WO2003104535A1 - Dispositif de filature - Google Patents

Dispositif de filature Download PDF

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Publication number
WO2003104535A1
WO2003104535A1 PCT/IB2002/002932 IB0202932W WO03104535A1 WO 2003104535 A1 WO2003104535 A1 WO 2003104535A1 IB 0202932 W IB0202932 W IB 0202932W WO 03104535 A1 WO03104535 A1 WO 03104535A1
Authority
WO
WIPO (PCT)
Prior art keywords
support body
plug means
spinning device
opening
plug
Prior art date
Application number
PCT/IB2002/002932
Other languages
English (en)
Inventor
Massimiliano Bert
Luca Codeluppi
Original Assignee
Tecnofil Srl
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 Tecnofil Srl filed Critical Tecnofil Srl
Priority to AU2002368005A priority Critical patent/AU2002368005A1/en
Priority to PCT/IB2002/002932 priority patent/WO2003104535A1/fr
Publication of WO2003104535A1 publication Critical patent/WO2003104535A1/fr

Links

Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D4/00Spinnerette packs; Cleaning thereof
    • D01D4/02Spinnerettes
    • D01D4/027Spinnerettes containing inserts

Definitions

  • the invention generally relates to the art of producing continuous filaments, or filament yarns, of synthetic or semi-synthetic polymer compositions by forcing a generally fluid polymer composition through a spinneret and recovering the filaments or yarns obtained in this manner.
  • the invention relates to a spinning device for use as a spinneret.
  • Filament production by spinning is, in essence, an extrusion technique and the specifics of the extrusion die depend upon various parameters, one of them being the way in which the polymer composition is brought into a fluid state, i.e. whether a melt spinning, solution spinning, or gel spinning process is involved. This, in turn, depends upon the type of polymer used. Accordingly, the specifics of the spinneret will be dictated by the spinning method, e.g. the temperature and pressure conditions required for commercial production of filaments from the a given polymer composition and the type of filament, or filament use, required.
  • extrusion dies or spinnerets used for filament production must be capable, on the one hand, to withstand the conditions of pressure, temperature as well as specific properties, e.g. acidity, of the fluidized polymer composition, and to be capable, on the other hand, of yielding the required number of filaments with the required filament properties, e.g. tex count and/or cross-sectional shape of the filaments, at the speed and with the reliability needed for commercial filament production.
  • Adaptation of a spinneret for a given spinning method and the operating condi- tions required for such method is conventional and is not a primary goal of the present invention. Rather, the invention aims at generally avoiding a major deficiency of conventional spinnerets for virtually all types of spinning methods, i.e. the essentially immutable definition of the spinning orifices by the openings that extend through the body of the spinneret from an entry side to an exit side, generally in a direction transverse to the main plane of the spinneret body.
  • the invention aims at providing a spinning device of the type just mentioned where damaged orifices can be easily repaired and/or modified by replacement.
  • a spinning device having:
  • a support body e.g. a plate-shaped structure, capable of withstanding the operational parameters of a given spinning method regarding resistance against temperature and characteristics of the processed polymer composition and, specifically, to the pressure differential between an input pressure and output pressure, i.e. a relatively higher pressure at the entry or upstream side of the spinning device (the side closer to the source of the fluid polymer composition, e.g. an extruder, pump or other pressure-generating source), typically in the range from about 10 to about 200 bar for melt spinning and about 1 to about
  • a lower pressure e.g. ambient pressure or sub-atmospheric pressures including vacuum
  • the entry side surface of the support body is exposed to the input pressure while the support body's exit side is opposite to the entry side; (B) at least one opening provided in the support body and extending from the entry side to the exit side; while a spinning device according to the invention may have just one opening, a preferred embodiment of the inventive spinning device will have a plurality or even a multiplicity of such openings, typically at least 4 and preferably at least about 40 such openings; an upper limit, e.g.
  • the size of the plug means explained below, and the size of the support body which may have a round (including circular) or polygonal shape with a diameter or side dimension in the typical range of from about 50 to about 1000 mm and a thickness in the typical range of from about 5 to about 100 mm depending upon the characteristics of the material from which the support body is made, e.g. a structural high-performance metal, such as steel, titanium, tungsten, molybdenum and alloys thereof; carbides; or ceramics; (C) a separate plug (also termed plug means) associated with each opening of the support body and releasably held therein. At least one plug has at least at least one passage extending therethrough.
  • the support body has more than one opening, some of the associated plugs may have no passages and serve merely for closing the associated opening of the support body. This may be of use, for example, if a specific array of the spinning orifices or a reduction of the number of spinning orifices for a given operation is required.
  • any given plug may have more than just one passage.
  • the exit end of each passage is shaped and dimensioned for serving as a spinning orifice.
  • it may have round (including circular) or polygonal shape of the regular or irregular type or be shaped in any other manner for achieving a required cross-sectional shape of the filaments to be produced by extrusion from the spinning device.
  • each plug will have rotational symmetry around its longitudinal axis, i.e. its central axis coinciding with or running essentially parallel to the axis through the plus's passage or passages, if any.
