US3431716A - Process for producing a crimped multifilament yarn - Google Patents

Process for producing a crimped multifilament yarn Download PDF

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Publication number
US3431716A
US3431716A US490360A US3431716DA US3431716A US 3431716 A US3431716 A US 3431716A US 490360 A US490360 A US 490360A US 3431716D A US3431716D A US 3431716DA US 3431716 A US3431716 A US 3431716A
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United States
Prior art keywords
yarn
roller
zone
stabilization
temperature
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Expired - Lifetime
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US490360A
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English (en)
Inventor
Johan J Mertens
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.)
Akzona Inc
Original Assignee
American Enka Corp
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Filing date
Publication date
Application filed by American Enka Corp filed Critical American Enka Corp
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Publication of US3431716A publication Critical patent/US3431716A/en
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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
    • D02G1/0206—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

Definitions

  • the invention is directed to a continuous treatment process wherein yarn is successively heat-set while temporarily in a state of high twist, allowed to relax and then passed to a stabilization zone while in the twisted state, with the temperature of the stabilization zone increasing linearly from the point of the yarns entry into the zone and to the point of yarn exit from the zone.
  • the present invention is directed to an improved process and apparatus for manufacturing a multifilament yarn having a low elasticity and an attractive and uniform crimp. More particularly, the invention relates to a continuous treatment process whereby the yarn is successively heat-set while temporarily in a state of high twist, allowed to relax, stabilized while in a crimped state, and finally wound.
  • stabilization of the crimped yarn merely implies heating the yarn to a predetermined final temperature.
  • This stabilization treatment is carried out by guiding yarn in a relaxed state over a plate or roller heated at a constant temperature.
  • the crimped yarns obtained by such processes have properties that are different from those of the generally known elastic yarns obtained by the false twisting process.
  • the heatsetting treatment of the yarn in a state of high twist is not followed by an additional heat treatment, and the resulting yarns, therefore, not only possess crimp but also a high elasticity.
  • the yarns to which the invention relates have an attractive crimp, but a low elasticity.
  • the heat gradually penetrates toward the center of the yarn and causes the stiffness of the component yarn filaments to vary from point to point.
  • This variation causes the internal stresses in the filaments to also vary and such latter variation will often cause the crimped yarn to assume a Shape in which the potential energy of the yarn is at all points at a minimum. This shape is often not in accordance with that of the ideal crimp.
  • an apparatus which comprises a yarn supply system which feeds the yarn successively into a heat-setting apparatus, a false twisting member, a relaxation system and a stabilization apparatus.
  • the last mentioned apparatus comprises a rotatable roller with a heating system therein for imparting to the roller a temperature which increases in the axial direction thereof.
  • the roller contains a number of circumferential grooves over which the yarn passes, and these grooves are heated at increased temperatures axially of the roller in order to insure that the yarn is heated over a predetermined temperature gradient throughout the stabilization process.
  • the invention includes the crimped yarns manufactured by the above described process and using the above described apparatus.
  • This yarn feed system consists of a known system of driven rollers and pressure rollers between which the yarn 2 is passed.
  • a similarly constructed yarn delivery system is indicated by the reference numeral 5.
  • the yarn is passed through a heating tube 7 to a false twisting member 6.
  • the yarn is passed through the delivery system 5 to a roller 8 having a number of circumferential grooves thereon.
  • the turns of the yarn 2 in the grooves of the roller 8 are kept separated by means of an idler 9, the idler 9 and roller 8 being slightly out of parallel in two separate planes to insure that the turns of yarn are kept separated. After the yarn has left the roller 8, it is collected on a package 10.
  • the package 10 which is mounted on a spindle, is freely rotatable and driven at a constant speed by a roller 11. While the yarn is being collected on the package 10, it is caused to traverse as schematically indicated by the arrows.
