EP2546395A1 - Regenerated cellulose fibre - Google Patents
Regenerated cellulose fibre Download PDFInfo
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- EP2546395A1 EP2546395A1 EP20110174140 EP11174140A EP2546395A1 EP 2546395 A1 EP2546395 A1 EP 2546395A1 EP 20110174140 EP20110174140 EP 20110174140 EP 11174140 A EP11174140 A EP 11174140A EP 2546395 A1 EP2546395 A1 EP 2546395A1
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- Prior art keywords
- fiber
- fibers
- length
- legs
- cellulose fiber
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- 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
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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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
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- 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
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- 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 obtained by the viscose method.
- fibers having a particularly high liquid storage capacity are desirable in order to allow the highest possible absorption capacity of the hygiene product.
- Prior art fiber materials commonly used to make tampons are ordinary viscose fibers, so-called trilobal viscose fibers, and cotton.
- the specific absorbent capacity of these fibers is about 4.0 g / g for cotton, 4.5 g / g for ordinary viscose, and 5.2 g / g for trilobal viscose fibers according to the so-called Syngina test described below.
- the goal of the tampon manufacturer is to achieve a certain degree of absorption with a minimum of fiber material and costs.
- TSS toxic shock syndrome
- hollow fibers and collapsed hollow fibers are difficult to produce because of their high water retention capacity, which causes the fibers to swell greatly during washing and stick together due to the formation of hydrogen bonds during drying, rendering them fragile when dry when wet soapy and difficult to break up and process into a carded fabric.
- the production of multi-legged viscose fibers was, for example, in the U.S. Patents 5,634,914 and 5,458,835 and in the EP-A1 0 301 874 described.
- the process disclosed therein describes spinning a commonly used viscose, which may contain a certain amount of a modifier known in the art, through extrusion holes of multi-limbed, in particular trilobal, form into a conventional spin bath.
- the essential feature of this method 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 these documents, the geometry of the spinneret hole determines the shape of the fiber cross-section, and by a corresponding design of the extrusion holes a certain length-to-width ratio of the fiber cross-section can be obtained.
- multi-legged fibers have increased absorbency compared to viscose fibers of the prior art, especially in tampons, and that such fibers must have at least 3 legs and each leg of these fibers Length-to-width ratio of at least 2: 1, most preferably from 3: 1 1 to 5: 1, must have.
- a solid regenerated standard viscose fiber which has a cross section whose area is larger than the area by a factor of less than 2.50 times, preferably less than 2.40 times, more preferably less than 2.25 times of the largest equilateral triangle inscribed in this cross section and which has a subsequently defined Syngina absorbance of greater than 6.0 g / g fiber.
- the WO 2004/005595 A describes a standard absorbent viscose fiber having an irregular lobed cross section.
- Other viscose fibers with irregular cross section are in the US 4,129,679 and the GB-A 1,333,047 described.
- the US 6,403,217B1 describes various nozzle configurations for the production of fibers with modified fiber cross sections by the melt spinning method. Melt spinning processes are fundamentally different from the wet-spinning process used in the viscose process.
- the capillarity in the known from the prior art Y-fibers is relatively low.
- the formation of a larger number but smaller cavities would be advantageous.
- a regenerated cellulose fiber is provided according to the invention, the cross-section of which has an elongate, substantially flat section, and which is characterized in that at least one leg branches off from the elongated section, the length of which is at most 40%. the length of the elongated section is.
- the object of the invention is also achieved by a fiber bundle which contains a multiplicity of cellulose fibers according to the invention.
- a cellulosic fiber whose cross-section has a substantially flat, elongate section with at least one leg protruding therefrom can advantageously influence the pore size of products made from a plurality of such fibers compared to trilobal fibers.
- the leg is preferably arranged at substantially right angles to the elongate portion.
- Particularly preferred embodiments are those in which a plurality of branching legs are provided.
- the legs can advantageously branch off from the elongated portion in both directions.
- the total length of the branching legs does not exceed the length of the elongated portion.
- At least a portion of the legs may have a length to width ratio of 2: 1 to 10: 1.
- At least a part of the legs preferably all legs, can / have a smaller width than the width of the flat section.
- the total curvature of the flat portion is preferably at most 120 °. Even with spiders through nozzles with a flat spinning opening, a certain curvature can result in the resulting flat fibers (or in the flat section provided according to the invention).
- the curvature used here is the angle defined by the end points of the flat section and the point of the flat section furthest from the imaginary straight line through these end points.
- the fiber titer of the fiber according to the invention can be from 1.3 dtex to 10 dtex.
- the cellulose fiber of the present invention may be in the form of staple fiber, short fiber or filament tow.
