, stretchable character and possessing many properties associated with spun yarn while retaining many properties associated with filament yarn such as strength and freedom from pilling.
  • Another object .of this invention is to provide a continuous method for drawing and deforming nylon filaments in a single operation so as to render same potentially highly crimpable.
  • Still another object of this invention is to provide a method for simultaneously deforming and cooling nylon filaments immediately after said filaments are oriented by a drawing operation.
  • a further object of this invention is to provide a method for producing oriented nylon filaments having potential crimpability.
  • a still further object of this invention is to provide an improved stretching and deforming apparatus for processing nylon or the like.
  • a yet further object of this invention is to provide an apparatus for processing colddrawable synthetic filaments with which unstretched or unoriented continuous filaments are fed by a power driven feed roller through a heat-stretch zone wherein the fila ments are heated and stretched and from which the filaments are fed between positively driven intermeshing toothed wheel members, the teeth of which are in closely spaced adjustment, and a desired number of times around one of said members in such a manner to provide reduced tensioning with each wrap and a separator bar or roller in spaced relationship therewith and axially askew with respect to the axes of said members.
  • FIGURE 1 is a schematic view in perspective with principal parts in location illustrating one arrangement of apparatus suitable for preparing the potentially crimpable thermoplastic filaments of this invention
  • FIGURE 2 is a fragmental view on a larger scale in perspective .partly in axial section illustrating with more particularity the yarn heating device of the apparatus herein disclosed;
  • FIGURE 3 is a detailed fragmental plan view illustrating an organization of two tapered crimping toothed wheel members and a fixed spacer bar, as well as two externally contacting spur gears operatively associated with said members to drive same; 7
  • FIGURE 4 is an elevational view in section illustrating the teeth of the wheel members in closely spaced engage: ment and the teeth of the spur gears in working contact;
  • FIGURE 5 is a schematic view in front elevation with principal parts in location illustrating another arrangement of apparatus of the present invention with which the stretched and deformed filaments can be subjected to an additional heat treatment while relaxed to develop the potential crimpability therein.
  • an improved stretching and deformingmachine for processing nylon or like synthetic continuous filament yarn, the machine being constructed for highly efficient and economical operation.
  • This is made ,possible by the novel construction and arrangement of a feed roll assembly and a set of drawing and deforming toothed wheel members, together with means for heating the yarn such as a heated draw or stretch pin, a heated plate, a heated tube, and the like interposed between the said roll assembly and said members.
  • the yarn is fed to the said feed roll assembly after being passed around or through a suitable tensioning device. At least one of the rolls is positively driven.
  • the objectives of the roll assembly are the provision of a supply of yarn at a predetermined rate and the provision that the yarn will not slip therethrough or therearound due to the stretch tension subsequently applied.
  • a pair of toothed wheel members driven in unison and intermeshing in close relationship without coming in contact with each other. At least one of said members is positively driven at a predetermined increased speed relative to the delivery speed of the roll assembly such that a stretch is imparted to the yarn between the said roll assembly and said members.
  • the yarn normally advancing in the heat-stretch zone defined by the roll assembly and the members and in which the yarn heating means is disposed ordinarily contacts the surface of said heating means to heat the yarn as desired with stretching of the filaments occurring continuously between the roll assembly and the members, including when the filaments are in contact with the yarn heating means where most of the attenuation of the filaments is localized.
  • the yarn is directed in operation between said members and preferably around part of the periphery of one of the members and thence around part of the periphery of a spaced apart roller or separator bar for a desired number of times with the yarn taking a path that is progressively longitudinally forward with respect to the point where said yarn initially is passed between the toothed wheel members.
  • the yarn is intermittently engaged and disengaged between the members either in a random or definite pattern.
  • the members not only serve to deform the filaments of the yarn but also function to cool rapidly or to quench and thereby to harden them as they pass therebetween.
  • the members are made preferably of heat conductive material.
  • the yarn is taken up by suitable means in an orderly form.
  • the yarn after being stretched and deformed by the toothed wheel members but before collection thereof is subjected to an elevated temperature while little or no tension to develop substantially the potential or latent crimp formed therein by the preceding treatment.
  • nylon yarn may be stretched at a draw ratio between 1.0 to 1.1 and 1.0 to 6.0 and deformed in accordance with the present invention without difiiculty at filament through-put speeds up to and above 1000 yards per min ute.
