EP1226296B1 - Liaison de fibres - Google Patents

Liaison de fibres Download PDF

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Publication number
EP1226296B1
EP1226296B1 EP00959086A EP00959086A EP1226296B1 EP 1226296 B1 EP1226296 B1 EP 1226296B1 EP 00959086 A EP00959086 A EP 00959086A EP 00959086 A EP00959086 A EP 00959086A EP 1226296 B1 EP1226296 B1 EP 1226296B1
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EP
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Prior art keywords
fibers
fiber
nonwoven fabric
polymer
temperature
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EP00959086A
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German (de)
English (en)
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EP1226296A1 (fr
Inventor
Lars Fingal
Anders Stralin
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Essity Hygiene and Health AB
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SCA Hygiene Products AB
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/4334—Polyamides
    • 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
    • D04H1/44—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

Definitions

  • the invention relates to a method for bonding polymer fibers into a nonwoven fabric and a nonwoven fabric manufactured with the aid thereof.
  • the polymer fibers are subjected to hydroentangling, the fibers at the moment of hydroentangling being imparted a temperature exceeding the glass transition temperature of the polymer fiber and being less than the melting point of the polymer fiber.
  • thermobonding The manufacture of cloth and fabrics is very old art.
  • Such materials can be made of both synthetic fibers and natural fibers.
  • a number of methods utilize heat to melt the fibers together, so-called thermobonding.
  • Hydroentangling or spun-lacing is a technology which was introduced in the nineteen seventies.
  • the method involves the forming of a fiber web, either dry-laid or wet-laid, whereafter the fibers are entangled together with the aid of very fine jets of water under high pressure. Several rows of water jets are directed towards the fiber web, which is carried by a moving wire or drum. Finally, the entangled fiber web is dried.
  • fibers In hydroentangled materials many different types and mixtures of fibers are used, such as for example synthetic staple fibers, synthetic continuous fibers, staple fibers of regenerated cellulose and pulp fibers. Examples of commercially available fibers of regenerated cellulose are rayon, viscose fibers and lyocell.
  • Hydroentangling is a method of bonding fibers without using bonding agents or bonding fibers.
  • Hydroentangled material or spun-lace material of high quality can be made at reasonable cost, and has a high absorption capacity, good mechanical properties and a high textile comfort. They were used as wiping materials for house-hold or industrial use, as disposable materials in medical contexts and for hygiene etc.
  • the fibers to be entangled In order to form a composite web by hydroentangling, the fibers to be entangled must have the right properties for this purpose.
  • E the initial modulus of the fiber or the modulus of elasticity
  • I the moment of inertia.
  • the initial modulus is thus a material parameter, which is temperature-dependent.
  • a stiff fiber is more difficult to entangle and requires more specific energy (kWh/ton) to be bonded than a soft fiber, and this in turn limits the range of fibers which are technically and commercially of interest for use in this technology.
  • Fibers made of thermoplastic polymers such as e.g. polypropylene, polyester, polyamide commonly occur in hydroentangling.
  • thermoplastic and other synthetic fibers are dependent on the properties of the component of polymer or polymers and the type of process used. Often the properties of the polymer cannot be fully utilized. Rather, a compromise must be made due to the technical constraints of the process.
  • CA 841 938 describes the manufacture of a nonwoven fabric by hydroentangling, whereby water under high pressure is pressed through a perforated carrier against a sheet of a fiber suspension, to give rise to entangling of the fibers.
  • WO 95/06769 describes a method and an apparatus for achieving a melt bond and possibly entangling of fibers in a fiber fabric, e.g. a nonwoven fabric.
  • a steam jet or a jet of superheated steam is used to both melt and entangle the fibers. If one uses jets such as are normally used in hydroentangling, they must be sufficiently hot to melt a meltable component incorporated in the fiber web.
  • WO95/06769 thus describes a process whereby a certain amount of melting of the meltable component is always achieved.
  • This meltable component can either be the fibers themselves or an added meltable component in the form of a powder or granulate. No process for pure hydroentangling is described.
  • US 3 322 584 describes a melt-bonding process for bonding together two plastic webs.
  • the method described can also be used to bond together two layers of plastic fibers, but this also refers to a melt bond, the temperature used being sufficiently high to melt the fibers.
  • US 5 069 735 describes a method of edge-melting adjacent sheets or fabrics to solve the problem that these sheets normally flock and are unsuitable for use in operations for example.
  • US 3 192 560 describes a method for controlled melt-bonding of fiber threads with a suitable medium, e.g. steam or superheated steam, the temperature being kept about or slightly under the melting point of the fiber threads.
