EP2943607B1 - Nappage comprenant des fibres bi- ou multi-composants crêpées - Google Patents

Nappage comprenant des fibres bi- ou multi-composants crêpées Download PDF

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EP2943607B1
EP2943607B1 EP14705962.0A EP14705962A EP2943607B1 EP 2943607 B1 EP2943607 B1 EP 2943607B1 EP 14705962 A EP14705962 A EP 14705962A EP 2943607 B1 EP2943607 B1 EP 2943607B1
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Prior art keywords
fibres
fibre
batt
mpa
polymer
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German (de)
English (en)
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EP2943607A1 (fr
Inventor
Jaroslav KOHUT
Zdenek Mecl
Frantisek Klaska
Pavlina Kasparkova
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Pegas Nonwovens sro
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Pegas Nonwovens sro
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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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/018—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the shape
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • 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
    • 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
    • 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
    • D04H3/147—Composite yarns or filaments
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2509/00—Medical; Hygiene
    • D10B2509/02—Bandages, dressings or absorbent pads
    • D10B2509/026—Absorbent pads; Tampons; Laundry; Towels
    • 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
    • Y10T428/2922—Nonlinear [e.g., crimped, coiled, etc.]
    • Y10T428/2924—Composite
    • 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
    • Y10T442/627—Strand or fiber material is specified as non-linear [e.g., crimped, coiled, etc.]
    • Y10T442/629—Composite strand or fiber material

Definitions

  • the invention relates to a batt comprising crimped bi- or multicomponent fibres consisting of at least two materials, which comprise a polymer as a predominant component and which are arranged across the cross-section of the fiber in a way suitable to promote crimping of the fibre during the setting process and which predominant polymer components differ in the crystallisation heat (dHc).
  • the here-described batt type is intended especially for the production of nonwoven textiles that are to be used primarily for applications in the hygiene industry.
  • nonwoven textiles may be of significance for a number of reasons.
  • Nonwoven textiles are often used as a part of hygiene products, where the bulkiness of the material may be used both for reasons of functionality (for example as a part of the loop part of the fastening system consisting of hooks and loops or, for example, for the improvement in the distribution of liquids in the core of absorptive products) as well as for sensory reasons - the bulkiness of the material, apart from other things, gives softness and may be positively accepted in contact with the skin.
  • nonwoven textiles may be used as a part of cleaning products such as for example wipes and dusters. The improvement in bulkiness of such nonwoven textiles may also improve their effectiveness as a cleaning element.
  • the bulkiness of a nonwoven textile is directly related to the properties of the fibres that form it. Homogenous continuous fibres are typical for spunmelt nonwoven textiles. Bulkiness can subsequently be increased by the use of bonding methods.
  • One method consists of the use of such thermal bonding methods, which retain the maximum share of loose fibre segments between the individual bonding points that are used to achieve the required strength of the final material.
  • Another method consists of exposing the nonwoven textile, after calender bonding, to a jet of water (hydroenhancing or hydroentanglement) in order to fluff up the fibres and increase their specific thickness.
  • Another method consists of producing nonwoven textiles from "bicomponent" polymer fibres, includes steps where these fibres are created under the spinneret, laid to create a batt and subsequently bonded using an embossing calender selected for the purpose of achieving a certain patterned effect.
  • Such bicomponent fibres can be produced using spinnerets equipped with two adjacent sections, where the first polymer is delivered through the first one and the second polymer is delivered through the second in order to create a fibre having one part of the cross-section formed by the first polymer and the second part of the cross-section formed by the second polymer (hence the term "bicomponent").
  • the respective polymers can be selected to have differing characteristic properties, which enable, in the side-by-side or asymmetrical core / sheath geometry combinations, the curling of bicomponent fibres during the spinning process as they are cooled and drawn from under the spinneret.
  • Various documents are known to exist that deal with the application of individual differences for achieving the curling of fibres.
  • the European patent EP0685579 from Kimberly Clark describes the combination of polypropylene and polyethylene.
  • Another European patent EP1129247 from the same company describes the combination of different polypropylenes. The key here is the degree of difference of the individual described properties.
  • EP2343406 discloses a nonwoven fabric of crimped fibres as defined in the preamble of claim1.