  • thermoplastic cold-drawable yarn indicated by numeral 10 such as nylon and the like and composed of a bundle of smooth substantially parallel filaments that have not been fully oriented is supplied from a yarn source. Since the yarn is not completely oriented, it is necessary to extend the yarn to be process in order to obtain the optimum degree of molecular orientation therein.
  • the yarn source can be, for example, yarn package 11 previously doffed from a conventional spinning machine.
  • yarn is passed over and around one end of bobbin 12 or other yarn holder, such as a pirn or cone holding a yarn source.
  • the yarn 10 is threaded conventionally around snubbing bar 13 which functions as a simple, uncomplex tensioning device to assist in maintaining an orderly and uniform supply of yarn. It will be perceived readily that other tensioning devices such as the gate type can be used instead of the tensioning device shown or that the need of a tensioning device may be eliminated entirely.
  • the yarn 10 is passed through a yarn guide 14, if needed, and then to a rotatably arranged thread advancing means 15 that withdraws the yarn from bobbin 12 and supplies same at a controlled supply rate and that is operated at a first delivery speed.
  • means 15 comprises a pair of suitably mounted feed rolls, at least one of which is positively driven.
  • the rolls have parallel axes and engage each other in operation to nip sufficiently the yarn passing therethrough so that slippage or free-flight of the yarn between the rolls is prevented.
  • the yarn 10 is led downwardly and around heated stretch or draw pin 16 where the majority of the attenuation of the yarn occurs.
  • the pin is mounted to be stationary and axially askew with respect to the axes of the feed rolls and has a smooth yarn contact surface, details of the pin being shown with more particularity in FIGURE 2.
  • the yarn 10 is directed downwardly between rotatably mounted and axially parallel wheel members 17 and 18 having a plurality of uniformly circumferentially spaced and longitudinally extending teeth 20 that mesh in closely spaced adjustment, said members being spaced a short distance below pin 16.
  • Members 17 and 18 are keyed to shafts 21 and 22 respectively or are integral therewith.
  • external contacting spur gears 23 and 24 having horizontally parallel axes, that mesh and are fixedly mounted on shafts 21 and 22.
  • the yarn is subjected to laterally applied strains increasing and decreasing in intensity as the yarn approaches and leaves the horizontal plane in which the axes of said wheel members lie and where said teeth engage the notches defined by said teeth to the greatest extent.
  • the yarn After being directed around part of the periphery of one of the members, the yarn is directed tangentially therefrom and then around part of the periphery of a roller 25 mounted on a supporting frame for free rotation and positioned adjacent roll 17.
  • a spacer bar fixedly mounted to a frame may be a suitably equivalent spacing means for roller 25.
  • the yarn 10 is wound around member 17 and roller or spacing means 25 a plurality of times as shown in FIGURE 1.
  • the axis of said roller 25 is positioned at a slightly inclined angle with respect to the axes of members 17 and 18 so as to insure proper longitudinal distribution on and advancement along the peripheries of member 17 and roller 25, thus preventing superposition of the wraps thereon.
  • the yarn wrapped around said members and the horizontally spaced roller associated therewith assumes generally the shape of a flattened helix, the convolutions of which are spaced apart, whereby the yarn advances along wheel member 17 from the inboard end thereof to the outboard end thereof during rotation of the members 17 and 18.
  • the moving yarn is periodically engaged and disengaged between the wheels either in a random or definite pattern.
  • the segments of the filaments forming the ridges of the corrugations induced during initial deformation do not form ordinarily the same part of the corrugations previously formed, whereby the distortion and deformation occurring during the operation fortuitously are induced. It is seen further that the temperature at which the yarn is directed between the wheel members progressively diminishes as the yarn moves longitudinally forward on wheel members 17.
  • the temperature at which the first deformation is conducted is more elevated than during subsequent reengagements of the yarn between the said wheels.
  • the yarn after forming the outermost convolution is fed vertically downwardly through yarn pigtail guide 26 or the like, if needed, which is suitably mounted and located below said wheel members.
  • the yarn is then taken up in an orderly arrangement in a conventional manner by a suitable form of package building apparatus.
  • the yarn is taken up by a ring twisting assembly generally denoted by reference number 27 which comprises a bobbin 28 adapted to be rotated by driven belt 30 in a conventional manner to collect a supply of the yarn indicated by numeral 31.
  • the assembly further comprises a conventional vertically reciprocatable spinning ring 32 carrying a ring traveller 33 adapted to revolve freely about the bobbin 28 as the yarn is twisted a desired amount and wound on the bobbin.
