US3499958A - Process for obtaining x-shaped filaments - Google Patents

Process for obtaining x-shaped filaments Download PDF

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Publication number
US3499958A
US3499958A US590711A US3499958DA US3499958A US 3499958 A US3499958 A US 3499958A US 590711 A US590711 A US 590711A US 3499958D A US3499958D A US 3499958DA US 3499958 A US3499958 A US 3499958A
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United States
Prior art keywords
spinneret
filaments
holes
obtaining
radius
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Expired - Lifetime
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US590711A
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English (en)
Inventor
Rene Stuchlik
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Rhodiaceta SA
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Rhodiaceta SA
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Publication date
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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
    • 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
    • D01D5/04—Dry spinning methods

Definitions

  • the present invention provides a process for obtaining yarns in which most 'or practically all the constituent filaments have a transverse cross-section in the shape of the letter X, which comprises dry spinning a solution of a filament-forming material in a volatile solvent through a spinneret perforated with square holes, such that the drying conditions at two adjacent sides of each square hole are substantially identical.
  • a spinneret as described below is used.
  • the invention consists also in a spinneret perforated with square holes which may be used for this process, in which the said square holes are so arranged that each of them has one diagonal making an angle of less than with the radius of the spinneret which passes through the centre of the hole.
  • filament-forming materials are meant synthetic or artificial polymeric materials such as cellulosic esters, especially cellulose diacetate (secondary cellulose acetate) or triacetate, and synthetic polymers.
  • volatile solvent is to be understood as any liquid capable of dissolving the material to be spun, but having a relatively low boiling point, preferably not exceeding 80 C.
  • the filament-forming material such as acetone for cellulose diacetate, a mixture of methylene chloride and a low aliphatic alcohol, especially methanol or ethanol, for cellulose triacetate, a mixture of carbon disulphide and acetone for polymers based on vinyl chloride, etc.
  • Spiunerets of any shape and size, and made of any 3,499,958 Patented Mar. 10, 1970 appropriate material may be used, depending on the material which is to be spun.
  • the spinneret may for example be in the form of a plate or a dome and may be perforated with one or more rings of holes.
  • the spinneret may, equally, be perforated with holes arranged along one or more lines, for example along the sides of a polygon concentric with the spinneret. It will generally be advantageous to use a spinneret in which the perforations are not too close, so that the drying of each filament is not interfered with by the presence of the adjacent filaments.
  • the same conditions of temperature of the spinning solution, temperature of the walls of the spinning chamber, temperature and rate of flow of co-operative medium, and of stretching on spinning, may be used as are normally employed for dry spinning the same filamentforming material.
  • the process of the invention makes it possible to obtain yarns in which at least of the constituent filaments have a cross-section in the shape of an X.
  • Such a cross-section gives the filaments special properties, principally very high resilience, this characteristic being particularly appreciated and sought after in carpet piles.
  • FIGURE 1 is a view of the external face of a spinneret
  • FIGURE 2 is a view of a portion of the spinneret face of FIGURE 1 on a larger scale
  • FIGURE 3 is a view of the external face of another spinneret
  • FIGURE 4 is a view of the external face of a third spinneret
  • FIGURE 5 shows the transverse cross-section of a filament obtained by the process of the invention.
  • FIGURE 1 there is shown a spinneret comprising a base 1 and holes 2; arranged in one ring.
  • FIGURE 2 shows that the holes 2 are arranged in such a way that each of the diagonals 3, 3' and 3" coincides with a radius 4, 4 and 4" of the spinneret.
  • the holes 2 are arranged in 3 rings each having 4 holes, one of the diagonals of each hole coinciding with a radius of the spinneret.
  • the holes 2 and 2 are arranged along the sides of a polygon concentric with the spinneret face.
  • the holes 2 are so oriented that one of their diagonals coincides exactly with a radius of the spinneret, and the holes 2' in such a way that one of their diagonals, makes an angle of 7 with a radius of the spinneret.
  • FIGURE 5 shows the shape of filaments 5 which all have a X-shaped cross-section.
  • This solution is warmed to 55 C. and extruded through a spinneret in a vertical dry spinning chamber of internal diameter 60 mm. and height 3.50 m., the walls of which are heated to C.
  • the spinneret has 5 square holes of side length 0.1 mm. arranged regularly in a ring of radius 30 mm., a diagonal of each square coinciding with a radius of the spinneret.
  • Air at the ambient temperature circulates through the chamber in a downward direction, i.e. in the same direction as the filaments at a rate of 4.5 m. /h.
  • a 120 decitex (110 denier) yarn consisting of 5 filaments each of 24 decitex (22 denier) is obtained at a speed of 150 m./ minute; the filaments have an X crosssection such as is shown in FIGURE 5.
  • EXAMPLE 2 A solution identical to that of Example 1 is heated to 60 C. and extruded through a spinneret having square holes of side length 0.08 mm. oriented as in Example 1 and arranged in a ring of radius 30 mm., in a dry spinning chamber identical with that used in Example 1, but with the walls heated to 115 C. and with the air passing down the chamber at a rate of 8 in. per hour.
  • Example 4 arranged as in FIGURE 1, in a dry spinning chamber identical to that of Example 1 but with the walls heated to C.
  • Air is circulated down the chamber at a rate of 6 m5 per hour.
  • a 110 decitex denier) yarn consisting of 24 filaments each of 4.9 decitex (4.4 denier) and each having an X cross-section is obtained at a speed of 250 m./ minute.
  • a process for obtaining yarns in which at least most of the elementary filaments have an X cross-section which comprises dry Spinning a solution of a cellulose acetate in a volatile solvent selected from the group consisting of solutions of secondary cellulose acetate in acetone and solutions of cellulose triacetate in mixtures of methylene chloride and a lower aliphatic alcohol through a spinneret perforated with square holes, in which each hole has one diagonal making an angle less than 10 with the radius of the spinneret face passing through the center of the hole, as a result of which the drying conditions are substantially identical on two adjacent sides of each square hole.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Artificial Filaments (AREA)
US590711A 1965-11-08 1966-10-31 Process for obtaining x-shaped filaments Expired - Lifetime US3499958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR37664A FR1473904A (fr) 1965-11-08 1965-11-08 Procédé d'obtention de fils à coupe spéciale et filière utilisable à cet effet