  • a batt according to the invention comprises crimped bi- or multicomponent fibres consisting of at least two polymeric components, which are mutually arranged across the cross section of the fibers such that they promote crimping of the fibres during the setting process and which differ in the crystallisation heat, where the substance of the invention is that the difference in the crystallisation heat (dHc) is in the range from 30 J/g to 1OJ/g, preferably 30 J/g to 20 J/g and that the described polymeric components differ in at least one of the other parameters selected from the group of melt flow index, degree of polydispersion and the flexural modulus, while the relative difference of the polymer components is:
  • bath here refers to materials in the form of fibres that are found in the state prior to bonding that is performed during the calendering process described for example in patent application WO2012130414 .
  • the "batt” consists of individual fibres between which a fixed mutual bond is usually not yet formed even though they may be pre-bonded in certain ways, where this pre-bonding may occur during or shortly after the laying of fibres in the spunlaying process. This pre-bonding, however, still permits a substantial number of the fibres to be freely moveable such that they can be repositioned.
  • the here-mentioned "batt” may consist of several strata created by the deposition of fibres from several spinning beams in the spunlaying process.
  • the term "monocomponent fibre” refers to a fibre formed of a single polymer or polymer blend, as distinguished from bicomponent or multicomponent fibre.
  • Bicomponent refers to a fibre having a cross-section comprising two discrete polymer sections, two discrete polymer blend sections, or one discrete polymer section and one discrete polymer blend section.
  • the term "bicomponent fibre” is encompassed within the term "multicomponent fibre”.
  • a bicomponent fibre may have an overall cross-section divided into two or more sections consisting of differing sections of any shape or arrangement, including for example, a coaxial arrangement, core-and-sheath arrangement, side-by-side arrangement, radial arrangement.
  • multicomponent refers to a fibre having a cross-section comprising more than one discrete polymer section, or more than one polymer blend section, or at least one discrete polymer component and at least one polymer blend section.
  • multicomponent fibre thus includes, but is not limited to, "bicomponent fibre”.
  • a multicomponent fibre may have an overall cross-section divided into parts consisting of differing sections of any shape or arrangement, including, for example, a coaxial arrangement, core-and-sheath arrangement, side-by-side arrangement, radial arrangement, islands-in-the-sea arrangement.
  • nonwoven textile means a structure in the form of a fleece or webbing formed from directed or randomly oriented fibres, from which initially a batt is formed and which is subsequently consolidated and fibres are mutually bonded by friction, effects of cohesive forces, gluing or by similar methods creating a single or multiple bonding patterns consisting of bonding imprints formed by a bounded compression and/or the effect of pressure, heat, ultrasound or heat energy, or a combination of these effects if necessary.
  • the term does not refer to fabrics formed by weaving or knitting or fabrics using yarn or fibres to form bonding stitches.
  • the fibres may be of natural or synthetic origin and may be staple fibres, continuous fibres or fibres produced directly at the processing location.
  • a nonwoven textile can be produced using many methods, including technologies such as meltblown, spunbond, spunmelt, spinning from solvents, electrostatic spinning (electrospinning), carding, film fibrillation, melt-film fibrillation, airlaying, dry-laying, wetlaying with staple fibres and various combinations of these processes as known in the art.
  • the basis weight of nonwoven textiles is usually expressed in grams per square metre (gsm).
  • asymmetry when used with respect to the perpendicular plane of the fibre cross-section means that the arrangement of the fibre sections is not symmetrical, particularly respective to the central symmetry, where the centre is considered to be the centre of the fibre cross-section.
  • the term may also relate to axial symmetry, where it is necessary to assess at least as many axes passing through the centre of the cross-section of the fibre as there are polymer sections present.
  • heat is understood to mean “melting heat” or “crystallisation heat” and is always understood to mean “latent heat”.
  • a batt may consist of continuous multicomponent fibres produced for example from spunmelt process. Fibres are extruded under a spinneret and subsequently attenuated, cooled and laid down on a belt so as to form a batt of fibres. During the course of the process these fibres will curl automatically. The batt may be converted to the nonwoven fabric.
  • the individual fibres consist of at least two polymer components A and B, where the polymer components are delivered to the spinneret separately and in the resulting fibre there is a section with a predominance of the A polymer component and a section with a predominance of the B polymer component and wherein the sections in the cross-section of the fibre are arranged in a manner that supports the crimping of the fibres already during the course of the setting process of the fibre.
