EP0074446B1 - Fil multifilament et procédé de filage - Google Patents

Fil multifilament et procédé de filage Download PDF

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Publication number
EP0074446B1
EP0074446B1 EP19810304214 EP81304214A EP0074446B1 EP 0074446 B1 EP0074446 B1 EP 0074446B1 EP 19810304214 EP19810304214 EP 19810304214 EP 81304214 A EP81304214 A EP 81304214A EP 0074446 B1 EP0074446 B1 EP 0074446B1
Authority
EP
European Patent Office
Prior art keywords
filaments
streams
sub
splittable
spinning process
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
EP19810304214
Other languages
German (de)
English (en)
Other versions
EP0074446A1 (fr
Inventor
Jing-Peir Yu
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.)
Monsanto Co
Original Assignee
Monsanto 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 Monsanto Co filed Critical Monsanto Co
Priority to DE8181304214T priority Critical patent/DE3170615D1/de
Priority to EP19810304214 priority patent/EP0074446B1/fr
Publication of EP0074446A1 publication Critical patent/EP0074446A1/fr
Application granted granted Critical
Publication of EP0074446B1 publication Critical patent/EP0074446B1/fr
Expired 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
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; 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
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor

Definitions

  • the invention relates to the art of spinning conjugate filaments splittable into sub-filaments having different deniers. More particularly, it relates to control of the properties of the sub-filaments.
  • a more natural hand in fabrics made from melt spun yarns is attained when the yarns are composed of filaments having different deniers.
  • a simple known method of making yarns of mixed dpf (denier per filament) is to spin a polymer through a spinneret having capillaries of various lengths and/or cross-sectional areas.
  • To spin a yarn from such a spinneret presents processing difficulties because of the effect of transverse quenching air on the resulting molten streams having different surface areas presented to the quenching air. Large molten streams will be blown further away from the quench air source than small ones.
  • the quenching rates and the stresses on the large and small streams are different, causing morphological differences in the resulting filaments. Such differences cause variable dyeability and other problems.
  • a spinning process comprising generating a plurality of molten streams from a spinneret, the streams being formed from axially extending continuous segments of dissimilar polymers arranged alternately in side-by-side temporarily adhering relationship; quenching the streams to form filaments; and withdrawing the filaments from the streams, the streams being selected such that first and second of the filaments have substantially the same denier and are splittable into different numbers of sub-filaments derived from said segments.
  • the streams from which the first and the second of the filaments are quenched have substantially the same jet stretch.
  • a multi-filament yarn comprising a plurality of filaments of equal deniers splittable into sub-filaments of at least first and second polymers, at least one of the sub-filaments of the first polymer split from a first of the filaments having a different denier than another of the sub-filaments of the first polymer split from a second of the filaments.
  • the first and the second of the filaments are splittable into different numbers of sub-filaments.
  • the preferred spinneret construction illustrated includes several groups of generally arched or horseshoe-shaped slots 20 in spinneret blank 22, those slots 20 in each group being arranged symmetrically about a central point for that group with the open end of the horseshoe shapes facing inwardly.
  • the several slots 20 in each group constitute a combined orifice for spinning a single filament. Slots 20 extend entirely through blank 22 except for recessed web 24 at the apex of each slot 20, the webs 24 and the lands between adjacent ends of slots 20 providing support to retain the material in the center of the combined orifice.
  • the two dissimilar polymers are fed to combined orifices as sheath-core supply streams, with dotted circles 26 representing the interfaces between the two polymers. Adjacent ends of adjacent slots 20 are sufficiently close that the streams issuing therefrom unite just below the spinneret.
  • the molten spun streams are thus hollow structures composed of alternating axially extending segments of the two polymers. Surface tension and other effects tend to make the molten streams approach hollow circular cross-sections prior to solidification, as shown in Figure 2, which illustrates a filament formed by a combined orifice composed of eight slots 20. If the polymers differ in melt viscosity, it is ordinarily preferable to provide the polymer having the lower viscosity as the core of the stream approaching each combined orifice.
  • the various slot dimensions in the directions parallel to and transverse to the direction of polymer flow are selected to control the relative deniers of the combined filaments spun from the various combined orifices.
  • the various slots may be identical in their transverse dimensions, with their lengths parallel to the direction of polymer flow selected to control the relative combined filament deniers.
  • the three slots 20 for the combined orifice in the upper right corner of Figure 1 may be made shorter in the direction parallel to polymer flow than the six slots 20 for the combined orifice in the lower left corner of Figure 1, so that the combined filaments spun therefrom have substantially the same denier.
  • the molten streams will thus have substantially the same quenching rate and be subjected to substantially the same stresses during spinning, so that the resulting sub-filaments of the same polymer type will dye substantially the same although they may be of substantially different deniers.
  • dissimilar polymers are poly-(ethylene terephthalate) and nylon 66.
  • dissimilar is meant that the polymeric components in the solidified filaments can be readily separated from one another into sub-filaments.
  • the hand of fabrics made from yarns according to the invention can be varied widely by selection of substantially different deniers for the sub-filaments. Marked improvement in hand occurs when some sub-filaments have deniers at least 50% larger than others of the sub-filaments, with better results when the difference is at least 100%.
  • Yarns according to the invention can be produced by spinning followed by drawing, either in a coupled process or as separate operations, or can be produced by spinning at speeds sufficiently high as to eliminate the need for a drawing operation.

