EP0032067A1 - Procédé de texturation par jet d'air pour la production de fil en polyester à rétrécissement restreint - Google Patents

Procédé de texturation par jet d'air pour la production de fil en polyester à rétrécissement restreint Download PDF

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Publication number
EP0032067A1
EP0032067A1 EP19800304778 EP80304778A EP0032067A1 EP 0032067 A1 EP0032067 A1 EP 0032067A1 EP 19800304778 EP19800304778 EP 19800304778 EP 80304778 A EP80304778 A EP 80304778A EP 0032067 A1 EP0032067 A1 EP 0032067A1
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EP
European Patent Office
Prior art keywords
yarn
jet
textured
air jet
dtex
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19800304778
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German (de)
English (en)
Inventor
Ralph Carl Wirsig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DuPont Canada Inc
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DuPont Canada Inc
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Filing date
Publication date
Application filed by DuPont Canada Inc filed Critical DuPont Canada Inc
Publication of EP0032067A1 publication Critical patent/EP0032067A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • D02G1/168—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam including drawing or stretching on the same machine

Definitions

  • This invention relates to the production of air jet-textured bulked polyester yarn from spin-oriented polyester yarn and more particularly to the production of such air jet-textured yarn having a low dry heat shrinkage.
  • spin-oriented polyester yarn means such yarn prepared by melt-spinning polyethylene terephthalate into yarn while withdrawing the yarn from the spinneret at a take-off speed of 3000 to 4000 yards/minute (2740 to 3660 metres/minute) as described by Gorrafa in United States Patent No. 3 973 386 issued 1976 August 10.
  • Dry heat shrinkage as used herein are obtained by (a) suspending a weight from a skein of yarn to produce a 0.1 g/denier (0.0883 dN/tex) load on the yarn and measuring its length (L . ), (b) replacing the weight by a lighter weight generating a 0.005 g/denier (0.00441 dN/tex) load and placing the loaded yarn in an oven at 250 + 5°F (121 + 2.8°C) for 5 minutes, (c) removing the yarn, cooling it to room temperature, loading it again with the original weight, and recording its new length (L f ), and (d) calculating the shrinkage as follows:
  • a prior art process for producing air jet-textured yarn from spin-oriented polyester yarn involves the following steps: (a) hot-drawing the spin-oriented polyester yarn e.g. over a heated draw pin at a draw ratio in the range of from 1.3 to 2.0; (b) feeding the yarn to an air jet at 10% to 40% overfeed; (c) jet-texturing the yarn with the air jet; (d) drawing the jet-textured yarn at a draw ratio of 1.04 to 1.12 to reduce the size of large loops produced during the jet-texturing step; (e) post-heating the jet-textured yarn; and (f) winding up the resulting jet-textured yarn.
  • the jet-textured polyester yarn produced by the above prior art process has a relatively high dry heat shrinkage e.g. about 4.1% to about 4.5% for 400 dtex to 600 dtex yarn; about 4.8% to about 6.4% for 800 dtex to 1200 d tex yarn; and even higher for yarn above 1200 dtex. While such dry heat shrinkages are satisfactory in many end uses for the jet-textured polyester yarn, they are a disadvantage when it is desired to use the yarn for applications which require yarns having lower dry heat shrinkages.
  • jet-textured yarns may be produced which have significantly lower dry heat shrinkages e.g. about 2.2% to about 2.8% for 4 00 dtex to 600 dtex yarn; about 3.1% to about 3.5% for 800 dtex to 1200 dtex yarn; and about 3.5% to about 3.9% for 1200 dtex to 2000 dtex yarn.
  • the present invention provides a process for producing an air jet-textured polyester yarn having a low dry heat shrinkage, the process comprising the steps of: (a) cold drawing a spin-oriented polyester yarn at a draw ratio in the range of from 1.3 to 2.0; (b) preheating the drawn yarn at substantially constant yarn length; (c) feeding the yarn to an air jet at a 10% to 40% overfeed; (d) jet-texturing the yarn with the air jet; (e) drawing the jet-textured yarn at a draw ratio of 1.04 to 1.12; and (f) winding up the resulting jet-textured yarn.