Publications (1)

Publication Number Publication Date
US3499958A true US3499958A (en) 1970-03-10

Family

ID=8592072

Family Applications (1)

Application Number Title Priority Date Filing Date
US590711A Expired - Lifetime US3499958A (en) 1965-11-08 1966-10-31 Process for obtaining x-shaped filaments

Country Status (8)

Country Link
US (1) US3499958A (enrdf_load_stackoverflow)
BE (1) BE689370A (enrdf_load_stackoverflow)
CH (1) CH461016A (enrdf_load_stackoverflow)
DE (1) DE1660544A1 (enrdf_load_stackoverflow)
FR (1) FR1473904A (enrdf_load_stackoverflow)
GB (1) GB1144376A (enrdf_load_stackoverflow)
LU (1) LU52308A1 (enrdf_load_stackoverflow)
NL (1) NL6615357A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640670A (en) * 1968-06-20 1972-02-08 Fiber Industries Inc Spinnerette for extruding t-shaped filaments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60134012A (ja) * 1983-12-21 1985-07-17 Mitsubishi Rayon Co Ltd Ｙ型断面アセテ−ト繊維紡糸用口金

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1902953A (en) * 1931-03-11 1933-03-28 Revere Rubber Co Method and apparatus for the manufacture of filamentary material
US2880106A (en) * 1956-01-11 1959-03-31 British Celanese Manufacture of textile and other materials having a basis of cellulose triacetate
CA695217A (en) * 1964-09-29 Celanese Corporation Of America Manufacture of artificial filaments with blunted leg portions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA695217A (en) * 1964-09-29 Celanese Corporation Of America Manufacture of artificial filaments with blunted leg portions
US1902953A (en) * 1931-03-11 1933-03-28 Revere Rubber Co Method and apparatus for the manufacture of filamentary material
US2880106A (en) * 1956-01-11 1959-03-31 British Celanese Manufacture of textile and other materials having a basis of cellulose triacetate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640670A (en) * 1968-06-20 1972-02-08 Fiber Industries Inc Spinnerette for extruding t-shaped filaments

Also Published As

Publication number Publication date
GB1144376A (en) 1969-03-05
NL6615357A (enrdf_load_stackoverflow) 1967-05-09
DE1660544A1 (de) 1971-04-08
CH461016A (fr) 1968-08-15
FR1473904A (fr) 1967-03-24
LU52308A1 (enrdf_load_stackoverflow) 1967-01-04
BE689370A (enrdf_load_stackoverflow) 1967-05-08

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