EP0929708A1 - Verfahren zur herstellung eines spinnvlieses aus thermobondierten, gekräuselten bikomponentenfasern - Google Patents

Verfahren zur herstellung eines spinnvlieses aus thermobondierten, gekräuselten bikomponentenfasern

Info

Publication number
EP0929708A1
EP0929708A1 EP98947325A EP98947325A EP0929708A1 EP 0929708 A1 EP0929708 A1 EP 0929708A1 EP 98947325 A EP98947325 A EP 98947325A EP 98947325 A EP98947325 A EP 98947325A EP 0929708 A1 EP0929708 A1 EP 0929708A1
Authority
EP
European Patent Office
Prior art keywords
fibers
bicomponent fibers
thermobonded
bicomponent
spun
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
Application number
EP98947325A
Other languages
English (en)
French (fr)
Other versions
EP0929708B1 (de
Inventor
Axel Nickel
Stefan Etzold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corovin GmbH
Original Assignee
Corovin GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
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Application filed by Corovin GmbH filed Critical Corovin GmbH
Publication of EP0929708A1 publication Critical patent/EP0929708A1/de
Application granted granted Critical
Publication of EP0929708B1 publication Critical patent/EP0929708B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • 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
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • 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
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • 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
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin 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
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • 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
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43825—Composite fibres
    • D04H1/43828—Composite fibres sheath-core
    • 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
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43825—Composite fibres
    • D04H1/43832—Composite fibres side-by-side
    • 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
    • D04H1/4391—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 characterised by the shape of the fibres
    • D04H1/43914—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 characterised by the shape of the fibres hollow 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
    • D04H1/4391—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 characterised by the shape of the fibres
    • D04H1/43918—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 characterised by the shape of the fibres nonlinear fibres, e.g. crimped or coiled 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5414—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres side-by-side
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/544—Olefin 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
    • D04H13/00—Other non-woven fabrics
    • 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
    • D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
    • 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
    • D04H3/033—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 reorientation immediately after yarn or filament formation
    • 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
    • D04H3/07—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 otherwise than in a plane, e.g. in a tubular way
    • D04H3/073—Hollow cylinder shaped
    • 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
    • D04H3/14—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 yarns or filaments produced by welding
    • D04H3/147—Composite 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
    • D04H3/08—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
    • 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
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • 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]
    • Y10T442/659—Including an additional nonwoven fabric
    • 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]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/66—Additional nonwoven fabric is a spun-bonded fabric

