WO2002009491A2 - Tissus aux caractéristiques de surface modifiées - Google Patents

Tissus aux caractéristiques de surface modifiées Download PDF

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Publication number
WO2002009491A2
WO2002009491A2 PCT/US2001/023938 US0123938W WO0209491A2 WO 2002009491 A2 WO2002009491 A2 WO 2002009491A2 US 0123938 W US0123938 W US 0123938W WO 0209491 A2 WO0209491 A2 WO 0209491A2
Authority
WO
WIPO (PCT)
Prior art keywords
multicomponent
nonwoven web
component
active agent
fibers
Prior art date
Application number
PCT/US2001/023938
Other languages
English (en)
Other versions
WO2002009491A3 (fr
Inventor
Bryan David Haynes
Roger Bradshaw Quincy, Iii
Darryl Franklin Clark
Matthew Boyd Lake
Original Assignee
Kimberly-Clark Worldwide, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kimberly-Clark Worldwide, Inc. filed Critical Kimberly-Clark Worldwide, Inc.
Priority to JP2002515060A priority Critical patent/JP2004505180A/ja
Priority to AU2001279092A priority patent/AU2001279092A1/en
Priority to KR10-2003-7001472A priority patent/KR20030022344A/ko
Priority to MXPA03000469A priority patent/MXPA03000469A/es
Priority to EP01957336A priority patent/EP1307612A2/fr
Priority to BR0112808-6A priority patent/BR0112808A/pt
Publication of WO2002009491A2 publication Critical patent/WO2002009491A2/fr
Publication of WO2002009491A3 publication Critical patent/WO2002009491A3/fr

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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
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • 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
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5414—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres side-by-side
    • 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
    • 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
    • D04H1/54—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
    • D04H1/559—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 the fibres being within layered webs
    • 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
    • D04H1/56—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 in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F2013/51002—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers with special fibres
    • A61F2013/51023—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers with special fibres being polymeric fibres
    • A61F2013/51028—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers with special fibres being polymeric fibres being bicomponent

