US3098348A - Process for the manufacture of stable single-thread twist-compensated yarns - Google Patents

Process for the manufacture of stable single-thread twist-compensated yarns Download PDF

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Publication number
US3098348A
US3098348A US79014A US7901460A US3098348A US 3098348 A US3098348 A US 3098348A US 79014 A US79014 A US 79014A US 7901460 A US7901460 A US 7901460A US 3098348 A US3098348 A US 3098348A
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United States
Prior art keywords
thread
twisting
yarn
twist
turns
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Expired - Lifetime
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US79014A
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English (en)
Inventor
Hans Bryner
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Setar AG
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Setar AG
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Publication date
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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
    • D02G1/0226—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 multiple false-twisting
    • 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

Definitions

  • a manner of treating a single filament or thread to produce a stable twist-compensated yarn has devised a manner of treating a single filament or thread to produce a stable twist-compensated yarn.
  • a single thread is twisted either in a left or right hand direction and thereafter it is immediately fixed.
  • the yarn is successively twisted in an opposite direction or opened in order to give the thread a zero or beyond zero twisting.
  • the thread is then advantageously released so that it relaxes or expands and this may be accomplished by putting the threads on hanks so that it can expand freely.
  • the thread in a fully relaxed or expanded condition is fixed again at a temperature of about 30 C. or higher than the first fixing temperature treatment.
  • another twisting operation is performed to cancel nearly all of the turns so that the resultant yarn is stable and the thread does not tend to turn upon itself.
  • a further object of the invention is to provide an improved method of treating single-thread yarn to introduce both elastic stretch properties and stability against kinking and similar deformation.
  • a further object of the invention is to provide a method for manufacturing yarn of the character described which is simple in respect to the apparatus and processing steps employed and inexpensive to carry out.
  • FIG. 1 In the only FIGURE of the drawings there is indicated schematically the process of treating a plurality of single threads with the various thread positions indicated schematically for the various steps as listed.
  • the left part indicates a known process where bar designation B indicates the disposition of a plurality of threads treated in accordance with the steps indicated at the location designated C.
  • the graphical bar indication A is similar to the bar indication B but indicates a different direction of twist, a Z twist indicated on the bar B and an S twist indicated on the bar A.
  • the upper portion of each bar B and A indicates the single threads before they are twisted and the lower portion of the graph indicates the yarn appearance after the treatment both in a test state as indicated in the upper portion at the lower end of a free state as indicated in the lower portion of the lower end.
  • a bar E indicates the progressive dispositions of the yarns when subject to the method indicated at F. In the latter case the relaxing step '3 has not been included and the resultant fibers are indicated at the lower portion thereof.
  • the first step of the preferred process of this invention includes twisting a single thread in either a left or a right hand direction around its own longitudinal axis, to impart a first predetermined number of correspondingly directed turns per unit length.
  • the second step of the invention includes immediate treatment of the single twisted strand of the first step, whereby the twist is fixed by heat, such as by saturated steam at a first predetermined temperature.
  • the third step of the process thread is twisted in a sense of direction opposite to that used in the first step by a greater number of successive turns than the first twisting.
  • the yarn is thereby opened and a beyond zero twist is imparted.
  • the thread which has been elasticized and compressed by the twisting operations may advantageously be released, such as by being formed into hanks. This allows the thread to relax freely and to expand so that it is no longer under external stress.
  • the fifth step of the method includes a second fixation of the thread by treatment at a temperature at least 30 C. higher than that of the second step of the method.
  • the yarn is twisted again in the first direction about the same number of turns as the third step twisting exceeding the initial twisting. After this final twisting the yarn has been twisted an equal amount in each direction and the compensation results in stress relief.
  • Example A synthetic thread such as nylon, specifically nylon 6, sold under the trade name Perlon, of thirty denier and having parallel fibers, is selected.
  • the thread is subjected to a large number of twists per meter, for example about 3000 turns per meter, in left hand directions.
  • deformation imparted to the thread by twisting is then fixed by treatment with saturated steam at 100 C. Thereafter the thread is twisted about 3400 to 3800 turns or more per meter in a right hand or opposite direction. The thread is thus 400 to 80-0 or more turns per meter beyond zero in a right hand direction. The latter excess twist imparts the desired normal stretch capacity to the thread.
  • the yarn is next released advantageously completely and thereafter wound into hanks. This permits it to expand freely and to relax into an unstressed extended condition.
  • the stress of twisting a thread shortens it and when it is wound into hanks and allowed to expand freely to a stretched out state the stress is relieved.
  • the thread is treated with saturated steam at 130 C. in order to fix it. It should be noted that this treatment is effected at a temperature 30 C. higher than the initial fixing after the first twisting operation.
  • the yarn is twisted again in the left hand direction of the first twisting to compensate the excess twisting of 400 to 800 or more turns per meter imparted by the second twisting and the yarn is thus brought to a condition of zero twist.
  • Treatment according to the method of this invention produces a single-thread stretch yarn which is completely stable in the sense that it is free from a tendency to kink, twist or curl. Stability is achieved by relieving the tension in the thread imparted by a first twisting, through successive opposite twistings and steam treatments. The right hand twist equals the left hand twist and the opposite tensions cancel one another.
  • the second twisting imparts an excess of turns over the first twisting and this gives a stretch capacity.
  • the overtwisted yarn is then preferably allowed to expand freely and a second fixing is carried out while the yarn is in a relaxed state at a temperature at least 30 greater than that used for the first treatment.
  • a new stable singlethread elastic yarn may be used for the production of thin woven or knitted fabrics. Because it is a single strand yarn, it is finer than the conventional double strand stretch or elastic yarns and the fabrics made from it do not tend to turn or roll. Another advantage of this invention is found in the reduced cost of yarn manufacture.
  • a method of producing a stable elasticized yarn from a single thread of synthetic fibers which comprises, in combination, the steps of twisting said thread about its longitudinal axis in a first direction to impart to said thread a first predetermined number of correspondingly directed turns per unit length, treating said twisted thread with saturated steam at a predetermined temperature to fix and stabilize said thread, thereafter twisting said thread in a second direction which is opposite to said first direction and to an extent which is greater than said twisting in said first direction to impart to said thread a second predetermined number of turns per unit length which is greater than and directed oppositely to said first number of turns, allowing said thread to expand freely, thereafter treating said thread a second time with saturated steam at a predetermined temperature higher than said first temperature, whereby said thread is fixed and stabilized, and finally, after said fixing and stabilizing, twisting said thread a second time in said first direction a number of turns about equal to the excess of said sec ond number of turns over said first number of turns whereby said thread becomes a stable stretch yarn substantially free from kinking.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US79014A 1954-05-20 1960-12-28 Process for the manufacture of stable single-thread twist-compensated yarns Expired - Lifetime US3098348A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH190841X 1954-05-20

