US2920346A - Thread stretching device for wet spinning more particularly of viscose rayon - Google Patents

Thread stretching device for wet spinning more particularly of viscose rayon Download PDF

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Publication number
US2920346A
US2920346A US713395A US71339558A US2920346A US 2920346 A US2920346 A US 2920346A US 713395 A US713395 A US 713395A US 71339558 A US71339558 A US 71339558A US 2920346 A US2920346 A US 2920346A
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US
United States
Prior art keywords
thread
stretching
cell
viscose rayon
wet spinning
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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US713395A
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English (en)
Inventor
Jori Luciano
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Individual
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Individual
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Publication date
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Publication of US2920346A publication Critical patent/US2920346A/en
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Classifications

    • 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
    • D02J1/223—Stretching in a liquid bath

Definitions

  • a considerable quantity of salts is formed, more particularly at the thread inlet into the stretching channel, as well as along the thread path, this salt formation being detrimental for the continuity of the elementary filaments forming the thread, giving rise to a hairy appearance.
  • the cross-sectional area of thecell is preferably of elliptical shape of variable height. The greatest height is at the gas discharge opening.
  • Nozzles for the inlet and outlet of the thread are provided at both cell ends and serve at the same time as two outlets for the stretch-assisting bath from the cell proper.
  • the two nozzles are not free, each nozzle being arranged within a small chamber. An opening is bored in this chamber'in front of the nozzle for the inlet and outlet of the thread respectively, at the bottom of the small chamber an outlet for the bath being bored.
  • Figure 1 is a diagrammatic view of a continuous wet spinning machine
  • Figure 2 is a longitudinal vertical sectional view of a stretching cell
  • Figure 3 is a detail on a large scale of Figure 2;
  • Figure 4 is a cross-sectional view on line IVIV of Figure 2, and V Figure 5 shows the roller arrangement with vertical axes.
  • 1 denotes the spinning nozzle or spinneret immersed in the coagulating bath
  • 2 is the thread extruded from the spinneret
  • 3 the first stretching roller
  • 5 the second stretching roller having a vertical axis of rotation.
  • the thread 2 issuing from the spinneret 1 submerged in the coagulating bath is wound in one or more turns on the first roller 3, runs through the cell 4 and is wound in one or more turns on the roller 5 whence it is conveyed to further treatments.
  • FIG 2 which shows the stretching cell on an enlarged scale
  • 10 denotes an elongated cell casing with 0 end chambers 11, 11', of high moisture content.
  • 12 and 12 denote the two nozzles aligned with the thread inlet and outlet holes 13, 13'; 14 denoting the inlet fitting for This is extremely advantageous, inasthe bath, 15 and 15 the outlets for the bath from the chambers 11, 11' and 16 the gas outlet from the top of the cell 10.
  • the salts cannot crystallize in the two high moisture chambers 11, 11, so that the nozzles are kept clean and the thread is not damaged by incrustations which would be unavoidable in the absence of the small chambers 11, 11'.
  • Viscose is prepared to a concentration of 7% cellulose with a 6.5% NaOH content, viscosity 30", gamma No. 50.
  • Figure 5 shows a set of rollers 5 having vertical axes of rotation. It will be seen how the threads 2 from the individual rollers that is from the spinnerets are drawn together to be conveyed towards a washing equipment without any further deflection through the conventional guide stick 20. Thread guides 22 may be arranged on the guide stick 20.
  • a finger 21 is employed, the axis of which is inclined to the roller axis or, alternately, is formed with grooves.
  • a wet-spinning and stretching apparatus comprising in combination a spinneret immersed in a coagulating bath, a pair of horizontally spaced stretching rollers arranged out of the bath for receiving a thread extruded from the spinneret, and a stretching cell interposed between the stretching rollers, the said cell comprising a horizontally elongated casing of a substantially elliptical cross-section traversed lengthwise by the thread section comprised between the stretching rollers, an inlet for a stretch-assisting liquid at a bottom section of the casing, an outlet for gaseous decomposition products at a top section of the casing, a nozzle at each end of the casing through which the thread can enter and respectively leave the casing and through which the liquid can discharge from the casing, a liquid discharge opening in a bottom section of each collector chamber, and an aperture in a wall section of each chamber facing the respective nozzle, the aperture being aligned with the nozzles whereby the thread can enter and leave the casing passing through the respective chamber
  • the stretching roller at the entrance to the cell having a horizontal axis
  • the stretching roller at the exit from the cell having vertical axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US713395A 1957-08-09 1958-02-05 Thread stretching device for wet spinning more particularly of viscose rayon Expired - Lifetime US2920346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT846520X 1957-08-09