Definitions

  • the present invention relates to fabrics having modified surface properties and, more particularly, fabrics having improved liquid barrier and/or repellency properties.
  • active agents have heretofore been applied to fabrics by applying the chemical composition to one surface of the fabric and then applying a vacuum to the opposite surface of the fabric.
  • the drawing force of the vacuum is intended to help pull the active agent into the fabric and treat the fibers within the interior of the fabric.
  • topically coating fiber surfaces with chemical compositions is generally described in US Patent No. 4,266,976 to Gregorian et al. and US Patent No. 4,385,954 to
  • Such processes can also leave an excessive amount of the treatments on the outer surface of the fabric that, with many chemical compositions, can promote transfer of the chemical composition to adjacent surfaces and give the fabric an oily feel. This is highly undesirable for fabrics that will be handled and/or be utilized in an article adjacent a persons skin. Still further, such non-uniform treatment may require the use of higher levels of active agent to achieve the desired physical properties.
  • a nonwoven fabric of the present invention comprising a web of multicomponent thermoplastic polymer fibers having at least one component A and at least one component B arranged in substantially distinct zones across the fiber cross-section and extending substantially continuously along the length of the fibers wherein the components A and B each have exposed portions forming the outer surface of the multicomponent fibers.
  • the exposed portion or portions of component A comprise at least about 25% of the peripheral surface of the fibers.
  • component A comprises a thermoplastic polymer and an active agent and has active agent upon the exposed portion thereof.
  • Component B comprises a thermoplastic polymer and contains from 100% to 50% by weight less active agent than component A.
  • component A comprises at least about 50% of the outer surface of the multicomponent fibers.
  • component A can comprise at least two discrete components separated by one or more B components.
  • the multicomponent fibers desirably have an average fiber diameter less than about 25 micrometers and, more desirably, have an average fiber diameter less than about 10 micrometers.
  • the active agent can comprise wetting agents or liquid repellency agents.
  • no single or continuous exposed portions of component B comprise more than about 35% of the peripheral surface of the multicomponent fiber.
  • component B desirably comprises at least about 45%, by volume, of the fiber cross-section.
  • nonwoven fabrics having good liquid barrier and/or repellency properties can be provided wherein the active agent comprises a liquid repellency agent and the multicomponent fibers have an average denier less than about 1.
  • the active agent may comprise less than 0.75%, by weight, of the multicomponent fibers and the nonwoven web may also have a basis weight less than about 50 g/m 2 .
  • such nonwoven fabrics can be provided having an alcohol repellency rating of 50 or more.
  • Figure 1 is a drawing illustrating the cross-section of a multicomponent fiber, suitable for use with the present invention, having polymeric components A and B in a striped configuration.
  • Figure 2 is a drawing illustrating the cross-section of a multicomponent fiber, suitable for use with the present invention, with the polymer components A and B in a wedge configuration.
  • Figure 3 is a drawing illustrating the cross-section of a multicomponent fiber, suitable for use with the present invention, with the polymer components A and B in a configuration wherein a plurality of wedge-like components are separated by a central component having radially extending arms.
  • Figure 4 is a partially broken-away view of a multilayer nonwoven laminate incorporating a meltblown fiber web comprising multicomponent fibers.
  • the term “comprising” is inclusive or open-ended and does not exclude additional unrecited elements, compositional components, or method steps. Accordingly, the term “comprising” encompasses the more restrictive terms “consisting essentially of and “consisting of.”
  • active agent refers to any chemical compound or composition that imparts or improves at least one physical property or functional characteristic of a fiber surface.
  • wetting agent refers to any chemical compound or composition that makes a fiber surface exhibit increased hydrophilic characteristics such as by lowering the contact angle of an aqueous fluid that comes in contact with the fiber surface.
  • liquid repellency agent refers to any chemical compound or composition that makes a fiber surface exhibit increased barrier or repellency characteristics for a particular liquid such as by increasing the contact angle for the particular liquid that comes in contact with the fiber surface.
  • fabric means a material comprising a network of fibers including, but not limited to, woven or knitted materials, tufted or tufted-like materials, nonwoven webs, and so forth.
  • nonwoven fabric or web means a web having a structure of individual fibers or threads which are interlaid, but not in an identifiable manner as in a knitted or woven fabric.
  • Nonwoven fabrics or webs have been formed by many processes such as, for example, meltblowing processes, spunbonding processes, hydroentangling, air- laid and bonded carded web processes.
