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
  • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
  • D02G3/326—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic the elastic properties due to the construction rather than to the use of elastic material
• • 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
• • 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
  • D02G1/0286—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 characterised by the use of certain filaments, fibres or yarns
• • 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
  • D02G1/0286—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 characterised by the use of certain filaments, fibres or yarns
  • D02G1/0293—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 characterised by the use of certain filaments, fibres or yarns composed, at least in part, of natural fibres
• • 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
  • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
  • D02G3/324—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic using a drawing frame

Definitions

• ABSTRACT OF THE DISCLOSURE A process comprising temporarily high-twisting a synthetic multifilament yarn having at least one coarse filament with a titer greater than 6 denier and a plurality of finer individual filaments having a titer less than 6 denier, heat-setting the highly twisted yarn, and then releasing the twist; and synthetic multifilament yarns so produced.
• This invention relates to an elastic yarn process and product, and more particularly, it relates to a process for making a highly elastic yarn and to the novel yarn obtained thereby.
• elastic crimped yarn can be made by temporary high-twisting of synthetic multifilament yarns and heat-setting the yarns while they are temporarily highly twisted. Attempts have also been made to manufacture yarns having a high elastic extension by the aforesaid temporary high-twisting and heat-setting.
• a yarn with a high elastic extension is one which resists any elongation or tensile stress and resumes its original shape and length as quickly and as completely as possible after relaxation of the stress.
• This inventiion provides a process for the production of a highly elastic yarn which has a desirable hand.
• This invention also provides a highly elastic yarn with a desirable hand suitable for textile uses.
• the invention comprises the novel products as well as the novel processes and steps of processes according to which such products are manufactured, the specific embodiments of which are hereinafter described by way of example and in accordance with which it is presently preferred to practice the invention.
• the process of this invention comprises temporarily high-twisting a multifilament yarn containing at least one synthetic core filament with a titer above about 6 denier and a plurality of synthetic filaments having a titer less than 6 denier and heat-setting the highly twisted multifilament yarn to make the multifilament yarn highly elastic.
• the high twist is then released from the yarn.
• the product of this invention is a highly elastic yarn comprising at least one highly-twisted and heat-set synthetic filament having a titer greater than about 6 denier and a plu- "ice rality of highly-twisted and heat-set synthetic filaments with a titer less than 6 denier.
• the highly elastic yarn is combined with further yarn components.
• the highly elastic textile yarn of this invention possesses a high elastic extension and an agreeable soft hand. Accordingly, the yarn of this invention is excellent for use in the manufacture of elastic knitwear and woven goods, and such yarn is especially useful for the production of sportswear such as ski trousers, swimwear, and the like. Such yarns can be used in lieu of elastomer synthetic stretch yarns.
• the yarn of this invention preferably has a total titer of between about 30 and about 200 denier.
• the coarser filament or filaments preferably have a titer of from about 8 to about 20 denier, while a plurality of finer individual filaments preferably have individual titers in the range of between about 2 and about 5 denier.
• the individual filaments of the multifilament yarn can have differently shaped cross-sections. It is for example possible to utilize multifilament yarns, the components of which consist of individual filaments having a trilobal cross-section. Moreover, in certain embodiments of this invention one or more of the coarser filaments can be hollow.
• the synthetic multifilament yarns can 'be made by laying or otherwise combining the coarser filament or filaments with the plurality of finer individual filaments.
• the multifilament yarns treated according to this invention can also be produced directly in the spinning operation through the use of a spinneret with differently sized and/ or configured spinning holes.
• the synthetic multifilament yarns of this invention can be made from a wide variety of materials.
• the yarns are composed of synthetics which are desirably those having a relatively sharp softening or melting point.
• the synthetic multifilament yarns of this invention can comprise polyester fibers such as polyethylene-glycol-terephthalate and the like or polyolefins such as polypropylene and the like. It is especially preferred to use multifilament yarns consisting of polyamides, such as polyhexamethylene adipamide (nylon 66), condensation products of eaminocaproic acid (nylon 6) or ll-aminoundecanoic acid (nylon 11), and the like and combinations thereof.
• polyamides such as polyhexamethylene adipamide (nylon 66), condensation products of eaminocaproic acid (nylon 6) or ll-aminoundecanoic acid (nylon 11), and the like and combinations thereof.
• the crimped synthetic multifilament yarn is combined with additional yarn components.
• the crimped highly elastic multifilament yarn can be wrapped with staple fibers of natural or synthetic material.
• staple fibers used in the practice of this invention can be natural fibers of animal or vegetable origin such as wool, cotton, and the like, artificial fibers such as those prepared from viscose rayon and the like, or synthetic materials such as those set forth above, as well as polyacrylonitrile and the like.
• multifilament yarns which have been temporarily high -twisted in opposite directions.
• These multifilament yarns can be twisted or ply-twisted with from about 50 to about 600 turns per meter. It will be understood that one or both of such crimped multifilament yarns can be wrapped with staple fibers prior to ply-twisting them.
• the crimping of the multifilament yarns is preferably carried out by means of a false-twisting device, wherein the yarns are conducted through hot air or over a heated surface after they are temporarily highly twisted for the purpose of heat-setting them.
• the synthetic yarn is given a temporary high-twist on the order of thousands of turns per meter and then heated to a temperature somewhat below its fusion point.
