EP0230541B1 - Verfahren zur Herstellung von Wirrvliesbahnen und Vorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zur Herstellung von Wirrvliesbahnen und Vorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0230541B1
EP0230541B1 EP86116157A EP86116157A EP0230541B1 EP 0230541 B1 EP0230541 B1 EP 0230541B1 EP 86116157 A EP86116157 A EP 86116157A EP 86116157 A EP86116157 A EP 86116157A EP 0230541 B1 EP0230541 B1 EP 0230541B1
Authority
EP
European Patent Office
Prior art keywords
slit
compressor
thread
dies
wall
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.)
Expired - Lifetime
Application number
EP86116157A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0230541A3 (en
EP0230541A2 (de
Inventor
Kurt Mente
Gerhard Knitsch
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.)
JH Benecke GmbH
Corovin GmbH
Original Assignee
JH Benecke GmbH
Corovin GmbH
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 JH Benecke GmbH, Corovin GmbH filed Critical JH Benecke GmbH
Priority to AT86116157T priority Critical patent/ATE62941T1/de
Publication of EP0230541A2 publication Critical patent/EP0230541A2/de
Publication of EP0230541A3 publication Critical patent/EP0230541A3/de
Application granted granted Critical
Publication of EP0230541B1 publication Critical patent/EP0230541B1/de
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
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition 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
    • D04H3/02—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
    • D04H3/03—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 at random