  • the yarn will tend to move outboard along said wheel instead of perhaps becoming accumulated and entangled thereon.
  • the wheel members 17 and 18 are tapered and the yarn progresses longitudinally along these members in the converging direction, the extent to which the yarn is deformed into a corrugated shape as it passes between the members from the normally unbent shape will diminish with the frequency of the corrugations remaining the same.
  • the yarn is subjected to a reduced tension between each successive engagement of the yarn and the wheel members.
  • the wheel members have the shape of a truncated cone instead of being cylindrical. It should be understood that the reduced tensioning may be attained by other means.
  • FIGURE 2 where one form of a yarn braking device or stretch pin 16 which is called sometimes a snubbing pin is shown in more detail and which is employed according to the present invention, said pin being non-rotatably mounted, preferably in the position indicated in FIGURE 1.
  • the cross-section of the pin for best results is preferably circular but also may be elliptical or have any other suitable cross-sectional design. Since the yarn 1t frictionally engages the surface of the pin as it travels therearound, the surface of yarn contact area thereof for best results is smooth or moderately smooth and is made of a mechanically very resistant-towear material.
  • the stretch pin 16 can be made of a wide variety of wear resistant materials including stainless steel, chromium plated steel, aluminum, a bonded ceramic and the like. Preferably, it is made of aluminum flameplated with aluminum oxide or flame-plated with sintered tungsten carbide which is extremely resistant to wear and performs efiiciently at the temperatures employed.
  • the stretch pin 16 is provided with heating means 35 so that the yarn passed therearound is heated to a predetermined elevated temperature.
  • the heating of the pin can be achieved in a suitable manner, e.g., by heated fluid inside thereof or by internal electric resistant heating which is preferred in view of its convenience in operation. It is also contemplated within the purview of the invention to provide a stretch pin with a high frequency heating means.
  • stretch pin 16 is provided with an electrically energizable heater element 35, electrical power being supplied thereto through conductive lines 36 having a terminal plug 37 adapted for reception in a power outlet source.
  • the heater element may be embedded in the pin as shown or it may be part of a removable cartridge or insert. While there seems to be no theoretical limit for the diameter of pin 16, it is desirable to stay within a reasonable range from a practical standpoint.
  • gears 23 and 24 contact during operation, but teeth 20 extending longitudinally of wheel members 17 and 18 are in close but spaced adjustment.
  • the lateral pressure applied to the yarn 10 passing between members 17 and 18 to deform same into a corrugated shape is applied mostly along the apices of teeth 20 and not in the grooves therebetween. This is accomplished by proper selection of the height and slope of the teeth.
  • the amplitude of the corrugations formed in the yarn is controlled as a function of the height of the teeth 20, as well as the extent to which the teeth engage in the grooves.
  • the frequency of the corrugations that is the number of alternate ridges and grooves formed in a given length of yarn, is of course controlled as a function of the number of teeth disposed along a given segment of the circumference of the wheel members 17 and 18.
  • thermoplastic continuous filament yarn 10 which is not fully oriented is withdrawn from a yarn package 11 and is passed over one end of bobbin 12 or other yarn holder.
  • the yarn is passed around snubbing bar 13' and through a pigtail guide 14, after which it is led through a rotatably mounted feed roll assembly designated generally by numeral 45, said assembly comprising idler roll 46 having a rubber cot and idler roll 47 associated with driven roll 48.
  • Shaft 50 is attached at an end of roll 46 and is mounted at the other end at point 51 for pivotal movement of roll 46 about 51.
  • Coiled spring 52 is fixed at one end with the other end being attached to shaft 50 as indicated so as to bias swingable idler 46 into frictional engagement with roll 48.
  • the yarn is passed helically around driven feed roll 48 and idler roll 47 and then contacts heater plate 49*, the surface of which is stationary and maintained at a suitable temperature by internal electrically energizable means.
  • the number of laps of the yarn around these rolls is sufiicient to prevent slippage of the yarn through the roll assembly 45.
  • the yarn then is passed through the toothed wheel members 17 and 18 which are rotated normally at a greater peripheral speed than the peripheral speed of the driving roll 48, thereby tensioning and stretching the yarn between said feed roll assembly and said members.
  • the drawn yarn is passed helically about wheel 17 and separator roll 25.
  • the drawn, deformed thermoplastic filament yarn is subjected to a final heat treatment in a hot aqueous medium such as steam or by dry or combination of both in a relaxed or substantially relaxed condition.
