US3606689A - Apparatus for heat treatment of filament - Google Patents

Apparatus for heat treatment of filament Download PDF

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Publication number
US3606689A
US3606689A US801092A US3606689DA US3606689A US 3606689 A US3606689 A US 3606689A US 801092 A US801092 A US 801092A US 3606689D A US3606689D A US 3606689DA US 3606689 A US3606689 A US 3606689A
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United States
Prior art keywords
filament
gas stream
inlet
cylinder
heating cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US801092A
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English (en)
Inventor
Tatsuki Matsuo
Takashi Fukuda
Shosuke Nanri
Katsuya Ishitobi
Ryunosuke Masuda
Hiroshi Okano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyobo Co Ltd
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Toyobo Co Ltd
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Publication date
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/228—Stretching in two or more steps, with or without intermediate steps
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/02—Heat treatment
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D01D10/0481—Supporting filaments or the like during their treatment while in continuous movement the filaments passing through a tube
    • 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
    • D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
    • D02G1/205—After-treatments for fixing crimp or curl

Definitions

  • the present invention relates to an apparatus for the heat treatment of a filament, particularly to an apparatus for heat treating a filament efficiently in the relaxed state with a prevention from becoming entangled in a filament feeding roller and being ruffied under the influence of a turbulent flow.
  • the conventional heat treatment is largely carried out in such a manner that the filament is made in hank or placed on a net and then subjected to the treatment.
  • the filament is continuously fed through a feeding roller to an apparatus for heat treatment and, while permitting to shrink, taken up at a rate slower than the feeding rate.
  • the filament in the relaxed state can not be heattreated with a high efiiciency, although it is improved by bringing the filament under a tension into close contact with a heating plate;
  • the present invention is directed to overcome these drawbacks in the known methods and apparatuses.
  • an apparatus for treatment of the filament in the relaxed state with a hot gas stream which comprises a heating cylinder, an inlet portion for the filament provided at one end of the cylinder, an outlet for the filament provided at the other end, and an inlet for a secondary gas stream provided near the inlet portion, the filament being joined by primary gas stream at the inlet portion and then introduced through the inlet portion into the cylinder.
  • the inlet for the secondary gas stream is so constructed that the secondary gas stream is supplied with autogenic or elevated pressure from a separate secondary gas stream supplier;
  • the heating cylinder is constructed surrounded by a jacket having an upper port near a filament inlet in the inlet portion for the filament and a lower port at an appropriate position lower than the filament inlet, and the hot gas stream is introduced from an optional position lower than the filament inlet into the jacket and circulated through the upper port into the heating cylinder;
  • the inlet for the secondary gas stream is formed in a narrow slit provided in the direction of the filament over the whole length of the inlet portion for the filament and the heating cylinder;
  • a structure wherein a slit, through the filament can be fed or applied, is provided as the secondary gas stream inlet at the filament inlet and the heating cylinder (as shown in FIG. 7);
  • the slit may be opened when the filament is fed or applied thereto and closed by a lid except at the place near the filament inlet during operation.
  • the secondary gas stream inlet may be provided in one or more slits, annular holes, round holes or the like.
  • FIG. 1 is an elevational view, partly in cross-section of one embodiment of a filament heat-treatment apparatus in accordance with the present invention.
  • FIGS. 2 and 3 are partial cross-sectional views, on an enlarged scale, illustrating t-wo modified embodiments of the head portion for the heat treatment apparatus of FIG. 1.
  • FIG. 4 is a partial schematic elevational view of a modified heat-treatment apparatus according to the present invention with an auxiliary unit providing a filament suction.
  • FIGS. and 6 are longitudinal axial cross-sectional views of two further modified embodiments of a filament heat-treatment apparatus in accordance with the present invention with a naturally circulating secondary gas stream.
  • FIGS. 7, 8 and 9 are axial longitudinal cross-sectional lowing description referring to the attached drawings wherein 1 is a filament before heat-treatment, 2 is a filament feeding inlet, 3 is a primary hot gas supply port, 4 is a filament inlet (a primary hot gas inlet), 5 is a secondary gas supply port, 6 is a heating cylinder, 7 is a pair of feeding rollers, 8 is a rectifying plate, 9 is a filament outlet, 10 is a pair of take-up rollers, 11 (FIGS. 5, 6 and 8) is a jacket, 12 is a secondary gas suction port, 13 is a circulation area, 14 is a natural circulation gas (secondary gas) supply port, 15 is a gas flow regulating plate and 16 (FIGS. 10-12) is a slit.
  • 1 is a filament before heat-treatment
  • 2 is a filament feeding inlet
  • 3 is a primary hot gas supply port
  • 4 is a filament inlet (a primary hot gas inlet)
  • 5 is a secondary gas supply
  • the heating cylinder 6 is provided with a heater (not shown) on the inner surface.
  • the filament 1 is fed through a pair of feeding rollers 7 to the filament feeding inlet 2.
  • Primary hot gas stream is introduced from the primary hot gas supply port 3, joins with the filament 1. at the portion A, transports the filament at the portion B to the direction of the portion C and is conducted through the filament inlet 4 into the heating cylinder.
  • the filament 1 is ejected into the heating cylinder by the primary hot gas stream.
