US3357655A - Continuous filament yarn having low and variable twist method of making same - Google Patents

Continuous filament yarn having low and variable twist method of making same Download PDF

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Publication number
US3357655A
US3357655A US454138A US45413865A US3357655A US 3357655 A US3357655 A US 3357655A US 454138 A US454138 A US 454138A US 45413865 A US45413865 A US 45413865A US 3357655 A US3357655 A US 3357655A
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United States
Prior art keywords
yarn
package
twist
speed
continuous filament
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.)
Expired - Lifetime
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US454138A
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English (en)
Inventor
Iwnicki Kurt
Derek J Wood
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British Nylon Spinners Ltd
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British Nylon Spinners Ltd
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Publication date
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    • 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
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/28—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association
    • D01H1/30—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association with two or more speeds; with variable-speed arrangements
    • D01H1/305—Speed control of the spindles in response to the displacements of the ring rail
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H2700/00—Spinning or twisting machines; Drafting devices
    • D01H2700/24—Spinning or twisting machines of different kinds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S57/00—Textiles: spinning, twisting, and twining
    • Y10S57/908—Jet interlaced or intermingled

Definitions

  • the filaments of the yarn are interlaced by air jet means after drawing and before wind-up.
  • the yarn in the resulting package has low uni-directional twist decreasing in value from inside to outside of the package and has a compensatory degree of inter-filament cohesion along its length independent of uni-directional twist and sufficient to impart to the yarn as a whole the handling properties of a similar yarn twisted to a twist of at least 0.15 turn per inch.
  • the invention concerns improvements in or relating to continuous filament yarn having low and variable twist.
  • the filaments may be obtained by causing the filaments lightly to adhere to one another by the application to the filaments of a solvent or softener therefor.
  • the necessary cohesion is produced by the application of alternating twist by friction from the sides of a special traverse guide.
  • the cohesion is produced by filament-interlacing in defined plural air vortices.
  • the present invention is concerned with just such an improvement in productivity and with the yarn produced thereby.
  • the invention is derived, in part, from an appreciation of the part played by the ring traveller in ring spindle apparatus of the kind employed, for instance, as the Windup on a drawtwister on which nylon continuous filament yarns are drawn and twisted.
  • the ring traveller has the ability and function to match the drawing speed to the winding-on speed of the yarn on the drawtwist bobbin. It has now been appreciated that if the twist inserting function of the ring traveller is reduced to its secondary function, rather than its primary one, and the traveller is employed solely to match the drawing speed to the winding-on speed and to impart suificient tension to the yarn to pull it, or at least to assist to pull it, from the draw roll, then the rotational speed of the traveller can be greatly reduced from that normally required and a concomitant gain achieved in the windingon speed and consequently in drawtwister productivity.
  • the yarn when formed into fabric, is a compact and yet full-bodied filamentary structure, for its size. Furthermore, if the yarn is simply required as the supply for further yarn processing, for instance by crimping or other forms of bulking, then the absence from it of any marked twist and any marked other inter-filament cohesion, for instance, filament interlacing, can usually be regarded as an advantage.
  • a compact multifilament, continuous filament yarn having a low unidirectional twist of less than A turn per inch variable along its length and having a compensatory degree of inter-filament cohesion along its length independent of uni-directional twist and sufiicient to impart to the yarn as a whole the handling properties of a similar multifilament, continuous filament'yarn twisted to a twist of substantially at least 0.15 turn per inch.
  • such a yarn has at least substantially constant inter-filament cohesion prop erties,derived from the twist and the added cohesion along its length.
  • the test of inter-filament cohesion may be the hook drop test of specification No. 924,089; the knots per meter test of French specification No. 1,347,444; or the test in which the air pressure to give a given number of filament loops in the yarn, in a turbulencejet, is measured.
  • a yarn package having tapered end-portions and being built with each successive layer at a constant package winding radius greater than that of the preceding layer, the yarn in said package being a compact multifilament, continuous filament yarn having ,a low unidirectional twist decreasing in value from inside to outside of the package, and having a compensatorydegree of interfilament cohesion along its length independent of unidirectional twist and sufficient to impart to the yarn as a whole the handling properties of a similar multifilament, continuous filament yarn twisted :to a twist of substantially at least 0.15 turn per inch.
  • the yarn in such package has atleast substantially constant inter-filament cohesion properties throughout the package.
  • the added inter-filament cohesion can be achieved by filament interlacing, for instance by passing the yarn on its passage from the draw-roll of a draw-twister axially through a twin-cone air jet; or by imparting rapidly alternating twist of a net value of zero; or, again, by employing a spinning finish on the yarn to be drawn and twisted which finish has a degree of 'tackiness sufficient to cause the filaments lightly to adhere together. Or it may be achieved by a combination of any or all of the above alternative methods.
