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WO1999066110A1 - Procede de production de corps moules cellulosiques, notamment de fibres, et dispositif de filage correspondant - Google Patents

Procede de production de corps moules cellulosiques, notamment de fibres, et dispositif de filage correspondant Download PDF

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Publication number
WO1999066110A1
WO1999066110A1 PCT/AT1998/000146 AT9800146W WO9966110A1 WO 1999066110 A1 WO1999066110 A1 WO 1999066110A1 AT 9800146 W AT9800146 W AT 9800146W WO 9966110 A1 WO9966110 A1 WO 9966110A1
Authority
WO
WIPO (PCT)
Prior art keywords
spinning device
spinning
screens
perforated material
particulate material
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.)
Ceased
Application number
PCT/AT1998/000146
Other languages
German (de)
English (en)
Inventor
Wilhelm Feilmair
Franz Schwenninger
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.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
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 Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Priority to AU77502/98A priority Critical patent/AU7750298A/en
Priority to PCT/AT1998/000146 priority patent/WO1999066110A1/fr
Publication of WO1999066110A1 publication Critical patent/WO1999066110A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/10—Filtering or de-aerating the spinning solution or melt
    • D01D1/106—Filtering
    • 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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/06—Distributing spinning solution or melt to spinning nozzles
    • 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

Definitions

  • the invention relates to a process for the production of cellulosic moldings, in particular fibers, in which a solution of cellulose in an aqueous tertiary amine oxide is extruded through a spinneret with spinning holes.
  • the invention further relates to a spinning device.
  • NMMO N-Methylmorpholine-N-oxide
  • Other amine oxides are e.g. in EP-A - 0 553 070.
  • a method of making moldable cellulose solutions is e.g. known from EP-A-0 356 419.
  • the production of cellulosic moldings using tertiary amine oxides is generally referred to as the amine oxide process.
  • EP-A-0 356 419 describes an amine oxide process for the preparation of spinnable cellulose solutions, which as Starting material used a suspension of cellulose in liquid, aqueous N-methylmorpholine-N-oxide (NMMO).
  • NMMO N-methylmorpholine-N-oxide
  • This method consists in the suspension being continuously and continuously converted into a moldable solution in a thin-film treatment apparatus.
  • the moldable solution is then spun into filaments in a molding tool, for example a spinneret, which are passed through a precipitation bath.
  • the object of the invention is therefore to provide a method of the type mentioned at the outset which does not have these disadvantages.
  • the word “immediately” means as close as possible to the spinneret.
  • the word “mixing” means any process by which the flow profile of the spinning mass in the spinning device is influenced immediately before the extrusion.
  • the influencing of the flow of the spinning mass is preferably carried out by pressing the cellulose solution through a perforated material immediately before extrusion.
  • this material must on the one hand be so close to the spinneret that the mixing action extends to the surface of the spinneret, but on the other hand must not be placed on the spinneret in such a way that the extrusion is impaired.
  • the inventors' experiments have shown that the effect according to the invention is most effective when the distance from the spinneret is less than 0.5 mm, in particular less than 0.2 mm.
  • perforated material is understood to mean any material which has openings through which the spinning mass can flow and the flow profile is influenced. A wire mesh therefore also falls under this term.
  • the above-described spinning defects are due, among other things, to small gas bubbles in the spinning device which are evidently formed when spinning on, that is to say when the spinning device is first filled with spinning material, and are not displaced from the spinning device even during spinning operation. Even that usually used in spinning the high pressure applied cannot remove these gas bubbles.
  • the invention is based on the knowledge that these gas bubbles and thus the spinning defects are eliminated if the cellulose solution is mixed immediately before extrusion through the spinneret. With the mixing it is achieved that the volume available for the spinning mass in the spinning device is reduced. The direction of flow of the spinning mass or the volume elements of the spinning mass is changed during mixing. This ensures that no unmoved volume elements remain. In particular, gas bubbles do not become stuck.
  • the particulate material can consist of glass, ceramic, quartz or a metal, glass beads with a diameter between 0.5 mm and 4.0 mm being particularly suitable.
  • At least one sieve is preferably provided as the perforated material. If there is a bed of particulate material above the sieve, the mesh size of the sieve should be smaller than the particle size of the particulate material. Furthermore, at least two or more screens can be provided, each having the same or different mesh sizes. In this case it is preferred to arrange the sieves in such a way that the mesh size becomes smaller and smaller as seen in the direction of flow. Furthermore, it is preferred to arrange at least two sieves one above the other in such a way that the respective lattice structures of the sieves are rotated relative to one another.
  • the invention also relates to a spinning device for carrying out the method according to the invention, which has a feed for the cellulose solution to be spun and spinning holes and is characterized in that a perforated material is provided directly in front of the spinning holes.
  • the perforated material preferably lies on the spinning holes.
  • a bed of the particulate material described above is preferably provided on the side of the perforated material facing away from the spinning holes.
  • At least one sieve can be provided as the perforated material, the mesh size of which is smaller than the particle size of the particulate material. If there are several, preferably at least two, screens, it is advisable to provide the screens with the same or different mesh sizes.
  • the spinning device can be designed in such a way that at least two of the screens are arranged one above the other in such a way that the respective lattice structures of the screens are rotated relative to one another.
  • a further perforated material, in particular a sieve can be provided on the particulate material forming the bed.
  • Figure 1 shows schematically a spinning device 1 according to the invention in section.
  • Reference number 2 denotes the spinneret with the spinning holes (not shown).
  • the reference number 3 denotes a sieve, which rests on the spinneret 2. Two further sieves 4 and 5 are placed on the sieve 3.
  • the sieves 3 and 4 are formed from wire with a diameter of 50 ⁇ m, the sieve 5 from wire with a diameter of 200 ⁇ m.
  • the mesh size of sieves 3, 4 and 5 is 75 ⁇ m, 75 ⁇ m and 315 ⁇ m, respectively.
  • the spinneret had 28500 spinning holes with a diameter of 100 ⁇ m.
  • FIG. 2 shows a further preferred embodiment of the spinning device according to the invention, which represents a modification of the spinning device shown in FIG. 1.
  • the spinning device according to FIG. 2 has no sieve 4. Instead, there is a bed 6 made of glass beads, which have a diameter of about 2 mm, between the sieves 3 and 5.
  • the sieve 5, which covers the bed 6, is not absolutely necessary to achieve the effect according to the invention, but it prevents movement and displacement of the glass beads, which are caused by the spinning mass flows. The screen 5 thus prevents the bed 6 from changing.
  • the effect according to the invention can also be achieved if another material, for example quartz sand, is used instead of the glass beads. Furthermore, when using a bed particulate material also several screens 3 can be used.
  • the effect according to the invention is independent of the geometry of the spinneret and can even be achieved with ring nozzles in which the spinneret has the shape of a circular ring.
  • a spinning device is shown in section in FIG. 3 and is preferably used for spinning cellulose fibers by the amine oxide process.
  • the reference number 7 designates the feed for the spinning mass
  • the reference number 8 the annular spinneret
  • the reference number 9 a bed of glass beads
  • the reference number 10 another sieve for covering the bed.
  • the spinning mass can be distributed by means of a distribution plate which is attached above the spinneret.
  • a screen which rests on a support plate, can also be provided between the distribution plate and the spinneret.

