US3293696A - Special spinnerets for obtaining yarns of synthetic linear polymers having high regularity of count and of dyability - Google Patents

Special spinnerets for obtaining yarns of synthetic linear polymers having high regularity of count and of dyability Download PDF

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Publication number
US3293696A
US3293696A US379545A US37954564A US3293696A US 3293696 A US3293696 A US 3293696A US 379545 A US379545 A US 379545A US 37954564 A US37954564 A US 37954564A US 3293696 A US3293696 A US 3293696A
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Prior art keywords
orifices
spinning
linear polymers
spinneret
count
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Expired - Lifetime
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US379545A
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English (en)
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Bruni Gaetano
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SNIA Viscosa SpA
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SNIA Viscosa SpA
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    • 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
    • D01D4/00—Spinnerette packs; Cleaning thereof
    • D01D4/02—Spinnerettes
    • 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
    • D01D5/08—Melt spinning methods

Definitions

  • spinnerets which have a plurality of orifices each one of which produces a filament or monofilament.
  • spinnerets which have their orifices arranged on circles concentric with respect to said spinneret, which ordinarily is circular.
  • the extruded filaments are normally cooled by means of a stream of air that is made to flow in a direction transverse to the direction of forward movement of the yarns.
  • spinnerets are employed wherein the orifices are arranged in a V configuration, the orifices of the spinnerets being arranged with their centres along the sides of the V.
  • the angle of aperture of the V configuration may vary between 30 and 120 and preferably between 45 and 80 and the rectilinear line connecting the sides of the V is preferably not larger than 6 mm. and preferably not smaller than 4 mm.
  • the two sides of the V may even be replaced by two curve-lined segments having a curvature not excessive.
  • the figure on which the centres of the orifices of the spinneret lie may even be asymmetrical.
  • the centres of the orifices of the spinneret are arranged in such a manner that the projections of the centres of two adjacent orifices on a plane perpendicular to the direction of flow of the cooling air, should not be smaller than 1 mm. and preferably not larger than 3 mm.
  • the shortest path connecting the two in- 3,293,696 Patented Dec. 27, 1966 clined sides of the V configuration has a length corresponding to the distance between two adjacent orifices of the spinneret, so that on said path there are no orifices not disposed also on the two inclined sides of the V, but on the other hand the invention comprises arrangements in which one or more orifices are disposed on said rectilinear path.
  • FIG. 1 represents a bottom plan view of a spinneret made according to one embodiment of the invention
  • FIG. 2 shows a spinneret of common type and corresponding in all its dimensions to the-spinneret of FIG. 1 with the sole difference that the holes are disposed uniformly along a circle instead of along a V.
  • Example holes of the two spinnerets 5.38 mm. Temperature of the spinning head (measured on the jacket and Dowtherm) 275 C. Speed of the cooling air 0.04 m./1". Temperature of the cooling air 46 C. Speed of collection of the thread 750 m./1.
  • the two fabrics were dyed with acid dyes and examined as for the-uniformity of dyeing-inthe-direction-"of the warp.
  • a spinneret for melt-spinning synthetic linear polymers in a process in which individual substantially parallel filaments are drawnfrom a plurality of spinning orifices of the spinneret in a given spinning direction through a. stream of gaseous cooling medium which impinges on said filaments in a direction essentially transverse to said-spinningdirection, said orifices being arranged in two converging rows which include an angle therebetween, the distance between. any two adjacent orifices .in either of saidr'ows being such that the projections of the centers of these two. orifices to axliue perpendicular to the direction of said stream is at least one millimeter, the rows are so disposed that a line bisecting said angle is parallel to the direction of the stream.
  • a spin-neret for melt-spinning synthetic linear polymers in a process in which individual substantially parallel filaments are drawn from a plurality of spinning orifices of the spinneret in a given spinning direction through a stream of gaseous cooling medium which impinges on said filaments in a direction essentially transverse to said spinning direction, said orifices being arranged in two converging rows which include an angle therebetween, the distance between any two adjacent orifices in either of said rows being such that the projections of the centers of these two orifices to a line perpendicular to the direction of said stream is at least one millimeter, said rows converging to an apex pointing towards the direction in which the said stream impinges on said filaments.
US379545A 1963-07-24 1964-07-01 Special spinnerets for obtaining yarns of synthetic linear polymers having high regularity of count and of dyability Expired - Lifetime US3293696A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1538663 1963-07-24

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US (1) US3293696A (de)
BE (1) BE650803A (de)
DE (1) DE1435688A1 (de)
GB (1) GB1036036A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335210A (en) * 1963-10-29 1967-08-08 Monsanto Co Filament yarn spinning apparatus and method
US4248581A (en) * 1979-09-05 1981-02-03 Allied Chemical Corporation Spinnerette
US4283364A (en) * 1977-05-04 1981-08-11 Akzona Incorporated Melt spinning of synthetic yarns
US4514350A (en) * 1982-09-23 1985-04-30 Celanese Corporation Method for melt spinning polyester filaments
US4605364A (en) * 1982-09-23 1986-08-12 Celanese Corporation Melt-spinning apparatus for polyester filaments

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2742667A (en) * 1951-11-08 1956-04-24 Rhodiaceta Spinnerets
US3115385A (en) * 1962-09-19 1963-12-24 Du Pont Quenching process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2742667A (en) * 1951-11-08 1956-04-24 Rhodiaceta Spinnerets
US3115385A (en) * 1962-09-19 1963-12-24 Du Pont Quenching process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335210A (en) * 1963-10-29 1967-08-08 Monsanto Co Filament yarn spinning apparatus and method
US4283364A (en) * 1977-05-04 1981-08-11 Akzona Incorporated Melt spinning of synthetic yarns
US4248581A (en) * 1979-09-05 1981-02-03 Allied Chemical Corporation Spinnerette
US4514350A (en) * 1982-09-23 1985-04-30 Celanese Corporation Method for melt spinning polyester filaments
US4605364A (en) * 1982-09-23 1986-08-12 Celanese Corporation Melt-spinning apparatus for polyester filaments

Also Published As

Publication number Publication date
GB1036036A (en) 1966-07-13
DE1435688A1 (de) 1970-01-08
BE650803A (de) 1965-01-20

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