EP1192306B1 - Verfahren zur herstellung eines vliesstoffes, anlage zur durchführung dieses verfahren, hergestellter vliesstoff - Google Patents

Verfahren zur herstellung eines vliesstoffes, anlage zur durchführung dieses verfahren, hergestellter vliesstoff

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Publication number
EP1192306B1
EP1192306B1 EP00931356A EP00931356A EP1192306B1 EP 1192306 B1 EP1192306 B1 EP 1192306B1 EP 00931356 A EP00931356 A EP 00931356A EP 00931356 A EP00931356 A EP 00931356A EP 1192306 B1 EP1192306 B1 EP 1192306B1
Authority
EP
European Patent Office
Prior art keywords
web
spunbond
fibres
sheet
filaments
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.)
Expired - Lifetime
Application number
EP00931356A
Other languages
English (en)
French (fr)
Other versions
EP1192306A1 (de
Inventor
André Vuillaume
Frédéric NOELLE
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.)
Rieter Perfojet SAS
Original Assignee
Rieter Perfojet SAS
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Filing date
Publication date
Application filed by Rieter Perfojet SAS filed Critical Rieter Perfojet SAS
Publication of EP1192306A1 publication Critical patent/EP1192306A1/de
Application granted granted Critical
Publication of EP1192306B1 publication Critical patent/EP1192306B1/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
    • D04H3/08—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
    • 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
    • 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
    • D04H1/4374—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 using different kinds of webs, e.g. by layering webs
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • 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
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • 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
    • 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
    • D04H3/11—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 by fluid jet
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/08—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of fibres or yarns