  • a suitable medium e.g. steam or superheated steam
  • One problem with hydroentangling is that the fiber components used must have a flexural rigidity such that the fibers can be entangled using reasonable energy levels. This means a limitation as regards the types of fibers used and means that thin fibers or fibers with a low initial modulus must be used, even if the fibers per se are not optimal for the formation of the fibrous web or for the functional properties of the finished material.
  • One purpose of the present invention is to achieve a process for manufacturing a nonwoven fabric by hydroentangling, where the flexural rigidity of the fiber components used does not limit the degree of entangling as much as previously.
  • An additional purpose of the present invention is to achieve a process making it possible to manufacture nonwoven fabrics having coarser fibers, consuming less energy or being stronger than what is possible with today's methods.
  • Another additional purpose of the present invention is to provide a nonwoven fabric with special properties, such as good mechanical properties, high bulk, etc.
  • the strength of the fiber can instead be fully optimized.
  • Fibers already well adapted to hydroentangling can be further optimized, providing improved material properties and/or lower energy consumption in the process.
  • a process is achieved for hydroentangling of polymer fibers for producing a nonwoven fabric.
  • the polymer fiber is imparted at the moment of hydroentangling, a temperature which is equal to or exceeds the glass transition temperature for the polymer fiber and is below the melting point for the polymer fiber.
  • hydroentangled fabric comprising polymer fibers, the polymer fibers in the fabric having an initial modulus ⁇ 50 cN/tex.
  • hydroentangled polymer fiber fabric is obtained with a bulk specific volume of ⁇ 8 cm 3 /g.
  • the polymer fiber is heated so that at the moment of entanglement it reaches a temperature above the glass transition temperature (Tg) of the polymer fiber.
  • Tg glass transition temperature
  • polymer fibers can be used.
  • a nonwoven fabric which completely or partially comprises synthetic polymer fibers, or mixtures or copolymers of such polymer fibers. Based primarily on the purpose of the nonwoven fabric, the type of fiber and the percentage of natural fiber are selected. The greater the percentage of synthetic polymers included in the nonwoven fabric, the greater are the possibilities.
  • fibers which can be used in the material according to the present invention are synthetic staple fibers, synthetic continuous fibers, staple fibers of regenerated cellulose, natural fibers such as plant fibers, pulp fibers or mixtures thereof.
  • synthetic fibers are fibers of polyester, polylactic acid , polyamide, polypropylene, polybutylene terephthalat (PBT), polyethylene (PE), polyethylene terephthalat (PET) and copolymers thereof, such as polyesteramides.
  • Bicomponent fibers i.e. fibers having a core of a first polymer, e.g.
  • the synthetic polymer fibers can comprise both polymer fibers made of natural fibers and polymer fibers made of synthetic fibers. Even continuous filaments, such as melt-blown and spun-bond fibers can be used as well as profiled so-called capillary fibers. These profiled fibers are often very stiff and nor-mally difficult to handle, but can be entangled with the aid of the present invention. Even mixtures of these different fibers can be used. A typical mixture is 40-50% long, synthetic fibers and the rest pulp, but all mixtures are applicable.
  • the pulp fibers can be of chemical, mechanical, thermomechanical, chemomechanical or chemothermomechanical pulp (CTMP). Mixing in of mechanical, thermomechanical, chemomechanical or chemothermomechanical pulp fibers provides a material with higher bulk and improved absorption and softness, which is described in SE 9500585-6.
  • thermoplastic, synthetic polymers and in particular semi-crystalline polymers can be used.
  • Amorphous polymers can also be used.
  • the heating of the polymer fiber at the moment of hydroentangling can be done in many different ways.
  • One method of achieving a momentary temperature rise in the process is to heat the entangling water to such a temperature that the fiber, at the moment of hydroentangling reaches a temperature above Tg.
  • this process is used when the Tg of the polymer lies below 100°C.
  • This process can also be used at Tg-temperatures above 100°C, but will then require special equipment to produce superheated steam.
  • a further method of heating the fiber can be by IR-heating, e.g. by IR-radiation of the fiber web, or alternatively of the entangling water.
  • microwave heating can be used or microwave heating.
  • metal wires e.g. of copper, which is heated up with the aid of hot air, hot water or another medium or a combination thereof.
  • the hydroentangling can be done starting from either a dry-laid or a wet-laid fiber web.
  • dry-forming the dry fibers are air-laid on a wire, whereafter the fiber web is subjected to hydroentangling.
  • wet-laying a wet- or foam-formed web is made by the fibers being dispersed in liquid or in a foam liquid containing a foam-forming tenside and water.
  • An example of a suitable foam-forming process of this type is described in SE 9402470-0.
  • the fiber dispersion can be dewatered on a wire and thereafter be hydroentangled.
  • the hydroentangling can be effected with conventional equipment.
