EP0350627A1 - Dispositif pour la fabrication de couches de fibres volumineuses - Google Patents

Dispositif pour la fabrication de couches de fibres volumineuses Download PDF

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Publication number
EP0350627A1
EP0350627A1 EP89110617A EP89110617A EP0350627A1 EP 0350627 A1 EP0350627 A1 EP 0350627A1 EP 89110617 A EP89110617 A EP 89110617A EP 89110617 A EP89110617 A EP 89110617A EP 0350627 A1 EP0350627 A1 EP 0350627A1
Authority
EP
European Patent Office
Prior art keywords
fiber
section
fiber layer
bar
conveyor
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.)
Granted
Application number
EP89110617A
Other languages
German (de)
English (en)
Other versions
EP0350627B1 (fr
Inventor
Radko Prof.Dr.Ing. Drsc Krcma
Vladislav Hybl
Oldrich RNDr CSc Jirsák
Jaroslav Doz.Ing. Csc Hanzl
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.)
INCOTEX SPOL. S R. O.
Original Assignee
Incotex Spol S R O
VYSOKA SKOLA STROJNI A TEXTILNI
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 Incotex Spol S R O, VYSOKA SKOLA STROJNI A TEXTILNI filed Critical Incotex Spol S R O
Publication of EP0350627A1 publication Critical patent/EP0350627A1/fr
Application granted granted Critical
Publication of EP0350627B1 publication Critical patent/EP0350627B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—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
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
    • 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
    • D04H18/00—Needling machines
    • 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
    • D04H18/00—Needling machines
    • D04H18/02—Needling machines with needles

