EP0767263B1 - Hydrophiler Vliesstoff auf Basis von Polylactiden - Google Patents

Hydrophiler Vliesstoff auf Basis von Polylactiden Download PDF

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Publication number
EP0767263B1
EP0767263B1 EP96470017A EP96470017A EP0767263B1 EP 0767263 B1 EP0767263 B1 EP 0767263B1 EP 96470017 A EP96470017 A EP 96470017A EP 96470017 A EP96470017 A EP 96470017A EP 0767263 B1 EP0767263 B1 EP 0767263B1
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EP
European Patent Office
Prior art keywords
filaments
woven fabric
polymer
polymers
derived
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Expired - Lifetime
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EP96470017A
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English (en)
French (fr)
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EP0767263A1 (de
Inventor
Philippe Ehret
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Fiberweb France SAS
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Fiberweb France SAS
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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
    • D04H3/08—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
    • 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
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • 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
    • D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
    • D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
    • D01F11/08—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/009—Condensation or reaction polymers
    • D04H3/011—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
    • 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
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • 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.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2484—Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting
    • 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.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2484—Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting
    • Y10T442/2492—Polyether group containing
    • 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.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric

Definitions

  • the invention relates to a hydrophilic nonwoven and methods of obtaining it.
  • this invention relates to the production of a nonwoven based on of polyactide having hydrophilic properties and allowing its use in personal hygiene items (i.e. baby diapers), in the medical sector (i.e. fields), in agriculture (mulching) and other traditional applications of nonwovens hydrophilic.
  • degradable polymers more specifically polymers biodegradable, such as polymers based on lactic acids (abbreviated: PLA) is a solution to these problems.
  • PLA polymers based on lactic acids
  • PLA polymers mentioned (especially PLA) are well known. in the medical field. They were used as raw material for sutures, for various kinds of implants (screws, rods, plates, tubes) and for different controlled diffusion systems.
  • PLA is one of the most promising.
  • PLA provides mechanical and physiocochemical properties which are comparable to those of polymers conventional.
  • polymers based on PLA use renewable resources such as sugar beet, corn or whey. For for this reason, the production of these polymers does not disturb the equilibrium of global carbon (greenhouse effect). Composting or incinerating PLA releases the same amount of carbon dioxide than that generated during its production.
  • the incineration of polyolefin waste is relatively expensive because it generates too much heat and that it requires cooling using other materials mixed with the waste.
  • Through PLA contains 60% less energy than polypropylene or polyethylene, which allows better temperature control during incineration.
  • PLA-based polymer uses resources renewable.
  • PLA-based nonwovens such as nonwovens based on PP, are naturally hydrophobic. Hydrophilicity can be obtained by surface treatment of the nonwoven or by injection into the extruder with the products traditionally used for polypropylene nonwovens.
