EP2573243B1 - Non-tissé doté de filaments élémentaires contenant une matrice - Google Patents

Non-tissé doté de filaments élémentaires contenant une matrice Download PDF

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Publication number
EP2573243B1
EP2573243B1 EP11007649.4A EP11007649A EP2573243B1 EP 2573243 B1 EP2573243 B1 EP 2573243B1 EP 11007649 A EP11007649 A EP 11007649A EP 2573243 B1 EP2573243 B1 EP 2573243B1
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EP
European Patent Office
Prior art keywords
polymer
woven fabric
fabric according
weight
nonwoven fabric
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EP11007649.4A
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German (de)
English (en)
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EP2573243A1 (fr
Inventor
Peter Dr. Rutsch
Matthias Goettel
Martin Buechsel
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Carl Freudenberg KG
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Carl Freudenberg KG
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Priority to EP11007649.4A priority Critical patent/EP2573243B1/fr
Priority to EP12765995.1A priority patent/EP2758580B1/fr
Priority to PCT/EP2012/003804 priority patent/WO2013041193A1/fr
Priority to EP12006446.4A priority patent/EP2573244B1/fr
Publication of EP2573243A1 publication Critical patent/EP2573243A1/fr
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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
    • D04H3/14—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
    • 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
    • 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
    • D04H3/153—Mixed yarns or filaments