  • These areas can, for example, be found on the opposite sides of the fibre cross-section and so form an arrangement known in bicomponent fibres under the name side-by-side or, for example, one section may surround the second section and so form an arrangement know as core-sheath, where for the purpose of ensuring the crimping of the fibre, the overall arrangement of both sections with predominant polymeric components A,B is asymmetrical in cross-section.
  • the fibre may contain three polymer sections with predominant polymer components A, B, C arranged, for example in the arrangement known as “segmented pie” or “islands-in-the-sea", where for the purpose of ensuring the crimping of the fibre, the overall arrangement of both sections with predominant material components A,B is asymmetrical in the cross-section.
  • polypropylene + polyethylene For example one polymer together with another polymer (polypropylene + polyethylene), copolymers (polypropylene + polypropylene copolymer) or a blend (polypropylene + polypropylene blend and a polypropylene copolymer).
  • polypropylene + polyethylene copolymers
  • polypropylene + polypropylene copolymer copolymers
  • a blend polypropylene + polypropylene blend and a polypropylene copolymer
  • the same polymer with differing properties for example a difference in the melt flow index, polydispersion, degree of crystallinity of the material or its elasticity
  • a difference in the melt flow index, polydispersion, degree of crystallinity of the material or its elasticity may be used, where for success it is essential to have a significant difference in at least one of the parameters.
  • the subject of this invention is crimped multicomponent fibre where the used polymers predominant in sections are very similar to each other.
  • the polymers can be chemically the same, just a bit differ in physical properties, e.g. polypropylene-polypropylene combination.
  • polypropylene polymer made from propylene monomer units
  • tacticity of single units, or length of polymer chains or distribution of different polymer chains in polymer can bring variability in physical properties, that is significant for fiber and nonwoven production.
  • a person skilled in the field will appreciate the wide range of commercial types of polymers available on the market and will also appreciate the various amounts and availability of the individual types. Due to the distribution in demand, the offer is also concentrated particularly at polymers in a relatively narrow area of properties. A considerable advantage arising from the use of significantly similar polymers is also that they are relatively readily available on the market.
  • the mentioned polymer sections may be formed using one polymer or may be formed using a blend of various compounds. It is known in the industry that there also exist fibres consisting of multicomponent fibres based on the same polymer, the components differing only in the addition of an admixture. For example US file 6,203,905 from Kimberly Clark describes the addition of a nucleation additive into one section of the bicomponent fibre.
  • the principle of our invention may consists of predominant polymeric components only or of predominant components and added additives.
  • the principle of our invention may also contain the addition of additives (for example dyes), but the addition of such an additive does not affect the crimping of fibres to a significant degree.
  • the additive may, for example, be added to both sections symmetrically.
  • some functional additives may induce a chemical reaction directly in the polymer melt immediately before spinning and their effectiveness may be affected, for example by the temperature of the melt (for example IRGATEC CR76 from BASF).
  • melt flow index for example melt flow index, polydispersion
  • the principle of the invention may contain the addition of functional additives, but this addition does not affect the crimping of fibres to a significant degree.
  • the key variable is the latent heat of crystallisation (dHc), which is an indicator of the amount of energy that it is necessary to take from the system in order for the crystallisation of the polymer components to occur.
  • dHc latent heat of crystallisation
  • a known document Kimberly-Clark EP0685579 determines the minimum difference in the melting heat, which equates approximately to a crystallisation heat of 40 J/g.
  • the crimping of the fibres occurs at smaller differences, when a surprisingly significant synergistic effect of other differences between the predominant component in sections is taken advantage of.
  • the curling or crimping of fibres based on the invention results from the combination of small differences in the crystallisation heat (dHc) and in at least one, preferably two more parameters of the polymer.
  • the individual predominant components differ in the heat of crystallisation (dHc), where the difference in the values is in the range of 30 J/g to 10 J/g, and preferably 30 J/g to 20 J/g.
  • the heat of crystallisation difference (dHc) can be in the range of 24 J/g to 10 J/g, and preferably 24 J/g to 20 J/g.
  • the individual predominant components may differ in the melt flow index (MFI) level, where the difference between the values is in the range of approximately 100g/10min to 5g/10min, better yet 80g/10min; preferably 60g/10min to 10g/10min.
  • MFI melt flow index
  • the individual predominant components may, furthermore, differ in the degree of the material's polydispersion, where the difference in the values is in the range 1 to 0.3, better yet 1 to 0.5 and preferably 1 to 0.75.
