EP3775346A1 - Verfahren zur herstellung eines textilen gebildes mit elektrostatisch geladenen fasern und textiles gebilde - Google Patents

Verfahren zur herstellung eines textilen gebildes mit elektrostatisch geladenen fasern und textiles gebilde

Info

Publication number
EP3775346A1
EP3775346A1 EP19712559.4A EP19712559A EP3775346A1 EP 3775346 A1 EP3775346 A1 EP 3775346A1 EP 19712559 A EP19712559 A EP 19712559A EP 3775346 A1 EP3775346 A1 EP 3775346A1
Authority
EP
European Patent Office
Prior art keywords
fibers
polymer
fiber
fiber type
textile structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19712559.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ralph Berkemann
Fabian STAUSS
Frank ENDRISS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Groz Beckert KG
Original Assignee
Groz Beckert KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Groz Beckert KG filed Critical Groz Beckert KG
Publication of EP3775346A1 publication Critical patent/EP3775346A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • 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
    • D01D5/04—Dry spinning methods
    • 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
    • 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
    • D01F6/66—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyethers
    • D01F6/665—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyethers from polyetherketones, e.g. PEEK
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/16—Rubbing or similar working, e.g. to redistribute or remove fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43838—Ultrafine fibres, e.g. microfibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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
    • D04H3/16—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
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
    • B01D2239/0428—Rendering the filter material hydrophobic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0435—Electret
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0622—Melt-blown
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/064—The fibres being mixed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • 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
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/20—Cellulose-derived artificial fibres
    • D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/04—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons
    • D10B2321/041—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons polyvinyl chloride or polyvinylidene chloride
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/08—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated carboxylic acids or unsaturated organic esters, e.g. polyacrylic esters, polyvinyl acetate
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/10—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/12—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain
    • D10B2321/121—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain polystyrene
    • 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
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/06—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers
    • D10B2331/061—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers polyetherketones, polyetheretherketones, e.g. PEEK
    • 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
    • D10B2331/10—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyurethanes
    • 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
    • D10B2401/00—Physical properties
    • D10B2401/16—Physical properties antistatic; conductive
    • 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
    • D10B2505/04—Filters

Definitions

  • the invention relates to a method for comparatively straightforward production of a preferably plissiable textile structure which has electrostatically charged fibers, and a textile structure which is preferably prepared by the method according to the invention.
  • the textile structure is mainly used as a depth filter material. Filters in which this depth filter material is used are usually characterized by very good filtration properties.
  • a known method for electrostatically charging the fibers of filter materials is the charging of the respective fibers by means of corona discharge.
  • current methods using corona discharge do not allow sufficiently potent / effective electrostatic charging of the fibers.
  • fibers are using the Fenard effect
  • US 8,372,175 B2 shows a method for producing a filter material in which coarser fibers are to be produced by means of a spunbonding process and finer fibers by means of a meltblow process and mixed in the production process. After the production of the nonwoven fabric, its fibers, for example by means of corona discharge or by means of a so-called Hydrochargings be charged electrostatically.
  • the usual low filament velocities in spunbond processes differ significantly from the very high filament speeds in meltblow processes, ie the filament velocities differ very greatly.
  • EP 0 705 931 A1, DE 10 2004 036 440 A1, WO 2006/049664 A1 and the subsequently published WO 2018/065014 A1 disclose processes in which at least two different types of polymers are spun out into two different fiber types , The two fiber types are processed together to form a nonwoven at the end of the spinning process. In this case, friction processes between the two fiber types and an associated, randomly occurring triboelectric charging are unavoidable. Without a process control and material selection, which is specifically aimed at an intensive and sustainable triboelectric charging, but the fibers of the nonwovens produced can not be intensively and sustainably charged triboelectrically.
  • EP 1 208 900 A1 discloses a process in which staple fibers, which consist of at least two different polymers, are mixed and subsequently carded or needled. As a result, the fibers are charged triboelectrically.
  • the card clothing has to be removed with comparatively great effort prior to carding / needling of the staple fibers.
  • Another disadvantage is that only comparatively coarse fibers can be used in this process. On top of that, by the Carding and in particular by the needling puncture channels are formed, which adversely affect the filter properties.
