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
  • 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
  • D02G1/024—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 provision for imparting irregular effects to the yarn

Definitions

• ABSTRACT [30] Foreign Application Priority Data An elastic, l0w-bu1k, textured yarn with a curl count of from 300 to 700 turns per meter, having alternating Sept. 16, 1969 Germany ..P 19 46 791.5 portions with s twist and Zmvist, of irregular length [52] 11.8. CI. ..57/l40 R, 57/34 AT, 57/157 TS 51 Int. Cl. ..1)02g 1/02 6 i N0 Drawings [58] Field of Search .57/34 HS, 34 AT, 77.4, 157 TS,
• This invention relates to an elastic, low-bulk, textured endless yarn of synthetic high polymers.
• the stitch pattern of the twisted yarn in the knitted article is clear, whilst the stitch pattern of the falsetwist yarn in the knitted article is irregular and mossy in appearance.
• the twisting process is very expensive and uneconomical, both in regard to the production of the yarn and in regard to processing on hosiery machines.
• the yarn according to the invention is an elastic, low-bulk, textured endless yarn with a curl count of 300 to 700 turns per meter which has alternating positions with S-twist and Z-twist of irregular length.
• the scattering of the genuine twist in the yarn crimped in the S-direction is preferably over 10 to 300 turns per meter, while the scattering of the genuine twist in a yarn twisted in the Z-direction is over 10 to 300 turns per meter.
• the coefficient of variation is from to and preferably from 7 to 8.
• the process for the production of the yarn according to the invention is distinguished by the fact that a filament treated with preparation, consisting of a plurality of single capillaries, of synthetic high polymers (minifil) is false-twist-crimped in its stretched state, the false-twist conditions being adjusted unlike normal machine setting conditions in such a way that the yarn is crimped at rates of from 200 to 900 m/minute under a tension of l to 2 g/dtex and at a temperature of from 150 to 220C.
• a filament treated with preparation consisting of a plurality of single capillaries, of synthetic high polymers (minifil) is false-twist-crimped in its stretched state, the false-twist conditions being adjusted unlike normal machine setting conditions in such a way that the yarn is crimped at rates of from 200 to 900 m/minute under a tension of l to 2 g/dtex and at a temperature of from 150 to 220C.
• the twister is designed in such a way that the torque is transmitted to the filament with twisting slip and without any reliable blockage of twist, so that the twists are continuously formed without any regularity by the twister.
• EXAMPLE 1 An unstretched polyamide-6 filament (dtex 22/3) of three individual filaments is crimped with a friction twister at a rate of 500 meters per minute, under a draft of 230 percent, under a stretching strain of 20 g, with 8,000 twists per minute, at a temperature of 200C, and wound up under a tension of 0.1 g/den.
• the curl twist amounts to 500 turns per meter, whilst the material has a residual shrinkage of 7 percent.
• Curl twisting is determined in the usual way with a conventional twist tester in which a filament loop of definite length is clamped and twisted under specific load. After the swinging yarn has come to rest, the genuine twist of the yarn is determined by means of a known twist gauge or alternatively the swinging process is periodically measured and calculated.
• EXAMPLE 2 An unstretched polyamide-6,6 filament (dtex 33/6) of 6 individual filaments is crimped with a friction twister at a rate of 500 meters per minute, under a draft of 230 percent, under a stretching strain of approximately 27 g, with 7000 twists per meter at a temperature of 220C and wound up under a tension of 0.] g/den. The curl twist amounts to 300 turns per meter, and the material has a residual shrinkage of 5 percent.
• An elastic, low-bulk, textured yarn having a curl count of from 300 to 700 turns per meter, and having alternating portions of S-twist and Z-twist, of irregular length, said portions of S-twist and Z-twist each having 10 to 300 genuine twist turns per meter.
• a yarn as claimed in claim 1 wherein the yarn is made from filaments of nylon-6 or nylon-6,6.
• a process for producing an elastic, low-bulk, textured yarn composed of a plurality of individual high polymer filaments which comprises subjecting said plurality of filaments to the action of a frictional false twisting device at a rate of 200 to 900 meters per minute while'said filaments are being stretched, said filaments being frictionally false twisted by applying at.
• a process as claimed in claim 5 wherein the high polymer is nylon-6 or Nylon-6,6.

Landscapes

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=5745611

Family Applications (1)

Country Status (9)

Cited By (4)

Families Citing this family (1)

Citations (6)

• 0
  • BE BE756220D patent/BE756220A/xx unknown
• 1969
  • 1969-09-16 DE DE19691946791 patent/DE1946791B2/de not_active Withdrawn
• 1970
  • 1970-08-27 AT AT778270A patent/AT322089B/de not_active IP Right Cessation
  • 1970-08-28 CH CH1293470A patent/CH516014A/de not_active IP Right Cessation
  • 1970-09-09 GB GB4308570A patent/GB1326764A/en not_active Expired
  • 1970-09-10 US US00071251A patent/US3710565A/en not_active Expired - Lifetime
  • 1970-09-11 NL NL7013499.A patent/NL156764B/xx unknown
  • 1970-09-16 FR FR7033613A patent/FR2062218A5/fr not_active Expired
• 1973
  • 1973-09-17 JP JP48103960A patent/JPS5119505B1/ja active Pending

Patent Citations (6)

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