EP1896635A1 - Vliesstoffe, verfahren zu deren herstellung sowie deren verwendung - Google Patents
Vliesstoffe, verfahren zu deren herstellung sowie deren verwendungInfo
- Publication number
- EP1896635A1 EP1896635A1 EP06754593A EP06754593A EP1896635A1 EP 1896635 A1 EP1896635 A1 EP 1896635A1 EP 06754593 A EP06754593 A EP 06754593A EP 06754593 A EP06754593 A EP 06754593A EP 1896635 A1 EP1896635 A1 EP 1896635A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nonwoven fabric
- fibers
- nozzle
- cellulose
- water
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
-
- 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
- D01D5/06—Wet spinning methods
-
- 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
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
-
- 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
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/015—Natural yarns or filaments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
-
- 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
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/68—Melt-blown nonwoven fabric
Definitions
- the invention relates to a process for producing nonwovens, in which a solution of cellulose carbamate in N-methylmorpholine N-oxide is forced through the holes of a nozzle beam and is stretched by a multiple air flow.
- the formed fiber curtain is placed on a perforated conveyor belt, washed and dried.
- the invention relates to such nonwoven fabrics and their use.
- Nonwovens are textile fabrics in which the surface formation does not take place by weaving or knitting, but by entanglement of the fibers with subsequent fixation. Nonwovens still have high annual growth rates due to their versatility and comparatively low production costs compared to knitted and woven fabrics.
- the advantages of these nonwoven materials are their high moisture absorption, the manufacturing processes allow a high variability in density and thickness and lead to extensive surface isotropy. From these advantageous properties, numerous uses in medicine for hygiene products, such as surgical drapes, bedclothes, wound dressings gauze, etc. arise in the household as wipes of all kinds and as decorative nonwovens, eg tablecloths, napkins, in the clothing industry as a deposit fleeces and also for technical applications, eg insulating mats, cover mats.
- web formation is possible from short fibers, staple fibers or continuous filaments.
- the pile formation for cut fibers is carried out by the dry or wet nonwoven method.
- the staple fibers delivered in bale form are combed by means of carding or carding to fleece and stored on a tape.
- the pile formation takes place by applying a suspension of fiber and water to a perforated screen belt with subsequent squeezing of the water.
- the webs formed can then be further consolidated by needling, thermal and / or chemical treatment or by means of water jet.
- Nonwovens of continuous materials are preferably made of polyester and polypropylene (melt spinning - meltblown nonwovens) and polyacrylonitrile (wet spinning - spunlaid nonwovens).
- Viscose fibers i. Cellulose regenerated fibers are preferably used as short or staple fibers for nonwoven production. Due to their potential properties, nonwovens based on cellulose regenerated fiber have a significant market share with expected continuous growth.
- melts of synthetic polymers by extrusion of the melt through fine nozzle holes into a fiber flow gas stream, through which the fiber is cooled and pulled thereby and stretched to a multiple of its length, is one since A longer known process for nonwoven production.
- This process also referred to as "meltblown", is suitable for the production of microfibers.
- European Patent EP 0 920 548 B1 also describes the use of meltblowing for solutions of cellulose in amine oxides, preferably N-methylmorpholine.
- N-oxide (NMMO) The process is strongly influenced by the viscosity of the cellulose / NMMO solution, which in turn is determined by the polymer (cellulose), the molecular weight (DP of the cellulose) and the concentration.
- Another known, environmentally friendly process for the production of cellulosic fibers and moldings is based on the precipitation of cellulose carbamate from a solution of this cellulose derivative in sodium hydroxide solution (EP 57 105, EP 178 292).
- Cellulose carbamate is formed in the reaction of cellulose with urea at elevated temperature and can be dissolved in cold dilute sodium hydroxide solution.
- a disadvantage for the productivity of all cellulose wet-spinning processes, in particular also the NMMO and the carbamate process is the low solids concentration of the cellulose in the spinning solution, which is usually 8 to 12%.
- this object is achieved by a melt blown process in which a spinning solution is pressed through a nozzle block at elevated temperature, the fibers emerging from the nozzle holes are drawn through a tempered air stream and thereby stretched and cooled and coagulated by spraying with water. Subsequently, the fibers are deposited on a transport device to form a random fabric, wherein the individual fibers are self-binding. The solvent is then removed by washing.
- a special feature of the process is that a solution of cellulose carbamate in N-methylmorpholine-N-oxide is used as the spinning solution.
- the nozzle block used preferably has at least 20, preferably 150 to 1500 and particularly preferably 500 to 1000 nozzle holes per meter of nozzle width.
- diameters of 0.05 to 1 mm and especially of 0.3 to 0.5 mm are preferred.
- the spinning solution temperature in the extrusion is preferably in the range between 80 and 130 0 C, more preferably in the range of 90 to 110 0 C.
- the spinning solution delivery is between 0.25 to 2.5, more preferably 0.75 to 1.5 g per nozzle hole and minute.
- the air stream used for the removal of the fibers from the nozzle is preferably heated to 100 to 190 ° C, particularly preferably in the nozzle interior an air temperature of 120 to 160 0 C set len.