Definitions

  • the present invention relates to an improvement made to the technology making it possible to produce such spunbond nonwoven webs and relates more specifically to a method, an installation and a new type of product obtained by the use of these means, a product having the appearance and properties such as touch, mechanical characteristics, flexibility, close to a conventional textile, including fabric.
  • the web is consolidated, for example by performing a calibration or calendering, preferably hot, so that the elementary filaments are bonded to each other.
  • Such treatments are frequently used when it is desired to produce complexes consisting of a superposition of discontinuous fibrous webs optionally comprising an internal reinforcement, such as a fabric, knitted fabric, unidirectional or bidirectional web consisting of one or more sets of yarns. parallel or not.
  • pressing is carried out by compaction of the assembly consisting of the superposition of the layer or layers of discontinuous fibers which cover or imprison between them the "spunbond" tablecloth produced.
  • Such compaction which can be achieved by any suitable means, such as in particular by means of a pressure roller, can in no way be likened to a calendering operation since it is made cold.
  • a single staple fiber veil can be associated with the web to the "spunbond" type web, said staple fiber web being able to be delivered upstream of the "spunbond” formation zone and being brought on the conveyor belt on which are deposited the filaments from the "spunbond” installation, filaments which are therefore distributed on the surface of this web, or, delivered downstream of the continuous filament web formation zone.
  • the spunbond-type sheet is covered on both sides by a veil of staple fibers, produced one upstream of the formation zone of the "spunbond” veil, the other in downstream, the web of continuous filaments being thus trapped sandwiched between the two layers of staple fibers.
  • the complex thus formed of three layers is, after compacting by pressing, transferred, always continuously, on a binding treatment line by means of water jets, jets which act successively against the surfaces of said complexes.
  • a binding treatment line by means of water jets, jets which act successively against the surfaces of said complexes.
  • the invention also relates to an installation for the continuous implementation of the aforementioned method.
  • such an installation comprises, between the water jetting means and the drying means, a set of textile producing jets reorienting the fibers.
  • the article obtained is characterized in that the continuous filaments which compose it are associated with discontinuous fibers, fibers which cover the web based on continuous filaments and penetrate inside this layer. last by binding around said filaments.
  • Such a product retains all the mechanical strength characteristics of conventional spunbond webs whose cohesion is given by a calendering treatment, the product obtained also having the appearance and properties such as touch, flexibility comparable to a conventional textile.
  • the staple fibers which are associated with the spunbond web can be of any type, natural or chemical, hydrophobic or hydrophilic, and this, depending on the applications for which the product is intended, the length of said fibers being between 5 mm and 60 mm and their titre between 0.8 dtex and 6.6 dtex.
  • basis weight of the staple fiber fleece (s) which are associated with the spunbond web may vary according to the applications, but will advantageously be between 10 g / m 2 and 50 g / m 2, a tablecloth having a lower grammage at 10 g / m2 not allowing to obtain a proper binding of the spunbond web, while a web greater than 50 g / m2 reduces the economic interest of the process.
  • the invention therefore relates to a method and an installation which makes it possible to continuously produce a new type of "spunbond" plies consisting of continuous synthetic filaments, plies which not only retain the properties of mechanical strength ( elongation, tensile strength, tearing resistance ...), equivalent to conventional "hot” calendered “spunbond” plies, which, moreover, have the appearance, feel and flexibility of a conventional textile such as than a fabric.
  • a spunbond-type nonwoven web is produced according to the conventional technique of extruding a molten organic polymer through a die (2). piercing holes so as to form a bundle or curtain of filaments (3).
  • the extruded filaments (3) After cooling, to obtain the at least superficial solidification of the extruded filaments (3), they are oriented and stretched by means of one or more devices (4) with fluid jets at the exit of which they are distributed on a receiving surface in the form of a web (S).
  • the "spunbond" web (S) is not received directly on the surface of a conveyor belt (5) subjected to a suction source, but on a web (V1) of fibers discontinuous - natural and / or artificial and / or synthetic - produced immediately upstream of the spunbond plant (1).
  • This web (V1) is for example made by means of a conventional assembly (6) consisting of a card associated possibly with a spreader spreader assembly, the web (V1) produced being delivered to the conveyor belt (5).
  • the two textile layers (V1) and (S) superimposed then pass, still being maintained on the conveyor belt (5), on a first assembly (8), consisting for example of two cylinders to ensure compaction.
  • a second assembly (9), such as a card or other equivalent installation is delivered to the surface of the spunbond web (S), a second web (V2) of staple fibers, the three textile layers superposed elementary elements (V1, S and V2) being compacted again by pressing between two cylinders (8).
  • the compacted assembly is then brought to a treatment line, illustrated in more detail in FIG. 2, designated by the general reference (10) making it possible to subject said complex to a binding treatment by means of jet jets. water, acting successively against both surfaces of said complex.
  • a treatment line illustrated in more detail in FIG. 2, designated by the general reference (10) making it possible to subject said complex to a binding treatment by means of jet jets. water, acting successively against both surfaces of said complex.
  • such a treatment unit (10) consists of a hydraulic binding unit of the " Jetlace 2000 " type marketed by the Applicant and implementing the teachings of FR-A-2 730 246 (US Pat. A-5,718,022), and FR-A-2,734,285 (US-A-5,768,756) in the name of the Applicant.
  • Such a binding unit consists essentially of a conveyor (11) on which the fibrous structure constituted by the three superimposed layers (V1, S and V2) is transferred.
  • the structure is compacted between the conveyor (11) and a first suction cylinder (12), preferably coated with a microperforated envelope, the holes of which are arranged randomly as described in FIG. French Patent 2,734,285.
  • this cylinder may be coated with a wire mesh.
