EP1448824B1 - Toile non tissee et procede de fabrication - Google Patents

Toile non tissee et procede de fabrication Download PDF

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Publication number
EP1448824B1
EP1448824B1 EP02802858A EP02802858A EP1448824B1 EP 1448824 B1 EP1448824 B1 EP 1448824B1 EP 02802858 A EP02802858 A EP 02802858A EP 02802858 A EP02802858 A EP 02802858A EP 1448824 B1 EP1448824 B1 EP 1448824B1
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EP
European Patent Office
Prior art keywords
fibers
fabric
binder
elastomeric
fiber
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Expired - Fee Related
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EP02802858A
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German (de)
English (en)
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EP1448824A1 (fr
Inventor
Kazuhiko Terada
Yoshio Kagiya
Yoshiya Makita
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Du Pont Toray Co Ltd
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Du Pont Toray Co Ltd
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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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/4358—Polyurethanes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres

Definitions

  • the present invention relates to stretch nonwoven fabrics, more particularly such fabrics comprising elastomeric fibers, a binder (especially binder fibers), and crimped fibers.
  • Nonwoven fabrics have been disclosed that contain elastomeric polyurethane and polyetherester fibers, for example United States Patent US 5238534 and Published Japanese Patent Applications JP 43-026578, JP03-019952, and JP10-025621. However, such fabrics can be unattractively heavy and can have poor, tacky hand. Nonwoven fabrics have also been disclosed that contain crimped fibers, for example United States Patent US5102724 and Published Japanese Patent Applications JP02-091217 and JP05-171555, but they can have poor, and anisotropic, stretch and recovery properties. Both these types of deficiencies can make the nonwovens of the prior art unsatisfactory for direct contact with skin, for example in diapers.
  • Cross-laid carded webs have been used to make machine- and cross-direction properties similar, for example as disclosed in International Patent Application WO00/63478 and in Published Japanese Patent Applications JP08-260313 and JP11-061617, but such operations add cost, and the fabrics can be thick and can have poor hand, low flexibility, and/or poor stretch and recovery properties.
  • Laminates of nonwoven webs and elastomeric materials have also been disclosed, for example in Published Japanese Patent Application JP08-188950, but such fabrics, again, can be unevenly thick and of low flexibility so that they do not satisfactorily hug parts of the body.
  • Nonwovens comprising binder fibers have also been disclosed, for example in United States Patent US5302443 and Published Japanese Patent Application JP2000-328416, but such fabrics typically lack adequate stretch-and-recovery properties.
  • the present invention provides a nonwoven fabric having isotropic recovery from extension of at least about 55% and comprising a binder, about 3 to 50 weight percent bare elastomeric staple fibers based on weight of the fabric, and crimped staple bicomponent fibers.
  • the invention also provides a method of manufacturing such a nonwoven fabric comprising the steps of (a) providing staple spandex, staple latent crimp fibers which develop crimp when heated, and binder fibers; (b) preparing a suspension of the spandex, the latent crimp fibers and the binder fibers; (c) forming the suspension into a web by a process selected from the group consisting of air-laid and wet-laid; (d) heating the web to melt the binder fibers and bond the fibers; and (e) heating the web in a relaxed state to develop crimp in the latent crimp fibers.
  • nonwoven fabrics comprising a binder, crimped staple fibers, and bare elastomeric staple fibers have an unusual combination of good hand as indicated by lack of tackiness, good recovery from extension after repeated stretching even at low elastomeric fiber content, and low basis weight and thickness. They are also flexible and have isotropic mechanical properties.
  • the fabrics are well-suited to articles having stretch properties, such as apparel interlinings, diapers, substrates for external medications, wiping cloths, and packaging materials.
  • elastomeric fiber means a bare (uncovered) staple fiber which, free of diluents, has a break elongation in excess of 100% independent of any crimp and which when stretched to twice its length, held for one minute, and then released, retracts to less than 1.5 times its original length within one minute of being released.
  • Such fibers include, but are not limited to, rubber fiber, spandex, polyetherester fiber, biconstituent fiber, and elastoester.
  • spandex means a manufactured fiber in which the fiber-forming substance is a long chain synthetic polymer comprised of at least 85% by weight of a segmented polyurethane.
  • “Isotropic mechanical properties” means that properties, such as tensile strength and recovery from extension, in the cross-direction of the fabric are at least 80% of those in the machine-direction of the fabric.
