EP0325116A2 - Procédé de fabrication de fibres très fines de polymères - Google Patents

Procédé de fabrication de fibres très fines de polymères Download PDF

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Publication number
EP0325116A2
EP0325116A2 EP89100124A EP89100124A EP0325116A2 EP 0325116 A2 EP0325116 A2 EP 0325116A2 EP 89100124 A EP89100124 A EP 89100124A EP 89100124 A EP89100124 A EP 89100124A EP 0325116 A2 EP0325116 A2 EP 0325116A2
Authority
EP
European Patent Office
Prior art keywords
melt
bar
gas
fibers
nozzle head
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
EP89100124A
Other languages
German (de)
English (en)
Other versions
EP0325116B1 (fr
EP0325116A3 (en
Inventor
Wolfram Dr. Wagner
Peter Roger Dipl.-Ing. Nyssen
Dirk Dipl.-Ing. Berkenhaus
Hans-Theo Van Pey
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Priority to AT89100124T priority Critical patent/ATE73507T1/de
Publication of EP0325116A2 publication Critical patent/EP0325116A2/fr
Publication of EP0325116A3 publication Critical patent/EP0325116A3/de
Application granted granted Critical
Publication of EP0325116B1 publication Critical patent/EP0325116B1/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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • 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
    • D01D5/18—Formation of filaments, threads, or the like by means of rotating spinnerets
    • 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
    • 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
    • D04H3/08—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