Publications (1)

Publication Number Publication Date
US2920346A true US2920346A (en) 1960-01-12

Family

ID=11325342

Family Applications (1)

Application Number Title Priority Date Filing Date
US713395A Expired - Lifetime US2920346A (en) 1957-08-09 1958-02-05 Thread stretching device for wet spinning more particularly of viscose rayon

Country Status (5)

Country Link
US (1) US2920346A (it)
BE (1) BE564563A (it)
DE (1) DE1195898B (it)
FR (1) FR1191154A (it)
GB (1) GB846520A (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067461A (en) * 1960-11-07 1962-12-11 Monsanto Chemicals Apparatus for producing twisted filament yarn
US4100660A (en) * 1976-09-29 1978-07-18 Bayer Aktiengesellschaft Apparatus for the heat treatment of running threads by means of saturated steam
US4198835A (en) * 1978-01-26 1980-04-22 Heberlein Maschinenfabrik Ag Device relating to heater units for the heat-treatment of textile yarns
US4217323A (en) * 1977-01-27 1980-08-12 John Heathcoat & Company Limited Heating and drawing of synthetic filaments
US4477951A (en) * 1978-12-15 1984-10-23 Fiber Associates, Inc. Viscose rayon spinning machine
US5714172A (en) * 1994-05-26 1998-02-03 Lenzing Aktiengesellschaft Spinning device with movable joint

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2228272A (en) * 1938-02-23 1941-01-14 Celanese Corp Treatment of filaments or threads
US2317448A (en) * 1938-01-05 1943-04-27 Celanese Corp Apparatus for treatment of artificial materials
US2450045A (en) * 1942-07-11 1948-09-28 Celanese Corp Apparatus for the treatment of textile strands

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH187673A (fr) * 1935-04-09 1936-11-30 Dreyfus Henry Installation pour améliorer la résistance à la traction de produits artificiels à base de dérivés de cellulose.
GB679182A (en) * 1949-02-22 1952-09-17 Courtaulds Ltd Improvements in and relating to the production of artificial threads from viscose
AT179840B (de) * 1949-09-23 1954-10-11 Algemene Kunstzijde Unie Nv Vorrichtung zur kontinuierlichen Herstellung und Nachbehandlung künstlicher Fäden
US2708843A (en) * 1950-08-10 1955-05-24 Chemstrand Corp Fluid treating apparatus for strands

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2317448A (en) * 1938-01-05 1943-04-27 Celanese Corp Apparatus for treatment of artificial materials
US2228272A (en) * 1938-02-23 1941-01-14 Celanese Corp Treatment of filaments or threads
US2450045A (en) * 1942-07-11 1948-09-28 Celanese Corp Apparatus for the treatment of textile strands

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067461A (en) * 1960-11-07 1962-12-11 Monsanto Chemicals Apparatus for producing twisted filament yarn
US4100660A (en) * 1976-09-29 1978-07-18 Bayer Aktiengesellschaft Apparatus for the heat treatment of running threads by means of saturated steam
US4217323A (en) * 1977-01-27 1980-08-12 John Heathcoat & Company Limited Heating and drawing of synthetic filaments
US4198835A (en) * 1978-01-26 1980-04-22 Heberlein Maschinenfabrik Ag Device relating to heater units for the heat-treatment of textile yarns
US4477951A (en) * 1978-12-15 1984-10-23 Fiber Associates, Inc. Viscose rayon spinning machine
US5714172A (en) * 1994-05-26 1998-02-03 Lenzing Aktiengesellschaft Spinning device with movable joint

Also Published As

Publication number Publication date
FR1191154A (fr) 1959-10-16
DE1195898B (de) 1965-07-01
GB846520A (en) 1960-08-31
BE564563A (it)

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