  • “Biconstituent fiber” means a manufactured fiber having one component of a first general class of polymer, for example a thermoplastic elastomer, and a second component of a second general class of polymer, for example a thermoplastic non-elastomer, both components being substantially continuous along the length of the fiber; the fiber can have a concentric or eccentric sheath-core or side-by-side construction.
  • “Bicomponent fiber” means a fiber in which two polymers of the same general class are in a side-by-side or eccentric sheath-core relationship and includes both crimped fibers and fibers with latent crimp that has not yet been realized.
  • nonwoven stretch fabric 10 of the invention is schematically illustrated.
  • the detail in Figure 1 B reveals that the fabric comprises elastomeric fibers 12, crimped fibers 14, and a binder 16 which bonds elastomeric fibers 12 to crimped fibers 14, for example at points of contact 18 therebetween so that the stretch and recovery properties of the elastomeric and the crimped fibers are not impaired.
  • FIGS. 2A and 2B cross-sections of one embodiment of the nonwoven stretch fabric of the invention are shown schematically to comprise elastomeric fibers 12, crimped fibers 14, and a binder 16 .
  • Crimped fibers 14 are shown as side-by-side bicomponent fibers comprising components 14x and 14y.
  • Binder 16 is shown as a sheath-core binder fiber comprising sheath 16x and core 16y.
  • the nonwoven fabric of the invention comprises about 3 to 50 weight percent, preferably about 5 to 30 weight percent, bare elastomeric staple fibers, based on the weight of the fabric.
  • amount of elastomeric fiber is less than about 3 weight percent, the ability of the fabric to recover from extension can be unsatisfactory, and when the amount of elastomeric fibers is more than about 50 weight percent, the elastomeric nonwoven fabric can have an unpleasant, sticky hand.
  • the fabric preferably further comprises about 40 to 80 weight percent crimped staple fibers, more preferably about 50 to 70 weight percent, based on the weight of the fabric. At an amount less than about 40 weight percent, the nonwoven fabric can have decreased stretch properties, poor flexibility, and a hard hand. At an amount greater than about 80 weight percent, the fabric can have poor mechanical strength and thus a diminished ability to recover from extension when repeatedly stretched.
  • the fabric preferably also comprises about 10 to 50 weight percent of a binder, more preferably about 20 to 40 weight percent, based on the weight of the fabric. At an amount less than about 10 weight percent, the fabric can have poor mechanical strength, and at more than about 50 weight percent, the stretch properties can be compromised, and the fabric can have an unacceptably hard hand.
  • the fabric of the invention has a recovery from extension of at least about 55% and can have a thickness of at least about 50 microns and less than 135 microns.
  • elastomeric fibers examples include spandex, polyetherester elastomeric fibers, and polyetheramide elastomeric fibers. Natural rubber, synthetic rubber, and semi-synthetic rubber can also be used, as can biconstituent fibers. Spandex is preferred, and spandex comprising polyurethaneurea is more preferred. Polyurethaneureas can typically be prepared from a polymeric glycol, a diisocyanate, and a diamine or alcoholamine chain extender.
  • the linear density of the staple elastomeric fibers can be about 0.5 to 40 decitex, typically about 1 to 30 decitex. At less than about 0.5 decitex, the fibers can have too low mechanical strength, and at more than about 40 decitex, the number of elastomeric fibers making up the web per unit surface area is reduced; outside of such a range, the fabric can have a reduced recovery from extension.
  • the staple elastomeric fibers can have a length of about 3 to 50 mm, typically about 5 to 30 mm. At a length of less than about 3 mm, the fabric can have low mechanical strength, and at a length greater than about 50 mm, it can be difficult to achieve a uniform distribution of the fibers in the fabric web. No particular limitation is imposed on the cross-sectional shape of the elastomeric fibers, which can have a round cross-section as shown in Figure 2 or a modified cross-section, for example triangular or flattened.
  • Useful crimped staple fibers can be polyester fibers, polyolefin fibers, acrylic fibers, and polyamide fibers. Crimp can be developed in such fibers from the corresponding latent crimp fibers by heat treatment under relaxed conditions after the elastomeric fibers, latent crimp fibers, and binder have been mixed, and preferably after a web has been formed therefrom.
  • the latent crimp and corresponding crimped fibers have a bicomponent construction, in which useful polymer pairs include polyethylene terephthalate and poly(ethylene terephthalate-co-isophthalate); poly(ethylene terephthalate) and poly(trimethylene terephthalate); poly(ethylene terephthalate-co-isophthalate) and poly(trimethylene terepthalate); poly(ethylene terephthalate) and poly(tetramethylene terephthalate); poly(hexamethylene adipamide) and poly(hexamethylene-co-2-methyl-1,5-diaminopentamethylene adipamide); and the like.