  • polymer generally includes but is not limited to, homopolymers, copolymers, such as for example, block, graft, random and alternating copolymers, terpolymers, etc. and blends and modifications thereof.
  • the term “polymer” includes all possible geometric or spatial configurations of the molecule. These configurations include, but are not limited to isotactic, syndiotactic and random symmetries.
  • medical fabric means medically oriented items such as surgical gowns and drapes, face masks, bouffant caps, surgical caps and hoods, shoe coverings, slippers, wound dressings, bandages, sterilization wraps, wipers, garments like lab coats, coveralls, aprons and jackets, patient bedding, and so forth.
  • personal care product means personal hygiene oriented items such as wipes, diapers, training pants, absorbent underpants, adult incontinence products, feminine hygiene products, and so forth.
  • protective cover means a cover for vehicles, covers for outdoor equipment and furniture, yard and garden equipment, floor coverings, table cloths, tents, tarpaulins, and so forth.
  • Fabrics of the present invention comprise an integrated layer or sheet of multicomponent fibers having at least two components and wherein the surface properties of the fibers are modified by an active agent primarily located within less than all of the components.
  • multicomponent refers to fibers that have been formed from at least two polymer streams and extruded to form a unitary fiber.
  • the individual components of a multicomponent fiber are arranged in distinct regions in the fiber cross-section, which extend substantially continuously along the length of the fiber.
  • the cross-sectional configuration of the multicomponent fibers has at least two distinct components that comprise a portion of the outer surface of the fiber.
  • the multicomponent fiber has three, four or more exposed segments forming the outer surface of the fiber.
  • the multicomponent fiber comprises at least first and second components wherein the second component comprises significantly less active agent than the first component.
  • the second component comprises at least about 50% (by weight) less active agent than the first component and still more desirably comprises at least about 75% less active agent than the first component and still further may comprise about 95% less active agent than the first component.
  • the second component may have 100% less active agent than the first component, i.e. zero weight percent active agent therein.
  • the individual components of the fiber can be positioned in a striped, side-by-side arrangement wherein the individual components A and B are adjacent one another and each component occupies at least a portion of the periphery or outer surface of the fiber.
  • wedge or "pie" shaped configurations comprising alternating wedge shaped segments A and B are also suitable for use in connection with the present invention.
  • a plurality of components A can be separated by a central B component having radial extending arms or lobes.
  • the respective polymer components A and B can be present in ratios (by volume) of from about 90/10 to about 10/90 and desirably range between about 75/25 and about 25/75. Ratios of approximately 50/50 are often particularly desirable however the particular ratios employed can vary as desired.
  • the individual components of the multicomponent fibers are arranged in the fiber cross-section such that the component(s) having a minor amount or lacking the internal active agent comprises no more than about 70% of the periphery or outer surface of the fiber.
  • the component(s) containing the major amount of active agent comprise greater than 30% of the outer surface of the fiber and still more desirably at least about 50% of the outer surface of the fiber and even more desirably between about 55% and about 85% of the outer surface of the fiber.
  • the exposed segments of component(s) having a minor amount of or lacking the internal active agent desirably do not form a single or continuous segment greater than about 35% of the outer surface of the fiber and still more desirably do not form a single or continuous exposed segment extending over about 25% of the outer surface of the fiber.
  • component B may comprise approximately 50% by volume of the fiber and yet the two, discrete exposed portions each comprise approximately 10-15% of the outer surface of the multicomponent fiber.
  • the exposed segments of the B components may collectively comprise approximately 50% of the outer surface of the multicomponent fiber, the exposed segments or portions each comprise only about 12.5% of the outer surface of the fiber.
  • the fibers desirably have a denier (g/9000 meters) of less than about 4 and still more desirably less than about 1 and even more desirably less than about 0.5.
  • the fibers can have an average cross-sectional diameter of less than about 25 micrometers and desirably have an average cross-sectional diameter between about 0.5 micrometers and about 10 micrometers and still more desirably between about 1 and about 5 micrometers.
  • average fiber size is determined using the largest dimension in the fiber cross-section.
  • fibers are commonly manufactured as solid- round structures it will be appreciated that the multicomponent fibers of the present invention can also have various fiber shapes other than solid-round fibers such as, for example, hollow, multilobal or flat (e.g. ribbon shaped) fibers.
  • the components forming the fibers can comprise one or more melt-processable polymers.