Definitions

  • the invention relates to a method for producing a spunbonded fabric from thermobonded crimped bicomponent fibers, the bicomponent fibers each consisting of two plastic materials with different properties.
  • the object of the invention is to provide a method of the type mentioned at the outset, by means of which spunbonded nonwovens can be created from thermobonded, crimped bicomponent fibers which are voluminous and by which the properties of the nonwoven with regard to strength, porosity, crimping of the individual fiber and final weight are influenced in a targeted manner can. If necessary, the watertightness of the nonwovens created by the process should also be able to be influenced by the process.
  • the bicomponent fibers each consisting of two plastic materials with different properties
  • the fibers spun from the two plastic materials are uncrimped and drawn off in a first step, in a second step on one
  • the sieve belt is deposited and thermobonded and in a third step the bicomponent phase of the nonwoven obtained is passed through Longitudinal and / or transverse stretching and thermal treatment curled.
  • the properties of the nonwoven can be influenced in a very targeted manner if the nonwoven is stretched in the longitudinal and transverse directions during the thermal treatment.
  • the actual crimping of the bicomponent fibers arises in the method according to the invention in the relaxation following the longitudinal and / or transverse stretching, which can also be referred to as relaxing.
  • the crimping rate can be increased by the combined thermal and mechanical influencing of the fibers in the nonwoven dressing, as a result of which the nonwoven obtained in this way becomes more voluminous than nonwovens obtained with previously known methods.
  • part of the crimp, and therefore part of the volume is lost during the thermal bonding and other thermal treatments.
  • a larger volume is particularly advantageous when the fleece resulting from the process according to the invention is used as an acquisition layer in diapers or sanitary napkins.
  • this is carried out using bicomponent fibers of the side-by-side type.
  • the method is carried out with bicomponent fibers with an eccentric core.
  • the use of bicomponent fibers of the side-by-side type and of the type with an eccentric core as a solid or hollow fiber means that the product has a soft feel. This soft handle makes it possible to replace all of the nonwovens previously used in the hygiene sector.
  • Another embodiment of the invention provides that the method is carried out with segmented hollow bicomponent fibers, wherein adjacent segments of each fiber consist of different materials. It is provided as a further embodiment that the fibers of the fleece are stretched and thermally treated in such a way that the fibers curl and fibrillate.
  • the stretching, in particular of segmented bicomponent fibers, beyond a certain stretching degree leads to fibrillation, i.e. controlled tearing or fanning out. If the fibers stretched and fibrillated in this way are relaxed again, they are crimped in addition to fibrillation.
  • a fleece obtained in this way has a significantly lower porosity with the same basis weight, which is reflected in a higher water resistance of the fleece. It is provided in an advantageous embodiment of the invention that the fibers are spun from two polypropylene granules, the first polypropylene granules having a viscosity range MFI of 16 to 35 and the second polypropylene granules having a viscosity range MFI which is 8 to 10 points is below the viscosity range MFI of the first polypropylene granulate.
  • the fibers are spun from two different polyolefins or from a polyolefin and from PET.
  • FIG. 1 shows a cross section through a diaper with an acquisition layer produced by the method according to the invention
  • Fig. 4 shows a cross section through a segmented hollow bicomponent fiber.
  • 1 shows an application example in the form of a diaper 10 for the use of a spun-bonded nonwoven 12 that results from the method according to the invention.
  • a hollow fiber 22 of the side-by-side type shown in FIG. 2 is first spun using devices known per se.
  • the hollow fiber 22 of the side-by-side type consists of two cylinder jacket halves 24 and 26 made of plastic materials with different properties.
  • the cylinder jacket half 24 consists of polypropylene of the viscosity range MFI 16 to 35
  • the cylinder jacket half 26 consists of a polypropylene, the viscosity range MFI of which is 8 to 10 points below the viscosity range MFI of the polypropylene of the cylinder jacket half 24.
  • a large number of hollow fibers 22 obtained in this way are now drawn off in such a way that no crimp occurs during the drawing.
  • the hollow fibers 22 are then deposited on a wire belt using devices known per se and thermobonded.
  • the spunbond nonwoven 12 formed after the thermal bonding is stretched both in the machine and in the transverse direction in a device known from film production. During this stretching process and the subsequent relaxation, the individual hollow fibers 22 undergo crimping and thus bulging of the nonwoven 12 due to different stretching properties of the cylinder jacket halves 24 and 26.
  • a thermal treatment taking place at the same time is of particular importance.
  • the fleece 12 obtained in this way can now be used in the diaper 10, via a core 14, as an acquisition layer 16.
  • This acquisition layer 16 serves to enable a spatial separation between the core 14 which absorbs the body fluid and the cover stock 20 which is in contact with the organism. That is to say, the acquisition layer 16 serves to prevent liquid that has accumulated in the core 14 from coming into contact again with the body surface of an organism to be treated, since the coverstock 20 generally has to be kept so porous that it is not possible to to interpret it as a semi-permeable structure. Leakage of liquid stored in the core 14 is finally prevented by a film 18 which is connected to the cover stock 20.
  • a spunbonded fabric produced by the method according to the invention can be used as the material of the coverstock 20, and bicomponent fibers 28 with a jacket 30 and an eccentric core 32 shown in FIG. 3 are used for the production thereof.
  • a spunbonded fabric produced with such fibers 28 is suitable for use as a coverstock 20 since it then has a very soft feel and is kind to the skin.
  • Fibers 34 shown in FIG. 4 are used to produce this nonwoven.
  • the cross section of this shown in Fig. 4 Fiber 34 consists of individual segments 36 and 38, with adjacent segments 36, 38 consisting of different raw materials, for example polypropylene with different viscosity ranges MFI, polyolefins such as PP and PE in the different phases, or a combination of PET with a polyolefin. Fibrillation occurs when the fiber 34 is stretched, that is to say the fiber 34 is spliced along the abutting surfaces of the segments 36, 38.
  • This fibrillation of the fiber 34 results in a significantly lower porosity with the same basis weight of the nonwoven, which is reflected in the fact that the nonwoven is more waterproof. This makes it possible that a fleece produced in this way can also be used as a covering material for the diaper 10 or for a similar hygiene product.