  • Such compensation can automatically be brought about by filament-interlacing compactingdevices of the air jet level drops,-and this progressive .increase in interlacing can be made exactly to compensate for the progressive decrease in twist by suitable programming of the reduction in spindle speed.
  • a process for producing a yarn or a yarn package both as defined above, which process includes the steps of forwarding multifilament, continuous filament yarn from the periphery of a roll rotating at a constant speed, winding the yarninto a package by a ring spindle device in a package build having the length of traverse stroke progressively decreasing throughout the-build, the speed of rotation of-the spindle of said ring spindle device decreasing throughout the build in a manner such as to maintain constantthe-speed of rotationof the ring traveller at a minimum value consonant with its imparting sufficient tension to the yarn to pull it"from said roll.
  • An interfilament cohesion treatment may be imparted to the yarn prior to its being forwarded by the said roll, or afterwards; but preferably it is imparted to the yarn on its passage between said roll and said ring spindle device.
  • a filament-interlacing air jet it is imparted by a filament-interlacing air jet, so that as the balloon tension falls during the doff and the twist level drops, so the degree of interlacing increases, and the level of filament cohesion along the yarn can be maintained substantially constant if desired.
  • the air jet can be of a kind such as the double-cone jet above referred, which has also a slight forwarding effect on the yarn, so that the-yarn is assisted to depart freely from the periphery of the roll, e.g. a draw-roll, whereby a lower tension in the ballooning yarn can be tolerated.
  • lighter travellers than normal may be employed, and reduction in traveller back wear-thus achieved.
  • FIGURE 1 is-a diagram of the items of apparatusused in the embodiment which comprises draw-twisting
  • FIGURE 2 is --a diagram of a yarn package according to-the invention.
  • FIGURE 3 is a diagram of a portion of yarn according to the invention.
  • FIGURE 1 depicts a draw-twister for e.g. nylon yarn,'with means for programming thereduction inthe spindle speed during the building of'a so-called longto-short, half-cycle yarn package.
  • the yarn is stretched by passing it with -a plurality of wraps around snubbing-pin 11 and drawing it :therefrom, :at a rate several times that of the peripheral speed ;of feed roll ,5, by ,draw roll 13.
  • the yarn makes a plurality of wraps around :the periphery of draw roll 13, the wraps being kept apart by separator roll 15.
  • the wind-up comprises the standard ring spindle, consisting of balloon guide 19, ring 21 and traveller 23, with take-up package 25 rotatably driven by spindle 26.
  • the spindle is driven by belt 27 which is passed in driving engagement with wharl 29.
  • the driving end of belt 27 is a pulley 31 on a shaft 33 rotating within bearings in the diagrammatically depicted device 35 for programming spindle speed variation.
  • a ring of 5% inch diameter was used on a nylon drawtwister, at which diameter the practical minimum speed of the ring traveller was calculated to be 1000 rpm.
  • the winding-on speed of the yarn was constant at 6,600 feet/min. throughout the doff, the spindle speed being varied to decrease from 15,000 r.p.m. at the start of winding to 6,100 rpm. at the finish of winding.
  • the twist in a nylon multifilament continuous filament yarn so produced varied from 0.19 t.p.i. at the inside to 0.08 t.p.i. at the outside of the package.
  • the air jet interlacer 17 between the draw-roll 13 and the ring spindle wind-up compensatively increased the filament cohesion to a value which was substantially equivalent to turn per inch twist in a similar yarn that solely possessed that twist as the interfilament cohesion agency. Compensation was arranged to be substantially proportional to the twist decrease, by suitable programming of the spindle speed variation by device 35.
  • FIGURE 2 the parallel layers 37 of yarn in the yarn package are shown very diagrammatically, starting with the longest traverse length nearest to the barrel of the container 39.
  • FIGURE 3 again very diagrammatically, it can be seen how the filaments 41 of the yarn are interlaced with one another and have a helical configuration due to a low amount of twist.
  • the filaments are shown in more open condition than will actually be the case.
  • nylon multifilament, continuous filament yarns have been specified, as has a ring spindle twist-inserting wind-up. It is to be understood however, that the invention is not limited to any particular yarn material, nor to variable twist inserted by such ring spindle apparatus. For instance, all other multifilament synthetic and cellulosic continuous filament yarns are comprehended in the invention; and another example of twist-inserting wind-up device is the cap spinner.
  • a yarn package having tapered end-portions and being built with each successive layer at a constant package winding radius greater than that of the preceding layer, the yarn in said package being a compact multifilament, continuous filament yarn having a low uni-directional twist decreasing in value from inside to outside of the package and having a compensatory degree of interfilament cohesion along its length independent of unidirectional twist and suflicient to impart to the yarn as a Whole the handling properties of a similar multifilament,
  • a process for winding a yarn package having tapered end-portions comprising the steps of (a) forwarding multifilament, continous filament yarn from the periphery of a roll rotating at a constant speed,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US454138A 1964-05-15 1965-05-07 Continuous filament yarn having low and variable twist method of making same Expired - Lifetime US3357655A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20315/64A GB1068625A (en) 1964-05-15 1964-05-15 Improvements in or relating to continuous filament yarn having low and variable twist