Definitions

  • the present invention relates to the field of textile products and their applications.
  • the invention relates to a process for producing a nonwoven fabric comprising at least two polymers, wherein the melting point of at least one first polymer is above the melting point of at least one second polymer, by pressurizing and temperature applying multicomponent fibers containing at least two polymers, so that at least one first polymer is distributed in the form of elementary segments in a matrix of at least one second polymer.
  • the invention further relates to a nonwoven fabric produced by the method according to the invention, as well as the use of this nonwoven fabric for producing a composite material.
  • the conventional field of application of nonwovens is to be extended by imparting to them physical, in particular mechanical, features and properties which are similar to those of paper or films, wherein the advantageous properties and properties of nonwovens of endless segments are maintained.
  • Nonwovens are textile fabrics made of individual fibers and can be obtained by a variety of manufacturing processes, such as carding (dry laid), melt spinning (meltbonding) or aerodynamic nonwoven laying (air laying).
  • melt spinning a polymeric substance is heated in an extruder and forced through a spinneret by spinning pumps.
  • the polymer exits the die plate as a filament (continuous filament) in molten form, is cooled by a stream of air and stretched from the melt.
  • the air stream conveys the endless filaments onto a conveyor belt, which is designed as a sieve.
  • the threads can be fixed to form a fiber fabric.
  • the solidification of the fiber fabric can be done by heated rollers (calender), by a vapor stream or by mechanical or chemical bonding. When solidified by calender, one of the two rolls may be engraved, which may consist of dots, short rectangles or diamond-like surfaces.
  • Nonwovens are used for a variety of purposes. Nonwoven fabrics with high strength can be used alone or as a reinforcing layer in fiber composites. In the packaging field, single-layer constructions are usually made using meltblown or meltblown-like material structures, i. Fiber structures from only one domain used (see Tyvek®).
  • a method for producing a nonwoven fabric in which bicomponent fibers having an outer and an inner Fiber component, produced by a spinning process.
  • the outer fiber component wraps around the inner fiber component and has a higher elongation at break and a lower melting temperature than the inner fiber component.
  • the bicomponent fibers are positioned on a conveyor belt and solidified to a nonwoven fabric under the action of heat.
  • the nonwovens are used to make times, awnings, parachutes and packaging materials.
  • Other methods for producing a nonwoven fabric are in the US 2005/039836 disclosed.
  • the invention had the object of providing a process for producing a nonwoven fabric with paper or foil-like features, in particular with a high flexural rigidity and low static friction.
  • the nonwovens should also have a dense structure and low porosity.
  • the method according to the invention is characterized in that multicomponent fibers are bonded so extensively by applying a pressure of at least 40 N / mm and at a temperature of at least 100 ° C., that at least one first polymer in the form of elementary segments in a matrix of at least one second polymer is distributed.
  • a nonwoven fabric having a high flexural rigidity, a low stiction and a dense structure at low porosity can be obtained.
  • the nonwoven fabric according to the invention can have high strength and water impermeability at low weight. This allows easy processing and handling.
  • the nonwoven fabric produced by the process according to the invention is characterized in that it comprises a polymer matrix.
  • the nonwoven fabric may have a film-like character over the fused domains, but without the weaknesses of a film or paper. So it is possible in a simple way the surface of the Nonwoven fabric smooth and wet-strength design. Such a nonwoven fabric may be considered a "fiber reinforced film”.
  • the method according to the invention makes it possible to use energy-intensive mechanical solidification technologies, e.g. Hydroentanglement, to dispense.
  • the nonwoven fabrics produced by the method according to the invention are characterized by isotropic mechanical properties, such as an isotropic ratio of maximum tensile force or tensile force in machine to transverse direction, from. Isotropy in the sense of the invention designates the independence of a property from the direction, isotropic strength properties are advantageous in particular for the use of the nonwoven fabric as a reinforcing layer, since in this way a particularly uniform stabilization is achieved.
  • machine direction / transverse direction ratio of the maximum tensile force and / or tear propagation force in the context of the invention, it is understood that the machine direction / transverse direction ratio of the maximum tensile force and / or tearing force in the range of 0.7 to 1.6, preferably from 0.8 to 1.5, in particular from 0.9 to 1.1.
  • Maximum tensile force is the force that must be used to rupture a fiber layer.
  • tear propagation force is meant the force that is necessary to tear down an already cracked fiber layer or further tear. The higher these values are, the more stable a situation is.
  • the maximum tensile force is measured in the machine direction or transversely to the machine direction.