  • the complex web (V1 / S / V2), designated in the rest of the description by the reference (N), can receiving a first wetting treatment, by means of a ramp (13), shown in dashed lines in Figure 2, and which delivers a water curtain which passes through the conveyor belt (11) and the superimposed sheets.
  • the compacted complex supported by the suction drum (12), is then subjected to the action of jets of water coming from an injector (14), the jets thus acting against the surface constituted by the fibrous web (V1) and causing the fibers that constitute the veil inside the complex.
  • the ramp or injector (14) arranged parallel to a generatrix of the cylinder (12), is a conventional ramp which makes it possible to create jets or water needles having a diameter of 100 to 170 microns, the jets being spaced from each other between 0.5 and 2.2 mm, the supply pressure itself between 50 and 150 bar depending on the grammage of the complex.
  • the treated complex is brought to the surface of a second cylinder (15) identical to the preceding suction cylinder, associated with one or two series of injectors (16, 17) delivering jets of water which therefore act on the face of the web (N) constituted by the web (V2).
  • the ramps (16, 17) create jets or water needles having a diameter of 100 to 170 microns, said jets being spaced as previously from each other between 0.5 and 2.4 mm, and the supply pressure being between 50 bars and 400 bars.
  • the action of the injectors (16, 17) thus makes it possible to drive the fibers of the web V1 into the thickness of the web (N), said fibers surrounding the continuous filaments and binding thereto.
  • the bonded spun web designated by reference (18) can be directly fed to the drying assembly (19) by passing it over a conventional heating drum (26) before being received.
  • a third hydraulic bonding treatment can be achieved by means of a third suction drum (20) associated with a nozzle ramp (21), whose jets act against the face which was constituted by the veil (V1).
  • Such a treatment consists, as is more particularly apparent from FIG. 2, in transferring the bonded "spun" sheet (18) to an assembly produced for example in accordance with the teachings of patent EP 059 608.
  • such an assembly is constituted by a conveyor belt (22), of the "Fourdrinier” type, used in the paper industry.
  • the bound spun (18) held on this fabric is subjected to the action of a series of water jets obtained via a ramp (23) projecting a curtain of water against the internal surface of a perforated rotary cylinder (24), these jets reorienting the fibers.
  • a suction assembly (25) for the removal of water is of course provided below the conveyor (22).
  • This example uses the realization of a complex in which the "spunbond" web is trapped between two staple fiber webs.
  • V1 a fiber web (V1) weighing 30 g / m 2 and made of 100% viscose fibers of 1.7 dtex and 38 mm in length is produced.
  • This veil is produced at a speed of 100 m / minute.
  • the web (V1) is transferred to the receiving belt (5) of the installation (1) for producing a web (S) of the "spunbond" type.
  • the "spunbond" sheet produced is obtained from polypropylene and is distributed over the web (V1) so as to form a web consisting of filaments having a title of 1.7 dtex, weighing 40 g / m 2 .
  • the two superimposed layers (V1) and (S) are compressed by means of a pressure roller (8) and a second fiber web (V2) reproduced in a manner similar to the web (V1), weighing 30 g / m 2 , is delivered to the surface of the "spunbond" (S), the superposed layers then being subjected to a new compaction also by means of a pressure roller.
  • the complex formed is fed to a treatment line comprising a hydraulic binding unit (10) of the "Jetlace 2000" type marketed by the Applicant.
  • Such an installation essentially comprises a conveyor belt (11), and three jet treatment units comprising suction cylinders (12, 15, 20) having a diameter of 516 mm and coated with a microperforated envelope whose holes are distributed in a manner as described in French Pat. No. 2,634,285.
  • suction drums (12,15,20) To these suction drums (12,15,20) are associated ramps injectors (14, 16, 17, 21) which act against the surfaces of the complex (N) constituted by the superposition of the web (V1) of the spunbond (S) and the web (V2).
  • the ramps (14,16,17,21) all produce 1,666 jets per meter and are adjusted in the following manner.
  • Downstream of the last hydraulic binding system (20) is a textile assembly consisting of a conveyor belt (22) made of a polyester fabric, associated with a textilisation assembly itself, comprising a rotary perforated drum (24). inside which is disposed an injector (23) supplied with water at 150 bar.
  • This injector (23) produces jets of water of 130 microns in diameter which reorient the fibers. Water from the injector (23) is recovered by means of the suction assembly (25) disposed below the conveyor (22).
  • This sheet is perfectly bonded and has great flexibility, touch, appearance and mechanical characteristics comparable to a traditional textile equivalent weight obtained with fibers of the same nature.
  • This example illustrates the implementation of the method according to the invention for producing a structure composed of a "spunbond” type sheet associated with a single fibrous sheet which, in this embodiment, is formed upstream of the formation zone of the "spunbond” tablecloth.
  • the procedure is as follows.
  • V1 a web of fibers (V1) weighing 20 g / m 2 and made of 100% viscose fibers of 1.7 dtex and 38 mm in length is made.
  • This veil is produced at a speed of 150 m / min.
  • the web (V1) is transferred to the receiving mat (5) of the spunbond unit.
  • a spunbond web (S) made of polypropylene filaments is deposited on the web (V1).
  • This spunbond web of 25 g / m 2 consists of 2 dtex filaments.
  • the two superimposed layers (V1) and (S) are compressed by means of a pressure roller (8) thus forming a complex of 45 g / m 2 which is transferred continuously to a hydraulic bonding unit (10) of the "Jetlace” type. 2000 "marketed by the Applicant.
  • This installation comprises a conveyor belt (11) and two water jet treatment units consisting of suction cylinders (12) and (15) followed by a final conveyor (22) on which is arranged a patterning / textilisation device.
  • the two cylinders (12) and (15) are covered with a microperforated envelope whose holes are arranged in a random manner as described in French Patent 2,634,285.
  • the injectors produce all 1666 water jets of 120 microns per meter and the water pressure in these injectors is respectively 60, 80 and 110 bar.
  • the textilisation of the bound complex on the preceding cylinders is carried out by a perforated drum (23) as described in the preceding example, the injector of which is supplied with a water pressure of 80 bar.
  • the final product of 45 g / m 2 has excellent mechanical properties, superior to those of a spunlace veil made of fibers of the same kind.
  • the appearance and flexibility of the veil are also remarkable, far superior to those of a spunbond polypropylene or polyester equivalent weight bonded by calendering.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)

