WO2014037191A1 - Procédé de fabrication de fibres de viscose - Google Patents

Procédé de fabrication de fibres de viscose Download PDF

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Publication number
WO2014037191A1
WO2014037191A1 PCT/EP2013/066887 EP2013066887W WO2014037191A1 WO 2014037191 A1 WO2014037191 A1 WO 2014037191A1 EP 2013066887 W EP2013066887 W EP 2013066887W WO 2014037191 A1 WO2014037191 A1 WO 2014037191A1
Authority
WO
WIPO (PCT)
Prior art keywords
viscose
fibers
viscose fibers
spinning
cross
Prior art date
Application number
PCT/EP2013/066887
Other languages
German (de)
English (en)
Inventor
Roland Scholz
Ingo Bernt
Bernd Probst
Haio Harms
Original Assignee
Kelheim Fibres Gmbh
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 Kelheim Fibres Gmbh filed Critical Kelheim Fibres Gmbh
Publication of WO2014037191A1 publication Critical patent/WO2014037191A1/fr

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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
    • 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
    • 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
    • D01F2/08—Composition of the spinning solution or the bath

Definitions

  • the present invention relates to a process for the production of viscose fibers and viscose fibers obtainable by the process according to the invention.
  • the invention further relates to the use of the viscose fibers according to the invention in a nonwoven and to a nonwoven which contains viscose fibers according to the invention.
  • Absorptive capacity strongly influenced by the expression of the fiber cross-section.
  • the cross-section of conventional viscose fibers that is fibers spun from a conventional viscose spinning composition through round-section spinning holes into a spinning bath of conventional composition, is irregular and lobed / corrugated due to various effects caused by coagulation and regeneration of the cellulose.
  • Viscose spun by spin holes having specific cross-sections e.g. to spin a flat cross-section or a multi-limb cross-section. Accordingly, fibers are obtained with e.g. flat or multi-legged cross section, wherein the cross sections of the fibers obtained from a plurality of exactly equal shaped holes of a nozzle are substantially equal.
  • the non-prepublished European patent application EP 11191093.1 describes the production of Viskoseflachfasern by spinning from jet holes with a flat cross-section using a dope containing a Koagulationsverzögerer, especially polyethylene glycol (PEG).
  • a field of application of viscose fibers are nonwovens, eg hydroentangled nonwovens, for use as wipes in the hygiene sector.
  • nonwovens can be used in disposal, e.g. Do not block the sewage system via toilet flushes. It is therefore necessary that the nonwovens on the one hand in the dry or wet state have sufficient strength and on the other hand dissolve as much as possible in the disposal of the sewage system, preferably in the individual fibers.
  • WO 2006/134132 describes the use of viscose flat fibers in one
  • Fiber composite with the purpose to improve the solubility of the fiber composite in water.
  • WO 89/01062 A1 and WO 2004/085720 Al describe viscose fibers with a modified cross section.
  • Viscose fibers suitable for use in nonwovens are suitable for use in nonwovens.
  • Viscose fibers dissolved comprising the steps:
  • the Viskosepinnmasse a coagulation retarder in particular polyethylene glycol, in a proportion of at least 2.5%, preferably 3.5% to 4.5%, each based on cellulose, contains and
  • the spin bath has a content of H 2 S0 4 of 110-140 g / L, preferably 120-130 g / L, a content of Na 2 S0 4 of 250-400 g / L, preferably 300-400 g / L, especially preferably 350 g / L and has a content of ZnS0 4 of 5-20 g / L, preferably 5-10 g / L, particularly preferably 7 g / L.
  • FIG. 1 shows the photomicrographically recorded cross sections of viscose fibers spun from a viscose spinning material without addition of PEG.
  • Figure 2 shows the cross-sections of viscose fibers spun from a viscose gum with addition of 1.3% PEG based on cellulose.
  • FIG. 3 shows the cross sections of viscose fibers according to the invention, which consist of a
  • FIG. 4 shows the cross sections of viscose fibers according to the invention, which consist of a
  • a coagulation retarder in particular PEG, in certain concentration ranges in the viscose spinning mass is obviously important.
  • coagulation inhibitors are N-free polyoxyalkylene derivatives, N-free oxyethylated and N-containing oxyethylated compounds and N-containing compounds (amines, quaternary ammonium salts).
  • the coagulation retardant is preferably added to the viscose spinning composition immediately before spinning.
  • the filaments are spun into a spinning bath with a relatively high acid concentration (H 2 SO 4 ).
  • H 2 SO 4 a relatively high acid concentration
  • the content of zinc sulfate in the spinning bath can be kept in the usual procedure for the viscose process. It can - apart from the presence of Koagulationsverzö gerers - a common Viskosepinnmasse be used.
  • a typical standard spinning viscose has a content of cellulose of 8-10 wt.% And a content of NaOH of
  • the nozzle delay can be 1.0 to 3.0.
  • the stretch of the filaments after leaving the spinning bath can be from 10% to over 40%.