- the pressure generated by the air flow in the nozzle interior is preferably 0.03 to 1.5 bar, more preferably between 0.15 and 0.8 bar.
- the nozzle exit velocity is preferably 1 to 20 m / min, but more preferably 3 to
- the extruded filaments are preferably drawn to 50 to 800 times their length after the nozzle exit, resulting in spinning speeds of up to 10,000 m / min.
- Single fiber diameter significantly smaller than 10 ⁇ m and single fiber titer smaller than 1 dtex can be achieved by the appropriate adjustment of the stretching conditions.
- the fibrous web which forms is sprayed with water or with a NMMO / water mixture having an NMMO content of preferably at most 20%, preferably 5 to 15%, and thus coagulated.
- the batt is laid down on a perforated belt at high speed, which causes the fiber to become entangled and a nonwoven is formed which has such good mechanical properties that the subsequent operations, such as washing with a high-pressure water jet, squeezing and drying without additional solidification of the web can be performed.
- the spinning solution contains from 5 to 20% by weight of cellulose secarbamate.
- the spinning solution contains 20 to 30 wt .-% cellulose carbamate.
- this gives a solution of Cel ⁇ u ⁇ osecarbamat in NMMO, which surprisingly has a lyotropic behavior, ie the cellulose carbamate is present in a liquid crystalline state.
- a cellulose nonwoven fabric is also made of a random knitted fabric or of a finite length resulting from the breakage of single capillaries which can be produced by the process according to one of claims 1 to 17.
- the nonwoven fabrics produced by the claimed process preferably have basis weights between 20 and 500 g, preferably have a water retention capacity of at least 180% and after conditioning longitudinal strengths of at least 350 N / m and in the transverse direction of at least 120 N / m at a basis weight of 33 g / m 2 .
- the nonwoven fabrics according to the invention are preferably used in medicine, in particular as surgical drapes, bed sheets, wound coverings, gauze or cotton wool pads. Likewise, the nonwovens can also be used as hygiene substances or as household wipes. Another field of application of the nonwovens according to the invention are decorative nonwovens, in particular tablecloths, napkins or curtains, as well as nonwoven inserts in the clothing industry.
- Cel ⁇ ulosecarbamat used in an amount that allows a lyotropic solution as described above, it is also possible to use the nonwoven fabrics according to the invention as a reinforcing material.
- cellulose carbamate 180 g of cellulose carbamate (DP-Cuen 453) are mixed in a kneader with 2430 g of a 50% aqueous NMMO solution, this solution was concentrated by distilling off water at a vacuum of 80 mbar to NMMO monohydrate and thereby dissolved the cellulose carbamate.
- the formed spinning solution has a cellulose carbamate content of 12%.
- the Spinnlö- solution of a temperature of 90 0 C is a
- PHK pulp 150 g of PHK pulp (DP-Cuen 840) are mixed in a kneader with 1945 g of a 50% aqueous NMMO solution, this solution by distilling off water at a vacuum of 80 mbar to the NMMO mono- hydrate concentrated while the pulp dissolved.
- the formed spinning solution has a cellulose content of 8%.
- the spinning solution at a temperature of 90 0 C is filtered through a 50 micron filter and pressed by spin pump through a 15 cm wide nozzle with 60 nozzle holes diameter of 0.48 mm with a flow rate of 0.9 g / hole / min.
- the exiting from the nozzle holes at a rate of 4 m / min fibers are produced by flowing past to 125 0 C heated air to the 459fache its length stretched, with a mixture of 7.5% NMMO / 92.5% water, about 20 cm below the nozzle sprayed and deposited on a conveyor belt at a speed of 1 m / min.
- the formed web is washed with a sharp jet of water, squeezed off and dried under tension with the admission of a shrinkage of 12%.