- the invention also relates to a fiber bundle which contains 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 present in the form of a cellulose fiber according to the invention.
- substantially all of the multibody cellulose fibers contained can also be present in the form of a cellulose fiber according to the invention.
- fiber bundle is meant a plurality of fibers, e.g. Cell wool (a variety of staple fibers), a strand of continuous filaments or a bale of fibers.
- substantially all of the multi-limbed cellulose fiber contained in the fiber bundle are present in the form of the cellulose fiber according to the invention or the cross-sections of the multi-limbed cellulose fibers contained in the fiber bundle are substantially the same.
- the fiber bundle may comprise further fibers, e.g. non-multifilament cellulose fibers, but also fibers of other provenance, e.g. from other polymers.
- the method of the invention may comprise the step of mixing the fibers made by the process with other fibers, e.g. conventional multi-limb fibers, non-multifilament fibers and / or fibers of other provenance, e.g. from other polymers.
- other fibers e.g. conventional multi-limb fibers, non-multifilament fibers and / or fibers of other provenance, e.g. from other polymers.
- the smaller angle between leg and slot-shaped portion is between 30 ° and 90 °, more preferably between 60 ° and 90 °.
- the inventive method is preferably designed such that the spinneret has a plurality of openings, wherein all openings have a substantially same same shape. This will e.g. in a fiber bundle, which consists of fibers according to the invention, the preferred embodiment that all fibers have substantially the same cross-section achieved.
- the invention also relates to the use of the regenerated cellulose fiber or fiber bundle according to the invention in absorbent products, Sanitary articles, in particular tampons, incontinence products, sanitary napkins and pantyliners, filling materials for comforters, pillows and sleeping bags, food packaging, in particular for meat products, papers, in particular filter papers, flock, clothing, in particular nonwovens and apparel textiles for moisture management mixed with other fibers or as a multi-layered construction, and wound dressings.
- FIG. 1 shows the attachment of two conventional Y-fibers 1, 2 and the pore structure formed thereby.
- a smaller pore size can now be achieved by a suitable arrangement and dimensioning of at least one, preferably a plurality of, legs deviating from the elongated section.
- FIG. 3 shows a preferred embodiment of a fiber 1 "according to the invention with an elongate portion 3 and several of them in the case of FIG. 3
- This fiber may be made by spinning a viscose spinning material through a spinning orifice having a corresponding configuration (ie, a slit-shaped portion and branch-like portions branching from this portion) at substantially right angles to the elongate portion 3.
- the length of the legs 4, 5, 6, 7 is, as in FIG. 3 each less than 40% of the length of the elongated section.
- the width of the legs is in each case smaller than the width of the elongated section.
- the legs of the structure of the invention fabric act as spacers, which in the juxtaposition of several such fibers (see FIG. 4 ) causes the formation of a large number of very fine capillaries.
- the legs also act as a reinforcement and spacer, preventing bending of the fiber across the thinner axis of the flat fiber part. In this way, a high absorption capacity is ensured.
- Another advantage of the fiber according to the invention is that in the large number of spaces between the legs of a fiber water is stored by adhesive forces particularly advantageous, which in FIG. 5 is pictured. Structures of the fibers according to the invention thus have 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)
Abstract
Description
Die vorliegende Erfindung betrifft eine regenerierte Cellulosefaser, die durch das Viskoseverfahren erhalten wird.The present invention relates to a regenerated cellulose fiber obtained by the viscose method.
Für Hygieneanwendungen wie zum Beispiel Tampons oder Saugkörper im Allgemeinen sind Fasern mit besonders hohem Flüssigkeitsspeichervermögen wünschenswert, um so eine möglichst hohe Absorptionskapazität des Hygieneprodukts zu ermöglichen.For hygiene applications such as tampons or absorbent articles in general, fibers having a particularly high liquid storage capacity are desirable in order to allow the highest possible absorption capacity of the hygiene product.
Fasermaterialien nach dem Stand der Technik, die üblicherweise zur Herstellung von Tampons verwendet werden, sind gewöhnliche Viskosefasern, sogenannte trilobale Viskosefasern und Baumwolle. Das spezifische Absorptionsvermögen dieser Fasern beträgt nach dem weiter unten beschriebenen sogenannten Syngina-Test ungefähr 4,0 g/g für Baumwolle, 4,5 g/g für gewöhnliche Viskose und 5,2 g/g für trilobale Viskosefasern.Prior art fiber materials commonly used to make tampons are ordinary viscose fibers, so-called trilobal viscose fibers, and cotton. The specific absorbent capacity of these fibers is about 4.0 g / g for cotton, 4.5 g / g for ordinary viscose, and 5.2 g / g for trilobal viscose fibers according to the so-called Syngina test described below.
