WO1993011289A1 - Procede permettant d'effectuer la torsion retors de fils sans utiliser de limiteurs de ballons - Google Patents

Procede permettant d'effectuer la torsion retors de fils sans utiliser de limiteurs de ballons Download PDF

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Publication number
WO1993011289A1
WO1993011289A1 PCT/US1992/010004 US9210004W WO9311289A1 WO 1993011289 A1 WO1993011289 A1 WO 1993011289A1 US 9210004 W US9210004 W US 9210004W WO 9311289 A1 WO9311289 A1 WO 9311289A1
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WO
WIPO (PCT)
Prior art keywords
yarn
balloon
nylon
creel
ply
Prior art date
Application number
PCT/US1992/010004
Other languages
English (en)
Inventor
Jack Renato Dehowitt
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
Publication of WO1993011289A1 publication Critical patent/WO1993011289A1/fr

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Classifications

    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • D02G3/285—Doubled, plied, or cabled threads one yarn running over the feeding spool of another yarn
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2503/00—Domestic or personal
    • D10B2503/04—Floor or wall coverings; Carpets

Definitions

  • This invention relates to a method for ply-twisting nylon yarns coated with less than about 1% by weight of finish.
  • the method involves directing the path of the yarn in a balloon on a cable twister in such a manner that the yarn does not come into contact with balloon limiters.
  • the resulting ply-twisted yarn is especially suitable for use as pile in carpets.
  • Typical ' carpets used in residences include loop pile and cut pile carpets. These carpets are made by inserting heat-set, ply-twisted pile yarn into a backing material. For loop pile carpets, the loops are not cut. For cut pile carpets, which are more common, the loops are cut to form substantially parallel vertical tufts.
  • the yarns which are used in such carpets are prepared by cable-twisting, or ply-twisting, two yarns together, and heat-setting them in their twisted condition, Problems in ply-twisting such yarns are discussed in Polejes, J. D., "Principles of Cable Twister Design and Operation," Canadian Textile Journal. September 1984, pp.. 56-65.
  • a conventional apparatus for ply-twisting the yarns includes a means for feeding one yarn vertically upward from a stationary yarn supply package, located in a yarn supply bucket, and rotating another yarn around the first to form a twisted, combined yarn.
  • the path of the rotating yarn is known as a "balloon".
  • a guide such as a fixed ring or jacket, is used for guiding and restricting the yarn in the balloon. As the yarn travels in the balloon, it comes into physical contact with the guide.
  • These guides, or limiters provide a means for controlling or limiting the extent and tension of the yarn in the balloon and are discussed in more detail in such patents as, Kresslein, U.S. Patent No. 3,065,592, Nimtz et al., U.S. Patent No. 3,094,835, and U.K. Patent 1,094,071.
  • a significant problem in using such conventional balloon guides is the high degree of friction created between the guides and the yarn in the balloon. This results in generating polymer dust, broken filaments, and irregular tension or breaks of the entire yarn. Furthermore, these problems become more pronounced as twisting speeds are raised to attain greater productivity of the cable twister (twisting equipment) .
  • the cable twister twisting equipment
  • one proposed solution for reducing the friction involved designing a "wide-gauge" twister, removing the balloon guides, and running the twisting equipment at a speed less than about 5500 rp .
  • "wide-gauge" twister it is meant a twister frame having a distance of about 18 to 22 inches from the center of one yarn spindle to the next spindle in the same row.
  • a conventional solution for ply-twisting nylon yarns was developed. This process involves retaining the balloon guides, running the twisting equipment at a speed of at least about 6000 rpm, and applying sufficient lubricant (finish) to the supply yarns, so that the frictional problems are suppressed.
  • the nylon yarns are coated with greater than 1% finish by weight, applied in either a one-step or two-step process. In the two-step process, or split application method, the primary finish is typically applied at 0.1-0.25% by weight of fiber to aid the fiber manufacturing process, ,and the balance is applied later in the process to meet a carpet mill's twisting requirements. While this high amount of finish improves the twisting operation, it does not completely overcome the ' frictional problems.
  • nylon yarns having a high finish level would essentially rotate in a free air space on a cable twister having balloon limiters, with no contact or only minimal contact with the limiters. However, in such cases, the yarn could still break by shearing against the supply yarn bucket.