  • the primary hot gas stream is combined with the secondary gas stream and transports the filament smoothly during which a heat treatment of the filament in the relaxed state is accomplished.
  • the filament is continuously introduced into the heating cylinder and, after heat treatment, taken out from the outlet 9 by means of the take-up rollers 10.
  • the hot gas stream is also discharged from the outlet 9.
  • FIGS. 2. and 3 Other embodiments of the head portion consisting of a filament feeding inlet 2, a primary hot gas supply port 3, a secondary gas supply port 5 and an upper portion of the heating cylinder 6 are shown in FIGS. 2. and 3. Except for the illustrated modifications, they are constructed in the same manner as the one shown in FIG. 1.
  • Embodiments of the apparatus for the use of a naturally circulating gas stream as the secondary gas stream are shown in FIGS. 5 and 6 wherein filament proceeds as in FIG. 1.
  • the primary hot gas stream is introduced through the primary hot gas supply port .3, joins with the filament land is then conducted to the heating cylinder 6.
  • the hot gas stream flows down along in the direction of the filament and is partly discharged from the filament outlet "9.
  • the remaining portion of the hot gas stream is naturally sucked through the secondary hot gas stream suction ports 12, flows through the circulation area 13 between the heating cylinder 6 and the fiacket 11 and is recycled as a secondary gas stream into the heating cylinder 6 through the natural circulation gas supply port 14 opened near the filament inlet 4.
  • a gas flow regulating plate 15 is provided 4 so as to regulate constantly the amount of flow of the secondary gas stream.
  • FIGS. 7, 8 and 9 Embodiments of the apparatus in which the whole or part of a secondary gas stream is introduced through a slit are shown in FIGS. 7, 8 and 9.
  • the cross sectional views taken along line A-A' in FIG. 7, along line BB' in FIG. 7 and at C-C' in FIG. 8 are shown in. FIGS. 10*, 11 and 12, respectively.
  • the filament proceeds as in FIG. 1.
  • the primary hot gas stream is introduced through the primary hot gas supply port 3, joins with the filament 1 and is then led to the heating cylinder 6-.
  • the [whole or part of secondary gas stream is introduced through the slit 16 (shown in FIGS. 10, 11 and 12 which is conveniently availablefor supplying or feeding the filament to the apparatus therethrough.
  • the slit may be narrow and is, for instance, preferably formed about 0.1 to 1.0 mm. Wide for the treatment of filaments of deniers.
  • the role of the circulation area 13 in FIGS. 8 and 9 is entirely the same as that in FIGS. 5 and
  • the cross section of the heating cylinder 6 is provided sufiiciently larger than that of the primary gas supply port 3 and the flow amounts of the secondary gas stream and of the primary gas stream are controlled so as to reduce the flow velocity of the gas stream in the cylinder 6 andthereby to keep the filament in the relaxed state.
  • the temporary pressure reduction may occur at the portion D shown in FIG. l.through the action of the primary gas stream with the development of air eddies at the portion E near the inner peripheral wall of the cylinder.
  • the development of air eddies therein may cause the filament to flow backward and then to stay around an end portion of the filament feeding inlet so that the filament is not smoothly transported through the cylinder.
  • the fiow amount of the secondary gas stream is excessive, the filament can be smoothly transported through the cylinder.
  • the fiow amounts of the primary and secondary gas streams must be suitably regulated.
  • the secondary hot gas stream is practically favored to successively circulate through the cylinder in a manner that the hot gas introduced is sucked out of the cylinder at an optional position about an end portion thereof, as shown in FIGS. 5, 6, 8 and 9.
  • the hot gas stream flowing through the heating cylinder is the sum of the circulation gas stream and a gas to be supplied together with the filament.
  • the apparatus as herein described does not only create turbulent flow in the neighborhood of the filament feeding inlet but also is effective to reduce the amount of hot gas stream to be supplied, thereby saving the cost of production, and because the amount of hot gas stream in the heating cylinder is great, the heat treatment effect of the gas cur rent on the filament increases.
  • the apparatus embodied in FIGS. 5, 6, 8 and 9 in which the secondary hot gas stream is formed by natural circulation is of particular favor by reason of the simplicity of structure, the efficient utilization of heat and the high efficiency of heat treatment.
  • a typical example of the jacket in the present invention (embodied in FIGS. 5 and 6) is so constructed as surrounding the heating cylinder. As a matter of course, it maybe constructed in any other form as long as the secondary gas stream naturally sucked from the lower position of the heating cylinder is circulated into the heat ing cylinder at the position near the filament feeding inlet.
  • the application or feel of the filament to the apparatus can be advantageously effected with facility.
  • An introduction portion of both filament and the primary hot gas may be arranged in any forms, for example, the form as shown in FIG. 1 in which the filament rides in the hot gas to be introduced from one side thereof, or the forms as shown in FIGS. 2 and 3 in which the hot gas introduced flows into the cylinder while surrounding the filament.
  • the pneumatic pressure of the primary hot gas may be normally below 2 kg/cm? (gauge pressure) preferably below 0.5 kg./crn. for the operational condition.
  • the flow amount per each filament is usually above ml./sec. (preferably 50 ml./sec.) and below 4,000 ml./sec. a
  • the temperature of the heating cylinder is widely varied with the kind of the filament to be heat-treated and may he usually from about 70 to about 250 C.
  • the temperatures of the primary gas stream and of the secondary gas stream are ordinarily from about 70 to about 250 C. and from room temperature to about 250 C., re spectively.
  • the cross section of the heating cylinder should be sufliciently larger, preferably not less than 4 times larger and particularly more than 10 times and lessthan 20 0 times larger, than that of the introduction portion of both filament and the primary hot gas in size such as diameter or side.