Das Ziel der Tamponhersteller besteht darin, mit einem minimalen Aufwand an Fasermaterial und Kosten einen bestimmten Absorptionsgrad zu erzielen.The goal of the tampon manufacturer is to achieve a certain degree of absorption with a minimum of fiber material and costs.
Während Baumwolle wegen ihres ungenügenden Absorptionsvermögens als Fasermaterial für Tampons langsam ausgedient hat, sind trilobale Fasern im Vergleich zur gewöhnlichen Viskose viel teurer in der Herstellung und viel schwieriger zu Tampons zu verarbeiten.While cotton has slowly become obsolete because of its insufficient absorbency as a tampon fiber material, trilobal fibers are much more expensive to manufacture than conventional viscose and much more difficult to process into tampons.
Über viele verschiedene Ansätze zur Steigerung des Absorptionsvermögens von Cellulosefasern wurde berichtet:
- 1. eine chemische Veränderung durch das Aufpfropfen von Monomeren auf die Cellulosefaser
- 2. eine chemische Veränderung durch den Einbau von absorbierenden Polymeren wie Carboxymethylcellulose, Chitosan, Cellulosecarbamat, Alginat oder Guaran in die Cellulosefasermatrix
- 3. eine physikalische Veränderung der Fasern, wie z.B. Hohlfasern oder zusammengefallene Hohlfasern, wie beispielsweise aus der
US-A 4,129,679 - 4. mehrschenkelige Fasern (sogenannte "trilobale" Fasern), die durch die Verwendung von Spinndüsen mit mehrschenkeligen Extrusionslöchern mit zumindest 3 Schenkeln mit einem Länge-Breite-Verhältnis von 2:1 1 zu 10:1 1 erhalten werden, wie beispielsweise aus der
EP-A1 0 301 874
- 1. a chemical change by the grafting of monomers on the cellulose fiber
- 2. a chemical change due to incorporation of absorbent polymers such as carboxymethylcellulose, chitosan, cellulose carbamate, alginate or guaran into the cellulosic fiber matrix
- 3. a physical change of the fibers, such as hollow fibers or collapsed hollow fibers, such as from
US-A 4,129,679 - 4. multi-limbed fibers (so-called "trilobal" fibers), which are obtained by the use of spinnerets with multi-limbed extrusion holes with at least 3 legs with a length-to-width ratio of 2: 1 1 to 10: 1 1, such as from
EP-A1 0 301 874
Der Nachteil einer chemischen Veränderung der Cellulosefaser besteht darin, dass für sehr empfindliche medizinische Anwendungen wie jener von Tampons ein kostspieliges und zeitaufwendiges toxikologisches und physiologisches Testverfahren nötig ist und das Auftreten des toxischen Schocksyndroms (TSS) die meisten Tamponhersteller von der Verwendung chemisch modifizierter Fasermaterialien abhält, obwohl die Chemikalien als sicher gelten mögen.The disadvantage of a chemical change in the cellulosic fiber is that very delicate medical applications such as tampons require a costly and time-consuming toxicological and physiological test procedure, and the occurrence of toxic shock syndrome (TSS) discourages most tampon manufacturers from using chemically modified fiber materials. although the chemicals may be considered safe.
Der Nachteil von Hohlfasern und zusammengefallenen Hohlfasern besteht darin, dass sie wegen ihres hohen Wasserrückhaltevermögens schwierig herzustellen sind, aufgrund dessen die Fasern während des Waschens stark anschwellen und wegen der Bildung von Wasserstoffbrücken während des Trocknens aneinanderkleben, was sie im trockenen Zustand brüchig, im nassen Zustand seifig und es schwierig macht, sie aufzubrechen und in ein kardiertes Gewebe zu verarbeiten.The disadvantage of hollow fibers and collapsed hollow fibers is that they are difficult to produce because of their high water retention capacity, which causes the fibers to swell greatly during washing and stick together due to the formation of hydrogen bonds during drying, rendering them fragile when dry when wet soapy and difficult to break up and process into a carded fabric.
Die Verwendung von mehrschenkelige, insbesondere trilobalen Fasern erfuhr während der letzten Jahre eine stetige Zunahme.The use of multi-limbed, in particular trilobal, fibers has experienced a steady increase in recent years.