  • the width of a plug may be in the range of about 2 to about 50 mm, preferably about 2 to about 20 mm.
  • the passage or passages, if any, extending through a plug may have a uniform diameter but, preferably, have a larger diameter at the upstream or entry end than at the downstream or exit end, which latter end serves as a spin- ning orifice.
  • the diameter or width of the passage at the exit end of a plug typically is in the range of from about 0.1 to about 2 mm while the diameter at the entry end is in the range of from about 2 to about 10 mm.
  • the openings of the support body and the associated plugs are shaped so as to provide an intermatching function for retaining and sealingly holding the plug in the body when the entry side of the support body is under the impact of the input pressure.
  • each plug may normally be removed from the support body for re- pair, maintenance or modification of a spinning device according to the invention.
  • polymer composition as used herein is intended to refer to any synthetic or semi-synthetic organic polymer composition capable of being processed for production of continuous filaments by spinning. It includes any composition containing at least one organic polymer of synthetic or semi- synthetic provenience which can be transformed into a fluid state and may be a homopolymer, copolymer, graft polymer, or any other type of macromolecule, or a mixture of such polymers, typically accompanied by conventional additives, such as dyes, stabilizers etc. of the type known for use in filament production by spinning.
  • a preferred body has a plurality of openings, ranging from at least 4 and preferably at least about 40 openings to lO'OOO openings or more, and the corresponding spinning device will have an equal number of plugs associated with the openings; the intermatching function of the openings of the support body, on the one hand, and the associated plugs, on the other, can be provided, at least in part, by the shape of the opening and/or by the shape of the associated plug.
  • openings of the support body that receive the associated plugs may be isomorphous, this is not a critical requirement, and an inventive spinning may have a support body with different types of openings, both with regard to differing size as well as with regard to differing shapes.
  • the outer shapes, at least, of the associated plugs will have to be modified, or - alternatively - a compensating insert may be used between an opening of the support body and its associated plug. Shape and/or material of the insert, should maintain the intermatching function.
  • some of the plugs may have no passage at all and serve to block the associated opening of the support body.
  • intermatching function of the opening in the support body and its associated plug can be achieved by inter-matching conical and/or intermatching cylindrical faces and/or intermatching shoulder portions provided by the internal shape openings and the outer shape of the associated plugs.
  • interlocking devices such as matching threads, bayonet-type fitting and other known connecting devices may be used to supply or supplement the intermatching function.
  • annular sealing means may be used at the inner surface of the openings, the outer surface of the plugs, or as separate intermediate items made of a suitable material, such as a relatively soft material, such as a light metal or light metal alloy, in the shape of a ring or a tubular or conical sleeve.
  • the plugs consists, at least in part, of a ma- terial having a higher coefficient of thermal expansion than the material of the support body.
  • the coefficient of thermal expansion of the plug material should be at least about 10% and preferably at least about 30% higher then the material of the support body.
  • the coefficient of thermal expansion of the plug is about twice the corresponding value of the support body.
  • the invention provides a method of producing a spun polymer by extrusion comprising the steps of: (I) providing a spinning device as described above comprising:
  • the invention provides, e.g. as a separate commercial item, a plug means for use in a spinning device according to the invention as described above having, or not having, at least one passage extending in a substan- tially axial direction, the plug having an external shape with a portion, at least, shaped in rotational symmetiy, and wherein, the passage has an end capable of operating as a spinning orifice.
  • a portion, at least, of the plug consists of a material selected from structural high-performance metals, e.g. steel, titanium, tungsten, molybdenum and al- loys thereof; carbides; ceramics; glass; synthetic mineral materials, e.g. ruby or sapphire; temperature-resistant synthetic polymers, e.g. commercially available polyimides or poly hetero-hetero ketones; and graphite.
  • structural high-performance metals e.g. steel, titanium, tungsten, molybdenum and al- loys thereof
  • carbides e.g. steel, titanium, tungsten, molybdenum and al- loys thereof
  • ceramics e.g. ruby or sapphire
  • temperature-resistant synthetic polymers e.g. commercially available polyimides or poly hetero-hetero ketones
  • graphite e.g. commercially available polyimides or poly hetero-hetero ketones
  • the invention provides a spinning system or plant comprising a source of a polymer composition, a spinning device as disclosed above for use as a spinneret typically provided in a housing connected with the source of the fluid polymer composition; a pump, e.g. an extruder or solution pump for forcing the fluid polymer composition through the spinneret; means for allowing solidification of the fluid polymer composition after having passed the spinneret and for forming filaments of the polymer composition; and means for recovering the filaments.