  • the present invention relates to a process for ply-twisting nylon carpet yarns.
  • the process involves feeding a creel nylon yarn having less than about 1% by weight of finish through a tensioning device and onto a storage disc rotating at a speed of at least about 6,000 rpm, whereby the yarn emerges from the disc and forms a balloon.
  • the creel nylon yarn is fed through a series of low-friction guide rollers.
  • a bucket nylon yarn having less .than about 1% by weight of finish is fed through a separate tensioning device to a guide, where the creel yarn exits from the balloon and wraps around the bucket yarn to form a ply-twisted yarn.
  • the path of the yarn in the balloon is directed in such a manner that the yarn does not come into physical contact with balloon limiters.
  • the balloon limiters may be removed from the cable twisting equipment.
  • the path of the yarn in the balloon is directed in such a manner that the yarn does not come into physical contact with any surface between the disc and guide.
  • the yarns may have less than about 0.25% by weight of finish.
  • the nylon yarns are coated with less than about 0.25% by weight of finish, and the speed of the storage disc is at least about 7,000 rpm.
  • the tension on. the creel yarn between the tensioning device and balloon is less than about 0.6 grams per denier.
  • Suitable nylon yarns include, for example, nylon 6,6 and nylon 6.
  • Figure 1 is a schematic view of a prior art device for ply-twisting yarns.
  • Figure 2 is a schematic view of a preferred device for carrying out the process of the present invention.
  • creel yarn (1) is taken from active creel package (2) through tensioner (4) which may be of any suitable type, through guide (5) and J tube (6) to storage disc (7) .
  • Storage disc (7) rotates around its vertical axis while yarn (1) enters disc (7) at point (8) , progresses upwardly along the axis, and then exits radially through hole (9) .
  • Yarn (1) then wraps up to several turns on the exterior periphery of disc (7), forming a reserve of yarn.
  • yarn (1) is flung off by centrifugal force to form balloon (10) which is confined within balloon limiter (11) .
  • bucket yarn (12) feeds from stationary package (13) , located in supply yarn bucket (26), through tensioner (14) (usually a disc tensioner) to guide (15) where creel yarn (1) in balloon (11) wraps around it.
  • tensioner (14) usually a disc tensioner
  • the resulting ply-twisted yarn (16) then goes around take-up roll (17) and its associated freely-rotating grooved guide roll (18) to guide (19) and is then wound on package (20) .
  • the speed of take-up xoll (17) determines the number of turns per inch of ply-twist which is produced.
  • the tensions of creel yarn (1) and bucket yarn (12) are preferably adjusted to be substantially the same to obtain a plied yarn product having balanced twist. Otherwise, the yarn under higher tension forms a straight "core" around which the low tension end wraps.
  • guide (5) and J-tube (6) of Figure 1 have been replaced by low-friction guide rollers (21) , (22) , and (23) (as needed) and balloon limiters (11) have been eliminated.
  • balloon (24) Without the restraint of balloon limiters (11) , balloon (24) extends farther outwardly, and its rotational motion is retarded only by air drag. The balloon does not come into physical contact with any surface which could cause dusting or broken filaments.
  • This improved method provides for reduction of friction in the creel yarn path and enables nylon yarns with low finish levels to be employed.
  • Nylon yarns having less than about 1% and preferably less than about 0.25% by weight of finish may be used. Most of the yarns used in this invention will have about 0.05 to about 0.3% by weight of total finish.
  • the twisting equipment may be run at speeds satisfactory for commercial applications, i.e., the storage disc may rotate at a speed equal to or greater than about 6,000 rpm.
  • changes of direction in the yarn path should be minimized.
  • a single disc tensioner in a straight line yarn path is preferable to a post-and-disc type in which the yarn bends around one or more posts. The latter type is shown at (14) , which is satisfactory for bucket yarn but less desirable for creel yarn.
  • multiple nylon yarns may be arranged on a multi-position "narrow-gauge" twister having no balloon limiters, but including baffles
  • the baffles are not designed to control the tension of the balloon yarn. Rather, the baffles are inserted as partitions to separate the twisting positions and yarn spindles from each other on a multi-position twister.
  • “narrow-gauge” twister it is meant a twister frame having a distance of about 14 to 18 inches from the center of one yarn spindle to the center of the next spindle in the same row.
