US20020160681A1 - Method for the production of nonwoven webs, the cohesion of which is obtained by means of fluid jets - Google Patents

Method for the production of nonwoven webs, the cohesion of which is obtained by means of fluid jets Download PDF

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Publication number
US20020160681A1
US20020160681A1 US10/116,877 US11687702A US2002160681A1 US 20020160681 A1 US20020160681 A1 US 20020160681A1 US 11687702 A US11687702 A US 11687702A US 2002160681 A1 US2002160681 A1 US 2002160681A1
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Prior art keywords
web
fibers
jets
raised
bonding
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Abandoned
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US10/116,877
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English (en)
Inventor
Frederic Noelle
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Rieter Perfojet SAS
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Rieter Perfojet SAS
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Assigned to RIETER PERFOJET reassignment RIETER PERFOJET ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NOELLE, FREDERIC
Publication of US20020160681A1 publication Critical patent/US20020160681A1/en
Priority to US10/783,141 priority Critical patent/US6796010B2/en
Abandoned legal-status Critical Current

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    • 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
    • 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
    • D04H1/44—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
    • D04H1/492—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
    • D04H1/495—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 for formation of patterns, e.g. drilling or rearrangement
    • 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
    • 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]
    • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
    • 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]
    • Y10T442/689—Hydroentangled 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]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials
    • 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]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials
    • Y10T442/698—Containing polymeric and natural strand or fiber materials

