US3761556A - The manufacture of bulked yarn - Google Patents

The manufacture of bulked yarn Download PDF

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Publication number
US3761556A
US3761556A US00173933A US3761556DA US3761556A US 3761556 A US3761556 A US 3761556A US 00173933 A US00173933 A US 00173933A US 3761556D A US3761556D A US 3761556DA US 3761556 A US3761556 A US 3761556A
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United States
Prior art keywords
yarn
filaments
steam
steaming
treatment
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.)
Expired - Lifetime
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US00173933A
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English (en)
Inventor
D Thom
N Hayman
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.)
Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
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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
    • D02J1/221—Preliminary treatments
    • 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
    • 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
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • D02G1/127—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes including drawing or stretching on the same machine

Definitions

  • ABSTRACT A process for producing a bulked nylon 6.6 filament
  • Foreign Apphcamm' Pnonty Data yarn by the steps of continuously spinning, drawing and Aug. 25, 1970 Great Bl'ltall'l 40,857/70 v in the filaments after melt p g are subjected to a two-stage steaming process, the second [52] Cl 264/210 264/168 264/176 stage of which is for a period of at least 5 seconds main- 264/234 264/290 taining the yarn temperature at at least 55 C and rais- [51] hit.
  • the present invention relates to a process for the manufacture of bulked yarns which comprises melt spinning, drawing and bulking the yarn in a single process, and is especially concerned with the manufacture of bulked polyamide yarns, such as polyhexamethylene adipamide, by this process.
  • Bulked synthetic filament yarns are commonly produced by melt spinning a plurality of filaments which are wound on to a container, stored for some finite period of time, frequently referred to as the lagging" time, subsequently drawn to effect molecular orientation of the filaments, rewound on to a bobbin and finally crimped to impart bulk to the yarn by one of several well known processes.
  • the present invention provides a process for the manufacture of a crimped polyamide yarn in which the spinning, drawing and crimping processes are performed continuously wherein a polyamide is melt extruded into a plurality of undrawn filaments which are cooled and then subjected to the following series of process steps:
  • the yarn is preferably subjected to an intermingling step prior to being would up twist free, for example on a side winder.
  • Theprocess is preferably applied to the formation of a bulked yarn from polyhexamethylene adipamide.
  • the first steam treatment is the conventional steam conditioning process used in the manufacture of multifilament polyhexamethylene adipamide yarns by the melt spinning process.
  • the second steam treatment maintains the yarn at a temperature of at least55 C and raises the moisture content to at least 9 percent. To achieve these effects the yarn is normally required to be treated with steam for at least 5 seconds. For filaments of high decitex longer steam treatments will be required.
  • the steam is preferably saturated but may be superheated, if required, to about C. The use of wet steam should be avoided.
  • the tension in the yarn should be maintained at a level high enough to provide adequate control of the threadline, in the process described hereafter this is achieved by maintaining the tension at at least 0.05 grams/decitex at the start of the treatment, where decitex is the weight of one kilometre of yarn.
  • the yarn having been subjected to the preceding steaming processes may then be drawn in the conventional manner, that is between draw and feed rolls, the draw point being located on a snubbing surface lying therebetween and then crimped by a steam jet process such as that described in British Pat. No. 1,034,418.
  • the crimped yarn so produced has a commercially acceptable degree of bulk.
  • conventional spin finish be applied to the yarn after the first steam treatment and before the yarn is subjected to the longer second steam treatment.
  • the second steaming process further conditions the yarn, since a significant growth in the yarn occurs during such treatment, believed to result from moisture penetrating to the centre of each filament in the yarn.
  • it passes from the steam conditioner over a driven roll to determine the speed of the yarn and then over a second such roll following the second steam treatment, the said second roll rotating at a higher peripheral speed than the first and also acting as a feed roll to the drawing stage.
  • Two bundles of filaments 1 and 2 each of 2000 dtex and having trilobal cross-sections, obtained by melt extrusion of a polyhexamethylene adipamide polymer through spinnerets 3 and 4, are cooled and converged into two threadlines at the throat of steam conditioner 5.
  • the threadlines pass through the conditioner and are then converged into a single yarn at convergence guide 5(a).
  • This yarn then passes over finish applicator 6 to a pair of rolls 7 and 8 round which the yarn makes at least two passes, roll 7 being a driven roll and roll 8 its associated idler roll.
  • two 34-filament bundles of yarn are converged to form two threadlines at the throat of the steam conditioner located 60 inches below the spinneret.
  • the steam conditioner being 4 feet long and fed by an orifice 0.056 inches in diameter connected to an 8 p.s.i.g. steam supply.
  • the two threadlines are converged into a single yarn about 12 inches above the finish applicator.
  • a conventional oil in water finish is applied to the yarn at the rate of 18 ml/min and the yarn then passes four times round the draw roll 7 which rotates at a surface speed of about 985 ft/min.
  • the yarn enters the steaming chamber 13 at a tension of 200 g and is taken l0 times around freely rotating rolls 1] and 12, which are 4.7 feet apart, in a spaced arrangement. A further 12 wraps are then made on a second pair of rolls independent of the first pair but rotating on the same shaft (these rolls not being shown in the drawing).
  • the residence time for the yarn in the steaming chamber is 20 seconds.
  • the steaming chamber is fed with saturated steam through five orifices (three only 14, and 16 being shown) each of which is 0.18 inches in diameter and connected to a saturated steam supply at 50 p.s.i.g.; the steam jets issuing through the orifices are directed on to the yarn.
  • the yarn Emerging from the steaming chamber the yarn is taken to a feed roll 17 rotating at a 7% percent higher speed than the draw roll 7 and thence via snubber pin 19 to the draw roll rotating at a speed of 3,600 ft/min.
  • the yarn being drawn at a draw ratio of 3.65.
  • the yarn From the draw roll the yarn enters the steam bulking apparatus 22 under a tension of not less than 30 g and preferably not less than 35 g where it is subjected to high pressure superheated steam p.s.i.g. 280 C) and is removed by the take-out roll 24 after passing through an air jet 23 which tensions and cools it.
  • the yarn makes a plurality of wraps around the takeout roll and is then wound up on the package 27 after passage through an intermingler jet 26 to form the yarn into a cohesive entity.
  • the wind-up speeds of package 27 is adjusted to give a final yarn tension of about 30
  • the process described above operates satisfactorily with filaments having circular or non-circular crosssections.
  • the starting polymer may contain conventional additives such as pigments, heat and light stabilisers, antistatic agents and dye assistants, etc.
  • a process for the manufacture of a crimped polyamide yarn in which the spinning, drawing and crimping processes are performed continuously, wherein a polyamide is melt extruded into a plurality of undrawn filaments which are cooled and then subjected to the following series of process steps:
  • a process according to claim 1 wherein the polyamide is polyhexamethylene adipamide.
  • a process for the manufacture of a crimped polyamide yarn in which the spinning, drawing and crimping operations are performed simultaneously comprising: melt-extruding a polyamide into a plurality of undrawn filaments; cooling the filaments; steaming the filaments by exposing them to steam for a period of time up to about 0.2 seconds to raise the moisture content of the filaments to about 1 percent;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00173933A 1970-08-25 1971-08-23 The manufacture of bulked yarn Expired - Lifetime US3761556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4085770 1970-08-25

