WO1997014829A1 - Verfahren zur herstellung cellulosischer fasern - Google Patents
Verfahren zur herstellung cellulosischer fasern Download PDFInfo
- Publication number
- WO1997014829A1 WO1997014829A1 PCT/AT1996/000188 AT9600188W WO9714829A1 WO 1997014829 A1 WO1997014829 A1 WO 1997014829A1 AT 9600188 W AT9600188 W AT 9600188W WO 9714829 A1 WO9714829 A1 WO 9714829A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filaments
- squeezing
- cellulosic fibers
- fibers
- cellulosic
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229920003043 Cellulose fiber Polymers 0.000 title abstract description 5
- 239000000835 fiber Substances 0.000 claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229920002678 cellulose Polymers 0.000 claims abstract description 12
- 239000001913 cellulose Substances 0.000 claims abstract description 12
- 238000009987 spinning Methods 0.000 claims abstract description 9
- 150000003512 tertiary amines Chemical class 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 10
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims description 2
- 239000004745 nonwoven fabric Substances 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 abstract description 3
- 150000001412 amines Chemical class 0.000 description 12
- 229920000433 Lyocell Polymers 0.000 description 8
- 238000009960 carding Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 238000002788 crimping Methods 0.000 description 4
- LFTLOKWAGJYHHR-UHFFFAOYSA-N N-methylmorpholine N-oxide Chemical compound CN1(=O)CCOCC1 LFTLOKWAGJYHHR-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000875 Dissolving pulp Polymers 0.000 description 1
- 241000404360 Textilia Species 0.000 description 1
- 238000001212 derivatisation Methods 0.000 description 1
- 238000000578 dry spinning Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
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
-
- 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
- D01D5/26—Formation of staple fibres
-
- 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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
-
- 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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
- D04H1/4258—Regenerated cellulose series
-
- 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
- D04H3/16—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 thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
Definitions
- the invention relates to a process for the production of cellulosic fibers by the amine oxide process, and to cellulosic fibers, in particular cellulosic staple fibers.
- NMMO N-Methylmorpholine-N-oxide
- Other amine oxides are e.g. in EP-A - 0 553 070.
- a method of making moldable cellulose solutions is e.g. known from EP-A-0 356 419.
- the production of cellulosic moldings using tertiary amine oxides is generally referred to as the amine oxide process.
- US Pat. No. 4,246,221 describes an amine oxide process for the production of cellulose solutions which are spun into filaments in a mold, for example a spinneret, and then passed through a precipitation bath in which the cellulose is precipitated and water-containing, swollen Filaments can be obtained. These filaments can be processed in a conventional manner, that is to say by washing and post-treatment, to give cellulosic fibers and staple fibers.
- the cellulosic fiber the production of which is not specified, has a permanent crimp, but it is not explained in detail what is to be understood by this and how the crimp can be imparted to the fiber.
- Fibers that have a crimp are advantageous for processing fibers, in particular staple fibers, for various reasons. For example, carding of the fibers is more successful, since this requires a certain degree of adhesion of the fibers to one another so that a card sliver can be produced at all.
- a crimped fiber has a higher tape adhesion than an uncrimped fiber, which can increase the carding speed.
- a method is known from WO 94/28220 and WO 94/27903 with which lyocell fibers can be given a crimp in a mechanical manner.
- the freshly produced filaments are first passed through a series of washing baths in order to remove the solvent.
- the rope is then dried at about 165 ° C. and, when dry, is stuffed into a tubular device in which the filament rope crumples and a kind of crimp is produced in this way.
- the crimped fiber treated with hot, dry steam and then cut into staple fibers.
- the object of the invention is to provide a method for producing a new lyocell fiber which can be processed into yarns and fabrics more easily than the conventional lyocell fiber.
- the new fiber should not be produced by mechanical crimping according to WO 94/28220 or WO 94/27903.
