EP0074445A1 - Spinning process and multifilament yarn - Google Patents

Spinning process and multifilament yarn Download PDF

Info

Publication number
EP0074445A1
EP0074445A1 EP81304213A EP81304213A EP0074445A1 EP 0074445 A1 EP0074445 A1 EP 0074445A1 EP 81304213 A EP81304213 A EP 81304213A EP 81304213 A EP81304213 A EP 81304213A EP 0074445 A1 EP0074445 A1 EP 0074445A1
Authority
EP
European Patent Office
Prior art keywords
filaments
sub
deniers
streams
split
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.)
Withdrawn
Application number
EP81304213A
Other languages
German (de)
French (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 EP81304213A priority Critical patent/EP0074445A1/en
Publication of EP0074445A1 publication Critical patent/EP0074445A1/en
Application status is Withdrawn legal-status Critical

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/28Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30Conjugate filaments; Spinnerette packs therefor
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/24Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor

Abstract

A multifilament yarn wherein the conjugate filaments may be split into sub-filaments having substantially different deniers.
A preferred spinneret (22) has horse-shoe shaped slots (20) with recessed web regions (24). Two dissimilar polymers are fed as a sheath-core conjugate stream with polymer interface (26).

Description

  • The invention relates to the art of spinning conjugate filaments yielding fabrics with improved hand.
  • It is known to produce conjugate filaments splittable into sub-filaments, as typified by Hayashi U.S. Patent 4,051,287, the disclosure of which is incorporated herein by reference. As disclosed therein, alternating segments of polyamide and polyester are spun in side-by-side temporarily adhering relationship to form a hollow filament splittable into polyamide and polyester sub-filaments of equal deniers.
  • According to the invention, a more natural hand in fabrics made from such filaments or sub-filaments is achieved when the sub-filaments have substantially different deniers.
  • According to a first aspect of the invention there is provided a spinning process, comprising generating a plurality of molten streams from a spinneret, each of 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 some sub-filaments split from a first of the filaments have substantially different deniers than other sub-filaments split from a second of the filaments.
  • According to another aspect of the invention, at least one of the filaments is splittable into a different number of sub-filaments than is another of the filaments.
  • According to another aspect of the invention, there is provided a multi-filament yarn comprising a plurality of filaments splittable into sub-filaments of at least first and second polymers, some sub-filaments split from a first of the filaments having substantially different deniers than other sub-filaments split from a second of the filaments.
  • According to another aspect of the invention, the first and the second of the filaments are splittable into different numbers of sub-filaments.
  • According to another aspect of the invention, some sub-filaments have deniers at least 50% larger than the other sub-filaments.
  • According to another aspect of the invention, some sub-filaments have deniers at least 100% larger than the other sub-filaments.
  • Other aspects will in part appear hereinafter and will in part be obvious from the following detailed description taken in connection with the accompanying drawing, wherein:
    • FIGURE 1 is a bottom plan view of a spinneret for making yarns according to the invention; and
    • FIGURE 2 is a fragmentary perspective view of an exemplary filament according to the invention.
  • As shown in FIGURE 1, 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 the 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. Most conveniently, 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. Since the relative combined filament deniers are thus controllable, and since the number of segments or sub-filaments for each combined filament is selected by spinneret design, a very wide range of deniers in the resulting sub-filaments split from the combined filaments is possible.
  • Exemplary dissimilar polymers are poly(ethylene terephthalate) and nylon 66. By "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.

Claims (8)

1. A spinning process, comprising:
a. generating a plurality of molten streams from a spinneret, each of said streams being formed from axially extending continuous segments of dissimilar polymers arranged alternately in side-by-side temporarily adhering relationship;
b. quenching said streams to form filaments; and
c. withdrawing said filaments from said streams, said streams being selected such that some sub-filaments split from a first of said filaments have substantially different deniers than other sub-filaments split from a second of said filaments.
2. The process defined in claim 1, wherein at least one of said filaments is splittable into a different number of sub-filaments than is another of said filaments.
3. The process defined in claim 1, wherein said some sub-filaments have deniers at least 50% larger than said other sub-filaments.
4. The process defined in claim 1, wherein said some sub-filaments have deniers at least 100% larger than said other sub-filaments.
5. A multi-filament yarn comprising a plurality of filaments splittable into sub-filaments of at least first and second polymers, some sub-filaments split from a first of said filaments having substantially different deniers than other sub-filaments split from a second of said filaments.
6. The yarn defined in claim 4, wherein said first and said second of said filaments are splittable into different numbers of sub-filaments.
7. The yarn defined in claim 5, wherein said some sub-filaments have deniers at least 50% larger than said other sub-filaments.
8. The yarn defined in claim 5, wherein said some sub-filaments have deniers at least 100% larger than said other sub-filaments.
EP81304213A 1981-09-15 1981-09-15 Spinning process and multifilament yarn Withdrawn EP0074445A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP81304213A EP0074445A1 (en) 1981-09-15 1981-09-15 Spinning process and multifilament yarn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81304213A EP0074445A1 (en) 1981-09-15 1981-09-15 Spinning process and multifilament yarn

