US20140147616A1 - Regenerated cellulose fiber - Google Patents

Regenerated cellulose fiber Download PDF

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Publication number
US20140147616A1
US20140147616A1 US14/232,828 US201214232828A US2014147616A1 US 20140147616 A1 US20140147616 A1 US 20140147616A1 US 201214232828 A US201214232828 A US 201214232828A US 2014147616 A1 US2014147616 A1 US 2014147616A1
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US
United States
Prior art keywords
cellulose fiber
length
section
fiber
cellulose
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.)
Abandoned
Application number
US14/232,828
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English (en)
Inventor
Ingo Bernt
Matthew North
Reinhold Röthenbacher
Walter Roggenstein
Roland Scholz
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.)
Kelheim Fibres GmbH
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
Assigned to KELHEIM FIBRES GMBH reassignment KELHEIM FIBRES GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHOLZ, ROLAND, BERNT, INGO, NORTH, MATTHEW, ROTHENBACHER, REINHOLD, ROGGENSTEIN, WALTER
Publication of US20140147616A1 publication Critical patent/US20140147616A1/en
Abandoned 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/2395—Nap type surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]

Definitions

  • the present invention relates to a regenerated cellulose fiber which is obtained by the viscose process.
  • fibers with a particularly high liquid storage capacity are desirable in order to thus allow an absorption capacity as high as possible of the sanitary product.
  • Fiber materials according to the prior art which usually are used for the production of tampons are regular viscose fibers, so-called trilobal viscose fibers and cotton.
  • the specific absorption capacity of said fibers according to the so-called Syngina test as described further below is about 4.0 g/g for cotton, 4.5 g/g for regular viscose and 5.2 g/g for trilobal viscose fibers.
  • the aim of tampon producers is to achieve a particular degree of absorption with a minimum expenditure of fiber material and money.
  • hollow fibers and collapsed hollow fibers are difficult to produce because of their high water retention capacity, as a result of which the fibers swell strongly during washing and adhere to each other during drying because of the formation of hydrogen bonds, which makes them brittle in the dry state, soapy in the wet state and renders it difficult to break them up and process them into a carded fabric.
  • multi-limbed viscose fibers has been described, for example, in the U.S. Pat. Nos. 5,634,914 and 5,458,835 and in EP-A1 0 301 874.
  • the process disclosed therein describes the spinning of a commonly used viscose, which may contain a certain amount of a modifier known from prior art, through extrusion holes of a multi-limbed shape, in particular a trilobal shape, into a conventional spinning bath.
  • the essential feature of said process is that the shape of the multi-limbed extrusion holes in the spinneret is similar to the desired shape of the cross-section of the filaments. According to the teachings of those documents, the geometry of the spinneret hole determines the shape of the fiber cross-section, and a particular length-to-width ratio of the fiber cross-section can be obtained by designing the extrusion holes appropriately.
  • multi-limbed fibers have an absorption capacity which is enhanced in comparison to that of viscose fibers according to the prior art, namely in particular in tampons, and that such fibers must have at least 3 limbs and that each limb of those fibers must exhibit a length-to-width ratio of at least 2:1, most preferably of from 3:1 to 5:1.
  • a solid regenerated standard viscose fiber which has a cross-section the area of which is larger than the area of the largest equilateral triangle inscribed into said cross-section by a factor of less than 2.50 times, preferably less than 2.40 times, particularly preferably less than 2.25 times, and which exhibits a Syngina absorption capacity of more than 6.0 g/g fiber, as defined below.
  • WO 2004/005595 A describes an absorbent standard viscose fiber having an irregularly lobed cross-section. Further viscose fibers with irregular cross-sections are described in U.S. Pat. No. 4,129,679 and GB-A 1,333,047.
  • U.S. Pat. No. 6,403,217 B1 describes a variety of die configurations for the production of fibers having modified fiber cross-sections according to the melt spinning process. Melt spinning processes differ fundamentally from the wet spinning process used in the viscose process.
  • a regenerated cellulose fiber is provided the cross-section of which comprises an oblong, essentially flat section and which is characterized in that at least one limb branches off from the oblong section, wherein the length of said limb is at most 40% of the length of the oblong section.
  • the object of the invention is also achieved by a fiber bundle which contains a plurality of cellulose fibers according to the invention.
  • FIG. 1 shows the attachment of two trilobal cellulose fibers known, for example, from EP 0 301 874.
  • FIG. 2 shows the attachment of several fibers having a flat cross-section.
  • FIG. 3 shows the cross-section of a fiber according to the invention.
  • FIG. 4 shows the attachment of several fibers according to the invention.
  • FIG. 5 shows the retention of water by a fiber according to the invention.
  • the pore size of products produced from a plurality of such fibers can be influenced favorably as compared to trilobal fibers.
  • the limb is preferably arranged essentially at a right angle with respect to the oblong section.
  • the limbs can thereby branch off from the oblong section in both directions.
  • the total [AAR1 ] length of the branch-off limbs does not exceed the length of the oblong section.