- the fiber should also not be produced with spinnerets whose spinning holes have a non-round cross-sectional shape. Rather, the lyocell fiber produced according to the invention is to be produced using conventional spinnerets, the spinning holes of which have a round cross section.
- the method according to the invention for producing one of the cellulosic fibers has the following steps:
- Fibers the squeezing being carried out with a force sufficient to ensure that the pinch points produced on the filament are also retained on the dried fiber and are visible as color changes when viewed under linearly polarized light.
- pinch points is also to be understood to mean kinks, twists and other changes in the cross-sectional shape of the filaments and fibers.
- the invention is based on the knowledge that a filament produced by the amine oxide process in the swollen state can be changed in its cross-sectional shape by squeezing, and that this squeezing is retained after drying if it is squeezed with a sufficiently large force.
- cellulosic fibers can be produced whose cross-sectional shape at the pinch points is not circular but, for example, oval.
- the pinch points can also be seen under the microscope as indentations, widenings or kinks.
- the magnitude of the force to be used in squeezing naturally depends on several factors, such as the fiber titer, the degree of swelling and the extent of the desired cross-sectional changes.
- the inventors of the present invention have found that the force required to achieve the desired cross-sectional change can be determined in a simple manner by preliminary tests.
- the fiber can be squeezed by passing the swollen filaments through a suitable shaping tool, for example a plate press, the surface of the plate press being structured by means of elevations and depressions in order to hold the swollen filaments in Expose it to a different pressure in the longitudinal direction and in this way deform the filaments to different degrees.
- a suitable shaping tool for example a plate press
- the surface of the plate press being structured by means of elevations and depressions in order to hold the swollen filaments in Expose it to a different pressure in the longitudinal direction and in this way deform the filaments to different degrees.
- the swollen filaments can also be squeezed by passing the filaments over a roller and exerting the force to squeeze the filaments with a counter-roller, the surface of which is structured accordingly.
- the squeezing is preferably carried out so that there are at least three, in particular at least six, squeezing points per millimeter of filament length.
- the fibers produced according to the invention can be carded more easily since the pinch points apparently give the fibers a certain amount of adhesion to one another, so that a card sliver can be produced more easily.
- the fibers produced according to the invention have a higher tape adhesion than a conventional lyocell fiber with a continuously round cross section. This enables the carding speed to be increased.
- a preferred embodiment of the method according to the invention is characterized in that the water-containing, swollen filaments obtained in step (B) above are cut before pressing.
- a further preferred embodiment of the method according to the invention is characterized in that a fleece is formed from the cut, water-containing, swollen filaments before being squeezed, in which the cut filaments are statistically oriented, and that the fleece is pressed. It has been shown that in this case the pressing surface does not need to be structured, since the differently high pressure required to impress an irregular surface is caused by the fact that the fibers lie one above the other due to their statistical orientation, which means that at the pressing, where the fibers lie on top of each other, naturally a higher pressure is exerted than in other places. This leads to a different cross-sectional deformation.
- the pressing can be carried out as part of the usual pressing of washing water from a staple fiber fleece known from the viscose method.
- This dewatering is usually carried out with one or more pairs of rollers through which the staple fiber fleece is guided on a screen belt. It is crucial, however, that the roller pair (s) exert a sufficiently high pressure on the fleece that not only reduces the water content, but also changes the cross-sectional shape of the cut, swollen filaments sufficiently.
- the invention also relates to a cellulosic fiber, in particular a cellulosic staple fiber, which can be produced by the method according to the invention.
- the fiber according to the invention is characterized in that the change in cross-section of the fiber is retained, i.e. does not disappear after carding or after yarn production. This facilitates the further processing of the Lyocell fiber according to the invention.
- the invention further includes yarns, fabrics, non-wovens, knitted fabrics and knitted fabrics which are characterized in that they contain the fibers according to the invention.
- a spinnable solution of cellulose in water-containing NMMO was first produced, the method described in EP-A - 0 356 419 being used.