  • a spinning system or plant comprising a source of a polymer composition, a spinning device as disclosed above for use as a spinneret typically provided in a housing connected with the source of the fluid polymer composition; a pump, e.g. an extruder or solution pump for forcing the fluid polymer composition through the spinneret; means for allowing solidification of the fluid polymer composition after having passed the spinneret and for forming filaments of the polymer composition; and means for recovering the filaments.
  • Figure 1 is a diagrammatic sectional view of a broken-away portion of a support body having an opening and an associated plug according to the invention illustrating an example of the concept of an inter-matching relation between opening an associated plug
  • Figure 2 is another diagrammatic sectional view similar to Fig. 1 showing a modification of the intermatching relation between opening and plug according to the invention
  • Figure 3a is another diagrammatic sectional view similar to Figs. 1 and 2 combining differing types of the intermatching relation between opening and plug according to the invention
  • Figure 3b is a semi-diagrammatic sectional view with an intermatching arrangement of body and plug similar to Fig. 3 a but including a less diagrammatic illustration of the shape of the passage that extends through the plug
  • Figure 4 is a modification of the plug illustrated in Fig. 1 with two essentially parallel passages provided in one and the same plug instead of just one passage or no passage;
  • Figure 5 is a diagrammatic sectional view illustrating various dimensional parameters of essential components of the invention
  • Figure 6 is diagrammatic view of a spinning device according to the invention arranged in a spinning chamber.
  • Fig. 1 shows a partial sectional view of a support body 10 having an upper, up- stream, or entry side 101, a lower, downstream or exit side 102, and an opening 103 extending in a generally frustro-conical manner from the entry side to the exit side of support body 10.
  • a plug 11 with an intermatching frustroconical shape is inserted into support body 10 and has a passage 113 that extend from the upper or entry side of plug 11 to its exit side 112.
  • passage 113 would not normally have a uniform tubular shape but have its lower end narrowed down to form a spinning orifice.
  • Fig. 2 corresponds essentially with Fig. 1 by showing a support body 20 with an opening 203 having a tubular upper portion extending downward from upper face 201, a central shoulder portion, and another tubular portion ending in lower face 202.
  • Plug 21 with its passage 213 has an outer shape for inter-matching with opening 203.
  • Fig. 3 a corresponds essentially with Figs. 1 and 2 by comprising support 20 having an opening 303 for inter-matching with plug 31 but combining a frustro-conical section extending downwards from upper face 301 with a central shoulder and a lower tubular portion opening into lower face 302.
  • Fig. 3b is a semi-diagrammatic rendering of a structure essentially as illustrated in Fig. 3 a but indicating an annular sealing member 35 inserted between opening 303 a of body 30a and plug 31a.
  • the passage extending through plug 3 la is shown to have a wider conical entry portion 34 at the upper or entry end, and a spinning orifice having a substantially smaller diameter at the lower or exit end.
  • Fig.4 corresponds essentially with Fig. 1 except that plug 41 is provided with two passages 413,414.
  • Fig. 5 is shown to indicate typical dimensional parameters as follows:
  • A indicates the thickness parameter of a support body 10 ...40 and preferably is within the range of from about 15 - 35 mm with a typical thickness of 21 mm.
  • B is the diameter of an opening 103...403 at the upper or entry side 101...401 of the support body and preferably is in the range of from about 9 - 14 mm with a typical diameter of about 11 mm.
  • C is the diameter of opening 103...403 at the lower or exit side 102...402 and preferably is in the range of from about 8 - 12 mm with a typical value of about 9 mm.
  • D is the widest diameter of passage 113...413 of a plug 11...41 at the upper or entry side 111...411 and preferably is in the range of from about 4 - 10 mm with a typical value of about 5 mm.
  • Dl is the diameter of passage 113...413 in its central portion between upper side 111....411 of plug 11...41 and preferably is in the range of from about 2 -5 mm with a typical value of about 3 mm.
  • D2 is the diameter of passage 113...413 at the lower or exit side 112...412 of plug 11...41 and preferably is in the range of from about 0.3 to about 2 mm with a typical value of about 1.3 mm.
  • Fig. 6 is a diagrammatic sectional view of the bottom part of a spinning chamber
  • an inserted spinning device according to the invention formed by a plate-shaped support body 50 and differing types of inter-matching plugs 51,54 with a single passage per plug, plugs 53 with no passage to provide for blockage, and plugs 55 with more than one passage per plug.
  • selection of materials for use in a support body and a plug according to the invention will depend substantially from the process parameters of the spinning process in which a spinning device according to the invention is used. Generally, those materials known to be suitable for conventional spinnerets for a given spinning process will also be suitable for a spin- ning device according to the invention. The same materials, or differing materials, can be used for the support body as well as for the plugs.
  • spinning channels and spinning orifices will also depend primarily upon the nature of the fluid polymer composition, its viscosity including structural viscosity, chemical properties, and temperature, and - again - shapes of spinning channels and spinning orifices known to be suitable for conventional spinnerets will be suitable for spinning devices according to the invention with the characteristic difference that spinning channels and spinning orifices are not an integral part of the support body but are incorporated in the inter-matching plugs that can be inserted and withdrawn for maintenance, replacement, or adaptation as needed or desired in view of requirements of the spinning process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