• the yarn is then cooledto' temperature substantially below the fusion point So as permanently "to fix the twist in the yarn and the twist is released to provide a highly elastic yarn.
• various types of twisting machines such as ring or up-twisters with or without a hollow Spindle can be used. It will be understood herein that such false-twisting is used in practicing some aspects of this invention.
• the elastic extension of the yarn as used herein is determined according to the following procedure:
• the wetted strands are suspended from a hook and weighted while in the wet condition to produce a stress of about 0.2 g./denier, so that the suspended strands are completely smooth. After remaining under this tension for one minute, the lengths of the five strands (X to X are measured. The weights are then removed, and
• the strands are dried While hanging freely suspended without any weights at 50-60 C. When the strands are dry they are weighted to provide a stress of 0.02 g./ denier, and after one minute their Weighted lengths (Y to Y are measured.
• Elastic Extension 100-
• the yarns of this invention possess a high elastic extension. Generally these yarns have an elastic extension on the order of about and above and frequently on the order of about and above.
• a second identical yarn is crimped in the same manner, but the false twist is imparted in the opposite direction.
• the two yarns which have been false-twisted in opposite twist direction are then ply-twisted together at the rate of 270 turns per meter in the .9 direction to produce the finished yarn.
• the yarn so obtained according to this invention exhibits an elastic extension of 33.8%.
• a 70-denier nylon 66 yarn composed of 17 individual filaments having a titer of about 4.16 denier each, is temporarily high-twisted at 3100 turns per meter by means of a false twisting device and heated at 235 C. for approximately 0.4 second in the highly-twisted configuration.
• a second yarn having the same composition is crimped by false-twisting as described above, but in the opposite direction.
• the two yarns are then ply-twisted together at 270 turns per meter in the s direction.
• the ply-twisted yarn composed of two 23-filament yarns obtained outside this invention has elastic extension of 21% EXAMPLE II
• a 70-denier nylon 66 multifilament yarn consisting of two individual filaments with a titer of 15 denier each and 13 individual filaments with a titer of about 3 denier each is temporarily high-twisted at 3000 turns per meter and heated at 230 C. for approximately 0.5 second by means of hot air.
• a second yarn which is identical is treated in the same way, but is temporarily high-twisted in the opposite direction.
• the two yarns are then ply-twisted at 270 turns per meter.
• the ply-yarn so obtained has an elastic extension of 32.6%.
• EXAMPLE III A 70-denier e aminocaproic acid condensation product (nylon 6) multifilament yarn consisting of two individual filaments with a titer of 10 denier each and 12 individual filaments with a titer of about 4.16 denier each is temporarily high-twisted at 3000 turns per meter and heated in the highly-twisted state at 195 C. for approximately 0.8 second by means of hot air.
• a second identical yarn is treated in the same way, except that it is highly-twisted in the opposite direction.
• the two yarns are then ply-twisted together at 500 turns per meter.
• the ply-yarn so obtained possesses a very high elastic extension and an agreeable :soft hand.
• EXAMPLE IV A 74-denier polyethyleneglycol-terephthalate multifilament yarn consisting of 3 individual filaments having a titer of 10 denier each and 20 individual filaments having a titer of about 2.5 denier each is temporarily hightwisted on a false-twisting device at 3100 turns per meter and heated at 235 C. for approximately one second in the highly-twisted state.
• a second identical yam is treated in the same manner, but it is temporarily high-twisted in the opposite direction.
• the two yarns so obtained are ply-twisted in opposite directions at 60 turns per meter.
• the ply-yam so obtained has a high elastic extension and a soft handle.
• EXAMPLE V Two multifilament yarns crimped as in Example I and consisting of 65 denier nlyon 66 are separately wrapped on a ring-spinning machine with a wool roving having a metric number of 2.2. The stretching rate in the wrapping operation is about 30. After wrapping, the wrapped multifilament synthetic yarns are ply-twisted together at turns per meter.
• a combination yarn with high elastic extension and good slip proofness of the staple fibers is obtained.
• a process for the production of elastic yarn which comprises crimping a synthetic multifilament yarn having at least one coarse synthetic filament with a titer greater than about 6 denier and a plurality of finer synthetic filaments having a titer less than 6 denier by temporarily high-twisting the multifilament yarn, heat-setting the multifilament yam while highly twisted to render such yarn highly elastic and then releasing the high twist from the heat-set yarn.
• each of the coarse filaments has a titler of from about 8 to about 20 denier.
• each of the plurality of finer synthetic filaments has a titer of between about two and about five denier.
• a highly elastic crimped synthetic multifilament yarn comprising at least one coarse synthetic individual filament with a titer greater than about 6 denier and a plurality of individual synthetic filaments with a titer less than 6 denier, said yarn having good elastic extensron.
• the yarn of claim 13 with a total titer in the range of from about 30 to about 200 denier.
• the yarn of claim 13 having two or more coarse filaments.
• each of the coarse filaments has a titer of from about 8 to about denier.
• each of the plurality of the finer synthetic filaments has a titer between about two and about five denier.
• a ply yarn comprising two crimped synthetic multifilament yarn components, each component comprising at least one individual synthetic filament with a titer greater than about 6 denier and a plurality of individual synthetic filaments having a titer less than 6 denier, one component having its twist in the opposite direction to the other component.

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

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4186635

Family Applications (1)

Country Status (8)

Cited By (4)

Families Citing this family (2)

Citations (14)

• 1965
  • 1965-01-13 CH CH42165A patent/CH426089A/de unknown
  • 1965-02-02 FR FR45575A patent/FR1463462A/fr not_active Expired
  • 1965-12-20 DE DE19651660347 patent/DE1660347A1/de active Pending
  • 1965-12-22 AT AT1157365A patent/AT282424B/de not_active IP Right Cessation
  • 1965-12-29 US US517422A patent/US3396529A/en not_active Expired - Lifetime
  • 1965-12-31 GB GB55457/65A patent/GB1099786A/en not_active Expired
• 1966
  • 1966-01-10 NL NL6600269A patent/NL6600269A/xx unknown
  • 1966-01-11 BE BE674955D patent/BE674955A/xx unknown

Patent Citations (14)

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