  • the object of the invention is therefore to find a method with the textile structure, preferably for use as a filter material for an electret filter, can be produced, the fibers semipermanently electrostatically already during production and / or by a suitable uncomplicated treatment can be loaded.
  • a nozzle arrangement is used, the at least two separate
  • Nozzle bar has.
  • at least one nozzle bar can be used, with which at least two different polymers can be spun (a so-called multipolymer nozzle bar).
  • the method is preferred with exactly two
  • three or more nozzle bars or a multipolymer nozzle bar and further (any) nozzle bars may also be used in the method.
  • nozzle bars which are equipped with nozzles with a linear structure, which are also referred to as Exxon nozzles (hereinafter: Exxon nozzle bar). Furthermore, nozzle bars are known, the nozzles with a
  • nozzle bar with concentric nozzles A special design of the nozzles with concentric structure, as a Biax nozzles (named after the company "Biax", which manufactures these nozzles) referred.
  • Melt spinning process usually a meltblow spin process, e.g. a so-called Spun-Blown® or BIAX spin process, or alternatively a solvent spinning process, such as e.g. a solutionblow method, an electroblow method, an electrospinning method or a centrifuge spinning method.
  • a meltblow spin process e.g. a so-called Spun-Blown® or BIAX spin process
  • a solvent spinning process such as e.g. a solutionblow method, an electroblow method, an electrospinning method or a centrifuge spinning method.
  • a solvent spinning process such as e.g. a solutionblow method, an electroblow method, an electrospinning method or a centrifuge spinning method.
  • either the same types of spinning processes can be carried out with all nozzle bars or it can be done on the
  • Nozzle bars each different types of spinning processes are performed.
  • the first nozzle bar When using nozzle bars, with which only one polymer can be spun at a time, the first nozzle bar preferably has concentric nozzles, eg biax nozzles, but it may also have nozzles with a linear structure (Exxon nozzles).
  • second nozzle bar (and possibly third / further nozzle bar) can optionally a nozzle bar, which is equipped with nozzles with a linear structure (Exxon nozzles) or concentric nozzles, eg Biax nozzles, are used.
  • Solvent spinning process such as e.g. a solutionblow method, an electroblow method, an electrospinning method or a centrifuge spinning method (singly or in combination).
  • meltblown spin processes the melt of a polymer is forced through the capillary openings of a nozzle beam.
  • the polymer As the polymer exits the capillary ports, the polymer enters a gas stream, usually an air stream, at very high velocity.
  • the exiting polymer is from the gas stream
  • meltblow spinning processes produce longer lengths of thread (i.e., longer fibers), but significantly more filament breaks can occur compared to spunbond spinning processes.
  • solvent spinning processes instead of the melt, a solution of a polymer is spun in a solvent.
  • the solutionblow method, electroblowing method, electrospinning method and centrifuge spinning method is carried out largely analogous to the meltblow spinning processes up to this difference.
  • melt or alternatively the solution (at least) of a second polymer is spun out into fibers (at least) of a second type of fiber.
  • a third nozzle bar a third polymer is spun into fibers of a third fiber type. It can also be spun by other nozzle beam fibers of other polymers to other fiber types.
  • a multipolymer nozzle bar is used, with which two or more different polymers can be spun.
  • more Multipolymer nozzle bars and / or other nozzle bars are used, with which only one polymer can be spun out.
  • the polymer for the production of the first fiber type and the polymer for the production of the second fiber type and optionally the polymers for the production of other fiber types are chosen so that the spun from these (at least) two different polymers fibers by means of triboelectric Load effects between the (at least) two different fiber types so well that filters with quality factors greater than 0.2 can be produced with the textile structures produced if the process parameters and, if applicable, the
  • Aftertreatment methods are suitably selected. It is usually sufficient if only based triboelectric methods for electrical charging.
  • a polymer which contains at least one additive which can bind radicals and / or which contains at least one additive which can act as an internal lubricant.
  • the additives individually or preferably in combination, a more intensive and sustainable, usually semi-permanent, triboelectric charging of the fibers of the textile structure can be achieved.
  • a polymer comprising at least one of the above-described additives contains (ie an additive that can bind radicals and / or contains an additive that can act as an internal lubricant).
