US3914930A - Method of manufacturing variable knop yarn - Google Patents

Method of manufacturing variable knop yarn Download PDF

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Publication number
US3914930A
US3914930A US386879A US38687973A US3914930A US 3914930 A US3914930 A US 3914930A US 386879 A US386879 A US 386879A US 38687973 A US38687973 A US 38687973A US 3914930 A US3914930 A US 3914930A
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United States
Prior art keywords
yarn
component
knop
zone
filamentary
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Expired - Lifetime
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US386879A
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English (en)
Inventor
Michael Anthony Jenkins
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
    • D02G1/024—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting with provision for imparting irregular effects to the yarn

Definitions

  • FIG. 1 is a diagrammatic representation of FIG.
  • variable knop yarns we mean a .yarn which Contains prominent bunches of one or more of its components arranged at irregular intervals along its length.
  • a. process for making a variable, k'nop yarn wherein a first filamentary component is passed from a feed means through, in sequence, a heating zone, a zone in which false twist is applied to the yarn and a knop-forming zone to a withdrawing means and a second filamentary component is introduced in a region between said feed means and said zone in which false twist is applied, preferably between said feed means and said heating zone, in such a manner that it becomes wrapped around said first filamentary component, said second filamentary component being formed into knops in the knop-forming zone by being rubbed back along said first component.
  • the invention also includes variable knop-type yarns made according-to the process of the invention.
  • a feed means we include a positive feed system such as a nip roll or feed roll assembly or afree feed system suchas a tensioning device.
  • the second filamentary component may be introduced by positive feed or free feed.
  • the first filamentary component may comprise a synthetic monofilament, a continuous multifilament yarn, a bonded yarn, or a combination of any one with discontinuous fibres.
  • the second filamentary component may comprise a continuous filament(s) or discontinuous fibres or a combination of both.
  • the false twist may be applied by a twist pin or a twist element of-the friction type by which false twist is inserted by the direct action of rotating annular friction means on the yarn.
  • the knops areformed in the knopsforming zone by a means which may comprise ;a friction device such as, for example, a ceramic guide.
  • Variations in the size of the knops and their frequency along the yarn may be achieved by, altering the feed rate of the second filamentary component, altering the frictional properties of the knop-forming means or altering the decitex of the second filamentary com ponent.
  • altering the feed rate of the second component altering the frictional properties of the knop-forming means or altering the decitex of the second filamentary com ponent.
  • decreasing the feed rate of the second component for a given system increasing the frictional properties of the knop-forming means or increasing the decitex of the second component tends to produce larger knops.
  • the region in which the second filamentary compo nent wraps around the first filamentary component may be located by positioning a thread guide or guides downstream of the feed means such that wrapping takes place between the feed means and the thread guide or between the thread guides. guide
  • FIG. 1 is a diagrammatic representation of one embodiment of the process of the invention.
  • FIG. 2 is a perspective view of the knop-forming guide 25 in FIG. 1.
  • a first multifilament yarn l is withdrawn from supply package 3 via a tensioner 4 and a thread guide 5 by a nip roll assembly 7.
  • the nip roll assembly 7 comprises two continuous rolls 9 and 11 between which the yarn l is passed. From the nip roll assembly 7 the yarn 1 passes via a thread guide 13 to a false twisting stage comprising a heater place 15 and a false twist pin 17. Twist inserted by false twist pin 17 runs back along the yarn to nip roll assembly 7.
  • a second multifilament yarn 19 is withdrawn at a low tension from supply package 21 via athread guide 23 and wraps in a unidirectional helix around yarn l in the region between the nip roll assembly 7 and the thread guide 13.
  • the point at which the yarn l9 wraps around the yarn 1 oscillates to and fro in a zone within this region.
  • thecore yarn passes over a friction guide 25, through a nip roll assembly 27, comprising two contiguous rolls 29 and 31, and is finally wound up on package 33.
  • a friction guide 25 the sheath is rubbed back into knops 35 along the core until the frictional force between the guide 25 and the knop is below the force needed to rub back the sheath; the knop 35 is then released from the friction guide 25: and travels with the core to the wind-up.
  • EXAMPLE 1 A variable knop yarn-was produced by" a process as illustrated in. FIG. 1.
  • the first filamentarycomponent comprised a drawn 167 decitex 30 filament poly(ethylene terephthalate) yarn.
  • the second filamentary component comprised a drawn 22 decitex 7 filament poly(- hexamethylene adipamide) .yarn.
  • the processing conditions were as follows:
  • Twist applied by spindle 2400 turns per metre Length of hotplate 28 inches Temperature of hotplate 210C Overfeed in false twist zone 0% Overfeed to wind-up 15% Nature of knop-fanning means Sintox ceramic guide EXAMPLE 2'
  • a variable knop yarn was produced by a process similar to that illustrated in FIG. 1 except that a yarn relaxation zone was inserted between the nip roll assembly 27 and the wind-up package 33.
  • the relaxation zone 3 comprised a heated tube followed by a nip roll assembly.
  • the first component comprised a drawn 167 decitex 30 filament poly(ethylene terephthalate) yarn and the sescond component comprised a 22 decitex 7 filament poly(hexamethylene adipamide) yarn.
  • the processing conditions were as follows:
  • Twist applied by spindle Z600 turns per metre Length of hotplate 28 inches Temperature of hotplate 200C Temperature of heated tube 180C Overfeed in false twist zone Overfeed in relaxation zone 15% Overfeed to wind-up 3% Nature of knop-forming means Sintox ceramic guide The knop yarn so produced contained to 16 knops per 10 yards of yarn, the knops being of length 7 8 to A inch and of diameter Vs to inch.
  • a knop count was carried out by counting the number of knops in a 5 X 5 cm square of the fabric.
  • the size of the knops was estimated visually on a graded scale in 4 which 1 is equivalent to small knops and 4 is equivalent to large knops.
  • a process for making a variable knop yarn wherein a first filamentary component is passed from a feed means through, in sequence, a heating zone, a zone in which false twist is applied to the yarn and a knopforming zone to a withdrawing means and a second filamentary component is introduced in a region between said feed means and said zone in which false twist is applied in such a manner that it becomes wrapped around said first filamentary component, said second filamentary component being formed into knops in the knopforming zone by being rubbed back along said first component.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US386879A 1972-08-15 1973-08-09 Method of manufacturing variable knop yarn Expired - Lifetime US3914930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3800372A GB1441923A (en) 1972-08-15 1972-08-15 Variable knop yarns and methods for their manufacture

