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
  • 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
  • D04H3/10—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 yarns or filaments made mechanically
  • D04H3/11—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 yarns or filaments made mechanically by fluid jet
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
  • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
  • D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
  • D04H1/495—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet for formation of patterns, e.g. drilling or rearrangement
• • 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
  • D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/018—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the shape
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/01—Surface features
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2503/00—Domestic or personal
  • D10B2503/06—Bed linen
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2505/00—Industrial
  • D10B2505/08—Upholstery, mattresses

Definitions

• the present invention relates to the field of textile products and their applications.
• the invention relates to a process for producing a patterned microfilamentary vitrified microfluidic nonwoven fabrics and to their use.
• Nonwovens are textile fabrics made of individual fibers and can be used with a wide variety of manufacturing processes, such as dry laid,
• Spunbonding Melt-blown or aerodynamic laid air laid.
• melt spinning a polymeric substance is heated in an extruder and forced through a spinneret by spinning pumps.
• the polymer emerges from the nozzle plate as a filament (continuous filament) in molten form, is cooled by an air flow and stretched from the melt.
• Air flow conveys the endless filaments onto a conveyor belt, which is designed as a sieve. Through a suction under the screen belt, the threads be fixed to form a fiber fabric.
• Fasergeleges can by heated rollers (calender), by a
• the textile-physical properties of nonwovens can be controlled by the chemical and textile-physical properties of the fibers or filaments forming them. This will be the fiber or
• Filament raw materials selected according to the desired chemical or physical properties, for example, with regard to their colorability, chemical resistance, their thermoformability or their
• the modulus and force-strain properties of the fibers or filaments depend on the material properties, which can be controlled by the choice of degree of crystallization and / or orientation and the cross-sectional geometry, the bending stiffness, the force absorption or the specific surface area of the individual fibers or to influence filaments.
• DE 102008033253 A1 describes a method and a device for producing structured nonwoven fabrics, in which the nonwoven, resting on a structure-providing surface, is exposed to an under-pressurized medium. It is intended that too
• structuring fleece is guided around the circumference of a drum during the application of the pressurized medium, wherein the surface of the drum has a herringbone pattern
• a disadvantage of this method is that the structuring pattern of the nonwoven fabric is not very stable and especially in mechanically demanding treatments, such as repeated washing or
• DE 102008061679 A1 discloses a method for pre-consolidating a pile of fibers and / or filaments, wherein the pile is transported on a base, using a device for
• the object of the invention is to provide structured nonwovens whose structuring patterns are also mechanical demanding treatments, such as repeated washing or
• the invention relates to a method for producing a structured
• Microfilaments and / or composite filaments which can be split into microfilaments are spun, drawn and laid down into a nonwoven fabric to form at least one fiber layer;
• the web is subjected to further application to a pressurized medium, resting on a structuring surface, whereby a structured microfilament nonwoven fabric is obtained.
• Microfilament nonwovens can be produced with a clearly defined structuring pattern, which also compared to mechanical
• the nonwoven fabrics show outstanding mechanical properties, in particular good durability for washing, with satisfaction functional properties, a good thermophysiological comfort, pleasant skin sensation and optics.
• the thermal pre-consolidation represents an essential step of the process according to the invention. Through them, the fibers of the
• Nonwoven fabric are transitionally stabilized so far that a trouble-free transfer to a system for acting on a pressurized medium is possible.
• the bond in the nonwoven fabric is weak enough that it can be broken up again in a simple manner by the application of the pressurized medium and is therefore at least partly reversible.
• a limitation of the fiber mobility at the time of structuring can be avoided. This is advantageous since, in the case of irreversible preconsolidation, for example needling, the associated decrease in fiber mobility makes the structuring step more difficult and consequently no sharply structured pattern is obtainable.
• the fibers are provided with a high restoring force, which additionally has a negative effect on the clarity and stability of the structuring pattern. From these
• the nonwoven web is not needled for preconsolidation, more preferably, it is exclusively thermally preconsolidated.