  • the machine direction is understood to mean the direction under which the fibers are deposited longitudinally on a conveyor belt moving in the longitudinal direction.
  • the direction transverse thereto or orthogonal thereto is the transverse direction.
  • the nonwoven fabric according to the invention is outstandingly suitable for the production of fiber composite materials, since its surface structure is e.g. can be easily adapted to the other composite components on the choice of polymers and by plasma or corona treatment of the surface. This allows a versatile use of composite components (film, foil, extrudate, etc.).
  • the multicomponent fibers can be prepared by methods known to those skilled in the art. Suitable processes are, in particular, melt-blown and spunbonding. Particularly preferred according to the invention is the melt spinning technology.
  • a polymeric substance can be heated under pressure in an extruder and pressed through a die to form endless filaments.
  • the continuous filaments may be drawn and positioned by means of dynamic laydown methods on a conveyor belt to form a quenched fiber layer.
  • the temperature at which the solidification of the multicomponent fibers takes place can vary within wide ranges and is expediently adapted to the respectively used polymer components in the multicomponent fiber. It is essential here that at the selected temperature and pressure, a substantially complete melting of the first polymer but not of the second polymer takes place.
  • the surface bonding of the multicomponent fibers is carried out by applying a temperature of 100 to 300 ° C, preferably from 100 to 250 ° C, more preferably from 110 to 200 ° C, in particular from 120 to 180 ° C.
  • rollers in particular calenders
  • rollers are expediently used.
  • rollers with a smooth or only slightly roughened surface are expediently used.
  • the surface has a surface roughness of 20 to 60 .mu.m, in particular from 30 to 45 .mu.m.
  • PIE fibers are preferably formed as continuous filaments and composed of at least two polymers.
  • PIE fibers are understood as meaning fibers of elementary segments which are arranged in the form of cake pieces or circular segments in cross section.
  • the effect of reflowing a PIE fiber is the incorporation of stable pie-shaped segments that function as reinforcing filaments in the polymer matrix. As a result, a stabilization is achieved in the manner of a reinforced concrete. In the case of PIE filaments in particular, a marked change in the geometry of the original filament structure is noticeable.
  • the cake-piece-shaped segments have a very small diameter in cross section and therefore the matrix can prevail particularly numerous.
  • the alternating arrangement of the individual core segments in the fibers causes a particularly homogeneous distribution of the various polymers. This leads to an extremely uniform melting with formation of the matrix.
  • the sheaths be made of the lower melting polymer.
  • the cores are embedded in the matrix polymer matrix in the form of stable circular segments.
  • the multicomponent fibers may comprise two or more polymers, provided that at least one polymer has a higher melting point than at least one further polymer. Practical experiments have shown that already with the use of two polymers (bicomponent fibers) nonwovens having a stable matrix structure can be obtained.
  • the basis weight of the nonwoven fabric according to the invention can vary within wide limits.
  • the choice of basis weight is made according to the requirements of the fiber composite.
  • the basis weight is usually from 30 g / m 2 to 400 g / m 2 , preferably from 35 g / m 2 to 200 g / m 2 , more preferably from 40 g / m 2 to 150 g / m 2 , in particular from 40 g / m 2 to 120 g / m 2 .
  • the surface energy of the nonwoven fabric by corona and / or Increase plasma treatment.
  • the plasma or corona treatment is preferably carried out in such a way that the surface is given a surface energy according to ISO 9000 of more than 38 dyn, preferably 38 to 70 dyn, in particular 40 to 60 dyn. It is advantageous that the surface can be made hydrophilic or hydrophobic, without adding chemicals. This is particularly advantageous in gropemah used products, such as clothing, advantage.
  • Conceivable is the antistatic finish of the surface, as well as its inspiration with care substances. Also conceivable is the subsequent finishing of the nonwoven fabric with hydrophilic, hydrophobic or antistatic spin finishes, as well as their provision with care substances. It is also conceivable additives for surface modification already in the continuous film production in an extruder to enter. Also in a dyeing no subsequent coloration is necessary because pigments can be introduced already in the continuous film production in an extruder.
  • the nonwoven fabric may be subjected to a chemical-type bonding or finishing such as an anti-pilling treatment, a hydrophilization, an antistatic treatment, a refractory improving treatment and / or a change in tactile properties or gloss, a treatment Mechanical type such as roughening, sanforizing, sanding or a treatment in the tumbler and / or a treatment to change the appearance such as dyeing or printing.
  • a chemical-type bonding or finishing such as an anti-pilling treatment, a hydrophilization, an antistatic treatment, a refractory improving treatment and / or a change in tactile properties or gloss
  • a treatment Mechanical type such as roughening, sanforizing, sanding or a treatment in the tumbler and / or a treatment to change the appearance such as dyeing or printing.