- This spinnable solution was spun into filaments in accordance with the process described in WO 93/19230, using a nozzle with circular spinning holes. After being drawn, the filaments were passed into an air gap in an aqueous precipitation bath in which the cellulose coagulated. The water-containing filaments obtained, which were in the swollen state and were hydroplastic, were cut into stack lengths of 4 cm.
- the cut filaments were slurried in water in a mixer, and the cut filaments whirled in the water were applied to a screen belt on which a fleece of cut fibers formed, the fibers being oriented in all directions.
- the screen belt was passed through a pair of rollers, with a pressure of about 10 Pa being applied to the nonwoven for a time of about 0.1 seconds.
- the fleece was then washed and passed through a further pair of rollers, with which a pressure of about 10 was again exerted on the fleece.
- the staple fibers obtained were then dried.
- An examination of the fibers according to the invention under a polarizing microscope (magnification: 400 times) showed that there were an average of 7 pinch points per millimeter of fiber length, at which a change in color of the polarized light was recognizable. At the pinch points, the fibers had a cross-section that was not circular but more or less irregularly deformed. The change in color of the transmitted light is due to the different thickness of the fibers at the respective pinch points.
- Yarns were produced from the fibers obtained and the adhesive lengths of the tapes were measured in accordance with DIN 53834, Part 1.
- the fibers produced according to the invention showed a greater adhesive length than fibers with a substantially circular cross section that were not produced according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Artificial Filaments (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Nonwoven Fabrics (AREA)
- Woven Fabrics (AREA)
- Treatment Of Fiber Materials (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
Claims
Priority Applications (21)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19680883T DE19680883D2 (de) | 1995-10-13 | 1996-10-08 | Verfahren zur Herstellung cellulosischer Fasern |
JP51533897A JP3884479B2 (ja) | 1995-10-13 | 1996-10-08 | セルロースファイバの製造方法 |
MXPA/A/1997/004441A MXPA97004441A (en) | 1995-10-13 | 1996-10-08 | Procedure for the production of decelul fibers |
SI9630026T SI0797696T1 (en) | 1995-10-13 | 1996-10-08 | Process for producing cellulose fibres |
CA002206250A CA2206250C (en) | 1995-10-13 | 1996-10-08 | Process for producing cellulose fibres |
DK96932374T DK0797696T3 (da) | 1995-10-13 | 1996-10-08 | Fremgangsmåde til fremstilling af cellulosefibre |
US08/849,464 US6117378A (en) | 1995-10-13 | 1996-10-08 | Process for producing cellulose fibres |
AU71205/96A AU705530B2 (en) | 1995-10-13 | 1996-10-08 | Process for the production of cellulose fibres |
RO97-01053A RO116653B1 (ro) | 1995-10-13 | 1996-10-08 | Procedeu de fabricare a fibrelor celulozice si fibra celulozica obtinuta prin acest procedeu |
SK724-97A SK284228B6 (sk) | 1995-10-13 | 1996-10-08 | Spôsob výroby celulózových vlákien |