  • the individual predominant components may, furthermore, differ in the flexural modulus of the material, where the difference in the values is in the range 300 MPa to 50 MPa, better yet 250 MPa to 80 MPa and preferably 200 MPa to 80 MPa.
  • the individual predominant components of sections may differ in the crystallisation temperature, where the difference in the values is in the range of approximately 5-30°C, better yet 5-25°C and preferably 8-25°C.
  • the individual predominant components of sections may differ in crystallisation speed, where the difference in the values is at least 20 seconds, better yet 50 seconds, better yet 120 seconds and preferably 150 seconds.
  • the polymer components are dosed (1) into separate extrusion systems (2), where they are melted, heated to a suitable operating temperature and still separated brought to the spinnerets (4) where the multicomponent fibre is formed.
  • a person skilled in the art will understand that the process for preparing polymers for spinning in the form of a multicomponent fibre may, depending on the type of technology encompass further specific steps, as well as the fact that various additives designed for this purpose may be added to the polymer components for the purpose of for example changing the colour of the fibres (dyes) or to change the properties of the fibres (for example hydrophilicity, hydrophobicity, inflammability), where according to the invention it is significant for the material that these additive do not affect the crimping of fibres and/or they are dispersed symmetrically in the resulting fibre.
  • the fibre (5) formed under the spinneret (8) is exposed to a stream of cooling and attenuating air (6,7), so crimps form on the fibres before they fall (8) on to the collecting mat (10).
  • Both cooling and attenuating air (6,7) has approximately the room temperature, preferably 10-30°C, more preferably 15-25°C.
  • the collecting mat (10) may, for example, be a moving belt that carries away the forming fibre batt (11). During the way on collecting mat (10) there is no extra heat or mechanical energy entrance to support the crimping.
  • spinning beams can be arranged in sequence, where they all may produce crimped fibres or may lay different layers (e.g. simple spunmelt fibres - e.g. spunbond or meltblown, nanofibres, a film).
  • layers e.g. simple spunmelt fibres - e.g. spunbond or meltblown, nanofibres, a film.
  • the layer/layers of crimped fibres are laid down on other layers so that undesirable compression of the crimped fibres does not occur.
  • the layer or layers of fibres are subsequently strengthened (12), where several known methods may be used (for example thermal bonding, thermal calender bonding, needle punching, hydroentanglement).
  • the individual bonding methods have a significant effect on the resulting properties of the materials and a person skilled in the field will easily determine which method is suitable for their material.
  • this skilled person will also understand that the selection of a bonding method with a higher intensity or bonding point density may result even in negating the differences in the overall bulkiness of the resulting nonwoven textile containing fibres based on the invention and standard materials containing non-crimped fibres.
  • Final nonwoven web can be used at various applications as for non limited list of following examples: both dusting and hygiene wipes including wet wipes; parts of furniture; parts of household equipment including for example tablecloth, counterplead, covering material; parts of hygiene absorbent articles for all babies, femcare and adult inco as for example it can create or be part of nonwoven landing zone, ADL (Acquisition Distribution Layer), backsheet, topsheet, side panels, core wrap, leg cuffs.
  • ADL Application Distribution Layer
  • Example 1 design based on the invention
  • a batt consist of continuous bicomponent fibres, where one component consists of polypropylene MR 2002 from Total Petrochemicals and the second component consists of polypropylene Mosten NB425 from Unipetrol. Both polypropylene homopolymer materials are readily available on the market, both are inelastic and crystalline.
  • the fibres were produced on a Reicofil 3 production line for spunmelt nonwoven textiles and removed from the lied batt prior to the bonding of the material.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 40: 60.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Mosten NB425.
  • the average degree of crimping achieved was 13.4 crimps / 20 mm.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 30:70.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Mosten NB425.
  • the average degree of crimping achieved was 15.8 crimps / 20 mm.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 65: 35.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Mosten NB425.
  • the average degree of crimping achieved was 8.2 crimps / 20 mm.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 50: 50.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Mosten NB425.
  • the average degree of crimping achieved was 11.7 crimps / 20 mm.
  • Example 2 design based on the invention
  • a batt consist of continuous bicomponent fibres, where one component consists of polypropylene MR 2002 from Total Petrochemicals and the second component consists of polypropylene Tatren HT2511 from Slovnaft. Both polypropylene homopolymer materials are readily available on the market, both are inelastic and crystalline.