Description

Verfahren zur Herstellung eines Spinnvlieses aus thermobondierten gekräuselten Bikomponentenfasem
Die Erfindung betrifft ein Verfahren zur Herstellung eines Spinnvlieses aus thermobondierten gekräuselten Bikompontenen- fasern, wobei die Bikompontenenfasern jeweils aus zwei plastischen Materialien mit unterschiedlichen Eigenschaften bestehen.
Aus der EP 0 391 260 AI ist ein derartiges Verfahren bekannt, bei dem sich auf einem Siebband abgelegte Kompositfasern durch Wärmeeinwirkung, nämlich durch temperierte Luft, kräuseln und miteinander verkleben . Bei diesem Verfahren wird kurz vor der Zufuhr heißer Luft- kalte Luft von unten durch das Siebband geblasen, wodurch sich das Vlies aufplustert. Ein derartiges Vlies hat eine Dicke bis etwa 2,3 mm. Nach einem derartigen Verfahren hergestellte Vliese können in Hygieneprodukten , wie Windeln oder Damenbinden, als Acquisition- layer verwendet werden. Für einige Anwendungsbereiche besitzen derartige Vliese aber eine zu geringe Dicke bzw. weisen einen zu harten Griff auf und sind auch nicht voluminös genug. Ein ähnliches Verfahren ist auch aus der US 5 382 400 bekannt .
Diesen und anderen Verfahren ist gemeinsam, daß die Kräuselung der Filamente einzig und allein durch thermische Behand- lung erreicht wird, wobei während der thermischen Behandlung der Filamente auch die Thermobondierung erfolgt, d. h., das Verkleben der einzelnen Fasern an ihren Bondingpunkten. Diese so gewonnenen Vliese genügen nicht allen Anforderungen, insbesondere bei der Verwendung dieser Vliese für Hygieneprodukte, insbesondere sind sie oftmals nicht voluminös genug.
Aufgabe der Erfindung ist es, ein Verfahren der eingangs genannten Art bereitzustellen, durch das Spinnvliese aus thermobondierten gekräuselten Bikomponentenfasem geschaffen werden können, die voluminös sind und durch welches gezielt Einfluß auf die Eigenschaften des Vlieses bezüglich Festigkeit, Porosität, Kräuselung der Einzelfaser und Endgewicht genommen werden kann. Im Bedarfsfall soll auch die Wasserdichtigkeit der nach dem Verfahren geschaffenen Vliese durch das Verfahren beeinflußbar sein.
Diese Aufgabe wird durch ein Verfahren gelöst, welches die Merkmale des Patentanspruchs 1 aufweist.
Bei dem erfindungsgemäßen Verfahren zur Herstellung eines Spinnylieses aus thermobondierten gekräuselten Bikomponentenfasem, wobei die Bikomponentenfasem jeweils aus zwei plastischen Materialien mit unterschiedlichen Eigenschaften bestehen, werden in einem ersten Schritt die aus den zwei plastischen Materialien ersponnenen Fasern ungekräuselt abgezogen und verstreckt, in einem zweiten Schritt auf einem Siebband abgelegt und thermobondiert und in einem dritten Schritt werden die Bikomponentenfase des gewonnenen Vlieses durch Längs- und/oder Querstreckung und thermische Behandlung gekräuselt .
Es hat sich nämlich überraschend gezeigt, daß sich sehr gezielt Einfluß auf die Eigenschaften des Vlieses nehmen läßt, wenn während der thermischen Behandlung das Vlies in Längsund Querrichtung gestreckt wird. Die eigentliche Kräuselung der Bikomponentenfasem entsteht bei dem erfindungsgemäßen Verfahren beim der Längs- und/oder Querstreckung folgenden Entspannen, welches auch als Relaxieren bezeichnet werden kann. Die Kräuselungsrate kann durch das kombinierte thermische und mechanische Beeinflussen der Fasern im Vliesverband erhöht werden, wodurch das derart gewonnene Vlies voluminöser wird als mit bisher bekannten Verfahren gewonnene Vliese. Bei durch übliche Verfahren geschaffenen Vliesen geht nämlich ein Teil der Kräuselung, und damit ein Teil des Volumens, während des Thermobondierens und sonstiger thermischer Behandlungen verloren .