  • the latent crimp fibers can have a crimp development temperature which is lower than the softening temperature of the elastomeric fibers. If the crimp development temperature of the latent crimp fibers is higher than the softening temperature of the elastomeric fibers, the ability of the elastomeric fibers to recover from extension can be compromised during crimp development.
  • the crimped fibers can have a linear density of about 0.2 to 20 decitex per filament, typically about 0.5 to 10 decitex per filament. If the crimped fibers have a linear density of less than about 0.2 decitex per filament, the stretch properties of the fabric can be inadequate. At a linear density of more than about 20 decitex per filament, the fabric can be stiff and have a poor hand. As with the elastomeric fibers, the crimped fibers can have a length of about 3 to 50 mm, typically about 5 to 30 mm. No particular limitation is imposed on the cross-section of the crimped fibers, and they can have a round cross-section as shown in Figure 2, or a triangular, flattened, or a 'snowman' cross-section.
  • the binder can be a thermoplastic resin such as polyester, polyolefin, acrylic or polyamide. When heated and melted, then cooled and solidified, it bonds the fibers of the web (precursor to the fabric of the invention) together.
  • the melting temperature of the binder can be lower than the softening temperature of the elastomeric fibers so that the ability of the elastomeric fibers to recover from extension is not compromised when the precursor web is heated to melt the binder.
  • the shape of the binder can be a liquid, a powder, or a fiber as shown in Figure 1 and 2.
  • a fiber shape is preferred, for example having a concentric or eccentric sheath-core construction in which the thermoplastic sheath melts at a lower temperature than the core.
  • the binder fibers can have a length of about 3 to 50 mm, typically about 5 to 30 mm.
  • the polymers of which the fibers are comprised can be copolymers, comprising additional monomers that improve their preparation, functionality, or processing, for example for improved dyeability (for example 5-sodium-sulfoisophthalate in polyesters), optimized crimp levels, melt viscosity, adhesion, resistance to environmental degradation, and the like, provided the benefits of the invention are not compromised.
  • the fibers can contain additives such as ultraviolet light absorbers, antioxidants, anti-tack agents, lubricants, hindered phenolic stabilizers, hindered amine stabilizers, inorganic pigments such as titanium oxide, zinc oxide, carbon black and the like, antimicrobial agents containing silver, zinc, or compounds thereof, deodorants, fragrances, and anti-static agents such as poly(ethylene oxide), as long as the benefits of the invention are not adversely affected.
  • additives such as ultraviolet light absorbers, antioxidants, anti-tack agents, lubricants, hindered phenolic stabilizers, hindered amine stabilizers, inorganic pigments such as titanium oxide, zinc oxide, carbon black and the like, antimicrobial agents containing silver, zinc, or compounds thereof, deodorants, fragrances, and anti-static agents such as poly(ethylene oxide), as long as the benefits of the invention are not adversely affected.
  • a suspension of staple elastomeric fibers (preferably spandex), staple latent crimp fibers, and a binder (preferably binder fibers) is prepared.
  • a dispersing agent and/or a thickener can be added to the suspension.
  • the suspension is formed into a web by a wet-lay method or an air-lay method, and the web is heated to melt the binder and to crimp the latent crimp fibers.
  • the heating step is preferably carried out with little or no pressure or tension (that is, with the web in a relaxed state) so that the latent crimp fibers are not prevented from crimping, and at a temperature lower than the softening temperature of the elastomeric fibers.
  • the heating step can be carried out in two steps, one for bonding the fibers and one for developing crimp in the latent crimp fibers, or it can be carried out in a single step to accomplish both bonding and crimping.
  • the elastomeric fibers, the latent crimp fibers, and the binder fiber can be added to water and mixed in a rotary device 20 such as a pulper to disaggregate the fibers and make a suspension of fibers in the water so that the suspension has a fiber concentration of about 0.1 to 3 wt%.
  • the suspension can be delivered by pumps (“P") to mixing tank 22 and then to machine tank 24.
  • a dispersing agent for example a nonionic polyether-based dispersing agent, a weakly cationic polyester/polyether dispersing agent, or the like, can be added for example in an amount of 0.01 to 10% by weight based on the total fiber weight.
  • a watersoluble thickener can also be added, for example in an amount of 5 to 50 ppm (thickener solids basis) based on the weight of the water.
  • the suspension from machine tank 24 can be fed by a pump (“P") to wire conveyor belt 26a of short-screen papermaking machine 26 and dewatered on wire conveyor belt 26a to form a web on the belt.
  • Figure 4A schematically illustrates one embodiment of the web, which comprises elastomeric fibers 12, latent crimp fibers 14, and binder fibers 16.
  • the web on wire conveyor belt 26a can then be transferred onto felt 28, which can have a smoother surface than wire conveyor belt 26a.
  • the web on felt 28 can be transferred onto cylinder-type dryer 30, which can have a smoother surface than felt 28, and where the web can be heated to a predetermined temperature sufficient to melt sheath 16x of binder fiber 16 within the web.
