US3797220A - Method for the texturization of yarns, and the product thereof - Google Patents

Method for the texturization of yarns, and the product thereof Download PDF

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Publication number
US3797220A
US3797220A US00124797A US3797220DA US3797220A US 3797220 A US3797220 A US 3797220A US 00124797 A US00124797 A US 00124797A US 3797220D A US3797220D A US 3797220DA US 3797220 A US3797220 A US 3797220A
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United States
Prior art keywords
yarn
false
twist
annular
mms
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Expired - Lifetime
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US00124797A
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English (en)
Inventor
G Faraci
G Godi
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Bemberg SpA
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Bemberg SpA
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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
    • D02G1/0233—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 real twist being imparted to the yarn before or after false-twisting

Definitions

  • This invention relates to a method for the production of a texturized yarn, in which a sliding yarn, while it forms a balloon, is wound around a spindle with the aid of a vertically ring and traveler which surrounds said spindle, in which method the yarn is heated and, as it enters the balloon it rotates about its own longitudinal axis and slides against an annular false-twisting body, so as to impart to the yarn a twist angle.
  • the invention also comprises a device for performing the method and the yarn obtained thereby.
  • the false-twist annular body is also a heating means, so that it is difficult to select an appropriate material for the interior surface of the annular false twist body, that is, the material on which the yarn is allowed to slide in the most regular possible manner. As a matter of fact, a regular sliding of the yarn against said surface is necessary in order that a uniform yarn, having a sufficient degree of false twist, or texturization, may be obtained. Furthermore, in the known method, the annular false-twist body is positioned above the rotating spindle at a rather long distance therefrom.
  • An object of the invention is to provide a method of the kind referred to above, which is not impaired by the defects enumerated hereinabove.
  • the method according to the invention is characterized in that the surface of the annular false-twist body is made of rubber or another material which has similar frictional properties.
  • the inside diameter of the annular false-twist body varies between mms. greater than and30 mms. less than the outside diameter of the tube on which the treated yarn is wound, whereas the distance between the lower portion of the annular false-twist body and the upper portion of the tube is between 1 and 10 mms.
  • the balloon tension of the yarn is kept virtually constant. This can be obtained by varying the spindle speed according to a preselected program.
  • the yarn is heated upstream of the annular false-twist body, for example by a heated pin, a heated plate or a heated roller, which have a temperature lying in the range from C and 60C below the melting point of the thread, for example in the case of a polyamide yarn.
  • the method is advantageously performed if the yarn is drawn upstream of the annular false-twist body, the latter being preferably made of a rubber having a hardness of at least 70 Shore.
  • a device for performing the method according to the invention comprises yarn feeding means, yarn forwarding means, a ring spindle on which a tube for winding the yarn is inserted, an annular false-twist body placed above said ring spindle, and means for heating the yarn, and is characterized in that the surface of the annular false-twist body over which the yarn slides is of rubber, which more particularly has a hardness of at least 70 Shore, or is of a different material having similar frictional properties.
  • a yarn-heating means is providedupstream of the annular false-twist body.
  • a non texturized starting yarn 1, which is not drawn, is unthreaded from a spool 2 through a yarn guide 3 placed in front of the spool.
  • the yarn is guided by a guiding roller 4 towards a driven feed roller 5 coupled with a pressure roller 6.
  • the yarn is drawn by a driven drawing roller 7 with the aid of a separator roller 8, the surface speed of the drawing roller being adjusted so as to be a few times a multiple of that of the feed roller.
  • the drawn yarn passes over a hot pin 9 and enters the annular false-twist body 10 whose internal surface is of a rubber having a hardness of at least 70 Shore, the body 10 having a height of mms., and inside diameter of 28 mms., and an outside diameter of 48 mms.
  • the yarn slides against the surface of the inner circumference of the false-twist body 10, which is arranged above the tube 11, about which the yarn is wound, at a distance ranging from 1 to 10 mms.
  • the diameter of the tube 11 is 50 mms.
  • the tube 11 is inserted into a driven twisting spindle 12.
  • the yarn On the tube 11 the yarn is wound in the form of a pack 13 by means of a vertically reciprocable ring and traveler system 14 which causes the yarn to rotate and to build a balloon 15 between the ring 14 and the annular false-twist body 10.
  • the annular false-twist body is not rotated.
  • a very high degree of false-twist can be imparted to the yarn, inasmuch as the diameter of the yarn is much smaller than the inside diameter of the annular false- !twistbody over which the yarn if forced to slide.
  • hank and, after one minute the total length (L taken by the hank is read on a dial placed behind the hank.
  • the weight is removed and the shank is transferred during 45 minutes into an oven with air heated to C, whereafter the hank is removed from the oven and placed to be conditioned during 60 minutes in an atmosphere as conditioned to 22C and percent rel. humidity.
  • the hank is hung again to the hook and a weight of 0.002 grams/dtex is hung to the hank and the length (L taken by the hank is read after one minute.
  • Shrinkage is calculated with the formula r n 15f L .-1Q-.-. f 3
  • sensitivity to twist it is intended herein to connote a measure taken according to the following method.
  • a section of horizontal yarn is affixed at its two ends to two clamps, so as to have a yarn length comprised between the two clamps of 50 cms. and a tension of the yarn equal to the weight of 1,000 meters of the yarn.
  • a 2-gram weight is hung at the middle of the horizontal yarn length and the two clamps, which can slide on a horizontal plane, are approached until they contact one another.
  • the yarn forms a loop which is twisted over itself a certain number of times, inasmuch as the yarn has a twisting moment.
  • a revolution counter indicates how many revolutions are required to untwist the loop. This value, as referred to the SO-cms. length of yarn expresses just the sensitivity to twist.
  • a method for the production of texturized yarn in which a sliding yarn is wound, as it builds up a ballon, on a spindle with the aid of a vertically reciprocable ring and traveler which surrounds said spindle, in which method the yarn is heated and as the heated yarn enters the balloon it is rotated about its longitudinal axis by sliding over the inner surface of a false-twist annular body, so as to impart a twist angle to the yarn, characterized in that the distance between the lower portion of the annular false-twist body and the upper portion of the tube on which the yarn is being wound lies between 1 and 10 mms, and the inside diameter of the falsetwise annular body varies between 10 mms. greater than and 30 mms less than the outside diameter of the tube on which the yarn is being wound.
  • annular falsetwist body engages the yarn with a frictional surface formed of rubber-like material, having a hardness of at least Shore.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00124797A 1970-03-18 1971-03-16 Method for the texturization of yarns, and the product thereof Expired - Lifetime US3797220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2213770 1970-03-18