Definitions

  • the invention relates to a process for the production of finely long fine polymer fibers with an average fiber diameter of 0.1 to 10 ⁇ m, preferably 0.1 to 4 ⁇ m, from thermoplastic polymers.
  • the method is based on the fact that the molten polymer is spun in a rotating nozzle head from a plurality of outlet bores radially with the formation of fibers and the fibers formed are deposited as a fleece on a support.
  • EP-0 168 817 describes a centrifugal spinning process in which the melt is apparently introduced under pressure into a nozzle rotating at a relatively low peripheral speed. As a result, relatively coarse threads can be produced continuously. A stretching of the threads beyond a centrifugal delay due to a gas dynamic effect does not take place.
  • the object of the invention is to use the centrifugal or centrifugal spinning process to produce very fine polymer fibers from thermoplastic polymers.
  • Fine polymer fibers are understood to mean fibers with an average diameter of 0.1 ⁇ m to 10 ⁇ m, preferably 0.1 ⁇ m to 4 ⁇ m, and a finite fiber length.
  • the process should be able to be used within a wide viscosity range of 20 Pas to 1000 Pas of the polymer melt and should be suitable for polymers whose melting temperature is in the range from 100 ° C to 500 ° C.
  • This task is based on the known centrifugal spinning process, in which the molten polymer is thrown in a rotating nozzle head from a plurality of outlet bores radially with fiber formation is solved, according to the invention, in that the molten polymer is introduced into the nozzle head at a pre-pressure of 1 bar to 200 bar, preferably 1 bar to 50 bar, and the fibers are at a radial distance of 10 mm to 200 mm from the outlet bores a gas stream of high speed is deflected in the axial direction and at the same time stretched and stretched.
  • the melt streams emerging from the outlet bores are additionally drawn by predominantly radial components emerging from gas streams emerging in the vicinity of the outlet bores before they are caught by the deflecting gas stream having a predominantly axial component.
  • the radial gas flows are advantageously at an angle of 0 ° to 45 °, preferably 5 ° to 20 °, against the direction of the melt outlet bores and at a distance of 2 mm to 20 mm from the melt outlet bores at a flow rate of 100 m / s ejected up to 600 m / s.
  • the fibers of the deflecting gas flow at a flow speed of 50 m / s to 500 m / s at an angle of + 60 ° to -60 ° to the axis of rotation and at a radial distance of 10 mm to 200 mm from the Blown out melt outlet openings.
  • one or more gas nozzles are provided, each of which is arranged around the melt outlet openings.
  • melt streams are expediently thrown out of the outlet bores at an angle of 45 ° to 90 ° to the axis of rotation.
  • such a centrifugal acceleration is generated in a chamber upstream of the melt outlet openings that a pressure of 1 bar to 200 bar, preferably 1 bar to 50 bar, is generated in the chamber. prevails.
  • the centrifugal acceleration acts as an additional pressure, which leads to an increase in the velocity of the melt flow in the outlet bore.
  • the ratio of the radial gas flow to the axial gas flow is set to a value between 0 and 5, preferably between 0.4 and 2.
  • the distance on which the fibers are warped can be extended if the temperature of the radially flowing gas is equal to or greater than the temperature of the melt emerging from the outlet openings. This avoids cooling of the melt streams immediately after exiting the holes; i.e. cooling will not start until later.
  • the process according to the invention has been found in particular for the production of very fine fibers made of polyurethane, polyols fin, polyamide, polyester, polycarbonate, polyphenylene sulfide and thermotropic LC polymers are proven.
  • the process is not limited to a relatively narrow viscosity range, but allows the processing of polymer melts in a viscosity range from 20 Pas to 1000 Pas. Furthermore, the process allows the production of very fine fibers from polymers, the decomposition temperature of which is only slightly above the solidification temperature of the melt. In practice, this means that polymers can also be processed that have only a small temperature range that can be used for thread formation.