  • a hot aqueous medium such as steam or by dry or combination of both in a relaxed or substantially relaxed condition.
  • This operation develops the potential crimpability induced in the yarn by the prior operation and simultaneously sets the thus-developed crimp, thereby imparting enhanced bulkiness, crimpiness, and stretchability to the yarn.
  • the yarn is permitted to fall onto a conveying means 53, as for example an endless driven belt.
  • the yarn may be layed onto such a belt in a zig-zag pattern by means of a traverse piddler (not shown).
  • Belt 53 carrying the yarn is passed through a heating zone in cabinet 54 having a radiant heat applicator means 55, such as an array of heating lamps, thus developing the crimpiness in the yarn.
  • a radiant heat applicator means 55 such as an array of heating lamps
  • the yarn is cooled. This may be accomplished by passing the yarn without undesirable tensioning for a short distance through the air, excessive tension being avoided because the developed crimpiness may be destroyed thereby.
  • the yarn is taken up in an orderly manner.
  • traverse guide 56 lays the treated yarn on a bobbin 57 surface driven by roller 58 to form a yarn package 60. It will be appreciated that the speed of yarn take-up on bobbin 57 will be coordinated properly with the delivery speed of the yarn on means 53 so that undue tensioning therebetween and excessive yarn accumulation on means 53 are prevented.
  • filament yarn of a thermoplastic polymer which is not fully oriented can be advantageously treated to render same potentially crimpable, and capable of being easily transformed in a yarn having increased elasticity or stretchability and improved bulkiness, this being accomplished in a useful, rapid, and economical method.
  • the method of this invention comprises providing a source of not fully oriented continuous filament yarn in the form of a monofilament or bundle of filaments having little or no twist, the filaments being nylon or the like.
  • the yarn is continuously passed through a stretching zone wherein the filaments are heated to an elevated temperature, such as by passing same around a heated stretch pin or heated plate interposed in said zone.
  • the filaments are deformed into a corrugated shape having alternate ridges and grooves while being cooled by passing between the engagements of toothed wheels, the teeth of which are fitted together in closely spaced adjustment.
  • the filaments are redeformed intermittently into a corrugated shape a number of times by being passed between said wheels a corresponding number of times, each subsequent redeformation occurring at a somewhat lower temperature.
  • tapered wheels are employed, the tension to which the yarn is subjected between each successive engagement of the yarn and the wheels is decreased.
  • the yarn which is markedly potentially crimpable thereafter is collected.
  • An additional operation whereby the crimp is developed includes subjecting the yarn while relaxed to another heat treatment as above described.
  • the method of the present invention is applicable to a wide variety of continuous filament yarns, the requirement being that the yarn is made from a thermoplastic fiber-forming resin and which can be extended by drawing and then show increased molecular orientation along the filament axis.
  • the yarns may be formed by known techniques from these resins, including melt extrusion, wet spinning processes, and dry spinning processes.
  • fiber-forming synthetic polymers which are included in the thermoplastic fiber-forming resins may be mentioned polyethylene; polypropylene; polyurethane; copolymers of vinyl acetate and vinyl chloride; the copolymers of vinylidene chloride and a minor proportion of mono-olefinic compounds copolymerizable therewith, such as, for example, vinyl chloride; homopolymers of acrylonitrile, copolymers of acrylonitrile and a minor proportion of at least one mono-olefinic compound copolymerizable therewith and polymer blends containing combined acrylonitrile in a major proportion; copolymers of vinyl chloride and acrylonitrile; linear polyesters of aromatic dicarboxylic acids and dihydric compounds, such as polyethylene terephthalate and the polyester derived from terephthalic acid and bis-1,4-(hydroxymethyl) cyclohexane; linear polycarbonamides such as, for example, polyhexamethylene adipamide, polyhexam
  • nylon including nylon 66, nylon 4, nylon 6, nylon 610, nylon 11, and their fiberforming copolymers thereof e.g., 6/66, 6/ 610/ 66, 66/610, etc.
  • the number of fins may be two, three, four, or more; and yarns having the fins are prepared by conventional methods, such as by employing during spinning a spinneret adapted to produce filaments having the desired number of fins or legs. It has been found that the yarn having the noncircular cross-section and whose bulk has been enhanced by the method and apparatus of the present invention is excellent for rugs and the like.
