US3796036A - Method of processing yarn - Google Patents

Method of processing yarn Download PDF

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Publication number
US3796036A
US3796036A US00200950A US3796036DA US3796036A US 3796036 A US3796036 A US 3796036A US 00200950 A US00200950 A US 00200950A US 3796036D A US3796036D A US 3796036DA US 3796036 A US3796036 A US 3796036A
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United States
Prior art keywords
yarn
heating zone
heating
temperature
zone
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US00200950A
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English (en)
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W Parker
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Scragg & Sons
Scragg E & Sons Ltd gb
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Scragg & Sons
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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

Definitions

  • the invention comprises a method of processing undrawn or partially drawn multifilament thermoplastic yarn wherein yarn advanced by a feed roller system from a supply source is drawn in a first heating zone adapted to bring the yarn only up to a temperature at which it is in a drawable condition and is then passed, with little or no intervening cooling of the yarn, through a second heating zone, closely .following the first heating zone, in which the yarn is brought up to a heat setting temperature, the yarn then being passed through a cooling zone and a false twisting zone before being passed through a draw-roller system which effects the drawing of the yarn in the first heating zone.
  • the yarn running from the draw-roller system may be passed through a third heating zone'in which the yarn is brought up to a heat setting temperature at an overfeed rate of percent to 40 percent, and thence passes to a winding zone.
  • Apparatus for processing yarn comprises, in sequence, a feed roller system, first yarn heating means adapted to heat a running yarn only up to a temperature at which it is in a drawable condition, second heating means adapted to bring the yarn up to a heat setting temperature and located closely following the first heating means so that preferably there is no intervening cooling zone, false twisting means, and a draw-roller system adapted to effect drawing of the yarn at the first yarn heating means.
  • the apparatus may also comprise third heating means adapted to bring the yarn up to a heat-setting temperature, means for forwarding the yarn through said third heating means at a rate which provides for an overfeed of 10 percent to 40 percent, and a yarn takeup mechanism.
  • the first heating means may comprise a first section of a composite heater blockor tube of which an adjacent second section comprises the second heating means.
  • the first heating means may comprise a heater block or tube closely adjacent a separate second heater block or tube which is the second heating means.
  • the first heating means may be a stationary heated cylindrical pin closely adjacent the end of a heater block or tube which is the second heating means.
  • the first heating means may be a driven heated roller or rollers closely adjacent the input end of the second heating means which may be a heater block or tube.
  • the heated roller or rollers may be driven at a peripheral speed which is equal to or smaller than the speed at which the yarn leaves the roller or rollers, and which is greater than but preferably equal to or smaller than the speed at which the yarn approaches the roller or rollers.
  • the driven heated roller or that located nearest to the second heater when more than one heated roller is employed, may be spaced from the second heater the least possible distance.
  • FIG. 1 is a schemetic layout diagram of a false twist crimping machine provided with second-stage heating.
  • FIGS. 2 to 5 are fragmentary diagrams illustrating alternative forms of yarn heaters usable in the machine shown in FIG. 1.
  • drawableyarn 10 in the sense that it is completely undrawn or is only partially drawn and capable of substantial further drawing, is taken from a supply bobbin 11 as by a feed-roller system 12, and to a first yarn heating means 13 indicated wholly diagrammatically since it can be of many suitable forms, some of which are described below.
  • the first heating means 13 provides a first heating zone in which the temperature-controlled heater 13 brings the yarn up to a temperature at which it is in a drawable condition, a suitable temperature for polyester yarns being l15C, preferably approximately C.
  • the yarn then passes to a second heating means 14.
  • the second heating means being a heater block as indicated in the drawing, or a heater, of other suitable form, which provides a second heating zone in which the temperature-controlled heating means 14 bringsthe yarn up to a heat setting temperature, a suitable temperature for polyester yarns being C to 200C, preferably approximately C.
  • the yarn passes through a cooling zone Cat least as long as the heater 14 and then through a false twisting means 15, such as a friction twister or a false twist spindle or a fluid-jet twister, from which, as is well-known in the art, twist runs back over the heater 14 and is heat set in the yarn.
  • a false twisting means 15 such as a friction twister or a false twist spindle or a fluid-jet twister, from which, as is well-known in the art, twist runs back over the heater 14 and is heat set in the yarn.
  • the yarn passes through a draw roller system 16 which causes the drawing of the yarn in the first heating zone provided by the first heating means 13, the degree of stretching of the yarn in the first heating zone preferably being in the ratio of 121.5 to 115.5.