EP96932374A EP0797696B2 (de) | 1995-10-13 | 1996-10-08 | Verfahren zur herstellung cellulosischer fasern |
DE59600380T DE59600380D1 (de) | 1995-10-13 | 1996-10-08 | Verfahren zur herstellung cellulosischer fasern |
AT96932374T ATE169063T1 (de) | 1995-10-13 | 1996-10-08 | Verfahren zur herstellung cellulosischer fasern |
PL96320740A PL188136B1 (pl) | 1995-10-13 | 1996-10-08 | Sposób wytwarzania włókien celulozowych oraz włókno celulozowe, cięte włókno celulozowe, przędza, tkanina, włókniny, dzianiny szydełkowe i dzianiny, otrzymane tym sposobem |
HU9800831A HU221512B (en) | 1995-10-13 | 1996-10-08 | Process for producing cellulose fibres, cellulose fibres and products containing them |
GB9712422A GB2310630B (en) | 1995-10-13 | 1996-10-08 | Process for the production of cellulose fibres |
BR9606687A BR9606687A (pt) | 1995-10-13 | 1996-10-08 | Processo para a produção de fibras de celulose |
NO972440A NO309490B1 (no) | 1995-10-13 | 1997-05-28 | Framgangsmåte for framstilling av celluloseholdige fibre og anvendelse av de framstilte fibre |
BG101688A BG63643B1 (bg) | 1995-10-13 | 1997-06-26 | Метод за получаване на целулозни влакна |
GR980401783T GR3027605T3 (en) | 1995-10-13 | 1998-08-07 | Process for producing cellulose fibres |
HK98109930A HK1009161A1 (en) | 1995-10-13 | 1998-08-13 | Process for preparing cellulose fibers, cellulose fibers and products |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0170395A AT402741B (de) | 1995-10-13 | 1995-10-13 | Verfahren zur herstellung cellulosischer fasern |
ATA1703/95 | 1995-10-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997014829A1 true WO1997014829A1 (de) | 1997-04-24 |
Family
ID=3519158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1996/000188 WO1997014829A1 (de) | 1995-10-13 | 1996-10-08 | Verfahren zur herstellung cellulosischer fasern |
Country Status (28)
Country | Link |
---|---|
US (1) | US6117378A (de) |
EP (1) | EP0797696B2 (de) |
JP (4) | JP3884479B2 (de) |
KR (1) | KR100430921B1 (de) |
CN (1) | CN1070543C (de) |
AT (2) | AT402741B (de) |
AU (1) | AU705530B2 (de) |
BG (1) | BG63643B1 (de) |
BR (1) | BR9606687A (de) |
CA (1) | CA2206250C (de) |
CZ (1) | CZ290849B6 (de) |
DE (2) | DE59600380D1 (de) |
DK (1) | DK0797696T3 (de) |
ES (1) | ES2120286T5 (de) |
GB (1) | GB2310630B (de) |
GR (1) | GR3027605T3 (de) |
HK (1) | HK1009161A1 (de) |
HU (1) | HU221512B (de) |
MY (1) | MY113879A (de) |
NO (1) | NO309490B1 (de) |
PL (1) | PL188136B1 (de) |
RO (2) | RO120276B1 (de) |
SI (1) | SI0797696T1 (de) |
SK (1) | SK284228B6 (de) |
TR (1) | TR199700493T1 (de) |
TW (2) | TW357201B (de) |
WO (1) | WO1997014829A1 (de) |
ZA (1) | ZA968515B (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6645409B2 (en) | 1998-09-29 | 2003-11-11 | Lenzing Aktiengesellschaft | Process for the production of cellulosic fibres |
WO2006125484A1 (de) * | 2005-05-24 | 2006-11-30 | Zimmer Aktiengesellschaft | Verfahren und vorrichtung zum schneiden von nmmo-haltigen spinnfäden sowie für zellulose-stapelfasern |
EP3771755A1 (de) | 2019-08-02 | 2021-02-03 | Lenzing Aktiengesellschaft | Verfahren zur herstellung von lyocell-stapelfasern |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT402741B (de) * | 1995-10-13 | 1997-08-25 | Chemiefaser Lenzing Ag | Verfahren zur herstellung cellulosischer fasern |