  • the fiber type in question may either be the one with the smallest average fiber diameter or, if more than two fiber types are present, also any other fiber type which is not the one with the largest average fiber diameter.
  • the friction processes by which the triboelectric charging is to be achieved can occur before and / or during the formation of the textile structure.
  • the triboelectric charging may take place during the spinning process and / or when the textile structure is deposited on a suitable collecting / depositing device, such as e.g. take a collection tape or a collecting drum.
  • a suitable collecting / depositing device such as e.g. take a collection tape or a collecting drum.
  • the relevant friction processes can be brought about by a post-treatment of the textile structure already produced. The aftertreatment can be a significant
  • the process parameters are selected such that the fibers of the one fiber type have a larger average fiber diameter than the fibers of at least one other fiber type.
  • the finer fibers serve, in particular, to deposit the finer particles, that is, to increase the filtration efficiency with respect to finer particles.
  • the coarse fibers serve to filter out the coarser particles; on the other hand, the coarser fibers ensure adequate mechanical stability of the bimodal nonwoven fabric. This also implies that the finer fibers have some distance from each other by mixing with coarse fibers in such a nonwoven fabric.
  • the finer fibers have some distance from each other by mixing with coarse fibers in such a nonwoven fabric. For a nonwoven fabric, the
  • the fine fibers would be too close together, ie, such a nonwoven fabric, when used in a filter, would cause too high a pressure loss and generally dusting or if it was from a medium containing particles. is traversed, very quickly block.
  • the one type of fiber and the at least one other fiber type, by which the mechanical structure of the textile structure is formed, and the fiber types, which are formed from the first polymer and the at least one second polymer, by the triboelectric properties of the textile structure are determined, each match.
  • the at least one second fiber type coincide with the at least one other fiber type.
  • the first fiber type may coincide with the at least one other fiber type, and at the same time the at least one second fiber type may correspond to the one fiber type.
  • the mechanical and the triboelectric properties coincide, that is, the coarse and fine fibers consist of different polymers, which can also charge triboelectrically.
  • the respective fiber types may also deviate completely or partially from one another.
  • one fiber type coincides with the first fiber type, while the at least one other fiber type is spun by means of at least one further (third) nozzle beam to a further (third) fiber type and differs from the second fiber type.
  • a textile structure can be produced, which consists of a framework of largely electrically uncharged, coarse fibers and two, usually thinner fiber types that can be well charged triboelectrically.
  • the first polymer and the at least one second polymer must usually have a sufficiently large separation from each other in a triboelectric series.
  • most triboelectric series do not make any
  • the table contains a further column in which a correction factor is indicated: W (weak) means that the triboelectric charging falls less than would be expected according to the value of the charge affinity, N (normal) means that the charging
  • the first polymer and the at least one second polymer are chosen such that the difference between the charge affinity of the fibers of the fiber type formed from the first polymer and the charge affinity of the fibers of the fiber type formed of the at least one second polymer is at least 15 nC / J, at least 30 nC / J, at least 50 nC / J, at least 70 nC / J, at least 85 nC / J, at least 100 nC / J or at least 115 nC / J.
  • the first polymer and the at least one second polymer may be chosen such that the difference in charge affinity between the first and at least one second polymers is at least 15 nC / J, at least 30 nC / J, at least 50 nC / J, at least 70 nC / J, at least 85 nC / J, at least 100 nC / J or at least 115 nC / J.
  • the charge affinities of the fibers are difficult to determine, but the charge affinities are in good approximation to the charge affinity of the polymers from which they are made correspond. Under the difference of
  • Charge affinities should always be understood as a positive numerical value, i. the amount of difference between the two charge affinities.
  • At least one of the polymer may be polypropylene, polyactide, polystyrene, polyvinyl chloride or a mixture of these polymers are used. These polymers are characterized by comparatively negative values (negative values of high magnitude)
  • the type of fiber made of the aforementioned polymers preferably has the smallest mean fiber diameter.
