ES357345A1 - A process for melt spinning hollow filaments and spinnerets for use therewith - Google Patents

A process for melt spinning hollow filaments and spinnerets for use therewith

Info

Publication number
ES357345A1
ES357345A1 ES357345A ES357345A ES357345A1 ES 357345 A1 ES357345 A1 ES 357345A1 ES 357345 A ES357345 A ES 357345A ES 357345 A ES357345 A ES 357345A ES 357345 A1 ES357345 A1 ES 357345A1
Authority
ES
Spain
Prior art keywords
spinneret
orifices
orifice
polymer
area
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
Application number
ES357345A
Other languages
Spanish (es)
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.)
Allied Corp
Original Assignee
Allied Chemical Corp
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 Allied Chemical Corp filed Critical Allied Chemical Corp
Publication of ES357345A1 publication Critical patent/ES357345A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • 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
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • 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
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor

Landscapes

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

Abstract

Hollow filaments of synthetic organic thermoplastic polymeric material are produced by melt spinning the material through a spinneret under such conditions that the " die swell factor " of the material is between 2À5 and 10, the spinneret being provided with at least one unobstructed extrusion orifice which defines, without completely surrounding, an area of the spinneret face devoid of orifices, or being provided with two or more unobstructed extrusion orifices which define, without completely surrounding, an area of the spinneret face devoid of orifices. The minimum distance between the adjacent ends or terminal portions of the circumscribing orifice or orifices is between 3 and 15 mils. (0À076 and 0À38 mm.). The molten polymeric material may be extruded through the spinneret under such conditions that the " die swell factor " of the material is between 2À5 and 10, and the average diameter, D 2 of the imperforate area of the spinneret being greater than AD 1 , wherein A is the die swell factor of the polymeric material and D 1 is the maximum orifice width in a direction radial to the centre of the imperforate area. The imperforate area may be defined by at least two separate and distinct orifices having " shape factors " greater than 1À4. D 2 may be greater then 2 AD 1 . The expression " die swell factor " is defined as the ratio of the maximum diameter of the stream of extruded polymer melt to the diameter of the orifice opening when employing a spinneret having a circular orifice sufficiently remote from any other orifices of the spinneret that the stream does not coalesce with the stream or streams extruded from any other orifice or orifices which may be present in the spinneret. The expression " shape factor " is defined as the ratio of the longest straight line which can be drawn within a cross-section of the orifice to D 1 . The molten polymeric material used may comprise a dispersion of a first polymer as a distinct discontinuous phase within a continuous phase of a second polymer. The first polymer may be a polyester such as a polyethylene terephthalate and the second polymer may be a fibre-forming polyamide such as a polycaproamide. Filaments made using these polymer dispersions may consist of a sheath containing an internal longitudinally extending cavity, the sheath comprising a continuous phase polymer containing dispersed therein a second polymer phase in the form of microfibres lying predominantly parallel with the axis of the filament. The microfibres may have a length-to-diameter ratio greater than 5. The portion of the spinneret face comprising an area devoid of orifices and defined by a single circumscribing orifice may be as shown in Fig. 9 and examples of portions of spinneret faces comprising an area devoid of orifices and defined by an arrangement of two or more orifices are shown in Figs. 2 to 8 and 13.
ES357345A 1967-08-17 1968-08-17 A process for melt spinning hollow filaments and spinnerets for use therewith Expired ES357345A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US66134867A 1967-08-17 1967-08-17
US68717067A 1967-12-01 1967-12-01

Publications (1)

Publication Number Publication Date
ES357345A1 true ES357345A1 (en) 1970-03-16

Family

ID=27098289

Family Applications (1)

Application Number Title Priority Date Filing Date
ES357345A Expired ES357345A1 (en) 1967-08-17 1968-08-17 A process for melt spinning hollow filaments and spinnerets for use therewith

Country Status (8)

Country Link
BE (1) BE719433A (en)
CH (1) CH497553A (en)
DE (1) DE1785145B2 (en)
ES (1) ES357345A1 (en)
FR (1) FR1576284A (en)
GB (1) GB1207408A (en)
LU (1) LU56726A1 (en)
NL (1) NL6811669A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4222977A (en) * 1978-05-16 1980-09-16 Monsanto Company Process to produce inorganic hollow fibers
FR2790487B1 (en) * 1999-03-02 2001-04-20 Freudenberg Carl Fa PROCESS FOR PRODUCING MULTISEGMENTED FILAMENTS OR FIBERS, AS WELL AS RESULTING FILAMENTS OR FIBERS AND TEXTILE SURFACE
CN105401236A (en) * 2015-10-26 2016-03-16 苏州明盛化纤有限公司 Novel breathable chemical fiber
EP3513880B1 (en) 2018-01-23 2021-08-25 The Procter & Gamble Company Dispensing device suitable for a foamable product
US11267644B2 (en) * 2018-11-08 2022-03-08 The Procter And Gamble Company Aerosol foam dispenser and methods for delivering a textured foam product
CN109382996B (en) * 2018-12-05 2024-04-30 无锡会通轻质材料股份有限公司 Hollow EPP bead extrusion mechanism
CN113403703A (en) * 2021-05-12 2021-09-17 江苏嘉通能源有限公司 Preparation method of quadrilateral high-hollowness polyester staple fiber

Also Published As

Publication number Publication date
GB1207408A (en) 1970-09-30
DE1785145B2 (en) 1975-09-11
DE1785145A1 (en) 1972-04-20
FR1576284A (en) 1969-07-25
LU56726A1 (en) 1968-11-21
NL6811669A (en) 1969-02-19
BE719433A (en) 1969-02-13
CH497553A (en) 1970-10-15

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