  • At least a portion of the limbs may have a ratio of length to width of from 2:1 to 10:1.
  • At least a portion of the limbs may have a width which is smaller than the width of the flat section.
  • the entire curvature of the flat section preferably has at most 120°. Even when the spinning is effected through dies with a flat spinning opening, a certain curvature may occur in the resulting flat fibers (or, respectively, in the flat section which is provided according to the invention).
  • the angle defined by the endpoints of the flat section as well as the point of the flat section which is located farthest from the imaginary straight line through said endpoints is thereby regarded as the curvature.
  • the fiber titer of the fiber according to the invention may range from 1.3 dtex to 10 dtex.
  • the cellulose fiber according to the invention can be provided in the form of a staple fiber, a short-cut fiber or as a filament tow.
  • the invention also relates to a fiber bundle containing a plurality of regenerated multi-limbed cellulose fibers, wherein at least 10%, preferably at least 20%, particularly preferably at least 50%, of the multi-limbed cellulose fibers are provided in the form of a cellulose fiber according to the invention.
  • the fiber bundle according to the invention also essentially all of the multi-limbed cellulose fibers contained therein may be provided in the form of a cellulose fiber according to the invention.
  • a plurality of fibers can be understood as a “fiber bundle”, for example, spun rayon (a plurality of staple fibers), a strand of continuous filaments or a bale of fibers.
  • the multi-limbed cellulose fibers contained in the fiber bundle are provided in the form of the cellulose fiber according to the invention and, respectively, the cross-sections of the multi-limbed cellulose fibers contained in the fiber bundle are essentially equal.
  • the fiber bundle may contain further fibers, for example, cellulose fibers which are not multi-limbed, but also fibers of a different origin, e.g., from other polymers.
  • the opening of the spinneret comprises a slot-shaped section from which at least one limb branches off the length of which is at most 40% of the length of the slot-shaped section.
  • the process according to the invention may comprise the step of mixing the fibers produced by the process with other fibers, for example, conventional multi-limbed fibers, fibers which are not multi-limbed and/or fibers of a different origin, e.g., from other polymers.
  • other fibers for example, conventional multi-limbed fibers, fibers which are not multi-limbed and/or fibers of a different origin, e.g., from other polymers.
  • the smaller angle between the limb and the slot-shaped section has between 30° and 90°, particularly preferably between 60° and 90°.
  • the process according to the invention is configured such that the spinneret comprises several openings, with all the openings having essentially the same shape.
  • the preferred configuration namely that all fibers have essentially the same cross-section, is achieved, for example, in a fiber bundle consisting of fibers according to the invention.
  • the invention also relates to the use of the regenerated cellulose fiber according to the invention and, respectively, of the fiber bundle according to the invention in absorbent products, sanitary products, in particular tampons, incontinence products, sanitary pads and panty liners, filling materials for blankets, cushions and sleeping bags, packings for foodstuff, in particular for meat products, papers, in particular filter papers, flock, clothing, in particular inlay fleece and clothing textiles for moisture management, mixed with other fibers or as a multi-layered structure, and wound dressings.
  • FIG. 1 shows the attachment of two conventional Y-fibers 1 , 2 and the pore structure produced in this way.
  • a further problem of flat fibers is that they can be bent about their thinner axis with relative ease. Therefore, hollow spaces in liquid-charged absorbent bodies collapse easily.
  • a smaller pore size can now be achieved by appropriately arranging and dimensioning at least one, preferably several limbs diverging from the oblong section.
  • FIG. 3 shows a preferred embodiment of a fiber 1 ′′ according to the invention comprising an oblong section 3 and several limbs 4 , 5 , 6 , 7 diverging from the oblong section 3 essentially at a right angle, as is the case in FIG. 3 .
  • Said fiber can be produced by spinning a viscose spinning mass through a spinning opening having an appropriate configuration (i.e., a slot-shaped section and limb-shaped sections branching off from said section).
  • the length of the limbs 4 , 5 , 6 , 7 is in each case less than 40% of the length of the oblong section.
  • the width of the limbs is in each case smaller than the width of the oblong section.
  • the fibers are parallelized at a certain rate. Therefore, the following consideration initially takes parallelized fibers as a basis.
  • the limbs of the structure produced from fibers according to the invention act as distance pieces which cause the formation of a large number of very fine capillaries when several such fibers are attached to each other (see FIG. 4 ).
  • the limbs also act as a reinforcement and as distance pieces, which prevents a bending of the fiber across the thinner axis of the flat fiber portion. In this manner, a high absorption capacity is ensured.
  • a further advantage of the fiber according to the invention is that water is stored particularly advantageously by adhesion forces in the large number of clearances between the limbs of a fiber, which is illustrated in FIG. 5 .
  • structures made of the fibers according to the invention exhibit a particularly high water retention capacity against pressure.

