EP0574762A1 - Procédé pour la fabrication de fibres de viscose avec section en forme de ruban - Google Patents

Procédé pour la fabrication de fibres de viscose avec section en forme de ruban Download PDF

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Publication number
EP0574762A1
EP0574762A1 EP93108662A EP93108662A EP0574762A1 EP 0574762 A1 EP0574762 A1 EP 0574762A1 EP 93108662 A EP93108662 A EP 93108662A EP 93108662 A EP93108662 A EP 93108662A EP 0574762 A1 EP0574762 A1 EP 0574762A1
Authority
EP
European Patent Office
Prior art keywords
cellulose
xanthate
coagulation
precipitation bath
acid
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.)
Withdrawn
Application number
EP93108662A
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German (de)
English (en)
Inventor
Dirk Dr. Theis
Willi Lohr
Bernd Dr. Huber
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.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Publication of EP0574762A1 publication Critical patent/EP0574762A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor

Definitions

  • the present invention relates to a new process for the production of viscose fibers with ribbon-shaped cross sections, which can be used advantageously in conventional textile and non-textile applications.
  • Viscose fibers with ribbon-shaped cross sections are already known.
  • publisher Dr. K. Götze, Springer Verlag (1967) on p. 623 stated that by varying the spinning conditions, viscose fibers can be produced which are equivalent to a tubular structure.
  • the object of the present invention is to change the cross-sectional shape of the resulting viscose fibers by simply varying the spinning conditions so that fibers with a ribbon-shaped cross-section and other properties, such as e.g. high absorbency and good water retention, changed optics and changed grip, which can be used well in the hygiene sector.
  • the cellulose xanthate solution can be prepared by a conventional method, such as in the "Manufacturing process of viscose for test purposes, leaflet III / 4, author: Association of pulp and paper chemists and engineers, technical committee for rayon, rayon and foils".
  • the process according to the invention can be carried out on conventional apparatus for the production of viscose fibers. It is therefore not necessary to use specially designed nozzles with slot-shaped profiles.
  • the cross-sectional shape of the viscose fiber can be adjusted by simply varying the composition of the precipitation bath.
  • cellulose for example in the form of pressed plates, rolled goods, flakes or pressed, undried pulp
  • alkali the alkali cellulose initially forming in a manner known per se.
  • Any basic systems can be used as lyes, in particular aqueous alkali lyes, such as potassium lye or in particular sodium hydroxide solution.
  • concentration of the base is usually 15 to 30% by weight of base, based on the total weight of base.
  • the alkali cellulose After pressing off the excess lye, the alkali cellulose is obtained. After ripening, xanthation, dissolving, ripening and deaerating the viscose, the spinning solution is obtained, e.g. is described in the above-mentioned leaflet III / 4, production of viscose for test purposes.
  • the xanthate In the precipitation bath, the xanthate coagulates into threads and is hydrolyzed to regenerated cellulose, salt and carbon disulphide using a protic acid. The carbon disulfide is returned to the process.
  • the salt is formed from the counter cation of the xanthate and the counter anion of protonic acid. In the case of coagulation and decomposition of the sodium xanthates by sulfuric acid, sodium sulfate is formed.
  • any protonic acid ie an organic acid such as acetic acid or a mineral acid such as hydrochloric, nitric or sulfuric acid, can be used as the protonic acid in the precipitation bath.
  • suitable metal salts are water-soluble salts of metals of the second main and subgroup, as well as the third main group of the periodic table.
  • the counterions used for these salts are preferably those which correspond to the anionic part of the protonic acid used in the precipitation bath. However, salts other than these can also be used.
  • the concentration of these salts in the precipitation bath is usually 2 to 10 g / l, preferably 4 to 8 g / l.
  • cross-sectional shape of regenerated cellulose can be specifically changed by reducing the acid concentration in the precipitation bath.
  • the concentration of protonic acid in the precipitation bath has to be reduced until cellulose fibers with band-shaped cross sections are formed.
  • this concentration is necessary to lower this concentration to less than or equal to 64 g / l, preferably 60 to 40 g / l.
  • the temperature of the precipitation bath is generally between 30 and 60 ° C, preferably around 45 to 55 ° C.
  • the filaments are drawn off at a speed of 10 to 100 m / min, preferably at a speed of 50 to 80 m / min.
  • the spinning delay is usually 1: 1 to 1: 1.6.
  • the filaments can be continuously treated in a manner known per se. After the cellulose filaments have been drawn one or more times, deacidification, desulphurization, bleaching, followed by one or more washing stages and finally the cellulose fiber is finished and dried.
  • Typical draw ratios are 1: 1.1 to 1: 1.5.
  • the drawing temperature is usually 40 to 90 ° C.
  • the drawing is carried out in hot water, in hot steam or in acid solutions, preferably in sulfuric acid solutions.
  • the filaments can be cut into flakes or wound onto spools as continuous filaments.
  • a sodium xanthate solution prepared according to leaflet III / 4 "Production of viscose for test purposes" is pressed into a precipitation bath (4) by means of the spinning pumps (2) via a spinneret (3) with round bores.
  • the filaments (5) formed are drawn off via a drawing pin (6) in the form of a glass rod by means of a take-off roller (7) and wound up thereon.
  • the aqueous precipitation bath has the following additives: 320 g / l sodium sulfate, 60 g / l sulfuric acid, and 5.6 g / l zinc sulfate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP93108662A 1992-06-13 1993-05-28 Procédé pour la fabrication de fibres de viscose avec section en forme de ruban Withdrawn EP0574762A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4219486 1992-06-13
DE4219486 1992-06-13