Die Herstellung mehrschenkeliger Viskosefasern wurde beispielsweise in den
Der Stand der Technik bezüglich mehrschenkeliger Fasern lehrt überdies, dass derartige mehrschenkelige Fasern im Vergleich zu Viskosefasern nach dem Stand der Technik ein gesteigertes Absorptionsvermögen besitzen, und zwar insbesondere in Tampons, und dass solche Fasern zumindest 3 Schenkel haben müssen und dass jeder Schenkel dieser Fasern ein Länge-Breite-Verhältnis von zumindest 2:1, am meisten bevorzugt von 3:1 1 bis 5:1, aufweisen muss. Je größer das Länge-Breite-Verhältnis ist, desto höher wären der Anteil an freiem Volumen und das Absorptionsvermögen der Fasern, vorausgesetzt, dass die Schenkel nicht so lang und dünn sind, dass sie sich auf sich selbst zurückbiegen.The prior art with respect to multi-legged fibers also teaches that such multi-limbed fibers have increased absorbency compared to viscose fibers of the prior art, especially in tampons, and that such fibers must have at least 3 legs and each leg of these fibers Length-to-width ratio of at least 2: 1, most preferably from 3: 1 1 to 5: 1, must have. The larger the length-to-width ratio, the higher would be the proportion of free volume and the absorbency of the fibers, provided that the legs are not so long and thin that they bend back on themselves.
In diesen Dokumenten ist auch erwähnt, dass unter den Bedingungen eines langsamen Regenerationsspinnens sogar noch höhere Absorptionsvermögen der mehrschenkeligen Fasern erzielt werden können, z.B. durch Absenken des Säurepegels und/oder Erhöhen des Sulfatpegels und/oder Zugabe eines Viskosemodifikators.It is also mentioned in these documents that under the conditions of slow regeneration spinning even higher absorbency of the multi-limb fibers can be achieved, e.g. by lowering the acid level and / or increasing the sulfate level and / or adding a viscous modifier.
Die Tatsache, dass Hohlräume im Querschnitt von Viskosefasern das Absorptionsvermögen dieser Fasern und der daraus hergestellten Produkte erhöhen, ist weiters aus der
Aus der
Die
Die
Herkömmliche trilobale Fasern, wie aus
Durch die grobe Porenstruktur ist die Kapillarität in den aus den nach dem Stand der Technik bekannten Y-Fasern relativ gering. Für Saugkörper mit einer schnelleren Ansaugleistung und besserer Verteilungswirkung wäre die Ausbildung einer größeren Zahl dafür aber kleinerer Hohlräume vorteilhaft.Due to the coarse pore structure, the capillarity in the known from the prior art Y-fibers is relatively low. For absorbent body with a faster suction and better distribution effect, the formation of a larger number but smaller cavities would be advantageous.
Zur Überwindung der genannten Nachteile von bekannten saugfähigen Viskosefasern wird erfindungsgemäß eine regenerierte Cellulosefaser zur Verfügung gestellt, deren Querschnitt einen länglichen, im wesentlichen flachen Abschnitt aufweist, und welche dadurch gekennzeichnet ist, dass von dem länglichen Abschnitt zumindest ein Schenkel abzweigt, dessen Länge maximal 40% der Länge des länglichen Abschnittes beträgt.In order to overcome the mentioned disadvantages of known absorbent viscose fibers, a regenerated cellulose fiber is provided according to the invention, the cross-section of which has an elongate, substantially flat section, and which is characterized in that at least one leg branches off from the elongated section, the length of which is at most 40%. the length of the elongated section is.
Die Aufgabe der Erfindung wird auch durch ein Faserbündel gelöst, welches eine Vielzahl von erfindungsgemäßen Cellulosefasern enthält.The object of the invention is also achieved by a fiber bundle which contains a multiplicity of cellulose fibers according to the invention.
Weitere Aspekte der vorliegenden Erfindung betreffen ein Verfahren zur Herstellung der erfindungsgemäßen Cellulosefaser sowie die Verwendung der erfindungsgemäßen Cellulosefaser sowie des erfindungsgemäßen Faserbündels.Further aspects of the present invention relate to a process for the preparation of the cellulose fiber according to the invention and to the use of the cellulose fiber according to the invention and of the fiber bundle according to the invention.
-
Figur 1 zeigt die Anlagerung zweier beispielsweise aus derEP 0 301 874 FIG. 1 shows the attachment of two example, from theEP 0 301 874 -
Figur 2 zeigt die Anlagerungen mehrerer Fasern mit flachem Querschnitt.FIG. 2 shows the deposits of several fibers with a flat cross-section. -
Figur 3 zeigt den Querschnitt einer erfindungsgemäßen Faser.FIG. 3 shows the cross section of a fiber according to the invention. -
Figur 4 zeigt die Anlagerungen mehrerer erfindungsgemäßer Fasern.FIG. 4 shows the deposits of several inventive fibers. -
Figur 5 zeigt das Zurückhalten von Wasser durch eine erfindungsgemäße Faser.FIG. 5 shows the retention of water by a fiber according to the invention.