  • a polyamide eg nylon
  • polyurethane cellulose, polycarbonate, a synthetic resin
  • polybutylene terephthalate polyethylene terephthalate
  • PVDF POM polybutylene terephthalate
  • PEEK polyethylene terephthalate
  • PAN polyacrylate
  • PMMA polymethyl methacrylate
  • the first polymer used is polypropylene and the second polymer is a polyamide. It has proven to be advantageous if at least the polypropylene contains an additive that can bind radicals and / or contains an additive that can act as an internal lubricant. Further, it has been found to be advantageous that the type of fiber spun from the polypropylene has a smaller mean fiber diameter than the fiber type spun from the polyamide.
  • the "whipping" effect is characterized by the fact that the fibers perform a kind of wobble at a certain distance from the associated nozzle beam, ie the fibers do not move directly in the direction away from the associated nozzle beam and towards the collecting device, but they also perform fast and pronounced lateral movements.
  • the nozzle bars are arranged so that the fibers of the first type (consisting of a first polymer) at a relatively short distance, ie well before the fibers reach the collector, with the fibers of (at least one) second type (consisting of a second Polymer) find, due to the "whipping" effect, already during the spinning and deposition process (in situ, ie before the fibers of the first type and the fibers of the
  • This nozzle bar is hereinafter referred to as the farther nozzle bar.
  • a distance between the farther nozzle bar is hereinafter referred to as the farther nozzle bar.
  • the electret properties of the textile structure can be further improved (or possibly even activated only) by inline or offline mechanical rubbing of the fibers, which consist of the first polymer, and the Fibers, which consist of the at least one second polymer, is caused to each other.
  • the fiber-free steels e.g. higher frequency, mechanically and / or pneumatically and / or excited by a (pulsating) electric field.
  • a pulsating Fuftströmung and / or excitation by ultrasound are used. It can be used for this purpose from the prior art already known methods that are used to achieve higher nonwoven uniformities.
  • a particularly good reinforcement of the triboelectric charging can be achieved that the fabric produced fabrics are subsequently exposed to high-frequency sound / ultrasound.
  • sound with a frequency greater than 1 kHz, greater than 10 kHz or greater than 15 kHz can be used.
  • Sound with a frequency of 1 kHz to 100 kHz, with a frequency of 5 kHz to 50 kHz or with a frequency of 15 kHz to 25 kHz can be used for sound reinforcement.
  • Triboelectric charges could be achieved at frequencies of approximately 20 kHz.
  • the sonication time may be in the range of one second to 30 minutes, preferably 10 seconds to 10 minutes, more preferably 30 seconds to 3 minutes. Particularly good results at the same time with little effort could with a
  • sonic / ultrasonic textile structures preferably nonwovens
  • sonic / ultrasonic textile structures preferably nonwovens
  • the fibers with larger diameters cool more slowly, with the result that they stick in the formation of the textile structure, usually the formation of a nonwoven fabric by depositing on a collecting device, stronger (or even stick) as fibers with smaller diameters.
  • a weak bonding of the fibers does not matter, as long as the bonds in question can be subsequently released again by a sound / ultrasound effect.
  • all fiber types can be chosen so fine that virtually all fibers remain mobile, that is, the friction processes take place mainly between moving fibers.
  • a part of the fibers can be coarser, in which case the coarser fibers, at least to a large extent, stick together. It has been found that in such a constellation only the coarse fibers stick together, but virtually no fine fibers stick to the coarse fibers. In this case, therefore, the main focus is on the friction processes between a practically fixed framework of coarse fibers and moving fine fibers.
  • the average fiber diameter of the coarsest fiber type are then typically from 5 pm to 50 pm, preferably from 8 pm to 25 pm, and particularly preferably from 10 pm to 15 pm.
  • the mean fiber diameter of the coarsest fiber type can be even smaller, for example 0.2 pm to 10 pm, 0.5 pm to 5 pm or 1 pm to 3 pm.
  • the finished textile structure can also be forged or kneaded, z. B. by being pulled through a loop or eyelet.
  • the textile structure can also be stretched for this purpose or, for example, by means of a felting process, pushed.
  • Another way to bring the fibers to vibrate or otherwise move in motion and cause friction, is that the textile structure vibration or a public address, for. B.
  • the textile structure can also be flowed through with gases or vapors.