Definitions

  • the invention relates to a device for producing voluminous fiber layers with a fiber portion predominantly oriented perpendicularly to the layer plane.
  • the layers are mostly held together by sprayed-on dispersion binders or by thermoplastic binding fibers and in some cases also by processing in needling machines.
  • needling a fiber portion is aligned in the vertical direction and at the same time the fiber fleece layer is compressed, so that the thickness and thus the heat insulation capacity of the fabric obtained decreases considerably.
  • the volume of the flat structure is maintained if the fiber layer consists of a crimp-shaped fiber web in which the fiber portion oriented in the direction perpendicular to the layer plane predominates.
  • the nonwoven fabric is pressed into a toothing of a large drum in order to form crimps or folds and is connected to a support web by application of a binder.
  • CS-PS 87 556 a device is known in which a nonwoven fabric is alternately folded with the aid of a pivotable pair of knives and pressed into a backing fabric after application of an adhesive binder.
  • a device for forming compressed folds of nonwoven from carding according to CS-OS 235 494 contains a needle drum, a plate and a body which form a gap into which a removal bar (chipper) protrudes. This then folds the nonwoven, respectively. the fibrous web wavy.
  • the resulting structure must be solidified either by impregnation with a binder or by sticking to a base layer.
  • the fiber layer can also be consolidated in a subsequent sewing process with or without binding threads.
  • the fiber layers produced in such a device thus have a considerable proportion of fibers oriented perpendicularly to the plane of the fabric, but must be consolidated mechanically or with the aid of binders because of a lack of cohesion.
  • the invention has for its object to eliminate the disadvantages of the prior art and a device for producing voluminous fiber layer with a fiber portion predominantly oriented perpendicular to the layer plane to accomplish.
  • the device consists of a section for feeding a fiber layer such as fiber web, non-woven fabric, fiber ribbon or knitted fabric, a compression section for compressing and forming the fiber layer and a section for discharging the fiber layer.
  • the feed section contains two walls inclined at an angle of 25 ° to 60 °, formed by a metal plate or a system of longitudinally arranged rods or tubes.
  • the one wall of the feed section advantageously consists of a system of wires arranged in parallel and simultaneously forming a wall of the discharge section.
  • the upsetting section expediently contains a forming element in the form of a strip which is provided with tips on its working surface and can be assigned to a compression strip which works synchronously with it.
  • the forming element can be formed by a system of mandrels or wires held on a rotatable cylinder.
  • the main advantage of the device according to the invention lies in the fact that it enables the production of a voluminous fiber layer made of fiber pile, nonwoven fabric, roving and flat textiles without a textile support base.
  • the device consists of a feed section, an upsetting section and a discharge section.
  • the feed section has two walls 6, 9 inclined relative to one another at an angle of approximately 60 ° and a chipper 2 with a needled working edge arranged in the gap opening and pivotable in the direction of the arrow.
  • the upsetting section consists of a conveyor belt 3, one on the circumference longitudinally corrugated roller 7, the central portion of the wall 6 and a compression bar 5.
  • the discharge section is formed by the conveyor belt 3 and a parallel upper boundary wall 6, which in this embodiment is designed as a bent portion of the inclined wall 6.
  • the fiber web fed to the device is processed in such a way that the chopper 2 and the compression bar 5 vibrate synchronously with one another. If the vibrating chipper 2 is in the lower dead position, the then also curved arcuate compression bar 5 is pulled off the roller 7 and vice versa.
  • the fiber web supplied directly by the card is inserted from above between the walls 6 and 9 and removed by the chipper 2 onto the conveyor belt 3, where it is formed into a folded fiber layer 4 between the conveyor belt 3 and the wall 6.
  • the meltable fiber layer 4 containing fibers is then conveyed into a hot air system 8 and solidified there.
  • FIG. 2 differs from the device of FIG. 1 only in that the lower portion of the wall 9 follows the circular path of circumferential arcuate compression mandrels 18 and the wall 6 as a grate from z. B. steel wires is formed, through which the held on the roller 7 compression mandrels 18 can pass.
  • the fiber layer supplied (z. B. a transversely layered nonwoven) is detected when slipping on the wall 9 by the compression mandrels 18 and into which the conveyor belt 3, the hot air system 8 and the exit portion of the wall 6, respectively. of Rostes comprehensive discharge section of the device promoted.
  • the connection of the structure in the longitudinal direction is increased by the currently vibrating compression bar 5 with puncture needles, which is aligned parallel to the conveyor belt 3 and carries out reciprocating movements in the direction of the arrow, the timing of which is coordinated with the number of compression mandrels 18 and the speed of the roller 7 is.
  • the fiber pile supplied by the card containing 75% polyester cut fibers and 25% polypropylene binder fibers and having a basis weight of 10 g / m2, is conveyed between the walls 6 and 9 of the feed section of the device.
  • the vibrating chopper 2 folds the fibrous web on the conveyor belt 3 into the form of a fiber layer with an adjustable fold height, the folds being pressed together by the compression strip 5.
  • the fiber layer is transported on the conveyor belt 3 into the hot air system 8 and solidified there.
  • the textile fabric produced in this way has excellent compressive strength, recovery capacity even after prolonged exposure and good thermal insulation properties. It is suitable as a heat-insulating material or lining material for the upholstery industry.
  • FIG. 3 shows a variant of the device shown in FIG. 1, which in its feed and compression section only has the chipper 2 - ie no compression strip.
  • the movement of the fiber layer 4 is carried out here by the conveyor belt 3.
  • the upsetting section of the variant according to FIG. 4 contains only the curved bar 5 without the chipper.
  • the working surface of the compression bar 5 is provided with tooth-like projections 10. These serve to convert the relevant fiber sections into the position parallel to the plane of the fabric in order to solidify them in this direction.
  • FIG. 8 shows a compression strip 5 (see also FIGS. 1 and 2) with adjustable puncture needles 11. By penetrating these needles into the fiber layer formed, the structure is better consolidated in the horizontal direction.
  • a thread system with a proportion of thermoplastic binding fibers is fed into the gaps of the chopper 2 at intervals of 10 mm under a mechanical tension of 0.1 N per thread.
  • the individual puncture needles 12 are mounted so that they can move back and forth in holes in the compression bar 5, which is shown in FIG. 7.
  • the needles 12 are coupled to a device, not shown, which gives them a movement synchronized with the movement of the compression bar 5. The synchronization These movements are carried out so that the needles are pushed out in the working position of the bar 5, while they are pushed into the holes when the bar 5 is removed from the fiber material.
  • Fig. 8 shows a discharge section of the device, which consists of a pair of sieve conveyors 13, 3.
  • the discharge section shown in Fig. 9 consists of the sieve conveyor 3 and the lower portion of the wall 6, respectively. a metal plate.
  • FIG. 10 shows the wall 6, the lower section of which fulfills the function of the discharge section and is formed from a system of wires arranged in parallel.
  • the discharge section has a separate upper wall 14, which is formed by a system of cooling tubes running in parallel with cooling liquid flowing therein.
  • the wall opens into a heated zone with a grid with holes or slots.
  • the wall 6 consists of a system of wires, which at its leading edge is provided with a system of smooth needles 15 which are arranged in a row and which enclose the angle of 60 ° with the horizontal plane. These needles 15 are intended for removing the fiber layer from the puncture needles 11 when the compression strip 5 moves back.
  • the wall 6 interacts with a series of smooth needles 16 held in a bar 17.
  • the bar 17 is a way from a device, not shown and movement is issued so that the needles 16 in the lower end position of the bar pass through the wall 6 into the discharge or compression space.
  • the back and forth movement of the bar 17 is synchronized with the similar movement of the compression bar 5 so that the needles 16 penetrate into the delivery space during the striking phase of the bar 5.
  • the needles 16 thus perform the function of a counterhold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP89110617A 1988-06-13 1989-06-12 Dispositif pour la fabrication de couches de fibres volumineuses Expired - Lifetime EP0350627B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS884102A CS269300B1 (en) 1988-06-13 1988-06-13 Device for bulky fibrous layer production
CS4102/88 1988-06-13