  • the viscose fibers obtainable by the process according to the invention are:
  • Standard viscose fibers i. no modal fibers (as defined by the BISFA - Bureau for the International Standardization of Man-Made Fibers).
  • the viscose fibers according to the invention have very different, irregular multi-limbed and / or curved fiber cross-sections.
  • the viscose fibers according to the invention are characterized in that at least 50% of the fibers have a letter-shaped cross-section. Although not all cross-sections of the fibers are directly attributable to a letter form, the cross-sections convey the overall impression of a letter soup or letter pasta ("aiphabet pasta").
  • the fibers have multi-limbed cross sections in the form of letters such as E, F, H, L, I, J, L, C, U, V, S, N, M, W, Y and Z.
  • the cross section of the spun fibers differs only slightly from conventional viscose fibers.
  • the proportion of fibers with a cavity in cross-section is less than 10%, preferably less than 5%, in the viscose fibers according to the invention.
  • the fibers are massive viscose fibers, not so about hollow fibers or collapsed hollow fibers, e.g. from US 4,129,679.
  • the viscose fibers of the invention are preferably also characterized in that the surface of the fibers is substantially smooth.
  • substantially smooth is to be understood in particular that the fiber has substantially no grooves in the longitudinal direction, which has a groove depth of more than 10%>, in particular more than 5% of
  • Fiber thickness As "grooves” are to be understood that typical for standard viscose fibers, in relation to the width of the fiber small indentations in the longitudinal direction.
  • the viscose fibers according to the invention preferably have a titer of less than 5 dtex, preferably 1.3 to 3.3 dtex.
  • viscose fibers according to the invention are in the form of
  • Staple fibers i. as a multiplicity of cut fibers.
  • the cutting length can be 0.3 to 150 mm.
  • the viscose fibers according to the invention are outstandingly suitable for use in a nonwoven, in particular a hydroentangled nonwoven.
  • fibers with a cutting length of 3 to 20 mm, in particular 3 to 12 mm are suitable.
  • cutting lengths of 30 mm to 60 mm, in particular 30 mm to 40 mm are of interest.
  • the present invention also relates to a nonwoven fabric containing
  • Viscose fibers according to the invention are Viscose fibers according to the invention.
  • the viscose fibers according to the invention may be present in the nonwoven in a proportion of up to 100%, preferably 50-100%).
  • the production of the nonwovens can be carried out by wet-laying process as well as drying procedures such as airlaid and carding / carding.
  • the solidification can be carried out with the aid of binders and / or mechanical consolidation methods, preferably with needling and
  • nonwovens of viscose fibers according to the invention dissolve very quickly in water and do not clog wastewater pumps.
  • webs according to the invention are preferably suitable for wipes and / or wipes
  • the viscose fibers of the invention are also excellent for the production of yarns and nonwovens for textiles and clothing with comfort and
  • thermoregulatory properties insulation against cold and heat
  • fibers with a cut length of 30 to 150 mm in particular 40 to 110 mm, particularly preferably 40 mm (cotton type) and 70 mm (wool type) are suitable for textile applications.
  • filter media in particular wet-laid nonwovens containing fibers with a cut length of 3 to 12 mm are suitable.
  • a viscose spinning composition was spun in each case by a spinneret with round openings with a diameter of 60 ⁇ m as follows and further treated:
  • Example 2 Addition of 1.3% PEG based on cellulose to viscose spinning mass
  • Example 3 Addition of 2.6% PEG based on cellulose to Viskosepinnmasse
  • Example 4 Addition of 3.9% PEG based on cellulose to viscose spinning mass immediately before spinning.
  • the denier of the spun fibers was 1.7 dtex in each case, the cut length 40 mm.
  • Figure 1 shows the typical irregular lobed cross sections of a conventional viscose fiber.
  • FIG. 2 shows hardly any changes in the cross sections in comparison to FIG. 1.
  • the "multi-limbed" letter shapes recede, the legs are less pronounced, shapes such as I, J, C, U, or V occur more intensively, and the surface of the fibers are even smoother than that of FIG. It remains the overall impression of a alphabet soup or of pasta noodles.
  • Fibers having a basis weight of 50 g / l and having a titre of 1.7 dtex and cutting lengths of 12, 16 and 20 mm were produced from fibers according to the invention which had been produced in the viscose spinning composition using 3.9% PEG based on cellulose. m 2 produced.
  • the dissolution properties of these nonwovens in water were determined by means of a tube test and a pump test and compared with the dissolution property of nonwovens of other viscose fibers.
  • the Tube test was carried out in accordance with the "Guidance Document for Assessing the flush Ability of nonwoven consumer products, ED ANA and INDA, 2 nd Edition, 2009," the pump test fully according to this document.
  • the nonwovens of the fibers of the invention showed excellent

