US20030034115A1 - Non woven textile structure incorporating stabilized filament assemblies - Google Patents

Non woven textile structure incorporating stabilized filament assemblies Download PDF

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Publication number
US20030034115A1
US20030034115A1 US10/271,767 US27176702A US2003034115A1 US 20030034115 A1 US20030034115 A1 US 20030034115A1 US 27176702 A US27176702 A US 27176702A US 2003034115 A1 US2003034115 A1 US 2003034115A1
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United States
Prior art keywords
set forth
filament
nonwoven textile
textile structure
assembly
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Abandoned
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US10/271,767
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English (en)
Inventor
Georg Barth
Edmund Carus
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Lohmann GmbH and Co KG
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Lohmann GmbH and Co KG
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Filing date
Publication date
Application filed by Lohmann GmbH and Co KG filed Critical Lohmann GmbH and Co KG
Assigned to LOHMANN GMBH & CO KG reassignment LOHMANN GMBH & CO KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARTH, GEORG MARTIN, CARUS, EDMUND HUGH
Priority to GB0303293A priority Critical patent/GB2394232A/en
Publication of US20030034115A1 publication Critical patent/US20030034115A1/en
Priority to PCT/GB2003/004293 priority patent/WO2004035902A1/fr
Priority to AU2003271900A priority patent/AU2003271900A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/06—Embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • 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
    • D04H3/02—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
    • D04H3/04—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 in rectilinear paths, e.g. crossing at right angles
    • 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0028—Stretching, elongating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/04—Cellulosic plastic fibres, e.g. rayon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/73—Hydrophobic
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • 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]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • 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]
    • Y10T442/643—Including parallel strand or fiber material within the 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