  • Another object of the invention is a nonwoven fabric formed as a base material for coating with films, which is produced by a method according to the invention.
  • the coating with films is preferably carried out by laminating and / or lamination of the base material, optionally under Use of a binder and / or pressure and / or temperature.
  • a binder and / or pressure and / or temperature are also conceivable.
  • Another object of the invention is a nonwoven fabric formed as a base material for impregnation or impregnation with binders. Suitable binders are in particular acrylates and aminoplasts.
  • the nonwoven fabric according to the invention is characterized by a high flexural rigidity with low static friction.
  • the nonwoven fabric of the invention is further distinguished by excellent strength properties.
  • the tear propagation force in the machine and / or transverse direction can be 10 N to 60 N, preferably 20 N to 50 N, in particular 30 N to 40 N.
  • the maximum tensile force in the machine and / or transverse direction can be 70 to 400 N / 50 mm, preferably 100 to 350 N / 50 mm, in particular 150 to 300 N / 50 mm.
  • the flexural strength according to DIN 53350 and the coefficient of static friction according to ASTM D-4918-97 (2002) are to be used in particular. Practical tests have shown that the nonwoven fabric according to the invention shows a high flexural rigidity with simultaneously high surface smoothness, ie low coefficient of friction.
  • the nonwoven fabric according to the invention may have a bending stiffness of 0.5 N / mm 2 to 10 N / mm 2 , measured according to DIN 53350 at a bending angle of 10%.
  • the nonwoven fabric according to the invention has a bending stiffness of 0.5 N / mm 2 to 8 N / mm 2 at a bending angle of 10%, more preferably from 1 N / mm 2 to 6 N / mm 2 , in particular 1 N / mm 2 up to 4 N / mm 2 .
  • the flexural stiffness information refers to a measurement in the longitudinal or transverse direction.
  • the nonwoven fabric according to the invention may have a bending stiffness of 1 N / mm 2 to 20 N / mm 2 , measured according to DIN 53350 at a bending angle of 40%.
  • the nonwoven fabric according to the invention has a bending stiffness of 3 N / mm 2 to 12 N / mm 2 at a bending angle of 40%, more preferably from 4 N / mm 2 to 12 N / mm 2 , in particular from 5 N / mm 2 to 10 N / mm 2 on.
  • the flexural stiffness information refers to a measurement in the longitudinal or transverse direction.
  • the nonwoven fabric of the present invention may have a coefficient of static friction, as measured by ASTM D-4918-97 (2002), tan ⁇ of 0.05 to 0.50, preferably 0.10 to 0.40, more preferably 0.10 to 0.30 ,
  • a particularly advantageous static friction coefficient can be achieved if polyethylene and / or polyamide is used to form the polymer matrix.
  • the nonwoven fabric according to the invention is characterized in that it comprises at least two polymers, wherein the melting point of at least one first polymer is above the melting point of at least one second polymer.
  • the first polymer is in the form of elemental segments distributed in a matrix of the second polymer.
  • the difference between the melting point of the first and second polymers can vary widely. Conveniently, the difference is at least 15 ° C, in particular at least 20 ° C. Preferably, polymers having a temperature difference of from 15 ° C to 450 ° C, more preferably from 15 ° C to 200 ° C, even more preferably from 20 ° C to 150 ° C, especially from 70 ° C to 150 ° C are used.
  • polymers a wide variety of materials can be used.
  • thermoplastic polymers in particular selected from the group consisting of nylon 6, nylon 6.6, nylon 6.10, nylon 6.11, nylon 6.12, polypropylene or polyethylene.
  • polymers are selected from the group consisting of polyester, polyamide, thermoplastic copolyetherester elastomers, polyolefins, polyacrylates and thermoplastic liquid crystals.
  • copolyetherester elastomers of long-chain and short-chain ester monomers are also conceivable. If elemental segments of polyethylene terephthalate are used, they can preferably be produced from recyclable polyethylene terephthalate
  • thermoplastic polymers polyamides, polyvinyl acetates, saponified polyvinyl acetates, saponified ethylene vinyl acetates and other hydrophilic polymers.
  • elastic polymers can also be used. These polymers are preferably selected from the group consisting of: styrene / butadiene copolymers, elastic polypropylene, polyethylene, metallocene-catalyzed ⁇ -olefin homopolymers, as well as copolymers having a density of less than 0.89 g / cm 3 .
  • styrene / butadiene copolymers preferably selected from the group consisting of: styrene / butadiene copolymers, elastic polypropylene, polyethylene, metallocene-catalyzed ⁇ -olefin homopolymers, as well as copolymers having a density of less than 0.89 g / cm 3 .
  • amorphous polyalphaolefins having a density of less than 0.89 g / cm 3 ethylene vinyl acetate, as well as ethylene-propylene rubber and propylene-1-butene copolymer and
  • the multicomponent fibers contain polypropylene, polyethylene, polyamide, Syndiotatkisches polystyrene, polyester, and / or mixtures of these polymers, preferably polyethylene terephthalate.
  • the first polymer is selected from the group consisting of: polyester, preferably polyethylene terephthalate and / or the second polymer selected from the group consisting of: polypropylene, polyethylene, polyamide and / or polyester, preferably polyethylene terephthalate.
  • the sheath or the sea is preferably formed from the second, matrix-producing polymer.