  • the length of the cylinder should be determined in consideration of the period for the filament to remain therein and the heat-treating maturity for the filament to thermal-shrink, said period being adjusted longer than said heat-treating maturity. It is practically estimated at least cm., preferably more than 30 cm. and less than 2 m.
  • the filament fed through the cylinder may be constructively taken up by means of take-up rollers as shown in FIGS. 1, 5 and 9.
  • the filament may be wound up after it is thrown off on a movable tool such as wire net.
  • take-up rollers are provided, the filament on one hand is fed through the cylinder by means of the gas stream and on the other hand taken up thereby.
  • the filament feeding velocity should be higher than the take-up velocity of the rollers or the discharging velocity -of the gas stream.
  • the apparatus of the present invention can be applied to various processes of thermal treatment in the textile industry, for example, in the process of secondary setting of textured multifilament, in the process of thermal setting for the purpose of the shrinkage reduction in filament, in the process of bulking through thermal shrinkage spun yarn or multifilament constituted with fibers'having different thermal shrinkage properties, or in the process of the crimp formation on fiber yarns, such as bicomponent filament yarn as their representative, having latent crimping ability.
  • the apparatus of the present invention can be suitable for the crimp formation on fiber yarn having the latent crimping ability.
  • the filament should be in the highly relaxed state and should be heat treated under the extremely low tension, as the case may be, in the range of 1 10- to 1X10 mg./d.
  • the apparatus of the present invention can be suitable for the crimp formation also on multifilaments having a latent crimping ability.
  • an auxiliary unit for filament suction as shown in FIG. 4 may be arranged therein as a further improvement in the filament feeding effects. Such a unit also has an effect to facilitate a process of passing the filament through its feeding inlet while in a rapid treating operation.
  • reference numeral 1 designates a filament before being heat-treated
  • 17 is an auxiliary unit providing for filament suction
  • 3 is a primary hot gas supply port
  • 5 is a secondary gas supply port
  • 6 is a heating cylinder.
  • the heat treatment according to the present invention may be directly connected with the stretching process in order, for example, to effect successively stretching and heat-treating, as shown in FIG. 9.
  • the feeding rollers may also serve as stretching rollers.
  • a filament may be sometimes subject to heat treatment under the condition by which torque is produced in the filament. In some other cases, however, even slight false twist will bring an unfavorable result and, in these cases, the circulation of the primary gas stream should be inhibited.
  • one or more filaments may be heat-treated separately or simultaneously.
  • the sections of the primary gas stream inlet and of the heating cylinder may be favorably formed of rectangular shape.
  • EXAMPLE 1 Feeding velocity: 400 m./min. Take-up velocity: 200 m./min. Primary hot gas stream: air
  • Diameter 25 mm.
  • the multifilament thus obtained was of a crimp number of 31 and a crimp index of 35%.
  • the crimp number was expressed by the number of crimps per inch under a tension of 2 mg./d.
  • the crimp index was calculated according to the following equation:
  • EXAMPLE 2 A multifilament of polyethylene terephthalate with 24 filaments and 50 deniers was false-twisted and wound up. The multifilament was heat-treated in the relaxed state using an apparatus provided with the head portion as shown in FIG. 2 under the following conditions:
  • Feeding velocity 600 m./min. Take-up velocity: 420 m./min.
  • Primary hot gas stream air
  • Heating cylinder Diameter of filament inlet: 1.5 mm. Heating cylinder:
  • Diameter 25 mm. Length: 500 mm. Inner temperature: 155 C.
  • EXAMPLE 3 A multifilament of polyethylene terephthalate 9-isophthalate 1 copolymer of a shrinkage rate of 12.5% when treated with boiling water for 30 minutes and of 24 filaments and 50 deniers was heat-treated in the relaxed state using an apparatus as shown in FIG. 5 under the following conditions:
  • EXAMPLE 4 Polyethylene terephthalate of 0.68 in intrinsic viscosity and polyethylene terephthalate 9-isophthalate 1 copolymer of 0.65 in intrinsicv viscosity were subjected to conjugate melt spinning to obtain a side-by-side type bicomponent filament with 30 filaments and 585 deniers. The undrawn filament was continuously stretched and heat-treated in the relaxed state using an apparatus as shown in FIG. 9 under the following conditions:
  • Feeding velocity 50 m./ min.
  • Feeding velocity 225 m./ min.
  • Hot gas stream air I Pneumatic pressure: 0.4 kg/cm. (gauge pressure) Flow amount: 500 mL/sec.
  • Diameter of filament inlet 2.0 mm.
  • Width of slit 0.2 mm. 7
  • Diameter 300 mm.
  • Length 600 mm. Width of slit: 0.2 mm. Inner temperature: 150 C.
  • An apparatus for the treatment of a filament in the relaxed state with a primary hot gas stream which comprises a heating cylinder, an inlet portion for the filament provided at one end of the cylinder, an outlet for the filament provided at the other end, and an outlet for a secondary gas stream provided near said inlet portion, the filament being joined by said primary hot gas stream at the inlet portion and then introduced through the inlet portion into the cylinder, wherein the heating cylinder is surrounded by a jacket having an upper port near a filament inlet in the inlet portion for the filament and a lower port at an appropriate position lower than the filament inlet, and the hot gas stream is introduced from an optical position lower than the filament inlet into the jacket and circulated through the upper port into the heating cylinder.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
US801092A 1968-02-20 1969-02-20 Apparatus for heat treatment of filament Expired - Lifetime US3606689A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1100168 1968-02-20
JP1245468 1968-02-26
JP5784768 1968-08-13