Es wurde gefunden, dass eine Cellulosefaser, deren Querschnitt einen im wesentlichen flachen, länglichen Abschnitt mit zumindest einem davon abstehenden Schenkel aufweist, die Porengröße von aus einer Vielzahl solcher Fasern hergestellten Produkten im Vergleich zu trilobalen Fasern vorteilhaft beeinflusst werden kann.It has been found that a cellulosic fiber whose cross-section has a substantially flat, elongate section with at least one leg protruding therefrom can advantageously influence the pore size of products made from a plurality of such fibers compared to trilobal fibers.
Der Schenkel ist bevorzugt in im wesentlichen rechten Winkel zum länglichen Abschnitt angeordnet.The leg is preferably arranged at substantially right angles to the elongate portion.
Besonders bevorzugt sind Ausführungsformen, bei denen mehrere abzweigende Schenkel vorgesehen sind.Particularly preferred embodiments are those in which a plurality of branching legs are provided.
Die Schenkel können dabei vorteilhafterweise vom länglichen Abschnitt in beiden Richtungen abzweigen.The legs can advantageously branch off from the elongated portion in both directions.
Ebenfalls bevorzugt übersteigt die Gesamtlänge der abzweigenden Schenkel die Länge des länglichen Abschnittes nicht.Also preferably, the total length of the branching legs does not exceed the length of the elongated portion.
Zumindest ein Teil der Schenkel, bevorzugt alle Schenkel, kann/können ein Verhältnis von Länge zu Breite von 2:1 1 bis 10:1 1 aufweisen.At least a portion of the legs, preferably all legs, may have a length to width ratio of 2: 1 to 10: 1.
Zumindest ein Teil der Schenkel, bevorzugt alle Schenkel, kann/können eine geringere Breite als die Breite des flachen Abschnittes aufweisen.At least a part of the legs, preferably all legs, can / have a smaller width than the width of the flat section.
Die gesamte Krümmung des flachen Abschnittes beträgt bevorzugt maximal 120°. Selbst bei Spinnen durch Düsen mit flacher Spinnöffnung kann sich bei den resultierenden Flachfasern (bzw. beim erfindungsgemäß vorgesehenen flachen Abschnit) eine gewisse Krümmung ergeben. Als Krümmung wird dabei der Winkel angesehen, der durch die Endpunkte des flachen Abschnittes sowie den am weitesten von der gedachten Gerade durch diese Endpunkte entfernt liegenden Punkt des flachen Abschnittes definiert wird.The total curvature of the flat portion is preferably at most 120 °. Even with spiders through nozzles with a flat spinning opening, a certain curvature can result in the resulting flat fibers (or in the flat section provided according to the invention). The curvature used here is the angle defined by the end points of the flat section and the point of the flat section furthest from the imaginary straight line through these end points.
Der Fasertiter der erfindungsgemäßen Faser kann von 1,3 dtex bis 10 dtex betragen.The fiber titer of the fiber according to the invention can be from 1.3 dtex to 10 dtex.
Die erfindungsgemäße Cellulosefaser kann in Form einer Stapelfaser, Kurzschnittfaser oder als Filamentkabel vorliegen.The cellulose fiber of the present invention may be in the form of staple fiber, short fiber or filament tow.
Die Erfindung betrifft auch ein Faserbündel, welches enthaltend eine Vielzahl von regenerierten mehrschenkeligen Cellulosefasern, wobei zumindest 10% , bevorzugt zumindest 20%, besonders bevorzugt zumindest 50%der mehrschenkeligen Cellulosefasern in Form einer erfindungsgemäßen Cellulosefaser vorliegen. Im erfindungsgemäßen Faserbündel können auch im wesentlichen alle der enthaltenenen mehrschenkeligen Cellulosefasern in Form einer erfindungsgemäßen Cellulosefaser vorliegen.The invention also relates to a fiber bundle which contains 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 present in the form of a cellulose fiber according to the invention. In the fiber bundle according to the invention, substantially all of the multibody cellulose fibers contained can also be present in the form of a cellulose fiber according to the invention.
Als "Faserbündel" ist eine Vielzahl von Fasern zu verstehen, so z.B. Zellwolle (eine Vielzahl von Stapelfasern), ein Strang von Endlosfilamenten oder ein Ballen aus Fasern.By "fiber bundle" is meant a plurality of fibers, e.g. Cell wool (a variety of staple fibers), a strand of continuous filaments or a bale of fibers.