Definitions

  • the invention relates to a process for the production of random nonwoven webs from synthetic threads, which are drawn off as a family of threads from spinning nozzles under the influence of a gaseous propellant produced by a compressor or the like and are deposited on a base.
  • the invention also relates to a device for carrying out the method.
  • DE-PS 1 785 158, GB-PS 1 282 176 and GB-PS 1 297 582 have already disclosed methods and devices of the above type.
  • a common feature of these methods is that the family of threads is drawn out of the spinnerets under the influence of compressed air by means of a thread take-off device, stretched inside the thread take-off device and, after passing through a spreading device, is placed on the base to form a nonwoven web.
  • thread pull-off force occurring in the thread take-off device is essentially generated within a thread take-off tube, which has a thread take-off nozzle at its upper end, which is fed with highly compressed compressed air.
  • the invention achieves this goal in the generic method by the features mentioned in the characterizing part of claim 1. With regard to a device, the object is achieved by those mentioned in claim 8 Features resolved.
  • the invention surprisingly treads a completely new path, which leads away from the thread take-off tubes previously used and which instead allows the thread sheet to be drawn off and guided along a wall surface or nozzle wall formed by several slot nozzles. Since no bundling is now carried out within thread take-off tubes, the risk of twisting of individual threads is eliminated, so that random nonwoven webs with a uniform structure can be produced.
  • the invention is based on the knowledge confirmed by tests that the required thread pulling forces (measured comparatively on a copper wire of 0.12 mm diameter) of approximately 0.2 N can be generated with several slot nozzles arranged one above the other.
  • An arrangement is expedient in which the air - based on the thread conveying direction - exits the slot nozzles at an angle of approximately 15 ° or less, so that a strong force component for the tensile force occurs in the thread conveying direction.
  • Another important feature of the invention is that an adiabatic or polytropic process is exploited in a novel manner, while the known processes work isothermally.
  • the invention goes namely from the mathematically derived knowledge below that higher thread pulling forces can be achieved with the adiabatic process (among other things because of the higher viscosity of the air at higher temperatures) than with the isothermal process, which is advantageous in terms of economy of the new process.
  • the admission pressure of the slot nozzles is set somewhat larger than the critical pressure (the ratio of the admission pressure to the ambient air pressure is therefore greater than the Laval pressure ratio).
  • the resulting expansion of the air jet at the outlet of the slot nozzles advantageously lifts the thread sheet by a small amount from the flat nozzle wall, so that there is therefore no fear of twisting or sticking to the nozzle wall.
  • cooling in the form of bores is provided in the front part of the slot nozzles, through which, for example, water can be passed.
  • CH-DS 405 220 also describes a process for the production of fibrous sheet-like structures, in which thread sheets are guided along closed channels assigned to them, which serve to guide and cool the thread sheets, while the actual thread pulling forces of two acted upon by air Slits is created just below the spinneret.
  • a secondary air is introduced into the channels via obliquely arranged slots, so that the individual thread sheets are completely solidified after leaving the assigned channels and are deposited one after the other, whereby a multi-surface fiber structure is created. So that as many threads as possible are caught by the air flow, the spinnerets are designed to be relatively narrow, so that the output of the known method is correspondingly low. The application of an adiabatic or polytropic process is not addressed there.
  • a so-called flip-flop traversing is provided in an expedient embodiment, which is known per se from DE-PS 24 21 401 and in connection with the novel nozzle wall a special one ensures great uniformity of the structure.
  • 1 is a schematic cross-sectional view to illustrate the principle of a device according to the invention
  • 2 is a diagram showing the thread pulling forces
  • 3 shows a cross-sectional view of a slot nozzle with a supply pipe
  • 4 shows the different slot widths of a slot in the supply pipe
  • 5 shows a cross-sectional view along the section line A - A from FIG. 3
  • 6 shows a cross-sectional view along the section line BB from FIG. 3
  • 7 shows a cross-sectional view along the section line C - C from FIG. 3.
  • synthetic threads 12 are drawn as a family of threads from spinnerets 10 by means of an air stream directed downwards, which is generated by slot nozzles 16 arranged one above the other, which form a nozzle wall 18.
  • the threads 12 emerging from the spinnerets 10 are cooled to room temperature by means of a cross-air flow indicated by the arrows B, and the threads 12 are aligned by means of a horizontally adjustable tube 14.
  • Both the compressor and the slot nozzles 16 are operated polytropically, the compressor compressing the air from the room state polytropically to the same pressure or greater than the critical pressure of 1.894 bar.
  • the compressor, the feed lines and the rear of the slot nozzles are insulated.
  • 16 holes 20 are provided in the front part of the slot nozzles for water cooling in order to dissipate the heat.
  • the spreading device 28 comprises two oscillating Coanda shells 32 and is described in more detail in DE-PS 24 21 401, so that it does not need to be discussed further at this point.
  • the resistance coefficient c is not a constant; rather, it changes according to the equation with the Reynolds number Re.
  • the admission pressure of the slot nozzles 16 is set somewhat higher than the critical pressure, so that the expansion of the air jet which arises at the outlet slots 26 of the slot nozzles 16 lifts the thread sheet by a small amount from the nozzle wall 18.
  • the admission pressure is not chosen too high, but is kept low, if possible, since the ratio of energy expenditure to thread pulling force is more favorable with a low nozzle admission pressure.
  • the lower limit of the pre-pressure occurs where the relative speed between the threads 12 and the air is so low that the thread pulling force decreases disproportionately.
  • a preferred value of the ratio of energy expenditure to thread pulling force is between 1.1 and 5 bar.
  • FIGS. 3-7 The detailed structure of a slot nozzle 16 used in the new method and the new device is shown in FIGS. 3-7.
  • Each slot nozzle 16 has a front chamber 34 and a rear chamber 36 which are connected to one another via a gap 42 of 1.5 mm .
  • the front chamber 34 opens into the exit slot 26 via a gap 38 (1.5 mm), fins 40 being arranged in the manner of a flow grille in the feed to the exit slot 26 in order to align the turbulent flow in front of the exit slot 26.
  • In the front part of the slot nozzles 16 there are bores 20 for cooling by means of cooling water or the like, as can be seen particularly clearly in FIG. 3.
  • a supply pipe 44 the two outer pipes, extends in each slot nozzle 16 within the rear chamber 36 Ends are connected to the compressor, not shown, that is, air is supplied from both sides of the supply pipe 44.
  • the wall of the supply pipe 44 runs close to the upper and lower wall of the rear chamber 36, forming a gap 48 and 50 of approximately 1.5 mm each.
  • the supply pipe 44 has a slot 46 through which the air can escape from the compressor into the rear chamber 36.
  • the slot 46 extends along the entire length of the rear chamber 36 and has different slot widths over the length, as is shown schematically in FIG. 4.
  • the width of the slot is changed symmetrically to the center of the tube (seen in the longitudinal direction).
  • the slot width S is 2 mm, and it widens discretely towards the pipe ends to 3 and 4 mm.
  • the jumps in diameter are equalized, so that the slot 46 then continuously widens outwards from 2 mm in the middle to 4 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)
EP86116157A 1986-01-17 1986-11-21 Verfahren zur Herstellung von Wirrvliesbahnen und Vorrichtung zur Durchführung des Verfahrens Expired - Lifetime EP0230541B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116157T ATE62941T1 (de) 1986-01-17 1986-11-21 Verfahren zur herstellung von wirrvliesbahnen und vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3601201A DE3601201C1 (de) 1986-01-17 1986-01-17 Verfahren zur Herstellung von Wirrvliesbahnen und Vorrichtung zur Durchfuehrung des Verfahrens
DE3601201 1986-01-17

