US2591243A - Process for the manufacture of rayon from viscose with high elongation and spooling in centrifugal cups - Google Patents

Process for the manufacture of rayon from viscose with high elongation and spooling in centrifugal cups Download PDF

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Publication number
US2591243A
US2591243A US168674A US16867450A US2591243A US 2591243 A US2591243 A US 2591243A US 168674 A US168674 A US 168674A US 16867450 A US16867450 A US 16867450A US 2591243 A US2591243 A US 2591243A
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US
United States
Prior art keywords
filament
spooling
rayon
centrifugal
viscose
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
Application number
US168674A
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English (en)
Inventor
Drisch Nicolas
Brepson Roland
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.)
TEXTILE and CHEM RES CO Ltd
TEXTILE AND CHEMICAL RESEARCH Co Ltd
Original Assignee
TEXTILE and CHEM RES CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TEXTILE and CHEM RES CO Ltd filed Critical TEXTILE and CHEM RES CO Ltd
Application granted granted Critical
Publication of US2591243A publication Critical patent/US2591243A/en
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Expired - Lifetime legal-status Critical Current

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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
    • D02J1/229—Relaxing
    • 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
    • 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
    • D01D7/00—Collecting the newly-spun products
    • D01D7/02—Collecting the newly-spun products in centrifugal spinning pots
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose

Definitions

  • This invention relates to the spooling of rayon.
  • the manufacture of rayon from viscose the
  • the thread leaving the bath passes over at leastone feed roller which delivers it at a definite speed, e. g. of the order of 60 to 100 meters per minute or more, whereupon the filament passes through a funnel into a rapidly revolving centrifugal cup. Owing to its mass, the filament is flung radially against the internal wall of the cup, and is wound up upon this wall.
  • the funnel performs suitable vertical reciproeating movements, as a result of which the lament and to transformation of the cakes into secondary spoolings. the internal tensions referred to may prove prejudicial to proper formation of cakes and hence to the scientific mass production of rayon by these methods.
  • the present invention provides a process for obtaining dense, perfectly uniform and heavy ment is' wound in intersecting helicoid spirals.
  • the rapid rotation of the cup produces a torsion in the filament, the value of which depends in principle on the linear speed of the lament and the number of turns in the cup.
  • the magnitude of the centrifugal force exerted upon the filament depends on the speed of rotation of the cup. the mass of the filament, and the radial travel of the filament between the end of the funnel and the internal surface of the cake in Si".
  • filament cakes e. g. 500, ⁇ to 600 grams, in conventional centrifugal cups.
  • This process is characterized by an extreme enlargement of the travel of the filament without stretching tension betweenthe point where the filament reaches the last feed roller and the spinning funnel, such that the duration of this travel becomes at least 3 seconds.
  • the invention also provides an apparatus for fabricating rayon filament and spooling the same in a centrifugal cup, such apparatus representing an improvement relative to the previous processes and being characterized by comprising means for substantially enlarging the travel under non-stretching tension between the last feed roller or rollers and the funnel.
  • the travel between the point where the lament reaches the last feed roller and the funnel may, in pursuance to the invention, be increased three-, five-, or ten-fold, and more. This travel must be increased as the linear speed of the suitable travel for a linear speed of meters, at least 13.50 meters are required for a linear speed of 100 meters/min. so that the time required for the filament to cover the distance between the last feed roller and the funnel will be at least 3 seconds as aforesaid. ,y
  • the process may be applied with special advantage to spinning in baths containing more than 50% of sulfuric acid.
  • the congelation of the viscose filament in a bath of at least 55% sulfuric acid is followed by subjection to extreme stretching in the presence of such acid acting as a plastifler, or alternatively in a secondary bath e. g. on an aqueous base at C. minimum. whereupon the filament is kept under non- If e. g. ten meters is the Y three seconds.
  • stretching tension between the last feed roller and the spooling means for a duration of at least This travel may include the time in the Wash bath.
  • filaments are obtained with a tensile strength in grams denier of 4 or 5 and more, with ultimate elongations definitely above those obtained without such prolonged aerial travel, namely of the order of 9 to l instead of 7 to 8 per cent.
  • the knot strength and loop strength are likewise improved by l0 to 20 per cent.
  • the invention is not confined to spooling in centrifuges, the same improvement in certain characteristics of the filament being obtained with any method of spooling, as e. g. on bobbins or spools.
  • Fig. l is a schematic representation of the portion of an apparatus designed in pursuance to the invention included between the feed rollers and the centrifugal cup;
  • Fig. 2 is a schematic representation of an apparatus according to the invention including an acid bath and a wash bath between which the filament is tensioned.
  • filament 3 after passing over the feed rollers l and 2, describes a zig-zag path as it passes over a series of guide means 4, 5, 6, 1 and B, before entering the funnel 9 of the centrifugal cup I0 where the filament is spooled to form a cake H.
  • the guide means 4 to 8 may comprise pins, rollers, reels, etc. whose number may be varied according to the length of travel desired. The travel may be further increased by allowing the filament 3 to describe several helicoid spirals about the roller 2, and thereafter to follow a zig-zag course or any other devious path.
  • the spinneret 2l is shown as immersed in a bath 22 containing 975 grams of sulfuric acid per liter and having a temperature of 20 C.
  • the travel through the bath is to 60 centimeters in length.
  • the filament 3 passes over a guide roller 24 and is led over a feed roller 25, whence it proceeds to the final feed roller 2. Between these two rollers, separated by about l meter, the filament 3 is drawn out 200%, reducing the rating' to 300 deniers per thousand strands.
  • the filament describes a certain number of parallel spirals (e. g. 10) ori a roller 2 associated for the purpose with a rod 25 with axis slightly inclined to that of the roller 2, for effecting automatic uniform spacing of the spirals.
  • This winding in several spirals greatly increases cohesion and facilitates uniform drawing.
  • VOne or more Vcomplete spirals may additionally be wound on the roller 25 to 'improve traction on th' .roller also, and reduce slippage.
  • the lament passes through an aqueouswash bath 2l and then over a guide 8, whereupon it goes down through the funnel 9 and iscollected at il in the cup l0.
  • the cup i0 may be replaced by other spooling means, as a bobbin or spool 'if desired.
  • the path of travel between the last feed roller 2 of Fig. 2 through the bath 2l to the funnel is such as to provide the above mentioned three second dwell under non-stretching conditions before spooling.
  • the method of making rayon lament from viscose which comprises feeding the rayon fila.- ment through a coagulating bath without stretching, removing the filament from the coagulating bath, then stretching the filament at a stretchingstation and subsequently holding the stretched filament under non-stretching conditions for a period of at least three seconds while conveying the stretched filament from the stretching station to a winding station so as to allow complete relaxation and relief of internal strains before winding and then winding the said filament.
  • the method of making rayon filament from l viscose which comprises feeding the rayon filament without stretching through a coagulating bath containing at least 55% sulfuric acid, removing the filament from the coagulating bath, then stretching the filament at a stretching station and subsequently holding the stretched filament under non-stretching conditions for a period of atleast three seconds while conveying the stretched filament from the stretching station to a winding station so as to allow complete relaxation and relief of internal strains before winding, and then winding the said filament.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US168674A 1947-04-14 1950-06-17 Process for the manufacture of rayon from viscose with high elongation and spooling in centrifugal cups Expired - Lifetime US2591243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR56757T 1947-04-14