• microfilament nonwovens with a clearly defined structuring pattern which also surprisingly shows a high stability to mechanically demanding treatments, such as repeated washing or dyeing operations.
• thermo pre-consolidation prepared structured nonwoven fabrics at least partially due to the reversible thermal pre-consolidation of the web.
• Another positive effect of the thermal pre-consolidation is that it allows a transporting and rolling and unrolling and thus an offline process management.
• reversible thermal preconsolidation is also advantageous in the case of in-line process control since it makes it possible to keep the fibers stable in a desired structure in the process steps between solidification and structuring.
• thermal pre-consolidation can be carried out in the usual ways known to the person skilled in the art, for example with a heated calender. If a nonwoven comprising composite filaments is used as
• the strength in which the web is thermally preconsolidated the expert can adjust depending on the materials used, the basis weights and the desired degree of solidification. For higher basis weights of, for example, more than 130 g / m 2 , it may be advantageous Pre-solidification by means of für Literature, perform to ensure a naturalhizen of the web, for example, in the calender.
• the nonwoven can be easily transferred to a system for pressurization with a pressurized medium. This is possible because the fleece, as explained above, can be given sufficient stability by the thermal pre-consolidation.
• This treatment serves to at least partially break up the thermal pre-consolidation. This can be a limitation of
• Fiber mobility at the time of structuring are avoided. This is advantageous as explained above, since in this way the fleece can be provided with a sharply structured pattern in the subsequent structuring step.
• the extent of breakage can be known in the art, for example by adjusting the pressure and the
• Treatment duration to be controlled In principle, it has proved to be advantageous if the treatment of the nonwoven fabric is carried out in such a way that during structuring the thermal preconsolidation is completely or almost completely broken. Practical tests have shown that the more complete the breaking of the preconsolidation, the sharper the pattern becomes. Nevertheless, it may be appropriate to the
• Vorverfest only partially break, for example, to obtain a more consolidated nonwoven fabric.
• a pressurized medium a variety of media can be used. Particularly simple and inexpensive is the use of water. For the application of water, customary equipment for hydroentanglement can be used.
• the adjustment of the apply pressure may vary depending on the materials used and the desired extent of thermal pre-consolidation breakup. As a rule, pressures in the range of 200-300 bar have proven to be favorable.
• the nonwoven can rest on a structure-giving surface or on a non-structuring surface.
• this invention is subjected to a further application to a pressurized medium, resting on a structuring surface, whereby a structured layer is formed
• Microfilament nonwoven fabric is obtained.
• the structuring pattern can be formed two-dimensionally. However, it is particularly effective if the pattern is formed in three dimensions.
• both treatments according to the invention can be carried out with a medium under pressure in the same device, for example in a conventional device for water-jet needling.
• a medium under pressure for example in a conventional device for water-jet needling.
• the support surface of a support member can act and have for this purpose elevations.
• the raises are designed so that they represent the negative of the desired pattern.
• the carrier surface additionally has perforations as drainage openings.
• the carrier element is designed as a preferably perforated drum.
• the fleece to be structured is expediently guided on a structuring belt and in particular around the circumference of the drum during the application of the medium under pressure. As a result, a particularly simple and efficient process control is possible.
• the elevations for example, punctiform, circular, line-shaped, linear, wavy, diamond-shaped.
• the figurative design of the pattern whereby the nonwoven fabric can be equipped with pictures, comparable to the watermark known in paper.
• the support surface may have elevations with a polygonal, circular, semicircular or oval cross-sectional shape.
• the type of patterning pattern introduced can be chosen depending on the desired optics.
• the nonwoven fabric may be provided with a wave pattern, herringbone pattern, burl pattern, or textile patterns such as burlap, twill, satin, doubled, and / or jacquard patterns. It is also conceivable to provide the nonwoven fabric with perforations.
• the most varied media and preferably water can also be used in this process step.
• the setting of the apply pressure may vary depending on the materials used and the desired patterning results. As a rule, pressures in the range have been favorable
• medium used advantageously perforations as drainage openings can also be removed in a separate process step.
• the microfilaments When subjected to a pressurized medium, be it in the context of breaking the thermal pre-consolidation or in the structuring, the microfilaments, as known in the art, be entangled and solidified.