  • Yarn leaving the draw roller system 16 could be wound up without further processing, but as shown in FIG. 1, yarn from the draw roller system passes to a third heating means 17 which provides a third heating zone in which the temperature-controlled heating means 17 brings the yarn up to a heat setting temperature, the heat conditions to which the yarn is subjected in'the third heating zone of the heating means 17 preferably being more severe than, or at least as severe as, those to which it is subjected in the second heating zone.
  • the temperature of the third heating zone is higher than than of the second zone, or that the yarn is in the third zone for an equal or longer time than it is in the second zone.
  • the yarn then passes to a further feed-roller system 20, which together with the system 16 provides underfeed or overfeed conditions in the third heating zone, for example an overfeed'rate of 10 percent to 40 percent, the yarn then being wound-up into a package by a wind-up mechanism 19.
  • a further feed-roller system 20 which together with the system 16 provides underfeed or overfeed conditions in the third heating zone, for example an overfeed'rate of 10 percent to 40 percent, the yarn then being wound-up into a package by a wind-up mechanism 19.
  • FIG. 2 is a diagram illustrating that the yarn 21 runs through first and second heating zones provided respectively by first and second adjacent sections 22 and 23 of a composite heater block, which could also be a tubular heater, the two sections preferably having heatinsulation material 24 between them.
  • FIG. 3 is a diagram illustrating that the yarn 31 runs through a first heating zone provided by a first heater block 32, or a tubular heater, and then through a second heating zone provided by a separate second heater block 33, or a tubular heater, which is closely adjacent the first heater block.
  • FIG. 4 is a diagram illustrating that the yarn 41 runs through a first heating zone provided by a stationary heated pin 42, which is closely adjacent the end of a heater block 43, or a tubular heater, providing the second heating zone.
  • the pin 42 is 4 inches in diameter and has a ceramic, satin-chrome or mattchrome surface finish, and the yarn preferably makes an 180 wrap about the pin although FIG. 4 shows a 90 wrap.
  • the pin can have a circumferential yarn guide groove or grooves.
  • the roller 52 is driven to rotate in the yarn travel direction, but at a circumferential speed which is preferably less than, or equal to the speed of the yarn approaching it, so that besides the yarn it provides a degree of relief of yarn tensions in the system upstream the roller 52, according to its speed of rotation.
  • the speed of the roller 52 could also be equal to, or greater or smaller than the speed at which the yarn is leaving the roller.
  • FIG. 6 is a diagram illustrating a modification of FIG. 5, with yarn 61 running through a first heating zone provided by two equal-diameter spaced-apart driven heated rollers 62 about which the yarn is wrapped, the rollers being driven at equal circumferential speeds and preferably at a lower speed which is less than or equal to the speed of travel of the yarn approaching them, or equal to or less than the speed at which the yarn is leaving them, or more than the latter.
  • One roller 62 is closely adjacent the end of a heater block, 63, or a tubular heater, which provides the second heating zone, as is the roller 52 of FIG. 5.
  • All the heaters above referred to are temperaturecontrolled and can be heated electrically or by internal circulation of hot fluid.
  • the process andapparatus according to this invention provide that the yarn is drawn at the most suitable temperature in the first heating zone, with the drawn point beneficially located with precision in the first heating zone, with the result that ther are less tension variations across the false twisting means and the pro Ded yarn is of good quality and uniformity.
  • Method of processing undrawn and partially drawn multifilament thermoplastic yarn comprising the steps of advancing yarn from a source of supply sequentially through a first and a second heating zone; heating the yarn in said first heating zone to only such a temperature which is required to place the yarn in drawable condition; so drawing the yarn that the draw point is located in said first heating zone; heating the drawn .yarn in said second heating zone to a higher heat-setting temperature; cooling the set yarn in a cooling zone downstream of said second heating zone; false-twisting the cooled yarn in a false-twisting zone; and winding up the thus processed yarn.
  • Method as defined in claim 1 further comprising the steps of advancing the yarn at an overfeed rate of substantially 10-40 percent prior to the. step of windin g up, and simultaneously re-heating the yarn to a heatsetting temperature in a third heating zone.
  • step of drawing comprises drawing saidyarn at a draw ratio in the range of 121.5 and 1:5.
  • further heating said yarn in said second heating zone comprises subjecting the yarn to a temperature of about 175C.
  • said yarn being a polyester yarn; and wherein the step of heating the yarn in-said first heating zone comprises controlling the temperature in said first heating zone within the range of substantially 90C to C.
  • step of further heating the yarn in said second heating zone comprises controlling the temperature in said second heating zone within the range of substantially C to 200C.
  • Method as defined in claim 1, wherein the step of drawing comprises drawing said yarn at a draw ratio in the range of 1:1.5 and 1:5.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00200950A 1970-11-21 1971-11-22 Method of processing yarn Expired - Lifetime US3796036A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5549370 1970-11-21