  • the fibres were produced on a Reicofil 3 production line for spunmelt nonwoven textiles and removed from the lied batt prior to the bonding of the material.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 30: 70.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Tatren HT2511.
  • the average degree of crimping achieved was 15.9 crimps / 20 mm.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 40:60.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Tatren HT2511.
  • the average degree of crimping achieved was 12.8 crimps / 20 mm.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 50:50.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Tatren HT2511.
  • the average degree of crimping achieved was 12.0 crimps / 20 mm.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 70: 30.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Tatren HT2511.
  • the average degree of crimping achieved was 7.3 crimps / 20 mm.
  • Example 3 design based on the invention - lab line
  • a batt consists of continuous bicomponent fibres, fibers produced on a laboratory spinning line with compressed air filament attenuating up to 0,9 MPa, spinning die with 12 holes, hole diameter 0,5 mm, hole length 0,8 mm. Extrusion system with two independent extruders (diameter 16 mm). Line throughput 0,5 gram per minute per hole. Line is available for example at Research Institute for Man-Made Fibres "VUCHV a.s. Svit", Slovak Republik.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 40: 60.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Tatren HT2511. Attenuating air pressure was 0,85 MPa.
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 40: 60.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Mosten NB425. Attenuating air pressure was 0,85 MPa. Predom. polymer in first section Predom. polymer in first section 3A Predom.
  • Example 4 design based on the invention - including calendering
  • Continuous bicomponent fibre was of the side-by-side type and the individual sections were formed in the weight ratio 40: 60.
  • First section consists of polypropylene MR 2002 and second section consist of polypropylene Tatren HT2511. Both polypropylene homopolymer materials are readily available on the market, both are inelastic and crystalline.
  • MR 2002 from Total Petrochemicals difference Tatren HT2511 from Slovnaft Melt flow index (MFI) (g/10 min) 15 10 25 Polydispersion (PDI) 2.6 0.1 2.7
  • the fibres were produced on a Reicofil 4 SSS production line for spunmelt nonwoven textiles. Attenuating air temperature 15-25°C °C, cabine pressure in the area 2800-3200 Pa. The batt was thermobonded using pair of smooth-gravure rolls with Ungricht design U2888M (standard oval). Smooth roll temperature 170-180°C, gravure roll temperature 160-170°C, nip 120-125 daN/cm.
  • the fibers removed from the lied batt prior to the bonding of the material had the average degree of crimping 15.7 crimps / 20 mm.
  • “Degree of crimping" of the fibre is measured using the method described in the norm SN 80 0202 from 1969. Measurement is performed on individual fibres under standard conditions (an individual fibre is loosely placed on a mat for 24 hours at a temperature of 20°C and at a relative humidity of 65%). The fibre is subsequently hung vertically and subject to a strain of 0.0076g (for a fibre with a fineness of 1-5 den, i.e. 0.111 - 0.555 tex). The number of crimps is counted on a length of 20 mm.
  • MFI Melt flow index
  • “Flexural modulus” of a polymer is measured using the testing methodology described in ISO 178:2010.
  • Crystallinity "latent heat of crystallisation”, “temperature of crystallisation” and the “melting temperature” are measured using the testing methodology describe in ASTM D3417 using DSC, where the speed in the temperature is 2°C/min in the measured range of 200 - 80°C and the sample volume is 7-7.4g.
  • the batt produced according to the invention are applicable namely for the production of nonwoven textiles, where they can form a production step on an online production line.
  • the nonwoven textile produced from the batt made according to the invention is widely applicable in various fields, namely in hygiene products such a baby diapers, feminine absorptive products or incontinence products.
  • Crimped fibres create a fluffiness in the textile meaning that the material can be advantageously used both in applications requiring softness and silkiness (for example parts of absorptive products, which are in direct contact with the user's skin) and in applications requiring bulkiness (wipes, loop side in the "hook and loop” system .).