  • Twisted yarn can be processed as well as untwisted yarn, the requirement being that the yarn is not fully oriented. However, it is preferred to start with a source of yarn having zero twist or substantially no twist. Pretwisting of the yarn is generally unnecessary and for economic consideration is preferably avoided.
  • the denier of the thermoplastic yarn can vary considerably, as well as the denier of the individual filaments, the ordinary deniers of commercially available yarns being com pletely suitable. Yarns having different compositions and deniers can be combined before being processed to produce novelty effects.
  • the temperature at which the yarn heating means is operated depends upon many factors including the type of yarn, the yarn linear speed, and the construction thereof.
  • the temperature of the yarn should be elevated preferably to a temperature below the temperature at which adjacent filaments will stick during the process. However, the temperature should be sutficient so that the yarn will be deformed or distorted by the interrneshing of the teeth of the stretching wheels without undue filament breakage.
  • the temperature to which the yarn is subjected may be in the range of C. to 250 C. when nylon 66 is processed.
  • the surface temperature of the yarn heating means will depend on the many factors, such as the denier of the yarn and the speed of the yarn.
  • Stretchable refers to the fact that the yarns produced in accordance with this invention are elastic and have the ability to accept a slight longitudinally applied stress and thereby to become easily extended a considerable length without permanent elongation thereof.
  • the yarn can be elongated 10 to 100 percent or more from its untensioned or relaXed length and immediately recover from this elongation in the nature of the so-called stretch-yarn. It is preferred for some end uses to develop the potential crimpability of the yarn after same has been converted into a textile article.
  • the stretched and deformed yarn prior to the final heat treatment advantageously may be tufted into a carpet after which the heat treatment is applied.
  • the tufts of yarn disposed on the face of the carpet will bulk to a notable extent, thereby imparting more luxurious appearance to the carpet.
  • the potential crimpability in the yarn which is on the back of the carpet and in the backing material, since it is tightly held at these points, will not be developed, thereby providing an overall more economical utilization of the yarn.
  • the tufting operation is made more convenient when the crimp is subsequently developed.
  • Example 1 The filaments used as a yarn source were prepared by melt spinning polyhexamethylene adipamide, the cross section of which was Y-shaped. A yarn composed of 68 of these undrawn filaments, each of which had a denier of 60 and a twist of zero turns per inch, was wound (from a spinning machine) onto a bobbin for treatment.
  • Apparatus corresponding to that in FIGURE 1 was used to treat the yarn.
  • the yarn was unwound for treatment from the bobbin by passing same through a pair of positively driven feed rolls, the rate of withdrawal being about 100 yards per minute. From the feed rolls the yarn was led onto and around a stationary stretch pin one time, the yarn movement describing a helical path therearound.
  • the surface temperature of the pin was maintained at 210 C. by an electric resistant heater lo cated inside the pin and controlled by a thermistor temperature sensing control device.
  • the yarn was fed between two metal toothed wheels meshing but not having contacting teeth. The wheels were driven in unison at a predetermined speed so that a stretch of about 400 percent occurred in the yarn between the feed rolls and withdrawal from these wheels.
  • the yarn was passed through the wheels for an additional three times; before each pass the yarn was directed around a spaced roller. Thereupon the yarn was collected on a conventional ring twister assembly.
  • a tufted carpet was produced from the yarn so treated.
  • the carpet was subjected to live steam at an elevated temperature of 130 0., thereby developing the potential crimpability therein.
  • the resulting carpet had a flulfy, bulky appearance and possessed an aesthetic appeal.
  • the method results in the production of yarns having desirable bulk and is broadly applicable to produce such yarns from a wide range of cold-drawable filaments manufactured from thermoplastic resins.
  • the improved device for processing continuous filaments, for example, of the nylon type, which may be run at a high speed and high efiiciency requires little operator attention.
  • the construction and arrangement of the device make it possible to convert at moderate expense existing textile processing equipment such as a draw twister adapted for nylon processing into a machine of the type disclosed and claimed herein.
  • the apparatus of the present invention can be adapted easily for the production of yarn having a low crimpability to a high crimpability.
  • the inherent properties of the treated yarn are such that they impart numerous and desirable properties in woven, non-woven, and knitted fabrics.
  • Yarns composed of non-circular cross-sections and processed in accordance with the present invention have increased resiliency and 10 enhanced covering power eminently suitable for rugs, carpets, and the like.
  • yarn is used in the specification and in the claims as referring to continuous multifilarnents, as well as to a continuous monofilament.