Publications (2)

Publication Number Publication Date
EP0350627A1 true EP0350627A1 (fr) 1990-01-17
EP0350627B1 EP0350627B1 (fr) 1994-09-14

Family

ID=5383030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89110617A Expired - Lifetime EP0350627B1 (fr) 1988-06-13 1989-06-12 Dispositif pour la fabrication de couches de fibres volumineuses

Country Status (6)

Country Link
EP (1) EP0350627B1 (fr)
AT (1) ATE111538T1 (fr)
CS (1) CS269300B1 (fr)
DD (1) DD287544A5 (fr)
DE (1) DE58908348D1 (fr)
HU (1) HUT58375A (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0498276A1 (fr) * 1991-02-01 1992-08-12 Heraklith Holding Aktiengesellschaft Procédé et installation pour la production des panneaux en fibres minérales, ainsi que ces panneaux produits en fibres minérales
EP0516964A1 (fr) * 1991-06-07 1992-12-09 INCOTEX statni podnik ekonomickoorganizacni ustav Procédé et installation pour la formation de non-tissés à partir de poils positionnées verticalement
DE4125351A1 (de) * 1991-07-31 1993-02-04 Asglawo Gmbh Textiles daemm-, isolier- und verstaerkungsmaterial
EP0558205A1 (fr) * 1992-02-26 1993-09-01 Chien Tien Sheng Méthode pour onduler et lier ou lier thermiquement un garnissage fibreuse et sa structure
DE4220338A1 (de) * 1992-06-23 1994-01-05 Malimo Maschinenbau Vliesstoff sowie Verfahren und Vorrichtung zu dessen Herstellung
US5558924A (en) * 1992-02-26 1996-09-24 Shinih Enterprise Co., Ltd Method for producing a corrugated resin-bonded or thermo-bonded fiberfill and the structure produced thereby
EP0831162A1 (fr) * 1996-09-04 1998-03-25 Shinih Enterprise Co., Ltd. Procédé pour la production d'un garnissage fibreux de densité variable, ondulé, lié à une résine ou thermiquement et la structure produite selon ledit procédé
DE19722001A1 (de) * 1997-05-27 1998-12-03 Ake Innotech Automatisierung K Vorrichtung zur Vliesbildung
EP1065307A1 (fr) * 1999-06-29 2001-01-03 I.N.T. Radko Krcma Procédé de fabrication et équipement pour la formation de textiles volumineux à partir de couches positionnées verticalement
US6588080B1 (en) 1999-04-30 2003-07-08 Kimberly-Clark Worldwide, Inc. Controlled loft and density nonwoven webs and method for producing
US6635136B2 (en) 2000-03-30 2003-10-21 Kimberly-Clark Worldwide, Inc. Method for producing materials having z-direction fibers and folds
US6867156B1 (en) 1999-04-30 2005-03-15 Kimberly-Clark Worldwide, Inc. Materials having z-direction fibers and folds and method for producing same
WO2007061300A1 (fr) * 2005-08-22 2007-05-31 Design & Polymers Bv Nappe absorbant l'huile et procede de fabrication de cette nappe
EP1853754A1 (fr) * 2005-03-02 2007-11-14 V-Lap Pty. Ltd Ourdissoir textile
WO2012038737A1 (fr) 2010-09-20 2012-03-29 John Cotton Group Limited Couche de rembourrage
ITCO20110019A1 (it) * 2011-05-24 2012-11-25 Brebey Srl Componente in fibre tessili non-tessute e relativi metodo e macchina per la sua produzione
US11192327B2 (en) * 2017-07-03 2021-12-07 Axel Nickel Voluminous meltblown nonwoven fabric with improved stackability and storability