Publications (1)

Publication Number Publication Date
US2591243A true US2591243A (en) 1952-04-01

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US168674A Expired - Lifetime US2591243A (en) 1947-04-14 1950-06-17 Process for the manufacture of rayon from viscose with high elongation and spooling in centrifugal cups

Country Status (6)

Country Link
US (1) US2591243A (no)
BE (1) BE480557A (no)
CH (1) CH282044A (no)
FR (2) FR943103A (no)
GB (1) GB652645A (no)
NL (1) NL76321C (no)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259743A (en) * 1990-08-10 1993-11-09 Glanzstoffe Austria Aktiengesellschaft Spinning machine for wet-spinning process
CN113584615A (zh) * 2021-09-01 2021-11-02 福建永荣锦江股份有限公司 一种共轴驱动离心纺丝卷绕装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE537745A (no) * 1954-04-30 1900-01-01

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE18170E (en) * 1925-06-20 1931-08-25 Leon lilieneeld
US2309072A (en) * 1940-07-29 1943-01-19 Ind Rayon Corp Manufacture of thread or the like
US2348415A (en) * 1941-05-09 1944-05-09 American Enka Corp Manufacture of rayon

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE18170E (en) * 1925-06-20 1931-08-25 Leon lilieneeld
US2309072A (en) * 1940-07-29 1943-01-19 Ind Rayon Corp Manufacture of thread or the like
US2348415A (en) * 1941-05-09 1944-05-09 American Enka Corp Manufacture of rayon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259743A (en) * 1990-08-10 1993-11-09 Glanzstoffe Austria Aktiengesellschaft Spinning machine for wet-spinning process
CN113584615A (zh) * 2021-09-01 2021-11-02 福建永荣锦江股份有限公司 一种共轴驱动离心纺丝卷绕装置

Also Published As

Publication number Publication date
NL76321C (no)
FR943103A (fr) 1949-02-28
GB652645A (en) 1951-04-25
FR56757E (fr) 1952-10-06
BE480557A (no)
CH282044A (fr) 1952-04-15

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