  • a method for texturing a continuous filament yarn made from a thermoplastic polymer whereby potential crimpiness is imparted thereto comprising the steps of providing a source of a molecularly orientable continuous filament yarn made from a thermoplastic polymer, continuously passing said orientable yarn through a.
  • a method for treating a continuous filament yarn made from a nylon polymer whereby potential crimpiness is imparted thereto comprising the steps of providing a source of a molecularly orientable nylon continuous filament yarn, continuously passing said orientable yarn through a heat-stretch zone, wherein the yarn is heated to an elevated temperature and is attenuated a predetermined extent thereby to increase the molecular orientation thereof, the majority of the attenuation being localized in the area where said yarn is heated, thereafter continuously deforming the heated and stretched yarn into a corrugated shape simultaneously while same is being cooled by continuously passing the yarn between the engagement of toothed wheels, then intermittently redeforming the yarn into a corrugated shape a plurality of times by passing same between said wheels a corresponding number of times, reducing the tension on the yarn between each successive engagement of the yarn and said wheel, and collecting said yarn in an orderly manner.
  • nylon filament yarn is composed of polyhexamethylene adipamide polymer and has a non-circular cross-section, the temperature to which said yarn is subjected in said heatstretch zone being in the range of C. to 250 C.
  • a method for texturing a continuous filament yarn made from a nylon polymer comprising the steps of providing a source of a molecularly orientable nylon continuous filament yarn, continuously passing said orientable yarn through a heat-stretch zone, heating the yarn in said zone to an elevated temperature and attenuating the yarn in said zone a predetermined extent thereby to increase the molecular orientation thereof, the majority of the attenuation being localized in the area where said yarn is heated, thereafter continuously deforming the heated and stretched yarn into a corrugated shape simultaneously while same is being cooled by continuously passing the yarn between the engagement of toothed wheels, successive portions of the yarn being subjected to forces laterally applied by the teeth of said wheels alternately in one direction and then in the opposite direction to cause deformation of the yarn mostly along the apices of the teeth, intermittently redeforming the yarn into a corrugated shape a plurality of times by passing same between said wheels at predetermined intervals a corresponding number of times, permitting the yarn to relax, subjecting the yarn while relaxed to an elevated
  • a method for treating a continuous filament yarn made from a nylon polymer comprising the steps of providing a source of a molecularly orientable nylon continuous filament yarn, continuously passing said orientable yarn through a heat-stretch zone, wherein the yarn is heated to an elevated temperature and is attenuated a predetermined extent thereby to increase the molecular orientation thereof, the majority of the attenuation being localized in the area where said yarn is heated, thereafter continuously deforming the heated and stretched yarn into a corrugated shape simultaneously while same is being cooled by continuously passing the yarn between the engagement of toothed wheels, intermittently redeforming the yarn into a corrugated shape a plurality of times by passing same between said wheels at predetermined intervals a corresponding number of times, reducing the tension on the yarn between each successive engagement of the yarn and said wheels, permitting the yarn to relax, subjecting the yarn while relaxed to an elevated temperature thereby to develop the potential crimpiness induced in the yarn and to set the thus-developed crimpiness, cooling the yarn without excessive tensioning