Claims (14)

  1. Une couche des fibres comprenant des fibres crêpées à deux composantes ou à composantes multiples et constituée par au moins deux sections, qui comprennent un polymère ou un mélange de polymères en tant qu'une composante prédominante et qui sont disposées à travers la coupe de section transversale de la fibre d'une manière appropriée pour favoriser le crêpage de la fibre pendant le processus de solidification et dont les composantes prédominantes diffèrent quant à la cristallisation thermique (dHc), caractérisée en ce que la différence de la chaleur de cristallisation dHc est dans l'intervalle allant de 30 J/g à 10 J/g, de préférence 30 J/g à 20 J/g et dont les composantes prédominantes diffèrent au moins par l'un des autres paramètres choisis dans le groupe d'indice de fluidité à chaud, le degré de polydispersité et le module de flexion, tandis que la différence relative des composantes prédominantes est la suivante :
    pour l'indice de fluidité à chaud dans l'intervalle de 100 g/ 10 min à 5 g/ 10 min et/ou
    pour le degré de polydispersité inférieur à 1, mais au-dessus de 0,3, et / ou
    pour le module de flexion dans l'intervalle de 300 MPa à 50 MPa ;
    où la différence relative de l'indice de fluidité à chaud ne dépasse pas 100 g/ 10 min, du degré de polydispersité est inférieur à 1, du module de flexion n'est pas plus de 300 MPa, et où lesdites fibres ont le degré de crêpage d'au moins 5 frisures par 20 mm de la fibre.
  2. Une couche des fibres comprenant des fibres crêpées selon la revendication 1, dans laquelle la différenciation relative des composantes prédominantes dans l'indice de fluidité à chaud est dans l'intervalle de 80 g/ 10 min à 5 g/ 10 min, de préférence de 60 g/ 10 min à 10 g/ 10 min.
  3. Une couche des fibres comprenant des fibres crêpées selon la revendication 1 ou 2, dans laquelle la différenciation relative des composantes prédominantes du degré de polydispersion est dans l'intervalle de 1 à 0,5, de préférence de 1 à 0,7.
  4. Une couche des fibres comprenant des fibres crêpées selon l'une quelconque des revendications précédentes, dans laquelle la différenciation relative des composantes prédominantes dans le module de flexion est dans l'intervalle de 250 MPa à 80 MPa, de préférence de 200 MPa à 80 MPa.
  5. Une couche des fibres crêpées selon l'une quelconque des revendications précédentes, dans laquelle les fibres sont des fibres bicomposantes du type côte à côte.
  6. Une couche des fibres comprenant des fibres crêpées selon la revendication 5, dans laquelle toutes les deux composantes prédominantes des fibres à bicomposantes sont un homopolymère de propylène.
  7. Une couche des fibres comprenant des fibres crêpées selon l'une quelconque des revendications précédentes, dans laquelle lesdites composantes prédominantes sont disposées à travers la coupe de section transversale des fibres, centralement asymétriquement et / ou axialement asymétriquement par rapport à un certain nombre d'axes passant par le centre de la coupe de section transversale de la fibre, ce qui égalise le nombre de sections de polymère dans la fibre.
  8. Une couche des fibres selon l'une quelconque des revendications précédentes, dans laquelle les fibres comprennent un additif, et dans laquelle l'additif est présent dans les composantes de telle sorte qu'il ne modifie pas le crêpage de la fibre à un degré significatif.
  9. Le textile non-tissé, caractérisé en ce qu'il comprend une couche des fibres selon l'une quelconque des revendications précédentes.
  10. Le textile non-tissé selon la revendication 9, dans lequel le textile non tissé est de type spunmelt.
  11. Procédé de fabrication d'une couche des fibres comprenant des fibres à multicomposantes, dans lequel le procédé comprend les étapes suivantes :
    i. la préparation d'au moins deux matériaux comprenant un polymère ou un mélange de polymères en tant qu'une composante prédominante, des matériaux étant convenables pour la formation de fibres;
    ii. puis la formation des fibres multicomposantes à partir des matériaux préparés au desous de la buse, à savoir des fibres multicomposantes comprenant les matériaux disposés dans les sections, qui sont disposées à travers la coupe de section transversale de la fibre d'une manière appropriée pour favoriser le crêpage de la fibre pendant le processus de solidification, puis les fibres sont refroidies et étirées par l'air refroidissant et étirant, et
    iii. la formation d'une couche des fibres à partir desdites fibres multicomposantes ;
    caractérisée en ce que :
    lesdites composantes prédominantes dans les sections sont choisies de telle sorte qu'elles diffèrent par la chaleur de cristallisation dHc dans l'intervalle de 30 J / g à 10 J / g, de préférence de 30 J / g à 20 J / g, et qu'elles diffèrent dans au moins un autre paramètre sélectionné parmi le groupe d'indice de fluidité à chaud, de degré de polydispersion et de module de flexion, où la différenciation relative des composantes polymères est la suivante :
    pour l'indice de fluidité à chaud dans l'intervalle de 100 g / 10 min à 5 g /10 min et / ou
    pour le degré de polydispersité dans l'intervalle de 1 à 0,3, et / ou
    pour le module de flexion dans l'intervalle de 300 MPa à 50 MPa ;
    où la différence relative de l'indice de fluidité à chaud ne dépasse pas 100 g / 10 min, le degré de polydispersité n'est pas supérieur à 1, le module de flexion n'est pas supérieur à 300 MPa, et
    où lesdites fibres ont le degré de crêpage d'au moins 5 frisures par 20 mm de fibre.