  • the surface treatment of PLA-based nonwovens has posed a problem for the plaintiff because it is done using aqueous solutions either by licking or by spraying or applying foam.
  • this treatment involves a certain level of critical humidity during and after treatment (in fact degradation is generated by hydrolysis) which must be checked before packaging the nonwoven and its expedition.
  • the invention relates to obtaining biodegradable nonwovens based on polylactides with permanent hydrophilicity.
  • the invention relates to a nonwoven based on filaments of thermoplastic material, characterized in that "all the filaments which make up are totally made from an 'acid-derived polymer lactic, said nonwoven having been treated with a “polyether-silicone copolymer imparting permanent hydrophilicity ”.
  • polylactides like all polyethers, polylactides have a hydrophilic character or more precisely, an affinity for water which results in a simple recovery 2 to 3% humidity as soon as the fiber is in the open air.
  • the hydrophilicity sought for the applications is such that the products must be treated with hydrophilic agents to give the fiber this hydrophilic capacity which it does not present by itself.
  • the raw material used in the invention comprises polymers based on the PLA comprising poly (L-lactic acid) (PLLA) or poly (D-lactic acid) (PDLA), or poly (D-L-lactic acid) co-polymers, with a D-L ratio varying from 0% 100%, or mixtures of the polymers mentioned.
  • PLA poly (L-lactic acid)
  • PDLA poly (D-lactic acid)
  • D-L-lactic acid) co-polymers with a D-L ratio varying from 0% 100%, or mixtures of the polymers mentioned.
  • These polymers based on PLA forming this raw material can also contain 0.1% to 15% of plasticizer and / or 0.1% to 5% of monomers and / or 0.001% to 5% of different kinds of stabilizers, pigments, etc.
  • the nonwoven is made of continuous fibers or filaments preferably between 0.1 and 100 ⁇ m in diameter.
  • This nonwoven can be obtained by various methods, for example by both continuous spinning processes (Lurgi, S-tex) or melt-blown (called melt blown) and described below. If a hydrophilic treatment is added to it, it will be carried out either by licking, either by spraying or by application of foam, or by injection into the extruder of surfactants.
  • FIG. 1 shows an overview of the direct spinning process continuous (i.e. Stex) comprising a hopper (1a) for raw material, an extruder (2a), a screw (2'a), a die (3a), a mat (4a), a grille (5a), a system of web guide (6a) and winding tension adjustment, a winding (7a), a fiber cooling system (8a), a drawing slot (11a), a suction of stretching (11'a).
  • Stex direct spinning process continuous
  • the polymer is melted and is extruded using an extruder single or twin screw (2.2a) at a temperature which is preferably between 140 and 280 ° C and is routed to a spinning pump before passing through a filter up to a die with holes varying from 0.2 to 2.0 mm, preferably from 0.4 to 1.0 mm.
  • the polymer is spun through the die (3a) until the installation of cooling (8) and drawing (11). Cooling can be done by air cooled, to a temperature preferably varying between 0 and 40 ° C and the speed varying from 0.1 at 5 m / s, stretching can be done by aspiration of air or air forced through the system stretching.
  • the stretching system can comprise a slot (11) or can be constituted by a series of tubes or slots.
  • the drawing air speed is preferably between 10 and 400 m / s.
  • the fibers obtained have a decreasing diameter and a oriented structure.
  • the draw ratio is generally from 1.1 to 20, preferably from 2 to 15.
  • the titer of the fibers is preferably between 0.5 and 20 dtex, more particularly from 1 to 10 dtex.
  • the spinning system is followed by a system which randomly layers the fibers on the carpet.
  • the carpet routes the sheet of fibers to a calender (5) heated to a temperature preferably varying from 40 to 160 ° C., more particularly from 60 to 110 ° C.
  • Another slot can be installed before the grille in order to obtain a structured nonwoven of several similar or different layers.