• Microfilaments are characterized by a very low average titer of less than 1 dtex.
• An advantage of using microfilaments is that due to the low bending stiffness of the filaments particularly clearly defined patterning patterns can be achieved, and that the
• the microfilaments have a titer between 0.1 dtex and 0.5 dtex and in particular from 0.15 to 0.3 dtex. It has been found that in these titers ranges a good
• filaments according to the invention are understood to mean fibers which, unlike staple fibers, have a theoretically unlimited length.
• the advantage of using filaments over staple fibers is the mechanical strength of the nonwoven fabric made therefrom. As the length of the fiber increases, the number of friction (or bonding) points with other fibers increases. Short fibers therefore have fewer points of friction, when the textile is loaded the fibers can easily shift and are easily pulled out of the textile.
• Binding points also the slip resistance and the force necessary to pull the fiber out of the composite. With a very large fiber length, this does not succeed at all, so that destruction of the textile can take place only by tearing the fiber.
• the materials making up the microfilaments and / or composite filaments may be selected depending on the desired properties of the structured nonwoven fabric made therefrom. It is essential for the method according to the invention that the filaments are at least partially thermally solidifiable. This is advantageous because so on one
• Vorverflechtung or needling or chemical bonding of the fibers can be dispensed with.
• Microfilaments and / or composite filaments have been found which contain thermoplastic polymers such as polyolefins, in particular polyethylene and / or of thermoplastic polymers, in particular the aforementioned
• the microfilaments and / or composite filaments have at least two different polymers whose melting points differ by at least 10 ° C, for example from 10 ° C to 30 ° C, more preferably in at least 15 °, for example from 15 ° C to 25 ° C and in particular by at least 20 °, for example from 20 ° C to 25 ° C such as PET (256 ° C) and PA6 (225 ° C). It is advantageous for the method described above if the polymers used are incompatible, immiscible and thus not glued together. In order to achieve a sufficient degree of thermal preconsolidation, it is furthermore advantageous if the proportion of thermoplastic polymers in the nonwoven fabric is at least 20% by weight, preferably from 25% by weight to 100%
• % By weight, more preferably from 40% by weight to 100% by weight, even more preferably from 50% by weight to 100% by weight, even more preferably from 60% by weight to 100% by weight, more preferably from 70% by weight. to 100% by weight, more preferably from 80% by weight to 100% by weight and in particular from 90% by weight to 100% by weight.
• microfilaments and / or composite filaments are used in such a type and amount and optionally the split degree is adjusted so that the proportion of microfilaments, based on the total weight of the nonwoven fabric at least 70 wt %, preferably from 70% by weight to 100% by weight, and especially about 100% by weight.
• the nonwoven fabric also has other fibers that are not microfilaments. In this case, however, is advantageous not to set the proportion of other fibers too high as with increasing
• Fiber titer reduces the conformability of the fiber to the structuring surface.
• the proportion of further fibers having a titre of more than 1 dtex, if present, according to the invention is preferably at most 25% by weight, more preferably at most 10% by weight and
• the nonwoven fabric is preferably produced starting from composite filaments which can be split into microfilaments.
• the proportion of the composite filaments in the nonwoven fabric is preferably set to more than 70% by weight, more preferably more than 80% by weight, more preferably more than 90% and even more preferably more than 95% by weight.
• Composite filaments consist of at least two elementary filaments and can be split into microfilaments and solidified by exposure to a pressurized medium, for example water jet needling, as is known to those skilled in the art.
• the microfilaments obtained by splitting have a titre of less than 1 dtex, preferably between 0.1 dtex and 0.5 dtex and
• An advantage of the use of composite filaments as starting material for the production of the microfilaments is that the titer of the microfilaments produced from them can be adjusted in a simple manner by varying the number of microfilaments contained in the composite filaments.
• the titer of the composite filaments can remain constant, which
• Another advantage of the use of the composite filaments is that the nonwoven fabric production without the use of solvents, chemical
• Pre-consolidation and / or structuring can be split and solidified.
• the degree of chipping advantageously amounts to more than 70% by weight, more preferably more than 80% by weight, more preferably more than 90% and even more preferably more than 95% by weight.
• the nonwoven is rolled up after the thermal preconsolidation, optionally temporarily stored, and provided for further processing (off-line process control).
• off-line process control it is likewise conceivable to carry out the treatment with the pressurized medium directly after the thermal preconsolidation (on-line process control).