CN1061106C (zh) * | 1997-12-09 | 2001-01-24 | 宜宾丝丽雅集团有限公司 | 溶剂法纤维素纤维制造方法 |
EP1936017B1 (de) * | 2006-12-22 | 2013-08-21 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Verfahren und Vorrichtung zur Herstellung eines Spinnvlieses aus cellulosischen Filamenten |
KR100865135B1 (ko) | 2007-04-11 | 2008-10-24 | 주식회사 효성 | 의류용 라이오셀 필라멘트의 제조방법 |
AT505511B1 (de) * | 2007-07-11 | 2014-03-15 | Chemiefaser Lenzing Ag | Füllfaser mit verbessertem öffnungsverhalten, verfahren zu deren herstellung und deren verwendung |
AT506268B1 (de) | 2008-01-11 | 2014-08-15 | Chemiefaser Lenzing Ag | Mikrofaser |
KR101455002B1 (ko) | 2013-06-28 | 2014-11-03 | 코오롱인더스트리 주식회사 | 담배필터용 라이오셀 소재 및 그 제조방법 |
TWI667378B (zh) | 2014-01-03 | 2019-08-01 | 奧地利商蘭精股份有限公司 | 纖維素纖維 |
KR102211219B1 (ko) | 2014-06-30 | 2021-02-03 | 코오롱인더스트리 주식회사 | 담배필터용 이형단면 라이오셀 소재 및 그 제조방법 |
KR102211186B1 (ko) | 2014-12-31 | 2021-02-03 | 코오롱인더스트리 주식회사 | 담배필터용 라이오셀 소재 및 그 제조방법 |
DE202015102564U1 (de) | 2015-05-19 | 2015-08-13 | W. Pelz Gmbh & Co. Kg | Oraltabakpackung |
CN105200670B (zh) * | 2015-08-17 | 2017-08-01 | 赖明荣 | 一种耐低温无纺布 |
CN109809953A (zh) * | 2018-12-29 | 2019-05-28 | 湖北航鹏化学动力科技有限责任公司 | 一种带孔型产气剂模压制品及其制备工艺 |
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DE439681C (de) * | 1925-02-19 | 1927-01-15 | Lilly Mueller | Verfahren zum Wellen von glatten Kunstseidefasern |
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US3447956A (en) * | 1966-09-02 | 1969-06-03 | Eastman Kodak Co | Process for strengthening swellable fibrous material with an amine oxide and the resulting material |
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GB9304887D0 (en) * | 1993-03-10 | 1993-04-28 | Courtaulds Plc | Fibre treatment |
AT399729B (de) * | 1993-07-01 | 1995-07-25 | Chemiefaser Lenzing Ag | Verfahren zur herstellung cellulosischer fasern sowie vorrichtung zur durchführung des verfahrens und deren verwendung |
GB9404510D0 (en) * | 1994-03-09 | 1994-04-20 | Courtaulds Fibres Holdings Ltd | Fibre treatment |
GB9404547D0 (en) † | 1994-03-09 | 1994-04-20 | Courtaulds Fibres Holdings Ltd | Fibre production process |
GB9407496D0 (en) * | 1994-04-15 | 1994-06-08 | Courtaulds Fibres Holdings Ltd | Fibre treatment |
GB9412501D0 (en) * | 1994-06-22 | 1994-08-10 | Courtaulds Fibres Holdings Ltd | Manufacture of fibre |
AT401392B (de) * | 1994-09-05 | 1996-08-26 | Chemiefaser Lenzing Ag | Verfahren zur herstellung eines cellulosischen formkörpers |
AT402741B (de) * | 1995-10-13 | 1997-08-25 | Chemiefaser Lenzing Ag | Verfahren zur herstellung cellulosischer fasern |
-
1995
- 1995-10-13 AT AT0170395A patent/AT402741B/de not_active IP Right Cessation
-
1996
- 1996-10-01 TW TW085111971A patent/TW357201B/zh not_active IP Right Cessation
- 1996-10-01 TW TW087103019A patent/TW421677B/zh not_active IP Right Cessation
- 1996-10-04 MY MYPI96004112A patent/MY113879A/en unknown
- 1996-10-08 DK DK96932374T patent/DK0797696T3/da active
- 1996-10-08 RO ROA200100266A patent/RO120276B1/ro unknown
- 1996-10-08 ES ES96932374T patent/ES2120286T5/es not_active Expired - Lifetime