  • the basic weight can be adjusted according to the speed. It is generally between 5-200 g / m 2 , depending on the application.
  • the diagram in Figure 2 represents the MB process: a raw material hopper (1b), an extruder (2b), a die (3b), a training mat (4b), a calender (5b), a winder (6b), a blowing (9b), a suction (11b).
  • the MB process includes an extruder for melting the polymer.
  • the extrusion temperatures are preferably between 150 ° C and 280 ° C.
  • the polymer is conveyed from the extruder to the die.
  • the die has only one row of holes. The holes have a diameter of 0? 2 to 2 mm.
  • the base weight of the mat MB is adjusted as a function of the speed of the mat and is preferably between 5 and 100 g / m 2 .
  • the fiber diameter is normally between 0.1 and 20 ⁇ m, preferably between 0.5 and 10 ⁇ m.
  • the hydrophilic treatment is carried out using surfactants such as silicone-polyether copolymers (i.e. Silwet (registered trademark) 12037 or Nuwet (registered trademark) 500 from OSI Specialties, 4 Place des Maschinen-Unis, Silic 220, 94518 Rungis Cedex).
  • surfactants such as silicone-polyether copolymers (i.e. Silwet (registered trademark) 12037 or Nuwet (registered trademark) 500 from OSI Specialties, 4 Place des Maschinen-Unis, Silic 220, 94518 Rungis Cedex).
  • silicone-polyether copolymers i.e. Silwet (registered trademark) 12037 or Nuwet (registered trademark) 500 from OSI Specialties, 4 Place des Maschinen-Unis, Silic 220, 94518 Rungis Cedex.
  • Silwet registered trademark
  • Nuwet registered trademark 500 from OSI Specialties, 4 Place des Maschinen-Unis, Silic 220, 94518 Rungis
  • the surfactant can be deposited on the sheet in the form of foam.
  • the foam after stabilization, has a lower viscosity than the solution previously used and the amount of surfactant is lower than in the solution. So it's more easy to precisely dose.
  • Figure 4 describes the system diagram for the application of foam: a containing solution (15), a foam-forming pump (16), a nozzle spraying the foam (17), the nonwoven (18).
  • the level of foaming additive is normally between 0.1% and 5%.
  • the use and dose of foaming additive depends on the surfactant.
  • Another method for treating the web with a surfactant is the spraying, the solution being sprayed on the surface of the sheet with compressed air.
  • the last method consists either in injecting the surfactant directly into the main extruder, or to integrate a masterbatch (PLA and surfactant) into the main extruder, i.e., for surfactants with a low composition point, incorporate it using a side extruder.
  • a masterbatch PLA and surfactant
  • the water level of the water table must be checked after treatment with surfactant and, if necessary, the web should be dried.
  • the first stage of degradation of a PLA-based polymer being hydrolysis, the degradation by hydrolysis begins at the packaging stage in the case of a nonwoven having a certain humidity.
  • a continuous filament nonwoven fabricated according to the Stex process having a weight of 20 g / m 2 and filaments of 2.1 dtex is used as a surface fleece for baby diapers.
  • the strike-through urine values (EDANA test 150.1-90- are between 10 and 15 s, the urine return (rewet) at approximately 0.6 g (EDANA 151.1-92).
  • Silwet registered trademark
  • 7602 the passage of urine is between 2.5 and 3.0 s and the return of urine between 0.8 and 1.0 g.
  • the penetration values under inclined plane ( run-off) are less than 1% These results are remarkable.With polypropylene nonwovens, the values are, after two texts, 25 s, 2.0 g and 100% respectively.
  • a continuous filament nonwoven fabricated according to the Stex process having a weight of 19 g / m 2 and filaments of 3.2 dtex has urine passage time values of 11 s. and 0.7 g of urine return.
  • the treated tablecloth After foam treatment with a 10% solution of Nuwet (brand deposited) 500, the treated tablecloth has values of 2.5 s. for passing urine, 4 g for the return of urine, 3.5 s, for the passage of urine after three repetitive tests.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Artificial Filaments (AREA)
  • Woven Fabrics (AREA)
  • Polyesters Or Polycarbonates (AREA)