Definitions

  • nonwoven fabrics, knitted fabrics
  • nonwoven structures which, in general terms, may be classified in three large categories by virtue of the actual process for manufacturing them, to be precise nonwovens known as “by the dry way” and “by the melted way” and nonwovens known as “by the wet way”.
  • this technique involves carrying out the interlacing of the elementary fibers with one another by means of the action of jets of water under pressure which act on the fibrous structure in the manner of needles and make it possible to reorient part of the fibers forming the web in the direction of thickness.
  • Such a technology has been widely developed at the present time and is used not only for producing what are known as “spunlace” structures for textile use, such as, in particular for applications in the medical and hospital fields, for wiping, filtration and wrappings for teabags, but also for making tiny perforations in continuous supports such as paper, cardboard, films, even sheets of plastic or the like and the articles obtained may be regular and homogeneous and take the form of a plane sheet which, if appropriate, may have perforations, as may be gathered from the patent U.S. Pat No. 3,508,308, and even, if appropriate, comprise designs resulting from the reorientation of the fibers, this being essentially for an esthetic purpose, as may be gathered from U.S. Pat. No. 3,485,706.
  • the invention is particularly suitable for producing such articles, and, in the rest of the description, it will be described more particularly for obtaining such products.
  • nonwoven webs consisting entirely of absorbent fibers, such as cellulose fibers, particularly viscose fibers.
  • absorbent fibers such as cellulose fibers, particularly viscose fibers.
  • a mixture of synthetic fibers (polyester, polypropylene) and of artificial fibers (viscose) is preferably used.
  • Such a product has good mechanical resistance characteristics, essentially afforded by the synthetic fibers, and good liquid absorption and retention characteristics imparted by the cellulose fibers.
  • the treatment involves treating a basic web composed of elementary fibers of the same type or of different types, compressing and moistening this basic web and then intermingling the fibers by means of at least one rack of contiguous jets of water under high pressure acting on the basic web.
  • the basic web is advanced positively on an endless porous support in motion, and it is brought onto the surface of a perforated rotary cylindrical drum, to the interior of which a partial vacuum is applied.
  • the basic web is compressed mechanically between the porous support and the rotary drum which both advance substantially at the same speed.
  • a water curtain is directed onto the web and passes successively through the porous support, the compressed basic web and the supporting perforated drum which sucks up the excess water.
  • the elementary fibers are intermingled continuously, still on the rotary cylindrical drum, by the compressed and wetted web being subjected to the action of at least one rack of jets of water under high pressure.
  • bonding is carried out by means of a plurality of successive racks of water jets which act either on the same face or alternately against the two faces of the web, the pressure within the racks and the velocity of the jets discharged varying from one rack to the next and usually progressively.
  • the perforated roller preferably comprises randomly distributed micro-perforations.
  • the nonwoven structure may be subjected to a second treatment applied to the reverse face.
  • a method has been found, this being the subject of the present invention, which not only makes it possible to produce absorbent nonwovens having excellent physical properties (tensile strength, tearing strength, abrasion resistance) and a good capacity for the absorption and retention of liquid similar to articles of the same composition obtained according to the teachings of FR-2 734 285 but which, moreover, has, in relation to such articles, a more pleasant handle and increased bulk.
  • the invention relates to a method making it possible to produce a novel type of nonwoven consisting at least partially of hydrophilic elementary fibers, which involves continuously:
  • the method according to the invention is characterized in that, after bonding treatment by means of water jets and before drying and reception, the prebonded and moistened web is transferred to an additional assembly for treatment by the action of one or more series of water jets, said assembly comprising a movable suction surface taking the form of a drum covered with an open-work structure consisting of a woven metal-wire cloth and shaped to have a succession of raised and recessed zones.
  • the first treatment by means of water jets is carried out according to the teachings of FR-A-2 730 246 and FR-A-2 734 285, the content of which is incorporated in the present description as required.
  • a perforated rotary cylindrical suction drum consists of a honeycomb structure which is covered with a perforated plate and which rotates about a second hollow fixed coaxial cylindrical drum connected to a partial vacuum source in order to form a suction box below the zones where the water jets act.
  • said drum is covered with a likewise perforated or intrinsically porous structure having raised and recessed zones, this structure preferably consisting of a woven fabric taking the form of a removable sleeve.
  • covering structure preferably used for the suction drum will be a woven cloth which is produced, for example, from bronze wires, and which has the characteristic of being capable of being embossed.
  • the ratio of emptiness in relation to the surface is between 10% and 50%, and the overall height between the bottom of the recessed parts and the upper part of the raised zones is generally between 0.5 mm and 2 mm.