Claims (6)

  1. Verfahren zur Herstellung eines Vliesstoffes des "Spunbond"-Typs, der zu den durch Kalandrierung mit Hitze verfestigten Spinnvliesen äquivalente mechanische Eigenschaften aufweist und das Erscheinungsbild, den Griff und die Flexibilität eines konventionellen Textilstoffes besitzt, das die kontinuierlichen Schritte beinhaltet:
    - Herstellen eines Vlieses (S) des "Spunbond"-Typs, wobei ein Bündel gesponnener und gedehnter Endlosfilamente auf einem beweglichen Transportband in Form eines nicht verbundenen Vlieses erhalten wird;
    - Zuführen eines Flors (V1 und/oder V2) aus natürlichen und/oder künstlichen und/oder synthetischen nicht-fortlaufenden Fasern, der durch Kardieren erhalten wurde und ein Flächengewicht zwischen 10g/m2 et 50g/m2 aufweist, zu mindestens einer Seite des so gebildeten Spinnvlieses;
    - Verfestigen des so gebildeten Komplexes durch Kaltpressen;
    - Bringen besagten Komplexes, immer noch kontinuierlich, auf eine Linie (10) für die Bearbeitung zum Binden mittels Wasserstrahlen, die gegen die Oberfläche oder die Oberflächen des Komplexes aus den nicht-fortlaufenden Fasern gerichtet sind, Einarbeiten besagter Fasern in Richtung der Dicke, wobei Fasern, die sich in Art einer Spleißung zwischen und um die Endlosfilamente binden, von der Oberfläche her sichtbar bleiben;
    - Durchführen einer Trocknungsbearbeitung;
    - dannach Erhalten des fertigen Produkts.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Vlies (5) des "Spunbond"-Typs auf beiden Seiten durch einen Flor (V1/V2) aus nicht-fortlaufenden Fasern bedeckt ist, wobei einer (V1) direkt vor der Zone, in der der "Spunbond"-Flor entsteht, hergestellt und dem Transportband (11) zugeführt wird, auf welchem die Filamente bereitgestellt sind, die aus der "Spunbond"-Anlage stammen, wobei sich besagte Filamente auf der Oberfläche des Flors (V1) verteilen, und der zweite (V2) nachfolgend der Zone zur Bildung des Vlieses aus Endlosfilamenten zugeführt wird, der somit in einer "Sandwich"-Anordnung zwischen den beiden Faserdecken (V1, V2) eingefügt ist.
  3. Verfahren nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass nach dem Arbeitsgang des Bindens durch Wasserstrahlen und vor der Trocknung eine ergänzende Bearbeitung zur "Textilisierung" ausgeführt wird, die darin besteht, den gebundenen Komplex auf ein grobes Tuch (22) zu bringen und den Vlies der Bearbeitung mit Wasserstrahlen zu unterziehen, die mit Hilfe einer Anordnung erhalten werden, die im Wesentlichen eine drehbare perforierte Trommel (24), in deren Innern eine mit unter Druck stehendem Wasser versorgte Spritzdüse (23) vorgesehen ist, wobei diese Anordnung Strahlen erzeugt, die die Fasern umorientieren, und eine Absauganordnung (25) zur Beseitigung von Wasser, die unterhalb des Förderers vorgesehen ist, aufweist.
  4. Einrichtung zur Herstellung eines Vliesstoffes des "Spunbond"-Typs, die folgendes in einer Reihe angeordnet beinhaltet:
    - eine Anordnung (1) zur Bildung eines Vlieses (S) aus Endlosfilamenten des Typs "Spunbond" auf einem Transportband (5) ;
    - mindestens einer Karde (6 und/oder 9), die die Zuführung eines Flores (V1 und/oder V2) aus nicht-fortlaufenden Fasern mit einem Flächgengewicht zwischen 10g/m2 und 50g/m2 auf mindestens eine Seite des "Spunbond"-Vliesproduktes erlaubt;