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734943C2 (de) * 1997-08-12 2002-02-21 Thueringer Daemmstoffwerke Gmb Verfahren zur Profilierung der Oberfläche eines Verkleidungselementes mit Dämmeigenschaften
AU737343B2 (en) 1998-05-25 2001-08-16 I.N.T., Krcma Radko A device for perpendicular stratification of planary fibrous shapes
GB0314406D0 (en) 2003-06-20 2003-07-23 Wellman Internat Ltd Padded structure
DE102009033817A1 (de) 2009-07-18 2011-01-20 Manfred Hunger Vorrichtung zur Herstellung von Polfaser-Vlieswirkstoff mit großer Polhöhe
WO2017000030A1 (fr) * 2015-06-30 2017-01-05 Everbright Innovations Pty Ltd Appareil permettant de fabriquer des voiles fibreux plissés et procédé
IT202100005756U1 (it) * 2021-12-14 2023-06-14 Brebey Soc Cooperativa Componente ottimizzato in fibre tessili a base naturale non tessute

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689811A (en) * 1950-06-12 1954-09-21 Us Army Corrugated fibrous battings
FR1195940A (fr) * 1957-05-15 1959-11-20 Procédé et dispositif pour la formation d'une nappe de matériau fibreux
FR1438468A (fr) * 1965-03-25 1966-05-13 Btb Benoit Tapis Brosse Procédé pour la fabrication de tissus à poils et machine permettant sa mise en oeuvre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2689811A (en) * 1950-06-12 1954-09-21 Us Army Corrugated fibrous battings
FR1195940A (fr) * 1957-05-15 1959-11-20 Procédé et dispositif pour la formation d'une nappe de matériau fibreux
FR1438468A (fr) * 1965-03-25 1966-05-13 Btb Benoit Tapis Brosse Procédé pour la fabrication de tissus à poils et machine permettant sa mise en oeuvre