  • the configuration of the raised and recessed portions which such a cloth will have may be of any type, for example, may take the form of herringbones, of designs with exact contours (circular, square) or a crimped, crinkled, etc. appearance.
  • the complex before treatment on the embossed surface, may, if appropriate, receive a second bonding treatment by means of jets, which is carried out in a similar way to the preceding treatment, but on the opposite face.
  • the nonwoven After treatment, the nonwoven, still in the wet state, is transferred to a squeezing-out zone, followed by a drying zone consisting of a through-air drum. Finally, it is received in the form of a wound package.
  • Such a method can be implemented for fibrous webs of any composition produced from natural, artificial and/or synthetic fibers taken alone or in a mixture.
  • For the production of absorbent nonwovens it is conceivable to produce a web consisting entirely of viscose fibers.
  • the linear density of the elementary fibers and their length are preferably similar and, for example, are between 1 dtex and 3.3 dtex, the length being between 20 mm and 60 mm.
  • FIG. 1 is a diagrammatic view of the whole of a production line for a nonwoven web according to the invention, the cohesion of which is imparted by the action of jets of water under pressure, FIGS. 1 a and 1 b being enlarged views of the zones circled in this FIG. 1, and FIG. 1 c illustrating the structure of a conventional bonding zone used within the framework of the comparative examples which will be given later;
  • FIG. 2 is a diagrammatic view of a production line for a nonwoven web produced according to the invention, making it possible to produce mixed webs, synthetic fibers/wood fibers, FIGS. 2 a, 2 b, 2 c and 2 d being enlarged views of the zones circled in FIG. 2;
  • FIG. 3 is a reproduction of an embossed structure used within the scope of the invention.
  • FIG. 4 is a reproduction of the effect obtained on the final product
  • FIG. 5 is another embodiment in which the embossed surface makes it possible to obtain a recessed and raised effect of the “crinkled” type.
  • a production line making it possible to produce a nonwoven in accordance with the method according to the invention is composed essentially of an assembly, designated by the general reference ( 1 ), making it possible to produce, by carding or another similar technique, a web which may consist either entirely of artificial fibers, particularly viscose, or of a mixture of artificial fibers and of synthetic fibers, such as polyester or polypropylene.
  • a porous conveyer belt ( 11 ) consisting, for example, of an endless cloth which is produced from synthetic monofilament, in particular from polyester, and which has a porosity of between 30 and 60%, that is to say a ratio between the solid areas and the empty areas of between 30 and 60%, preferably around 50%.
  • This porous support ( 11 ) is associated, in a way similar to the teachings of FR-A-2 730 246, with an assembly for treatment by water jets, making it possible, on the one hand, to ensure the compression and wetting of the web ( 10 ) formed and, on the other hand, to subject this web to the action of racks of water jets.
  • Such an assembly comprises essentially a rotary cylindrical drum designated by the general reference ( 20 ), in bearing contact against the surface of the conveyer belt ( 11 ).
  • a first rack of water jets ( 21 ) is arranged below the support ( 11 ) and makes it possible to carry out the prewetting of the web ( 10 ).
  • This rack is arranged at a distance of between 70 and 100 mm from the porous support ( 11 ) and forms a water curtain making it possible to wet the compressed web and bringing about a first slight intermingling of the web.
  • the drum ( 20 ) is composed of a conventional rotary cylinder with a honeycomb structure (not illustrated in the accompanying figures), which is covered with a metal film ( 22 ) comprising microperforations distributed randomly on its surface or with a woven structure.
  • This rotary cylinder surrounds a second hollow fixed coaxial cylindrical drum ( 23 ) connected to a partial-vacuum source so as to form a suction box, suction being applied through slits ( 26 ) located opposite the active zone of the water jets.
  • These racks ( 21 , 24 , 25 ) are formed from contiguous injectors arranged at predetermined distances from one another.
  • each rack ( 21 , 24 , 25 ) the drum comprises a slit ( 26 ) which extends over the entire length of a generatrix, the width of which is generally between 5 mm and 30 mm and through which the water of the jets ( 27 ) is recovered.
  • a second assembly which is produced according to the invention, and the general structure of which may be gathered from FIG. 1 b .
  • This assembly ( 28 ) consists of a rotary suction drum ( 29 ), which likewise consists of a honeycomb cylindrical structure, not illustrated in FIG. 1 b , and which does not support a microperforated band, as in the case of the treatment assembly ( 20 ), but, instead, a covering consisting of an open-work plate ( 29 ).
  • the perforations of this plate ( 29 ) may have a diameter of 3 mm, the center distance between two consecutive orifices being 4 mm, and the orifices being offset from one row to the next.
  • the perforated surface ( 29 ) is covered with a sleeve-shaped open-work structure ( 30 ) having a succession of raised and recessed zones.
  • This open-work structure ( 30 ) consists of an open-work cloth made from metal wires, more particular from bronze wires, having an aperture ratio of between 10% and 50%, said cloth having been embossed, as may be gathered from FIGS. 3 and 5, in order to comprise a succession of raised and recessed zones.