  • the fibers produced by the process according to the invention also have excellent mechanical properties (high strength) and can be further processed into nonwovens without any problems.
  • polymer granules 1 are melted in an extruder 2 and passed under a constantly regulated pressure in the range from 1 to 200 bar via a rotating seal 3 into a central, rotating melt channel 4 in a housing 5 which is also used for storage.
  • the melt channel 4 is connected to a rotating nozzle head 6, the speed of which is in the range from 1000 to 11,000 rpm, preferably 3000 to 11,000 rpm.
  • the melt emerges radially from the nozzle head 6 through small bores at an angle of 45 ° to 90 ° to the axis of rotation.
  • the drive of the rotating nozzle head 6 with the melt channel 4 opening into it is carried out by a motor 17 with an associated V-belt transmission 18.
  • the heating of the nozzle head 6 is expediently carried out by electrical induction, while the melt channel 4 in the bearing area 5 is heated by resistance heating wires.
  • the deflecting gas 7, 8 is fed to the nozzle head 6 via the connections 19, 20.
  • the melt streams emerging from the outlet bores in the nozzle head 6 are additionally drawn by radial gas streams before they are caught by the deflecting gas streams 7, 8.
  • the rotating nozzle head 6 has been further developed.
  • the polymer melt 21 is here at a temperature above the physical melt temperature required to set the desired viscosity with a pressure of 1 to 200 bar into the central rotating melt channel 4 and from there via radial bores 22 into a melt outlet openings 24 arranged in the nozzle head 6 upstream chamber, directed.
  • the centrifugal force causes the pressure in the pre-chamber 23 to be greater than the pressure specified by the extruder, which leads to an increase in the velocity of the melt flow in the outlet bore 24.
  • the pressure in the pre-chamber 23 is preferably 1 bar to 150 bar, so that the melt viscosity in the bore 24 is reduced by the flow and higher mass throughputs can be achieved.
  • the nozzle head is equipped with an electrical induction heater 25 heated.
  • the gas supply for the radial gas streams 26 takes place at the connection 27.
  • the pressurized gas is passed from the connection 27 into a compressed gas distribution chamber 28 and flows from there through a plurality of gas bores 29 into a compressed gas nozzle chamber 30.
  • the heated air is brought approximately to the speed of sound and flows out via the slot gap 31 in the nozzle head at almost the same speed as a radial gas stream 26. It has proven to be advantageous if the radial gas flow exits at an angle of 0 ° to 45 °, preferably 5 ° to 20 °, to the direction of the melt outlet bores 24.
  • the polymer melt streams emerging from the melt outlet openings 24 form primary threads in the centrifugal field, the heated radial gas streams 26 flowing in almost the same direction either preventing cooling or controlling them in a targeted manner and, in addition to the centrifugal distortion of the primary threads, causing gas-dynamic distortion, as a result of which very fine primary threads 9 from a few microns in diameter without demolition.
  • the gas streams 26 also prevent the primary threads 32 from sticking together and also ensure that the primary threads are not deflected prematurely in an axial direction.
  • the direction of the radial gas flows 26 is expediently chosen so that the geometric intersection of the gas flow direction with the direction of the primary threads 32 falls at a radial distance from the centrifugal axis at which the threads 32 have reached their maximum peripheral speed.
  • the primary threads 32 are gripped by a deflecting gas stream 7, 8 flowing in the axial direction and conveyed further in the axial direction.
  • the deflecting gas flows 7, 8 have a direction of + 60 ° to -60 °, preferably + 30 ° to -30 °, to the axis of rotation and a speed of 50 to 500 m / sec.
  • the deflecting gas streams 7, 8 emerging from the blow ring 33 have a temperature which is below the melt temperature, preferably below the solidification temperature, of the polymer material.
  • the primary threads 32 are cooled by the deflecting gas flows and stretched to the desired end fiber diameter. At the same time, it is torn off, so that polymer fine fibers 9 with a finite length are formed which, as described in connection with FIG. 1, are then further processed to form a fleece 15.