  • the temporary high twist which is inserted into the length of yarn between the yarn feed system 4 and the false twisting member 6 by said false twisting member 6 is set in the heating tube 7.
  • the yarn leaves the delivery system 5, it is highly elastic as a result of this heat-set and will develop crimp upon contraction.
  • the roller 8 and the idler 9 are driven at a peripheral speed which is considerably lower than that of the yarn delivery system 5. This makes it possible for the yarn to crimp before it runs onto the roller 8.
  • the crimped yarn is stabilized on the roller 8 and to this end roller 8 is heated by electrical heating members (not shown) which are mounted in the interior of the roller.
  • the roller 8 is heated so that the temperature from left to right increases about 80 C., and the speed at which the yarn is taken up by the package 10 is substantially equal to the speed at which it is passed over the roller 8.
  • the yarn stabilization temperature and yarn speed may be varied.
  • the temperature of the yarn be increased linearly and that the yarn speed remain constant during its passage through the stabilization zone,
  • the temporary high twist may set to a degree which is just high enough to allow the yarn to fully develop its crimp just before it enters the stabilization zone, but still sufliciently high to permit complete reorientation of the molecules during the stabilization phase.
  • the yarn when the yarn is about to be wound on a tube it will be substantially free from internal stresses.
  • Controlling the yarn speed during stabilization may be done in several ways.
  • the stabilization zone may be divided into a number of short zones which are separated from each other by pairs of driven nip rollers.
  • a constant yarn speed is to be preferred during stabilization and the yarn 5 is passed at a constant speed in the plurality of turns around the grooved roller 8 as shown.
  • the diameter of the roller 8 may be changed in an axial direction, resulting in a cone or cone-frustum shaped roller. As a result of such change the speed of the yarn may be changed as it passes axially down the roller. It has been found, however, that by using a simple cylindrical grooved roller, a satisfactory crimp shape may be obtained if the temperature of the roller increases axially in a linear fashion. If, for example, the present process is applied to a polyamide yarn, then a stabilization temperature should increase linearly from approximately 100 C. to 180 C.
  • EXAMPLE I A melt-spun polyethylene terephthalate yarn composed of 96 filaments and having a denier of 150 was guided through the false-twisting zone at a speed of 70 meters/ minute. A false twisting spindle of the belt-driven type was used and operated at a speed of 140,000 rpm. The heating tube 7 was heated to 160 C.
  • the roller 8 was 20 cm. in diameter and 20 cm. in length and was provided with 12 grooves.
  • the circumferential speed of the roller was set at 50 meters/minute and the roller temperature was approximately 100 C. at the point of arrival of the yarn and approximately 180 C. at the point of yarn leaving.
  • the yarn was wound onto the package at a speed which was substantially equal to the speed at which it was passed around the roller 8.
  • the yarn obtained possessed great uniformity, an attrac-
  • the false-twisting member used in this case consisted of two facing, flat discs rotating in opposite directions. The discs were mounted at a small angle relative to each other and their axes were displaced relative to each other in a radial direction. When the yarn was passed between the discs it was simultaneously forwarded and false twisted.
  • the yarn used was one having a basis of polyaminocaproic acid; it was composed of 63 filaments and had a denier of 1140. This yarn was passed through the false-twisting zone at a speed of 20 meters/minute and was given a false twist of 950 turns per meter.
  • the temperature of the heat-setting apparatus was approximately C., and the roller 8 was driven at a peripheral speed of 150 meters/minute. From the point of arrival of the yarn on roller 8 to the point of leaving, the temperature of the roller increased from 100 C. to C.
  • the yarn was guided around the roller 8 in 15 turns and the yarn thus obtained was very suitable for the use in the manufacture of carpets.
  • a process for manufacturing yarn having an attractive and uniform crimp while exhibiting a low elasticity comprising the successive steps of (a) heat-setting said yarn while temporarily in a state of high twist,
  • Apparatus for manufacturing a crimped yarn having a low elasticity and an attractive and uniform crimp comprising (a) yarn supply means,
  • said heating means includes (a) a roller having circumferential grooves therein over which said yarn may be passed and heated, said said roller to an adjacent groove in said roller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US490360A 1964-10-16 1965-09-27 Process for producing a crimped multifilament yarn Expired - Lifetime US3431716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6412050A NL6412050A (en)) 1964-10-16 1964-10-16