  • the individual components can comprise the same, similar and/or different polymers. However, at least two of the individual components are distinct in that they have selected and distinct amounts of active agent therein.
  • the polymeric components of the multicomponent fibers are desirably selected from thermoplastic polymers including, but are not limited to, polyolefins (e.g., polypropylene and polyethylene), polycondensates (e.g., polyamides, polyesters, polycarbonates, and polyarylates), polyols, polydienes, polyurethanes, polyethers, polyacrylates, polyacetals, polyimides, cellulose esters, polystyrenes and so forth.
  • polyolefins e.g., polypropylene and polyethylene
  • polycondensates e.g., polyamides, polyesters, polycarbonates, and polyarylates
  • polyols polydienes
  • the polymeric components can comprise polyethylene, polypropylene, poly(l-butene), poly(2-butene), poly(1 -pentene), poly(2- pentene), poly(1-methyl-1 -pentene), poly(3-methyl-1 -pentene), and poly(4-methyl-1- pentene) and so forth.
  • blends and/or copolymers of the aforesaid polymers are likewise suitable for use in one or more components of the multicomponent fiber.
  • the individual components or segments comprising the multicomponent fiber can comprise the same polymer or different polymers.
  • desired combinations of polymer segments can comprise polyolefin/polyamide; polyolefin/polyester; polyolefin/polyolefin and so forth.
  • suitable polymeric component combinations include, but are not limited to, polypropylene/polyethylene, polypropylene/polypropylene, polyethylene/nylon, polyethylene/polyester and so forth.
  • components A can comprise a mixture of a propylene polymer and an active agent and component(s) B can comprise a propylene polymer.
  • components A can comprise an active agent and a blend of polypropylene and polybutylene and component(s) B can comprise polypropylene. Still further, components A can comprise an active agent and polypropylene and component(s) B can comprise a blend of polypropylene and polybutylene. Exemplary polypropylene and polybutylene blends include, but not limited to, those described in US Patent Nos. 5,204,174 and 5,482,765. The fibers comprising the fabric can be made by various melt-processing techniques.
  • multicomponent fibers can be made by simultaneously directing two or more streams of molten polymer such that the polymer streams come together to form a unitary filament immediately prior to or just after extruding the polymers from a die or other extrusion device.
  • the polymers are desirably fed to the die via separate conduits and kept separate until just prior to extrusion.
  • a divider plate can be utilized to maintain the separation of the polymer streams up to and until the polymer reaches the die capillary.
  • multicomponent fibers can be made utilizing spin pack assemblies.
  • a spin pack assembly can include a housing and a plurality of distribution plates stacked one on top of the other with a pattern of openings arranged to create flow paths for directing polymer components A and B separately through the spin pack assembly.
  • the distribution plates are coupled to a spin plate or spinneret which often has a plurality of openings arranged in one or more rows.
  • Exemplary methods and apparatus for making multicomponent nonwoven webs are described in US Patent No. 3,425,091 to Ueda et al., US Patent No. 3,981 ,650 to Page, US Patent No. 5,601 ,851 to Terakawa et al., US Patent No. 5,989,004 to Cook, US Patent No. 5,344,297 to Hills and US Patent No. 5,382,400 to Pike et al.
  • Fibers and/or fabrics of the present invention can be made using conventional melt- processing equipment modified to form multicomponent fibers.
  • Exemplary fiber forming processes include, but are not limited to, meltblown and spunbond processes.
  • the fibers can be substantially continuous fibers or short, i.e. staple length, fibers.
  • fibers and fabrics of the present invention can be made using meltblown fiber equipment.
  • multicomponent meltblown fiber nonwoven webs can be made in accord with meltblowing processes such as, for example, those described in US Patent 3,849,241 to Butin et al.; US Patent No. 5,160,746 to Dodge et al.; US Patent No. 4,526,733 to Lau; US Patent No.
  • the particular active agent or agents included within one or more of the components can be selected as desired to impart or improve specific surface characteristics of the fiber and thereby modify the properties of the fabric made therefrom.
  • a variety of active agents or chemical compounds have heretofore been utilized to impart or improve various surface properties including, but not limited to, absorbency, wettability, anti-static properties, anti-microbial properties, anti-fungal properties, liquid repellency (e.g. alcohol or water) and so forth.
  • liquid repellency e.g. alcohol or water
  • wettability or absorbency of a particular fabric many fabrics inherently exhibit good affinity or absorption characteristics for only specific liquids.
  • polyolefin nonwoven webs have heretofore been used to absorb oil or hydrocarbon based liquids.
  • polyolefin nonwoven wipes are inherently oleophillic and hydrophobic.
  • polyolefin nonwoven fabrics need to be treated in some manner in order to impart good wetting characteristics or absorbency for water or aqueous solutions or emulsions.
  • exemplary wetting agents that can be melt-processed within one of the segments in order to impart improved wettability to the fiber include, but are not limited to, ethoxylated silicone surfactants, ethoxylated hydrocarbon surfactants, ethoxylated fluorocarbon surfactants and so forth.