Publications (3)

Publication Number Publication Date
EP0230541A2 EP0230541A2 (de) 1987-08-05
EP0230541A3 EP0230541A3 (en) 1989-03-22
EP0230541B1 true EP0230541B1 (de) 1991-04-24

Family

ID=6292013

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116157A Expired - Lifetime EP0230541B1 (de) 1986-01-17 1986-11-21 Verfahren zur Herstellung von Wirrvliesbahnen und Vorrichtung zur Durchführung des Verfahrens

Country Status (6)

Country Link
US (1) US5045271A (enrdf_load_stackoverflow)
EP (1) EP0230541B1 (enrdf_load_stackoverflow)
JP (1) JPS62223361A (enrdf_load_stackoverflow)
AT (1) ATE62941T1 (enrdf_load_stackoverflow)
DE (2) DE3601201C1 (enrdf_load_stackoverflow)
ES (1) ES2022101B3 (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH027908Y2 (enrdf_load_stackoverflow) * 1987-10-12 1990-02-26
US5292239A (en) * 1992-06-01 1994-03-08 Fiberweb North America, Inc. Apparatus for producing nonwoven fabric
DE4236514C2 (de) * 1992-10-26 1997-03-27 Fischer Karl Ind Gmbh Verfahren und Vorrichtung zur Förderung und Ablage von Scharen endloser Fäden mittels Luftkräften
US5545371A (en) * 1994-12-15 1996-08-13 Ason Engineering, Inc. Process for producing non-woven webs
US5688468A (en) * 1994-12-15 1997-11-18 Ason Engineering, Inc. Process for producing non-woven webs
US5772948A (en) * 1996-11-19 1998-06-30 Plastaflex Corporation Melt-blown fiber system with pivotal oscillating member and corresponding method
US6524521B1 (en) * 1999-08-30 2003-02-25 Nippon Petrochemicals Co., Ltd. Method of and apparatus for manufacturing longitudinally aligned nonwoven fabric
JP3658284B2 (ja) * 2000-07-05 2005-06-08 ユニ・チャーム株式会社 不織布製造装置
DE50100381D1 (de) 2000-07-25 2003-08-21 Freudenberg Carl Kg Verfahren und Vorrichtung zur Herstellung eines Spinnvlieses
US20030003834A1 (en) * 2000-11-20 2003-01-02 3M Innovative Properties Company Method for forming spread nonwoven webs
JP4495871B2 (ja) * 2001-02-27 2010-07-07 新日本石油株式会社 横配列ウェブの製造方法および装置
EP1277867A1 (de) 2001-07-16 2003-01-22 Carl Freudenberg KG Verfahren und Vorrichtung zur Herstellung eines Spinnvlieses
US7172398B2 (en) * 2003-11-17 2007-02-06 Aktiengesellschaft Adolph Saurer Stabilized filament drawing device for a meltspinning apparatus and meltspinning apparatus including such stabilized filament drawing devices
US7320581B2 (en) * 2003-11-17 2008-01-22 Aktiengesellschaft Adolph Saurer Stabilized filament drawing device for a meltspinning apparatus
DE102005054726A1 (de) * 2005-08-02 2007-02-15 Carl Freudenberg Kg Vliesstoffe und Verfahren zu deren Herstellung
US8979509B2 (en) 2009-09-30 2015-03-17 Daikin Industries, Ltd. Screw compressor having reverse rotation protection

