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WO1993010287A1 - Ameliorations relatives a des brins, des fils et des cables de polyester - Google Patents

Ameliorations relatives a des brins, des fils et des cables de polyester Download PDF

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Publication number
WO1993010287A1
WO1993010287A1 PCT/US1991/008379 US9108379W WO9310287A1 WO 1993010287 A1 WO1993010287 A1 WO 1993010287A1 US 9108379 W US9108379 W US 9108379W WO 9310287 A1 WO9310287 A1 WO 9310287A1
Authority
WO
WIPO (PCT)
Prior art keywords
yarn
denier
less
yarns
grams
Prior art date
Application number
PCT/US1991/008379
Other languages
English (en)
Inventor
John Paul Hendrix, Jr.
Benjamin Hughes Knox
Joe Forrest London, Jr.
James Bennett Noe
Original Assignee
E.I. Du Pont De Nemours And Company
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 E.I. Du Pont De Nemours And Company filed Critical E.I. Du Pont De Nemours And Company
Priority to PCT/US1991/008379 priority Critical patent/WO1993010287A1/fr
Publication of WO1993010287A1 publication Critical patent/WO1993010287A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch

Definitions

  • This invention concerns improvements in and relating to polyester (continuous) filaments, especially in the form of sub-denier filaments, and yarns thereof, and more especially to a capability to provide from the same feed stock such polyester continuous filament yarns of various differing deniers, as desired, and of other useful properties, including improved processes; and new polyester flat yarns, as well as filaments, generally, including tows, resulting from such processes, and downstream products from such filaments and yarns.
  • Preferred undrawn polyester feed yarns comprise spin-oriented polyester filaments of low shrinkage such as have been disclosed in Knox U.S. Pat. No. 4,156,071.
  • spin-oriented feed yarns of low shrinkage may be prepared at speeds higher than are used in the Knox patent, including speeds and conditions such as are
  • sub-denier herein we mean, for
  • the manufacture of sub-denier filaments commercially is more costly than for most prior commercial filaments of regular denier, as is well known.
  • Much of the prior commercial filament yarns of regular denier have been made by spinning continuously at high
  • the present invention provides a technique by which sub-denier polyester filaments may be made efficiently, without some of the cost disadvantages referred to above.
  • a yarn (A) of a given denier per filament less than about one, and a different yarn (B) of a different denier per filament less than about one, are both produced by drawing the same such feed yarn of spin-oriented polyester filaments, and wherein the denier per filament of yarn (B) differs by at least 10% from the denier per filament of yarn (A).
  • a polyester filament yarn that is suitable for weaving or knitting may be prepared by heat-treating such a feed yarn of spin-oriented polyester filaments as it is advanced under a controlled tension.
  • Polyester polymers used herein, may, if desired, be modified by incorporating ionic dye sites, such as ethylene-5-M-sulfo-isophthalate residues, where M is an alkali metal cation, for example in the range of about 1 to about 3 mole percent ethylene-5-sodium-sulfo-isophthalate
  • ionic dye sites such as ethylene-5-M-sulfo-isophthalate residues, where M is an alkali metal cation, for example in the range of about 1 to about 3 mole percent ethylene-5-sodium-sulfo-isophthalate
  • relative viscosity (LRV) about 13 to about 18 is particularly useful.
  • Representative copolyesters used herein to enhance dyeability with disperse dyes are described in part by Most U. S. Patent No.
  • the spin-oriented polyester filaments may be provided in the feed yarn as filaments that are already sub-denier.
  • the present invention provides an opportunity to reduce the denier of somewhat larger deniers into the sub-denier range.
  • a soft bulky textured yarn may be provided by air-jet texturing the resulting sub-denier filament yarns.
  • an opportunity is .provided for making sub-denier staple, e.g. by mechanical crimping of the filaments and converting to staple, e.g., by cutting or stretch-breaking.
  • Tables XVI to XIX use feed yarns as disclosed in the Examples of the parent application, in Tables I-XV and the accompanying-disclosure of drawing of feed yarns. This is why the Tables herein are numbered consecutively, XVI-XIX, following Tables I-XV of the parent application, which are incorporated herein by reference.
  • the warp drawn yarns of XVI-2,3 and -6,7 were uniformly partially cold drawn to residual elongations greater than 40% and were capable of being uniformly dyed without along-end dye variations (such as would result from nonuniform thick-thin drawing, characteristic of partially drawn conventional POY). Even at a residual elongation of about 30%, the boil-off and dry-heat shrinkages were less than 6% with a
  • DHS-BOS differential shrinkage
  • Co-cold drawing of undrawn flat textile yarns wherein one yarn is heat-set to shrinkages less than about 3% and a second yarn is not heat-set, provides a simplified route to a mix-shrinkage warp sheet.
  • This co-cold drawing can also be
  • the high-shrinkage components of the mix-shrinkage warp sheet and of the single-end mix-shrinkage yarns of the invention differ from those made by drawing a conventional POY, in that the high shrinkage components of the invention have a differential shrinkage (DHS-BOS) typically less than about 2%; thus providing a very stable level of mix-shrinkage over a large end-use processing temperature range.
  • DHS-BOS differential shrinkage
  • fine denier drawn filament yarns may be prepared according to the invention from undrawn feed yarns that have been treated with caustic in the spin finish (as taught by Grindstaff and Reese in copending allowed Patent Application Serial No. 07/420,459, filed October 12, 1989) to enhance their hydrophilicity and provide improved moisture-transport and comfort.
  • filaments of differing polymer modifications such as homopolymer dyeable with disperse dyes and ionic copolymers dyeable with cationic dyes.
  • Undrawn feed yarns capable of being partially drawn and of being cold drawn to provide uniform drawn filament yarns were prepared by spinning 15.3 LRV copolymer at about 285°C and quenched using laminar cross-flow quench apparatus with a 5.6 cm delay, essentially as described in U. S. Patent No. 4,529,638, and
  • the undrawn yarns can be drawn up to 1.77X and 1.68X, respectively, to provide drawn filament yarns of at least about 20%
  • the elongation and said drawn filament yarns may be air-jet textured yarns.
  • the undrawn yarns may also be drawn with or without heat treatment and combined with homopolymer drawn filament yarns to provide mixed dyeability yarns.
  • the relative viscosity (LRV) of the polyester is as defined according to Broaddus U. S. Patent No.4,712,998.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)