  • Hydroentangling of a wet- or foam-formed fiber web can be done either in-line, i.e. directly when the fiber web has been dewatered on the wire, or on a wet-formed sheet which has been dried and rolled up after forming. Several such sheets can be laminated together by hydroentangling. It is also possible to combine dry-forming with wet- or foam-forming in such a way that an air-laid web of synthetic fibers, for example, is entangled together with a wet- or foam-formed paper sheet of pulp fibers.
  • the material is pressed and dried and rolled up.
  • the finished material can then be converted in a known manner to a suitable format and be packed.
  • a fiber dispersion is formed of the desired polymer fiber(s).
  • the fiber dispersion is formed on a rotating carrier, e.g. a wire, and when the dispersion has been formed it is subjected to hydro-entangling by water jets striking against the layer of the fiber dispersion and in this manner entangling the fibers.
  • the polymer fiber is imparted a temperature exceeding Tg for the polymer fiber, but at the same time being less than its melting point. This is done by heating the water used to produce the hydroentangling, at least during the hydroentangling itself, to a temperature above Tg for the polymer fiber by one of the above ways.
  • Typical energy levels used are 300 - 600 kWh/ton with a water pressure of 80 - 120 bar.
  • the present invention is used for polymer fibers with a Tg ⁇ 20°C, especially 20 - 100°C, suitably 50 - 100°C and more particularly 50 - 70°C.
  • Tg is preferably below 150°C.
  • a particularly preferred polymer fiber is polylactic acid (PLA), which has a Tg of 50 - 70°C.
  • the reported glass transition temperature for a polymer can vary widely, on one hand due to the fact that glass transition occurs over a temperature interval and not at a certain temperature, and on the other hand depending on what method is used to determine the glass transition temperature.
  • DSC Different Scanning Calorimetry
  • DMA Dynamic Mechanical Analysis
  • the storage modulus, the loss modulus and tan ⁇ are measured at a frequency (normally 1 Hz) as a function of temperature.
  • the storage module for an amorphous polymer changes by several orders often, while the loss module and tan ⁇ go through maximums.
  • Tg can be taken from "Polymer Handbook" by J. Brandrup and E.H. Immergut, publisher “Interscience Publishers”. Tg can also be derived with the aid of one of the methods DSC or DMA.
  • the method according to the invention is particularly suited to fibers with high flexural rigidity.
  • High flexural rigidity can be achieved either by a high initial modulus value or by high fiber thickness.
  • polymer fibers especially suitable are either fibers with a high initial modulus or very thick polymer fibers, for example a thin fiber with a high initial modulus or a thick fiber with a less pronounced or low initial modulus.
  • fibers which are both thick and have a high initial modulus can be used.
  • the initial modulus for a polymer fiber is expressed in cN/tex.
  • Measurement of the initial modulus value for a fiber can for example be done by measuring the initial slope of a stress-strain diagram from a tensile test performed according to SS-EN ISO 5079.
  • One example of the equipment, which can be used to measure the initial modulus according to the present invention is a Lenzing Vibrodyn. With the aid of DMA it is also possible to get an idea of how much the modulus changes at the glass transition temperature.
  • the initial modulus value for the polymer fiber is, in accordance with the present invention, the initial modulus value for the fiber at room temperature (see SS-EN ISO 5079).
  • Fibers of all thicknesses can be used, i.e. both microfibers, fibers of normal thickness about 1-2 dtex, and thick fibers about 6-7 dtex. According to a special embodiment, very thick fibers can be entangled to form a fiber fabric with high bulk.
  • new materials are also achieved, i.e. new nonwoven fabrics produced by hydroentangling.
  • the polymer fiber has an initial modulus value ⁇ 20 cN/tex, especially ⁇ 50 cN/tex and most preferably ⁇ 100 cN/tex. It is also possible to achieve nonwoven fabrics of polymers with very high initial modulus values, such as 100-2000 cN/tex, especially 500-1500 cN/tex, more particularly 200-750 cN/tex, and even more particularly 250-600 cN/tex.
  • the process according to the invention can be used to produce very strong nonwoven fabrics of fibers with very high initial modulus values, e.g. aromatic polyamides and aromatic polyesters.
  • nonwoven fabrics having a high bulk With the aid of the present method, nonwoven fabrics having very thick fibers, e.g. 6-7 dtex, and which provide a nonwoven fabric with very high bulk specific volume, can be manufactured.
  • Thick fibers generally refer to fibers ⁇ 5 dtex, but with the aid of such fibers a material with very high bulk specific volume ⁇ 8 cm 3 /g can be achieved in accordance with the present invention. Bulk is expressed as thickness divided by surface weight of the material (cm 3 /g).
  • nonwoven fabrics with a bulk specific volume of 5-15 cm 3 /g, especially 8-15 cm 3 /g and more particularly 10-15 cm 3 /g.
  • Nonwoven fabric manufactured with the aid of the present invention is a nonwoven fabric with a very high bulk of 10-50 cm 3 /g, a product, which has very good resilience. 25-50 ⁇ m fibers are used in this case. Such fibers, due to their stiffness, are very difficult to entangle by other methods. Such a material is particularly usable as a wicking layer in diapers, but it can be used in a number of different areas, where high bulk and good resilience are desirable properties, such as wipes.