  • the web can then be pulled away from cylinder-type dryer 30 and cooled to solidify the melted binder so that fibers 12 and 14 are bonded together, for example at points 18 (see Figure 1B), and a nonwoven fabric is formed.
  • the fabric in a crimp development step (“D" in Figure 3), can be fed by feed rolls 31 to heating oven 32 which can supply heat for example as infrared or far-infrared radiation.
  • the temperature within heating oven 32 can be lower than the softening temperature of elastomeric fibers 12 but high enough to make fibers 14 develop crimp.
  • Figure 4B schematically illustrates one embodiment of the fabric at this step, in which the fibers are indicating according to the numbering system used for Figure 4A.
  • the fabric can be wound up on winder 36 ("E" in Figure 3).
  • the tanks which hold the suspension may instead consist of one tank, or three or more tanks.
  • the tanks which hold the suspension may instead consist of one tank, or three or more tanks.
  • the web-forming step instead of a short-screen papermaking machines, other types of papermaking machines may be used, such as a Fourdrinier machine or a cylinder machine.
  • other liquids such as ethanol may be used as the medium instead of water.
  • the length and number of felts which carry the web may be varied, or one or more rolls may be used instead of the felt.
  • a pressing step in which the web is squeezed under applied pressure may be separately provided between the web-forming step and the bonding step.
  • other types of heaters e.g., air dryer, air through-circulation dryer, infrared dryer, suction dryer
  • the bonding step and the crimp development step may be carried out at separate times or places, or these steps may be integrated so as to accomplish bonding and crimp development at the same time.
  • a step to adjust the hand or surface properties of the nonwoven stretch fabric by passing the fabric between calender rolls (optionally with an embossing surface) (not shown) can be provided between the crimp development step and the wind-up step.
  • an air-lay step can be employed instead of a wet-lay step.
  • the fibers can be disaggregated and dispersed with an opening machine (not shown) in the fiber suspension preparation step, and a mixed suspension of the fibers can be prepared with a fiber blending machine (not shown).
  • a random carding machine can be used to improve the randomness of the fiber orientations.
  • fabric properties were measured by the following methods.
  • Basis weight and thickness were measured in accordance with Japanese Industrial Standards test number JIS L-1096, and tensile strength was measured in accordance with JIS P-8113.
  • the recovery from extension was measured by determining the length of a test specimen before testing (L o ), subjecting the specimen to five 15% extension-and-recovery cycles on an Instron tester, determining the length of the specimen at the fifth extension (L e ), and after the fifth recovery (L f ).
  • the elastomeric fibers used were spandex (Lycra® T-127C, a registered trademark of DuPont-Toray Co., Ltd.) having a linear density of 7 decitex per filament, a fiber length of 6 mm, and a softening temperature of about 180°C.
  • the latent crimp fibers were poly(ethylene terephthalate) + poly(ethylene terephthalate) copolymer bicomponent fibers (T81, made by Unitika Fiber Co., Ltd.) having a linear density of 1.7 decitex per filament, a fiber length of 5 mm, and a crimp development temperature of at least about 140°C.
  • the binder was sheath-core binder fibers of poly(ethylene terephthalate) and poly(ethylene terephthalate-co-isophthalate) (30% isophthalate) ("Melty" 4080, manufactured by Unitika Fiber Co., Ltd.) having a linear density of 1.1 decitex per filament, a fiber length of 3 mm, and a sheath melting temperature of about 110°C.
  • the resulting suspension was wet-laid with a short-screen papermaking machine so that the fibers were substantially randomly oriented, then heated in a cylinder-type dryer having a surface temperature of 120°C to give a web having a basis weight of 22 g/m 2 .
  • the web was then passed in a relaxed state through an infrared heater set to 160°C to develop crimp in the latent crimp fiber.
  • the web was pressed with a cylindrical roll at a pressure of 10 kgf/cm, yielding the nonwoven fabric whose properties are shown in Table 1.
  • a nonwoven fabric was produced under the same conditions as in Example 1 except that the proportion of spandex was 10 wt % and the proportion of latent crimp polyester fibers was 60 wt %.
  • the properties of the resulting fabric are shown in Table 1.
  • a nonwoven fabric was produced under the same conditions as in Example 1 except that the proportion of spandex was 20 wt % and the proportion of latent crimp polyester fibers was 50 wt %.
  • the properties of the resulting fabric are shown in Table 1.
  • Example 1 Example 2
  • Example 3 Comp.
  • Example 1 Fiber proportions (wt %) Spandex 5 10 20 0
  • Crimped polyester bicomponent fibers 65 60
  • Polyester binder fibers 30
  • 30 Fabric properties Basis weight (g/m2) 42 40 38 44
  • Thickness (microns) 119 132 124 137
  • MD (kN/m) 1.1 1.0 0.9 1.1
  • Tensile strength CD (kN/m) 1.0 0.9 0.8 1.0 Recovery from extension

