US2959909A - Bulked yarn and method for producing same - Google Patents

Bulked yarn and method for producing same Download PDF

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Publication number
US2959909A
US2959909A US649719A US64971957A US2959909A US 2959909 A US2959909 A US 2959909A US 649719 A US649719 A US 649719A US 64971957 A US64971957 A US 64971957A US 2959909 A US2959909 A US 2959909A
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United States
Prior art keywords
yarn
bulked
filaments
spun
present
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Expired - Lifetime
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US649719A
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English (en)
Inventor
Ansel C Sutherland
Hilliard H Penland
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Akzona Inc
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American Enka Corp
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Filing date
Publication date
Priority to LU35855D priority Critical patent/LU35855A1/de
Application filed by American Enka Corp filed Critical American Enka Corp
Priority to US649719A priority patent/US2959909A/en
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Publication of US2959909A publication Critical patent/US2959909A/en
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Expired - Lifetime legal-status Critical Current

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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
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam

Definitions

  • This invention relates to a new and improved bulky continuous filament yarn and more particularly relates to a method for producing a new and improved relatively inelastic bulky yarn from a wet regenerated cellulose continuous multifilament yarn provided with some twist.
  • Another object of the present invention is to provide a method for producing a bulked continuous multifilament yarn having unusually high bulk and covering power.
  • a further object of the present invention is to provide this bulk and covering power without substantially increasing the weight of the yarn needed to accomplish this.
  • Still another object of the present invention is to provide a product having the aforesaid desirable properties.
  • Figure 1 is a schematic view illustrating a freshly spun, undried yarn being drawn from a cake and passed through a bulking yarn jet;
  • Figure 2 is a side view in section of a yarn jet per se.
  • Figure 3 is an enlarged photograph of bulked yarn produced by the present invention compared with yarn bulked after it has been dried.
  • numeral 10 designates a cake of freshly spun, twisted, yarn.
  • the yarn 11 is withdrawn upwardly and around roller 12 which is freely rotatable and defines the direction of the yarn travel.
  • Yarn 11 is propelled through positively driven feed rollers 13 and drawn into notch 14 of the jet generally indicated at 15.
  • Gas under pressure is supplied to inlet pipe 16 from a source not shown which propels the yarn through and out of exit conduit 17.
  • inlet pipe 16 from a source not shown which propels the yarn through and out of exit conduit 17.
  • the direction of yarn travel is changed while the yarn is still under the influence of the stream of gas.
  • the yarn is impinged on and deflected from baffle plate 18. The impinging against the plate causes the direction of the yarn travel to change and also disrupts the flow of the gas.
  • the yarn is taken up in an orderly arrangement in a package 19 on a bobbin 20 which is rotated at a constant peripheral speed by a driving mechanism (not shown). Between bobbin 20 and baflle 18 there is positioned a pair of feed and delivery rollers 21 which are rotated at a lower peripheral speed than rollers 13 to provide an overfeed of the yarn to the jet and also permit some con traction due to bulking.
  • the yarn while on the bobbin,
  • the direction of yarn travel is changed to a path which is at least 90 from the direction of the gas flowing from the jet.
  • FIG. 2 shows in more detail the structure of jet 15. Gas is supplied to inlet pipe 16 through opening 22 and into a reduced channel 23 which terminates at one side of notch 14. Notch 14 is provided with a low pressure zone 24 which induces yarn 11 to pass into an enlarged channel 25.
  • a more detailed description of the bulking yarn jet and baffle together with other modifications thereof may be seen by referring to US. Patent No. 2,874,444.
  • FIG. 3 where the specific product shown is viscose rayon.
  • A designates 2250/ 150 viscose rayon yarn which was bulked in a dry state in accordance with the procedure of Example II of the present application.
  • Many of the exterior filaments are notably looped and curled. Furthermore, the filaments which are not looped or curled are in a compact arrangement.
  • the product of the present method is represented by the letter B.
  • the yarn illustrated here is also 2250/ viscose rayon and was bulked in accordance with the procedure of Example I of the present application.