  • the baffles and supply yarn bucket Preferably, the baffles and supply yarn bucket
  • Yarn tension was measured using a hand-held "Check-line” Tensiometer, Model DXA-SP, available from Electromatic Equipment Company, Inc., Cedarhurst, NY.
  • the tension on the creel yarn is measured after it exits the storage disc (7) , and if necessary, the creel yarn tensioner (4) is adjusted so that the goal tension level is obtained.
  • the tension on the bucket yarn is then measured after the tensioner (14) , which can be adjusted so the tension of the bucket yarn equals that of the creel yarn.
  • the amount of finish on the yarn was determined by extracting a known weight of yarn with a solvent such as tetrachloroethylene, and then analyzing the extract using an infrared spectrophotometer, and comparing the infrared absorbance of the extract to the absorbance of previously prepared standardized solutions that contain known amounts of finish in the solvent.
  • a solvent such as tetrachloroethylene
  • Example l 1410 denier Du Pont type 696AS BCF nylon carpet yarn was twisted in the same manner as described in Comparative Example A, except that the storage disc speed was raised to 7000 rpm with 1300 grams tension. After 1.5 hours, heavy dusting and broken filaments were observed, due to the yarn in the balloon striking the balloon limiters.
  • Example l 1410 denier Du Pont type 696AS BCF nylon carpet yarn was twisted in the same manner as described in Comparative Example A, except that the storage disc speed was raised to 7000 rpm with 1300 grams tension. After 1.5 hours, heavy dusting and broken filaments were observed, due to the yarn in the balloon striking the balloon limiters.
  • Example l 1410 denier Du Pont type 696AS BCF nylon carpet yarn was twisted in the same manner as described in Comparative Example A, except that the storage disc speed was raised to 7000 rpm with 1300 grams tension. After 1.5 hours, heavy dusting and broken filaments were observed, due to the yarn in the balloon striking the balloon limiters.
  • Example 3 1410 denier Du Pont type 696AS BCF nylon carpet yarn was twisted in the the same manner as described in Comparative Example C, except that the balloon limiters were removed and the twister was run at 6250 rpm for about 15 hours, without the yarn in the balloon touching any surface between the storage disc and guide. No dust or broken filaments were observed.
  • Example 3
  • Example 4 1410 denier Du Pont type 696AS BCF nylon carpet yarn was twisted in the the same manner as described in Example 2, except that the storage disc speed was increased to 8000 rpm and was run for over four hours at 1200 gms tension. No dust or broken filaments were observed.
  • Example 4
  • Example 5 1410 denier Du Pont type 696AS BCF nylon carpet yarn was placed in one-half of the positions of the Volkmann twisting machine described in Comparative Example C, and the balloon limiters were removed. The twister was run at 6250 rpm storage disc speed, without the yarn in the balloon touching any surface between the storage disc and guide. No dusting or broken filaments were observed.
  • Example 5 1410 denier Du Pont type 696AS BCF nylon carpet yarn was placed in one-half of the positions of the Volkmann twisting machine described in Comparative Example C, and the balloon limiters were removed. The twister was run at 6250 rpm storage disc speed, without the yarn in the balloon touching any surface between the storage disc and guide. No dusting or broken filaments were observed.
  • Example 5 1410 denier Du Pont type 696AS BCF nylon carpet yarn was placed in one-half of the positions of the Volkmann twisting machine described in Comparative Example C, and the balloon limiters were removed. The twister was run at 6250 rpm storage disc speed, without the yarn in the balloon touching any surface
  • 1410 denier Du Pont type 696AS BCF nylon carpet yarn was placed in one-half of the positions of the Volkmann twisting machine, as described in Example 4, and was twisted in the same manner, except that the storage disc speed was raised to 7000 rpm.
  • the yarn in the balloon did not touch any surface between the storage disc and guide, and no dusting or broken filaments were observed.
  • the wide-gauge Volkmann twister was modified by installing partitions (baffles) at the twisting positions to simulate a narrow-gauge Volkmann twister.
  • the baffles were set at 14.5 inches apart from each other and the balloon limiters were removed.
  • 1410 denier Du Pont type 696AS BCF nylon carpet yarn was then placed in the twisting positions and supply yarn bucket and was twisted at a storage disc speed of 6500 rpm.
  • the creel yarn in the balloon touched both baffles during runs over a two hour period, with some dusting but no broken filaments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