  12. Procédé selon la revendication 11, dans lequel lesdites sections avec des composantes prédominantes sont disposées à travers la coupe de section transversale de la fibre centralement asymétriquement et / ou axialement asymétriquement par rapport au nombre d'axes passant par le centre de la coupe de section transversale de la fibre, qui égalise le nombre de sections présentes dans la fibre.
  13. Procédé selon la revendication 11, dans lequel lesdites fibres à multicomposantes sont les fibres à deux composantes du type côte à côte.
  14. Procédé selon la revendication 11, dans lequel lesdites sections de polymère contiennent un homopolymère de polypropylène en tant que leur composante prédominante.
EP14705962.0A 2013-01-14 2014-01-14 Nappage comprenant des fibres bi- ou multi-composants crêpées Active EP2943607B1 (fr)

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CZ2013-24A CZ201324A3 (cs) 2013-01-14 2013-01-14 Vrstva vláken obsahující obloučkovaná bi-nebo multi-komponentní vlákna a způsob její výroby
PCT/CZ2014/000005 WO2014108106A1 (fr) 2013-01-14 2014-01-14 Nappage comprenant des fibres bi- ou multi-composants crêpées

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JP (1) JP6508654B2 (fr)
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BR (1) BR112015016685A2 (fr)
CZ (1) CZ201324A3 (fr)
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ES (1) ES2628416T3 (fr)
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PL (1) PL2943607T3 (fr)
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CN107072836B (zh) 2014-11-06 2021-03-16 宝洁公司 用于制备图案化开孔纤维网的方法
WO2016073724A1 (fr) 2014-11-06 2016-05-12 The Procter & Gamble Company Bandes/stratifiés de non-tissé filé-lié à fibres frisées
TW201739603A (zh) 2016-01-27 2017-11-16 歐拓管理股份公司 用於汽車引擎室的吸音襯及具有其之吸音飾板部件
EP3246444B1 (fr) * 2016-05-18 2020-04-08 Fibertex Personal Care A/S Procédé de fabrication d'une bande de non-tissé à fort effet gonflant
EP4056158B1 (fr) 2017-02-16 2024-03-06 The Procter & Gamble Company Articles absorbants avec des substrats ayant des motifs répétitifs d'ouvertures comprenant une pluralité d'unités répétitives
JP6865063B2 (ja) * 2017-03-02 2021-04-28 旭化成株式会社 バリア性に優れた嵩高性複合長繊維不織布
PL3521496T3 (pl) * 2018-01-31 2020-09-07 Reifenhäuser GmbH & Co. KG Maschinenfabrik Laminat z włókniny spunbond i sposób wytwarzania laminatu z włókniny spunbond
JP7251362B2 (ja) * 2019-07-01 2023-04-04 王子ホールディングス株式会社 不織布の製造方法
CN115247319A (zh) * 2021-12-22 2022-10-28 青岛大学 一种并列双组份熔喷纤维过滤材料及其制备方法

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MY171876A (en) 2019-11-05
CN105051280A (zh) 2015-11-11
WO2014108106A8 (fr) 2015-07-09
ZA201504970B (en) 2016-07-27
DK2943607T3 (en) 2017-06-26
JP6508654B2 (ja) 2019-05-08
PL2943607T3 (pl) 2017-09-29
BR112015016685A2 (pt) 2017-07-11
US20150354112A1 (en) 2015-12-10
SA515360784B1 (ar) 2017-11-07
ES2628416T3 (es) 2017-08-02
WO2014108106A1 (fr) 2014-07-17
HUE034578T2 (en) 2018-02-28
CZ201324A3 (cs) 2014-07-23
RU2649264C2 (ru) 2018-03-30
EP2943607A1 (fr) 2015-11-18
RU2015132469A (ru) 2017-02-21

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