  • the product is characterized by an unusually high bulky structure.
  • the filaments from the interior to the exterior thereof are disturbed, separated and entangled among each other. This entanglement provides an integrated, bulky body with substantially all of the filamentslcontributing to the strength of the yarn,
  • Each filament is' pronouncedly sinuated and undulated.
  • the wavy structures which wind over and around jadjacent filaments provide a great degree of inter-filament friction which enables the yarn to withstand transverse forces and still retain its well-defined strandular shape even though highly bulked.
  • the twist of the yarn before it is subjected to the bulking operation is of critical importance to the present invention.
  • the filaments of untwisted yarn when bulked will separate without the entanglement and sinuation necessary for the yarn to retain its permanency of bulk and its well-defined strandular form.
  • the degree of bulk is greatly reduced when untwisted yarn is used. For example, by using untwisted viscose rayon the yarn when bulked by the present invention falls short to a considerable degree in obtaining the bulky characteristics imparted to the same yarn which has been pretwisted.
  • An important feature of the present invention lies in the fact that it may easily be adapted to conventional viscose rayon spinning schemes.
  • a viscose solution is spun into yarn in a setting bath.
  • the yarn thus formed is collected in a centrifugal pot which rotates at a high speed.
  • the rotation of the pot causes the group of filaments to be twisted into yarn having a suitable twist, for example, two turns per inch.
  • the yarn is subjected to several aftertreatments consisting of washing desulphurizing, bleaching and drying.
  • the yarn is bulked just prior to the usual drying operation. This may be accomplished without an additional twisting operation and with only minor changes in the processing equipment.
  • the yarn produced by the present invention is more particularly characterized by its voluminous and inelastic body and relatively low increase in total denier. It has been found that the body diameter of yarn bulked according to the present invention is considerably greater than yarn bulked after it has been dried. The body diameter is the cross-sectional distance between the points at which the body of the yarn is well defined. The Wavy filaments projecting at random intervals from the body of the yarn should be regarded as forming no part of the yarns body.
  • a most surprising result of the present invention lies in the fact that the aforesaid increase in voluminosity does not necessarily require a large increase in denier. Experiments have shown that good bulking may be obtained with about a or less increase in total denier.
  • Example I 2250/ 150 viscose rayon continuous filament yarn having a Z-twist of 2.0 turns per inch was withdrawn from a cake of freshly spun yarn which had been spun into a conventional spin pot.
  • the yarn had previously been washed, bleached and partially hydro-extracted.
  • the moisture content of this gel yarn was 55% by weight.
  • the yarn was directed through the suction device of Figure 2.
  • An air pressure of 75 pounds per square inch was supplied at auniform rate to the air supply tube.”
  • the direction of the yarn was changed about 120 degrees after which the yarn was collected on a rotating bobbin driven at a constant peripheral speed.
  • the yarn was dried on the bobbin in a tunnel drier.
  • the yarn take-up speed was 91 yards per minute with 4 an overfeed of 18.5%.
  • the average body diameter of the yarn dried without bulking was 0.85 mm. while the body diameter of the bulked yarn was 1.05 mm. for an overall body diameter increase of 23.5%.
  • Example II For comparison purposes, 2250/ viscose rayon continuous filament yarn having a Z-twist of 2.0 turns per inch was withdrawn from a cake of yarn which had been aftertreated and dried in the usual manner. Without wetting, the dry yarn was bulked in the manner described in Example I.
  • the bulky characteristics of this yarn was attributable almost exclusively to the disturbance imparted by the process to the outer filaments, inasmuch as the main body of the yarn remained substantially unchanged.
  • the average body diameter of the yarn was 0.93 mm. with the increase in body diameter before and after bulking amounting to 9.4%.
  • freshly spun yarn or gel yarn refers to yarn which has never been dried subsequent to the formation thereof.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
US649719A 1957-04-01 1957-04-01 Bulked yarn and method for producing same Expired - Lifetime US2959909A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
LU35855D LU35855A1 (en:Method) 1957-04-01
US649719A US2959909A (en) 1957-04-01 1957-04-01 Bulked yarn and method for producing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US649719A US2959909A (en) 1957-04-01 1957-04-01 Bulked yarn and method for producing same

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US2959909A true US2959909A (en) 1960-11-15