  • These raised and recessed zones may have a regular structure, for example a herringbone shape, as illustrated in FIG. 3, or a configuration forming irregular designs, giving, for example, a crinkled appearance, as illustrated in FIG. 5.
  • the prebonded web is restructured by the action of one or more series of jets coming from conventional hydraulic injectors, of which there are two in the present instance. Under the action of these jets, the web matches the configuration of the raised and recessed zones of the open-work structure ( 30 ).
  • the treated web ( 31 ) is delivered onto a conveyer ( 32 ), where the water is eliminated, for example with the aid of a suction box arranged below the conveyer ( 32 ), the treated web then being dried by passage over a through-air cylinder ( 33 ) having a temperature of the order of 150° C., before being received in the form of a wound package ( 34 ).
  • FIG. 2 illustrates a second embodiment of a production line for a nonwoven, making it possible to produce mixed webs, synthetic fibers—cellulose fibers, for example wood fibers, which is designed for implementing the method according to the invention.
  • FIGS. 2 a , 2 b, 2 c and 2 d are enlarged views of the treatment zones circled in FIG. 2.
  • such a production line is produced according to the teachings of the document FR-A-2 781 818, which makes it possible to produce nonwovens consisting of a mixture of elementary fibers of different types and, more particularly, of a mixture of synthetic fibers which is associated with cellulose fibers, in particular wood fibers.
  • a mixed non-woven is produced in the following way.
  • a first web ( 10 ) is produced, by carding ( 1 ) or another conventional technique, from chemical fibers.
  • the fibrous web ( 10 ) produced is then subjected to a bonding treatment by means of water jets on a first treatment assembly designated by the reference ( 40 ).
  • the two faces of the fibrous web ( 10 ) are subjected to the action of water jets by passage around two suction cylinders, the first comprising microperforations on the surface and the second being covered with a coarse cloth, as may be gathered from FIG. 2 a.
  • the web After the web has been treated, it is transferred onto a conveyer ( 50 ), and natural fibers ( 52 ), such as wood fibers (cf. FIG. 2), are deposited on the surface of said web ( 10 ).
  • natural fibers such as wood fibers (cf. FIG. 2)
  • the complex structure thus produced is subsequently treated, according to the invention, on an assembly, designated by the general reference ( 28 ), illustrated in FIG. 2 d , this assembly being similar to that illustrated in FIG. 1 b and described above.
  • a mixed nonwoven ( 31 ) is obtained, comprising raised and recessed designs, which is received on a belt ( 32 ) in order subsequently to be dried at ( 33 ) and received at ( 34 ).
  • the method according to the invention is implemented on an installation, as illustrated by FIGS. 1, 1 a and 1 b , for the purpose of producing a product according to the invention consisting of a single type of hydrophilic fibers, to be precise viscose fibers.
  • a web ( 10 ) is produced, weighing approximately 65 gm 2 and composed of 100% viscose fibers of 1.7 dtex and with a length of 38 mm, this web being produced at a speed of 50 m/min by a card for nonwovens ( 1 ).
  • This web ( 10 ) is transported by a conveyer belt ( 11 ) to a hydraulic bonding unit of the type sold under the designation “Jetlace 2000”, designed for implementing the method according to the invention.
  • the web ( 10 ) is compacted between the transport conveyer ( 11 ) and a first bonding cylinder ( 20 ), covered with a microperforated casing, the holes being arranged randomly, as described in French patent 2 734 285.
  • the web is wetted by means of the rack ( 21 ) located behind the transport conveyer, just after the compacting point, said rack being arranged perpendicularly to the generatrix of the cylinder.
  • the bonded web undergoes additional treatment according to the invention (FIG. 1 b ) by being passed over a cylinder, likewise covered with a perforated casing ( 29 ) on which is arranged a sleeve consisting of a bronze fabric ( 30 ) comprising 15 wires/cm and 15 wefts/cm, having a diameter of 0.24 mm and possessing an emptiness ratio of 40.8%.
  • This bronze sleeve ( 30 ) is embossed so as to have a herringbone design (as illustrated in FIG. 5), the depth of which is of the order of one and a half millimeters (1.5 mm).
  • the fibrous web is subjected to the action of two successive hydraulic injectors delivering jets with a diameter of 120 microns at a velocity of 200 m/second, the jets being spaced 0.6 mm from one another.
  • the web is subsequently transferred onto a suction belt ( 32 ) connected to a vacuum generator, then dried at a temperature of 145° C. in a through-air oven ( 33 ), in order finally to be received, for example, in the form of a wound package ( 34 ).
  • a nonwoven is obtained, which weighs approximately 60 g/m 2 and has a herringbone design ( 35 ), as illustrated in FIG. 4, this design having excellent definition. It is permanent and friction-resistant.
  • a product consisting of a 70/30 mixture of viscose and polyester fibers is produced.
  • the fibers have a linear density of 1.7 dtex and a length of 38 mm.
  • the web formed weighs approximately 65 g/m 2 at the exit of the card and 60 g/m 2 after treatment.
  • This example illustrates an actual embodiment of a nonwoven according to the invention, consisting of a mixture of synthetic fibers and of natural fibers, and, more particularly, of cellulose fibers, especially wood fibers.