  • the nonwoven fabric produced by being less dependent on the stiffness of the fiber, can provide a nonwoven fabric consisting substantially 100% of the polymer fiber or the fiber mixture, i.e. a fiber to which no softeners or other additives need to be added as might be required to handle a stiff fiber, for example.
  • the present method for manufacturing nonwoven fabrics is thus less dependent than previous methods on the flexural rigidity of the fiber and, as is evident from the above, provide various possibilities to exploit the potential created.
  • New materials with new properties can be made.
  • a fiber can be optimally stretched before hydroentangling so that it is as stiff as possible, and be entangled.
  • suitable fibers of this type are polyester fibers and polypropylene fibers. By stretching, the breaking strength of these fibers can be increased to impart new properties to the fiber and the nonwoven fabric produced therefrom and with the aid of the present method, such a fiber can be hydroentangled.
  • a fiber pretreated in this manner is often impossible to hydroentangle by today's methods.
  • fibers having greater stiffness and/or greater thickness than what is normally used in hydroentangling can be entangled to a high degree of entanglement at reasonable energy levels.
  • fibers of normal stiffness and thickness for hydroentangling can be entangled at lower energy levels and/or to a higher degree of entanglement.
  • the method allows nonwoven fabrics containing very thick fibers to be easily entangled and thus achieve a material of high bulk and good resilience.
  • An additional advantage is that material can be manufactured at lower cost since the manufacturing cost of synthetic fibers is dimension-related, decreasing with increasing fiber thickness.
  • An additional advantage is that fibers of very high strength can be entangled into a nonwoven fabric with very good mechanical properties, primarily high wet strength, without the high flexural rigidity of these fibers negatively affecting the degree of entanglement or the energy consumption.
  • the present invention creates a potential, not only by expanding the number of potential types of fibers as regards polymers and dimensions, but also by making it possible to optimize the fiber components used based on other criteria than limiting the flexural rigidity of the fiber.
  • This potential can be used for improved material properties (increased bulk, resilience, tensile strength, etc.) or reduced costs in the form of lower energy consumption and/or lower cost for the components used.
  • the nonwoven fabric can comprise various mixtures of fibers, including mixtures of non-synthetic fibers.
  • the nonwoven fabric will, of course, also have many different properties, depending on the degree of admixture and the type of fiber. On the whole, the present invention provides greater possibilities for optimizing and using new materials.
  • the nonwoven fabric made according to the present invention can be used as i.a. wiping material for household use or for industrial use, such as major consumers including shops, industries, hospitals, etc. It can also be used for disposable hospital articles, e.g. operation coats, sheets and the like. It can also be used for hygienic purposes, e.g. as components in absorbent products such as sanitary napkins, panty liners, diapers, incontinence products, bed protectors, surgical dressings, compresses and the like. This is particularly true of nonwoven fabrics made according to the present invention with high wet strength. Nonwoven fabrics of high bulk specific volume are particularly advantageous for use as wicking layers in diapers but also as wiping materials for household use.
  • Example 1 It is evident from Example 1 below that the tenside strength of the fiber (PLA-fiber) has increased by 20-25% by virtue of the fact that the Tg-temperature was exceeded at hydroentangling. This provides a potential of 20-25%, which can be used in various manners. As can be seen in Example 1, a stronger material can be obtained, but the potential can also be used to provide energy savings and thus savings in costs.
  • a foam-formed fiber dispersion consisting of 60% pulp fiber of chemical sulphate pulp and 40% thermoplastic synthetic fiber (1.7 dtex, 19 mm) was formed on a rotating wire.
  • the fiber dispersion was hydroentangled from one side at an ener-gy input of 300 kWh/ton.
  • hydroentangling was performed both with water at room temperature (20°C) and with water heated to 75°C.
  • Tg was measured with the aid of a Perkin Elmer DSC 7 and the measurement was done from room temperature to 50°C over the melting point.
  • the values of initial modulus were obtained in the following manner.
  • the tensile test was performed on a Lenzing Vibrodyn with a pulling speed of 50 mm/min. and a gauge length of 10 mm. A weight of 100 mg was used to pretension the fiber.
  • the initial modulus was calculated manually by drawing in the tangent to the tensile testing curves in the linear range. The values of the initial modulus given in the table are at room temperature.
  • the fibers In the dry state, the fibers have a relatively high friction against each other and the dry strength of the nonwoven fabric largely depends on the mechanical properties of the individual fibers, such as tenacity, elongation and initial modulus.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Glass Compositions (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Claims (17)