Bevorzugt liegen im wesentlichen alle der im Faserbündel enthaltenen mehrschenkeligen Cellulosefaser in Form der erfindungsgemäßen Cellulosefaser vor bzw. sind die Querschnitte der im Faserbündel enthaltenen mehrschenkeligen Cellulosefasern im wesentlichen gleich.Preferably, substantially all of the multi-limbed cellulose fiber contained in the fiber bundle are present in the form of the cellulose fiber according to the invention or the cross-sections of the multi-limbed cellulose fibers contained in the fiber bundle are substantially the same.
Das Faserbündel kann weitere Fasern, z.B. nicht mehrschenkelige Cellulosefasern, aber auch Fasern anderer Provenienz, wie z.B. aus anderen Polymeren, enthalten.The fiber bundle may comprise further fibers, e.g. non-multifilament cellulose fibers, but also fibers of other provenance, e.g. from other polymers.
Das erfindungsgemäße Verfahren zur Herstellung einer regenerierten Cellulosefaser bzw. eines Faserbündels gemäß einem der vorhergehenden Ansprüche umfasst die Schritte
- Bereitstellen einer Viskosespinnmasse
- Verspinnen der Viskosespinnmasse durch zumindest eine Öffnung einer Spinndüse in ein Spinnbad unter Bildung von Spinnfäden,
und ist dadurch gekennzeichnet, dass die Öffnung der Spinndüse einen schlitzförmigen Abschnitt aufweist, von welchem zumindest ein Schenkel abzweigt, dessen Länge maximal 40% der Länge des schlitzförmigen Abschnittes beträgt.
- Providing a Viskosepinnmasse
- Spinning the viscose spinning mass through at least one opening of a spinneret into a spinning bath to form filaments,
and is characterized in that the opening of the spinneret has a slit-shaped portion from which branches off at least one leg whose length is not more than 40% of the length of the slit-shaped portion.
Optional kann das erfindungsgemäße Verfahren den Schritt des Mischens der mittels des Verfahrens hergestellten Fasern mit anderen Fasern, z.B. herkömmlichen mehrschenkeligen Fasern, nicht mehrschenkeligen Fasern und/oder Fasern anderer Provenienz, wie z.B. aus anderen Polymeren, umfassen.Optionally, the method of the invention may comprise the step of mixing the fibers made by the process with other fibers, e.g. conventional multi-limb fibers, non-multifilament fibers and / or fibers of other provenance, e.g. from other polymers.
Bevorzugt liegt der kleinere Winkel zwischen Schenkel und schlitzförmigemAbschnitt zwischen 30° und 90°, besonders bevorzugt zwischen 60° und 90°.Preferably, the smaller angle between leg and slot-shaped portion is between 30 ° and 90 °, more preferably between 60 ° and 90 °.
Das erfindungsgemäße Verfahren ist bevorzugt dahingehend ausgestaltet, dass die Spinndüse mehrere Öffnungen aufweist, wobei sämtliche Öffnungen eine im wesentlichen gleiche gleiche Form aufweisen. Dadurch wird z.B. in einem Faserbündel, welche aus erfindungsgemäßen Fasern besteht, die bevorzugte Ausgestaltung, dass alle Fasern im wesentlichen den gleichen Querschnitt aufweisen, erreicht.The inventive method is preferably designed such that the spinneret has a plurality of openings, wherein all openings have a substantially same same shape. This will e.g. in a fiber bundle, which consists of fibers according to the invention, the preferred embodiment that all fibers have substantially the same cross-section achieved.
Die Erfindung betrifft auch die Verwendung der erfindungsgemäßen regenerierten Cellulosefaser bzw. des erfindungsgemäßen Faserbündels in absorbierenden Produkten, Hygieneartikeln, insbesondere Tampons, Inkontinenzprodukten, Hygienebinden und Pantylinern, Füllmaterialien für Bettdecken, Kissen und Schlafsäcke, Verpackungen für Lebensmitteln, insbesondere für Fleischprodukte, Papieren, insbesondere Filterpapieren, Flock, Bekleidung, insbesondere Inlay-Vliesen und Bekleidungstextilien für das Feuchtemanagement in Mischung mit anderen Fasern oder als mehrschichtige Konstruktion, und Wundauflagen.The invention also relates to the use of the regenerated cellulose fiber or fiber bundle according to the invention in absorbent products, Sanitary articles, in particular tampons, incontinence products, sanitary napkins and pantyliners, filling materials for comforters, pillows and sleeping bags, food packaging, in particular for meat products, papers, in particular filter papers, flock, clothing, in particular nonwovens and apparel textiles for moisture management mixed with other fibers or as a multi-layered construction, and wound dressings.