  • overfeed to the air jet as used herein means:
  • a step of post-heating the jet-textured yarn is included between step (e) and step (f).
  • the step of preheating the drawn yarn and the step of post-heating the jet-textured yarn are each carried out on a contact heater plate operating at a surface temperature in the range of from 180°C to 220°C.
  • the yarn is fed to the air jet at a 20% to 30% overfeed.
  • the jet-textured yarn is drawn at a draw ratio of 1.06 to 1.10.
  • the step of preheating the drawn yarn and the step of post-heating the jet-textured yarn are each carried out on the surface of a contact heater plate operating at a surface temperature in the range of from 205°C to 215°C.
  • the yarn is fed to the air jet at a 23% to 27% overfeed.
  • the spin-oriented polyester yarn is cold drawn at a draw ratio of from 1.6 to 1.8.
  • the cold drawing step is carried out at a draw ratio of from 1.6 to 1.8 on a draw roll operating at a surface speed_of at least 375 metres/minute and the resulting air jet-textured yarn has a linear density in the range of from 400 dtex to 600 dtex and has a dry heat shrinkage in the range of from about 2.2% to about 2.8%.
  • the cold drawing step is carried out at a draw ratio of from 1.6 to 1.8 on a draw roll operating at a surface speed of at least 375 metres/minute and the resulting air jet-textured yarn has a linear density in the range of from 600 dtex to 1200 dtex and has a dry heat shrinkage in the range of from about 2.8% to about 3.5%.
  • the cold drawing step is carried out at a draw ratio of from 1.6 to 1.8 on a draw roll operating at a surface speed of at least 375 metres/minute and the resulting air jet-textured yarn has a linear density in the range of from 1200 dtex to 2000 dtex and has a dry heat shrinkage in the range of from about 3.5% to about 3.9%.
  • the cold drawing step is carried out at a draw ratio of from 1.6 to 1.8 on a draw roll operating at a surface speed of at least 240 metres/minute and the resulting air jet-textured yarn has a linear density in the range of from 2000 dtex to 3500 dtex and has a dry heat shrinkage of less than about 3.0%.
  • spin-oriented polyester yarn 10 is pulled from a supply package 11 over a yarn guide 12 by feed roll assembly 13, comprising a feed roll 14, a cot roll 15 and a separator roll 16.
  • Yarn 10 is passed about cot roll 15 and separator roll 16 for a plurality of wraps.
  • From the feed roll assembly 13 the yarn 10 passes to a draw roll assembly 17, comprising draw roll 18 - and separator roll 19.
  • the yarn 10 is passed about draw roll 18 and separator roll 19 for a plurality of wraps.
  • Draw roll assembly 17 runs at a faster speed than feed roll assembly 13 to draw the yarn at a draw ratio in the range of from 1.3 to 2.0 and preferably in the range of from 1.6 to 1.8.
  • the drawn yarn passes over a heater plate 20, which operates at a temperature in the range of from 180°C to 220°C and preferably in the range of from 205°C to 215°C, to roll assembly 21, comprising driven roll 22 and separator roll 23.
  • the drawn yarn is passed about driven roll 22 and separator roll 23 for a plurality of wraps.
  • roll assembly 21 runs at the same speed as draw roll assembly 17.
  • the yarn passes over yarn guide 24 under guide pin 25 which is immersed in a bath 26 containing water at room temperature. It then passes over yarn guide 27, through air jet bulking device 28, to roll assembly 29, comprising driven roll 30 and separator roll 31.
  • the jet-textured yarn is passed about driven roll 30 and separator roll 31 for a plurality of wraps.
  • the air jet bulking device 28 produces crunodal surface loops.
  • a preferred jet is disclosed by Agers in United States Patent No. 4 157 605 issued 1979 June 12 (see particularly Figures 6 and 7).
  • the yarn is immersed in water bath 26 in order to improve the efficiency of air jet bulking device 28.
  • Water bath 26 and air jet bulking device 28 may both be placed in an enclosed air jet-texturing chest as disclosed by Wirsig in European Patent Application No. A 0 004 781 published 1979 October 17.
  • the overfeed of yarn to the jet which may be determined by
