US3816993A - Friction twist tangling of yarns - Google Patents

Friction twist tangling of yarns Download PDF

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Publication number
US3816993A
US3816993A US00301394A US30139472A US3816993A US 3816993 A US3816993 A US 3816993A US 00301394 A US00301394 A US 00301394A US 30139472 A US30139472 A US 30139472A US 3816993 A US3816993 A US 3816993A
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United States
Prior art keywords
yarn
false
twist
yarn bundle
twisted
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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US00301394A
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English (en)
Inventor
Waters T Mc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Co
Original Assignee
Monsanto Co
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
Priority to US00301394A priority Critical patent/US3816993A/en
Application filed by Monsanto Co filed Critical Monsanto Co
Priority to FR7338212A priority patent/FR2204719B1/fr
Priority to DE19732353820 priority patent/DE2353820A1/de
Priority to JP48120056A priority patent/JPS4975853A/ja
Priority to IT30656/73A priority patent/IT999026B/it
Priority to BE137127A priority patent/BE806587A/xx
Priority to GB4991873A priority patent/GB1416759A/en
Priority to CA184,398A priority patent/CA989691A/en
Application granted granted Critical
Publication of US3816993A publication Critical patent/US3816993A/en
Anticipated expiration legal-status Critical
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
    • D02G1/02—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
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements

Definitions

  • Guyot U.S. Pat. No. 2,702,982
  • US. Pat. No. 3,404,525 discloses that a coherent compact yarn can be made without interlacing or inter mingling of the filaments by imparting to the yarn a low degree (between 0.25 and 2.5 turnsper inch) of twist liveliness or torque. This is disclosed as accomplished by applying false twist during the drawing operation so that the yarn is helically drawn, or by false twist heat setting of a previously drawn yarn. The resulting torque in the yarn decays with time during storage, and accordingly the coherency of the yarn decreases. By way of contrast, yarns wherein the filaments are intermingled do not lose their coherency upon storage.
  • a primary object of the invention is to provide a novel process for intermingling the filaments in a multifilament yarn.
  • a further object of the invention is to provide a process of the above character wherein the filaments are intermingled by being false-twisted in the absenceof heat-setting conditions.
  • a further object of the invention isto provide a process of the above character wherein the filamentsare intermingled by frictional contact with a surface moving transverse to the direction in which the yarn travels.
  • FIG. 1 is a box diagram.illustrating the.process
  • FIG. 2 is a perspective view of a first type. of mechanical interlacer
  • FlG. 3 is a sectional. viewttaken. alongthelinew3 -3.
  • yarn20- is.fed from a source 22 through mechanical interlacer 24x0 apparatus 26 for performingpfurther processing. such as winding the yarn on a package.
  • Source. 22ll preferably includesa drawing operation so. that yarn 20 has already beendrawn before being subjected to the present process.
  • mechanical interlacer 24 mechanically false twistsyarn 20by subjecting the yarn to frictional contact witha surface movingin a direction transverse to the direction of movement of the.
  • the false twisting device frictionally contacts theyarn with a surface movingin a direction transverse to the direction of movement of the yarn so as to roll theyarn about the yarn axis.
  • FIGS. 2-8 illustrate exemplary friction 'twisters of the preferred type wherein each revolution of thefalse twisting'device can insert several .tums twist in the yarn.
  • FIGS. 2and SQIS of the general type disclosed in US. Pat. No. 2,936,567 As illustrated, device 24 is an annular bushing driven to rotate.
  • FIG. 4 schematically shows aifalse twisting mechanism of the general type disclosed in US. Pat. No.
  • FIG. schematically illustrates that yarn 20 may be false twisted by frictional engagement with the periphery of a single rotating disc 28.
  • Suitable guides 32 are provided for locating the yarn.
  • the illustrated pigtail guides are merely exemplary.
  • a plurality of yarns may be processed simultaneously by a single false twisting device, as shown in FIG. 6.
  • device 24 includes belt 34 supported and driven by rolls 36. Yarns 20 frictionally engage the upper surface of belt 34, and are false twisted thereby.
  • FIGS. 2-6 are positively driven by separate non-illustrated means. However it is possible to provide a false twisting device which is driven by the yarn, as shown in FIGS. 7 and 8.
  • an idler (undriven) roll 38 having a curved flange 40 is located adjacent a separator roll 42.
  • the axes of rolls 38 and 42 are not parallel, so that adjacent wraps of yarn 20 are separated.
  • Yarn 20 is fed to roll 38 at an angle such that yarn 20 rolls against and is false twisted by flange 40 before touching the cylindrical portion of roll 38.
  • idler roll 44 is provided with a concave annular surface.
  • yarn 20 is red to roll 44 at an angle such that yarn 20 rolls against and is false twisted by the concave surface of roll 44.
  • the false twisting devices shown in FIGS. 7 and 8 can be positively driven if desired.
  • the process of the invention can be applied to any continuous filament yarn having at least three filaments, although useful results normally are obtained only with yarns of at least filaments.
  • the process is practicable at any speed at which the yarn can be forwarded. Yarn speeds between 10 and 5,000 yards per minute are presently practical. Speeds are limited by the capabilities for winding the yarn, and not by limitations in the present process.
  • the yarn not be appreciably drawn in the false twisted configuration, and that the yarn not be subjected to effective heat-setting conditions while in the false-twisted configuration. Avoidance of a troublesome amount of drawing is achieved by maintaining the tension on the false-twisted segment of the yarn between 0.01 and 1.0 grams per denier, and preferably between 0.08 and 0.5 grams per denier. The tension downstream of interlacer 24 will normally be somewhat higher than the tension in the false-twisted region.
  • the false twist device of FIG. 4 is used, the discs having diameters of about 2% inches and rotating at 10,000 rpm.
  • the filaments of the yarn are well-intermingled, giving a zerotwist yarn with coherency and handling properties equivalent to those of a yarn with one to two turns per inch twist.
  • the yarn has no discernable torque. Avoiding texturing or the setting of objectionable torque into the yarn can readily be achieved by one skilled in the art.
  • Residual torque is less than 0.25 turn per inch in yarns according to the invention, and preferably is substantially zero, the measurement being made four hours after the yarn is collected on the bobbin.
  • a one-yard sample of the yarn is unwound from the bobbin, the free end of the yarn being held to prevent it from twisting.
  • a small tab (one-half square inch) of cellophane tape is attached to the free end.
  • the yarn sample is held vertically with the free end in the lowermost position. The free end is then released, and the revolutions made by the free end in two minutes are counted.
  • the number of revolutions divided by 36 equals the turns per inch of residual torque.
  • the ambient temperature should be between 65 and F., and care must be taken that the yarn is not subjected to drafts or air currents which might influence free rotation of the free end of the yarn.
  • the present process is particularly useful in intermingling the filaments in yarns having more than three denier per filament.
  • a drawn nylon 66 yarn having a total denier of 200 and 34 filaments is forwarded at a speed of 3000 yards per minute and under a tension of 20 grams to a windup mechanism.
  • Various types of pneumatic intermingling devices and process conditions are employed in an effort to satisfactorily intermingle the filaments.
  • the shortest average distance attainable between filament tangles located by a pin or hook inserted into the bundle under the hookdrop test specified in US. Pat. No. 3,110,151 is too long for commercial acceptability by a factor of 3.
  • the pneumatic intermingling devices are then replaced with the FIG. 4 apparatus under the conditions specified in the preceeding paragraph.
  • the distance between tangles is now observed to be within the range of commercial acceptability. Similar results are obtained in a comparison of pneumatic tanglers with mechanical false twisters on polyethylene terephthalate yarn having total denier and 34 filaments
  • the transversely moving surface which frictionally engages the yarn for imparting false twist thereto should have a relatively high coefficient of friction with the yarn.
  • the surface should be made of a resilient rubbery material, such as an elastomeric polyurethane. However a harder surface such as steel or the like can be used in many cases.
  • the coefficient of friction, yarn speed and tension, and surface speed of the false twisting device should be chosen such that at least 5 and preferably or more turns per inch false twist be imparted to the yarn upstream of the false twist device.
  • the twist level is determined by trapping a sample length of the running yarn, counting the number of turns in the sample, and dividing the number of turns by the length in inches of the untwisted yarn sample. The twist level and tension are such that the yarn does not twist double.
  • a process for interlacing the filaments in a multifilament yarn bundle comprising in combination:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00301394A 1972-10-27 1972-10-27 Friction twist tangling of yarns Expired - Lifetime US3816993A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00301394A US3816993A (en) 1972-10-27 1972-10-27 Friction twist tangling of yarns
DE19732353820 DE2353820A1 (de) 1972-10-27 1973-10-26 Garnwirren durch reibungszwirnen
JP48120056A JPS4975853A (it) 1972-10-27 1973-10-26
IT30656/73A IT999026B (it) 1972-10-27 1973-10-26 Procedimento di filatura ad attrito
FR7338212A FR2204719B1 (it) 1972-10-27 1973-10-26
BE137127A BE806587A (fr) 1972-10-27 1973-10-26 Procede pour entremeler des fils par torsion par frottement
GB4991873A GB1416759A (en) 1972-10-27 1973-10-26 Treatment of yarns
CA184,398A CA989691A (en) 1972-10-27 1973-10-26 Friction twist tangling of yarns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00301394A US3816993A (en) 1972-10-27 1972-10-27 Friction twist tangling of yarns