Publications (1)

Publication Number Publication Date
US3797220A true US3797220A (en) 1974-03-19

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US00124797A Expired - Lifetime US3797220A (en) 1970-03-18 1971-03-16 Method for the texturization of yarns, and the product thereof

Country Status (4)

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US (1) US3797220A (enrdf_load_stackoverflow)
FR (1) FR2084169A5 (enrdf_load_stackoverflow)
GB (1) GB1324905A (enrdf_load_stackoverflow)
NL (1) NL7007250A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023257A3 (en) * 1999-09-30 2002-05-10 Advanced Glassfiber Yarns Llc Method and apparatus for winding yarn on a bobbin
US20210189606A1 (en) * 2016-12-19 2021-06-24 Lintec Of America, Inc. Nanofiber yarn spinning system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1205706B (it) * 1987-01-16 1989-03-31 Ratti Spa Michele Procedimento per l'ottenimento di filati per la fabbricazione di tessuti di tipo crepon mediante l'impiego di fili sintetici

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018609A (en) * 1957-07-26 1962-01-30 Bayer Ag Process for the hot stretching of yarns of synthetic materials
US3029591A (en) * 1956-08-23 1962-04-17 Sydney & E Scragg Ltd Twisting of textile yarns
US3069837A (en) * 1959-06-30 1962-12-25 Du Pont Twisting process
US3093955A (en) * 1958-06-28 1963-06-18 Bemberg Spa Device for the twisting and heat setting of threads or yarns of synthetic material, constituted preferably of numerous elementary filaments or fibers
US3376698A (en) * 1965-08-02 1968-04-09 Tmm Research Ltd Production of stretch or bulked textile yarns
US3474612A (en) * 1967-08-10 1969-10-28 British Nylon Spinners Ltd Drawing and bulking of synthetic polymer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029591A (en) * 1956-08-23 1962-04-17 Sydney & E Scragg Ltd Twisting of textile yarns
US3018609A (en) * 1957-07-26 1962-01-30 Bayer Ag Process for the hot stretching of yarns of synthetic materials
US3093955A (en) * 1958-06-28 1963-06-18 Bemberg Spa Device for the twisting and heat setting of threads or yarns of synthetic material, constituted preferably of numerous elementary filaments or fibers
US3069837A (en) * 1959-06-30 1962-12-25 Du Pont Twisting process
US3376698A (en) * 1965-08-02 1968-04-09 Tmm Research Ltd Production of stretch or bulked textile yarns
US3474612A (en) * 1967-08-10 1969-10-28 British Nylon Spinners Ltd Drawing and bulking of synthetic polymer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001023257A3 (en) * 1999-09-30 2002-05-10 Advanced Glassfiber Yarns Llc Method and apparatus for winding yarn on a bobbin
US20210189606A1 (en) * 2016-12-19 2021-06-24 Lintec Of America, Inc. Nanofiber yarn spinning system
US11913142B2 (en) * 2016-12-19 2024-02-27 Lintec Of America, Inc. Nanofiber yarn spinning system

Also Published As

Publication number Publication date
FR2084169A5 (enrdf_load_stackoverflow) 1971-12-17
NL7007250A (enrdf_load_stackoverflow) 1971-09-21
GB1324905A (en) 1973-07-25

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