Publications (1)

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US3098348A true US3098348A (en) 1963-07-23

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US79014A Expired - Lifetime US3098348A (en) 1954-05-20 1960-12-28 Process for the manufacture of stable single-thread twist-compensated yarns

Country Status (4)

Country Link
US (1) US3098348A (de)
AT (1) AT190841B (de)
FR (1) FR1124865A (de)
GB (1) GB776898A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284996A (en) * 1961-07-07 1966-11-15 Fujii Hanjiro Method of producing crimped yarn
US3364542A (en) * 1966-02-28 1968-01-23 Wiscassett Mills Co Method of forming ladies' stretchable seamless stockings
US3703075A (en) * 1970-02-07 1972-11-21 English Sewing Ltd Method of making a yarn containing loops
US3855775A (en) * 1970-10-29 1974-12-24 Inter Textiles Europ Process for producing ply yarn from threads of fibers
US3879928A (en) * 1973-11-01 1975-04-29 Perfect Thread Company Inc Process for the manufacture of yarn and the resulting product

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3136112A (en) * 1962-12-13 1964-06-09 Plate Gmbh Dr Method for increasing the elasticity of threads made of plastic materials

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416209A (en) * 1946-03-12 1947-02-18 Unique Fibers Inc Yarn
US2755616A (en) * 1952-07-26 1956-07-24 Patentex Inc Method of twisting thread
US2778187A (en) * 1954-08-03 1957-01-22 Patentex Inc Composite yarn
US2846839A (en) * 1953-05-18 1958-08-12 Billion & Cie Soc Snag resistant bulky multi-ply superpolymidic yarn
US2846840A (en) * 1952-05-20 1958-08-12 Billion & Cie Soc Superpolyamidic threads and manufacture thereof
US2869967A (en) * 1957-08-23 1959-01-20 Du Pont Bulky yarn
US2904952A (en) * 1952-10-22 1959-09-22 Heberlein Patent Corp Process for producing crimped yarns
US2952116A (en) * 1955-07-26 1960-09-13 Textile Licensing Company Processing yarns
US2968909A (en) * 1956-05-29 1961-01-24 Textile Licensing Company Producing dual torque yarn

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416209A (en) * 1946-03-12 1947-02-18 Unique Fibers Inc Yarn
US2846840A (en) * 1952-05-20 1958-08-12 Billion & Cie Soc Superpolyamidic threads and manufacture thereof
US2755616A (en) * 1952-07-26 1956-07-24 Patentex Inc Method of twisting thread
US2904952A (en) * 1952-10-22 1959-09-22 Heberlein Patent Corp Process for producing crimped yarns
US2846839A (en) * 1953-05-18 1958-08-12 Billion & Cie Soc Snag resistant bulky multi-ply superpolymidic yarn
US2778187A (en) * 1954-08-03 1957-01-22 Patentex Inc Composite yarn
US2952116A (en) * 1955-07-26 1960-09-13 Textile Licensing Company Processing yarns
US2968909A (en) * 1956-05-29 1961-01-24 Textile Licensing Company Producing dual torque yarn
US2869967A (en) * 1957-08-23 1959-01-20 Du Pont Bulky yarn

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284996A (en) * 1961-07-07 1966-11-15 Fujii Hanjiro Method of producing crimped yarn
US3364542A (en) * 1966-02-28 1968-01-23 Wiscassett Mills Co Method of forming ladies' stretchable seamless stockings
US3703075A (en) * 1970-02-07 1972-11-21 English Sewing Ltd Method of making a yarn containing loops
US3855775A (en) * 1970-10-29 1974-12-24 Inter Textiles Europ Process for producing ply yarn from threads of fibers
US3879928A (en) * 1973-11-01 1975-04-29 Perfect Thread Company Inc Process for the manufacture of yarn and the resulting product
USRE29572E (en) * 1973-11-01 1978-03-14 Perfect Thread Company, Inc. Process for the manufacture of yarn and the resulting product

Also Published As

Publication number Publication date
GB776898A (en) 1957-06-12
AT190841B (de) 1957-07-25
FR1124865A (fr) 1956-10-19

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