  • the primary threads are produced using the same method as in the device according to FIG. 2; in contrast to the method described above, the primary threads 32 are not blown on one side but on both sides by flanking radial gas streams 26 and 34.
  • two gas bores 29 and 35 emanate from the compressed gas distribution chamber 28 connected to the gas supply 27 and open into separate compressed gas nozzle chambers 30 and 36.
  • the pressure in these two chambers is in the range from 1.5 to 3 bar.
  • two separate gas outlet bores 37, 38 which are adjacent to the melt outlet opening 24, are now provided, which are connected to the compressed gas nozzle chambers 30, 36.
  • the gas flows out of the bores 37, 38 at a speed above the speed of sound radially at an angle ⁇ of 0 ° to 90 °, preferably 30 ° to 90 °, to the axis of rotation on both sides of the melt outlet opening.
  • the gas outlet bores 37, 38 each include an angle ⁇ 1 or ⁇ 2 of 0 ° to 45 °, preferably 5 ° to 20 °, with the direction of the melt outlet opening 24.
  • the direction of the radial gas jets 26, 34 flanking the primary filaments 24 is expediently chosen such that the gas jets strike the primary filament 32 at a point R where the primary filaments have not yet reached their maximum possible peripheral speed. This ensures that the primary threads 32 are distorted both by centrifugal forces and almost simultaneously by gas dynamic forces.
  • warpage is meant that the melt streams are stretched and stretched.
  • the temperature of the radial gas jets 26, 34 is in turn set so high that practically no cooling takes place on this delay line.
  • the primary threads 32 are deflected in the axial direction by axial deflecting gas flows 7, 8 emerging from the blowing ring 33.
  • the angle of the deflecting gas flows is again + 60 ° to -60 °, preferably + 30 ° to -30 °, (measured against the axis of rotation of the nozzle head).
  • the distance x of the exit point of the deflecting gas jets 7, 8 from the melt outlet opening 24 is 10 mm to 200 mm, preferably 20 mm to 100 mm.
  • the deflecting gas jets 7, 8 cause cooling, further expansion and finally the tearing of the polymer threads 9.
  • the polymer melt 21 is in turn fed through the central, rotating melt channel 4 and passed through the radial melt distribution bores 22 into the antechambers 23, which are connected to the melt outlet openings 24.
  • the nozzle head 6 is equipped with a heating winding 39 which is electrically connected via the line 40.
  • Isotactic polypropylene with an MFI 190/5 of 60 g / min was melted at a temperature of 210 ° C in the extruder.
  • the spinning or centrifugal head temperature was 260 ° C.
  • the melt pressure in the centrifugal head was 10 bar, a melt throughput of 0.9 g / min. and hole reached.
  • the centrifugal head rotated at 9700 min ⁇ 1.
  • the primary melt threads emerging from the holes were drawn with a radial hot air flow of 380 Nm3 / h and 280 ° C.
  • the fine fibers spun in this way had an average fiber diameter of 1.1 ⁇ m, a standard deviation of 0.4 ⁇ m and a fiber length of more than 50 mm. With an elongation of less than 60%, the individual fiber strength was 300 to 800 MPa.
  • Nonwovens with basis weights of 2 to 60 g / m2 were produced, which were distinguished by high uniformity, no autogenous nonwoven formation and high nonwoven strength.
  • Radial was stretched with 300 Nm3 / h and 295 ° C hot air.
  • Axial deflection was carried out with 500 Nm3 / h and 20 ° C cold air.
  • Very fine fibers with a thickness of 2 ⁇ m, a standard deviation of 0.8 ⁇ m and a long fiber were obtained.
  • the strength at an elongation of less than 40% was 400 to 900 MPa.
  • the process according to the invention is particularly suitable for the production of fine, very fine and ultra-fine fibers made of thermoplastic materials, such as polyurethane, polyolefin, polyamide, polyester or thermotropic LC polymers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP89100124A 1988-01-16 1989-01-05 Procédé de fabrication de fibres très fines de polymères Expired - Lifetime EP0325116B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89100124T ATE73507T1 (de) 1988-01-16 1989-01-05 Verfahren zur herstellung von feinstpolymerfasern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3801080A DE3801080A1 (de) 1988-01-16 1988-01-16 Verfahren zur herstellung von feinstpolymerfasern
DE3801080 1988-01-16