  • Preferred polymers for the matrix are polyethylene, linear low-pressure polyethylene having an ⁇ -olefin monomer content greater than 10% by weight, ethylene copolymer having at least one vinyl monomer or ethylene copolymer having unsaturated aliphatic carboxylic acids.
  • the nonwoven fabric produced by the process according to the invention is characterized in that a film-like molten polymer matrix is present in the nonwoven fabric.
  • This contains unmelted elementary segments, which may be circular-segment-shaped or cake-piece-shaped, multilobal or circular in cross-section.
  • nonwovens with a dense structure and low porosity manufacture which have a high strength and water impermeability with low weight.
  • the fiber titres of the multicomponent fibers independently of one another have values of from 1 dtex to 4 dtex, preferably from 1.5 to 3 dtex, more preferably from 2 dtex to 3 dtex.
  • the weight ratio of the first polymer to the second polymer in the nonwoven fabric can vary within wide limits, provided that it is ensured that the first polymer in the nonwoven fabric is in the form of elemental filaments which are distributed in a matrix of the second polymer.
  • the weight ratio of first polymer to second polymer in the nonwoven fabric is 50%: 50%, preferably 70% to 30%, more preferably 60% to 40%.
  • the proportion of the matrix in the nonwoven fabric from 1 wt .-% to 60 wt .-%, preferably from 5 wt .-% to 50 wt.%, In particular from 10 wt.% To 40 wt .-%.
  • a nonwoven fabric having a particularly good flexural strength can be obtained.
  • the nonwoven fabric according to the invention is outstandingly suitable for the production of packaging materials, bags, pouches, envelopes, in particular envelopes, tapes, banners, reinforcing layers, separating layers and / or insulating layers.
  • nonwoven fabric according to the invention as a base material for the treatment with impregnating agents, in particular binders, resins and / or polymer dispersions.
  • Another object of the invention is a composite material comprising at least a first layer containing a nonwoven fabric according to the invention, and at least one second layer, preferably formed as a film.
  • the second layer is formed as a film having a thickness of 0.01 mm to 1 mm, preferably from 0.05 mm to 0.5 mm, in particular from 0.1 mm to 0.2 mm.
  • the respective layers of the nonwoven fabric according to the invention can be bonded together in various ways depending on the materials used. Practical experiments have shown that particularly strong composites are obtained when the first and second layers are cohesively and / or bonded together by means of a binder.
  • composition of the film used according to the invention can vary within wide ranges, depending on the particular intended use of the composite material.
  • the film contains plastics, preferably polyolefins, in particular polyethylenes and / or polypropylene and / or their copolymers or metals. It is also conceivable to use a metallized film.
  • the thickness of the first layer may vary.
  • the first layer has a thickness of from 0.01 mm to 1 mm, more preferably from 0.05 mm to 0.5 mm, in particular from 0.1 mm to 0.2 mm.
  • polyethylene terephthalate and polyethylene are coextruded in a known manner with an average throughput of 0.65 g / L min and aerodynamically stretched.
  • the endless filaments are then dynamically deposited on a conveyor belt. Dynamic deposition is understood to mean that the orientation of the filaments to be deposited in the transverse direction can be influenced in a targeted manner. This is followed by solidification of the continuous filaments by a rough steel roller under pressure and heat. The steel roll has temperatures between 125 ° C and 132 ° C.
  • a spunbonded fabric having a basis weight of 80 g / m 2 is obtained.
  • the spunbonded fabric has a dense structure and a low porosity with characteristic mechanical values (maximum tensile strength (HZK), tear propagation force (WRK), machine direction (MD): transverse direction (CD) ratio).
  • HZK maximum tensile strength
  • WRK tear propagation force
  • MD machine direction
  • CD transverse direction
  • Table 1 Embodiment 1, 80 g / m ⁇ sup> 2 ⁇ / sup> PET / PE nonwoven fabric, core / sheath filaments, mech. Properties. Kalandertemp.
  • FIG. 1 is the film-like structure of the surface or the material structure of spun core-sheath filaments to recognize.
  • polyethylene domains partially reinforced by continuous polyethylene terephthalate filaments are present.
  • the air passage can be controlled in the range of 135 to 285 l / m 2 sec.
  • the round cross-section of the polyester core structure is essentially retained.
  • polyethylene domains which are reinforced with the Kemsegmenten before. This is particularly visible in the spunbonded nonwovens with a polyethylene content of 36% by weight in the jacket.
  • the specific fiber orientation results in typical isotropic machine direction / transverse direction ratios, as shown in Table 2.
  • Table 2 Embodiment 1, 80 g / m ⁇ sup> 2 ⁇ / sup> PET / PE nonwoven fabric, core / sheath filaments, mech. Properties. Kalandertemp.
  • FIG. 2 The cross section of commercially available flash spun polyethylene (Du Pont Tyvek®) can be seen. This shows only fibers of a single polymer in a different size and shape. To compare the surface energies, a commercially available packaging nonwoven made of flash spun polyethylene (Du Pont Tyvek®) was used.
  • polyethylene terephthalate and polyethylene are coextruded in a known manner with an average throughput of 0.65 g / L min and aerodynamically stretched to form core / sheath filaments.
  • the polyethylene content in the extrudate is 36 to 40 wt .-%.