Definitions

  • the present invention relates to nonwoven textile materials and in particular to composite absorbent textile materials.
  • the present invention has particular application to absorbent textile materials or structures for uses in the medical field, for example in or as dressings, sponges or swabs and laparotomy sponges. There are applications also in the fields of sanitary protection, infant care and adult incontinence protection.
  • Nonwoven materials made by many different processes have been utilised as components to produce absorbent materials for use in feminine hygiene, infant diapers and incontinence products.
  • Modern technologies utilising fluff pulp structures often combined with other non-woven materials to form multilayer composites, have been used to facilitate fluid capture, distribution and containment.
  • Other materials such as superabsorbent polymers are often incorporated in these composites to maximise fluid containment.
  • these specifications disclose production of a layer or layers of continuous “tow” filaments which are bonded in various ways and which may be of cellulose acetate, or of polyethylene, polypropylene, polyamide, polyester, polyvinyl acetate, viscose or rayon, or bi-component polymers. Steps in production of said layer can include crimping or curling, then stretching and distributing the “tow” filaments in various ways, then bonding same in a pattern of lines, spots or points by any suitable technique including thermal or ultrasonic bonding, calendering, laser or print-bonding or undefined hydroentanglement. The filaments are cut to length either before or after the aforesaid bonding.
  • the “tow” filaments can be bonded, at the same time as the pattern of bonding mentioned above, to a liquid containment layer which can be a non-woven composite material.
  • a liquid containment layer which can be a non-woven composite material.
  • some further details are provided of the method of handling the “tow” filaments to produce a finished layer or layers.
  • the prior art describes conventional bonding of tow filaments by various techniques, all of which depress the performance of such tow assemblies by capillary blockage at points of bonding.
  • the present object is to provide an improved manner of handling continuous filaments to facilitate their incorporation into a finished product, which has enhanced properties, e.g. of absorbency and/or fluid management, compared to known products.
  • a method of producing a non-woven textile structure comprises the steps of initially stretching a plurality of substantially parallel continuous tow filaments to provide a partially stabilized filament assembly, further constraining said filament assembly by folding, bundling or twisting operations, subjecting this constrained filament assembly to low hydroentangling pressures, and bonding the resulting filament assembly to a carrier layer or layers.
  • An alternative to hydroentangling is light tacking.
  • the initial stages of the method of the invention require tow stretching followed by a carefully controlled corrugation or compaction procedure using for example, overfeed technology such as forced fluid or air injection stuffer box processes.
  • overfeed technology such as forced fluid or air injection stuffer box processes.
  • One or more of the resulting three dimensional stabilized tow assemblies can then be incorporated into simple composite structures by appropriate highly controlled light bonding means such as, but not limited to, controlled light hydroentangling.
  • appropriate highly controlled light bonding means such as, but not limited to, controlled light hydroentangling.
  • one or more such stabilized tow assemblies can be bonded to a carrier layer of nonwoven fabric, or between respective outer layers of nonwoven fabric.
  • Such bonding retains the capillary structures in these consolidated tow assemblies. Any capillary tortuosity as a result of controlled light hydroentangling can be accepted since the capillary matrices remain substantially intact and functional.
  • nonwoven fabric outer layers serves to preserve the capillarity of the three dimensional tow assemblies by lessening the impact of resultant hydroentangling water jets on these assemblies by a shielding action.
  • the nonwoven fabrics are lightly mechanically adhered to the tow assemblies to form the completed desired composite assemblies.
  • the outer nonwoven fabric layers adhere to each other as a consequence of the controlled hydroentangling procedure.
  • Such composite structures can, of course, contain more than or less than three layers of material, and these layers may include, in addition to fully consolidated tow assemblies, the nonwoven fabrics already mentioned and/or other materials appropriate to the desired end-use.
  • the materials or structures described in this disclosure can be made into converted pieces with controlled tow assembly deposition.
  • the simplest product envisaged is a single elongate stabilized tow assembly of the type already described and of somewhat flattened cross-sectional shape bonded to a nonwoven fabric web. This could serve as or be incorporated with other layers as a bandage.
  • the tow assembly would be sandwiched between respective outer layers of nonwoven fabric and bonded thereto, by hydroentanglement or tacking, as already outlined. In either form, there may be free edge margins where no tow assembly is present and there is only a marginal strip of carrier material, or the outer layers are bonded to each other.
  • Another way of obtaining smaller individual products, like dressings, is to cut the single stabilized tow assembly, mentioned above, into short sections and spaced these apart longitudinally before sandwiching between outer layers and further bonding.
  • the fully consolidated filament assemblies can be secured during their preparation and/or prior to the final composite assembly procedure by a degree of “moistening”. This acts to secure the filaments by a combination of hydrogen bonding between these filaments possibly combined with light mechanical filament cohesion by surface tension forces imparted by the presence of this added moisture. Such a moistening procedure enhances the quality of the nonwoven composites produced by hydroentangling by retaining the shape and geometry of the filament assemblies.
  • any polymer filament system which can be rendered hydrophilic can be considered applicable for production of these three-dimensional stabilized filament assemblies, either alone or with other polymers to form blended filament assemblies
  • the preferred polymer is cellulose acetate which achieves outstanding fluid take up and wicking properties.
  • Staple cellulose acetate fibre has been used in non-woven fabrics in the past and reported in literature by Celanese Acetate LLC and other sources such as Kimberly-Clark but such non-woven materials have been conventional web-like structures.
  • Solvent spun rayons as described in the literature by Acordis plc and Lenzing AG are also a favoured option since such materials exhibit excellent fluid handling properties particularly in fully stabilized three-dimensional tow formats
  • the fluid management performance of filament assemblies produced in accordance with the invention can be optimised by the careful selection of filament diameters and packing density. Mixtures of coarser and finer filaments may be advantageous since filament spacing and the presence of capillaries are required for optimum fluid management.
