US3313000A - Spinneret plate - Google Patents

Spinneret plate Download PDF

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Publication number
US3313000A
US3313000A US471527A US47152765A US3313000A US 3313000 A US3313000 A US 3313000A US 471527 A US471527 A US 471527A US 47152765 A US47152765 A US 47152765A US 3313000 A US3313000 A US 3313000A
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US
United States
Prior art keywords
plate
webs
capillary
spinneret
spinneret plate
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
US471527A
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English (en)
Inventor
Hays Richard Young
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US471527A priority Critical patent/US3313000A/en
Priority to GB30987/66A priority patent/GB1088020A/en
Priority to NL6609688A priority patent/NL6609688A/xx
Application granted granted Critical
Publication of US3313000A publication Critical patent/US3313000A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • This invention relates generally to the melt spinning of hollow filaments from synthetic polymers and, more particularly, to a spinneret nozzle configuration which facilitates the production of improved hollow filaments.
  • Synthetic filaments are spun by forcing a molten material such as nylon, under pressure, through a plurality of extrusion orifices formed in a spinneret or spinneret plate from which the material issues in the form of continuous filaments which solidify on cooling.
  • the orifices are generally of circular form and the resulting filaments are of solid circular form.
  • filaments of other configurations It is known, for example, that odd-shaped cross sections impart desirable fabric aesthetics. Hollow filaments are also being used for improved textile properties.
  • hollow filaments were spun by forcing melts through a spinneret nozzle which contained a small tube through which gas was supplied to the filament center. Such arrangements are relatively complicated. In recent years, it has been found possible to spin through segmented orifices and have the sections of polymer coalesce in the form of a hollow filament below the spinneret. Although entirely satisfactory for use in textile applications, such filaments perform inadequately in other applications, for example, when used to meter fluids in testing devices or as capillary flow tubes in permeation separation cells. These and analogous usages require hollow filaments of minimum wall thickness and maximum wall strength, high resistance to rupture and an absence of localized weak spots.
  • the general objective of this invention is to provide for production of hollow filaments suitable for use as capillary flow tubes.
  • a more particular objective is the provision of a spinneret nozzle configuration which facilitates production of hollow filaments having very small diameters and a high degree of uniformity.
  • a spinneret plate having specially configured nozzles.
  • Each nozzle starts in an entrance hole and has a discharge capillary opening into the other face of the plate.
  • the capillary is defined by a substantially symmetrical pattern of arcuate slots interrupted by webs. Each slot progressively increases in width from a minimum at its mid-point to maxima at the adjacent webs. Except for one which extends to the discharge surface of the plate, all webs are recessed.
  • FIGURE 1 is a fragmentary, bottom view of a spinneret plate showing the exit orifice of one spinning nozzle;
  • FIG. 2 is a sectional view taken on irregular line IIII in FIG. 1, after returning the plate to its normal or upright position.
  • Capillary 14 is defined by a substantially symmetrical pattern of arcuate, end-to-end slots 16, 17, 18 which are interrupted by webs 20, 21, 22 but otherwise surround a solid center portion 24. Thus, center portion 24 remains integrally attached to plate 10 by the webs.
  • each of the arcuate slots 16, 17, 18 is bowed outwardly from the pattern center, i.e., both of the above radii are shorter than the distance to the pattern center.
  • hollow filaments of increased wall strength are spun by supplying molten polymer to each entrance hole 12 under sufiicient pressure to extrude it out of the capillary 14. Due to the recessed webs 20, 21, polymer will be kept apart until it nears the exit of capillary 14 and flows back together, forming a longitudinal seam. The surface web 22 prevents the molten polymer tfrom flowing back together until after it leaves the bottom face of plate 10. However, shortly after leaving the spinneret, edges of the extrudates are coalesced together. Entry of air before this final coalescence prevents collapse of the resulting hollow filament. Since the orifices presented by slots 16, 17, 18 are wider adjacent the web portions, more polymer is extruded and the wall thickness is greater at the seams.
  • a spinneret plate provided with at least one nozzle having a discharge capillary opening into one face of the plate, said capillary being defined by a substantially symmetrical pattern of arcuate, end-to-end slots interrupted by webs, each slot progressively increasing in width from a minimum at its mid-point to a maximum adjacent its ends.
  • each slot is bowed with its mid-point spaced farther from the pattern center than its ends.
  • a spinneret plate provided with at least one nozzle having a discharge capillary opening into one surface of the plate, said capillary being defined by a complex pattern of arcuate slots separated by webs, one of said webs extending to and forming a part of said surface, said surface being recessed at the location of the remaining webs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US471527A 1965-07-13 1965-07-13 Spinneret plate Expired - Lifetime US3313000A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US471527A US3313000A (en) 1965-07-13 1965-07-13 Spinneret plate
GB30987/66A GB1088020A (en) 1965-07-13 1966-07-11 Improvements in or relating to spinneret plates
NL6609688A NL6609688A (fr) 1965-07-13 1966-07-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US471527A US3313000A (en) 1965-07-13 1965-07-13 Spinneret plate