Claims (13)

  1. Textilverbundware auf der Grundlage von Fasern aus thermoplastischen Materialien, dadurch gekennzeichnet, dass alle die Ware bildenden Fasern vollständig auf der Basis eines von Milchsäure abstammenden Polymers hergestellt sind, wobei die Textilverbundware mit einem Polyether-Silikon-Copolymer behandelt ist, welches ihr eine andauernde hydrophile Charakteristik verleiht.
  2. Textilverbundware nach Anspruch 1, dadurch gekennzeichnet, dass die die Ware bildenden Fasern kontinuierliche Fasern sind.
  3. Textilverbundware nach Anspruch 1, dadurch gekennzeichnet, dass die Fasern einen Durchmesser zwischen einschließlich 0,1 und 100µm aufweisen.
  4. Textilverbundware nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Polymer oder die Polymere, auf dessen beziehungsweise deren Basis die Fasern hergestellt ist beziehungsweise sind, von Milchsäure des Typs L oder D abstammt beziehungsweise abstammen.
  5. Textilverbundware nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Polymer oder die Polymere, auf dessen beziehungsweise deren Basis die Fasern hergestellt ist beziehungsweise sind, von Milchsäuren des Typs L und D (Copolymer) abstammen.
  6. Textilverbundware nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Polymer oder die Polymere, auf dessen beziehungsweise deren Basis die Fasern hergestellt ist beziehungsweise sind, von einem Gemisch von Milchsäuren des Typs L und D abstammen.
  7. Textilverbundware nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sie weiterhin wenigstens einen der Bestandteile aus der Gruppe von 0,1% bis 15% Weichmacher, 0,1% bis 5% Monomer, 0,01% bis 5% Stabilisatoren, Pigmente aufweist.
  8. Verfahren zur Herstellung einer Textilverbundware auf der Grundlage von Fasern aus thermoplastischen Materialien gemäß einem der Ansprüche 1 bis 7, bei dem die Faser oder die kontinuierlichen Fasern aus thermoplastischen Materialien gemäß einem Verfahren aus der Gruppe von kontinuierlicher Faserherstellung - Schmelz-Ausblas-Verfahren hergestellt ist beziehungsweise sind, dadurch gekennzeichnet, dass die andauernde hydrophile Charakteristik durch ein Verfahren aus der Gruppe von Benetzungsverfahren, Pulverisation, Schaumanwendung oder Injektion eines Polyesther-Silikon-Copolymers realisiert wird.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass die Fasern durch ein direktes Ziehen von Fasern hergestellt sind, das vorzugsweise die nachfolgenden Schritte umfaßt: Extrusion bei einer Temperatur zwischen einschließlich 140 und 280°C, Durchlauf einer Spinndüseneinheit, deren Löcher einen Durchmesser von einschließlich zwischen 0,2 und 2 mm aufweisen, Abkühlung bei einer Geschwindigkeit zwischen 0,1 bis 5 m/s, Strecken zwischen 10 und 4000 m:S.
  10. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass die Fasern durch Schmelzen-Ausblasen hergestellt sind, das vorzugsweise die nachfolgenden Schritte umfaßt: Extrusion zwischen 150 und 280°C, Durchlauf einer Spinndüseneinheit, deren Löcher einen Durchmesser zwischen 0,1 bis 2 mm aufweisen.
  11. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Benetzungsverfahren einen oberflächenaktiven Stoff verwendet, der mit einer Konzentration von 5 bis 25% in Wasser gelöst ist.
  12. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass die Schaumanwendung ein Schäummittel verwendet, dessen Wirkverhältnis zwischen 0,1% und 5% liegt.
  13. Verfahren nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass es eine Überwachung der Feuchtigkeit vor und nach der Behandlung und vor der Konditionierung umfaßt.
EP96470017A 1995-10-06 1996-09-10 Hydrophiler Vliesstoff auf Basis von Polylactiden Expired - Lifetime EP0767263B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9511957A FR2739632B1 (fr) 1995-10-06 1995-10-06 Non-tisse hydrophile a base de polylactides
FR9511957 1995-10-06

Publications (2)

Publication Number Publication Date
EP0767263A1 EP0767263A1 (de) 1997-04-09
EP0767263B1 true EP0767263B1 (de) 2000-05-10

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EP96470017A Expired - Lifetime EP0767263B1 (de) 1995-10-06 1996-09-10 Hydrophiler Vliesstoff auf Basis von Polylactiden

Country Status (7)

Country Link
US (1) US5910368A (de)
EP (1) EP0767263B1 (de)
JP (1) JPH09176950A (de)
AT (1) ATE192787T1 (de)
CA (1) CA2187105A1 (de)
DE (1) DE69608199T2 (de)
FR (1) FR2739632B1 (de)

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US7994078B2 (en) * 2002-12-23 2011-08-09 Kimberly-Clark Worldwide, Inc. High strength nonwoven web from a biodegradable aliphatic polyester
US20040121680A1 (en) * 2002-12-23 2004-06-24 Kimberly-Clark Worldwide, Inc. Compositions and methods for treating lofty nonwoven substrates
US8395016B2 (en) 2003-06-30 2013-03-12 The Procter & Gamble Company Articles containing nanofibers produced from low melt flow rate polymers
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US7264641B2 (en) * 2003-11-10 2007-09-04 Cabot Microelectronics Corporation Polishing pad comprising biodegradable polymer
US20050101228A1 (en) * 2003-11-10 2005-05-12 Cabot Microelectronics Corporation Polishing pad comprising biodegradable polymer
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CA2187105A1 (fr) 1997-04-07
FR2739632A1 (fr) 1997-04-11
EP0767263A1 (de) 1997-04-09
DE69608199T2 (de) 2001-02-01
US5910368A (en) 1999-06-08
FR2739632B1 (fr) 1997-11-07
JPH09176950A (ja) 1997-07-08
DE69608199D1 (de) 2000-06-15
ATE192787T1 (de) 2000-05-15

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