US3698610A - Process and device for the manufacture of a non-woven matted web from synthetic yarn - Google Patents

Process and device for the manufacture of a non-woven matted web from synthetic yarn Download PDF

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Publication number
US3698610A
US3698610A US833934A US3698610DA US3698610A US 3698610 A US3698610 A US 3698610A US 833934 A US833934 A US 833934A US 3698610D A US3698610D A US 3698610DA US 3698610 A US3698610 A US 3698610A
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United States
Prior art keywords
filaments
nozzle
slot nozzle
gas
wall system
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Expired - Lifetime
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US833934A
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English (en)
Inventor
Karl-Heinz Feltgen
Gunther Espanion
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.)
GARS IRWIN S
ROSSAN ANITA
SHAPIRO MICHAEL A
Bayer AG
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Bayer AG
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Assigned to DIXON ROBERT, SHAPIRO, MICHAEL A., GARS,IRWIN S. reassignment DIXON ROBERT ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MEDOW,ROBERTS
Assigned to ROSSAN, ANITA reassignment ROSSAN, ANITA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MEDOW, ROBERTS
Assigned to GARS, DIXON & SHAPIRO reassignment GARS, DIXON & SHAPIRO AMENDMENT SEE DOCUMENT FOR DETAILS. Assignors: MEDOW, ROBERTS
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    • 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 also relates to a device for performing this process which comprises a spinning head or supply rolls, followed by a doffing device, and also of a depositing device.
  • Such non-woven matted webs are manufactured from continuous filaments made from, for example, high-polymer substances, such as polyolefines, polyethylene terephthalates or polyamides.
  • non-woven textile planar structures i.e., non-woven matted or tangled webs
  • sucking filaments spun from a melt of synthetic high polymers through an ejector fed with gas or air.
  • the ejector is positioned after the point at which the filaments emerge out of the spinneret and at a distance from the latter which is sufficient to allow the filaments to solidfy. They are then blown in tangled form on to a travelling backing, special devices being provided to ensure adequate width of the webs produced and adequate uniformity of the weight per unit area over the width.
  • the gas or air jet emerges at a supersonic velocity out of a nozzle,'so as to be deflected through an angle between 1 5 and 40 and to flow along a face, the sliver or set of filaments entering the gas or air jet at the deflecting point thereof.
  • any desired number of filaments may be doffed at a'high velocity of several thousand m/min. and blown, free from bundling, on to a backing or support, for example a travelling belt.
  • the doffing effect is not achieved in accordance with the ejector principle.
  • the impulse of a high-velocity air jet is transferred, by turbulent mixing, to the secondary air accompanying the filaments to be doffed and subjected with them to suction.
  • the filaments are introduced directly into a supersonic air jet having an extremely small cross-section.
  • the invention exploits the theoretically known capability of a supersonic air jet to expand about a sharp edge. Furthermore, the so-called Coanda effect is exploited, according to which a thin high-velocity jet emerging out of a slot in a wall inclined at an angle relatively to the latter, is deflected towards the wall and flows along the latter. At that point at which the jet emerges out of the nozzle and is automatically deflected into the direction given by the wall, the set of filaments enters the jet concentrically, so that the aerodynamic forces are exploited, as doffing forces, directly, i.e., without mixing with secondary air.
  • the supplementary means generate a secondary air flow by means of which the outer or marginal filaments of the set of filaments are drawn in towards the center of the set.
  • the width of the set of filaments in the air jet is regulated in a simple manner, so as to influence the marginal zone density of the web to be produced.
  • the filaments are aligned shortly before entry into the gas or air jet, so that they enter the jet precisely in the center plane thereof.
  • a doffing device comprises walls aligned parallel to the filament doffing direction and formed with a slot nozzle which generates a supersonic jet, extends transversely over' the walls and the central plane of which is at an angle of between 15 and 40 to the entering set of filaments.
  • the slot nozzle for generating the supersonic velocity of the gas or air jet is designed as a Laval nozzle.
  • the latter is generally atmospheric pressure-there is an optimum cross-section ration F lF of the cross-sections of the nozzle, F, designating the narrowest cross-section and F the outlet cross-section.