  • a production line as illustrated in FIG. 2, is used, which, in general terms, is produced according to the teachings of the document FR-A-2 781 818, except that it comprises, before drying at ( 33 ), and after bonding and prewetting treatment carried out by means of the jets ( 53 ), an additional assembly ( 28 ) for treatment by the action of water jets, said assembly comprising a movable suction surface taking the form of a drum covered with an open-work structure ( 30 ) and consisting of a woven metal-wire cloth shaped so as to have a succession of raised and recessed zones.
  • a first web ( 10 ) is produced at 60 m/min, weighing 30 g/m 2 and consisting of polyester fibers of 38 mm and of 1.7 dtex, said web being introduced to a hydraulic bonding unit of the type sold by the applicant under the designation “Jetlace 2000”, by means of a transport conveyer ( 11 ).
  • the web is compacted between this conveyer and a first assembly, designated with the general reference ( 40 ), which comprises a bonding cylinder covered with a microperforated casing, the holes of which are arranged randomly. After compaction, the web is prewetted by means of a rack located behind the transport conveyer ( 11 ), just after the compacting point, and arranged perpendicularly to the generatrix of the cylinder.
  • a first assembly designated with the general reference ( 40 )
  • the web is prewetted by means of a rack located behind the transport conveyer ( 11 ), just after the compacting point, and arranged perpendicularly to the generatrix of the cylinder.
  • the web thus compacted and wetted is subjected to the action of two hydraulic injectors projecting water jets with a diameter of 120 microns at increasing velocities of 78 and 94 m/s, the water jets being spaced 1.2 mm from one another.
  • the web is then introduced to the assembly designated by the general reference ( 48 ), which comprises a second cylinder covered with a coarse cloth consisting of 9 wires per centimeter, made of bronze, with a rectangular cross section with sides of 0.3 mm by 6.64 mm in the warp direction and of 9 wires per centimeter, likewise made of bronze, with a diameter of 0.46 mm in the weft direction.
  • the assembly designated by the general reference ( 48 ) which comprises a second cylinder covered with a coarse cloth consisting of 9 wires per centimeter, made of bronze, with a rectangular cross section with sides of 0.3 mm by 6.64 mm in the warp direction and of 9 wires per centimeter, likewise made of bronze, with a diameter of 0.46 mm in the weft direction.
  • Two hydraulic injectors are arranged above this cylinder. They project onto the web water jets with a diameter of 120 microns at velocities of 100 m/s, the jets being spaced 0.5 mm from one another.
  • the product at the exit of this conveyer has a crimped appearance of the pyramidal type, with different fiber density zones.
  • the web is then introduced to a pneumatic lapping machine ( 51 ) which deposits 35 g/m 2 of cellulose fibers.
  • the web is introduced onto another conveyer ( 54 ), above which are arranged four hydraulic injectors ( 53 ) projecting water jets with a diameter of 120 microns, spaced 0.6 mm from one another, at velocities of 150 m/s.
  • the product thus obtained therefore takes the form of a prebonded and moistened web which is subsequently transferred to an additional treatment assembly, designated by the general reference ( 28 ).
  • an additional treatment assembly designated by the general reference ( 28 ).
  • Such an assembly comprises a cylinder covered with a bronze sleeve which is identical to that used in example (1) and which is embossed so as to have a herringbone design.
  • the fibrous web is subjected to the action of two successive hydraulic injectors delivering jets with a diameter of 120 microns at a velocity of 60 m/s, the jets being spaced 0.6 mm from one another.
  • the product thus obtained by the method according to the invention is subsequently transferred onto a suction belt ( 32 ) connected to a vacuum generator and is then dried at a temperature of 160° C. in a through-air oven, in order, finally to be received in the form of a wound package ( 34 ).
  • example 3 is concerned, this is produced on a production line, as illustrated in FIG. 2, but not comprising a treatment assembly ( 28 ).
  • nonwovens which have the same composition and virtually the same weight as those produced according to the invention, but do not comprise any designs.
  • Example 2 Example 3 Characteristics Comparative Comparative Comparative Weight g/m 2 60 60 60 60 55 55 Thickness in mm 0.71 0.50 0.82 0.58 0.61 0.44 Density in g/cm 3 0.085 0.12 0.073 0.103 0.090 0.125 Resistance dry 115 120 112 114 108 110 in the longitudinal wet 58 59 98 92 99 101 direction (SL) N/50 mm Resistance dry 21 20 18 22 21 19 in the transverse wet 15 14 17 20 18 17 direction (ST) N/50 mm Elongation dry 25 29 30 27 31 30 in the longitudinal wet 26 28 35 33 30 29 direction (SL) in % Elongation dry 123 134 129 133 185 189 in the transverse wet 99 100 124 126 184 185 direction (ST) in % Absorption rate g/g 928 906 850 826 833 824
  • the materials produced according to the invention have the advantage of being much thicker for an equal weight.
  • the novel products have an agreeable and favorable textile appearance which increases their commercial value.
  • embossed bronze fabric comprising 15 wires in warp and in weft, of which the diameter is 0.24 mm and the aperture ratio 40.8%, is used, it will be conceivable to use other types of embossed structures.
  • the embossed bronze cloth has 23.5 wires/cm both in warp and in weft, said wires having a diameter of 0.19 mm and the aperture ratio being 30.5%.
  • the method according to the invention may also be implemented in order to obtain mixed nonwovens consisting of a mixture of fibers of different types.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
US10/116,877 1999-10-05 2002-04-05 Method for the production of nonwoven webs, the cohesion of which is obtained by means of fluid jets Abandoned US20020160681A1 (en)