  • exemplary chemistries useful in making melt-processed thermoplastic fibers more hydrophilic are described in US Patent Nos. 3,973,068 and 4,070,218 to Weber et al., and US Patent No. 5,696,191 to Nohr et al.; the entire contents of the aforesaid references are incorporated herein by reference.
  • thermoplastic fibers to better repel alcohol can be imparted by mixing a chemical composition having the desired repellency characteristics with the thermoplastic polymer resin prior to extrusion and thereafter melt-processing the mixture into one or more of the segments.
  • the active agent migrates to the surface of the polymeric component thereby modifying the surface properties of the same.
  • compositions suitable for use in melt-extrusion processes and that improve alcohol repellency include, but are not limited to, fluorochemicals.
  • Exemplary melt-processable liquid repellency agents include those available from DuPont under the trade name ZONYL fluorochemicals and also those available from 3M under the trade designation FX-1801.
  • Various active agents suitable for imparting alcohol repellency to thermoplastic fibers are described in US Patent 5,145,727 to Potts et al., US Patent No. 4,855,360 to Duchesne et al., US Patent No. 4,863,983 to Johnson et al., US Patent No. 5,798,402 to Fitzgerald et al., US Patent No. 5,459,188 and US Patent No. 5,025,052; the entire contents of the aforesaid references are incorporated herein by reference.
  • the active agent desirably comprises less than about 5% of the entire multicomponent fiber and more desirably comprises between about 0.1% and about 3% of the entire multicomponent fiber and still more desirably between about 0.2% and about 2% of the entire multicomponent fiber.
  • the active agent and polymer are desirably extruded in a mixture wherein the active agent comprises between about 0.1% and about 5% by weight extrudate and still more desirably comprises between about 0.2% and about 1% of the extrudate.
  • fabrics having good alcohol repellency can be provided wherein the multicomponent fibers comprise less than 0.8%, by weight, liquid repellency agent and still more desirably comprise about 0.6% or less liquid repellency agent.
  • Additional materials which are compatible with and which do not substantially degrade the performance of the particular active agent, can optionally be added to and extruded with one or more of the polymeric components.
  • one or more of the individual components of the multicomponent fiber can optionally include additional surfactants, dyes, stabilizers, pigments, fragrances, and so forth.
  • the fabrics of the present invention desirably have a basis weight between about 7 g/m 2 and about 340 g/m 2 and still more desirably have a basis weight between about 14 g/m 2 and about 68 g/m 2 .
  • the fabrics can have an alcohol repellency rating of at least 30 and desirably have an alcohol repellency rating of at least about 50 and even more desirably an alcohol repellency rating of at least about 65.
  • a multicomponent meltblown fabric can be provided having a basis weight between about 14 g/m 2 and about 50 g/m 2 and alcohol repellency rating over 50.
  • the fabrics of the present invention can be used alone or as part of a multilayer structure.
  • a multilayer nonwoven laminate 20 comprising a multicomponent meltblown fiber web 22 laminated to sheet-like layer or fabric 24 such as, for example, a nonwoven web of spunbond fibers.
  • the multilayer laminate can comprise a three layer laminate 20 such as, for example, an intermediate layer of multicomponent meltblown fibers 22 between a first spunbond fiber web 24 and a second spunbond fiber web 26 to form a spunbond/meltblown/spunbond (SMS) nonwoven web laminate.
  • the individual layers can be attached to one another by one or more means known in the art such as, for example, by thermal, ultrasonic and/or adhesively bonding the layers together.
  • individual layers can be pattern bonded such as, for example, by point bonding.
  • point bonding means bonding one or more layers of fabric at numerous small, discrete bond points such as, for example, bond points 28 depicted in FIG. 4.
  • thermal point bonding generally involves passing one or more layers to be bonded between heated rolls such as, for example, an engraved or patterned roll and a second roll.
  • the engraved roll is patterned in some way so that the fabric is not bonded over its entire surface, and the second roll can either be flat or patterned.
  • various patterns for engraved rolls have been developed for functional as well as aesthetic reasons.
  • the multilayer laminates are pattern bonded such that the bonded area comprises less than 50% of the fabric surface area and still more desirably the bonded area comprises between about 5% and about 30% of the fabric surface area.
  • Exemplary bond patterns and/or bonding processes suitable for use with the present invention include, but are not limited to, those described in US Patent No. 4,374,888 to Bornslaeger, US Patent No. 3,855,046 to Hansen et al., US Patent No. 5,635,134 to Bourne et al. and PCT Application US94/03412 (publication no. WO95/09261).
  • the fabrics of the present invention are well suited for use in a variety of end uses and applications including, but not limited to, use as or in medical fabrics, personal care products, protective fabrics, sorbents, wipes and so forth.
  • the fabrics of the present invention are particularly well suited for use in surgical gowns, surgical drapes, tarpaulins and other liquid barrier fabrics.