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE405220C (de) * 1923-06-05 1924-10-31 Hans Ludwig Stossdaempfer, insbesondere fuer Kraftfahrzeuge
NL270569A (enrdf_load_stackoverflow) * 1960-10-24
NL296015A (enrdf_load_stackoverflow) * 1962-05-16
CH455699A (de) * 1965-08-16 1968-07-15 Ici Ltd Verfahren zur Herstellung von verfestigten Nonwovens
DE1560800A1 (de) * 1966-02-10 1971-01-07 Lutravil Spinnvlies Verfahren und Vorrichtung zur Herstellung von Mischvliesen durch Schmelzspinnen
DE1760713B2 (de) * 1968-06-22 1973-07-05 Vorrichtung zum herstellen eines wirrfaden-vlieses aus synthetischen faeden
DE1785158C3 (de) * 1968-08-17 1979-05-17 Metallgesellschaft Ag, 6000 Frankfurt Runddiise zum Abziehen und Ablegen von Fäden zu einem Fadenvlies
DE1950669C3 (de) * 1969-10-08 1982-05-13 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur Vliesherstellung
DE2014240A1 (de) * 1970-03-25 1971-10-14 Metallgesellschaft Ag, 6000 Frankfurt Verfahren zur Herstellung unterschiedlicher Wirrvliese auf einer Produktionsanlage
DE2053918B2 (de) * 1970-11-03 1976-09-30 Basf Farben + Fasern Ag, 2000 Hamburg Verfahren und vorrichtung zur herstellung gekraeuselter faeden aus synthetischen hochpolymeren
JPS5614714B2 (enrdf_load_stackoverflow) * 1972-06-23 1981-04-06
US3836346A (en) * 1973-08-17 1974-09-17 Owens Corning Fiberglass Corp Apparatus for producing fibrous material
US3970417A (en) * 1974-04-24 1976-07-20 Beloit Corporation Twin triple chambered gas distribution system for melt blown microfiber production
DE2421401C3 (de) * 1974-05-03 1982-12-09 J.H. Benecke Gmbh, 3000 Hannover Vorrichtung zum Verteilen eines Fadenbündels bei der Spinnvlies-Herstellung
US4064605A (en) * 1975-08-28 1977-12-27 Toyobo Co., Ltd. Method for producing non-woven webs
DE2618406B2 (de) * 1976-04-23 1979-07-26 Karl Fischer Apparate- & Rohrleitungsbau, 1000 Berlin Verfahren zum Herstellen vororientierter Füamentgarne aus thermoplastischen Polymeren
US4300876A (en) * 1979-12-12 1981-11-17 Owens-Corning Fiberglas Corporation Apparatus for fluidically attenuating filaments
US4334340A (en) * 1980-01-25 1982-06-15 Crown Zellerbach Corporation System and method for dispersing filaments
US4405297A (en) * 1980-05-05 1983-09-20 Kimberly-Clark Corporation Apparatus for forming nonwoven webs
US4340563A (en) * 1980-05-05 1982-07-20 Kimberly-Clark Corporation Method for forming nonwoven webs
US4316731A (en) * 1980-09-25 1982-02-23 Owens-Corning Fiberglas Corporation Method and apparatus for producing fibers
DE3406346C2 (de) * 1983-02-25 1986-08-28 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Schmelzspinnvorrichtung zur Erzeugung einer Schar von Filamentfäden
DE3504588C1 (de) * 1985-02-11 1986-07-17 J.H. Benecke Gmbh, 3000 Hannover Vorrichtung zum Verteilen eines Fadenbuendels bei der Spinnvliesherstellung
US4600423A (en) * 1985-05-01 1986-07-15 Owens-Corning Fiberglas Corporation Method and apparatus for producing a continuous glass filament mat

Also Published As

Publication number Publication date
EP0230541A3 (en) 1989-03-22
US5045271A (en) 1991-09-03
ATE62941T1 (de) 1991-05-15
DE3678935D1 (de) 1991-05-29
EP0230541A2 (de) 1987-08-05
DE3601201C1 (de) 1987-07-09
ES2022101B3 (es) 1991-12-01
JPS62223361A (ja) 1987-10-01
JPH0215658B2 (enrdf_load_stackoverflow) 1990-04-12

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