  • a plate adjustably spaced therefrom. It is preferably mounted so as to be pivotal and lockable about an axis parallel to the slot nozzle.
  • the ends of the slot nozzle constitute, relatively to the flow pattern, singular points differing from the remaining central portion of the flow so that there exists, in these marginal zones, a tendency for undesirable bundling of the filaments, resulting in yarn formation.
  • the secondary air sucked by the rapid doffing gas jet at the marginal zones receives velocity components directed towards the center of the set of filaments, so that the marginal filaments are drawn in towards the center into the zone of the uniform,.central flow.
  • the non-woven web formed exhibits, due to the uniform filament spacing achieved in the gas jet, a filament density which is homogeneous over the entire width.
  • the secondary air mentioned here must not be confused with that secondary air which appears in the doffing devices operating in accordance with the prior-known ejector principle.
  • the entire doffing device may be guided to and fro in a manner known per se.
  • the non-woven web thus produced then exhibits for example a zig-zag or meandering structure, depending on how the traversing stroke velocity and moving belt velocity are synchronized with each other.
  • a spacer is arranged above the slot nozzle.
  • the spacer consists, most simply, of a tensioned wire having a diameter of only a few tenths of a millimeter. It is preferably applied on the walls and in this case its thickness corresponds to half the thickness of the gas et.
  • the material from which synthetic filaments are spun often contains delustring agents, for example titanium dioxide, which would exert a highly abrasive-effect on the spacer.
  • the spacer is preferably provided with a reciprocating displacement device.
  • the spacer is designed in the form of an endless wire rotating over guide pulleys.
  • FIG. 1 shows the device, in its entirety, as a lateral elevation, illustrating the doffing of filaments out of a spinning head
  • FIG. 2 shows the slot nozzle and also the spacer, in cross-section and drawn to a larger scale
  • FIG. 3 shows thedoffing device, in a perspective Synthetic filaments 3 are doffed or drawn off from a v spinning head through spinnerets 2 by means of a doffing device 4.
  • a Laval nozzle 6 Arranged in a wall system 5 is a Laval nozzle 6 before which there is arranged a pressure chamber 7.
  • the Laval nozzle 6 (FIG. 2) includes an angle of 50 with the central plane of the entering set of filaments 3.
  • the inlet cross-section F is in a predetermined ratio to the outlet cross-section F whereby supersonic velocity is imparted to the emerging gas jet 8 and the latter expands about the sharp edge 9 but remains in contact against the wall system 5.
  • an endless wire designed as a spacer l0 and rotating over guide pulleys 11 and 12 (FIG. 3.).
  • the disordered or tangled position of all the filaments is especially important. Adjacent filaments should not extend in the same direction over distances longer than corresponds to statistic probability.
  • the aforemen tioned bundling of individual filaments produces, on the contrary, an undesired, coarse-structured appearance of the web.
  • the two requirements i.e., a high doffing velocity and bundle-free depositing of the filaments during the simultaneous drawing off of a multiplicity of individual filaments in an air flow, can be satisfied only with difficul ty.
  • a device for the manufacture of a matted filament web from synethic filaments comprising spinnerets of a spinning head or supply rolls, a doffing device connected downstream therefrom, and a depositing device wherein the doffing device comprises a wall system aligned parallel to the filament doffing direction said wall system having a slot nozzle which generates a supersonic flow velocity, said slot nozzle extending transversely over the wall system and the center plane of said slot nozzle forming an angle of from about 50 to about with the center plane of the entering set of filaments and wherein a plate is arranged opposite to the wall system said plate having means for adjusting its position relative to the wall system.
  • a device characterized in that the slot nozzle is designed as a Laval nozzle.
  • a device characterized in that the plate is mounted for pivoting and locking about a pivot extending parallel to the slot nozzle.
  • a device characterized in that a spacer is arranged above the slot nozzle.
  • a device characterized in that the spacer (10) is designed as an endless wire rotating over guide pulleys.
  • ratiorf should read. ratio.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Nonwoven Fabrics (AREA)
US833934A 1968-06-22 1969-06-17 Process and device for the manufacture of a non-woven matted web from synthetic yarn Expired - Lifetime US3698610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681760713 DE1760713B2 (de) 1968-06-22 1968-06-22 Vorrichtung zum herstellen eines wirrfaden-vlieses aus synthetischen faeden

