US3522698A - Apparatus for the treatment of freshly spun spandex thread - Google Patents

Apparatus for the treatment of freshly spun spandex thread Download PDF

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Publication number
US3522698A
US3522698A US734438A US3522698DA US3522698A US 3522698 A US3522698 A US 3522698A US 734438 A US734438 A US 734438A US 3522698D A US3522698D A US 3522698DA US 3522698 A US3522698 A US 3522698A
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United States
Prior art keywords
thread
cowl
reel
annular
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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US734438A
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English (en)
Inventor
Harry Keith Barker
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.)
Akzo Nobel UK PLC
Original Assignee
Courtaulds PLC
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Publication date
Application filed by Courtaulds PLC filed Critical Courtaulds PLC
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    • 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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D01D10/0454—Supporting filaments or the like during their treatment while in continuous movement using reels
    • 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
    • D01D11/00—Other features of manufacture
    • D01D11/04—Fixed guides

Definitions

  • 57-77.4 7 Claims ABSTRACT OF THE DISCLOSURE Apparatus for the treatment of a freshly-spun spandex multifilament thread comprising a rotatable thread-advancing device, for example a thread-advancing reel, a cowl mounted at the end of the device from which the thread is advanced and rotatable with the device, the cowl encircling the device at that end and presenting an annular smooth surface for contacting a thread which is passing onto the device when the device and cowl are rotating, so as to twist the thread, and a thread guide located between the cowl and the device for maintaining the thread in running contact with the smooth surface of the cowl.
  • the thread guide may be a curved rod which extends into the space between the cowl and the thread advancing device.
  • This invention relates to the production of artificial fibres and is particularly concerned with the production of spandex filaments by a process in which a precursor of the spandex filament, that is to say a polyesteror a polyether-polyisocyanate reaction product, is extruded through a multi-hole spinning jet into a coagulating bath containing a poly-functional reagent, for example a diamine such as ethylene diamine, which is capable of reacting with the precursor to form filaments of the spandex type.
  • a precursor of the spandex filament that is to say a polyesteror a polyether-polyisocyanate reaction product
  • the freshly-formed filaments after they have been withdrawn from the coagulating bath require further processing for example to allow the reaction to go to completion and to wash off excess reagents; one or more stretching steps may also be introduced during the processing stages.
  • Such processing may conveniently be effected while the filaments are passed over a series of thread advancing devices such as reels or rollers and drying of the final washed product may also be accomplished on a heated thread-advancing device. It is usually so arranged that, during the processing, the filaments fuse together to form an effective monofilament.
  • apparatus for the treatment of a freshly-spun spandex multifilament thread comprises a rotatable thread-advancing device, a cowl mounted at the end of the device from which the thread is advanced and rotatable with the device, the cowl encircling the device at that end and presenting an annular smooth surface for contacting a thread which is passing onto the device when the device and cowl are rotating, so as to twist the thread, and a thread guide located between the cowl and the device for maintaining the thread in running contact with the smooth surface of the cowl.
  • the thread-advancing device may with advantage be a thread-advancing reel, and the thread guide for maintaining the thread in running contact with the cowl may conveniently take the form of a curved rod extending into the space between the reel and the cowl, being curved so as to extend substantially degrees around the reel.
  • an auxiliary guide may be included to prevent the thread from being carried over onto the peripheral surface of the cowl but we prefer that the cowl has an annular bevel adjacent to the annular smooth surface and radially outwardly of it.
  • a further bevel, radially inwardly of the smooth annular surface may also be provided so as to minimise any tendency for the thread to be flattened as it passes from that surface towards the thread guide.
  • a process for the production of a multifilament spandex thread comprises extruding a solution of a precursor of the spandex filament into a coagulating bath which is capable of reacting with the precursor to form filaments of the spandex type, withdrawing the thread upwardly from the bath onto a rotating thread-advancing device by way of a smooth annular surface on a cowl which is mounted at the end of the thread advancing device from which the thread is advanced and rotatable with the device, so that the thread is twisted, in which the thread is passed around a guide located between the cowl and the threadadvancing device so as to maintain the thread in contact with the smooth annular surface of the cowl.
  • FIG. 1 is a schematic end elevation of the apparatus
  • FIG. 2 is a schematic side elevation of the apparatus.
  • a thread-advancing reel 1 has a cowl 2 at the end from which the thread is advanced.
  • the cowl 2 incorporates a smooth annular surface 3 against which a thread 4 is contacted before it is taken up on the reel.
  • Between the cowl 2 and the reel 1 is a curved rod 5 which maintains the thread 4 in contact with the smooth annular surface 3.
  • the curved rod 5 is supported at one end by a mounting assembly 6 which is attached to the spinning machine (not shown).
  • the reel 1 and the cowl 2 are mounted on a shaft 7 which in turn is mounted on, and rotated by, the spinning machine.
  • the smooth annular surface 3 is bevelled radially outwardly as shown at 8 and radially inwardly as shown at 9.
  • the arrows indicate the direction of rotation of the reel 1 and cowl 2, and the direction of travel of the thread 4.
  • the polymer was extruded into a bath of percent by weight of ethylene diamine in isopropyl alcohol at C.
  • the jet had holes of 0.1016 mm. diameter and was 9.5 mms. below the bath surface, and excess spin bath was scraped from the thread by passing it through a guide consisting of two inclined ceramic rods about 2 to 8 cms. above the bath surface.
  • the thread was wound at 44 metres/minute onto a thread-advancing reel after first being twisted by the cowl and guide assembly as described above with reference to the drawing. The thread was allowed to dwell on the reel for about 1 minute to complete the fixing and fusing of the thread.
  • the thread was then stretched 85 percent onto a second reel where it was washed for 1 minute with hot water, and washing was continued on further reels.
  • the thread then passed to a drying reel where the imparted stretch was heat-set for about 2 minutes, and then the thread was allowed to relax onto the take-up package.
  • the extent to which the cross-section approaches a true circle can be conveniently expressed as the Flatness ratio (i.e. the ratio of the longest and shortest axis across the cross-sectional shape).
  • a high figure for flatness ratio means a flat yarn whilst a figure of 1 would represent a completely circular yarn.
  • Apparatus for the treatment of a freshly-spun spandex multifilament thread comprising a rotatable threadadvancing device, a cowl mounted at the end of the device from which the thread is advanced and rotatable with the device, the cowl encircling the device at that end and presenting an annular smooth surface for contacting a thread which is passing onto the device when the device and cowl are rotating, so as to twist the thread, and a thread guide located between the cowl and the device for maintaining the thread in running contact with the smooth surface of the cowl.
  • annular smooth surface of the cowl is in a plane which is substantially at right angles to the axis of rotation of the cowl.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US734438A 1967-06-15 1968-06-04 Apparatus for the treatment of freshly spun spandex thread Expired - Lifetime US3522698A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27678/67A GB1219913A (en) 1967-06-15 1967-06-15 Improvements relating to the production of artificial fibres