  • the endless filaments are then dynamically deposited on a conveyor belt. Dynamic deposition is understood to mean that the orientation of the filaments to be deposited in the transverse direction can be influenced in a targeted manner. This is followed by solidification of the continuous filaments by a rough steel roller under pressure and heat.
  • the steel roller has temperatures between 128 ° C and 132 ° C at a line pressure of 80 N / mm (roughness of 40 microns) on.
  • the polyethylene terephthalate is in the form of elementary filaments in a matrix Polyethylene distributed.
  • This spunbonded nonwovens are obtained with a basis weight of 40, 60 and 80 g / m 2 .
  • the result is nonwovens with dense structure and low porosity at characteristic mechanical values (HZK WRK, MD: CD ratio).
  • the parameters of the experiment are shown in Tables 3 and 4.
  • Table 3 Exemplary embodiments 2, 40, 60 and 80 g / m ⁇ sup> 2 ⁇ / sup> PET / PE nonwovens, core / sheath filaments, mech. Properties. Kalandertemp calender pressure PEAnteil Weight thickness LD 5cm 2/100 Pa HZK MD HZD MD HZK CD HZD CD WRK MD WRK CD EN 29073 ang.
  • polyethylene terephthalate and a low melting co-polyester are coextruded in a known manner at a throughput of 0.74 and 0.8 g / L min and aerodynamically stretched to form core / sheath filaments.
  • the proportion of co-polyethylene terephthalate is 20% by weight.
  • the endless filaments are then dynamically deposited on a conveyor belt. Dynamic deposition is understood to mean that the orientation of the filaments to be deposited in the quenching direction can be influenced in a targeted manner. This is followed by solidification of the continuous filaments by a rough steel roller under pressure and heat.
  • the steel roller has a temperature of 130 ° C at a line pressure of 80 N / mm (roughness of 40 microns) on.
  • the polyethylene terephthalate is distributed in the form of elementary filaments in a matrix of co-polyethylene terephthalate.
  • a post-treatment in a hot air oven at a temperature of 160 ° C.
  • a spunbonded fabric having a basis weight of 100 g / m 2 is obtained. This results in a nonwoven fabric with dense structure and low porosity at characteristic mechanical values (HZK, WRK, MD: CD ratio).
  • HZK, WRK, MD CD ratio
  • Embodiment 4 100 g / m ⁇ sup> 2 ⁇ / sup> PET / CoPET nonwoven, core / sheath filaments, mech. Properties. Kalandertemp. PLD calender pressure Co-PET share Weight thickness LD 5c m 2/100 Pa HZK MD HZD MD HZK CD HZD CD WRK MD WRK CD EN 29073 ang.
  • polyethylene terephthalate and polyamide are coextruded in a known manner with a perforation throughput of 0.76 g / L min and aerodynamically stretched to form 16 PIE filaments.
  • the proportion of polyamide is between 30 and 50 wt .-%.
  • the endless filaments are then dynamically deposited on a conveyor belt. Dynamic deposition is understood to mean that the orientation of the filaments to be deposited in the transverse direction can be influenced in a targeted manner. This is followed by solidification of the continuous filaments by a rough steel roller under pressure and heat.
  • the steel roller has temperatures between 130 ° C and 180 ° C with a line pressure between 50 N / mm and 80 N / mm (roughness of 40 microns) on.
  • the composite filaments in cross-section on a circular segment-shaped configuration of the cross sections of the various elementary segments performing areas It can be seen a film-like structure in cross-section of the material structure of the nonwoven fabric according to the invention.
  • the original round fiber cross-section is largely deformed by the influence of heat and pressure and no longer found.
  • the surface energy of the produced spunbonded nonwovens is changed by a corona or plasma treatment.
  • Table 9 this is described in Example 8 (132 ° C / 80 daN / 36% PE) of Embodiment 1.
  • the page marked with * is the side of the process facing the charge side.
  • the corona charging takes place under standard conditions (room temperature, 7500 V) and different speeds.
  • the plasmatization takes place in a low-pressure atmospheric plasma system of Freudenberg Anlagensdienste KG at room temperature.
  • the measurement of Surface energies are carried out in accordance with ISO 9000 with Sherman test inks from Schnick D-42579 Heiligenhaus. To compare the surface energies, a commercially available packaging nonwoven made of flash spun polyethylene was used.
  • Example 1 Example 8, 80 g / m ⁇ sup> 2 ⁇ / sup> PET / PE nonwoven fabric, core / mantet filaments, surface energies untreated and after corona or plasma treatment.
  • Surface energy / [dyn] Surface energy / [dyn] page 1 Page 2* Page 1* Page 2 page 1 Page 2* Page 1* Page 2 Reference PE 40 - 42 40 - 42 # # 40 - 42 40 - 42 # # Trial 8 unheated.
  • the nonwoven fabric according to the invention is outstandingly suitable for treatment with plasma and / or corona treatment. Surprisingly, even very thin nonwoven layers can be treated such that they have a surface energy of 40 to 42 dyn. without destruction of the nonwoven fabric takes place.
  • the bending stiffness according to DIN 53350 and the coefficient of static friction according to ASTM D-4918-97 (2002) are to be used in particular. From a comparison of the measured values of selected Embodiments show a high bending stiffness with high surface smoothness, ie low coefficient of friction. It can be seen that a particularly advantageous friction coefficient can be achieved if polyethylene or polyamide is used to form the polymer matrix. Table 10: Various embodiments, bending stiffness acc. DIN 53350.