  1. Procédé d'hydroenchevêtrement de fibres de polymère pour fabriquer un tissu non tissé, caractérisé en ce que la fibre de polymère, au moment de l'hydroenchevêtrement, est amenée à une température supérieure ou égale à la température de transition vitreuse (Tv) de la fibre de polymère et inférieure au point de fusion de la fibre de polymère.
  2. Procédé selon la revendication 1, caractérisé en ce que la fibre de polymère possède un module initial ≥ 50 cN/tex, à la température ambiante.
  3. Procédé selon la revendication 1, caractérisé en ce que la fibre de polymère possède un module initial ≥ 100 cN/tex, à la température ambiante.
  4. Procédé selon la revendication 3, caractérisé en ce que la fibre de polymère possède un module initial de 100 - 2 000 cN/tex, en particulier de 500 - 1 500 cN/tex, mieux encore de 200 - 750 cN/tex, et tout particulièrement de 250 - 600 cN/tex, à la température ambiante.
  5. Procédé selon l'une quelconque des revendications 1 - 4, caractérisé en ce que la température est atteinte au moyen d'eau chaude ou surchauffée.
  6. Procédé selon l'une quelconque des revendications 1 - 4, caractérisé en ce que la température est atteinte au moyen d'un chauffage à IR.
  7. Procédé selon l'une quelconque des revendications 1 - 4, caractérisé en ce que la température est atteinte au moyen de micro-ondes.
  8. Procédé selon l'une quelconque des revendications 1 - 7, caractérisé en ce que la fibre de polymère possède une température de transition vitreuse (Tv) ≥ 20°C.
  9. Procédé selon l'une quelconque des revendications 1 - 8, caractérisé en ce que la fibre de polymère possède une température de transition vitreuse (Tv) de 20 - 100°C, en particulier de 50 - 70°C.
  10. Procédé selon l'une quelconque des revendications 1 - 9, caractérisé en ce que le polymère contenu dans les fibres de polymère comprend un polyester, un poly(acide lactique), un polyamide ou un polypropylène, ou des copolymères ou mélanges de ceux-ci.
  11. Tissu non tissé hydroenchevêtré susceptible d'être obtenu par le procédé selon l'une quelconque des revendications 1 - 10 comprenant des fibres de polymère, caractérisé en ce que les fibres de polymère dans le tissu non tissé ont une température de transition vitreuse (Tv) de 20 - 100°C et un module initial de 200 - 750 cN/tex à la température ambiante.
  12. Tissu non tissé selon la revendication 11, caractérisé en ce que les fibres de polymère dans le tissu non tissé ont un module initial de 250 - 600 cN/tex à la température ambiante.
  13. Tissu non tissé selon l'une quelconque des revendications 11 - 12, caractérisé en ce que les fibres de polymère dans le tissu non tissé possèdent une température de transition vitreuse (Tv) de 50 - 70°C.
  14. Tissu non tissé selon l'une quelconque des revendications 11 - 13, caractérisé en ce que le tissu non tissé possède un volume massique apparent ≥ 8 cm3/g.
  15. Tissu non tissé selon la revendication 14, caractérisé en ce que le tissu non tissé possède un volume massique apparent de 8 - 15 cm3/g, en particulier de 10 - 15 cm3/g.
  16. Tissu non tissé selon l'une quelconque des revendications 11 - 15, caractérisé en ce que le polymère incorporé dans les fibres de polymère comprend un polyester, un poly(acide lactique), un polyamide ou un polypropylène, ou des copolymères ou mélanges de ceux-ci.
  17. Tissu non tissé selon l'une quelconque des revendications 10 - 15, caractérisé en ce que le polymère incorporé dans les fibres de polymère comprend un polyester, un poly(acide lactique), un polyamide ou un polypropylène, ou des copolymères ou mélanges de ceux-ci.
EP00959086A 1999-09-01 2000-08-31 Liaison de fibres Expired - Lifetime EP1226296B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9903075 1999-09-01
SE9903075A SE518438C2 (sv) 1999-09-01 1999-09-01 Förfarande för hydroentangling av polymerfibrer och hydroentanglat tyg innefattande polymerfibrer
PCT/SE2000/001670 WO2001016417A1 (fr) 1999-09-01 2000-08-31 Liaison de fibres