- 1996-10-08 CN CN96191689A patent/CN1070543C/zh not_active Expired - Lifetime
- 1996-10-08 AU AU71205/96A patent/AU705530B2/en not_active Expired
- 1996-10-08 PL PL96320740A patent/PL188136B1/pl not_active IP Right Cessation
- 1996-10-08 CA CA002206250A patent/CA2206250C/en not_active Expired - Lifetime
- 1996-10-08 WO PCT/AT1996/000188 patent/WO1997014829A1/de active IP Right Grant
- 1996-10-08 EP EP96932374A patent/EP0797696B2/de not_active Expired - Lifetime
- 1996-10-08 JP JP51533897A patent/JP3884479B2/ja not_active Expired - Lifetime
- 1996-10-08 RO RO97-01053A patent/RO116653B1/ro unknown
- 1996-10-08 SK SK724-97A patent/SK284228B6/sk unknown
- 1996-10-08 TR TR97/00493T patent/TR199700493T1/xx unknown
- 1996-10-08 AT AT96932374T patent/ATE169063T1/de active
- 1996-10-08 CZ CZ19971614A patent/CZ290849B6/cs not_active IP Right Cessation
- 1996-10-08 DE DE59600380T patent/DE59600380D1/de not_active Expired - Lifetime
- 1996-10-08 US US08/849,464 patent/US6117378A/en not_active Expired - Lifetime
- 1996-10-08 BR BR9606687A patent/BR9606687A/pt not_active IP Right Cessation
- 1996-10-08 DE DE19680883T patent/DE19680883D2/de not_active Ceased
- 1996-10-08 KR KR1019970704062A patent/KR100430921B1/ko not_active IP Right Cessation
- 1996-10-08 GB GB9712422A patent/GB2310630B/en not_active Revoked
- 1996-10-08 SI SI9630026T patent/SI0797696T1/xx unknown
- 1996-10-08 HU HU9800831A patent/HU221512B/hu not_active IP Right Cessation
- 1996-10-09 ZA ZA968515A patent/ZA968515B/xx unknown
-
1997
- 1997-05-28 NO NO972440A patent/NO309490B1/no unknown
- 1997-06-26 BG BG101688A patent/BG63643B1/bg unknown
-
1998
- 1998-08-07 GR GR980401783T patent/GR3027605T3/el unknown
- 1998-08-13 HK HK98109930A patent/HK1009161A1/xx not_active IP Right Cessation
-
2006
- 2006-09-07 JP JP2006242655A patent/JP2007016381A/ja not_active Withdrawn
-
2008
- 2008-09-17 JP JP2008237404A patent/JP2009013577A/ja not_active Withdrawn
-
2010
- 2010-03-29 JP JP2010076444A patent/JP5043144B2/ja not_active Expired - Lifetime
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WO1994027903A1 (en) * | 1993-05-24 | 1994-12-08 | Courtaulds Fibres (Holdings) Limited | Manufacture of crimped solvent-spun cellulose fibre and quality control detection means therefor |
WO1994028220A1 (en) * | 1993-05-24 | 1994-12-08 | Courtaulds Fibres (Holdings) Limited | Manufacture of crimped solvent-spun cellulose fibre |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6645409B2 (en) | 1998-09-29 | 2003-11-11 | Lenzing Aktiengesellschaft | Process for the production of cellulosic fibres |
WO2006125484A1 (de) * | 2005-05-24 | 2006-11-30 | Zimmer Aktiengesellschaft | Verfahren und vorrichtung zum schneiden von nmmo-haltigen spinnfäden sowie für zellulose-stapelfasern |
EP3771755A1 (de) | 2019-08-02 | 2021-02-03 | Lenzing Aktiengesellschaft | Verfahren zur herstellung von lyocell-stapelfasern |
WO2021023594A1 (de) | 2019-08-02 | 2021-02-11 | Lenzing Aktiengesellschaft | Verfahren zur herstellung von lyocell-stapelfasern |
EP4007826B1 (de) | 2019-08-02 | 2023-06-07 | Lenzing Aktiengesellschaft | Verfahren zur herstellung von lyocell-stapelfasern |
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