    - Mitteln zum Kaltpressen des gebildeten Komplexes, gefolgt von einer Zone (10) zur Bearbeitung mit Flüssigkeitsstrahlen, die zumindest gegen die Oberfläche gerichtet sind, die mit nicht-fortlaufenden Fasern bedeckt ist, und die besagte Fasern in Richtung der Dicke einarbeiten, wobei diese Fasern sich in Art einer Spleißung zwischen und um die Endlosfilamente binden und von der Oberfläche her sichtbar bleiben;
    - Mittel zur Trocknung und zur Entgegennahme des gebundenen Vlieses,
    dadurch gekennzeichnet, dass sie zwischen den Mitteln (10) zum Binden durch Wasserstrahlen und den Mitteln zum Trocknen eine Anordnung zur Textilisation, die ein grobes Tuch (22) zum Stützen des gebundenen Komplexes umfasst, welches verbunden ist mit einer drehbaren perforierten Trommel (24), in deren Innern eine mit unter Druck stehendem Wasser versorgte Spritzdüse (23) vorgesehen ist, wobei diese Anordnung Strahlen erzeugt, die die Fasern umorientieren, und eine Absauganordnung (25) zur Beseitigung von Wasser, die unterhalb des Förderers vorgesehen ist, umfasst.
  5. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, dass sie vorgelagert und nachgelagert der Zone zur Bildung eines "Spunbond"-Vlieses Mittel (6, 9) umfasst, die es erlauben einen Faserflor herzustellen, wobei der vorgelagert hergestellte Flor (V1) dem Transportband (5) der "Spunbond"-Linie zugeführt wird, wobei das Bündel extrudierter und gedehnter Filamente direkt auf besagtem Flor entgegengenommen wird, und der zweite (V2) nachfolgend der Zone zur Bildung des "Spunbond"-Flors ausgegeben und der Oberfläche dieses letzteren zugeführt wird.
  6. Vliesstoff, erhalten durch Ausführung des Verfahrens nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, das er sich aus einem Vlies zusammensetzt, der ausgehend von Endlosfilamenten hergestellt wird, die mit einem kardierten Flor aus nicht-fortlaufenden Fasern mit einem Flächengewicht zwischen 10 g/m2 und 50 g /m2, einer Länge zwischen 5 mm und 60 mm und einem Titer zwischen 0,8 dtex und 6,6 dtex verbunden sind, der zumindest eine Seite des nicht in sich verbundenen Vlieses auf Basis von Endlosfilamenten bedeckt, und der in das Innere dieses letzteren eindringt und sich dabei um die genannten Filamente bindet.
EP00931356A 1999-06-10 2000-05-26 Verfahren zur herstellung eines vliesstoffes, anlage zur durchführung dieses verfahren, hergestellter vliesstoff Expired - Lifetime EP1192306B1 (de)

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FR9907602A FR2794776B1 (fr) 1999-06-10 1999-06-10 Procede pour la realisation d'un materiau non tisse, installation pour sa mise en oeuvre et non tisse ainsi obtenu
FR9907602 1999-06-10
PCT/FR2000/001428 WO2000077286A1 (fr) 1999-06-10 2000-05-26 Procede pour la realisation d'un materiau non tisse, installation pour sa mise en oeuvre et non tisse ainsi obtenu

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WO2000077286A1 (fr) 2000-12-21
CN1355864A (zh) 2002-06-26
FR2794776B1 (fr) 2001-10-05
AU4932000A (en) 2001-01-02
ATE336611T1 (de) 2006-09-15
IL146867A0 (en) 2002-08-14
JP2003502515A (ja) 2003-01-21
ES2270833T3 (es) 2007-04-16
PL352192A1 (en) 2003-08-11
FR2794776A1 (fr) 2000-12-15
DE60030120T2 (de) 2007-02-15
US20020157766A1 (en) 2002-10-31
DE60030120D1 (de) 2006-09-28
EP1192306A1 (de) 2002-04-03
TR200103471T2 (tr) 2002-07-22
DK1192306T3 (da) 2006-12-11

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