Publications (1)

Publication Number Publication Date
EP0074445A1 true EP0074445A1 (en) 1983-03-23

Family

ID=8188395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81304213A Withdrawn EP0074445A1 (en) 1981-09-15 1981-09-15 Spinning process and multifilament yarn

Country Status (1)

Country Link
EP (1) EP0074445A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149195A1 (en) * 1998-10-06 2001-10-31 Fiber Innovation Technology, Inc. Splittable multicomponent elastomeric fibers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051287A (en) * 1974-12-12 1977-09-27 Teijin Limited Raised woven or knitted fabric and process for producing the same
EP0013186A1 (en) * 1979-01-02 1980-07-09 Monsanto Company Process for melt-spinning a splittable conjugate filament; self-texturing splittable conjugate filament; and method of splitting such a filament
GB2045153A (en) * 1979-03-27 1980-10-29 Monsanto Co Multisegmented filament spinning process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051287A (en) * 1974-12-12 1977-09-27 Teijin Limited Raised woven or knitted fabric and process for producing the same
EP0013186A1 (en) * 1979-01-02 1980-07-09 Monsanto Company Process for melt-spinning a splittable conjugate filament; self-texturing splittable conjugate filament; and method of splitting such a filament
GB2045153A (en) * 1979-03-27 1980-10-29 Monsanto Co Multisegmented filament spinning process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149195A1 (en) * 1998-10-06 2001-10-31 Fiber Innovation Technology, Inc. Splittable multicomponent elastomeric fibers
EP1149195A4 (en) * 1998-10-06 2005-02-09 Hills Inc Splittable multicomponent elastomeric fibers

Similar Documents

Publication Publication Date Title
US3470685A (en) Synthetic textile yarn
US3457342A (en) Method and apparatus for spinning heterofilaments
US3315021A (en) Process for the production of crimpable composite synthetic yarns
US3273771A (en) Filamentary material
US3700545A (en) Novel synthetic multi-segmented fibers
US3249669A (en) Process for making composite polyester filaments
EP0128013B1 (en) Spinneret assembly
EP0561612B1 (en) Spinneret device for conjugate melt-blow spinning
EP0618316B1 (en) A composite fiber and polyolefin microfibers made therefrom
CA1186862A (en) Spinneret for production of composite filaments
US3493459A (en) Complex multilobal textile filament
US3156607A (en) Lobed filament
CA2092871C (en) Apparatus and method for spinning multiple colored filaments from a single spinneret and a mixed filament spun thereby
US3469279A (en) Spinneret for heterofilaments
US3814561A (en) Spinnerets for producing multi-segment filaments
US3577308A (en) Manufacture of a multicomponent polymeric product
US5904982A (en) Hollow bicomponent filaments and methods of making same
US2945739A (en) Process of melt spinning
US3531368A (en) Synthetic filaments and the like
EP0646663A1 (en) A melt-blow spinneret device
EP0618317A1 (en) Composite fiber and microfibers made therefrom
EP0030566A1 (en) Pile fabric
US6274521B1 (en) Spun nonwoven fabric and apparatus for the manufacture thereof
AU655317B2 (en) Multicomponent trilobal fiber and process for preparation
GB1215402A (en) Improved conjugate filaments and method for producing same

Legal Events

Date Code Title Description
AK Designated contracting states:

Designated state(s): DE FR GB IT NL

18D Deemed to be withdrawn

Effective date: 19840425

RIN1 Inventor (correction)

Inventor name: YU, JING-PEIR