Publications (1)

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US3431716A true US3431716A (en) 1969-03-11

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Application Number Title Priority Date Filing Date
US490360A Expired - Lifetime US3431716A (en) 1964-10-16 1965-09-27 Process for producing a crimped multifilament yarn

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US (1) US3431716A (en))
BE (1) BE670544A (en))
DE (1) DE1710640A1 (en))
ES (1) ES318558A1 (en))
GB (1) GB1122375A (en))
NL (1) NL6412050A (en))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698178A (en) * 1969-08-27 1972-10-17 Toray Industries Method of manufacturing textured yarn having trasverse deformities
FR2831190A1 (fr) * 2001-10-19 2003-04-25 Rieter Icbt Dispositif pour delivrer un fil, notamment dans une machine d'etirage-texturation
US20040216278A1 (en) * 2003-04-24 2004-11-04 Pierluigi Marrani Process and apparatus for the transformation of yarns and a yarn thus produced
US20120144633A1 (en) * 2010-12-13 2012-06-14 Oerlikon Textile Gmbh & Co. Kg Godet unit
CN105364627A (zh) * 2015-12-09 2016-03-02 无锡市世达精密焊管制造有限公司 钢管焊缝切削屑缠绕引导杆装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE635055A (en)) *
GB850693A (en) * 1957-07-11 1960-10-05 Ernest Soragg & Sons Ltd Improvements in and relating to the treatment of synthetic yarns and threads
US2958921A (en) * 1954-11-26 1960-11-08 Klinger Mfg Company Heat treatment of thermoplastic or thermosetting yarn
US3041813A (en) * 1959-07-09 1962-07-03 Heberlein Patent Corp Method and apparatus for producing crimped synthetic yarn
GB920319A (en) * 1960-09-06 1963-03-06 Monsanto Chemicals Apparatus and method for texturizing or bulking a compound yarn
US3165881A (en) * 1960-02-03 1965-01-19 Moncuit Yves De Production of high bulk yarns
US3270492A (en) * 1961-08-23 1966-09-06 Hosiery And Allied Trade Res A Production of yarns
US3289400A (en) * 1964-09-21 1966-12-06 Ernest Scragg & Sons Holdings Apparatus for producing modified twist crimped yarn
US3313011A (en) * 1963-10-14 1967-04-11 Celanese Corp Method of texturing triacetate yarn
US3316705A (en) * 1958-05-13 1967-05-02 Scragg & Sons Production of artificial yarns

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE635055A (en)) *
US2958921A (en) * 1954-11-26 1960-11-08 Klinger Mfg Company Heat treatment of thermoplastic or thermosetting yarn
GB850693A (en) * 1957-07-11 1960-10-05 Ernest Soragg & Sons Ltd Improvements in and relating to the treatment of synthetic yarns and threads
US3316705A (en) * 1958-05-13 1967-05-02 Scragg & Sons Production of artificial yarns
US3041813A (en) * 1959-07-09 1962-07-03 Heberlein Patent Corp Method and apparatus for producing crimped synthetic yarn
US3165881A (en) * 1960-02-03 1965-01-19 Moncuit Yves De Production of high bulk yarns
GB920319A (en) * 1960-09-06 1963-03-06 Monsanto Chemicals Apparatus and method for texturizing or bulking a compound yarn
US3270492A (en) * 1961-08-23 1966-09-06 Hosiery And Allied Trade Res A Production of yarns
US3313011A (en) * 1963-10-14 1967-04-11 Celanese Corp Method of texturing triacetate yarn
US3289400A (en) * 1964-09-21 1966-12-06 Ernest Scragg & Sons Holdings Apparatus for producing modified twist crimped yarn

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698178A (en) * 1969-08-27 1972-10-17 Toray Industries Method of manufacturing textured yarn having trasverse deformities
FR2831190A1 (fr) * 2001-10-19 2003-04-25 Rieter Icbt Dispositif pour delivrer un fil, notamment dans une machine d'etirage-texturation
WO2003033792A3 (fr) * 2001-10-19 2003-10-16 Rieter Icbt Dispositif pour delivrer un fil, notamment dans une machine d'etirage-texturation
US20040216278A1 (en) * 2003-04-24 2004-11-04 Pierluigi Marrani Process and apparatus for the transformation of yarns and a yarn thus produced
US7013542B2 (en) * 2003-04-24 2006-03-21 Unitech Textile Machinery S.P.A. Process and apparatus for the transformation of yarns and a yarn thus produced
US20120144633A1 (en) * 2010-12-13 2012-06-14 Oerlikon Textile Gmbh & Co. Kg Godet unit
US8904608B2 (en) * 2010-12-13 2014-12-09 Oerlikon Textile Gmbh & Co., Kg Godet unit
CN105364627A (zh) * 2015-12-09 2016-03-02 无锡市世达精密焊管制造有限公司 钢管焊缝切削屑缠绕引导杆装置
CN105364627B (zh) * 2015-12-09 2018-01-05 无锡市世达精密焊管制造有限公司 钢管焊缝切削屑缠绕引导杆装置

Also Published As

Publication number Publication date
NL6412050A (en)) 1966-04-18
DE1710640A1 (de) 1970-07-16
BE670544A (en)) 1966-01-31
ES318558A1 (es) 1965-12-16
GB1122375A (en) 1968-08-07

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