US3441988A - Process and an apparatus for the production of crimped filaments - Google Patents

Process and an apparatus for the production of crimped filaments Download PDF

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Publication number
US3441988A
US3441988A US580682A US3441988DA US3441988A US 3441988 A US3441988 A US 3441988A US 580682 A US580682 A US 580682A US 3441988D A US3441988D A US 3441988DA US 3441988 A US3441988 A US 3441988A
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US
United States
Prior art keywords
filaments
roller
gap
crimping
crimp
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Expired - Lifetime
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US580682A
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English (en)
Inventor
Hans Bach
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Bayer AG
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Bayer AG
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Filing date
Publication date
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Publication of US3441988A publication Critical patent/US3441988A/en
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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
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes

Definitions

  • This invention relates to a process for the production of synthetic thermoplastic filaments having a fixed crimp, by introducing the filament or bundle of filaments into a heated gap, and to an apparatus for carrying out the process.
  • filaments from synthetic thermoplastic high polymers can be crimped by heating and guiding them around an edge.
  • filaments of this kind can be crimped by introducing them into a compression chamber at an elevated temperature. It has also been proposed to crimp filaments by introducing them between rollers Whose surfaces are inclined towards one another, so that the filaments are guided through the gap thus formed.
  • the V-gap zone is formed by a heated roller and a Wedge-gap (V-gap) segment at the end of which there is a filament brake.
  • the filaments are introduced into the V-gap zone either directly from the cop or bobbin or by way of a feed mechanism in the form of a stretching device, for example.
  • the process is carried out at temperatures in the range of from 80 C. to 180 C.
  • those of polyamides polycaprolactam and polyhexamethylene adipic amide
  • the gap between the segment and the roller and the bearing pressure are adjusted in such a way that the filaments are carried at the full peripheral speed of the roller.
  • the filament brake creates the necessary counter pressure on the issuing filaments, so that a crimp wave is built up in the V-gap.
  • the bundle of filaments is then carried further by the rotating roller and is pressed against the inner surface of the fixed segment. This results in a slight profile deformation whereby the filaments are sharply bfint (crimped). Since this takes place at the moment 01 maximum bearing pressure on the heated roller, the crimp is adequately fixed.
  • FIG. 1 An apparatus for carrying out the process is shown in FIG. 1 in the form of a crimping attachment.
  • a filament 1 travels around a delivery mechanism 2 into a gap formed by a fixed or stationary crimping segment 4 and a heated crimping roller 3.
  • the peripheral speed of the crimping roller 3 is higher than that of the delivery roller 2 so that the filament is taken between the crimping roller 3 and the crimping segment and is forced out via the brake flap 7.
  • the crimping roller 3 is adapted to be heated either by steam or by electricity, the temperature being variable within wide limits.
  • the crimping segment 4 is adjustably suspended from the support 5, and is mounted in the support 6 in such a way that it can be adjusted under spring tension.
  • the brake flap 7 is rotatably mounted in the crimping segment 4, whilst its bearing pressure on the crimping roller 3 can be varied by weight or by spring pressure.
  • FIG. II shows the wedge-gap (V-gap) arrangement With the brake flap 7 replaced by an adjustable stripping edge or doctor 15. In this case, too, an optimum crimping eflect can be obtained by selecting the clearance angle and the distance between the yarn outlet and the doctor .15.
  • the crimping effect is characterised by measuring the degree of shrinkage or contraction after steam treatment.
  • a shrinkage of 30% means that the crimped filament undergoes a decrease in length of 30% during steam treatment.
  • EXAMPLE 1 A stretched filament bundle of nylon 6 (polycaprolactam) with an overall denier of 1,200 and an individual denier of 20, is treated in an apparatus of the kind shown in FIG. I under the following conditions.
  • the gap at 5 is set at 0.3 mm.
  • the peripheral speed of the roller 3 is m./min.
  • the temperature of the roller 3 is kept at C.
  • EXAMPLE 2 A stretched filament bundle of nylon 6 (polycaprolactam) with an overall denier of 1,200 and an individual denier of 20, is treated in the apparatus shown in FIG. I.
  • the gap at 5 is set at 0.2 mm.
  • the temperature of the roller is kept at C.
  • the peripheral speed of the roller 3 is set at 300 m./min.
  • the shrinkage of a filament treated in this Way was measured as 33.5%.
  • EXAMPLE 3 A stretched filament bundle of nylon 66 (polyhexamethylene diimine adipate) with an overall denier of 1,300 and an individual denier of 18 is treated in an apparatus of the kind shown in FIG. I under the following conditions.
  • shrinkage of the sliver amounts to 39.5%.
  • a process for the production of synthetic thermorlastic filaments having a fixed crimp which comprises ntroducing the filaments into a wedge-gap zone formed )y the outer surface of a supporting and crimping roll
  • An apparatus for the production of synthetic thermoplastic filaments having a fixed crimp comprising a crimp roller whose external surface is at least partially surrounded by an adjustable, supported, gap-forming segment and means for retarding the exit of crimped filaments to a speed less than the speed at which such filaments are carried by said crimp roller from the gap zone formed by said crimp roller and said segment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US580682A 1965-09-29 1966-09-20 Process and an apparatus for the production of crimped filaments Expired - Lifetime US3441988A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0047306 1965-09-29