Publications (1)

Publication Number Publication Date
US3816993A true US3816993A (en) 1974-06-18

Family

ID=23163152

Family Applications (1)

Application Number Title Priority Date Filing Date
US00301394A Expired - Lifetime US3816993A (en) 1972-10-27 1972-10-27 Friction twist tangling of yarns

Country Status (8)

Country Link
US (1) US3816993A (it)
JP (1) JPS4975853A (it)
BE (1) BE806587A (it)
CA (1) CA989691A (it)
DE (1) DE2353820A1 (it)
FR (1) FR2204719B1 (it)
GB (1) GB1416759A (it)
IT (1) IT999026B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478037A (en) * 1982-07-16 1984-10-23 Stanley Backer Twisting method and apparatus
US20060090368A1 (en) * 2003-03-31 2006-05-04 Kaneka Corporation Manufacturing method and continuous drying apparatus for head decorating regenerated collagen fiber

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2443238C3 (de) * 1974-09-10 1987-07-09 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Reibrotor zum Friktionsfalschdrallen von synthetischen Fäden
JPS5516888A (en) * 1978-04-06 1980-02-05 Du Pont Canada Method of and apparatus for winding bulked yarn

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908133A (en) * 1956-08-09 1959-10-13 Clemson Agricultural College O False twister
US3043084A (en) * 1961-09-14 1962-07-10 Eastman Kodak Co False twisting apparatus for tow
US3228181A (en) * 1963-03-22 1966-01-11 British Nylon Spinners Ltd Production of yarns with varying twist
US3296786A (en) * 1964-11-06 1967-01-10 Turbo Machine Co Apparatus for processing a twisted bulky yarn

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH426090A (de) * 1964-02-26 1966-12-15 Hoechst Ag Verfahren zur Herstellung gekräuselter Fäden
GB1135486A (en) * 1966-01-13 1968-12-04 Ici Ltd Improvements in or relating to the production of compact multifilament yarns
JPS5035144A (it) * 1973-08-02 1975-04-03

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908133A (en) * 1956-08-09 1959-10-13 Clemson Agricultural College O False twister
US3043084A (en) * 1961-09-14 1962-07-10 Eastman Kodak Co False twisting apparatus for tow
US3228181A (en) * 1963-03-22 1966-01-11 British Nylon Spinners Ltd Production of yarns with varying twist
US3296786A (en) * 1964-11-06 1967-01-10 Turbo Machine Co Apparatus for processing a twisted bulky yarn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478037A (en) * 1982-07-16 1984-10-23 Stanley Backer Twisting method and apparatus
US20060090368A1 (en) * 2003-03-31 2006-05-04 Kaneka Corporation Manufacturing method and continuous drying apparatus for head decorating regenerated collagen fiber
US7337555B2 (en) * 2003-03-31 2008-03-04 Kaneka Corporation Manufacturing method and continuous drying apparatus for head decorating regenerated collagen fiber

Also Published As

Publication number Publication date
JPS4975853A (it) 1974-07-22
GB1416759A (en) 1975-12-03
FR2204719B1 (it) 1977-08-12
IT999026B (it) 1976-02-20
BE806587A (fr) 1974-04-26
DE2353820A1 (de) 1974-05-09
FR2204719A1 (it) 1974-05-24
CA989691A (en) 1976-05-25

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