Publications (1)

Publication Number Publication Date
US3313000A true US3313000A (en) 1967-04-11

Family

ID=23871946

Family Applications (1)

Application Number Title Priority Date Filing Date
US471527A Expired - Lifetime US3313000A (en) 1965-07-13 1965-07-13 Spinneret plate

Country Status (3)

Country Link
US (1) US3313000A (fr)
GB (1) GB1088020A (fr)
NL (1) NL6609688A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357048A (en) * 1966-05-27 1967-12-12 Du Pont Spinnerette
US3915606A (en) * 1972-11-10 1975-10-28 Possis Corp Extrusion nozzle for packaging machines
US3924988A (en) * 1972-05-24 1975-12-09 Du Pont Hollow filament spinneret
US4279053A (en) * 1979-09-24 1981-07-21 E. I. Du Pont De Nemours And Company Tri- or tetra-locular paint brush bristles
US5032456A (en) * 1987-09-11 1991-07-16 Newell Operating Company Microcellular synthetic paintbrush bristles
US5786087A (en) * 1995-02-22 1998-07-28 Specialty Filaments, Inc. Honeycomb brush bristles and brush made therefrom
US20030118763A1 (en) * 2001-05-08 2003-06-26 Travelute Frederick L. Method and apparatus for high denier hollow spiral fiber
US20090011182A1 (en) * 2003-12-12 2009-01-08 Cambridge University Technical Services Limited Extrudate Having Capillary Channels
CN105369372A (zh) * 2015-12-10 2016-03-02 河南省龙都生物科技有限公司 采用阶梯毛细喷丝孔结构的异形纤维喷丝板

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095258A (en) * 1962-06-22 1963-06-25 Du Pont Melt spinning process for producing hollow-core filament
US3174364A (en) * 1960-09-26 1965-03-23 Monsanto Co Process for the manufacture of spinnerets for melt spinning

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174364A (en) * 1960-09-26 1965-03-23 Monsanto Co Process for the manufacture of spinnerets for melt spinning
US3095258A (en) * 1962-06-22 1963-06-25 Du Pont Melt spinning process for producing hollow-core filament

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3357048A (en) * 1966-05-27 1967-12-12 Du Pont Spinnerette
US3924988A (en) * 1972-05-24 1975-12-09 Du Pont Hollow filament spinneret
US3915606A (en) * 1972-11-10 1975-10-28 Possis Corp Extrusion nozzle for packaging machines
US4279053A (en) * 1979-09-24 1981-07-21 E. I. Du Pont De Nemours And Company Tri- or tetra-locular paint brush bristles
US5032456A (en) * 1987-09-11 1991-07-16 Newell Operating Company Microcellular synthetic paintbrush bristles
US5786087A (en) * 1995-02-22 1998-07-28 Specialty Filaments, Inc. Honeycomb brush bristles and brush made therefrom
US6797209B2 (en) 2001-05-08 2004-09-28 Wellman, Inc. Method and apparatus for high denier hollow spiral fiber
US6746230B2 (en) 2001-05-08 2004-06-08 Wellman, Inc. Apparatus for high denier hollow spiral fiber
US20030118763A1 (en) * 2001-05-08 2003-06-26 Travelute Frederick L. Method and apparatus for high denier hollow spiral fiber
US20050037196A1 (en) * 2001-05-08 2005-02-17 Travelute Frederick L. Method and apparatus for high denier hollow spiral fiber
US20060014015A1 (en) * 2001-05-08 2006-01-19 Travelute Frederick L Method and apparatus for high denier hollow spiral fiber
US7001664B2 (en) 2001-05-08 2006-02-21 Wellman, Inc. Method and apparatus for high denier hollow spiral fiber
US7229688B2 (en) 2001-05-08 2007-06-12 Wellman, Inc. Method and apparatus for high denier hollow spiral fiber
US20070231519A1 (en) * 2001-05-08 2007-10-04 Wellman, Inc. Method and Apparatus for High Denier Hollow Spiral Fiber
US20090011182A1 (en) * 2003-12-12 2009-01-08 Cambridge University Technical Services Limited Extrudate Having Capillary Channels
US8641946B2 (en) 2003-12-12 2014-02-04 Cambridge Enterprise Limited Extrudate having capillary channels
CN105369372A (zh) * 2015-12-10 2016-03-02 河南省龙都生物科技有限公司 采用阶梯毛细喷丝孔结构的异形纤维喷丝板

Also Published As

Publication number Publication date
NL6609688A (fr) 1967-01-16
GB1088020A (en) 1967-10-18

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