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  • 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)
  • Absorbent Articles And Supports Therefor (AREA)
US14/232,828 2011-07-15 2012-06-26 Regenerated cellulose fiber Abandoned US20140147616A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11174140.1 2011-07-15
EP20110174140 EP2546395A1 (de) 2011-07-15 2011-07-15 Regenerierte Cellulosefaser
PCT/EP2012/062376 WO2013010761A1 (de) 2011-07-15 2012-06-26 Regenerierte cellulosefaser

Publications (1)

Publication Number Publication Date
US20140147616A1 true US20140147616A1 (en) 2014-05-29

Family

ID=46420165

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/232,828 Abandoned US20140147616A1 (en) 2011-07-15 2012-06-26 Regenerated cellulose fiber

Country Status (9)

Country Link
US (1) US20140147616A1 (de)
EP (2) EP2546395A1 (de)
JP (1) JP2014524987A (de)
KR (1) KR20140037209A (de)
CN (1) CN103649388A (de)
AU (1) AU2012286157A1 (de)
BR (1) BR112014000826A2 (de)
CA (1) CA2839234A1 (de)
WO (1) WO2013010761A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018224986A2 (en) 2017-06-07 2018-12-13 Rai Strategic Holdings, Inc. Fibrous filtration material for electronic smoking article

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2546397A1 (de) * 2011-07-15 2013-01-16 Kelheim Fibres GmbH Regenerierte Cellulosefaser
CN106633980A (zh) * 2016-12-05 2017-05-10 芜湖天鸿汽车零部件有限公司 一种汽车坐垫的填充材料及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2280098A1 (de) * 2009-07-31 2011-02-02 Kelheim Fibres GmbH Regenerierte Cellulosefaser

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1333047A (en) 1969-11-27 1973-10-10 Courtaulds Ltd Process for making filaments
US4129679A (en) 1969-11-27 1978-12-12 Courtaulds Limited Multi-limbed regenerated cellulose filaments
JPS5766754A (en) 1980-10-15 1982-04-23 Kao Corp Tampon
ATE77417T1 (de) * 1987-07-30 1992-07-15 Courtaulds Plc Cellulosefaser.
GB2208277B (en) 1987-07-30 1991-11-13 Courtaulds Plc Cellulosic fibre
US6103376A (en) * 1996-08-22 2000-08-15 Eastman Chemical Company Bundles of fibers useful for moving liquids at high fluxes and acquisition/distribution structures that use the bundles
CN1316079C (zh) * 2002-07-09 2007-05-16 连津格股份公司 固体再生粘胶纤维的制造方法
AT412654B (de) 2003-03-27 2005-05-25 Chemiefaser Lenzing Ag Massive regenerierte standardviskosefaser

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2280098A1 (de) * 2009-07-31 2011-02-02 Kelheim Fibres GmbH Regenerierte Cellulosefaser
US20120209234A1 (en) * 2009-07-31 2012-08-16 Kelheim Fibres Gmbh Regenerated cellulose fiber

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018224986A2 (en) 2017-06-07 2018-12-13 Rai Strategic Holdings, Inc. Fibrous filtration material for electronic smoking article
US10383369B2 (en) 2017-06-07 2019-08-20 Rai Strategic Holdings, Inc. Fibrous filtration material for electronic smoking article
US10681937B2 (en) 2017-06-07 2020-06-16 Rai Strategic Holdings, Inc. Fibrous filtration material for electronic smoking article
EP4311440A2 (de) 2017-06-07 2024-01-31 RAI Strategic Holdings, Inc. Faseriges filtrationsmaterial für elektronischen rauchartikel

Also Published As

Publication number Publication date
AU2012286157A1 (en) 2014-01-16
BR112014000826A2 (pt) 2017-02-21
CN103649388A (zh) 2014-03-19
EP2546395A1 (de) 2013-01-16
JP2014524987A (ja) 2014-09-25
EP2732082A1 (de) 2014-05-21
CA2839234A1 (en) 2013-01-24
KR20140037209A (ko) 2014-03-26
WO2013010761A1 (de) 2013-01-24

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AS Assignment

Owner name: KELHEIM FIBRES GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BERNT, INGO;NORTH, MATTHEW;ROTHENBACHER, REINHOLD;AND OTHERS;SIGNING DATES FROM 20140109 TO 20140113;REEL/FRAME:031966/0567

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION