US3591955A - Process for producing a slub yarn - Google Patents

Process for producing a slub yarn Download PDF

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Publication number
US3591955A
US3591955A US835553A US3591955DA US3591955A US 3591955 A US3591955 A US 3591955A US 835553 A US835553 A US 835553A US 3591955D A US3591955D A US 3591955DA US 3591955 A US3591955 A US 3591955A
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United States
Prior art keywords
yarn
hood
gas
slub
stream
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Expired - Lifetime
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US835553A
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English (en)
Inventor
Shiro Fujita
Jusuke Ushiki
Nagao Nishizawa
Seiji Okawa
Kunio Sekiya
Hiroshi Kadowaki
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Nippon Rayon Co Ltd
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Nippon Rayon Co 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
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • 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

  • Jusuke Ushiki isezaki-shi; Nageo Nkhizawa, Matsndmshi; Seiji Okewa, Wmbi-sld; Kunio Sekiye, Matsudo-shi; Hiroshi Kadnwnki, Matsudo-shi, all oi, Japan June 23, 1969 July 13, 1971 Nippon Rayon Co. Ltd.
  • ABSTRACT A process for producing slubs onto a multifilament yam which comprises feeding the yarn into a hood receiving a jet of compressed gas and withdrawing the yarn through a hole of the hood frorn the deflected stream of the gas at lower rate than the feed rate.
  • SHEET 8 BF 8 PROCESS FOR PRODUCING A SLUB YARN BACKGROUND OF THE INVENTION It has long been known that a multifilament yarn can be slubbed by passing through a high-velocity stream of compressive fluid. In the presently known process a jet of fluid is used to introduce coils, loops and folds along the filaments forming the yarn. In any one of these process, the jet is not effectively and economically used but has been required to provide otherwise a slub jet for a sole purpose of forming the slubs. This imposes a high-consumption of the compressive fluid and high maintenance costs upon the operation, rendering the products very expensive.
  • the present invention is directed to eliminate the conventional slub jet by substituting deflected flow of the supply jet for the slub jet.
  • Another object of the present invention is to provide a slub yarn in which slubs are tightly formed by continuous filaments at irregular intervals in its length.
  • FIG. I schematically shows a preferred embodiment of the apparatus for carrying out the process according to the present invention.
  • FIG. 2 shows a perspective view of the hood in FIG. I partially cut away to illustrate its inner configuration and slubbing.
  • FIG. 3 schematically shows another type of apparatus for carrying out the process according to the invention.
  • FIG. 4 shows a cross-sectional view taken along IV-IV line of FIG. 9.
  • FIGS. 5 to 8 show schematically broken, side views greatly enlarged of slub yarns which can be produced in accordance with the invention.
  • FIG. 9 shows schematically another type of the apparatus for carrying out the process according to the invention.
  • FIG. 10 and FIG. II schematically and partially shown broken, perspective views of the hoods.
  • FIG. 12 schematically shows an embodiment of the moving means.
  • FIG. 13 schematically shows main parts of a jet loom used for weaving the slub yarn.
  • FIG. I there is shown a preferred embodiment of the apparatus for carrying out the process according to the invention.
  • the multifilament yarn l is withdrawn from-a letoff package 2 through pigtail guide 3 and tension disc 4, by a pair of feed rolls 5 and 6, the yarn passing a sufficient number of times around the pair of rolls to provide positive control of the feed rate.
  • the yarn then enters into nozzle 7 through its hole 8 and advances toward the dome-shaped apex of hood 9 with a highvelocity stream of gas introduced into the rear end of the nozzle by pipe 10.
  • the stream of gas flowing along one side of the hood due to the fact that the longitudinal axis of the straight nozzle 7 is offset from the longitudinal axis of the hood on which the yarn withdrawal hole 16 is located is deflected along the concave surface of the apex and escapes backwardly. After deflection, the stream of gas serves to slub the yarn passing in countercurrent direction.
  • the yarn is then dashed against the apex of the hood by the stream and the excess length of overfeed is then folded back on the subsequently continuing portion of the yarn by the deflection of the stream. It will be understood that a certain continuance of this state might eventually allow time for forming a slub with each filament in entanglement.
  • the slub thus produced is then withdrawn through the hole 16 at the apex by withdrawal rolls 11 and 12 similar to feed rolls 5 and 6, but operated at lower speed.
  • the yarn passes after leaving the withdrawal rolls to a conventional windup, such as a package 13 surface driven by a takeup roll 14 through traverse guide 15.
  • the hood is shown in greatly enlarged state.
  • the filaments are folded back on themselves by the defected stream of gas.
  • both feed and withdrawal are kept at constant speed during the operation, formation of slubs arises intermittently.
  • the excess length of the overfeed should be controlled in a range that the overfeed is quite sufficient to insure in the yarn always necessary folds of filaments to, produce the slub, but under all circumstances opposes a minimum obstruction to a stoppage of advancement into which an extremely excess feeding will fall.
  • FIG. 3 there is combined a fluid false twister 17 with the apparatus as described above.
  • the other parts except the false twister are similar to corresponding parts of the apparatus of FIG. I.
  • the fluid false twister has fluid conduits I8 and I9, entering a cylindrical yarn passage way 20 from opposite sides as shown in FIG. 4.
  • the fluid conduits I8 and 19 are secured to the body in tangential relationship with respect to the section of the yarn passageway, whereby a vortex stream exerted along the direction of the arrow introduces an alternate twist in the yarn.
  • An enlarged illustration of the slub produced by the practice of the invention is shown in from FIG. 5 to FIG. 8.
  • a state ofthe slub immediately after leaving the hood is seen in FIG. 5, which varies to a state of FIG. 6 by passing through the fluid false twister 17. It will be seen that the left side portion of the slub has an S twist, hile the right side portion has a Z twist.
  • FIGS. 10 and 11 there are shown two types of the hole of the hood.
  • the hole 16' of FIG. l0. has a recess closely neighboring with the hole which recess increases its depth to an increasing degree of approach to the hole. This serves to control the direction of the deflected stream and formation of slub is attained in a somewhat greater complication of loops of the filament than is formed by the hood having the hole 16 as shown in FIG. 11.
  • FIG. 9 there is provided a yarn-scrubbing device 21 in which three poles 22 are secured on a body 23 in parallel with each other and two separaters 24 are secured in contact with two neighboring poles.
  • the yarn passes through a reverse curve formed by the poles in frictional contact with the poles under urging of the withdrawal rolls.
  • the slubs are leaned in adverse direction against the advancement of the yarn as shown in FIG. 7.
  • the yarn shown in FIG. 8 is a product obtained by passing through both the scrubbing device and fluid false twister in this order. 7
  • FIG. 12 is shown an eccentric disc 25, moving friction means, which serves as a false twister.
  • the shaft 26 is mounted eccentrically to the disc.
  • the yarn running along the shaft intermittently and frictionally contact with the surface of the disc as the disc rotates. gaining an alternate twist in its length.
  • the disc may be substituted for the fluid false twister for the purpose of practicing the invention.
  • FIG. 13 schematically and partially shows one type of jet loom for weaving the slub yarn as a weft.
  • the slub yarn is supplied from a supply'package 27 through guide 28 and 29, tensor 30, guide 31, and a pair of feed rolls 32 and 33 to pool pipe 34.
  • the yarn is then withdrawn from the pool pipe 34, and the yarn passes through a pair of nip members 35.
  • the yarn then is jetted with water by the nozzle 36.
  • the nip members intermittently nip the slub yarn in accordance with a jetting cycle.
  • the multifllament yarn When the multifllament yarn is overfed into the deflected stream flowing backwardly from the apex of the hood, the numerous filaments forming the yarn are separated in any number of groups which are simultaneously folded back on themselves with each group in an entanglement. It is found that an irregularity of intervals of the slubs results on the yarn from a cooperation between the yams overfeed and passage in adverse direction against the flow of the deflected stream of the gas. It is noted that such irregular characteristic is essential to make the resultant yarn applicable in the commercial field.
  • hood Any type of hood will sufficiently be employed for the purpose of practicing the present invention, so far as desired deflection of the stream is obtained. It is. preferred that the inner surface of the hood, at least the surface in the vicinity of the apex, is smoothly curved to insure the stream an efficient flowing and deflection. It is also found that the compressive gas is jetted in the chamber of the hood and the centerline of the jetted stream of gas is offset from the central, i.e. longitudinal axis of the hood.
  • Any kind ofgas may be used in practicing the invention, if it is harmless and the pressure of the jet is controlled in a range of from 0.5- KgJcm. under a guage pressure. This range is not severe and a latitude should be permitted in a somewhat lower range than 0.5 Kg./cm. In view of ready availability and lower cost, air is beneficially selected for the practice of the invention.
  • the overfeed length of the yarn is found applicable in the range of 05-50 percent relative to the withdraw, the range of about 2 percent is found beneficial.
  • overfeed is defined as:
  • the yarn may be supplied to the deflected stream either directly or otherwise through a jetting nozzle and one or more of a plurality of yarns may be used in doubled state to acquire a particular effect on the resultant yarn.
  • any one or more of them may be supplied separately from the other by passing through the jetting nozzle or not.
  • a vortex stream of gas may be utilized to impart a false twist to the yarn after leaving the hood.
  • the pressure ofthe vortex gas is regulated in the range of about 0.5-5 KgJcmF.
  • Any other type of false twister such as friction disc, may be used for the same purpose.
  • d value (a low d value means a high stability), which is determined in the following manner.
  • a sample yarn of 20 centimeters length having one slub in its length was supported horizontally in a tension state by fixing at both ends.
  • a weight of (deniers of monofilament X 0.01 grams was then suspended by one of a plurality of loops of the slub by means of hanger hook. After sufficiently allowing the loop to loose by the load of the weight, an amount of a downward shift exhibited by the weight was measured. The same tests were repeated 200 times as to the sample yarns of the same nature. From the obtained values, there was yielded an arithmetic mean value representing 2 value.
  • each of which is substantially similar to the embodiment of FIG. 1 except that each is provided with a yarn scrubbing device 17.
  • a process for producing a slub yarn which includes the A. Type of yarn treated (total denier/filaments) steps of: B. Feed speed ofyam (meter per minute) 20 a. jetting a stream of compressive gas into a hood having a C. Withdrawal speed of yarn (meter per minute) hole at the apex thereof to deflect at the apex and to D. Pressure of compressive air used for deflected stream escape backwardly,
  • Center lntlS of nozzle used was in parallel with axis of the deflected stream of gas in a countercurrent direction hood to form slubs composed of filament loops consolidated 2.
  • Nozzle was located on the maximum axis of the elliptical section ofthe hood in examples except Example 9 3.
  • Nozzle was located on the minimum axis of the elliptical section of the hood in Example 9 into the yarn by filament entanglement. 2.
  • the process as defined in claim 1 wherein the centerline of the jetted stream of gas is offset from the central axis of the hood.
  • the slub yarn obtamed by the process of Example 2 was g woven imo warp of polyethylene oxybenzoate yam (50 4. process of claim 1 wherezin the pressure of the comdeniers/36 filaments) having no slub, by using an embodiment presswe gas 15 at least of the water jet loom as shown in HQ 5 5 5.
  • a process for producing a slub yarn which includes the Average denier of slubs in the slub yarn was about 510 stepshfi deniers a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US835553A 1968-06-27 1969-06-23 Process for producing a slub yarn Expired - Lifetime US3591955A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4469168 1968-06-27
JP4469268 1968-06-27