Priority Applications (1)

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US10/783,141 US6796010B2 (en) 1999-10-05 2004-02-20 Method for the production of nonwoven webs, the cohesion of which is obtained by means of fluid jets

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FRFR-99.12601 1999-10-05
FR9912601A FR2799214B1 (fr) 1999-10-05 1999-10-05 Procede pour la realisation de nappes non tissees dont la cohesion est obtenue par l'action de jets de fluide
PCT/FR2000/002633 WO2001025522A1 (fr) 1999-10-05 2000-09-22 Procede pour la realisation de nappes non tissees dont la cohesion est obtenue par l'action de jets de fluide

Related Parent Applications (1)

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PCT/FR2000/002633 Continuation WO2001025522A1 (fr) 1999-10-05 2000-09-22 Procede pour la realisation de nappes non tissees dont la cohesion est obtenue par l'action de jets de fluide

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US10/783,141 Expired - Lifetime US6796010B2 (en) 1999-10-05 2004-02-20 Method for the production of nonwoven webs, the cohesion of which is obtained by means of fluid jets

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WO2005124001A1 (en) * 2004-06-18 2005-12-29 Suominen Nonwovens Ltd. Method and apparatus for manufacturing nonwoven fabric
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US20070017076A1 (en) * 2005-07-25 2007-01-25 Hien Nguyen Low-density, non-woven structures and methods of making the same
US20070017075A1 (en) * 2005-07-25 2007-01-25 Hien Nguyen Low-density, non-woven structures and methods of making the same
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US20070180671A1 (en) * 2003-09-18 2007-08-09 Frederic Noelle Machine for forming a pattern on a nonwoven and process for manufacturing a sleeve for this machine
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US20080193790A1 (en) * 2005-05-20 2008-08-14 Rieter Perfojet Drum For a Machine Producing a Patterned Nonwoven and Obtained Fabric
WO2010123388A1 (en) * 2009-04-20 2010-10-28 Zakłady „Lentex” Spółka Akcyjna Nonwoven fabric, a method of its preparation and its use
WO2017039629A1 (en) * 2015-08-31 2017-03-09 Kimberly-Clark Worldwide, Inc. Low basis weight nonwoven web with visibly distinct patterns
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CN114457507A (zh) * 2022-02-10 2022-05-10 浙江华基环保科技有限公司 一种涤纶防糊袋针刺毡的生产工艺
CN115434074A (zh) * 2022-09-15 2022-12-06 东纶科技实业有限公司 一种水刺用铜网3d提花网套及其制备方法和应用