  • the range of from 10% to 40% may be set as desired in the range of from 10% to 40%, but is preferably in the range of from 20% to 30%, especially in the range of from 23% to 27%.
  • the jet-textured yarn passes to draw roll assembly 32, comprising draw roll 33 and separator roll 34.
  • the jet-textured yarn is passed about draw roll 33 and separator roll 34 for a plurality of wraps.
  • Draw roll assembly 32 runs at a faster speed than roll assembly 29 to draw the jet-textured yarn at a draw ratio in the range of from 1.04 to 1.12 and preferably in the range of from 1.06 to 1.10. This post drawing step tends to reduce the number of large and poorly formed crunodal surface loops produced by the air jet bulking device 28 and hence to improve the handling characteristics of the jet-textured yarn.
  • the jet-textured yarn passes over a heater plate 35, which operates at a temperature in the range of from 180°C to 220°C and preferably in the range of from 205°C to 215°C, to roll assembly 36, comprising driven roll 37 and separator roll 38.
  • the jet-textured yarn is passed about driven roll 37 and separator roll 38 for a plurality of wraps.
  • roll assembly 36 runs at the same speed as draw roll assembly 32. This post-heating step at substantially constant yarn length tends to reduce the size of the surface loops and to improve the stability of the jet-textured yarn.
  • stability means a measure of the load carrying capacity of the jet-textured yarn before the loops begin to straighten out throughout the yarn bundle.
  • the post-heating step may be omitted if it is desired to produce jet-textured yarn having larger surface loops.
  • the jet-textured yarn is wound up on package 39.
  • the apparatus for carrying out the process shown schematically in the drawing and described above may be provided on two adjacent positions of a conventional draw twister e.g. a Model 14S drawtwister manufactured by Zinser Textilmaschinen GmbH by making the following modifications:
  • feed roll assembly 13 comprises the feed roll assembly of the first position
  • draw roll assembly 17 comprises the larger diameter roll of the stepped draw roll of the first position and its associated separator roll
  • heater plate 20 comprises the heater plate added above the draw roll of the first position
  • roll assembly 21 also comprises the larger diameter roll of the stepped draw roll of the first position and its associated separator roll
  • water pan 26 and air jet bulking device 28 are contained in the jet-texturing chest added above the draw roll of the second position
  • roll assembly 29 comprises the smaller diameter roll of the stepped draw roll of the second position and the separator roll of the second position
  • draw roll assembly 32 comprises the smaller diameter roll of the stepped draw roll of the first position and its associated separator roll
  • heater plate 35 also comprises the heater plate added above the draw roll of the first position
  • roll assembly 36 also comprises the smaller diameter roll of the stepped draw roll of the first position and its associated separator roll.
  • a composite 590 dtex, 68 filament, spin-oriented polyester yarn was cold drawn in a drawing zone, preheated on a heater plate, jet-textured with an air jet, drawn in a post drawing zone, post-heated on a heater plate and wound up on a package.
  • the spin-oriented polyester yarn had been prepared by melt spinning polyethylene terephthalate into yarn while withdrawing the yarn from the spinneret at 3110 metres/minute.
  • the apparatus used which is shown schematically in the drawing, was provided on two adjacent positions of a Model 14S drawtwister (manufactured by Zinser Textilmaschinen GmbH) by making the modifications described hereinabove.
  • the air jet bulking device 28 was substantially the same as that shown in Figures 6 and 7 of aforementioned United States Patent No.
  • the feed rate of spin-oriented polyester yarn 10 provided by feed roll assembly 13 was 237 metres/minute.
  • Heater plate 20, which was 63.5 cm in 237 length, was operated at a temperature of 210 * C and roll assembly 21 was operated at 391 metres/minute so that the yarn was preheated at constant length.
  • Air jet 28 was operated with an air pressure of 1146 kPa (150 psig).
  • Roll assembly 29 was operated at a speed of 312.8 metres/minute so that the overfeed of the yarn to the air jet 28 was