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US3591955A true US3591955A (en) 1971-07-13

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US (1) US3591955A (enrdf_load_stackoverflow)
CH (1) CH489633A (enrdf_load_stackoverflow)
FR (1) FR2014322A1 (enrdf_load_stackoverflow)
GB (1) GB1235573A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823541A (en) * 1970-10-22 1974-07-16 Rhodiaceta Effect voluminous yarn
US3950831A (en) * 1973-07-06 1976-04-20 Basf Farben And Fasern Ag Apparatus for the manufacture of crimped filaments
US3999366A (en) * 1972-01-11 1976-12-28 Hoechst Aktiengesellschaft Slub yarns obtained from blowing and sucking process
US5590447A (en) * 1995-10-06 1997-01-07 Milliken Research Corporation Continuous process from interlacing to warping to provide a heather yarn
US5682656A (en) * 1996-02-29 1997-11-04 Milliken Research Corporation Continuous process to wrap entangled yarn
CN116497494A (zh) * 2023-06-30 2023-07-28 江苏恒力化纤股份有限公司 一种保暖起绒纱及其制备方法和装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146180B2 (enrdf_load_stackoverflow) * 1973-07-12 1976-12-07
IT1076859B (it) * 1977-01-24 1985-04-27 Montefibre Spa Dispositivo perfezionato per l'interblacciamento di fili continui multibava

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118269A (en) * 1964-01-21 Method and apparatus for producing a novelty bulked yarn
US3262177A (en) * 1961-11-01 1966-07-26 Owens Corning Fiberglass Corp Apparatus for producing novelty bulked yarn
US3296785A (en) * 1964-07-30 1967-01-10 Du Pont Production of interlaced plied yarn from slub yarn and carrier yarn by means of fluid jets
US3433007A (en) * 1966-07-29 1969-03-18 Du Pont Slub yarn process and product
US3517498A (en) * 1967-06-22 1970-06-30 Rodiaceta Apparatus and method for producing a doupion thread

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3118269A (en) * 1964-01-21 Method and apparatus for producing a novelty bulked yarn
US3262177A (en) * 1961-11-01 1966-07-26 Owens Corning Fiberglass Corp Apparatus for producing novelty bulked yarn
US3296785A (en) * 1964-07-30 1967-01-10 Du Pont Production of interlaced plied yarn from slub yarn and carrier yarn by means of fluid jets
US3433007A (en) * 1966-07-29 1969-03-18 Du Pont Slub yarn process and product
US3517498A (en) * 1967-06-22 1970-06-30 Rodiaceta Apparatus and method for producing a doupion thread

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823541A (en) * 1970-10-22 1974-07-16 Rhodiaceta Effect voluminous yarn
US3999366A (en) * 1972-01-11 1976-12-28 Hoechst Aktiengesellschaft Slub yarns obtained from blowing and sucking process
US3950831A (en) * 1973-07-06 1976-04-20 Basf Farben And Fasern Ag Apparatus for the manufacture of crimped filaments
US5590447A (en) * 1995-10-06 1997-01-07 Milliken Research Corporation Continuous process from interlacing to warping to provide a heather yarn
US5682656A (en) * 1996-02-29 1997-11-04 Milliken Research Corporation Continuous process to wrap entangled yarn
CN116497494A (zh) * 2023-06-30 2023-07-28 江苏恒力化纤股份有限公司 一种保暖起绒纱及其制备方法和装置
CN116497494B (zh) * 2023-06-30 2023-09-22 江苏恒力化纤股份有限公司 一种保暖起绒纱及其制备方法和装置

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CH489633A (de) 1970-04-30
DE1931484A1 (de) 1970-02-19
GB1235573A (en) 1971-06-16
FR2014322A1 (enrdf_load_stackoverflow) 1970-04-17

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