  • Charging of fibers can be used in situ, such. Hydrocharging or one
  • a suitable (for example a turbulent) air duct can be generated and / or a sound or vibration can be used.
  • a suitable air duct can be generated and / or a sound or vibration can be used.
  • all other methods for triboelectric reloading of the fibers can be used, which are described in the previous paragraph in connection with the aftertreatment of the (freshly produced) textile structure.
  • the (plissable) textile structure according to the invention consists of fibers which are combined with a
  • the fibers are composed of a first type of fiber consisting of fibers of a first polymer and (at least) a second type of fiber consisting of fibers of a second polymer.
  • the fibers produced from the first polymer and / or from the at least fibers produced by a second polymer are able to be so strongly charged triboelectrically by friction processes occurring before and / or during the shaping of the textile structure and / or by friction processes during the course of a subsequent treatment that filters with quality factors greater than 0.2 can be produced using the textile structure ,
  • the first polymer and / or the at least one second polymer contains at least one additive which can bind radicals, and / or an additive which can act as an internal lubricant.
  • the textile structure may contain fibers with a larger average diameter (coarser fibers) and with a smaller average fiber diameter (finer fibers).
  • the diameter of the coarser fibers can be chosen so large that the filter material (nonwoven material) without substrates, such. Spun nonwovens, can be used.
  • quality factors of greater than 0.2 can be achieved.
  • the quality factor QF is defined as
  • the collecting device is preferably a conveyor belt equipped with a suction device or a transport drum.
  • the fibers of the first and the (at least) second fiber type are from the suction of the conveyor belt or the
  • the textile structure of the fibers of one fiber type and the fibers of at least one other fiber type is formed by means of the collecting means that before and / or during the collection of the fibers, for example by depositing the fibers on a collecting belt or a collecting drum , a mixing of the two (or other) fiber types takes place.
  • the textile structure is formed.
  • the fibers of one fiber type are then mixed with the fibers of the at least one other fiber type at least in regions.
  • the range can be so small that there are quasi two (or three or more, if three or more Nozzle bars are used) discrete layers are held together only by a very thin mixing area.
  • the process parameters e.g. the angle between the
  • this portion extends over at least 50%, 90% or 98% of the volume of the textile structure.
  • Depth filter material is to be used for an electrostatically charged filter medium, then the gradient is preferably formed so that on the side of the
  • Nonwoven fabric to be arranged in the filter on the upstream side the proportion of coarser fibers is higher than the proportion of finer fibers, and on the side to be arranged on the downstream side, the proportion of finer fibers is higher than the proportion of coarser fibers.
  • the areas in which the proportion of the finer fibers is relatively high are added quickly with coarse particles.
  • the gradual course also avoids interfaces with large fiber diameter differences that tend to cause particles to accumulate and eventually block. As a result, almost the entire cross section of the structure is used for filtration.
  • a thinner nonwoven fabric may be selected as the depth filter material, but having the same particle or dust holding capacity as a conventionally produced, thicker nonwoven fabric.
  • pleated filters usually the folds or crests of the wrinkles do not contribute or only minimally to the filtration.
  • the filtration effect of filters made from the thin nonwoven fabrics of the present invention is better than that of filters made from thicker nonwoven fabrics.
  • the area of the folds / crests of the wrinkles which is ineffective for filtration is smaller than in the case of thicker nonwovens.
  • the fibers of the one fiber type ie, the coarser fibers, are preferably spun out such that the mean value of the fiber diameter is greater than 10 pm, greater than 15 pm, greater than 25 pm or greater than 50 pm.
  • the mean value of the fiber diameter may be in a range of for example 2 pm to 200 pm, 5 pm to 60 pm or 10 pm to 30 pm.
  • the mean value of the fiber diameter is in the range 5 pm to 60 pm.
  • the fibers of the at least one other fiber type i. the finer fibers are preferably spun out such that the mean value of the fiber diameter is less than 11 ⁇ m, less than 5 ⁇ m or less than 3 ⁇ m.
  • the fiber diameter of the smallest fibers of the second fiber type can reach minimum diameters of up to 20 nm.
  • the respective fibers are preferably made by a solvent spinning process.
  • a nozzle bar may be used which has nozzles having a diameter in the range of 500 to 850 microns, and another nozzle bar having nozzles having a diameter of Have diameters ranging from 100 to 500 microns.