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Claims (16)

  1. Procédé de fabrication d'un non-tissé contenant au moins deux polymères, le point de fusion d'au moins un premier polymère étant supérieur au point de fusion d'au moins un deuxième polymère, comprenant les étapes de procédé suivantes :
    - la préparation de fibres multicomposantes, qui contiennent au moins deux polymères de points de fusion différents, le premier polymère étant choisi dans le groupe constitué par les polyesters, de préférence le polytéréphtalate d'éthylène et/ou le deuxième polymère dans le groupe constitué par : le polypropylène, le polyéthylène, le polyamide et/ou le polyester, de préférence le polytéréphtalate d'éthylène,
    - la liaison en surface des fibres multicomposantes par application d'une température de 100 °C à 300 °C et d'une pression de 40 N/mm à 150 N/mm, de sorte qu'au moins un premier polymère soit réparti sous la forme de segments élémentaires dans une matrice d'au moins un deuxième polymère, caractérisé en ce que des fibres Pie et/ou des fibres Pie creuses sont utilisées en tant que fibres multicomposantes, qui sont constituées d'au moins deux polymères de points de fusion différents,
    un non-tissé étant obtenu, qui présente une rigidité en flexion de 0,5 N/mm2 à 10 N/mm2, mesurée selon DIN 53350 à un angle de flexion de 10 %.
  2. Procédé de fabrication d'un non-tissé selon la revendication 1, caractérisé en ce que la liaison en surface des fibres multicomposantes est réalisée par application d'une pression de 40 N/mm à 100 N/mm, de préférence de 60 N/mm à 80 N/mm, notamment de 50 N/mm à 90 N/mm.
  3. Procédé de fabrication d'un non-tissé selon la revendication 1 ou 2, caractérisé en ce que la liaison en surface des fibres multicomposantes est réalisée par application d'une température de plus de 100 °C, de préférence de 100 °C à 300 °C, de manière davantage préférée de 110 °C à 200 °C, notamment de 120 °C à 180 °C.
  4. Procédé de fabrication d'un non-tissé selon l'une quelconque des revendications précédentes, caractérisé en ce que des fibres multicomposantes sont utilisées, dont le procédé de fabrication comprend les étapes suivantes :
    - le chauffage d'une substance polymère dans une extrudeuse,
    - la compression de la substance polymère par une buse,
    - l'étirement de la substance polymère,
    - le positionnement dynamique de la substance polymère sur une bande pour former une couche de fibres.
  5. Procédé de fabrication d'un non-tissé selon l'une quelconque des revendications précédentes, caractérisé en ce que les fibres multicomposantes sont configurées sous la forme de filaments bicomposants.
  6. Non-tissé, configuré sous la forme d'un matériau de base pour le revêtement avec des films, fabriqué par un procédé selon l'une quelconque des revendications précédentes, caractérisé par une rigidité en flexion de 1 N/mm2 à 10 N/mm2, mesurée selon DIN 53350 à un angle de flexion de 10 % et/ou une rigidité en flexion de 2 N/mm2 à 13 N/mm2, à un angle de flexion de 40 %.
  7. Non-tissé selon la revendication 7, caractérisé par un rapport sens machine/sens transversal de la force de traction maximale selon EN 29073 T3 de 0,7 à 1,6, de préférence de 0,8 à 1,5, notamment de 0,9 à 1,1.
  8. Non-tissé selon la revendication 7 ou 8, caractérisé en ce que le non-tissé contient au moins deux polymères, le point de fusion d'au moins un premier polymère étant supérieur au point de fusion d'au moins un deuxième polymère et le premier polymère se présentant sous la forme de segments élémentaires qui sont répartis dans une matrice du deuxième polymère.
  9. Non-tissé selon une ou plusieurs des revendications 7 à 9, caractérisé en ce que la proportion de la matrice dans le non-tissé est dans la plage allant de 1 % en poids à 60 % en poids, de préférence de 5 % en poids à 50 % en poids, notamment de 10 % en poids à 40 % en poids.
  10. Non-tissé selon la revendication 9 ou 10, caractérisé en ce que la différence entre les points de fusion du premier et du deuxième polymère est d'au moins 15 °C, de préférence d'au moins 20 °C.
  11. Non-tissé selon une ou plusieurs des revendications 7 à 11, caractérisé en ce que des segments élémentaires d'un premier polymère sont présents dans le non-tissé, agencés dans la section transversale sous la forme de segments de cercle ou sous la forme de parts de gâteau, sous forme circulaire ou multilobale, qui sont répartis dans une matrice du deuxième polymère.
  12. Non-tissé selon une ou plusieurs des revendications 7 à 12, caractérisé en ce que la proportion du deuxième polymère dans le non-tissé est de 50 %:50 %, de préférence de 70 % à 30 %, de manière encore davantage préférée de 60 % à 40 %.
  13. Non-tissé selon une ou plusieurs des revendications 7 à 13, caractérisé en ce que le premier polymère est choisi dans le groupe constitué par : le polyester, de préférence le polytéréphtalate d'éthylène, et/ou en ce que le deuxième polymère est choisi dans le groupe constitué par : le polypropylène, le polyéthylène, le polyamide et/ou le polyester, de préférence le polytéréphtalate d'éthylène.
  14. Utilisation d'un non-tissé selon une ou plusieurs des revendications 7 à 14 pour la fabrication d'un matériau composite.
  15. Matériau composite comprenant au moins une première couche, qui contient un non-tissé selon une ou plusieurs des revendications 7 à 15, ainsi qu'au moins une deuxième couche, de préférence sous la forme d'un film.
  16. Matériau composite selon la revendication 15, caractérisé en ce que la première couche présente une épaisseur de 0,01 mm à 1 mm, de préférence de 0,05 mm à 0,5 mm, notamment de 0,1 mm à 0,2 mm, et/ou la deuxième couche présente une épaisseur de 0,01 mm à 1 mm, de préférence de 0,05 mm à 0,5 mm, notamment de 0,1 mm à 0,2 mm.
EP11007649.4A 2011-09-20 2011-09-20 Non-tissé doté de filaments élémentaires contenant une matrice Active EP2573243B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP11007649.4A EP2573243B1 (fr) 2011-09-20 2011-09-20 Non-tissé doté de filaments élémentaires contenant une matrice
EP12765995.1A EP2758580B1 (fr) 2011-09-20 2012-09-11 Matériau non-tissé doté de filaments élémentaires contenant une matrice
PCT/EP2012/003804 WO2013041193A1 (fr) 2011-09-20 2012-09-11 Non-tissé pourvu d'une matrice contenant des filaments élémentaires
EP12006446.4A EP2573244B1 (fr) 2011-09-20 2012-09-14 Matériau d'absorption acoustique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11007649.4A EP2573243B1 (fr) 2011-09-20 2011-09-20 Non-tissé doté de filaments élémentaires contenant une matrice