Cette invention concerne un procédé permettant d'effectuer la torsion retors de fils de nylon recouverts d'un léger apprêt. Dans ece procédé on contrôle la trajectoire du fil de ballon situé sur un métier à retordre pour câble.
PCT/US1992/010004 1991-11-26 1992-11-25 Procede permettant d'effectuer la torsion retors de fils sans utiliser de limiteurs de ballons WO1993011289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79834091A 1991-11-26 1991-11-26
US07/798,340 1991-11-26

Publications (1)

Publication Number Publication Date
WO1993011289A1 true WO1993011289A1 (fr) 1993-06-10

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PCT/US1992/010004 WO1993011289A1 (fr) 1991-11-26 1992-11-25 Procede permettant d'effectuer la torsion retors de fils sans utiliser de limiteurs de ballons

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AU (1) AU3179893A (fr)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009114408A3 (fr) * 2008-03-11 2009-12-10 Invista Technologies S.A R.L. Procédés de formation d’un fil et appareil pour tordre ou câbler un fil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5314462A (en) * 1992-05-27 1994-05-24 Cardiac Pacemakers, Inc. Positive fixation device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191656A (en) * 1978-10-05 1980-03-04 Allied Chemical Corporation Non-yellowing biocide for control of bacteria in spin finish emulsions used on nylon yarn
EP0165188A2 (fr) * 1984-06-05 1985-12-18 Verdol S.A. Procédé pour la réalisation de fils câbles de grande régularité et dispositif pour sa mise en oeuvre
EP0373655A2 (fr) * 1988-12-14 1990-06-20 E.I. du Pont de Nemours and Company Fibres pigmentées de nylon résistantes aux taches et leur procédé de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4191656A (en) * 1978-10-05 1980-03-04 Allied Chemical Corporation Non-yellowing biocide for control of bacteria in spin finish emulsions used on nylon yarn
EP0165188A2 (fr) * 1984-06-05 1985-12-18 Verdol S.A. Procédé pour la réalisation de fils câbles de grande régularité et dispositif pour sa mise en oeuvre
EP0373655A2 (fr) * 1988-12-14 1990-06-20 E.I. du Pont de Nemours and Company Fibres pigmentées de nylon résistantes aux taches et leur procédé de fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CANADIAN TEXTILE JOURNAL September 1984, pages 56 - 65 POLEJES J.D. 'Principles of Cable Twister Design and Operation' cited in the application *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009114408A3 (fr) * 2008-03-11 2009-12-10 Invista Technologies S.A R.L. Procédés de formation d’un fil et appareil pour tordre ou câbler un fil
US8347596B2 (en) 2008-03-11 2013-01-08 Invista North America S.A.R.L. Methods of forming yarn and apparatus for twisting or cabling yarn

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Publication number Publication date
AU3179893A (en) 1993-06-28

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