  • the alcohol repellency rating can be determined by placing drops of the isopropyl alcohol (IPA)/water solutions on the fabric surface.
  • the solutions can contain increments of 5% by volume IPA in water, from 20% to 100% IPA. As the level of IPA in the solution is increased, the surface tension is decreased. Thus, solutions having higher levels of IPA are more difficult to repel. Eight drops of each solution are placed along the cross-machine direction of the fabrics and after five minutes the repellency rating is obtained.
  • the repellency rating is the solution with the highest % IPA that, by observing the back of the fabric, is not drawn into and passed through the fabric. A fabric is considered to have failed a particular level when one of the drops wets out.
  • Both the monocomponent and multicomponent fibers have a solid round cross-section.
  • the polymeric compounds were melted and the respective molten polymer streams were separately directed through the die apparatus until just prior to the die capillary entrance.
  • the molten polymer streams were directed into the die in order to form fibers having an A/B/A cross-sectional configuration similar to that depicted in FIG. 1 and wherein the B component comprised approximately 50% by volume of the fiber cross-section.
  • the melt temperature was 282°C and the primary draw air was also at 282°C.
  • the active agent for imparting alcohol repellency was pre-compounded with the resins prior to melt-processing. For purposes of the data described herein below, the alcohol repellency rating tests was performed using only 10% increments (20%, 30%, 40%, etc.).
  • Example 1 A multicomponent fiber meltblown nonwoven web was formed having a basis weight of about 17 g/m 2 and an average fiber diameter of from 3-5 micrometers.
  • the A component comprised a mixture of 1% by weight of an alcohol repellency agent (a fluorochemical available under the trade designation FX-1801 from 3M), 8.3% polybutylene (DP-8911 available from Montell) and 90.7% polypropylene (3746G available from Exxon Chemical Company).
  • the B component comprised about 15% polybutylene (DP-8911 available from Montell) and about 85% polypropylene (3746G available from Exxon Chemical Company).
  • Example 2 A multicomponent fiber meltblown nonwoven web was formed having a basis weight of 17 g/m 2 and an average fiber diameter of 3-5 micrometers.
  • the A component comprised a mixture of 1% by weight of an alcohol repellency agent (a fluorochemical available under the trade designation FX-1801 from 3M), 2.1% pigment, 8.3% polybutylene (DP-8911 available from Montell) and 88.6% polypropylene (3746G available from Exxon Chemical Company).
  • the B component comprised 0.5% by weight of a fluorochemical (FX-1801 available from 3M), 2.1% pigment, 8.3% polybutylene (DP-8911 available from Montell) and 89.1% polypropylene (3746G available from Exxon Chemical Company).
  • Example 3 A multicomponent fiber meltblown nonwoven web was formed having a basis weight of 17 g/m 2 and an average fiber diameter of 3-5 micrometers.
  • the A component comprised a mixture of 1% by weight of an alcohol repellency agent (a fluorochemical available under the trade designation FX-1801 from 3M), 2.1% pigment, 8.3% polybutylene (DP-8911 available from Montell) and 88.6% polypropylene (3746G available from Exxon Chemical Company).
  • the B component comprised 0.25% by weight of a fluorochemical (FX-1801 available from 3M), 2.1 % pigment, 8.3% polybutylene (DP-8911 available from Montell) and 89.3% polypropylene (3746G available from Exxon Chemical Company).
  • Example 4 A multicomponent fiber meltblown nonwoven web was formed having a basis weight of 17 g/m 2 and an average fiber diameter of 3-5 micrometers.
  • the A component comprised a mixture of 1% by weight of an alcohol repellency agent (a fluorochemical available under the trade designation FX-1801 from 3M), 2.1% pigment, 8.3% polybutylene (DP-8911 available from Exxon Chemical Company) and 88.6% polypropylene (3746G available from Exxon Chemical Company).
  • the B component comprised 2.1% pigment, 8.3% polybutylene (DP-8911 available from Montell) and 89.6% polypropylene (3746G available from Exxon Chemical company).
  • Comparative Example 1 A monocomponent fiber meltblown nonwoven web was formed having a basis weight of 17 g/m 2 and an average fiber diameter of 3-5 micrometers.
  • the fibers comprised 2.1% pigment, 7.9% polybutylene (DP-8911 available from Montell) and 90% polypropylene (3746G available from Exxon Chemical Company).
  • Comparative Example 2 A monocomponent fiber meltblown nonwoven web was formed having a basis weight of 17 g/m 2 and an average fiber diameter of 3-5 micrometers.
  • the fibers comprised 1% by weight alcohol repellency agent (a fluorochemical available under the trade designation FX-1801 from 3M), 2.1 % pigment, 7.9% polybutylene (DP-8911 available from Montell) and 89% polypropylene (3746G available from Exxon Chemical Company).
  • alcohol repellency agent a fluorochemical available under the trade designation FX-1801 from 3M
  • DP-8911 available from Montell
  • polypropylene 3746G available from Exxon Chemical Company
  • a fabric can be obtained having a low level of active agent that provides excellent liquid repellency despite having little or no active agent within all of the components exposed upon the outer surface of the fibers. Further, the alcohol repellency rating is comparable to fabrics comprising fibers having active agent distributed within all components forming the outer surface of the fiber.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Multicomponent Fibers (AREA)