Publications (1)

Publication Number Publication Date
US3761556A true US3761556A (en) 1973-09-25

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ID=10416958

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US00173933A Expired - Lifetime US3761556A (en) 1970-08-25 1971-08-23 The manufacture of bulked yarn

Country Status (7)

Country Link
US (1) US3761556A (enrdf_load_stackoverflow)
JP (1) JPS5144216B1 (enrdf_load_stackoverflow)
AU (1) AU458252B2 (enrdf_load_stackoverflow)
DE (1) DE2142652A1 (enrdf_load_stackoverflow)
GB (1) GB1330847A (enrdf_load_stackoverflow)
NL (1) NL153611B (enrdf_load_stackoverflow)
ZA (1) ZA715620B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123492A (en) * 1975-05-22 1978-10-31 Monsanto Company Nylon 66 spinning process
US4396570A (en) * 1981-05-01 1983-08-02 Allied Corporation Nylon spin-draw process with steam conditioning
US5487860A (en) * 1992-03-30 1996-01-30 Basf Corporation Continuous process for spinning and drawing polyamide and apparatus thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2407499C2 (de) * 1974-02-16 1982-04-08 Phillips Petroleum Co., 74004 Bartlesville, Okla. Verfahren zur Herstellung eines ungezwirntes Garnes aus mehreren Fadenbündeln unterschiedlicher Farbe
DE3173948D1 (en) * 1980-02-18 1986-04-10 Ici Plc Process for forming a continuous filament yarn from a melt spinnable polyethylene terephthalat and novel polyester yarns produced by the process
DE3328477A1 (de) * 1983-08-06 1985-02-21 Neumünstersche Maschinen- und Apparatebau GmbH (Neumag), 2350 Neumünster Verfahren und anordnung zur herstellung eines ungezwirnten kraeuselgarns aus mindestens zwei fadenbuendeln unterschiedlicher farbe oder faerbbarkeit
DE102005020884A1 (de) * 2005-05-04 2006-11-09 Dietze & Schell Maschinenfabrik Gmbh Verfahren und Vorrichtung zur Herstellung von Kunstgras

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1034401A (en) * 1963-04-17 1966-06-29 Snia Viscosa Improvements in or relating to the spinning of synthetic fibres
GB1046298A (en) * 1964-07-09 1966-10-19 British Nylon Spinners Ltd Improvements in or relating to the drawing of synthetic filaments
US3636149A (en) * 1969-12-22 1972-01-18 Ici Ltd Crimping of yarn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1034401A (en) * 1963-04-17 1966-06-29 Snia Viscosa Improvements in or relating to the spinning of synthetic fibres
GB1046298A (en) * 1964-07-09 1966-10-19 British Nylon Spinners Ltd Improvements in or relating to the drawing of synthetic filaments
US3636149A (en) * 1969-12-22 1972-01-18 Ici Ltd Crimping of yarn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123492A (en) * 1975-05-22 1978-10-31 Monsanto Company Nylon 66 spinning process
US4396570A (en) * 1981-05-01 1983-08-02 Allied Corporation Nylon spin-draw process with steam conditioning
US5487860A (en) * 1992-03-30 1996-01-30 Basf Corporation Continuous process for spinning and drawing polyamide and apparatus thereof

Also Published As

Publication number Publication date
NL7111639A (enrdf_load_stackoverflow) 1972-02-29
AU3266971A (en) 1973-03-01
DE2142652A1 (de) 1972-03-02
GB1330847A (en) 1973-09-19
AU458252B2 (en) 1975-02-05
JPS5144216B1 (enrdf_load_stackoverflow) 1976-11-27
NL153611B (nl) 1977-06-15
ZA715620B (en) 1972-04-26

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