Publications (1)

Publication Number Publication Date
EP0574762A1 true EP0574762A1 (fr) 1993-12-22

Family

ID=6461012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108662A Withdrawn EP0574762A1 (fr) 1992-06-13 1993-05-28 Procédé pour la fabrication de fibres de viscose avec section en forme de ruban

Country Status (3)

Country Link
EP (1) EP0574762A1 (fr)
JP (1) JPH0665808A (fr)
FI (1) FI932658A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999007926A2 (fr) * 1997-08-07 1999-02-18 Achim Neumayr Procede permettant de fabriquer une fibre de cellulose a partir d'hydrocellulose
WO2007110497A3 (fr) * 2006-03-28 2007-12-13 Rieter Perfojet Non-tissé résistant et se délitant
CN113089112A (zh) * 2019-12-23 2021-07-09 连津格股份公司 用于制造纤维素纤维的纺丝机及其操作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102587C (fr) *
GB757233A (en) * 1953-12-03 1956-09-19 Courtaulds Ltd Improvements in and relating to the production of regenerated cellulose fibres from viscose
US3097914A (en) * 1960-09-07 1963-07-16 Courtaulds Ltd Process for the production of a ribbon filament yarn of regenerated cellulose
DE1494762B1 (de) * 1965-02-02 1970-04-30 Schwarza Chemiefaser Verfahren zur Herstellung von gekraeuselten Viskosestapelfasern mit flachem Querschnitt

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102587C (fr) *
GB757233A (en) * 1953-12-03 1956-09-19 Courtaulds Ltd Improvements in and relating to the production of regenerated cellulose fibres from viscose
US3097914A (en) * 1960-09-07 1963-07-16 Courtaulds Ltd Process for the production of a ribbon filament yarn of regenerated cellulose
DE1494762B1 (de) * 1965-02-02 1970-04-30 Schwarza Chemiefaser Verfahren zur Herstellung von gekraeuselten Viskosestapelfasern mit flachem Querschnitt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TEXTILE RESEARCH JOURNAL Bd. 30, Nr. 3, März 1960, Seiten 153 - 170 WAYNE A. SISSON 'The Spinning of Rayon as Related to its Structure and Properties' *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999007926A2 (fr) * 1997-08-07 1999-02-18 Achim Neumayr Procede permettant de fabriquer une fibre de cellulose a partir d'hydrocellulose
WO1999007926A3 (fr) * 1997-08-07 2000-04-20 Achim Neumayr Procede permettant de fabriquer une fibre de cellulose a partir d'hydrocellulose
US6720057B1 (en) 1997-08-07 2004-04-13 Achim Neumayr Method for producing a cellulose fibre from hydrocellulose
WO2007110497A3 (fr) * 2006-03-28 2007-12-13 Rieter Perfojet Non-tissé résistant et se délitant
CN113089112A (zh) * 2019-12-23 2021-07-09 连津格股份公司 用于制造纤维素纤维的纺丝机及其操作方法

Also Published As

Publication number Publication date
FI932658A (fi) 1993-12-14
JPH0665808A (ja) 1994-03-08
FI932658A0 (fi) 1993-06-10

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