Publications (1)

Publication Number Publication Date
US3357655A true US3357655A (en) 1967-12-12

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US454138A Expired - Lifetime US3357655A (en) 1964-05-15 1965-05-07 Continuous filament yarn having low and variable twist method of making same

Country Status (7)

Country Link
US (1) US3357655A (fr)
BE (1) BE663978A (fr)
CH (1) CH452410A (fr)
DE (1) DE1510536A1 (fr)
GB (1) GB1068625A (fr)
LU (1) LU48606A1 (fr)
NL (1) NL6506185A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450371A (en) * 1966-07-04 1969-06-17 Ici Ltd Polyamide yarn packages with tapered end-portions and their production
US3477221A (en) * 1966-04-14 1969-11-11 Glanzstoff Ag Process for improving the uniformity of the modulus of elasticity in a draw twist wound thread cop
US3498044A (en) * 1968-11-15 1970-03-03 Stevens & Co Inc J P Method for producing a latent texturized yarn
US3537248A (en) * 1967-06-19 1970-11-03 Glanzstoff Ag Simultaneously twisting and interlacing a continuous multifilament yarn
US3552679A (en) * 1967-11-17 1971-01-05 Ici Ltd Yarn package
US3665696A (en) * 1970-03-23 1972-05-30 Celanese Corp Yarn packaging
US3724197A (en) * 1969-10-20 1973-04-03 Tmm Research Ltd Methods of and apparatus for drawtwisting textile yarns or filaments
US3724199A (en) * 1970-04-20 1973-04-03 Monsanto Co Process for making continuous filament heather yarn
US11346022B2 (en) * 2016-07-15 2022-05-31 Saurer Technologies GmbH & Co. KG Method for starting a spindle of a cabling or two-for-one twisting machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083523A (en) * 1958-08-01 1963-04-02 Du Pont Twistless, heat relaxed interlaced yarn

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083523A (en) * 1958-08-01 1963-04-02 Du Pont Twistless, heat relaxed interlaced yarn

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3477221A (en) * 1966-04-14 1969-11-11 Glanzstoff Ag Process for improving the uniformity of the modulus of elasticity in a draw twist wound thread cop
US3450371A (en) * 1966-07-04 1969-06-17 Ici Ltd Polyamide yarn packages with tapered end-portions and their production
US3537248A (en) * 1967-06-19 1970-11-03 Glanzstoff Ag Simultaneously twisting and interlacing a continuous multifilament yarn
US3552679A (en) * 1967-11-17 1971-01-05 Ici Ltd Yarn package
US3498044A (en) * 1968-11-15 1970-03-03 Stevens & Co Inc J P Method for producing a latent texturized yarn
US3724197A (en) * 1969-10-20 1973-04-03 Tmm Research Ltd Methods of and apparatus for drawtwisting textile yarns or filaments
US3665696A (en) * 1970-03-23 1972-05-30 Celanese Corp Yarn packaging
US3724199A (en) * 1970-04-20 1973-04-03 Monsanto Co Process for making continuous filament heather yarn
US11346022B2 (en) * 2016-07-15 2022-05-31 Saurer Technologies GmbH & Co. KG Method for starting a spindle of a cabling or two-for-one twisting machine

Also Published As

Publication number Publication date
NL6506185A (fr) 1965-11-16
LU48606A1 (fr) 1965-07-15
DE1510536A1 (de) 1969-07-17
BE663978A (fr)
CH452410A (de) 1968-05-31
GB1068625A (en) 1967-05-10

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