Publications (1)

Publication Number Publication Date
US3698610A true US3698610A (en) 1972-10-17

Family

ID=5696191

Family Applications (1)

Application Number Title Priority Date Filing Date
US833934A Expired - Lifetime US3698610A (en) 1968-06-22 1969-06-17 Process and device for the manufacture of a non-woven matted web from synthetic yarn

Country Status (8)

Country Link
US (1) US3698610A (de)
AT (1) AT310922B (de)
BE (1) BE734936A (de)
CH (1) CH498207A (de)
DE (1) DE1760713B2 (de)
FR (1) FR2011477A1 (de)
GB (1) GB1218009A (de)
NL (1) NL6909410A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4340563A (en) * 1980-05-05 1982-07-20 Kimberly-Clark Corporation Method for forming nonwoven webs
US4346504A (en) * 1980-07-11 1982-08-31 Hoechst Fibers Industries Yarn forwarding and drawing apparatus
WO1983001609A1 (en) * 1981-11-02 1983-05-11 Imants Reba System and method for continuoulsy preventing filament bridging between adjacent draw nozzles
US4450997A (en) * 1982-08-09 1984-05-29 Allied Corporation Winder string-up aspirator
US5045271A (en) * 1986-01-17 1991-09-03 J. H. Benecke Gmbh Process for the production of irregular non-woven material sheets
US20030147982A1 (en) * 2002-02-07 2003-08-07 Nordson Corporation Forming system for the manufacture of thermoplastic nonwoven webs and laminates
US20050082723A1 (en) * 2003-10-16 2005-04-21 Brock Thomas W. Method and apparatus for the production of nonwoven web materials
US20050087288A1 (en) * 2003-10-27 2005-04-28 Haynes Bryan D. Method and apparatus for production of nonwoven webs
US20070042662A1 (en) * 2003-11-27 2007-02-22 Noelle Frederic Machine for production of non-woven material, adjustment procedure for the same and non-woven material produced thus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD128204B1 (de) * 1976-10-11 1979-05-30 Malcomess Hans Juergen Verfahren und vorrichtung zur herstellung von elementarfadenvliesstoff
US4554716A (en) * 1984-03-21 1985-11-26 E. I. Du Pont De Nemours And Company Apparatus for tensioning and forwarding tow

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4340563A (en) * 1980-05-05 1982-07-20 Kimberly-Clark Corporation Method for forming nonwoven webs
US4346504A (en) * 1980-07-11 1982-08-31 Hoechst Fibers Industries Yarn forwarding and drawing apparatus
WO1983001609A1 (en) * 1981-11-02 1983-05-11 Imants Reba System and method for continuoulsy preventing filament bridging between adjacent draw nozzles
US4450997A (en) * 1982-08-09 1984-05-29 Allied Corporation Winder string-up aspirator
US5045271A (en) * 1986-01-17 1991-09-03 J. H. Benecke Gmbh Process for the production of irregular non-woven material sheets
US7476350B2 (en) 2002-02-07 2009-01-13 Aktiengesellschaft Adolph Saurer Method for manufacturing thermoplastic nonwoven webs and laminates
US6799957B2 (en) 2002-02-07 2004-10-05 Nordson Corporation Forming system for the manufacture of thermoplastic nonwoven webs and laminates
US20050023711A1 (en) * 2002-02-07 2005-02-03 Nordson Corporation Method for manufacturing thermoplastic nonwoven webs and laminates
US20030147982A1 (en) * 2002-02-07 2003-08-07 Nordson Corporation Forming system for the manufacture of thermoplastic nonwoven webs and laminates
US20050082723A1 (en) * 2003-10-16 2005-04-21 Brock Thomas W. Method and apparatus for the production of nonwoven web materials
WO2005040477A1 (en) * 2003-10-16 2005-05-06 Kimberly-Clark Worldwide, Inc. Method and apparatus for the production of nonwoven web materials
US7504060B2 (en) 2003-10-16 2009-03-17 Kimberly-Clark Worldwide, Inc. Method and apparatus for the production of nonwoven web materials
US20050087288A1 (en) * 2003-10-27 2005-04-28 Haynes Bryan D. Method and apparatus for production of nonwoven webs
US20070042662A1 (en) * 2003-11-27 2007-02-22 Noelle Frederic Machine for production of non-woven material, adjustment procedure for the same and non-woven material produced thus
US7530147B2 (en) * 2003-11-27 2009-05-12 Rieter Automatik Gmbh Machine for production of non-woven material, adjustment procedure for the same and non-woven material produced thus
US20090191395A1 (en) * 2003-11-27 2009-07-30 Rieter Automatik Gmbh Machine for the production of non-woven material, adjustment procedure for the same and non-woven material produced thus
US7935644B2 (en) 2003-11-27 2011-05-03 Maschinenfabrik Rieter Ag Machine for the production of non-woven material, adjustment procedure for the same and non-woven material produced thus

Also Published As

Publication number Publication date
BE734936A (de) 1969-12-01
NL6909410A (de) 1969-12-24
FR2011477A1 (de) 1970-02-27
GB1218009A (en) 1971-01-06
AT310922B (de) 1973-10-25
DE1760713B2 (de) 1973-07-05
DE1760713A1 (de) 1972-04-06
CH498207A (de) 1970-10-31

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Owner name: SHAPIRO, MICHAEL A., STATELESS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MEDOW,ROBERTS;REEL/FRAME:003914/0927

Effective date: 19811002

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Owner name: ROSSAN, ANITA 5506 LINCOLN, MORTON GROVE, IL 600

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Effective date: 19820514