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0498276A1 (fr) * 1991-02-01 1992-08-12 Heraklith Holding Aktiengesellschaft Procédé et installation pour la production des panneaux en fibres minérales, ainsi que ces panneaux produits en fibres minérales
EP0516964A1 (fr) * 1991-06-07 1992-12-09 INCOTEX statni podnik ekonomickoorganizacni ustav Procédé et installation pour la formation de non-tissés à partir de poils positionnées verticalement
DE4125351C2 (de) * 1991-07-31 2000-08-03 Asglawo Gmbh Stoffe Zum Daemme Verfahren zur Herstellung von textilem Dämm- und/oder Isolier- und/oder Verstärkungsmaterial
DE4125351A1 (de) * 1991-07-31 1993-02-04 Asglawo Gmbh Textiles daemm-, isolier- und verstaerkungsmaterial
EP0558205A1 (fr) * 1992-02-26 1993-09-01 Chien Tien Sheng Méthode pour onduler et lier ou lier thermiquement un garnissage fibreuse et sa structure
US5558924A (en) * 1992-02-26 1996-09-24 Shinih Enterprise Co., Ltd Method for producing a corrugated resin-bonded or thermo-bonded fiberfill and the structure produced thereby
DE4220338A1 (de) * 1992-06-23 1994-01-05 Malimo Maschinenbau Vliesstoff sowie Verfahren und Vorrichtung zu dessen Herstellung
DE4220338C2 (de) * 1992-06-23 2000-09-07 Mayer Malimo Textilmaschf Verfahren und Vorrichtung zur Herstellung eines großvolumigen Vliesstoffes
DE4244904C2 (de) * 1992-06-23 1999-04-22 Mayer Malimo Textilmaschf Verfahren zur Herstellung eines großvolumigen Vliesstoffes
EP0831162A1 (fr) * 1996-09-04 1998-03-25 Shinih Enterprise Co., Ltd. Procédé pour la production d'un garnissage fibreux de densité variable, ondulé, lié à une résine ou thermiquement et la structure produite selon ledit procédé
DE19722001C2 (de) * 1997-05-27 1999-08-12 Ake Innotech Automatisierung K Vorrichtung zur Vliesbildung
DE19722001A1 (de) * 1997-05-27 1998-12-03 Ake Innotech Automatisierung K Vorrichtung zur Vliesbildung
US6867156B1 (en) 1999-04-30 2005-03-15 Kimberly-Clark Worldwide, Inc. Materials having z-direction fibers and folds and method for producing same
US6588080B1 (en) 1999-04-30 2003-07-08 Kimberly-Clark Worldwide, Inc. Controlled loft and density nonwoven webs and method for producing
US6998164B2 (en) 1999-04-30 2006-02-14 Kimberly-Clark Worldwide, Inc. Controlled loft and density nonwoven webs and method for producing same
EP1065307A1 (fr) * 1999-06-29 2001-01-03 I.N.T. Radko Krcma Procédé de fabrication et équipement pour la formation de textiles volumineux à partir de couches positionnées verticalement
US6635136B2 (en) 2000-03-30 2003-10-21 Kimberly-Clark Worldwide, Inc. Method for producing materials having z-direction fibers and folds
EP1853754A1 (fr) * 2005-03-02 2007-11-14 V-Lap Pty. Ltd Ourdissoir textile
JP2008538130A (ja) * 2005-03-02 2008-10-09 ヴィー−ラップ ピーティーワイ． エルティーディー． テキスタイルラップ装置
EP1853754A4 (fr) * 2005-03-02 2011-04-13 V Lap Pty Ltd Ourdissoir textile
WO2007061300A1 (fr) * 2005-08-22 2007-05-31 Design & Polymers Bv Nappe absorbant l'huile et procede de fabrication de cette nappe
WO2012038737A1 (fr) 2010-09-20 2012-03-29 John Cotton Group Limited Couche de rembourrage
GB2498302A (en) * 2010-09-20 2013-07-10 John Cotton Group Ltd A padding layer
GB2498302B (en) * 2010-09-20 2015-05-06 John Cotton Group Ltd A padding layer
ITCO20110019A1 (it) * 2011-05-24 2012-11-25 Brebey Srl Componente in fibre tessili non-tessute e relativi metodo e macchina per la sua produzione
WO2012160547A1 (fr) * 2011-05-24 2012-11-29 Brebey S.R.L. Composant constitué de fibres textiles naturelles non tissées, procédé et machine pour sa production
US11192327B2 (en) * 2017-07-03 2021-12-07 Axel Nickel Voluminous meltblown nonwoven fabric with improved stackability and storability

Also Published As

Publication number Publication date
CS410288A1 (en) 1989-09-12
DE58908348D1 (de) 1994-10-20
EP0350627B1 (fr) 1994-09-14
ATE111538T1 (de) 1994-09-15
CS269300B1 (en) 1990-04-11
HUT58375A (en) 1992-02-28
DD287544A5 (de) 1991-02-28

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