Claims (10)

  1. Tissu non tissé présentant une récupération isotrope à partir d'une extension d'au moins 55% et comprenant un liant, de 3 à 50 pour-cent en poids de fibres courtes élastomères nues sur la base du poids du tissu, et des fibres à deux composants courtes frisées comprenant des polymères en une relation choisie dans le groupe constitué de côte à côte et d'enveloppe-âme excentrique.
  2. Tissu suivant la revendication 1, comprenant de 5 à 30 pour-cent en poids de fibre élastomère nue, sur la base du poids du tissu.
  3. Tissu suivant la revendication 1, dans lequel les fibres frisées comprennent des paires de polymères choisies dans le groupe constitué:
    de poly(éthylène téréphtalate) et de poly(triméthylène téréphtalate), et
    de poly(éthylène téréphtalate) et de poly(éthylène téréphtalate-co-isophtalate),
       et dans lequel le liant est une fibre liante présente à 10 à 50 pour-cent en poids, sur la base du poids du tissu et avec une température de fusion inférieure à la température de ramollissement des fibres élastomères.
  4. Tissu suivant la revendication 1, dans lequel les fibres élastomères sont un spandex et les fibres frisées sont présentes à 40 à 80 pour-cent en poids, sur la base du poids du tissu.
  5. Tissu suivant la revendication 1, dans lequel les fibres élastomères nues sont un spandex de polyuréthane-urée et le tissu possède une épaisseur d'au moins 50 microns et inférieure à 135 microns.
  6. Tissu suivant la revendication 1, dans lequel les fibres élastomères présentent une densité linéaire de 0,5 à 40 décitex par filament, le liant est une fibre et les fibres élastomères, les fibres frisées et les fibres liantes possèdent une longueur de 3 à 50 mm.
  7. Procédé pour la fabrication du tissu non tissé suivant la revendication 1, comprenant les étapes:
    (a) de fourniture d'un spandex court, de fibres à frisure latente courtes qui développent une frisure lorsqu'elles sont chauffées, et de fibres liantes;
    (b) de préparation d'une suspension du spandex, des fibres à frisure latente et des fibres liantes;
    (c) de transformation de la suspension en une bande par un procédé choisi dans le groupe constitué de dépôt à l'air et de dépôt humide;
    (d) de chauffage de la bande pour fondre la fibre liante et lier les fibres; et
    (e) de chauffage de la bande dans un état relâché pour développer une frisure dans les fibres à frisure latente.
  8. Procédé suivant la revendication 7, dans lequel l'étape de préparation d'une suspension (b) est réalisée de sorte que les fibres à frisure latente sont présentes à un niveau correspondant à 40 à 80 pour-cent en poids sur la base du poids du tissu et les étapes de chauffage (d) et (e) sont réalisées sous forme d'une étape unique.
  9. Procédé suivant la revendication 7, dans lequel les étapes de chauffage (d) et (e) sont réalisées à des températures inférieures à la température de ramollissement du spandex.
  10. Article comprenant le tissu suivant la revendication 1, fabriqué par le procédé suivant la revendication 7 et choisi dans le groupe constitué de doublures intermédiaires d'habillement, de langes, de substrats pour des médications externes, d'étoffes d'essuyage et de matériaux d'emballage.
EP02802858A 2001-11-06 2002-11-05 Toile non tissee et procede de fabrication Expired - Fee Related EP1448824B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2001340946 2001-11-06
JP2001340946A JP3934916B2 (ja) 2001-11-06 2001-11-06 伸縮性不織布およびその製造方法
PCT/US2002/035496 WO2003040452A1 (fr) 2001-11-06 2002-11-05 Toile non tissee et procede de fabrication

