US2898629A - Apparatus for the production of high tenacity viscose rayon yarn - Google Patents

Apparatus for the production of high tenacity viscose rayon yarn Download PDF

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Publication number
US2898629A
US2898629A US647560A US64756057A US2898629A US 2898629 A US2898629 A US 2898629A US 647560 A US647560 A US 647560A US 64756057 A US64756057 A US 64756057A US 2898629 A US2898629 A US 2898629A
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United States
Prior art keywords
spinning
spinbath
tray
yarn
tube
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Expired - Lifetime
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US647560A
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English (en)
Inventor
Gee Bob De
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Akzona Inc
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American Enka Corp
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Publication date
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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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods

Definitions

  • the yarn may be e initially subjected to the treating liquidiin the spinbath cose is extruded into a bath containing sulfuric acid,
  • the yarns With the regeneration beingretarded, the yarns remain in a plastic state longer which enables the yarn to be subsequently treated in a variety of ways heretofore not possible, such as imparting an even greater stretchto the yarn.
  • rayon yarn of the extra high tenacity type may be produced.
  • viscose modifiers include polyalkoxy glycols or their reaction products with certain amines, alcohols, fatty acids and aromatic acids, certain aliphatic or aromatic monoamines, diamines and polyarnines, certain quaternary ammonium compounds or heterocyclic bases, certain monocarbarnates or dithiocarbamates, and others; i
  • the yarn may remain in a tender stage for a longer period of time than in ordinary viscose, spinning. And, accordingly the need of protecting the tender yarn for a longer period arises.
  • the yarn With the regeneration process being retarded, the yarn is very sensitive to break and rupture. Also, the spinning speed of the yarn must be greatly reduced if theordinar-y I viscose spinning apparatus is used. In many instances, the reduction of speed is so great that the cost of pro duction increases to such an. extent that the cost of high tenacity viscose yarn may be no longer competitive. 1
  • viscose rayon spinning apparatus represents a tremendous financial investment and may not be conveniently altered without incurring a great expense.
  • An object ofthe present invention is to provide a new" and improved tube spinning assembly for the spinning of viscose rayon yarn of enhanced physical properties at a relatively high spinning speed.
  • Another object of the present invention is to provide a new and improved tube spinning assembly for removing from the spinbathviscose rayon yarn which has not been completely regenerated andwhich is still sensitive to transverse forces.
  • Still another object t oaccomplish the above objects without greatly. modifying the ordinary spinning machine employed by the viscose rayon industry. c
  • the objects are accomplished by extruding viscose through a spin: neret into a conventional spinning trough containing a coagulationregeneration liquid, directing the yarn and spinbath liquid through a spinning tube mounted adjacent to and concentric with the spinneret, discharging the spin bath liquid and yarn into an inner container of spinbath liquid and thereafter separating the liquid and yarn.
  • the velocity of the liquid moving co-currently with the threads is diminished practically to a standstill at which point the yarn and liquid are separated.
  • The. direction of yarn travel from the spinneret to the point of separation from spinbath is preferably inclined, upwardly and generally in a straight line. The process maybe carried out while,
  • Figure l is a diagrammatic view of a section taken.
  • Figure 2 is a plan view of one spinning point, showing a preferred embodiment of the invention with the tube spinning assembly being angular-1y positioned in a spinning trough.
  • reference numeral 1 represents an elongated spinning. trough which contains coagulating-regenerating liquidfreferred to herein as spinbath. anddesignated generally by. number 2.
  • a spinning assembly comprisingran upwardly inclined two-diameter spinning tube 3, adjacent to and concentric with a spinneret 4, said tube 3 extending into an inner spinning tray, designated generally with reference number 5.
  • the spinning assembly should be arranged so that the spinning tube is upwardly inclined. Also, in this manner the present invention may be conveniently adapted for use in'conventional spinning machines.
  • a viscose solution is pumped'to and through spinneret 4. 'Theidirection of the flow of viscose is shown by arrow 6; As the viscose is extruded through the spinneret'4, it coagulates. and forms threads 7 which are directed into and through the spinning tube 3.
  • the spinning tube 3 preferably made from glass, consists of a narrowportion 8 and a wide portion 9 'connected by a frusto-.conical portion 10.
  • the tube 3 is snugly held by supporting bracket 11 but is conveniently removabletherefrom.
  • the free end of the wide tube portion 9 passes through an .opening in the wall'12 of tray in a liquid tight manner.
  • the sealing may be affected by means of a washer made from any flexible, resilient, acid resistant material arranged between the tube and the edge of the openingjin'the wall 12 in a known manner and therefore not further indicated in this description. tube and tray is preferred.
  • the threads 7 are in an extremely tender stage and aremoved with a minimum tension through the narrow tube portion 8 by the spinbath 2 flowing rapidly in a co-current direction with the yarn.
  • the threads Upon entering the wide tube portion 9, the threads are partially re-v generated and are spread out in a manner which enables a more intimate contact of the individual threads with thenow weaker spinbath liquid.
  • the liquid moves at aslower velocity and more tension is required to pull the threads therethrough.
  • the yarn may be subjected to a greater longitudinal tensioning inasmuch as the threads have become regenerated'to a greater degree.