- the formed nonwoven made of regenerated cellulose had the following parameters:
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005029793A DE102005029793B4 (de) | 2005-06-27 | 2005-06-27 | Vliesstoffe, Verfahren zu deren Herstellung sowie deren Verwendung |
PCT/EP2006/006204 WO2007000319A1 (de) | 2005-06-27 | 2006-06-27 | Vliesstoffe, verfahren zu deren herstellung sowie deren verwendung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1896635A1 true EP1896635A1 (de) | 2008-03-12 |
EP1896635B1 EP1896635B1 (de) | 2011-09-28 |
Family
ID=36975523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20060754593 Not-in-force EP1896635B1 (de) | 2005-06-27 | 2006-06-27 | Verfahren zur herstellung von vliesstoffen |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080287025A1 (de) |
EP (1) | EP1896635B1 (de) |
JP (1) | JP2008546928A (de) |
AT (1) | ATE526438T1 (de) |
DE (1) | DE102005029793B4 (de) |
WO (1) | WO2007000319A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT503625B1 (de) | 2006-04-28 | 2013-10-15 | Chemiefaser Lenzing Ag | Wasserstrahlverfestigtes produkt enthaltend cellulosische fasern |
EP2160277A2 (de) | 2007-06-25 | 2010-03-10 | Netstal-Maschinen AG | Vorrichtung und verfahren für das nachkühlen von preformen |
AT505621B1 (de) | 2007-11-07 | 2009-03-15 | Chemiefaser Lenzing Ag | Vefahren zur herstellung eines wasserstrahlverfestigten produktes enthaltend cellulosische fasern |
DE102008018746A1 (de) | 2008-04-14 | 2009-10-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Cellulosecarbamat-Spinnlösung, Verfahren zur Herstellung eines Cellulosecarbamat-Vliesstoffes, Cellulosecarbamat-Vliesstoff sowie Verwendungszwecke |
DE102008018743A1 (de) * | 2008-04-14 | 2009-10-22 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Cellulosecarbamat-Spinnlösung, Cellulosecarbamatfaser sowie Verfahren zu deren Herstellung und Verwendungszwecke |
DE102008018745A1 (de) | 2008-04-14 | 2009-10-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Cellulosecarbamat-Spinnlösung, Cellulosecarbamat-Blasfolie sowie Verfahren zu deren Herstellung und Verwendungsmöglichkeiten |
TWI392780B (zh) * | 2009-12-31 | 2013-04-11 | Wet melt with a mold, antibacterial and deodorant function of cellulose non-woven system | |
TWI392779B (zh) * | 2009-12-31 | 2013-04-11 | A method for preparing natural cellulose nonwoven fabric by wet meltblowing | |
TWI392781B (zh) * | 2009-12-31 | 2013-04-11 | Preparation of Natural Cellulose Nonwoven by Wet Spunbond Method | |
CN102127840B (zh) * | 2010-01-13 | 2014-07-16 | 聚隆纤维股份有限公司 | 使用湿式纺黏方式制备天然纤维素不织布的方法 |
CN102127842B (zh) * | 2010-01-13 | 2014-07-16 | 聚隆纤维股份有限公司 | 使用湿式熔喷方式制备天然纤维素不织布的方法 |
AT511002A1 (de) * | 2011-02-08 | 2012-08-15 | Univ Innsbruck | Verfahren zur verformung von cellulosecarbamat und produkte, die nach diesem verfahren hergestellt werden |
DE102013210432A1 (de) * | 2013-06-05 | 2014-12-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Herstellung eines Polyacryl-basierten Vliesstoffes sowie Polyacryl-basierte Vliesstoffe |
EP3385426A1 (de) * | 2017-04-03 | 2018-10-10 | Lenzing Aktiengesellschaft | Cellulosefaservliesstoff mit erhöhtem wasserhaltevermögen und geringem grundgewicht |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3833438A (en) * | 1972-08-30 | 1974-09-03 | Asahi Chemical Ind | Process for the manufacture of a non-woven web of continuous filaments through the wet stretch spinning method |
FI62318C (fi) * | 1981-01-27 | 1982-12-10 | Neste Oy | Foerfarande foer framstaellning av ett alkaliloesligt cellulosaderivat |
AT384813B (de) * | 1984-10-09 | 1988-01-11 | Chemiefaser Lenzing Ag | Verfahren zur herstellung von cellulosecarbamaten |
FI81842C (fi) * | 1986-12-31 | 1990-12-10 | Neste Oy | Icke-vaevd fiberprodukt. |
CN1230579C (zh) * | 1996-08-23 | 2005-12-07 | 韦尔豪泽公司 | 形成里奥赛尔纤维的方法 |
DE19721609A1 (de) * | 1997-05-23 | 1998-11-26 | Zimmer Ag | Verfahren und Vorrichtung zum Verspinnen von Cellulosecarbamat-Lösungen |
AT406386B (de) * | 1998-07-28 | 2000-04-25 | Chemiefaser Lenzing Ag | Verfahren und vorrichtung zur herstellung cellulosischer formkörper |
DE10037983B4 (de) * | 2000-08-03 | 2006-04-13 | Stefan Zikeli | Polymerzusammensetzung und daraus hergestellter Formkörper mit einem Gehalt an Alkaloid |
DE102004007617B4 (de) | 2004-02-17 | 2007-02-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Herstellung eines Vliesstoffes, Vliesstoff und dessen Verwendung |
-
2005
- 2005-06-27 DE DE102005029793A patent/DE102005029793B4/de not_active Expired - Fee Related
-
2006
- 2006-06-27 AT AT06754593T patent/ATE526438T1/de active
- 2006-06-27 US US11/993,940 patent/US20080287025A1/en not_active Abandoned
- 2006-06-27 WO PCT/EP2006/006204 patent/WO2007000319A1/de active Application Filing
- 2006-06-27 JP JP2008518702A patent/JP2008546928A/ja active Pending
- 2006-06-27 EP EP20060754593 patent/EP1896635B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2007000319A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007000319A1 (de) | 2007-01-04 |
DE102005029793B4 (de) | 2007-04-26 |
JP2008546928A (ja) | 2008-12-25 |
US20080287025A1 (en) | 2008-11-20 |
DE102005029793A1 (de) | 2006-12-28 |
EP1896635B1 (de) | 2011-09-28 |
ATE526438T1 (de) | 2011-10-15 |
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