US3452129A - Process for the high-speed spinning of viscose filaments - Google Patents

Process for the high-speed spinning of viscose filaments Download PDF

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Publication number
US3452129A
US3452129A US676526A US3452129DA US3452129A US 3452129 A US3452129 A US 3452129A US 676526 A US676526 A US 676526A US 3452129D A US3452129D A US 3452129DA US 3452129 A US3452129 A US 3452129A
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United States
Prior art keywords
viscose
funnel
spinning
filaments
velocity
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Expired - Lifetime
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US676526A
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English (en)
Inventor
Akihiro Isobe
Yutaka Fujinawa
Kogi Iwasaki
Takeshi Ikeda
Eizo Nakajima
Takashi Kobatake
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Asahi Kasei Corp
Asahi Chemical Industry Co Ltd
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Asahi Chemical Industry Co Ltd
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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
    • D01D5/12—Stretch-spinning methods
    • D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
    • 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
    • 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

  • FIG. 3 PROCESS FOR THE HIGH-SPEED SPINNING OF VISCOSE FILAMENTS Filed Oct. 19, 1967 FIG. 2 FIG. I FIG. 3
  • the flow speed of the bath liquid is selected to be substantially equal to or more than that of the downwardly traveling speed of the extruded viscose filaments so as to be in coagulating contact with said filament.
  • rectifier means preferably in the form of metallic gaze, parallel vanes or the like, between the spinneret, the inlet opening of the funnel proper and within the enlarged head chamber, preferably in the form of a closed hopper, formed on top of the funnel for mounting therein said spinneret in a dipped manner.
  • the rectifier is intended to suppress the formation of turbulence in the coagulation bath flow, which provision however leads to a considerable complexity in the design and manufacture of the assembly and resulting in considerable loss in the initial investment.
  • the main object of the present invention is to provide an improved process for viscose spinning which relies upon the funnel spinning principle, yet which is capable of obviating the aforementioned conventional drawbacks.
  • a further object of the invention is to provide the viscose spinning process of the above kind, which is capable of providing superior spun goods at a highly increased spinning velocity and with improved operating efliciency.
  • the spinning velocity is increased to 140-300 meters per min.
  • the characterizing feature of the present invention in its broadest aspect, resides in that the flow velocity of the bath liquid as measured at the straight funnel proper is selected to be lower by 35-80 meters per minute than that of the viscose filaments as measured at the same place in the tube.
  • the inventive high speed viscose spinning process may preferably be carried into effect so as to perfectly suppress the possible occurrence of turbulent bath liquid flow in such a way that the mean flow velocity as measured from the outlet extremity of the extrusion orifices of the spinneret, amounts to 1560 centimeters per minute plus 0.8- 3.0' meters per minute for each increment of 1 millimeter in downward distance from said level within the enlarged head zone above the straight and elongated funnel zone and the dipped length of the extruded, regenerated and coagulating viscose filaments in the overall funnel zone consisting of said both zones is defined by the following formula:
  • Y in centimeters stands for said dipped length of the extruded viscose;
  • X represents in meters per minute the mean spinning velocity of the extruded regenerating viscose.
  • the fluid bath velocity is selected to be lower by 35-80 meters per minute than that of the spinning speed as measured within the elongated straight portion of the funnel.
  • the selection is indeed based upon our experimental observation such that for a fluid velocity difference less than the lower limit of the above specified range there is considerable difliculty in the separation of the spun viscose from the strongly flowing-down bath liquid at the lower end of the funnel due to the intense fluid resistance provided by the bath liquid upon the coagulated filaments, which leads to frequently encountered filament breakage as well as undesirable nap formation, although the fluid resistance of the bath liquid to the gradually coagulating filaments is lesser and the nap formation can be reduced Within the said funnel.
  • the reason for selecting the velocity of the bath liquid at the level of the outlet ends of the extrusion orifices to be -60 centimeters per minute is such that for a lower velocity than the above-specified lower limit, a considerable difficulty will be encountered in the spinning process caused by failure of the accompanying function of the bath liquid with the extruded viscose on account of its buoyancy within the mass of the bath liquid, because the viscose, having a specific gravity of about 1.10, is lighter in its weight than the latter, the specific gravity of which amounts to ca. 1.20-1.45, depending upon its concentration.
  • the velocity increment of the fluid bath liquid per each millimeter distance from the delivery ends of the extrusion orifices is reduced in the initial coagulating bath zone formed within the enlarged funnel head, substantially and preferably shaped into a truncated cone, beyond the above-specified lower limit or 0.8 meter per minute, the extruded viscose could not be accompanied by the flow of the bath liquid, because in this case the flow energy cannot overcome the buoyancy of the viscose.