  • the inner spinning tray 5, supported within trough 1 in any known manner, is an open topvcontainer defined by walls 12, 13, 14 and 15, which extend above the level of the liquid in spinning trough 1.
  • the walls may form an integral part of the trough or may be separate therefrom as shown in Figure 2.
  • tray 5 The interior of tray 5 is divided into upper and lowe compartments by a false bottom 16, which is perforated as at 17 -and which is secured to the walls'of the tray above the tray bottom 18. Discharge opening is provided-in tray bottom '18 for draining the lower compartment.
  • the false bottom 16 is curved in an upward directionto form a wide overflow edge 20 which is parallel toand spaced from wall 13 but sealed to walls'll2,
  • Pipe-22 provides a confined passageway between opening19 to its frusto-conical end 23 and fits with a correspondingly constructed outlet opening 24-located on'the b0tt0m'-0fth' spinning trough. In order 'toillustrate this, they tray-5 in- Figure 1 is' shown in'a' somewhat raised position.
  • a' pair of 'freelyrotatable threadjguiding rollers27 and 28 is mounted nearer the overflow edge 20 with roller 27 contiguous to the top level of the spinbath in reservoir 21.
  • the liquid level in the spinning trough 1 preferably may be maintained slightly higher than the liquid level lH.I6S6IVOll' 21 as shown in Figure 1. This difference in levels assists the flow of they liquid through spinning tube 3.
  • the rayon threads 7 after. leaving the tube 3 are directed through the liquid in reservoir 21.
  • the threads 7 travel through the spinbath liquid entirely in a straight line.
  • the individual threads never change their direction before they are withdrawn from .the liquid at which point the stream of spinbath liquid has :substantiallycome to a standstill.
  • a most importantrfeature of the present invention is the absence ofturbulence of the spinbath liquid at the point where the threads are removed.
  • a preferred embodiment of the present invention contemplates a. plurality. -of perforations in the false bottom of the inner tray. In this. way the excess liquid leavesthe reservoir through a multitude of passageways whichdeereases .the agitation of the liquid in the tnay to a minimum. A more gradual and uniform carrying off of the spinbath liquid out of'the tray is attained. In this manner the:filaments are exposed to the small est. possible transverse. forces inasmuch as the yarn is guided out of; the. liquid only afterthe, flow of liquid has almost come to a. standstill.
  • Figure 2 shows the spinning assembly disposed in a diagonal position in the spinbath trough. This positioning maybepreferred in order to arrange the most assemblies in a troughof givenzdimensions.
  • the simplicity of construction of thewspinning .tube .With the tray connectedtathereto enables adapting the usual spinning: machines to q tube-spinning .without radical modifications since a plurality of tubes with. a. corresponding number .of; traysmay.xbe:easily.:placed in the ordinary elongated spinning troughvand removed therefrom.
  • a grate maybef arranged above the overflow edge to preventthreads -from goingthereover when the threads:are first spun-in.-
  • the parts of the-apparatus" that come in contact with the spinbath are made of material that is chemically resistant to the spinbath, ,such; as lead.
  • Apparatus for producing viscose rayon yarn comprising a spinning trough containing a spinbath, a spinneret mounted within said trough, a tray positioned within said trough, said tray having walls and a bottom separating the interior thereof from the spinbath in said trough, a curved false bottom mounted in said tray, said false bottom dividing the interior of said tray into upper and lower compartments and providing an overflow edge for draining said upper compartment into said lower compartment, and a treating tube having one end positioned adjacent to and in coaxial alignment with the face of said spinneret and having the opposite end extending into the upper compartment of said tray, said treating tube providing the sole communication for the flow of spinbath from said trough to said tray.
  • Apparatus for producing viscose rayon yarn comprising a spinning trough containing a spinbath, a spinneret mounted within said trough, a tray positioned within said trough, said tray having walls and a bottom separating the interior thereof from the spinbath in said trough, a curved false bottom mounted in said tray, said false bottom dividing the interior of said tray into upper and lower compartments and providing an overflow edge for draining said upper compartment into said lower compartment in order to maintain a level of spinbath in the interior of said tray slightly lower than the level of spinbath in said trough, a treating tube having one end positioned adjacent to and in coaxial alignment with the face of said spinneret and having the opposite end extending into the upper compartment of said tray, said treating tube providing the sole communication for the flow of spinbath from said trough to said tray, and means for discharging spinbath from the lower compartment of said tray to the outside of said trough.
  • Apparatus for producing viscose rayon yarn comprising an elongated spinning trough containing a spinbath, a spinneret mounted within said trough, a tray positioned within said trough, said tray having walls and a bottom separating the interior thereof from the spinbath in said trough, a curved and perforated false bottom mounted within said tray, said false bottom dividing the interior of said tray into upper and lower compartments and providing an overflow edge for draining said upper compartment into said lower compartment in order to maintain a level of spinbath in the interior of said tray slightly lower than the level of spinbath in said trough, a two-diameter treating tube having narrow and wide portions joined by a frustoconical portion, the free end of said narrow portion being positioned adjacent to and in coaxial alignment with the face of said spinneret and the free end of the wide portion extending into said compartment, said treating tube providing the sole communication for the flow of spinbath from said trough to said tray, a discharge pipe for the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
US647560A 1956-04-11 1957-03-21 Apparatus for the production of high tenacity viscose rayon yarn Expired - Lifetime US2898629A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL352091X 1956-04-11