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US20020102289A1 (en) * 2000-11-30 2002-08-01 Anja Drucks Cosmetic or dermatological impregnated wipes
US6865784B2 (en) 2002-01-15 2005-03-15 Rieter Perfojet Machine for producing a patterned textile product and nonwoven product thus obtained
US7758945B2 (en) 2002-01-15 2010-07-20 Rieter Perfojet Machine for producing a patterned textile product and nonwoven product thus obtained
US20030131454A1 (en) * 2002-01-15 2003-07-17 Frederic Noelle Machine for producing a patterned textile product and nonwoven product thus obtained
US20070173163A1 (en) * 2002-10-18 2007-07-26 Rieter Perfojet Low-density nonwoven fabric and production method and installation therefor and uses
US20040198118A1 (en) * 2002-12-16 2004-10-07 Levine Mark J. Hydroentangling using a fabric having flat filaments
US20070000107A1 (en) * 2003-01-14 2007-01-04 Patrick Jeambar Manufacturing process of a composite nonwoven and installation for carrying out said process
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US20070180671A1 (en) * 2003-09-18 2007-08-09 Frederic Noelle Machine for forming a pattern on a nonwoven and process for manufacturing a sleeve for this machine
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WO2005124001A1 (en) * 2004-06-18 2005-12-29 Suominen Nonwovens Ltd. Method and apparatus for manufacturing nonwoven fabric
JP2008523270A (ja) * 2004-12-22 2008-07-03 ザ プロクター アンド ギャンブル カンパニー 可視的な圧縮部位を有する予め湿潤された不織布ウェブ
US20060229964A1 (en) * 2005-04-06 2006-10-12 Fred Fox Personal pension system and business method
US20080193790A1 (en) * 2005-05-20 2008-08-14 Rieter Perfojet Drum For a Machine Producing a Patterned Nonwoven and Obtained Fabric
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US20070017075A1 (en) * 2005-07-25 2007-01-25 Hien Nguyen Low-density, non-woven structures and methods of making the same
US20070017076A1 (en) * 2005-07-25 2007-01-25 Hien Nguyen Low-density, non-woven structures and methods of making the same
US20080053635A1 (en) * 2006-08-29 2008-03-06 N.R. Spuntech Industries Ltd. Cylindrical suction box assembly
US7785444B2 (en) * 2006-08-30 2010-08-31 N.R. Spuntech Industries Ltd Cylindrical suction box assembly
WO2010123388A1 (en) * 2009-04-20 2010-10-28 Zakłady „Lentex” Spółka Akcyjna Nonwoven fabric, a method of its preparation and its use
WO2017039629A1 (en) * 2015-08-31 2017-03-09 Kimberly-Clark Worldwide, Inc. Low basis weight nonwoven web with visibly distinct patterns
CN108796641A (zh) * 2018-09-06 2018-11-13 澳洋集团有限公司 一种石墨四氟合成纤维加工用喷纱装置
CN114457507A (zh) * 2022-02-10 2022-05-10 浙江华基环保科技有限公司 一种涤纶防糊袋针刺毡的生产工艺
CN115434074A (zh) * 2022-09-15 2022-12-06 东纶科技实业有限公司 一种水刺用铜网3d提花网套及其制备方法和应用

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EP1226297B1 (fr) 2006-06-14
DK1226297T3 (da) 2006-10-16
ATE330049T1 (de) 2006-07-15
US20040158962A1 (en) 2004-08-19
EP1226297A1 (fr) 2002-07-31
WO2001025522A1 (fr) 2001-04-12
US6796010B2 (en) 2004-09-28
DE60028804D1 (de) 2006-07-27
AU7530400A (en) 2001-05-10
ES2265979T3 (es) 2007-03-01
DE60028804T2 (de) 2007-06-14
FR2799214B1 (fr) 2001-11-16
FR2799214A1 (fr) 2001-04-06

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