Es wurde als vorteilhaft gefunden, die Kräuselung erst nach dem Thermobondieren durch mechanisches Strecken zu erreichen, wodurch das Volumen des so gewonnenen Vlieses größer ist als bei durch bisher übliche Verfahren geschaffenen Vliesen.
Ein größeres Volumen ist insbesondere dann vorteilhaft, wenn das aus dem erfindunsgemäßen Verfahren hervorgegangene Vlies als Acquisitionlayer in Windeln oder Damenbinden verwendet wird . In einer vorteilhaften Ausgestaltung des Verfahrens wird dieses mit Bikomponentenfasem des Side-by-Side-Typs durchgeführt. In einer weiteren Ausgestaltung der Erfindung wird das Verfahren mit Bikomponentenfasem mit exzentrischem Kern durchgeführt . Durch die Verwendung von Bikompontenenfasern des Side-by-Side-Typs und des Typs mit exzentrischem Kern als Voll- oder Hohlfaser läßt sich erreichen, daß ein weicher Griff des Produktes entsteht. Durch diesen weichen Griff ist es möglich, alle bisher im Hygienebereich eingesetzten Vliesstoffe zu ersetzen.
Eine andere Ausgestaltung der Erfindung sieht vor, daß das dem Verfahren mit segmentierten Hohl-Bikomponentenfasern durchgeführt wird, wobei benachbarte Segmente jeder Faser aus unterschiedlichen Materialien bestehen. Hierbei ist als weitere Ausgestaltung vorgesehen, daß die Fasern des Vlieses derart verstreckt und thermisch behandelt werden, daß die Fasern sich kräuseln und fibrillieren. Hierbei macht man sich die Erkenntnis zu nutze, daß das Verstrecken insbesondere von segmentierten Bikomponentenfasem über einen bestimmten Ver- streckungsgrad hinaus ein Fibrillieren, d.h. ein kontrolliertes Aufreißen oder Aufspleißen bewirkt. Werden die derart verstreckten und fibrillierten Fasern wieder entspannt, werden sie zusätzlich zur Fibrillierung gekräuselt.
Ein derart gewonnenes Vlies besitzt bei gleichem Flächengewicht eine deutlich geringere Porosität, die sich in einer höheren Wasserdichtigkeit des Vlies niederschlägt. Es ist in einer vorteilhaften Ausgestaltung der Erfindung vorgesehen, daß die Fasern aus zwei Polypropylen-Granulaten ersponnen werden, wobei ein erstes Polypropylen-Granulat einen Viskositätsbereich MFI von 16 bis 35 und das zweite Polypropylen-Granulat einen Viskositätsbereich MFI aufweist, welcher 8 bis 10 Punkte unter dem Viskositätsbereich MFI des ersten Polypropylen-Granulats liegt.
Alternativ ist es vorgesehen, daß die Fasern aus zwei unterschiedlichen Polyolefinen oder aus einem Polyolefin und aus PET ersponnen werden.
Die Erfindung wird anhand der Zeichnung, der Beschreibung und der Patentansprüche näher erläutert. In der Zeichnung zeigen:
Fig. 1 einen Querschnitt durch eine Windel mit einem nach dem erfindungsgemäßen Verfahren hergestellten Acquisitionlayer,
Fig. 2 einen Querschnitt durch eine Bikomponen- tenfaser des Side-by-Side-Typs,
Fig. 3 einen Querschnitt durch eine Bikomponen- tenfaser mit exzentrischem Kern, und
Fig. 4 einen Querschnitt durch eine segmentierte Hohl-Bikomponentenfaser . In Fig. 1 ist ein Anwendungsbeispiel in Form einer Windel 10 für den Einsatz eines aus dem erfindungsgemäßen Verfahren hervorgegangenen Spinnvlieses 12 dargestellt. Zur Herstellung des Spinnvlieses 12 wird zunächst eine in Fig. 2 dargestellte Hohlfaser 22 des Side-by-Side-Typs mit an sich bekannten Vorrichtungen ersponnen. Die Hohlfaser 22 des Side-by-Side-Typs besteht aus zwei Zylindermantelhälften 24 und 26 aus plastischen Materialien mit unterschiedlichen Eigenschaften. So besteht die Zylindermantelhälfte 24 aus Polypropylen des Viskositätsbereichs MFI 16 bis 35, wohingegen die Zylindermantelhälfte 26 aus einem Polypropylen besteht, dessen Viskositätsbereich MFI um 8 bis 10 Punkte unter dem Viskositätsbereich MFI des Polypropylens der Zylindermantelhälfte 24 liegt.