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US3796036A true US3796036A (en) 1974-03-12

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US00200950A Expired - Lifetime US3796036A (en) 1970-11-21 1971-11-22 Method of processing yarn

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US (1) US3796036A (enExample)
CA (1) CA954681A (enExample)
CH (1) CH533184A (enExample)
DE (1) DE2157663A1 (enExample)
FR (1) FR2115878A5 (enExample)
GB (1) GB1350588A (enExample)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903682A (en) * 1973-01-29 1975-09-09 Roannais De Const Textiles Soc Apparatus for initiating operation of a combined drawing and texturing machine for yarn
US3910027A (en) * 1972-12-05 1975-10-07 Bayer Ag Process for the simultaneous stretch texturing of filament yarn
US3932986A (en) * 1974-03-08 1976-01-20 Mitsubishi Rayon Co., Ltd. Method for manufacturing a textured synthetic multifilament yarn having alternately grouped S and Z twists
US3956878A (en) * 1974-09-10 1976-05-18 Fiber Industries, Inc. High speed texturing
US3971200A (en) * 1974-03-06 1976-07-27 Leesona Corporation Process and apparatus for continuous heat setting of carpet yarns
US3977175A (en) * 1973-12-13 1976-08-31 Teijin Limited Draw-texturing polyester yarns
US4028875A (en) * 1975-03-13 1977-06-14 Monsanto Company False-twist texturing process
US4081948A (en) * 1976-02-17 1978-04-04 Ernest Scragg & Sons Limited Manufacture of bulked yarn
US4110964A (en) * 1973-05-01 1978-09-05 Monsanto Company Draw texturizing process
US4115985A (en) * 1976-07-12 1978-09-26 Asa S.A. Method of apparatus for the thermal treatment of textiles articles
US4120141A (en) * 1976-08-02 1978-10-17 The State Of Israel Ministry Of Commerce And Industry Process and apparatus for the production of textured polyester yarn
US4138840A (en) * 1974-10-18 1979-02-13 Imperial Chemical Industries Limited Heat transfer
US4173860A (en) * 1975-03-03 1979-11-13 Mcklveen John R Textured synthetic fiber yarn and process for making same
US4263778A (en) * 1978-06-13 1981-04-28 Fiber Industries, Inc. Stabilized stretch yarns for stretch wovens
US4534164A (en) * 1982-03-16 1985-08-13 Teijin Limited Textured yarn and method and apparatus for producing the same