• microfilaments and the composite filaments used as starting material for the production of the microfilaments can be prepared by methods known to those skilled in the art. Suitable processes are in particular melt spinning (spunbonding).
• polymeric substances can be heated under pressure, for example in extruders, and pressed through bi- or multicomponent nozzles, wherein
• Endless filaments are formed.
• the continuous filaments may be drawn and positioned by means of dynamic laydown on a conveyor belt deflected transversely to form a chamferage.
• a deflected in the transverse direction Advantageous on a deflected in the transverse direction
• Positioning of the continuous filaments means that this increases the isotropy of the mechanical properties of the nonwoven fabric.
• the composite filaments can have a wide variety of cross-sections known for the production of split fibers, for example a cross-section with orange-like or "pie"-named microstructure structures, wherein the segments can contain different, alternately incompatible polymers.
• the pie arrangement of the fibers may have, for example, 2, 4, 8, 16, 24, 32 segments or 64 segments, so that the composite filaments accordingly consist of 2, 4, 8, 16, 24, 32 or 64 microfilaments.
• hollow-pie structures that can also have an asymmetrically axially extending cavity.
• Pie structures, in particular hollow-pie structures, can be split particularly easily.
• microfilaments may be formed in cross-section n-sided, or multilobal.
• Composite filaments have different filaments containing at least two, preferably incompatible, thermoplastic polymers. This allows a particularly simple splitting achieved and at the same time
• Incompatible polymers are to be understood as meaning those polymers which in combination do not give only limited or poorly adhering pairings. Such a composite filament has a good cleavability in microfilaments and causes a favorable ratio of strength to basis weight. Another advantage of the use of incompatible polymers is that the bond achieved in the thermal pre-consolidation can be broken up more easily in the subsequent treatment with a pressurized medium, and due to the increased thereby achieved
• the Microfilaments comprise at least two types of microfilaments consisting of different incompatible polymers.
• the composite filaments preferably contain at least one incompatible polymer pair.
• incompatible polymer pairs are preferably
• the polymer pairs used are particularly preferably selected from polymer pairs with at least one polyolefin and / or at least one polyamide, preferably with polyethylene, such as polypropylene / polyethylene,
• Polyethylene terephthalate are preferred because of their conditional adhesiveness, and polymer pairs with at least one polyolefin are particularly preferred because of their poor tackiness.
• Particularly preferred components are polyesters, preferably polyethylene terephthalate, polylactic acid and / or polybutylene terephthalate on the one hand, polyamide, preferably polyamide 6, polyamide 66, polyamide 46, on the other hand, if appropriate, in combination with one or more further polymers incompatible with the abovementioned components, preferably selected from polyolefins, have proven particularly expedient. This combination has excellent cleavability. The combination of polyethylene terephthalate and polyamide 6 or of polyethylene terephthalate and polyamide 66 is very particularly preferred.
• the polymers used may contain at least one additive selected from the group consisting of color pigments, antistatic agents, antimicrobials such as copper, silver, gold, or hydrophilizing or hydrophobing additives in an amount of from 150 ppm to 10% by weight.
• 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
• 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 or a treatment in the tumbler and / or a treatment for
• the invention further relates to a structured nonwoven fabric which can be produced by the method according to the invention.
• the nonwoven fabric is characterized in particular by being
• Structuring pattern is very clearly contoured and is also resistant to mechanically demanding treatments, such as repeated washing or dyeing operations. It has thus been found that exemplary nonwovens according to the invention can also be used after 30
• Household washing cycles at 90 ° C according to DIN EN ISO 6330 still have visually and / or haptic recognizable patterning pattern.
• the nonwoven fabric shows good due to the microfilaments
• Dyeing process (jet-dye) a good long-term washing resistance with satisfactory performance characteristics, a good thermophysiological comfort, a high fineness, density, excellent cleaning performance, a high lightness, sound-absorbing properties and a pleasant skin sensor and optics.
• the nonwoven fabric according to the invention is characterized in that the
• the nonwoven fabric according to the invention is not needled and / or solidified by binders.
• the nonwoven fabric can also be provided with a structuring pattern which is not hardened with respect to the rest of the nonwoven fabric.
• the fibers are not destroyed by this structuring process but the intact filaments are pushed only to the edge of the hole structures and there matted together, comparable to a reinforcement of buttonholes. As a result, they can continue to contribute fully to the mechanical strength of the textile.