  • nylon yarn is composed of polyhexamethylene adipamide polymer and has a non-circular cross-section, the temperature to which said yarn is subjected in said heat-stretch zone being in the range of C. to 250 C.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US56983A 1959-05-18 1960-09-19 Method of treating filament yarn Expired - Lifetime US3024517A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE590957D BE590957A (pt) 1959-05-18
NL251708D NL251708A (pt) 1959-05-18
GB15599/60A GB905247A (en) 1959-05-18 1960-05-03 Method and apparatus for treating filament yarn to impart potential crimp thereto
DE19601435376 DE1435376A1 (de) 1959-05-18 1960-05-18 Verfahren und Vorrichtung zur Behandlung von synthetischem,kontinuierlichem Fadengarn
CH568160A CH424072A (fr) 1959-05-18 1960-05-18 Procédé de fabrication d'un fil formé d'un ou plusieurs filaments synthétiqués continus en polymère thermoplastique, et appareil pour la mise en oeuvre du procédé
US56983A US3024517A (en) 1959-05-18 1960-09-19 Method of treating filament yarn
JP41049463A JPS4818148B1 (pt) 1959-05-18 1966-07-29

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US813902A US3024516A (en) 1959-05-18 1959-05-18 Apparatus for treating filament yarn
US56983A US3024517A (en) 1959-05-18 1960-09-19 Method of treating filament yarn

Publications (1)

Publication Number Publication Date
US3024517A true US3024517A (en) 1962-03-13

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US56983A Expired - Lifetime US3024517A (en) 1959-05-18 1960-09-19 Method of treating filament yarn

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US (1) US3024517A (pt)
JP (1) JPS4818148B1 (pt)
BE (1) BE590957A (pt)
CH (1) CH424072A (pt)
DE (1) DE1435376A1 (pt)
GB (1) GB905247A (pt)
NL (1) NL251708A (pt)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092890A (en) * 1960-11-21 1963-06-11 Monsanto Chemicals Textured multilobal filament yarn
US3112551A (en) * 1958-12-31 1963-12-03 Hoechst Ag Process for the manufacture of crimped filament yarns
US3137911A (en) * 1961-01-03 1964-06-23 Monsanto Co Apparatus for treating filament yarn
US3184822A (en) * 1962-08-15 1965-05-25 Shaw Gilbert Method for manufacture of spatulated fibre
US3192597A (en) * 1963-08-21 1965-07-06 Monsanto Co Yarn texturing apparatus and method
US3204319A (en) * 1963-03-25 1965-09-07 Monsanto Co Apparatus for texturizing yarn
US3212157A (en) * 1961-11-29 1965-10-19 Klinger Mfg Co Ltd Yarn crimping apparatus
US3213171A (en) * 1959-05-01 1965-10-19 Du Pont Process of producing spontaneously crimpable filaments from asymmetrically quenched and drawn fiber-forming polymers
US3235442A (en) * 1962-07-30 1966-02-15 Du Pont Crimped tow of polyester filaments
US3257702A (en) * 1965-03-10 1966-06-28 Sutures Inc Method of fabricating pliable braided polyfilamentous threads
US3268971A (en) * 1962-12-19 1966-08-30 Bancroft & Sons Co J Electro-mechanical apparatus for crimping yarn or the like
US3298079A (en) * 1965-05-24 1967-01-17 Eastman Kodak Co Method for producing a novel crimped yarn and fabric
US3299485A (en) * 1963-08-21 1967-01-24 Monsanto Co Yarn texturing process
US3417446A (en) * 1965-11-16 1968-12-24 Ici Ltd Method and apparatus of gear crimp
US3541198A (en) * 1963-12-07 1970-11-17 Keizo Ueda Process for manufacturing composite filaments
US3686723A (en) * 1970-11-13 1972-08-29 Ici Ltd Gears for crimping yarn
US3768128A (en) * 1970-04-03 1973-10-30 Heathcoat & Co Ltd Apparatus for crimping yarn
US3833976A (en) * 1972-12-20 1974-09-10 Du Pont Process for texturing yarn by gear crimping
CN103707390A (zh) * 2013-12-20 2014-04-09 厦门大学 一种陶瓷弹簧成型装置与陶瓷弹簧的制备方法
CN103991226A (zh) * 2013-08-08 2014-08-20 常州同维佳业新材料科技有限公司 一种涂覆竹节纱加工方法

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JPS5974492U (ja) * 1982-11-05 1984-05-21 株式会社山武 室内形センサの放熱構造
JPS5974491U (ja) * 1982-11-05 1984-05-21 株式会社山武 室内形湿度センサの構造
JPS5974494U (ja) * 1982-11-05 1984-05-21 株式会社山武 室内形センサの断熱構造
JPS5983298A (ja) * 1982-11-05 1984-05-14 株式会社山武 室内形センサの断熱構造