  • Draw roll assembly 32 was operated at a speed of 336.3 metres/minute so that the jet-textured yarn was drawn at a draw ratio of
  • Heater plate 35 which was 63.5 cm in length, was operated at a temperature of 210°C and roll assembly 36 was operated at a speed of 336.3 metres/minute so that the jet-textured yarn was post-heated at constant length.
  • the jet-textured yarn was wound up on a surface driven package 39 by a driver roll (not shown).
  • the surface speed of the driver roll was 344 metres/minute; however, slippage between the driver roll and the package 39 may have occurred.
  • the linear density of the air jet-textured yarn on package 39 was found to be 404.0 dtex and the dry heat shrinkage thereof (obtained by the method described hereinbefore) was found to be 2.19%.
  • a composite 885 dtex, 102 filament, spin-oriented polyester yarn was treated on the same apparatus and in the same manner as the yarn in Example 1.
  • the spin-oriented polyester yarn had been prepared under the same conditions as that of Example I.
  • the linear density of the resulting jet-textured polyester yarn on package 39 was found to be 600.5 dtex and the dry heat shrinkage thereof was found to be 2.86%.
  • a composite l180 dtex, 136 filament, spin-oriented polyester yarn was treated on the same apparatus and in the same manner as the yarn in Example I.
  • the spin-oriented polyester yarn had been prepared under the same conditions as that of Example I.
  • the linear density of the resulting jet-textured polyester yarn on package 39 was found to be 802.8 dtex and the dry heat shrinkage thereof was found to be 3.06%.
  • a composite 1770 dtex, 204 filament, spin-oriented polyester yarn was treated on the same apparatus and in the same manner as the yarn in Example I.
  • the spin-oriented polyester yarn had been prepared under the same conditions as that of Example I.
  • the linear density of the resulting jet-textured polyester yarn on package 39 was found to be 1209.5 dtex and the dry heat shrinkage thereof was found to be 3.52%.
  • a composite 2950 dtex, 340 filament, spin-oriented polyester yarn was treated on the same apparatus and in the same manner as the yarn in Example I.
  • the spin-oriented polyester yarn had been prepared under the same conditions as that of Example I.
  • the linear density of the resulting jet-textured polyester yarn on package 39 was found to be 2014.5 dtex and the dry heat shrinkage thereof was found to be 3.85%.
  • a composite 4720 dtex, 544 filament, spin-oriented polyester yarn was treated on the same apparatus and in the same manner as that of Example I except that the operating yarn speeds were slower.
  • the spin-oriented polyester yarn had been prepared under the same conditions as that of Example I.
  • the feed rate of spin-oriented polyester yarn 10 provided by feed roll assembly 13 was 146.5 metres/minute.
  • Draw roll assembly 32 was operated at a speed 216.7 metres/minute so that the jet-textured yarn was drawn at a draw ratio of Roll assembly 36 was operated at a speed of 216.7 metres/minute so that the jet-textured yarn was post-heated at constant length.
  • the jet-textured yarn was wound up on a surface driven package 39 by a driver roll (not shown).
  • the surface speed of the driver roll was 230 metres/minute; however, slippage between the driver roll and the package 39 may have occurred.
  • the linear density of the air jet-textured yarn on package 39 was found to be 3206 dtex and the dry heat shrinkage thereof (obtained by the method described hereinbefore) was found to be 2.68%.
  • EXAMPLE VI was repeated with the exception that heater plate 35 and roll assembly 36 were not utilized i.e. the jet-textured yarn was wound up on package 39 directly from draw roll assembly 32.
  • the linear density of the air jet-textured yarn on package 39 was found to be 3242 dtex and the dry heat shrinkage thereof was found to be 2.57%.
  • the comparative figures for EXAMPLE VI were a linear density of 3206 dtex and a dry heat shrinkage of 2.68%.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
EP19800304778 1980-01-07 1980-12-31 Procédé de texturation par jet d'air pour la production de fil en polyester à rétrécissement restreint Withdrawn EP0032067A1 (fr)