Publications (1)

Publication Number Publication Date
US3441988A true US3441988A (en) 1969-05-06

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ID=7101548

Family Applications (1)

Application Number Title Priority Date Filing Date
US580682A Expired - Lifetime US3441988A (en) 1965-09-29 1966-09-20 Process and an apparatus for the production of crimped filaments

Country Status (8)

Country Link
US (1) US3441988A (es)
AT (1) AT288585B (es)
BE (1) BE687410A (es)
CH (2) CH430940A (es)
DE (1) DE1660295C3 (es)
GB (1) GB1163765A (es)
NL (1) NL6613626A (es)
SE (1) SE330062B (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641637A (en) * 1969-08-04 1972-02-15 Spinn Und Zwirnerei Maschinenb Stuffing box crimping device
US3822450A (en) * 1969-04-24 1974-07-09 Bayer Ag Apparatus for producing crimped filaments from synthetic polymers
EP0115706A2 (en) * 1983-01-03 1984-08-15 Celanese Corporation Stuffer box crimper
FR2622603A1 (fr) * 1987-10-31 1989-05-05 Takehara Kikai Kenkyusho Kk Appareil de frisage de fibres
FR2674545A1 (fr) * 1991-03-30 1992-10-02 Takehara Kikai Kenkyusho Kk Dispositif de frisage de fibres.
US20220235505A1 (en) * 2021-01-22 2022-07-28 Gregory Alan Holmes Compactor for lengthwise compressive shrinkage of fabrics

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2263712A (en) * 1939-03-20 1941-11-25 Bradford Dyers Ass Ltd Process of and apparatus for shrinking fabrics and yarns
FR1125524A (fr) * 1955-03-31 1956-10-31 Procédé et dispositif pour donner à des fibres en matière synthétique et à des fils constitués de ces fibres un caractère frisé ou crêpé, et fil obtenu par ledit procédé
US3146512A (en) * 1960-05-30 1964-09-01 American Enka Corp Crimping apparatus
US3174206A (en) * 1961-11-29 1965-03-23 Klinger Mfg Co Ltd Apparatus for crimping yarn by bunching
US3177556A (en) * 1962-06-26 1965-04-13 British Nylon Spinners Ltd Drawing and crimping of synthetic filaments and yarns

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2263712A (en) * 1939-03-20 1941-11-25 Bradford Dyers Ass Ltd Process of and apparatus for shrinking fabrics and yarns
FR1125524A (fr) * 1955-03-31 1956-10-31 Procédé et dispositif pour donner à des fibres en matière synthétique et à des fils constitués de ces fibres un caractère frisé ou crêpé, et fil obtenu par ledit procédé
US3146512A (en) * 1960-05-30 1964-09-01 American Enka Corp Crimping apparatus
US3174206A (en) * 1961-11-29 1965-03-23 Klinger Mfg Co Ltd Apparatus for crimping yarn by bunching
US3177556A (en) * 1962-06-26 1965-04-13 British Nylon Spinners Ltd Drawing and crimping of synthetic filaments and yarns

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822450A (en) * 1969-04-24 1974-07-09 Bayer Ag Apparatus for producing crimped filaments from synthetic polymers
US3641637A (en) * 1969-08-04 1972-02-15 Spinn Und Zwirnerei Maschinenb Stuffing box crimping device
EP0115706A2 (en) * 1983-01-03 1984-08-15 Celanese Corporation Stuffer box crimper
EP0115706A3 (en) * 1983-01-03 1986-03-05 Celanese Corporation Stuffer box crimper
FR2622603A1 (fr) * 1987-10-31 1989-05-05 Takehara Kikai Kenkyusho Kk Appareil de frisage de fibres
FR2674545A1 (fr) * 1991-03-30 1992-10-02 Takehara Kikai Kenkyusho Kk Dispositif de frisage de fibres.
US20220235505A1 (en) * 2021-01-22 2022-07-28 Gregory Alan Holmes Compactor for lengthwise compressive shrinkage of fabrics

Also Published As

Publication number Publication date
CH474584A (de) 1969-08-15
GB1163765A (en) 1969-09-10
NL6613626A (es) 1967-03-30
DE1660295B2 (de) 1974-10-31
BE687410A (es) 1967-03-01
CH430940A (de) 1967-02-28
SE330062B (es) 1970-11-02
DE1660295A1 (de) 1970-07-09
DE1660295C3 (de) 1975-06-26
AT288585B (de) 1971-03-10
CH1119166A4 (es) 1969-03-14

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