Abstract

L'invention concerne un procédé de fabrication de fibres de viscose, ce procédé comprenant les étapes suivantes : - la fourniture d'une masse de viscose à filer; - le filage de la masse de viscose à filer à travers une pluralité d'orifices de filage ronds dans un bain de filage, avec formation de fils, - la masse de viscose à filer contenant un retardateur de coagulation, en particulier du polyéthylèneglykol, à raison d'au moins 2,5 %, de préférence 3,5 % à 4,5 %, respectivement rapporté à la cellulose, et - le bain de filage présentant une teneur en H2S04 de 110-140 g/L, de préférence de 120-130 g/L, une teneur en Na2SO4 de 250-400 g/L, de préférence de 300-400 g/L, de manière particulièrement préférée de 350 g/L et une teneur en ZnSO4 de 5-20 g/L, de préférence de 5-10 g/L, de manière particulièrement préférée de 7 g/L. Les fibres de viscose pouvant être obtenues par le procédé selon l'invention présentent de préférence une section transversale en forme de caractère.
PCT/EP2013/066887 2012-09-07 2013-08-13 Procédé de fabrication de fibres de viscose WO2014037191A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12183422.0A EP2706133A1 (fr) 2012-09-07 2012-09-07 Procédé destiné à la fabrication dýune fibre de viscose
EP12183422.0 2012-09-07

Publications (1)

Publication Number Publication Date
WO2014037191A1 true WO2014037191A1 (fr) 2014-03-13

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EP (1) EP2706133A1 (fr)
WO (1) WO2014037191A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036372A1 (fr) 2013-09-13 2015-03-19 Krones Ag Adjuvant de filtration et couche filtrante

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110144633A (zh) * 2019-05-29 2019-08-20 新乡化纤股份有限公司 一种粘胶细旦特种纤维30d/4f扁平纤维的成型工艺

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962341A (en) * 1956-05-14 1960-11-29 Du Pont Viscose modification
US3843378A (en) * 1972-10-16 1974-10-22 Fmc Corp Regenerated cellulose-polyethylene glycol high fluid-holding fiber mass
US4129679A (en) 1969-11-27 1978-12-12 Courtaulds Limited Multi-limbed regenerated cellulose filaments
US4388260A (en) 1979-03-16 1983-06-14 Avtex Fibers Inc. Method of making viscose rayon
WO1989001062A1 (fr) 1987-07-30 1989-02-09 Courtaulds Plc Fibre cellulosique
WO2004005595A1 (fr) 2002-07-09 2004-01-15 Lenzing Aktiengesellschaft Procede de fabrication de fibres de viscose regenerees, solides
WO2004085720A1 (fr) 2003-03-27 2004-10-07 Lenzing Aktiengesellschaft Fibre de viscose standard regeneree solide
WO2006134132A1 (fr) 2005-06-15 2006-12-21 Kelheim Fibres Gmbh Composite fibreux pouvant etre dissous ou decompose dans l'eau et produit obtenu a partir dudit composite

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100374787B1 (ko) 2000-01-18 2003-03-04 삼성전자주식회사 대역 효율적인 연쇄 티.씨.엠 디코더 및 그 방법들

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962341A (en) * 1956-05-14 1960-11-29 Du Pont Viscose modification
US4129679A (en) 1969-11-27 1978-12-12 Courtaulds Limited Multi-limbed regenerated cellulose filaments
US3843378A (en) * 1972-10-16 1974-10-22 Fmc Corp Regenerated cellulose-polyethylene glycol high fluid-holding fiber mass
US4388260A (en) 1979-03-16 1983-06-14 Avtex Fibers Inc. Method of making viscose rayon
WO1989001062A1 (fr) 1987-07-30 1989-02-09 Courtaulds Plc Fibre cellulosique
WO2004005595A1 (fr) 2002-07-09 2004-01-15 Lenzing Aktiengesellschaft Procede de fabrication de fibres de viscose regenerees, solides
WO2004085720A1 (fr) 2003-03-27 2004-10-07 Lenzing Aktiengesellschaft Fibre de viscose standard regeneree solide
WO2006134132A1 (fr) 2005-06-15 2006-12-21 Kelheim Fibres Gmbh Composite fibreux pouvant etre dissous ou decompose dans l'eau et produit obtenu a partir dudit composite

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GÖTZE: "Chemiefasern nach dem Viskoseverfahren", 1940, pages: 428 - 435
HERZOG, TEXTILE FORSCHUNG, vol. 8, 1926, pages 87 - 93

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036372A1 (fr) 2013-09-13 2015-03-19 Krones Ag Adjuvant de filtration et couche filtrante

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Publication number Publication date
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