Abstract

L'étirage, en particulier l'étirage à froid, ou l'étirage à chaud, ou autres traitements thermiques de brins de polyester cristallins orientés au filage, en particulier des fils d'alimentation en polyester, qui ont été produits par filage à des vitesses de 4 km/min, par exemple, et qui présentant un rétrécissement faible et aucun rapport d'étirage naturel dans le sens classique, constitue une technique utile pour obtenir des brins étirés uniformes d'un denier requis. Cette technique permet ainsi d'obtenir une flexibilité améliorée dans la production de brins et de fils de différents deniers ne dépassant pas 1 par brin.
PCT/US1991/008379 1991-11-18 1991-11-18 Ameliorations relatives a des brins, des fils et des cables de polyester WO1993010287A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1991/008379 WO1993010287A1 (fr) 1991-11-18 1991-11-18 Ameliorations relatives a des brins, des fils et des cables de polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1991/008379 WO1993010287A1 (fr) 1991-11-18 1991-11-18 Ameliorations relatives a des brins, des fils et des cables de polyester

Publications (1)

Publication Number Publication Date
WO1993010287A1 true WO1993010287A1 (fr) 1993-05-27

Family

ID=22225954

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/008379 WO1993010287A1 (fr) 1991-11-18 1991-11-18 Ameliorations relatives a des brins, des fils et des cables de polyester

Country Status (1)

Country Link
WO (1) WO1993010287A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156071A (en) * 1977-09-12 1979-05-22 E. I. Du Pont De Nemours And Company Poly(ethylene terephthalate) flat yarns and tows
US4933427A (en) * 1989-03-03 1990-06-12 E. I. Du Pont De Nemours And Company New heather yarns having pleasing aesthetics
US4970038A (en) * 1988-11-29 1990-11-13 Basf Corporation Process of preparing polyester yarn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156071A (en) * 1977-09-12 1979-05-22 E. I. Du Pont De Nemours And Company Poly(ethylene terephthalate) flat yarns and tows
US4970038A (en) * 1988-11-29 1990-11-13 Basf Corporation Process of preparing polyester yarn
US4933427A (en) * 1989-03-03 1990-06-12 E. I. Du Pont De Nemours And Company New heather yarns having pleasing aesthetics

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