  • MFI melt flow index
  • Standard conditions for different polymers listed If no standard parameters for the determination of the MFI of the polymer in question are available in both standards and in the table given, existing tables should be used, such as the DIN Paperback "Thermoplastic molding compounds", the CAMPUS database or the material data sheets of the manufacturer of the polymer in question , Since several parameter sets, in particular several test temperatures and / or test loads, are often given for the same polymer for the determination of the MFI, in such a case, always the parameter set with the highest temperature and possibly the Parameter set are selected, which in addition to the highest temperature also specifies the highest test load.
  • a particularly intensive and long-lasting static charge can be achieved by using as the first polymer and / or as the second polymer a polymer which contains at least one additive which can bind radials, i. a so-called radical scavenger.
  • radical scavenger may e.g. a substance from the group of sterically hindered amines (HALS: Hindered Amine Light Stabilizers), such as e.g. the Chimasorb® 944 known under the trade name.
  • HALS Hindered Amine Light Stabilizers
  • Chimasorb® 944 known under the trade name.
  • an internal lubricant e.g. a substance from the group of steramides.
  • Distearylethylenediamide has proven to be particularly suitable (so-called EBS: ethylenebis (stearamides), also known under US Pat
  • Polymers are preferably used which contain at least one of the abovementioned additives, which can act as free-radical scavengers, and at the same time at least one of the additives described above, which can act as an internal lubricant. A particularly good effect of these additives / additives was observed in connection with polypropylene.
  • the substances acting as free-radical scavengers are able to bind electrostatic charges comparatively long-term.
  • the internal lubricants cause substances that are capable of binding charges in a molten state in the long term
  • At least one polymer containing at least one further additive which is capable, for example physically, of binding additional charges such as, for example, ferroelectric ceramics (eg barium titanate) or alternatively containing a further additive, can be used is suitable to prevent charges that are already on the fibers concerned are delivered too fast (ie, the effect of a quasi protection of the existing charges).
  • flocculants such as fluorine-containing oxazolidinone, fluorine-containing piperazine or a stearate ester of
  • fine fibers i.e., fibers having an average fiber diameter of less than 1 micron
  • the fibers of the first fiber type and / or the fibers of the second fiber type may also be staple fibers, e.g. by means of a so-called Rando Weber, or particles, such as e.g.
  • Activated carbon particles e.g. be added by means of a gutter.
  • the admixture takes place in the inventive method before and / or during the formation of the textile structure in the collecting device.
  • the Feinstfasem are usually not as finished Fasem / particles but by means of a separate
  • Spinning device e.g. by means of a solution-blow-spinning device, which produces the Feinstfasem directly before their admixture added.
  • FIG. 1 shows a schematic structure of a meltblower system with a nozzle arrangement consisting of an Exxon and a Biax nozzle bar
  • FIG. 2 shows a schematic structure of a meltblower system with a nozzle arrangement, which consists of two biax nozzle bars,
  • FIG. 3 shows a schematic structure of a system with a nozzle arrangement, which consists of a solutionblow and a biax nozzle bar,
  • Fig. 4 is a schematic representation of the geometry of a meltblown system with two
  • FIG. 5 shows a schematic structure of the plant used in the experiment for the production and ultrasonic aftertreatment of a fiber web.
  • a liquid first polymer 2 is introduced into the polymer supply line 4 and exits at the end of the nozzle tube 5 again.
  • the biax nozzles of the biax nozzle beam 1 also compressed hot air 6 is introduced, which emerges at the outlet opening 7 as drawing air 8 again.
  • the exiting first polymer 2 is detected by the drafting air 8, whereby a stretching of the Polymerfasem formed by the exiting polymer 2 is effected.
  • the polymer fibers of the polymer 2 are deposited on the collecting drum 9.
  • a second polymer 3 which typically has a value of charge affinity which is very different from the value of the charge affinity of the first polymer 2, is spun into polymer fibers.
  • the spinning process carried out by means of the Exxon nozzle beam 10 is very similar to the spinning process carried out by means of the biax nozzle beam 1.