L'invention concerne un dispositif de filature comprenant un support (30a) pouvant résister à une pression opérationnelle entre une pression d'entrée et une pression de sortie et présentant un côté (34) d'entrée destiné à être exposé à la pression d'entrée, et un côté (36) de sortie opposé au côté d'entrée; au moins une ouverture (303a) située dans le support et s'étendant du côté d'entrée au côté de sortie; au moins un élément (31a) d'obturation adapté à ladite ouverture et comprenant au moins un passage s'étendant dans l'élément d'obturation, ladite ouverture du support et l'élément d'obturation étant adaptés à une fonction d'interadaptation de manière à retenir et à fixer de manière étanche l'élément d'obturation dans le support lorsque le côté d'entrée du support se trouve sous l'impact de la pression d'entrée.
PCT/IB2002/002932 2002-06-10 2002-06-10 Dispositif de filature WO2003104535A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002368005A AU2002368005A1 (en) 2002-06-10 2002-06-10 Spinning device
PCT/IB2002/002932 WO2003104535A1 (fr) 2002-06-10 2002-06-10 Dispositif de filature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2002/002932 WO2003104535A1 (fr) 2002-06-10 2002-06-10 Dispositif de filature

Publications (1)

Publication Number Publication Date
WO2003104535A1 true WO2003104535A1 (fr) 2003-12-18

Family

ID=29726845

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/002932 WO2003104535A1 (fr) 2002-06-10 2002-06-10 Dispositif de filature

Country Status (2)

Country Link
AU (1) AU2002368005A1 (fr)
WO (1) WO2003104535A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2576875A1 (fr) * 2010-05-26 2013-04-10 Bayer Innovation GmbH Filière

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB749750A (en) * 1952-10-10 1956-05-30 Johnson Matthey Co Ltd Improvements in and relating to spinnerets
GB1126609A (en) * 1966-07-20 1968-09-11 Du Pont Spinneret
JPS5234015A (en) * 1975-09-05 1977-03-15 Unitika Ltd Melt spinning of synthetic fibers
US5388980A (en) * 1991-02-27 1995-02-14 Kyocera Corporation Spinning nozzle tip structure
JPH1088416A (ja) * 1996-09-13 1998-04-07 Japan Steel Works Ltd:The ノズル
JP2000064114A (ja) * 1998-08-12 2000-02-29 Sanyo Seiki:Kk 紡糸用ノズル装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB749750A (en) * 1952-10-10 1956-05-30 Johnson Matthey Co Ltd Improvements in and relating to spinnerets
GB1126609A (en) * 1966-07-20 1968-09-11 Du Pont Spinneret
JPS5234015A (en) * 1975-09-05 1977-03-15 Unitika Ltd Melt spinning of synthetic fibers
US5388980A (en) * 1991-02-27 1995-02-14 Kyocera Corporation Spinning nozzle tip structure
JPH1088416A (ja) * 1996-09-13 1998-04-07 Japan Steel Works Ltd:The ノズル
JP2000064114A (ja) * 1998-08-12 2000-02-29 Sanyo Seiki:Kk 紡糸用ノズル装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 197717, Derwent World Patents Index; Class A32, AN 1977-29905Y, XP002231571 *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 09 31 July 1998 (1998-07-31) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 05 14 September 2000 (2000-09-14) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2576875A1 (fr) * 2010-05-26 2013-04-10 Bayer Innovation GmbH Filière
US10081884B2 (en) 2010-05-26 2018-09-25 Bayer Intellectual Property Gmbh Method of producing a filament comprising a silica gel-fiber

Also Published As

Publication number Publication date
AU2002368005A1 (en) 2003-12-22

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