Eine Vielzahl derartig gewonnener Hohlfasern 22 wird nun derart abgezogen, daß während der Verstreckung noch keine Kräuselung auftritt. Anschließend werden die Hohlfasern 22 mit an sich bekannten Vorrichtungen auf einem Siebband abgelegt und thermobondiert . In einem anschließenden Schritt wird das nach dem Thermobondieren entstandene Spinnvlies 12 in einer aus der Folienherstellung bekannten Vorrichtung sowohl in Maschinen- als auch in Querrichtung gestreckt. Während dieses Streckprozesses und dem anschließendem Entspannen findet in den einzelnen Hohlfasern 22 aufgrund unterschiedlicher Dehnungseigenschaften der Zylindermantelhälften 24 und 26 eine Kräuselung und somit ein Aufbauschen des Vlieses 12 statt. Von besonderer Bedeutung ist hierbei eine gleichzeitig stattfindende thermische Behandlung. Das derart gewonnene Vlies 12 kann nun in der Windel 10, über einen Kern 14 plaziert, als Acquisitionlayer 16 verwendet werden. Dieser Acquisitionlayer 16 dient dazu, eine räumliche Trennung zwischen dem die Körperflüssigkeit aufnehmenden Kern 14 und dem am Organismus anliegenden Coverstock 20 zu ermöglichen. Das heißt, der Acquisitionlayer 16 dient dazu, zu verhindern, daß im Kern 14 angesammelte Flüssigkeit erneut in Kontakt mit der Körperoberfläche eines zu behandelnden Organismus gelangen kann, da der Coverstock 20 in der Regel so porös gehalten werden muß, daß es nicht möglich ist, ihn als semipermeables Gebilde auszulegen. Ein Austreten von im Kern 14 gespeicherter Flüssigkeit wird schließlich durch eine Folie 18, welche mit dem Coverstock 20 verbunden ist, verhindert.
Als Material des Coverstocks 20 kann ein nach dem erfindungsgemäßen Verfahren hergestelltes Spinnvlies verwendet werden, zu dessen Herstellung in Fig. 3 dargestellte Bikomponentenfasem 28 mit einem Mantel 30 und einem exzentrischen Kern 32 verwendet werden. Ein mit derartigen Fasern 28 hergestelltes Spinnvlies eignet sich zur Verwendung als Coverstock 20, da es dann einen sehr weichen Griff aufweist und hautfreundlich ist.
Soll aus dem erfindungsgemäßen Verfahren ein Spinnvlies hervorgehen, das eine gute Wasserdichtigkeit aufweist, werden zur Herstellung dieses Vlieses in Fig. 4 dargestellte Fasern 34 verwendet. Der Querschnitt dieser in Fig. 4 dargestellten Faser 34 besteht aus einzelnen Segmenten 36 und 38, wobei benachbarte Segmente 36, 38 aus unterschiedlichen Rohstoffen bestehen, beispielsweise aus Polypropylen mit unterschiedlichen Viskositätsbereichen MFI, aus Polyolefinen wie PP und PE in den verschiedenen Phasen oder aus einer Kombination von PET mit einem Polyolefin. Beim Strecken der Faser 34 kommt es zu einem Fibrillieren, d. h., die Faser 34 spleisst sich entlang der Stoßflächen der Segmente 36, 38 auf. Durch dieses Fibrillieren der Faser 34 wird eine deutlich geringere Porosität bei gleichem Flächengewicht des Vlieses erreicht, welches sich in einer höheren Wasserdichtigkeit des Vlieses niederschlägt. Hierdurch wird es möglich, daß ein derart hergestelltes Vlies auch als Abdeckmaterial für die Windel 10 oder für ein ähnliches Hygieneprodukt verwendet werden kann.