  • the Exxon nozzle bar 10 has, in contrast to the Biax nozzle bar 1, a linear structure.
  • the Polymerfasem of the first polymer 2 and the second polymer 3 mix on their way to the collecting drum 9 for the first time, at least partially, in
  • Mixture point 11 The distance of the mixing point 11 from the two nozzle bars 1, 10 is not drawn to scale and is in the real process usually closer to the two nozzle bars 1, 10 as shown in the figures. The at the mixing
  • Fig. 2 a similar construction is shown, in which, however, two biax nozzle bars 1 are used, wherein with one biax nozzle bar 1, the first polymer 2 and the other biax nozzle bar 1, a second polymer 3 to Polymerfasem to be spun.
  • Fig. 3 shows an analogous structure in which a solutionblow nozzle bar 12 is used in combination with a biax nozzle bar.
  • Fig. 4 shows schematically how the geometry of a meltblown system, which has a first nozzle bar 13 and a second nozzle bar 14, can be adjusted in principle.
  • the axis A, B or C of the second nozzle beam 14 is tilted by an angle Q with respect to the axis D of the first nozzle beam 13 and / or the distance of the first nozzle bar 13 to the collecting drum 9 varies.
  • a tilt of 15 ° to 60 ° takes place.
  • the length of the axis D, ie, the distance of the first nozzle bar 13 to the collecting drum 9, can be varied.
  • the mixing point 11 should indeed be as far away from the collecting drum 9, the mixing point 11 but on the other hand may not be too far away from the
  • Receiving drum 9 are selected, otherwise the quality, in particular the
  • each fiber webs with triboelectrically charged fibers and with a layer structure can in general each fiber webs with triboelectrically charged fibers and with a layer structure, with a partial
  • Fiber types are produced.
  • a meltblower plant was used, as shown in Fig. 1, that is a system with a nozzle assembly consisting of an Exxon nozzle beam 10 and a biax nozzle beam 1.
  • Fig. 5 The exact geometry of the nozzle arrangement used is in Fig. 5 is shown.
  • Each of the nozzle bars had a separate polymer melt supply in which granules of the respective polymer was melted in an extruder. The polymer melt was then conveyed to the associated nozzle bar.
  • Table 3 shows the experimental equipment configuration used and the one used
  • the fibers produced followed a stream of air directed (in the direction of spinning) in the direction of a collecting belt which was equipped with a collecting device.
  • the collected fibers formed there into a nonwoven fabric, which was followed by the direction of movement of the tape and wound up. Care was taken to ensure that the nonwovens produced had just enough integrity. This ensured that the highest possible proportion of the fibers did not stick, or at least did not stick firmly, to one another, but remained mobile, or the respective fibers were glued only so weakly that they could be easily detached by the action of ultrasound. This should be a good triboelectric
  • the sonication of the nonwoven fabrics was carried out in the present embodiment, only after their preparation.
  • the nonwovens were exposed to sound at a frequency of 20 kHz for 1 minute by means of a Visaton G20SC tweeter, which was arranged at a distance of about 520 mm from the relevant nonwoven fabric.
  • the control of the tweeter was done with a Grundig tone generator TG4. It is also conceivable to use such a sound not only directly in the production of nonwovens but also for the regeneration of filters in which the nonwovens according to the invention are used, should their filtration efficiency have diminished during use.
  • the pressure loss and the filtration efficiency were measured at 0.1 m / s with a test bench MFP 3000 Palas. The measurement area was 100 cm 2 , DEHS was used as the aerosol.
  • the quality factor was according to the formula
EP19712559.4A 2018-04-06 2019-03-19 Verfahren zur herstellung eines textilen gebildes mit elektrostatisch geladenen fasern und textiles gebilde Withdrawn EP3775346A1 (de)

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DE102020116689A1 (de) 2020-06-24 2021-12-30 Thüringisches Institut für Textil- und Kunststoff-Forschung Rudolstadt e.V. Melaminharz-Filtervlies
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KR20190057385A (ko) * 2016-10-06 2019-05-28 그로츠-베케르트 카게 정전기적으로 대전된 섬유를 갖는 주름 가공 가능한 텍스타일 직물의 제조 방법, 및 주름 가공 가능한 텍스타일 직물

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