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985995A (en) * 1960-11-08 1961-05-30 Du Pont Compact interlaced yarn
US3093879A (en) * 1959-10-14 1963-06-18 Kurashiki Rayon Co Treatment of multifilament bulk yarns
US3180368A (en) * 1962-01-23 1965-04-27 Prince Jidosha Kogyo Kabushiki Device for projecting weft yarns in fluid jet type shuttleless loom
US3262257A (en) * 1965-05-07 1966-07-26 Du Pont Polypropylene bulked yarn
US3448500A (en) * 1966-05-18 1969-06-10 Owens Corning Fiberglass Corp Method of bulking yarn
US3488670A (en) * 1966-05-18 1970-01-06 Owens Corning Fiberglass Corp Method and apparatus for yarn treatment
US3662440A (en) * 1970-08-17 1972-05-16 Du Pont Process for controlling yarn tension and threadline stability during high speed heat treating of the yarn
US3881232A (en) * 1974-06-26 1975-05-06 Enterprise Machine & Dev Resonant baffle for yarn texturing air jet
US5212858A (en) * 1990-01-31 1993-05-25 Asten Group, Inc. Apparatus for capturing and stabilizing a yarn

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026736A (en) * 1932-12-01 1936-01-07 Alexander Wacker Ges Fur Elect Process for the manufacture of woolly threads
US2379824A (en) * 1943-03-06 1945-07-03 Du Pont Process and apparatus for treating artificial filaments
US2504523A (en) * 1948-05-28 1950-04-18 Godfrey Bloch Inc Fabric-making material
US2557433A (en) * 1948-04-17 1951-06-19 Honig Frank Art of producing yarn
US2661588A (en) * 1951-07-19 1953-12-08 American Enka Corp Thread collector
US2783609A (en) * 1951-12-14 1957-03-05 Du Pont Bulky continuous filament yarn
US2807864A (en) * 1954-06-24 1957-10-01 Eastman Kodak Co Composition and process for treating yarn
US2852906A (en) * 1951-12-14 1958-09-23 Du Pont Method and apparatus for producing bulky continuous filament yarn
US2874443A (en) * 1953-05-12 1959-02-24 Du Pont Method and apparatus for crimping yarn

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026736A (en) * 1932-12-01 1936-01-07 Alexander Wacker Ges Fur Elect Process for the manufacture of woolly threads
US2379824A (en) * 1943-03-06 1945-07-03 Du Pont Process and apparatus for treating artificial filaments
US2557433A (en) * 1948-04-17 1951-06-19 Honig Frank Art of producing yarn
US2504523A (en) * 1948-05-28 1950-04-18 Godfrey Bloch Inc Fabric-making material
US2661588A (en) * 1951-07-19 1953-12-08 American Enka Corp Thread collector
US2783609A (en) * 1951-12-14 1957-03-05 Du Pont Bulky continuous filament yarn
US2852906A (en) * 1951-12-14 1958-09-23 Du Pont Method and apparatus for producing bulky continuous filament yarn
US2874443A (en) * 1953-05-12 1959-02-24 Du Pont Method and apparatus for crimping yarn
US2807864A (en) * 1954-06-24 1957-10-01 Eastman Kodak Co Composition and process for treating yarn

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093879A (en) * 1959-10-14 1963-06-18 Kurashiki Rayon Co Treatment of multifilament bulk yarns
US2985995A (en) * 1960-11-08 1961-05-30 Du Pont Compact interlaced yarn
US3180368A (en) * 1962-01-23 1965-04-27 Prince Jidosha Kogyo Kabushiki Device for projecting weft yarns in fluid jet type shuttleless loom
US3262257A (en) * 1965-05-07 1966-07-26 Du Pont Polypropylene bulked yarn
US3448500A (en) * 1966-05-18 1969-06-10 Owens Corning Fiberglass Corp Method of bulking yarn
US3488670A (en) * 1966-05-18 1970-01-06 Owens Corning Fiberglass Corp Method and apparatus for yarn treatment
US3662440A (en) * 1970-08-17 1972-05-16 Du Pont Process for controlling yarn tension and threadline stability during high speed heat treating of the yarn
US3881232A (en) * 1974-06-26 1975-05-06 Enterprise Machine & Dev Resonant baffle for yarn texturing air jet
US5212858A (en) * 1990-01-31 1993-05-25 Asten Group, Inc. Apparatus for capturing and stabilizing a yarn

Also Published As

Publication number Publication date
LU35855A1 (en:Method)

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