• the nonwoven fabric can have a wide variety of structuring, for example wave patterns, herringbone patterns,
• Nap patterns or textile patterns such as canvas, twill, atlas,
• the nonwoven fabric is at least partially in
• Microfilaments having an average titre of less than 1 dtex, preferably between 0.1 dtex and 0.5 dtex and in particular of 0.15-0.3 dtex, split and intertwined composite filaments.
• Nonwoven fabric preferably at least 70% by weight, preferably from 70% by weight to 100% by weight, and especially about 100% by weight.
• the nonwoven fabric preferably comprises microfilaments and / or at least partially split composite filaments containing thermoplastic polymers, such as polyolefins, in particular polyethylene, and / or thermoplastic polymers, in particular the abovementioned ones
• microfilaments and / or at least partially split composite filaments advantageously contain, as described above, various, alternately incompatible polymers.
• the microfilaments and / or composite filaments comprise at least two incompatible polymers, as above
• thermoplastic polymers in the nonwoven fabric is at least 20% by weight, preferably from 25% by weight to 100%
• % By weight, more preferably from 40% by weight to 100% by weight, even more preferably from 50% by weight to 100% by weight, even more preferably from 60% by weight to 100% by weight, more preferably from 70% by weight. to 100% by weight, more preferably from 80% by weight to 100% by weight and in particular from 90% by weight to 100% by weight.
• 40% by weight to 100% by weight even more preferably from 50% by weight to 100% by weight, even more preferably from 60% by weight to 100% by weight, more preferably from 70% by weight.
• 100% by weight more preferably from 80% by weight to 100% by weight and in particular from 90% by weight to 100% by weight.
• Basis weight of the nonwoven fabric is less than 50 g / m 2 , for example 20 to 50 g / m 2 , more preferably 20 to 40 g / m 2 and in particular 25 to 35 g / m 2 .
• the basis weight is measured according to DIN EN 29073.
• the pattern of structuring can have a particularly positive effect on the uniformity of the distribution of the microfilaments and facilitate the processing. This makes it possible to produce three-dimensionally structured nonwovens that are significantly lighter than
• the basis weight of the nonwoven fabric is more than 50 g / m 2 , for example 50 to 130 g / m 2 , more preferably 70 to 120 g / m 2 , even more preferably 80 to 110 g / m 2 .
• Nonwovens can be produced in this medium-weight category, in which the three-dimensional structure can adjust the feel and appearance of fabrics. As a result, for example, towels can be produced which are both dense, light and effective and also offer the familiar with consumers textile look.
• Another object of the present invention is the use of microfilament nonwoven fabric according to the invention as a cleaning cloth, towel, Sanitärtuch, bedding, upholstery, lining material.
• Filing tape laid to a pile of 37 g / m 2 The pile is stabilized by applying a stream of air, possibly also heated, from above through the pile through a deposit belt, which in turn is sucked off from below. With a free sag of only a few centimeters, the pile is guided into a calender, which is guided with a line pressure of 33 daN / cm and a temperature of both rolls of 150 ° C. The thermally pre-bonded nonwoven is rolled up, is so manageable (roll up and down) and is fed to another location of a hydroentanglement plant.
• the steps overlap fracturing of the preconsolidation, tracking the Bi-component filaments in polyamide and polyester segments, nestling the filaments on the extracted water drum structures and entangling the filaments in the turbulent flows between water jet and water
• fine mesh structures ie as smooth as possible screening drums for the first three passages, proved to be advantageous, while the fourth screening drum was the structuring one.
• the first 3 passages are driven moderately with alternating impingement of the sides (ABA):
• the structuring screen drum is subjected to at least two passages on the same side (BB) and high pressures. It is then dried by a through-suction and wound at low tension (winding pressure) into a roll.
• the goods depending on the structure in width 7 -15% and also the basis weight increases by 7 - 10%.
• the product can thus be subjected to disperse dyeing in the jet and maintains its structuring.
• FIG. 1 shows a perforated microfilamentary material produced by the process according to the invention. It can be clearly seen that the introduced perforation has a very clearly defined edge and is only crossed by very few fibers.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Nonwoven Fabrics (AREA)
• Manufacturing Of Multi-Layer Textile Fabrics (AREA)

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Applications Claiming Priority (2)

Publications (1)

Family

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Family Applications (1)

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Cited By (2)

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Citations (4)

Family Cites Families (8)

• 2015
  • 2015-08-10 DE DE102015010129.3A patent/DE102015010129A1/de not_active Withdrawn
• 2016
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