Publications (1)

Publication Number Publication Date
US2898629A true US2898629A (en) 1959-08-11

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ID=19785082

Family Applications (1)

Application Number Title Priority Date Filing Date
US647560A Expired - Lifetime US2898629A (en) 1956-04-11 1957-03-21 Apparatus for the production of high tenacity viscose rayon yarn

Country Status (6)

Country Link
US (1) US2898629A (en, 2012)
BE (1) BE552768A (en, 2012)
CH (1) CH352091A (en, 2012)
DE (1) DE1142986B (en, 2012)
GB (1) GB822940A (en, 2012)
NL (1) NL96619C (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4159299A (en) * 1976-04-06 1979-06-26 Serkov Arkady T Method for the production of rayon
US4744932A (en) * 1985-05-31 1988-05-17 Celanese Corporation Process for forming a skinless hollow fiber of a cellulose ester
EP0178293A3 (en) * 1984-10-09 1988-09-28 Lenzing Aktiengesellschaft Process for the production of cellulose threads and fibres, and device for carrying out the process
CN104032382A (zh) * 2014-06-16 2014-09-10 张家港市港鹰实业有限公司 一种凝固浴槽

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467541A (en) * 1943-07-03 1949-04-19 American Viscose Corp Method and apparatus for spinning artificial filamentous products
US2690663A (en) * 1951-09-15 1954-10-05 American Viscose Corp Apparatus for separating liquid from running strands
US2789315A (en) * 1953-06-26 1957-04-23 American Viscose Corp Wet spinning apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB504132A (en) * 1937-10-25 1939-04-20 Courtaulds Ltd Improvements in and relating to the manufacture and production of artificial threads
FR1006078A (fr) * 1947-11-10 1952-04-18 Comptoir Textiles Artificiels Procédé et dispositif de filature de viscose
US2550808A (en) * 1949-10-25 1951-05-01 Du Pont Coagulating bath circulating eductor
FR1026847A (fr) * 1950-09-08 1953-05-05 Procédé de fabrication de produits filés artificiels
US2659102A (en) * 1951-03-14 1953-11-17 Du Pont Spinning viscose rayon

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2467541A (en) * 1943-07-03 1949-04-19 American Viscose Corp Method and apparatus for spinning artificial filamentous products
US2690663A (en) * 1951-09-15 1954-10-05 American Viscose Corp Apparatus for separating liquid from running strands
US2789315A (en) * 1953-06-26 1957-04-23 American Viscose Corp Wet spinning apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4159299A (en) * 1976-04-06 1979-06-26 Serkov Arkady T Method for the production of rayon
EP0178293A3 (en) * 1984-10-09 1988-09-28 Lenzing Aktiengesellschaft Process for the production of cellulose threads and fibres, and device for carrying out the process
US4744932A (en) * 1985-05-31 1988-05-17 Celanese Corporation Process for forming a skinless hollow fiber of a cellulose ester
CN104032382A (zh) * 2014-06-16 2014-09-10 张家港市港鹰实业有限公司 一种凝固浴槽

Also Published As

Publication number Publication date
NL96619C (en, 2012)
DE1142986B (de) 1963-01-31
BE552768A (en, 2012)
CH352091A (de) 1961-02-15
GB822940A (en) 1959-11-04

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