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1. WO2022023394 - USE OF LYOCELL FIBRES

Publication Number WO/2022/023394
Publication Date 03.02.2022
International Application No. PCT/EP2021/071091
International Filing Date 28.07.2021
IPC
D21H 13/08 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
13Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
02Synthetic cellulose fibres
08from regenerated cellulose
D21H 13/10 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
13Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
10Organic non-cellulose fibres
D21H 13/36 2006.1
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D84; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G97; PAPER NOT OTHERWISE PROVIDED FOR
13Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
36Inorganic fibres or flakes
D04H 1/28 2012.1
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING 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
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
04from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated man-made fibres
28Regenerated cellulose series
D04H 1/4258 2012.1
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING 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
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
42characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
425Cellulose series
4258Regenerated cellulose series
D04H 1/4391 2012.1
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING 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
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
42characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
4391characterised by the shape of the fibres
CPC
D04H 1/28
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
04from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
28Regenerated cellulose series
D04H 1/4258
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
42characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
425Cellulose series
4258Regenerated cellulose series
D04H 1/43912
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
42characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
4391characterised by the shape of the fibres
43912fibres with noncircular cross-sections
D04H 1/498
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
40from fleeces or layers composed of fibres without existing or potential cohesive properties
44the fleeces or layers being consolidated by mechanical means, e.g. by rolling
46by needling or like operations to cause entanglement of fibres
498entanglement of layered webs
D04H 1/732
DTEXTILES; PAPER
04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
1Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
70characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
72the fibres being randomly arranged
732by fluid current, e.g. air-lay
D21H 13/08
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
13Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
02Synthetic cellulose fibres
08from regenerated cellulose
Applicants
  • LENZING AKTIENGESELLSCHAFT [AT]/[AT]
Inventors
  • BERGFELD, Michael
  • SLATER, Peter Andrew
  • WOODROW, Oliver
Agents
  • SCHWARZ & PARTNER PATENTANWÄLTE OG
  • NEMEC, Harald
Priority Data
20188361.829.07.2020EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) USE OF LYOCELL FIBRES
(FR) UTILISATION DE FIBRES DE LYOCELL
Abstract
(EN) The invention relates to the use of a lyocell fibre (1) for the manufacture of a nonwoven fibre fleece (10, 100). To manufacture a thin nonwoven fibre fleece with sufficient mechanical properties, the use of a lyocell fibre is proposed, where the fibre (1) has a cross-sectional aspect ratio of at least 1.8. The invention further relates to a nonwoven fibre fleece (10, 100). In order to manufacture a thin nonwoven fibre fleece (10, 100) suitable for use as a battery seperator, it is proposed, that the fibre fleece comprises at least two layers (11, 12) of fibrillated lyocell fibres (13), with the fibrillated lyocell fibres (13) having solid cores (14, 110) and fibrils (15) protruding from said cores (14), the fibres and fibrils (15) being intermingled to form the fibre fleece (10), embedding the solid cores (14) therein, whereby the solid cores (14, 110) of the fibrillated lyocell fibres (13) have an average cross-sectional aspect ratio k of at least 1.5.
(FR) L'invention se rapporte à l'utilisation d'une fibre Lyocell (1) permettant la fabrication d'un molleton de fibres non tissées (10, 100). Pour fabriquer un molleton fin de fibres non tissées présentant des propriétés mécaniques suffisantes, l'utilisation d'une fibre Lyocell est proposée, la fibre (1) ayant un rapport d'aspect de section transversale d'au moins 1,8. La présente invention se rapporte en outre à un molleton de fibres non tissées (10, 100). Afin de fabriquer un molleton fin de fibres non tissées (10, 100) approprié pour être utilisé comme séparateur de batterie, l'invention propose un molleton de fibres comprend au moins deux couches (11, 12) de fibres Lyocell fibrillées (13), les fibres Lyocell fibrillées (13) ayant des noyaux solides (14, 110) et des fibrilles (15) faisant saillie desdits noyaux (14), les fibres et les fibrilles (15) étant entremêlées pour former le molleton de fibres (10) et incorporant les noyaux solides (14) à l'intérieur de ces dernières, les noyaux solides (14, 110) des fibres Lyocell fibrillées (13) ayant un rapport d'aspect de section transversale k d'au moins 1,5.
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