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GB8000428 1980-01-07
GB8000428 1980-01-07

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EP0032067A1 true EP0032067A1 (fr) 1981-07-15

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EP (1) EP0032067A1 (fr)
JP (1) JPS56101928A (fr)
CA (1) CA1148728A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165558A (en) * 1984-09-25 1986-04-16 Mettler Soehne Maschf Processing a thread or the like made of synthetic fibers
EP0373519A2 (fr) * 1988-12-13 1990-06-20 Barmag Ag Procédé de fabrication d'un fil texturé par jet d'air
GB2334971A (en) * 1998-03-03 1999-09-08 Heberlein Fibertechnology Inc Method of finishing a yarn
DE4004721C2 (de) * 1988-12-13 2002-09-26 Staehle Gmbh H Verfahren zur Herstellung eines lufttexturierten Fadens

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680301A (en) * 1970-09-23 1972-08-01 Rhodiaceta Textured polyethylene terephthalate yarns
CH547879A (de) * 1970-12-31 1974-04-11 Platt International Ltd Texturierungsverfahren zur herstellung von garn aus synthetischen endlosfaeden und vorrichtung zur durchfuehrung dieses verfahrens.
FR2278807A1 (fr) * 1974-06-21 1976-02-13 Rhone Poulenc Textile Procede et dispositif pour l'obtention de fils textures
US3973386A (en) * 1974-08-14 1976-08-10 E. I. Du Pont De Nemours And Company Process for texturing polyester yarn
GB2043718A (en) * 1979-03-08 1980-10-08 Du Pont Bulky continuous filament yarn and method for making

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680301A (en) * 1970-09-23 1972-08-01 Rhodiaceta Textured polyethylene terephthalate yarns
CH547879A (de) * 1970-12-31 1974-04-11 Platt International Ltd Texturierungsverfahren zur herstellung von garn aus synthetischen endlosfaeden und vorrichtung zur durchfuehrung dieses verfahrens.
FR2278807A1 (fr) * 1974-06-21 1976-02-13 Rhone Poulenc Textile Procede et dispositif pour l'obtention de fils textures
US3973386A (en) * 1974-08-14 1976-08-10 E. I. Du Pont De Nemours And Company Process for texturing polyester yarn
GB2043718A (en) * 1979-03-08 1980-10-08 Du Pont Bulky continuous filament yarn and method for making

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165558A (en) * 1984-09-25 1986-04-16 Mettler Soehne Maschf Processing a thread or the like made of synthetic fibers
EP0373519A2 (fr) * 1988-12-13 1990-06-20 Barmag Ag Procédé de fabrication d'un fil texturé par jet d'air
EP0373519A3 (en) * 1988-12-13 1990-10-31 Barmag Ag Method for making a yarn textured by an air jet
US5054174A (en) * 1988-12-13 1991-10-08 Barmag Ag Method of producing an air textured yarn
DE4004721C2 (de) * 1988-12-13 2002-09-26 Staehle Gmbh H Verfahren zur Herstellung eines lufttexturierten Fadens
GB2334971A (en) * 1998-03-03 1999-09-08 Heberlein Fibertechnology Inc Method of finishing a yarn

Also Published As

Publication number Publication date
CA1148728A (fr) 1983-06-28
JPS56101928A (en) 1981-08-14

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