Publications (3)

Publication Number Publication Date
EP0325116A2 true EP0325116A2 (fr) 1989-07-26
EP0325116A3 EP0325116A3 (en) 1989-12-06
EP0325116B1 EP0325116B1 (fr) 1992-03-11

Family

ID=6345374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100124A Expired - Lifetime EP0325116B1 (fr) 1988-01-16 1989-01-05 Procédé de fabrication de fibres très fines de polymères

Country Status (6)

Country Link
US (1) US4937020A (fr)
EP (1) EP0325116B1 (fr)
JP (1) JPH01213406A (fr)
AT (1) ATE73507T1 (fr)
DE (2) DE3801080A1 (fr)
ES (1) ES2030214T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453819A1 (fr) * 1990-04-12 1991-10-30 Bayer Ag Procédé de fabrication de nappes de fibres très fines de polymères thermoplastiques
EP0601277A1 (fr) * 1992-12-10 1994-06-15 Firma Carl Freudenberg Procédé et installation pour la fabrication d'un "spunbonded"
CN104178830A (zh) * 2014-08-13 2014-12-03 杭州大铭光电复合材料研究院有限公司 离心静电纺纳米纤维的连续收集装置

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DE3810596A1 (de) * 1988-03-29 1989-10-12 Bayer Ag Feinstfasern aus polyphenylsulfid
US5242633A (en) * 1991-04-25 1993-09-07 Manville Corporation Method for producing organic fibers
US5230905A (en) * 1991-06-14 1993-07-27 Fare' S.P.A. Polymer extruding device
DE4241514C2 (de) * 1992-12-10 1995-09-07 Freudenberg Carl Fa Verfahren zur Herstellung eines mit Dipolen beladenen Flächengebildes und Vorrichtung zur Durchführung des Verfahrens
US5523031A (en) * 1994-12-23 1996-06-04 Owens-Corning Fiberglas Technology, Inc. Method for fiberizing mineral material with organic material
US5622671A (en) * 1995-12-12 1997-04-22 Owens-Corning Fiberglass Technology, Inc. Hollow polymer fibers using rotary process
WO2001032292A1 (fr) 1999-10-29 2001-05-10 Hollingsworth & Vose Company Milieu filtrant
JP4621658B2 (ja) * 2003-04-03 2011-01-26 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー 均質な材料を形成させるためのローター式方法
US8487156B2 (en) 2003-06-30 2013-07-16 The Procter & Gamble Company Hygiene articles containing nanofibers
JP4393513B2 (ja) * 2003-06-30 2010-01-06 ザ プロクター アンド ギャンブル カンパニー ナノファイバーウェブにおける微粒子
US20040266300A1 (en) * 2003-06-30 2004-12-30 Isele Olaf Erik Alexander Articles containing nanofibers produced from a low energy process
MX296137B (es) * 2003-06-30 2012-02-13 Procter & Gamble Tramas de nanofibras recubiertas.
US8395016B2 (en) 2003-06-30 2013-03-12 The Procter & Gamble Company Articles containing nanofibers produced from low melt flow rate polymers
DE602005026640D1 (de) * 2004-04-19 2011-04-14 Procter & Gamble Gegenstände mit nanofasern als barrieren
WO2005103355A1 (fr) 2004-04-19 2005-11-03 The Procter & Gamble Company Fibres, non-tisses et articles contenant des nanofibres obtenues de polymeres a distribution de poids moleculaire etendue
JP4834659B2 (ja) * 2004-04-19 2011-12-14 ザ プロクター アンド ギャンブル カンパニー 高ガラス転移温度ポリマー類から製造されるナノファイバーを含有する繊維、不織布及び物品
US8303874B2 (en) * 2006-03-28 2012-11-06 E I Du Pont De Nemours And Company Solution spun fiber process
US8277711B2 (en) * 2007-03-29 2012-10-02 E I Du Pont De Nemours And Company Production of nanofibers by melt spinning
WO2009055413A1 (fr) * 2007-10-23 2009-04-30 Ppg Industries Ohio, Inc. Fabrication d'une fibre par filage électromécanique
JP5216551B2 (ja) * 2008-11-21 2013-06-19 パナソニック株式会社 ナノファイバ製造装置、ナノファイバ製造方法
WO2010105352A1 (fr) 2009-03-16 2010-09-23 Gabae Technologies, Llc Appareil, systèmes et procédés de production de particules à l'aide de capillaires rotatifs
US20160168756A1 (en) 2013-07-05 2016-06-16 The North Face Apparel Corp. Forcespinning of fibers and filaments
HK1244519B (zh) 2014-11-10 2020-03-20 北面服饰公司 通过射流挤出工艺形成的鞋类以及其他制品
JP6425023B2 (ja) * 2015-01-14 2018-11-21 パナソニックＩｐマネジメント株式会社 極細繊維生成方法及び生成装置
TWI602965B (zh) * 2015-01-22 2017-10-21 財團法人紡織產業綜合研究所 紡織設備以及使用其製作熔噴纖維的方法

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US4237081A (en) * 1978-04-03 1980-12-02 Gulf Oil Corporation Method for preparation of fibrils
US4277436A (en) * 1978-04-26 1981-07-07 Owens-Corning Fiberglas Corporation Method for forming filaments
EP0019383B1 (fr) * 1979-05-15 1982-06-23 Imperial Chemical Industries Plc Procédé de filage
US4246017A (en) * 1979-11-16 1981-01-20 Owens-Corning Fiberglas Corporation Method and apparatus for forming mineral fibers
NL187915C (nl) * 1981-02-16 1992-02-17 Sten Halvor Harsem Werkwijze voor het spinnen van vezels en inrichting voor het uitvoeren van deze werkwijze.
US4790736A (en) * 1984-07-20 1988-12-13 John E. Benoit Apparatus for centrifugal fiber spinning with pressure extrusion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453819A1 (fr) * 1990-04-12 1991-10-30 Bayer Ag Procédé de fabrication de nappes de fibres très fines de polymères thermoplastiques
EP0601277A1 (fr) * 1992-12-10 1994-06-15 Firma Carl Freudenberg Procédé et installation pour la fabrication d'un "spunbonded"
CN104178830A (zh) * 2014-08-13 2014-12-03 杭州大铭光电复合材料研究院有限公司 离心静电纺纳米纤维的连续收集装置

Also Published As

Publication number Publication date
DE3801080A1 (de) 1989-07-27
ATE73507T1 (de) 1992-03-15
JPH01213406A (ja) 1989-08-28
US4937020A (en) 1990-06-26
EP0325116B1 (fr) 1992-03-11
DE58900934D1 (de) 1992-04-16
ES2030214T3 (es) 1992-10-16
EP0325116A3 (en) 1989-12-06

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