Publications (1)

Publication Number Publication Date
US3522698A true US3522698A (en) 1970-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US734438A Expired - Lifetime US3522698A (en) 1967-06-15 1968-06-04 Apparatus for the treatment of freshly spun spandex thread

Country Status (6)

Country Link
US (1) US3522698A (cs)
BE (1) BE716599A (cs)
DE (1) DE1760625A1 (cs)
FR (1) FR1605236A (cs)
GB (1) GB1219913A (cs)
NL (1) NL6808448A (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668853A (en) * 1969-06-20 1972-06-13 Kugelfischer G Schaefer & Co Friction crimping of synthetic threads

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988867A (en) * 1960-02-26 1961-06-20 Ind Rayon Corp Method of handling a plurality of yarns during processing
US3091075A (en) * 1962-01-22 1963-05-28 Mohasco Ind Inc Paper yarn apparatus
US3094834A (en) * 1959-07-03 1963-06-25 British Nylon Spinners Ltd Apparatus for simultaneously stretching and falsetwisting yarn
US3156084A (en) * 1960-05-02 1964-11-10 Res Nv False twist device
US3296786A (en) * 1964-11-06 1967-01-10 Turbo Machine Co Apparatus for processing a twisted bulky yarn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094834A (en) * 1959-07-03 1963-06-25 British Nylon Spinners Ltd Apparatus for simultaneously stretching and falsetwisting yarn
US2988867A (en) * 1960-02-26 1961-06-20 Ind Rayon Corp Method of handling a plurality of yarns during processing
US3156084A (en) * 1960-05-02 1964-11-10 Res Nv False twist device
US3091075A (en) * 1962-01-22 1963-05-28 Mohasco Ind Inc Paper yarn apparatus
US3296786A (en) * 1964-11-06 1967-01-10 Turbo Machine Co Apparatus for processing a twisted bulky yarn

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668853A (en) * 1969-06-20 1972-06-13 Kugelfischer G Schaefer & Co Friction crimping of synthetic threads

Also Published As

Publication number Publication date
GB1219913A (en) 1971-01-20
NL6808448A (cs) 1968-12-16
FR1605236A (cs) 1973-08-31
BE716599A (cs) 1968-11-04
DE1760625A1 (de) 1972-01-05

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