CN101068959A (zh) * 2004-12-04 2007-11-07 苏拉有限及两合公司 用于引导丝束的装置
CN102586913A (zh) * 2012-03-19 2012-07-18 江苏宝德新材料有限公司 一种水洗机
JP6952470B2 (ja) * 2017-02-02 2021-10-20 日機装株式会社 中空糸膜クリンプ付与装置及び中空糸膜クリンプ付与方法
CN113529217B (zh) * 2021-06-23 2022-05-17 无锡长江精密纺织有限公司 一种可加热的牵伸辊及其环锭纺细纱机
CN113502576B (zh) * 2021-08-17 2022-08-02 安徽东锦资源再生科技有限公司 再生聚酯短纤的环保型卷曲装置及其方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068139A (en) * 1933-08-01 1937-01-19 Kronheim Jacob Machine for making stuffing for furniture
US2326174A (en) * 1939-04-22 1943-08-10 Rutishauser Georg Method and apparatus for the production of curled threads from cellulose acetate
US2348182A (en) * 1938-08-04 1944-05-02 Owens Corning Fiberglass Corp Apparatus for producing fibrous glass
US2385894A (en) * 1944-04-12 1945-10-02 American Viscose Corp Handling filamentary materials
GB780755A (en) * 1954-11-19 1957-08-07 Ici Ltd Manufacture of artificial filaments, yarns and fibres
US2977746A (en) * 1958-06-09 1961-04-04 Deering Milliken Res Corp Apparatus for processing thermoplastic yarns

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068139A (en) * 1933-08-01 1937-01-19 Kronheim Jacob Machine for making stuffing for furniture
US2348182A (en) * 1938-08-04 1944-05-02 Owens Corning Fiberglass Corp Apparatus for producing fibrous glass
US2326174A (en) * 1939-04-22 1943-08-10 Rutishauser Georg Method and apparatus for the production of curled threads from cellulose acetate
US2385894A (en) * 1944-04-12 1945-10-02 American Viscose Corp Handling filamentary materials
GB780755A (en) * 1954-11-19 1957-08-07 Ici Ltd Manufacture of artificial filaments, yarns and fibres
US2977746A (en) * 1958-06-09 1961-04-04 Deering Milliken Res Corp Apparatus for processing thermoplastic yarns

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112551A (en) * 1958-12-31 1963-12-03 Hoechst Ag Process for the manufacture of crimped filament yarns
US3213171A (en) * 1959-05-01 1965-10-19 Du Pont Process of producing spontaneously crimpable filaments from asymmetrically quenched and drawn fiber-forming polymers
US3092890A (en) * 1960-11-21 1963-06-11 Monsanto Chemicals Textured multilobal filament yarn
US3137911A (en) * 1961-01-03 1964-06-23 Monsanto Co Apparatus for treating filament yarn
US3212157A (en) * 1961-11-29 1965-10-19 Klinger Mfg Co Ltd Yarn crimping apparatus
US3235442A (en) * 1962-07-30 1966-02-15 Du Pont Crimped tow of polyester filaments
US3184822A (en) * 1962-08-15 1965-05-25 Shaw Gilbert Method for manufacture of spatulated fibre
US3268971A (en) * 1962-12-19 1966-08-30 Bancroft & Sons Co J Electro-mechanical apparatus for crimping yarn or the like
US3204319A (en) * 1963-03-25 1965-09-07 Monsanto Co Apparatus for texturizing yarn
US3192597A (en) * 1963-08-21 1965-07-06 Monsanto Co Yarn texturing apparatus and method
US3299485A (en) * 1963-08-21 1967-01-24 Monsanto Co Yarn texturing process
US3541198A (en) * 1963-12-07 1970-11-17 Keizo Ueda Process for manufacturing composite filaments
US3257702A (en) * 1965-03-10 1966-06-28 Sutures Inc Method of fabricating pliable braided polyfilamentous threads
US3298079A (en) * 1965-05-24 1967-01-17 Eastman Kodak Co Method for producing a novel crimped yarn and fabric
US3417446A (en) * 1965-11-16 1968-12-24 Ici Ltd Method and apparatus of gear crimp
US3768128A (en) * 1970-04-03 1973-10-30 Heathcoat & Co Ltd Apparatus for crimping yarn
US3686723A (en) * 1970-11-13 1972-08-29 Ici Ltd Gears for crimping yarn
US3833976A (en) * 1972-12-20 1974-09-10 Du Pont Process for texturing yarn by gear crimping
CN103991226A (zh) * 2013-08-08 2014-08-20 常州同维佳业新材料科技有限公司 一种涂覆竹节纱加工方法
CN103707390A (zh) * 2013-12-20 2014-04-09 厦门大学 一种陶瓷弹簧成型装置与陶瓷弹簧的制备方法
CN103707390B (zh) * 2013-12-20 2015-11-11 厦门大学 一种陶瓷弹簧成型装置与陶瓷弹簧的制备方法

Also Published As

Publication number Publication date
JPS4818148B1 (pt) 1973-06-04
NL251708A (pt)
BE590957A (pt)
GB905247A (en) 1962-09-05
DE1435376A1 (de) 1970-01-15
CH424072A (fr) 1966-11-15

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