Claims

P a t e n t a n s p r ü c h e
1. Verfahren zur Herstellung eines Spinnvlieses aus thermobondierten gekräuselten Bikomponentenfasem, wobei die Bikomponentenfasem jeweils aus zwei plastischen Materialien mit unterschiedlichen Eigenschaften bestehen, bei dem
- in einem ersten Schritt die aus den zwei plastischen Materialien ersponnenen Fasern (22; 28; 34) ungekräuselt abgezogen und verstreckt werden,
- in einem zweiten Schritt die Fasern (22; 28; 34) auf einem Siebband abgelegt und thermobondiert werden,
- in einem dritten Schritt die Bikomponentenfase des gewonnenen Vlieses durch Längs- und/oder Querstreckung und thermische Behandlung gekräuselt werden.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet , daß das Verfahren mit Bikomponentenfasem (22) des Side-by-Side- Typs durchgeführt wird.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet , daß das Verfahren mit Bikomponentenfasem (28) mit exzentrischem Kern (32) durchgeführt wird.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet , daß das Verfahren mit segmentierten Hohl-Bikomponentenfasern (34) durchgeführt wird, wobei benachbarte Segmente (36, 38) jeder Faser (34) aus unterschiedlichen Materialien bestehen.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Fasern (34) des Vlieses durch Längs- und/oder Querstrek- kung und thermische Behandlung gekräuselt und fibrilliert werden .
6. Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß die Fasern (22; 28; 34) aus zwei Polypropylen-Granulaten ersponnen werden, wobei ein erstes Polypropylen-Granulat einen Viskositätsbereich MFI von 16 bis 35 und das zweite Propylen-Granulat einen Viskositätsbereich MFI aufweist, welcher 8 bis 10 Punkte unter dem Viskositätsbereich MFI des ersten Polypropylen-Granulats liegt.
7. Verfahren nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß die Fasern (22; 28; 34) aus zwei unterschiedlichen Polyolefinen ersponnen werden.
8. Verfahren nach einem der Ansprüche 1 - 5 , dadurch gekennzeichnet, daß die Fasern (22; 28; 34) aus einem Polyolefin und aus PET ersponnen werden.
EP98947325A 1997-08-01 1998-07-21 Verfahren zur herstellung eines spinnvlieses aus thermobondierten, gekräuselten bikomponentenfasern Expired - Lifetime EP0929708B1 (de)

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PCT/DE1998/002083 WO1999006621A1 (de) 1997-08-01 1998-07-21 Verfahren zur herstellung eines spinnvlieses aus thermobondierten gekräuselten bikomponentenfasern

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US6312545B1 (en) 2001-11-06
WO1999006621A1 (de) 1999-02-11
ES2177055T3 (es) 2002-12-01
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