Abstract

La présente invention concerne des nappes de non-tissé à base de fibres multi-composants. Ces tissus se distinguent par leur excellente aptitude à traiter et/ou repousser les liquides. En l'occurrence, l'extérieur de ces fibres polymères thermoplastiques multi-composants fait apparaître des premiers et seconds composants qui forment la surface externe des fibres multi-composants, et qui recouvrent de façon sensiblement continue toute la longueur des fibres. Le premier composant comprend un polymère thermoplastique et un agent, tel qu'un agent repoussant les liquides. Le second composant, qui comprend un polymère thermoplastique et renferme pour 100% à 50% de sa masse un agent moins actif que le premier composant.
PCT/US2001/023938 2000-07-31 2001-07-31 Tissus aux caractéristiques de surface modifiées WO2002009491A2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2002515060A JP2004505180A (ja) 2000-07-31 2001-07-31 変成された表面特性を有する布
AU2001279092A AU2001279092A1 (en) 2000-07-31 2001-07-31 Fabrics having modified surface properties
KR10-2003-7001472A KR20030022344A (ko) 2000-07-31 2001-07-31 개질된 표면 특성을 가진 직물
MXPA03000469A MXPA03000469A (es) 2000-07-31 2001-07-31 Telas que tienen propiedades de superficie modificadas.
EP01957336A EP1307612A2 (fr) 2000-07-31 2001-07-31 Tissus aux caracteristiques de surface modifiees
BR0112808-6A BR0112808A (pt) 2000-07-31 2001-07-31 Tecidos com propriedades de superfìcie modificadas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63002800A 2000-07-31 2000-07-31
US09/630,028 2000-07-31

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WO2002009491A2 true WO2002009491A2 (fr) 2002-02-07
WO2002009491A3 WO2002009491A3 (fr) 2002-08-08

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JP (1) JP2004505180A (fr)
KR (1) KR20030022344A (fr)
CN (1) CN1449463A (fr)
AU (1) AU2001279092A1 (fr)
BR (1) BR0112808A (fr)
MX (1) MXPA03000469A (fr)
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Cited By (13)

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WO2004003292A2 (fr) * 2002-07-01 2004-01-08 Kimberly-Clark Worldwide, Inc. Materiau de protection non tisse anti-mouillant
WO2004060613A1 (fr) * 2002-12-17 2004-07-22 Kimberly-Clark Worldwide, Inc. Produit fuse-souffle de nettoyage
WO2007070094A2 (fr) * 2005-12-14 2007-06-21 Kimberly-Clark Worldwide, Inc. Article protecteur et therapeutique
KR100876563B1 (ko) * 2004-06-30 2008-12-31 퀄컴 인코포레이티드 무선 디바이스에 부착된 단말기 장비에 대한 ｉｐ의 동적구성
US7626073B2 (en) 2004-02-11 2009-12-01 The Procter & Gamble Co. Hydrophobic surface coated absorbent articles and associated methods
US7799968B2 (en) 2001-12-21 2010-09-21 Kimberly-Clark Worldwide, Inc. Sponge-like pad comprising paper layers and method of manufacture
CN101864604A (zh) * 2009-04-15 2010-10-20 东丽纤维研究所（中国）有限公司 一种双组分纤维及其生产方法
WO2010149239A1 (fr) * 2009-06-25 2010-12-29 Fibertex A/S Non-tissé à effet haute barrière
EP2665456B1 (fr) 2011-01-19 2016-05-18 The Procter and Gamble Company Procédé de production d'une couche centrale absorbante d'un article absorbant
US10271999B2 (en) 2014-11-06 2019-04-30 The Procter & Gamble Company Crimped fiber spunbond nonwoven webs/laminate
US11090407B2 (en) 2017-03-09 2021-08-17 The Procter & Gamble Company Thermoplastic polymeric materials with heat activatable compositions
US11110013B2 (en) 2014-09-10 2021-09-07 The Procter & Gamble Company Nonwoven webs with hydrophobic and hydrophilic layers
US11339514B2 (en) 2011-05-20 2022-05-24 The Procter & Gamble Company Fibers of polymer-wax compositions

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ES2415858T3 (es) * 2006-02-03 2013-07-29 The University Of Akron Esteras fibrosas absorbentes no tejidas y proceso para preparar las mismas
CN102908827B (zh) * 2012-10-30 2014-06-18 厦门柏润氟材料科技有限公司 一种具有皮芯结构的复合过滤材料及其制备方法与应用
CN102908824B (zh) * 2012-10-30 2014-06-18 厦门柏润氟材料科技有限公司 一种聚酰亚胺玻璃纤维复合过滤材料及其制备方法与应用
CN103696147B (zh) * 2013-12-23 2015-10-28 龚霞红 正面拒酒精拒水、反面亲水sms非织造布的生产方法