  • the use, in the assemblies of filaments which have a “Y” shaped or “stellar” shaped cross-section or the like may be advantageous since the crevices running along such shaped filaments act like fine capillary structures thus enhancing fluid wicking and full utilisation of the composite structures.
  • a preferred nonwoven material for use in the outer layers of such composites surrounding the fully stabilized filament assemblies is solvent spun cellulose.
  • Such cellulose exhibits excellent hydroentangling properties yielding strong composites with excellent tactile and absorbency properties, essential in medical applications such as swabbing or laparotomy.
  • Such hydroentangled structures also exhibit excellent fibre retention (i.e. minimal loose fibres) in both wet and dry states, again vital in medical uses.
  • the stabilized filament assemblies can be cut by heat, ultrasonic or laser technologies prior to their deposition onto a carrier nonwoven web to produce nonwoven composites. These forms of cutting prevent filament loss which is highly undesirable in many end use applications, such as medical swabs and the like.
  • All the nonwoven structures described can be laminated to suitable backing sheets either during manufacture or as an after process to provide for extra security in use by preventing fluid leakage through the thickness of the absorbent composites.
  • suitable backing sheets include polymeric films, preferably those having water vapour permeability to optimise skin wellness in use.
  • Preferred backing sheets such as, for example, those made from cellulose or cellulose acetate exhibit environmentally responsible disposability.
  • the nonwoven composites disclosed in this current invention are suitable as a novel and innovative alternative to traditional gauze, as used in medical dressings, sponges, laparotomy sponges and bandages.
  • the composites are highly absorbent.
  • by correct material usage in the outer nonwoven component or components they can possess a non-adherent surface for single sided or double sided dressings, respectively.
  • Because of the high absorbency of these composites there is no need for folding or use in multiple plies as is the case with all woven and nonwoven sponges used to date. It is also possible to produce shaped sponges which are advantageous to the end-user and which are difficult to produce when folding is involved.
  • the composites described can possess chosen tactile properties dependent on the ingredients used. Furthermore, it is possible to reproduce the feel and three-dimensionality of conventional woven products. The texture, absorbency performance and appearance of the finished composites are dependent on the number, size, morphology and spacing of the filament assemblies incorporated into the composites coupled with the composition of the outer nonwoven layers surrounding these filament assemblies.
  • FIG. 1 is a sketch illustrating apparatus used for the three step production of a practical embodiment of newly formed fully stabilized three-dimensional filament assembly in accordance with the present invention
  • FIG. 2 is a sketch illustrating one type of apparatus for the production of composite material incorporating cut sections of the fully stabilized three-dimensional filament assembly resulting from the apparatus shown I FIG. 1;
  • FIG. 3 is a sketch illustrating a version of a completed composite article or product containing a cut section of the filament assembly resulting from the apparatus of FIG. 1, as produced, for example, by the apparatus of FIG. 2.
  • FIG. 1 illustrates a three step in-line consolidation procedure for the formation of a stabilized three dimensional multifilament assembly with substantially continuous capillarity from, in this case, cellulose acetate spun filaments.
  • Spun filaments ( 1 ) from a bale ( 2 ) of crimped filamentary tow as is commercially available are subjected to a longitudinal stretching process using textile drafting rollers ( 3 ) coupled with a degree of lateral stretching using bowed “Mount Hope” rollers ( 4 ).
  • Corrugation and compaction of these stretched filaments ( 5 ) is achieved using a stuffer box ( 6 ) with forced air injection ( 7 ).
  • the initially consolidated three-dimensional compacted filaments are then subjected to a very light and highly controlled specialist hydroentangling operation.
  • an extremely light, minimal water pressure preferably in the region of only 10-15 bars, is used in the hydroentangling operation.
  • Portions of two pairs of hydroentangling manifolds 8 are shown. Water jets issue from apertures in these manifolds 8 directed upwards and downwards onto the compacted filament assembly. This is sufficient to impart handling integrity to the resultant filament assembly ( 9 ) without interfering with the capillarity of said structure.
  • FIG. 2 illustrates a typical process whereby such formed fully stabilized filament assemblies 9 can be incorporated into finished absorbent nonwoven composites.
  • Fully stabilized filament assemblies ( 9 ) production of which was described in relation to FIG. 1, are positioned onto a prepared nonwoven fabric ( 12 ). Three such assemblies 9 are shown spaced apart transversely across the width of the apparatus and of the fabric 12 , with a margin at each transverse edge of the fabric 12 . The assemblies 9 are cut at intervals so as also to produce a longitudinal array of filament assembly sections 10 .
  • the fabric 12 is pre-moistened at a preliminary station 13 to facilitate positioning of the filament assemblies' sections 10 by drum-like apparatus 14 in a controlled manner and specifically to prevent movement of the assembly sections 10 on the base nonwoven material 12 .
  • a second nonwoven fabric 15 in this case identical to the base nonwoven material 12 is placed onto the assembly of fully stabilized filament assembly sections 10 and base nonwoven 12 .
  • the total structure thus formed is subjected to light but controlled hydroentangling by further pairs of hydroentangling manifolds 16 . This should be sufficient to hold the composite 17 securely together but insufficient to destroy the capillarity and three dimensionality of the fully stabilized filament assembly sections 10 .
  • Suitable hydroentangling pressures at this stage may be between 40 and 200 bars, optimally possibly between 50 and 100 bars.
  • the completed composite 17 is then subjected to drying, in this case using through-air technology in enclosure 18 .
US10/271,767 2000-04-18 2002-10-17 Non woven textile structure incorporating stabilized filament assemblies Abandoned US20030034115A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0303293A GB2394232A (en) 2002-10-17 2003-02-13 Non-woven material containing fully stabilized filament assemblies
PCT/GB2003/004293 WO2004035902A1 (fr) 2002-10-17 2003-10-03 Materiaux composites contenant des ensembles de filaments pleinement stabilises
AU2003271900A AU2003271900A1 (en) 2002-10-17 2003-10-03 Composite materials containing fully stabilized filament assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2000/001510 WO2000063479A1 (fr) 2000-04-18 2000-04-18 Structure textile non tissee comprenant des ensembles de filaments stabilises integres