Publications (2)

Publication Number Publication Date
EP1448824A1 EP1448824A1 (fr) 2004-08-25
EP1448824B1 true EP1448824B1 (fr) 2005-10-26

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EP02802858A Expired - Fee Related EP1448824B1 (fr) 2001-11-06 2002-11-05 Toile non tissee et procede de fabrication

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EP (1) EP1448824B1 (fr)
JP (1) JP3934916B2 (fr)
KR (1) KR100894599B1 (fr)
CN (1) CN100445450C (fr)
DE (1) DE60206957T2 (fr)
HK (1) HK1076132A1 (fr)
WO (1) WO2003040452A1 (fr)

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US8007474B2 (en) 2003-06-16 2011-08-30 Ethicon Endo-Surgery, Inc. Implantable medical device with reversible attachment mechanism and method
US11690767B2 (en) 2014-08-26 2023-07-04 Curt G. Joa, Inc. Apparatus and methods for securing elastic to a carrier web
US11701268B2 (en) 2018-01-29 2023-07-18 Curt G. Joa, Inc. Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product
US11744744B2 (en) 2019-09-05 2023-09-05 Curt G. Joa, Inc. Curved elastic with entrapment
US11925538B2 (en) 2019-01-07 2024-03-12 Curt G. Joa, Inc. Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product

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DE10338196A1 (de) * 2003-08-20 2005-05-12 Reifenhaeuser Masch Verfahren zur Herstellung eines Vliesstoffes
JP4683957B2 (ja) * 2005-02-25 2011-05-18 花王株式会社 不織布
JP4566142B2 (ja) * 2005-03-09 2010-10-20 花王株式会社 不織布
US7357985B2 (en) 2005-09-19 2008-04-15 E.I. Du Pont De Nemours And Company High crimp bicomponent fibers
JP2007152774A (ja) * 2005-12-06 2007-06-21 Hyuei-Ron Hyuan 成形エラストマー製造の方法および装置
AU2007279816B2 (en) 2006-08-04 2013-03-07 Kuraray Co., Ltd. Stretch nonwoven fabric and tapes
BRPI0717188B1 (pt) * 2006-12-08 2018-02-06 Uni-Charm Corporation Material não-tecido estirado, método de fabricação do material não-tecido estirado, método de fabricação da folha composta estirada e artigo absorvente
KR20130109134A (ko) * 2010-09-14 2013-10-07 사빅 이노베이티브 플라스틱스 아이피 비.브이. 강화된 열가소성 물품, 상기 물품의 제조를 위한 조성물, 제조 방법, 및 이로부터 형성된 물품
CN104540988B (zh) * 2012-08-08 2017-12-15 大和纺控股株式会社 无纺织物、用于吸收制品的片材和使用其的吸收制品
DE102013008402A1 (de) * 2013-05-16 2014-11-20 Irema-Filter Gmbh Faservlies und Verfahren zur Herstellung desselben
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8007474B2 (en) 2003-06-16 2011-08-30 Ethicon Endo-Surgery, Inc. Implantable medical device with reversible attachment mechanism and method
US11690767B2 (en) 2014-08-26 2023-07-04 Curt G. Joa, Inc. Apparatus and methods for securing elastic to a carrier web
US11701268B2 (en) 2018-01-29 2023-07-18 Curt G. Joa, Inc. Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product
US11925538B2 (en) 2019-01-07 2024-03-12 Curt G. Joa, Inc. Apparatus and method of manufacturing an elastic composite structure for an absorbent sanitary product
US11744744B2 (en) 2019-09-05 2023-09-05 Curt G. Joa, Inc. Curved elastic with entrapment

Also Published As

Publication number Publication date
CN100445450C (zh) 2008-12-24
DE60206957T2 (de) 2006-08-03
KR100894599B1 (ko) 2009-04-24
EP1448824A1 (fr) 2004-08-25
DE60206957D1 (de) 2005-12-01
HK1076132A1 (en) 2006-01-06
JP3934916B2 (ja) 2007-06-20
WO2003040452A1 (fr) 2003-05-15
JP2003147670A (ja) 2003-05-21
CN1599814A (zh) 2005-03-23
KR20050043743A (ko) 2005-05-11

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