Publications (2)

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EP1226296A1 EP1226296A1 (fr) 2002-07-31
EP1226296B1 true EP1226296B1 (fr) 2003-05-21

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EP00959086A Expired - Lifetime EP1226296B1 (fr) 1999-09-01 2000-08-31 Liaison de fibres

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EP (1) EP1226296B1 (fr)
JP (1) JP2003508640A (fr)
AT (1) ATE241027T1 (fr)
AU (1) AU7046900A (fr)
BR (1) BR0013628A (fr)
DE (1) DE60002910D1 (fr)
HU (1) HUP0202760A2 (fr)
PL (1) PL353736A1 (fr)
SE (1) SE518438C2 (fr)
TW (1) TW522188B (fr)
WO (1) WO2001016417A1 (fr)
ZA (1) ZA200201194B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7779521B2 (en) 2006-12-22 2010-08-24 Kimberly-Clark Worldwide, Inc. Hydroentangled nonwoven fabrics, process, products and apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5037964B2 (ja) * 2007-02-13 2012-10-03 Ｅｓファイバービジョンズ株式会社 湿式不織布用繊維
JP6458614B2 (ja) * 2015-04-13 2019-01-30 王子ホールディングス株式会社 生分解性工業用紙

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485706A (en) * 1968-01-18 1969-12-23 Du Pont Textile-like patterned nonwoven fabrics and their production
US5286553A (en) * 1988-12-15 1994-02-15 Asahi Kasei Kogyo Kabushiki Kaisha Composite sheet for fibrous reinforcing material
DE4013946A1 (de) * 1990-04-30 1991-10-31 Hoechst Ag Verwirbeltes multifilamentgarn aus hochmodul-einzelfilamenten und verfahren zum herstellen eines solchen garnes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7779521B2 (en) 2006-12-22 2010-08-24 Kimberly-Clark Worldwide, Inc. Hydroentangled nonwoven fabrics, process, products and apparatus

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HUP0202760A2 (en) 2008-01-28
ATE241027T1 (de) 2003-06-15
DE60002910D1 (de) 2003-06-26
ZA200201194B (en) 2003-04-30
AU7046900A (en) 2001-03-26
EP1226296A1 (fr) 2002-07-31
SE9903075L (sv) 2001-03-02
PL353736A1 (en) 2003-12-01
BR0013628A (pt) 2002-05-14
TW522188B (en) 2003-03-01
SE518438C2 (sv) 2002-10-08
SE9903075D0 (sv) 1999-09-01
WO2001016417A1 (fr) 2001-03-08
JP2003508640A (ja) 2003-03-04

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