  • the velocity increment in the above sense is increased to that higher than the above-specified upper limit or 3.0 meters per minute, turbulent flow will take place in the fluid bath, in addition to an excessive tension in the coagulating filaments which may thus be subjected to frequent breakage thereof. These difliculties will make the scheduled viscose spinning very difficult to realize.
  • the fluid bath liquid is led to flow through a spirally guided passage provided at the lower extreme zone of the funnel, thereby the bath liquid being subjected within this zone to a longitudinally elongated swirling motion and thus the spun filaments, upon properly coagulated, being highly accelerated to physically concentrate along the longitudinal axis of said funnel, so as effectively to form a filament bundle.
  • the swirling motion of the bath liquid the latter will diffuse or spread itself abroad as soon as it emerges from the lower end of the funnel and under the influence of the centrifugal force caused by the swirling.
  • the longitudinal or vertical component of the flow energy of the bath liquid is considerably reduced and the deflecting separation of the filament bundle after removal from the lowermost extremity of said funnel will become more easy, because otherwise strongly acting fluid pull upon the bundle may be considerably reduced automatically.
  • FIG. 1 is a longitudinally sectional schematic view of a viscose spinning assembly adapted for carrying out the process according to this invention.
  • FIG. 2 is an enlarged elevational view of a part of FIG. 1, illustrative of the lower end portion of the funnel employed therein.
  • FIG. 3 is a longitudinally sectional view substantially of the funnel head employed in the assembly shown in FIG. 1, wherein, however, some details have been slightly modified.
  • the numeral 1 denotes a vertically extending tube forming a fluid coagulation bath, said funnel, preferably ca. -450 cm. long, having an outside diameter ranging from ca. 3 to 7 mm.
  • the tube or funnel proper 1 is formed along a certain distance at its lower end portion 2 into a threaded or spiral tube part, constituting a swirling zone, the bore size of said funnel naturally depending upon the spinning velocity of the viscose. With increase of this velocity, the tube bore must correspondingly be larger.
  • the spiral angle and the number of spiral pitch must preferably be reduced with increase of the strength of each filament to be spun, as determined by our practical experiments, assuring easier separation thereof from the coagulation bath liquid to be described.
  • an enlarged head chamber which consists of an upper cylindrical part 4 and a cone-shaped part 5,. said chamber being rigidly united at its bottom end with said tube '1, so as to establish a rigid mechanical connection, as well as an intimate fluid communication therebetween.
  • a conventional spinneret 6 projects through the top wall 7 of said chamber 3 into the interior space thereof.
  • said spinneret 6 is formed therein with a number of, say 30, extrusion orifices vertically arranged in parallel to each other.
  • the spinneret 6 is connected through a feed piping 8, only schematically shown by a chain-dotted line, with a proper viscose supply source, such as a metering pump 9, preferably of the gear type, which is further connected with a viscose solution reservoir, preferably a stationary tank, although not shown.
  • a proper viscose supply source such as a metering pump 9 preferably of the gear type, which is further connected with a viscose solution reservoir, preferably a stationary tank, although not shown.
  • a liquid collecting tray 10 in the neighbourhood of which and at a proper distance therefrom, there is further provided a deflector guide 11 which is preferably formed into a rotatable roll, as schematically shown, of the free-rotating type or of the positively driven type, as the case may be.
  • an inlet socket 12 is provided rigidly with the side wall of said chamber, said socket being connected through a supply piping 13 with a coagulation bath liquid source 14 which is preferably in the form of a metering pump, as schematically shown, advantageously of the gear type, the latter being connected further with a reservoir tank, not shown, maintaining therein a mass of said liquid.
  • the piping 13 is shown again only schematically by a chain-dotted line.
  • the threaded tube part 2 is shown in its appearance in FIG. 2 in an enlarged scale for better understanding.
  • the invention may be embodied in other specific forms by same reference numerals as employed in FIGS. 1 and 5 Without departing from the spirit or essential character- 2, yet aflixed each with a suflix a, for better identificaistics thereof.
  • the present examples are therefore to be tion and easy comparison. considered in all respects as illustrative and not restric-
  • the operation of the spinning assembly so far shown tive, the scope of the invention being indicated by the and described will be described in the following by appended claims rather than by the foregoing description, numerical examples. and all changes which come within the meaning and Example range of equivalency of the claims are therefore intended to be embraced therein.
  • properties of spun filaminute for each one millimeter of length of said elongated ments, denier may be as follows: head zone as measured from said orifices to the top of 55 said elongated tube and wherein the overall length of F laments strength, dry -g-/ said bath is defined by the following formula:

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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)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
US676526A 1966-10-21 1967-10-19 Process for the high-speed spinning of viscose filaments Expired - Lifetime US3452129A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9748366 1966-10-21
JP3404867 1967-05-30
JP3404967 1967-05-30

Publications (1)

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US3452129A true US3452129A (en) 1969-06-24

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US (1) US3452129A (de)
CH (1) CH466495A (de)
DE (1) DE1660187A1 (de)
GB (1) GB1130497A (de)
NL (1) NL6714212A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154856A (en) * 1978-03-20 1979-05-15 Standard Oil Company (Indiana) Method for stretching a coagulable extrudate
US4159299A (en) * 1976-04-06 1979-06-26 Serkov Arkady T Method for the production of rayon
US4361532A (en) * 1981-01-09 1982-11-30 Snia Viscosa Societa' Nazionale Industria Applicazioni Viscosa S.P.A. Process for the continuous spinning of viscose rayon
US4910850A (en) * 1983-03-22 1990-03-27 Mitsubishi Rayon Company, Ltd. Method for coagulation of a polymer latex
US5866251A (en) * 1992-10-16 1999-02-02 Eridania Beghin-Say Device and process for the production of fibrious starch materials
CN110886024A (zh) * 2019-11-06 2020-03-17 南京工业职业技术学院 一种制备复合纤维的静电纺丝装置
CN120925176A (zh) * 2025-10-13 2025-11-11 江苏优风环保科技有限公司 一种高效低阻空气过滤材料的制造设备及其制造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004798A1 (de) * 1990-02-16 1991-08-22 Akzo Gmbh Verfahren und vorrichtung zur herstellung von formkoerpern
US5254303A (en) * 1990-02-16 1993-10-19 Akzo N.V. Method and device for manufacturing molded bodies

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1596086A (en) * 1923-11-05 1926-08-17 American Bemberg Corp Process and apparatus for spinning artificial silk
US2027419A (en) * 1931-01-16 1936-01-14 Dreyfus Henry Production of artificial threads, filaments, ribbons, and the like
GB455534A (en) * 1934-11-13 1936-10-22 Wagner Albert Process and apparatus for the production of cuprammonium silk
DE651171C (de) * 1932-07-24 1937-10-08 Wacker Chemie Gmbh Verfahren zur Herstellung wollaehnlicher endloser Fadenbuendel aus Cellulosederivaten oder regenerierter Cellulose nach dem Streckspinnverfahren mit bewegter Faellfluessigkeit
US3049755A (en) * 1959-08-03 1962-08-21 Asahi Chemical Ind Process and apparatus for stretch spinning cuprammonium rayon

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1596086A (en) * 1923-11-05 1926-08-17 American Bemberg Corp Process and apparatus for spinning artificial silk
US2027419A (en) * 1931-01-16 1936-01-14 Dreyfus Henry Production of artificial threads, filaments, ribbons, and the like
DE651171C (de) * 1932-07-24 1937-10-08 Wacker Chemie Gmbh Verfahren zur Herstellung wollaehnlicher endloser Fadenbuendel aus Cellulosederivaten oder regenerierter Cellulose nach dem Streckspinnverfahren mit bewegter Faellfluessigkeit
GB455534A (en) * 1934-11-13 1936-10-22 Wagner Albert Process and apparatus for the production of cuprammonium silk
US3049755A (en) * 1959-08-03 1962-08-21 Asahi Chemical Ind Process and apparatus for stretch spinning cuprammonium rayon

Cited By (8)

* 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
US4154856A (en) * 1978-03-20 1979-05-15 Standard Oil Company (Indiana) Method for stretching a coagulable extrudate
US4361532A (en) * 1981-01-09 1982-11-30 Snia Viscosa Societa' Nazionale Industria Applicazioni Viscosa S.P.A. Process for the continuous spinning of viscose rayon
US4910850A (en) * 1983-03-22 1990-03-27 Mitsubishi Rayon Company, Ltd. Method for coagulation of a polymer latex
US5866251A (en) * 1992-10-16 1999-02-02 Eridania Beghin-Say Device and process for the production of fibrious starch materials
CN110886024A (zh) * 2019-11-06 2020-03-17 南京工业职业技术学院 一种制备复合纤维的静电纺丝装置
CN110886024B (zh) * 2019-11-06 2021-01-01 南京工业职业技术学院 一种制备复合纤维的静电纺丝装置
CN120925176A (zh) * 2025-10-13 2025-11-11 江苏优风环保科技有限公司 一种高效低阻空气过滤材料的制造设备及其制造方法

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Publication number Publication date
NL6714212A (de) 1968-04-22
CH466495A (de) 1968-12-15
DE1660187A1 (de) 1971-03-11
GB1130497A (en) 1968-10-16

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