Nach dem Stand der Technik sind Y-Fasern für die Herstellung von Saugkörpern mit hoher Absorptionskapazität bekannt. Durch die hier vorhandenen Flügel werden die Faserzentren in einem großen Abstand zueinander gehalten, so dass Strukturen mit einem großen Flüssigkeitsspeichervermögen entstehen. Durch die Größe der gebildeten Poren ist die Kapillarität allerdings begrenzt.
Ebenfalls bekannt nach dem Stand der Technik ist die Herstellung von Fasern mit flachem Querschnitt. Die alleinige Verwendung von Flachfasern für Saugkörper ist nicht bevorzugt, da diese bedingt durch ihre Struktur sehr dicht aneinanderliegen können und die so gebildeten Strukturen nur eine geringe Absorptionsfähigkeit haben, siehe
Ein weiteres Problem von Flachfasern besteht darin, dass diese relativ leicht um ihre dünnere Achse geknickt werden können. Hohlräume in flüssigkeitsbeladenen Saugkörpern kollabieren daher leicht.Another problem of flat fibers is that they can be relatively easily kinked about their thinner axis. Cavities in liquid-loaded absorbent bodies therefore collapse easily.
In der erfindungsgemäßen Faser kann nun eine kleinere Porengröße durch eine geeignete Anordnung und Dimensionierung zumindest eines, bevorzugt mehrerer vom länglichen Abschnitt abweichender Schenkel erreicht werden.In the fiber according to the invention, a smaller pore size can now be achieved by a suitable arrangement and dimensioning of at least one, preferably a plurality of, legs deviating from the elongated section.
Die Länge der Schenkel 4, 5, 6, 7 beträgt, wie in
Bei der Faserverarbeitung nach dem Stand der Technik werden die Fasern zu einem bestimmten Anteil parallelisiert. Die nachfolgende Betrachtung geht daher zunächst von parallelisierten Fasern aus.In the prior art fiber processing, the fibers are parallelized to a certain extent. The following analysis therefore starts with parallelized fibers.
Die Schenkel der erfindungsgemäßen Faser hergestellten Struktur wirken als Abstandshalter, welche beim Aneinanderlagern mehrerer solcher Fasern (siehe
Gleichzeitig wirken die Schenkel auch als Verstärkung und Abstandshalter, was ein Verbiegen der Faser über die dünnere Achse des flachen Faserteils verhindert. Auf diese Weise wird eine hohe Absorptionskapazität gewährleistet.At the same time, the legs also act as a reinforcement and spacer, preventing bending of the fiber across the thinner axis of the flat fiber part. In this way, a high absorption capacity is ensured.
Ein weiterer Vorteil der erfindungsgemäßen Faser ist, dass in der großen Zahl der Zwischenräume zwischen den Schenkel einer Faser Wasser durch Adhäsionskräfte besonders vorteilhaft gespeichert wird, was in
Claims (15)
dadurch gekennzeichnet, dass die Öffnung der Spinndüse einen schlitzförmigen Abschnitt aufweist, von welchem zumindest ein Schenkel abzweigt, dessen Länge maximal 40% der Länge des schlitzförmigen Abschnittes beträgt.
characterized in that the opening of the spinneret has a slot-shaped portion, from which branches off at least one leg whose length is not more than 40% of the length of the slot-shaped portion.
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20110174140 EP2546395A1 (en) | 2011-07-15 | 2011-07-15 | Regenerated cellulose fibre |
CA 2839234 CA2839234A1 (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
KR20147000669A KR20140037209A (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
PCT/EP2012/062376 WO2013010761A1 (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
CN201280035135.0A CN103649388A (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
EP12730931.8A EP2732082A1 (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
JP2014519487A JP2014524987A (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
AU2012286157A AU2012286157A1 (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
US14/232,828 US20140147616A1 (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
BR112014000826A BR112014000826A2 (en) | 2011-07-15 | 2012-06-26 | regenerated cellulose fiber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP20110174140 EP2546395A1 (en) | 2011-07-15 | 2011-07-15 | Regenerated cellulose fibre |
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EP2546395A1 true EP2546395A1 (en) | 2013-01-16 |
Family
ID=46420165