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EP2573243A1 EP2573243A1 (fr) 2013-03-27
EP2573243B1 true EP2573243B1 (fr) 2015-02-11

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EP11007649.4A Active EP2573243B1 (fr) 2011-09-20 2011-09-20 Non-tissé doté de filaments élémentaires contenant une matrice
EP12765995.1A Active EP2758580B1 (fr) 2011-09-20 2012-09-11 Matériau non-tissé doté de filaments élémentaires contenant une matrice
EP12006446.4A Active EP2573244B1 (fr) 2011-09-20 2012-09-14 Matériau d'absorption acoustique

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EP12765995.1A Active EP2758580B1 (fr) 2011-09-20 2012-09-11 Matériau non-tissé doté de filaments élémentaires contenant une matrice
EP12006446.4A Active EP2573244B1 (fr) 2011-09-20 2012-09-14 Matériau d'absorption acoustique

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WO (1) WO2013041193A1 (fr)

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DE102014110585A1 (de) * 2014-07-28 2016-01-28 Bundesdruckerei Gmbh Datenblatt und Verfahren zu dessen Herstellung sowie ein Wert- und/oder Sicherheitsdokument
CN110462124B (zh) * 2017-03-28 2023-01-31 曼·胡默尔有限公司 纺粘型无纺布材料、包括纺粘型无纺布材料的物件、过滤介质、过滤元件及其应用
US11541829B2 (en) 2020-06-18 2023-01-03 Freudenberg Performance Materials Lp Acoustical baffle
CN114622341A (zh) * 2020-12-15 2022-06-14 浙江青昀新材料科技有限公司 一种聚乙烯无纺布及其应用

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US20050039836A1 (en) * 1999-09-03 2005-02-24 Dugan Jeffrey S. Multi-component fibers, fiber-containing materials made from multi-component fibers and methods of making the fiber-containing materials

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US4039711A (en) * 1971-06-07 1977-08-02 The Kendall Company Non-woven fabrics
DE10009281C1 (de) 2000-02-28 2001-03-22 Freudenberg Carl Fa Schallabsorptionsmaterial
US20030041953A1 (en) * 2001-08-31 2003-03-06 Bba Nonwovens Simpsonville, Inc. Method of making a bonded nonwoven web
KR100561275B1 (ko) * 2002-10-12 2006-03-14 에스케이케미칼주식회사 표면 열처리 견면
US7452832B2 (en) * 2003-12-15 2008-11-18 E.I. Du Pont De Nemors And Company Full-surface bonded multiple component melt-spun nonwoven web
US7438777B2 (en) 2005-04-01 2008-10-21 North Carolina State University Lightweight high-tensile, high-tear strength bicomponent nonwoven fabrics
WO2008149737A1 (fr) * 2007-05-31 2008-12-11 Toray Industries, Inc. Etoffe non tissée pour filtre de sac cylindrique, procédé pour la produire, et filtre de sac cylindrique produit à partir de celle-ci
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CN101946033B (zh) * 2007-12-28 2012-11-28 3M创新有限公司 复合非织造纤维料片及其制备和使用方法

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US20050039836A1 (en) * 1999-09-03 2005-02-24 Dugan Jeffrey S. Multi-component fibers, fiber-containing materials made from multi-component fibers and methods of making the fiber-containing materials

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EP2573243A1 (fr) 2013-03-27
WO2013041193A1 (fr) 2013-03-28
EP2573244B1 (fr) 2015-02-18
EP2573244A1 (fr) 2013-03-27
EP2758580B1 (fr) 2016-11-02
EP2758580A1 (fr) 2014-07-30

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