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863280A (en) * 1952-05-23 1958-12-09 Ubbelohde Leo Method of crimping filaments
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US3022565A (en) * 1958-09-04 1962-02-27 Chemstrand Corp Method of texturing yarns
US3094834A (en) * 1959-07-03 1963-06-25 British Nylon Spinners Ltd Apparatus for simultaneously stretching and falsetwisting yarn
US3313011A (en) * 1963-10-14 1967-04-11 Celanese Corp Method of texturing triacetate yarn
US3381461A (en) * 1962-11-20 1968-05-07 Scragg & Sons Textile processes and machines
US3404525A (en) * 1965-09-10 1968-10-08 Ici Ltd Low-torque multifilament compact yarn
US3488940A (en) * 1965-07-16 1970-01-13 Ici Ltd Process for yarn crimping
US3498043A (en) * 1968-10-01 1970-03-03 Celanese Corp Method of texturing yarn
US3533146A (en) * 1967-08-31 1970-10-13 Heberlein Patent Corp Heating system for yarns and threads
US3535866A (en) * 1968-02-29 1970-10-27 Nippon Rayon Kk Process and apparatus for producing crimped yarns

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863280A (en) * 1952-05-23 1958-12-09 Ubbelohde Leo Method of crimping filaments
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US3022565A (en) * 1958-09-04 1962-02-27 Chemstrand Corp Method of texturing yarns
US3094834A (en) * 1959-07-03 1963-06-25 British Nylon Spinners Ltd Apparatus for simultaneously stretching and falsetwisting yarn
US3381461A (en) * 1962-11-20 1968-05-07 Scragg & Sons Textile processes and machines
US3313011A (en) * 1963-10-14 1967-04-11 Celanese Corp Method of texturing triacetate yarn
US3488940A (en) * 1965-07-16 1970-01-13 Ici Ltd Process for yarn crimping
US3404525A (en) * 1965-09-10 1968-10-08 Ici Ltd Low-torque multifilament compact yarn
US3533146A (en) * 1967-08-31 1970-10-13 Heberlein Patent Corp Heating system for yarns and threads
US3535866A (en) * 1968-02-29 1970-10-27 Nippon Rayon Kk Process and apparatus for producing crimped yarns
US3498043A (en) * 1968-10-01 1970-03-03 Celanese Corp Method of texturing yarn

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910027A (en) * 1972-12-05 1975-10-07 Bayer Ag Process for the simultaneous stretch texturing of filament yarn
US3903682A (en) * 1973-01-29 1975-09-09 Roannais De Const Textiles Soc Apparatus for initiating operation of a combined drawing and texturing machine for yarn
US4110964A (en) * 1973-05-01 1978-09-05 Monsanto Company Draw texturizing process
US3977175A (en) * 1973-12-13 1976-08-31 Teijin Limited Draw-texturing polyester yarns
US3971200A (en) * 1974-03-06 1976-07-27 Leesona Corporation Process and apparatus for continuous heat setting of carpet yarns
US3932986A (en) * 1974-03-08 1976-01-20 Mitsubishi Rayon Co., Ltd. Method for manufacturing a textured synthetic multifilament yarn having alternately grouped S and Z twists
US3956878A (en) * 1974-09-10 1976-05-18 Fiber Industries, Inc. High speed texturing
US4138840A (en) * 1974-10-18 1979-02-13 Imperial Chemical Industries Limited Heat transfer
US4173860A (en) * 1975-03-03 1979-11-13 Mcklveen John R Textured synthetic fiber yarn and process for making same
US4028875A (en) * 1975-03-13 1977-06-14 Monsanto Company False-twist texturing process
US4081948A (en) * 1976-02-17 1978-04-04 Ernest Scragg & Sons Limited Manufacture of bulked yarn
US4115985A (en) * 1976-07-12 1978-09-26 Asa S.A. Method of apparatus for the thermal treatment of textiles articles
US4120141A (en) * 1976-08-02 1978-10-17 The State Of Israel Ministry Of Commerce And Industry Process and apparatus for the production of textured polyester yarn
US4263778A (en) * 1978-06-13 1981-04-28 Fiber Industries, Inc. Stabilized stretch yarns for stretch wovens
US4534164A (en) * 1982-03-16 1985-08-13 Teijin Limited Textured yarn and method and apparatus for producing the same

Also Published As

Publication number Publication date
CH533184A (de) 1973-01-31
CA954681A (en) 1974-09-17
GB1350588A (en) 1974-04-18
DE2157663A1 (de) 1972-06-08
FR2115878A5 (enExample) 1972-07-07

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