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US5718972A (en) * 1992-10-05 1998-02-17 Unitika, Ltd. Nonwoven fabric made of fine denier filaments and a production method thereof
WO1998023804A1 (fr) * 1996-11-26 1998-06-04 Kimberly-Clark Worldwide, Inc. Tissus non tisses entremeles et leurs procedes de production

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US5718972A (en) * 1992-10-05 1998-02-17 Unitika, Ltd. Nonwoven fabric made of fine denier filaments and a production method thereof
US5534339A (en) * 1994-02-25 1996-07-09 Kimberly-Clark Corporation Polyolefin-polyamide conjugate fiber web
WO1998023804A1 (fr) * 1996-11-26 1998-06-04 Kimberly-Clark Worldwide, Inc. Tissus non tisses entremeles et leurs procedes de production

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7799968B2 (en) 2001-12-21 2010-09-21 Kimberly-Clark Worldwide, Inc. Sponge-like pad comprising paper layers and method of manufacture
WO2004003292A3 (fr) * 2002-07-01 2004-04-01 Kimberly Clark Co Materiau de protection non tisse anti-mouillant
WO2004003292A2 (fr) * 2002-07-01 2004-01-08 Kimberly-Clark Worldwide, Inc. Materiau de protection non tisse anti-mouillant
US7994079B2 (en) 2002-12-17 2011-08-09 Kimberly-Clark Worldwide, Inc. Meltblown scrubbing product
WO2004060613A1 (fr) * 2002-12-17 2004-07-22 Kimberly-Clark Worldwide, Inc. Produit fuse-souffle de nettoyage
US7626073B2 (en) 2004-02-11 2009-12-01 The Procter & Gamble Co. Hydrophobic surface coated absorbent articles and associated methods
US8097767B2 (en) 2004-02-11 2012-01-17 The Procter & Gamble Company Hydrophobic surface coated absorbent articles and associated methods
KR100876563B1 (ko) * 2004-06-30 2008-12-31 퀄컴 인코포레이티드 무선 디바이스에 부착된 단말기 장비에 대한 ｉｐ의 동적구성
WO2007070094A2 (fr) * 2005-12-14 2007-06-21 Kimberly-Clark Worldwide, Inc. Article protecteur et therapeutique
WO2007070094A3 (fr) * 2005-12-14 2007-11-22 Kimberly Clark Co Article protecteur et therapeutique
CN101864604A (zh) * 2009-04-15 2010-10-20 东丽纤维研究所（中国）有限公司 一种双组分纤维及其生产方法
EP2270271A1 (fr) * 2009-06-25 2011-01-05 Fibertex A/S Barrière haute non tissée
WO2010149239A1 (fr) * 2009-06-25 2010-12-29 Fibertex A/S Non-tissé à effet haute barrière
EP2665456B1 (fr) 2011-01-19 2016-05-18 The Procter and Gamble Company Procédé de production d'une couche centrale absorbante d'un article absorbant
EP2665456B2 (fr) † 2011-01-19 2023-05-10 The Procter & Gamble Company Procédé de production d'une couche centrale absorbante d'un article absorbant
US11339514B2 (en) 2011-05-20 2022-05-24 The Procter & Gamble Company Fibers of polymer-wax compositions
US11110013B2 (en) 2014-09-10 2021-09-07 The Procter & Gamble Company Nonwoven webs with hydrophobic and hydrophilic layers
US11839531B2 (en) 2014-09-10 2023-12-12 The Procter And Gamble Company Nonwoven webs with hydrophobic and hydrophilic layers
US10271999B2 (en) 2014-11-06 2019-04-30 The Procter & Gamble Company Crimped fiber spunbond nonwoven webs/laminate
US11090407B2 (en) 2017-03-09 2021-08-17 The Procter & Gamble Company Thermoplastic polymeric materials with heat activatable compositions

Also Published As

Publication number Publication date
MXPA03000469A (es) 2003-06-06
AU2001279092A1 (en) 2002-02-13
CN1449463A (zh) 2003-10-15
ZA200210205B (en) 2003-12-17
JP2004505180A (ja) 2004-02-19
WO2002009491A3 (fr) 2002-08-08
BR0112808A (pt) 2004-01-13
KR20030022344A (ko) 2003-03-15
EP1307612A2 (fr) 2003-05-07

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