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP20110174140 Withdrawn EP2546395A1 (en) | 2011-07-15 | 2011-07-15 | Regenerated cellulose fibre |
EP12730931.8A Withdrawn EP2732082A1 (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP12730931.8A Withdrawn EP2732082A1 (en) | 2011-07-15 | 2012-06-26 | Regenerated cellulose fiber |
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US (1) | US20140147616A1 (en) |
EP (2) | EP2546395A1 (en) |
JP (1) | JP2014524987A (en) |
KR (1) | KR20140037209A (en) |
CN (1) | CN103649388A (en) |
AU (1) | AU2012286157A1 (en) |
BR (1) | BR112014000826A2 (en) |
CA (1) | CA2839234A1 (en) |
WO (1) | WO2013010761A1 (en) |
Families Citing this family (4)
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EP2546397A1 (en) * | 2011-07-15 | 2013-01-16 | Kelheim Fibres GmbH | Regenerated cellulose fibre |
CN106633980A (en) * | 2016-12-05 | 2017-05-10 | 芜湖天鸿汽车零部件有限公司 | Filling material of car cushion and preparation method of filling material |
US10383369B2 (en) | 2017-06-07 | 2019-08-20 | Rai Strategic Holdings, Inc. | Fibrous filtration material for electronic smoking article |
CN115652456A (en) * | 2022-11-12 | 2023-01-31 | 广东格菲林卫材科技有限公司 | Profiled cross-section fiber, non-woven fabric and spinneret plate |
Citations (8)
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 |
US4362159A (en) | 1980-10-15 | 1982-12-07 | Kao Soap Co., Ltd. | Tampon |
EP0301874A1 (en) | 1987-07-30 | 1989-02-01 | Courtaulds Plc | Cellulosic fibre |
WO1989001062A1 (en) * | 1987-07-30 | 1989-02-09 | Courtaulds Plc | Cellulosic fibre |
US6403217B1 (en) | 1996-08-22 | 2002-06-11 | Clemson University Research Foundation | Bundles of fibers useful for moving liquids at high fluxes and acquisition/distribution structures that use the bundles |
WO2004005595A1 (en) | 2002-07-09 | 2004-01-15 | Lenzing Aktiengesellschaft | Process for the manufacture of solid regenerated viscose fibres |
WO2004085720A1 (en) | 2003-03-27 | 2004-10-07 | Lenzing Aktiengesellschaft | Solid regenerated standard viscose fibres |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2280098A1 (en) * | 2009-07-31 | 2011-02-02 | Kelheim Fibres GmbH | Regenerated cellulose fibre |
-
2011
- 2011-07-15 EP EP20110174140 patent/EP2546395A1/en not_active Withdrawn
-
2012
- 2012-06-26 CA CA 2839234 patent/CA2839234A1/en not_active Abandoned
- 2012-06-26 EP EP12730931.8A patent/EP2732082A1/en not_active Withdrawn
- 2012-06-26 WO PCT/EP2012/062376 patent/WO2013010761A1/en active Application Filing
- 2012-06-26 BR BR112014000826A patent/BR112014000826A2/en not_active IP Right Cessation
- 2012-06-26 JP JP2014519487A patent/JP2014524987A/en active Pending
- 2012-06-26 KR KR20147000669A patent/KR20140037209A/en not_active Application Discontinuation
- 2012-06-26 CN CN201280035135.0A patent/CN103649388A/en active Pending
- 2012-06-26 AU AU2012286157A patent/AU2012286157A1/en not_active Abandoned
- 2012-06-26 US US14/232,828 patent/US20140147616A1/en not_active Abandoned
Patent Citations (10)
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 |
US4362159A (en) | 1980-10-15 | 1982-12-07 | Kao Soap Co., Ltd. | Tampon |
EP0301874A1 (en) | 1987-07-30 | 1989-02-01 | Courtaulds Plc | Cellulosic fibre |
WO1989001062A1 (en) * | 1987-07-30 | 1989-02-09 | Courtaulds Plc | Cellulosic fibre |
US5458835A (en) | 1987-07-30 | 1995-10-17 | Courtaulds Plc | Process of making viscose staple fibers |
US5634914A (en) | 1987-07-30 | 1997-06-03 | Courtaulds Plc | Cellulosic fibre |
US6403217B1 (en) | 1996-08-22 | 2002-06-11 | Clemson University Research Foundation | Bundles of fibers useful for moving liquids at high fluxes and acquisition/distribution structures that use the bundles |
WO2004005595A1 (en) | 2002-07-09 | 2004-01-15 | Lenzing Aktiengesellschaft | Process for the manufacture of solid regenerated viscose fibres |
WO2004085720A1 (en) | 2003-03-27 | 2004-10-07 | Lenzing Aktiengesellschaft | Solid regenerated standard viscose fibres |
Also Published As
Publication number | Publication date |
---|---|
BR112014000826A2 (en) | 2017-02-21 |
KR20140037209A (en) | 2014-03-26 |
CA2839234A1 (en) | 2013-01-24 |
WO2013010761A1 (en) | 2013-01-24 |
US20140147616A1 (en) | 2014-05-29 |
JP2014524987A (en) | 2014-09-25 |
EP2732082A1 (en) | 2014-05-21 |
AU2012286157A1 (en) | 2014-01-16 |
CN103649388A (en) | 2014-03-19 |
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