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001510 Continuation-In-Part WO2000063479A1 (fr) 2000-04-18 2000-04-18 Structure textile non tissee comprenant des ensembles de filaments stabilises integres

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US10/271,767 Abandoned US20030034115A1 (en) 2000-04-18 2002-10-17 Non woven textile structure incorporating stabilized filament assemblies

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US (2) US6962042B2 (fr)
EP (1) EP1292729B1 (fr)
JP (1) JP2003518561A (fr)
CN (1) CN1254576C (fr)
AT (1) ATE271144T1 (fr)
AU (1) AU2000244194A1 (fr)
CA (1) CA2402204A1 (fr)
DE (1) DE60012235T2 (fr)
ES (1) ES2225307T3 (fr)
IL (2) IL152269A0 (fr)
MX (1) MXPA02010135A (fr)
PT (1) PT1292729E (fr)
WO (1) WO2000063479A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1524350A1 (fr) * 2003-10-17 2005-04-20 Reifenhäuser GmbH & Co. Maschinenfabrik Laminés à fibres et leurs procédés de fabrication
US20090036016A1 (en) * 2007-08-02 2009-02-05 Robertson Raymond M Nonwoven from bulked filament tow
US20090287131A1 (en) * 2006-11-14 2009-11-19 Neron Rene B Wound care product made from bulked filament tow
WO2013074609A1 (fr) * 2011-11-16 2013-05-23 Celanese Acetate Llc Couches de distribution d'acquisition produites à partir de rubans de câble continus et systèmes et procédés associés
US8623248B2 (en) 2011-11-16 2014-01-07 Celanese Acetate Llc Methods for producing nonwoven materials from continuous tow bands

Families Citing this family (12)

* Cited by examiner, † Cited by third party
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ATE271144T1 (de) 2004-07-15
EP1292729A1 (fr) 2003-03-19
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JP2003518561A (ja) 2003-06-10
CN1254576C (zh) 2006-05-03
PT1292729E (pt) 2004-11-30
US20030036329A1 (en) 2003-02-20
AU2000244194A1 (en) 2000-11-02
IL152269A0 (en) 2003-05-29
CN1452672A (zh) 2003-10-29
EP1292729B1 (fr) 2004-07-14
US6962042B2 (en) 2005-11-08
DE60012235T2 (de) 2005-05-25
CA2402204A1 (fr) 2000-10-26
ES2225307T3 (es) 2005-03-16
WO2000063479A1 (fr) 2000-10-26
DE60012235D1 (de) 2004-08-19
IL152269A (en) 2009-09-22

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