Publications (1)

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US3914930A true US3914930A (en) 1975-10-28

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US386879A Expired - Lifetime US3914930A (en) 1972-08-15 1973-08-09 Method of manufacturing variable knop yarn

Country Status (7)

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US (1) US3914930A (xx)
JP (1) JPS49124354A (xx)
DE (1) DE2341120A1 (xx)
FR (1) FR2196408B1 (xx)
GB (1) GB1441923A (xx)
NL (1) NL7311183A (xx)
ZA (1) ZA735430B (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523428A (en) * 1980-11-21 1985-06-18 Toray Industries, Inc. Process for manufacturing textured multifilament yarn having alternating twist
US5154044A (en) * 1989-07-21 1992-10-13 L. Payen Et Cie, Societe Anonyme Process and machine for the continuous production of an elastane-based elastic yarn
US5267430A (en) * 1989-07-21 1993-12-07 L. Payen Et Cie Apparatus for the continuous production of an elastane-based elastic yarn

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3438743C2 (de) * 1984-10-23 1987-03-19 Akzo Gmbh, 5600 Wuppertal Verfahren zum Herstellen eines volumenarmen Effektgarns

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731789A (en) * 1956-01-24 holder
US3113413A (en) * 1959-06-08 1963-12-10 Eastman Kodak Co Apparatus and method for producing volumized slub yarn
US3199283A (en) * 1958-04-18 1965-08-10 Celanese Corp Strong slub yarn
US3357171A (en) * 1966-02-25 1967-12-12 Kendall & Co Variable denier wrapped yarn
US3438194A (en) * 1966-11-24 1969-04-15 Bemberg Spa Process for the manufacture of a composite yarn which is provided with spaced slubs
US3640064A (en) * 1970-01-19 1972-02-08 Celanese Corp Novelty yarn
US3685268A (en) * 1970-05-08 1972-08-22 Chavanoz Moulinage Retorderie Method and apparatus for use in the production of fancy yarns
US3756005A (en) * 1972-03-24 1973-09-04 Chavanoz Sa Process and apparatus for forming novelty effect yarns

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1908219A1 (de) * 1969-02-19 1970-09-10 Kunstseiden Ag Verfahren zur Herstellung eines wolleaehnlichen Mischfadens

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2731789A (en) * 1956-01-24 holder
US3199283A (en) * 1958-04-18 1965-08-10 Celanese Corp Strong slub yarn
US3113413A (en) * 1959-06-08 1963-12-10 Eastman Kodak Co Apparatus and method for producing volumized slub yarn
US3357171A (en) * 1966-02-25 1967-12-12 Kendall & Co Variable denier wrapped yarn
US3438194A (en) * 1966-11-24 1969-04-15 Bemberg Spa Process for the manufacture of a composite yarn which is provided with spaced slubs
US3640064A (en) * 1970-01-19 1972-02-08 Celanese Corp Novelty yarn
US3685268A (en) * 1970-05-08 1972-08-22 Chavanoz Moulinage Retorderie Method and apparatus for use in the production of fancy yarns
US3756005A (en) * 1972-03-24 1973-09-04 Chavanoz Sa Process and apparatus for forming novelty effect yarns

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523428A (en) * 1980-11-21 1985-06-18 Toray Industries, Inc. Process for manufacturing textured multifilament yarn having alternating twist
US5154044A (en) * 1989-07-21 1992-10-13 L. Payen Et Cie, Societe Anonyme Process and machine for the continuous production of an elastane-based elastic yarn
US5267430A (en) * 1989-07-21 1993-12-07 L. Payen Et Cie Apparatus for the continuous production of an elastane-based elastic yarn

Also Published As

Publication number Publication date
DE2341120A1 (de) 1974-02-28
AU5919473A (en) 1975-02-20
ZA735430B (en) 1974-07-31
JPS49124354A (xx) 1974-11-28
FR2196408A1 (xx) 1974-03-15
FR2196408B1 (xx) 1977-07-29
NL7311183A (xx) 1974-02-19
GB1441923A (en) 1976-07-07

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