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

Claims (4)

1. Procédé de filature, comprenant:
a. la production d'une pluralité de courants à l'état fondu à partir d'une filière, ces courants étant formés à partir de segments continus, s'étendant axialement, de polymères dissemblables disposés alternativement en relation d'adhérence temporaire côte à côte,
b. le refroidissement des courants pour former des filaments; et
c. l'extraction des filaments hors des courants, les courants étant choisis de façon que les premier et second des filaments aient sensiblement le même denier et puissent être fractionnés en nombres différents de sous-filaments obtenus à partir desdits segments.
2. Procédé selon la revendication 1, où les courants à partir desquels les premier et second des filaments sont refroidis ont sensiblement la même extension sous tuyère.
3. Filé multi-filament comprenant une pluralité de filaments de deniers égaux pouvant être fractionnés en sous-filaments d'au moins un premier et un second polymère, au moins l'un des sous-filaments du premier polymère fractionné à partir d'un premier des filaments ayant un denier différent d'un autre des sous-filaments du premier polymère fractionné à partir d'un second des filaments.
4. Filé selon la revendication 3, où le premier et le second des filaments peuvent être fractionnés en nombres différents de sous-filaments.
EP19810304214 1981-09-15 1981-09-15 Fil multifilament et procédé de filage Expired EP0074446B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8181304214T DE3170615D1 (en) 1981-09-15 1981-09-15 Multifilament yarn and spinning process therefor
EP19810304214 EP0074446B1 (fr) 1981-09-15 1981-09-15 Fil multifilament et procédé de filage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19810304214 EP0074446B1 (fr) 1981-09-15 1981-09-15 Fil multifilament et procédé de filage

Publications (2)

Publication Number Publication Date
EP0074446A1 EP0074446A1 (fr) 1983-03-23
EP0074446B1 true EP0074446B1 (fr) 1985-05-22

Family

ID=8188396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810304214 Expired EP0074446B1 (fr) 1981-09-15 1981-09-15 Fil multifilament et procédé de filage

Country Status (2)

Country Link
EP (1) EP0074446B1 (fr)
DE (1) DE3170615D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5783503A (en) * 1996-07-22 1998-07-21 Fiberweb North America, Inc. Meltspun multicomponent thermoplastic continuous filaments, products made therefrom, and methods therefor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS581221B2 (ja) * 1974-12-12 1983-01-10 帝人株式会社 シカガワヨウヘンシヨクブツノ セイゾウホウホウ
JPS55128016A (en) * 1979-01-02 1980-10-03 Monsanto Co Conjugated yarn
US4246219A (en) * 1979-03-27 1981-01-20 Monsanto Company Multisegmented filament spinning process

Also Published As

Publication number Publication date
EP0074446A1 (fr) 1983-03-23
DE3170615D1 (en) 1985-06-27

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