Landscapes

  • 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)

Abstract

L'invention concerne un procédé de production de fibres cellulosiques, selon lequel une solution de cellulose dans un aminoxyde tertiaire aqueux est extrudée par un dispositif de filage doté d'une buse de filage. Ce procédé est caractérisé en ce que la solution de cellulose est mélangée juste avant l'extrusion par la buse de filage. L'invention concerne également un dispositif de filage comprenant un dispositif d'alimentation destiné à la solution de cellulose à filer et une buse de filage. Ce dispositif est également caractérisé en ce que la buse de filage est recouverte d'un matériau perforé.
PCT/AT1998/000146 1998-06-16 1998-06-16 Procede de production de corps moules cellulosiques, notamment de fibres, et dispositif de filage correspondant Ceased WO1999066110A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU77502/98A AU7750298A (en) 1998-06-16 1998-06-16 Method for producing cellulose shaped bodies, especially fibers, and a spinning device for carrying out the method
PCT/AT1998/000146 WO1999066110A1 (fr) 1998-06-16 1998-06-16 Procede de production de corps moules cellulosiques, notamment de fibres, et dispositif de filage correspondant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AT1998/000146 WO1999066110A1 (fr) 1998-06-16 1998-06-16 Procede de production de corps moules cellulosiques, notamment de fibres, et dispositif de filage correspondant

Publications (1)

Publication Number Publication Date
WO1999066110A1 true WO1999066110A1 (fr) 1999-12-23

Family

ID=3683789

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1998/000146 Ceased WO1999066110A1 (fr) 1998-06-16 1998-06-16 Procede de production de corps moules cellulosiques, notamment de fibres, et dispositif de filage correspondant

Country Status (2)

Country Link
AU (1) AU7750298A (fr)
WO (1) WO1999066110A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102492999A (zh) * 2011-12-21 2012-06-13 东南大学 一种可实现静电纺丝法量产纳米纤维的喷头
CN108815893A (zh) * 2018-08-01 2018-11-16 张家港市利佳纺织有限公司 一种用于氨纶纺纱液体的过滤装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266363A (en) * 1938-11-10 1941-12-16 Du Pont Apparatus for the production of filaments
FR1375456A (fr) * 1963-11-22 1964-10-16 British Nylon Spinners Ltd Procédé d'extrusion de polymères synthétiques à poids moléculaire élevé
CH475373A (de) * 1967-11-03 1969-07-15 Glanzstoff Ag Spinnpackung
DE2434828A1 (de) * 1974-07-19 1976-02-05 Spinnstoffabrik Zehlendorf Ag Verfahren zum filtrieren einer fluessigkeit
US5254299A (en) * 1987-10-27 1993-10-19 The Dow Chemical Company Method of improving melt spinning of linear ethylene polymers
WO1994028208A1 (fr) * 1993-05-28 1994-12-08 Courtaulds Fibres (Holdings) Limited Systeme de filtration

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266363A (en) * 1938-11-10 1941-12-16 Du Pont Apparatus for the production of filaments
FR1375456A (fr) * 1963-11-22 1964-10-16 British Nylon Spinners Ltd Procédé d'extrusion de polymères synthétiques à poids moléculaire élevé
CH475373A (de) * 1967-11-03 1969-07-15 Glanzstoff Ag Spinnpackung
DE2434828A1 (de) * 1974-07-19 1976-02-05 Spinnstoffabrik Zehlendorf Ag Verfahren zum filtrieren einer fluessigkeit
US5254299A (en) * 1987-10-27 1993-10-19 The Dow Chemical Company Method of improving melt spinning of linear ethylene polymers
WO1994028208A1 (fr) * 1993-05-28 1994-12-08 Courtaulds Fibres (Holdings) Limited Systeme de filtration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102492999A (zh) * 2011-12-21 2012-06-13 东南大学 一种可实现静电纺丝法量产纳米纤维的喷头
CN108815893A (zh) * 2018-08-01 2018-11-16 张家港市利佳纺织有限公司 一种用于氨纶纺纱液体的过滤装置

Also Published As

Publication number Publication date
AU7750298A (en) 2000-01-05

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