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US3606689A true US3606689A (en) 1971-09-21

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FR (1) FR2002251A1 (enrdf_load_html_response)
GB (1) GB1264995A (enrdf_load_html_response)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863360A (en) * 1971-10-28 1975-02-04 Agfa Gevaert Ag Sheet drying apparatus
US4270962A (en) * 1978-11-15 1981-06-02 Chisso Corporation Process and apparatus for the preparation of bar form fibrous molding
US5193293A (en) * 1991-07-18 1993-03-16 Pierre Mirabel Device for the heat treatment of yarns in motion
US5390400A (en) * 1992-07-10 1995-02-21 Hoechst Aktiengesellschaft Process for heat treating moving yarns and apparatus therefor
US5538792A (en) * 1992-07-10 1996-07-23 Hoechst Aktiengesellschaft Process for drawing heated yarns, thereby obtainable polyester fibers, and use thereof
US20140366349A1 (en) * 2011-09-09 2014-12-18 Christian Hubert Device for treating a thread
US20160039156A1 (en) * 2014-08-06 2016-02-11 Karl Mayer Textilmaschinenfabrik Gmbh Apparatus and method for straightening filaments
CN109945616A (zh) * 2019-03-08 2019-06-28 付菲 一种纺织用纱线烘干设备
CN111519264A (zh) * 2020-04-24 2020-08-11 江苏奥神新材料股份有限公司 一种纤维加热系统

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863360A (en) * 1971-10-28 1975-02-04 Agfa Gevaert Ag Sheet drying apparatus
US4270962A (en) * 1978-11-15 1981-06-02 Chisso Corporation Process and apparatus for the preparation of bar form fibrous molding
US5193293A (en) * 1991-07-18 1993-03-16 Pierre Mirabel Device for the heat treatment of yarns in motion
US5390400A (en) * 1992-07-10 1995-02-21 Hoechst Aktiengesellschaft Process for heat treating moving yarns and apparatus therefor
US5538792A (en) * 1992-07-10 1996-07-23 Hoechst Aktiengesellschaft Process for drawing heated yarns, thereby obtainable polyester fibers, and use thereof
US20140366349A1 (en) * 2011-09-09 2014-12-18 Christian Hubert Device for treating a thread
US9422645B2 (en) * 2011-09-09 2016-08-23 Oerlikon Textile Gmbh & Co. Kg Device for treating a thread
US20160039156A1 (en) * 2014-08-06 2016-02-11 Karl Mayer Textilmaschinenfabrik Gmbh Apparatus and method for straightening filaments
US10029428B2 (en) * 2014-08-06 2018-07-24 Karl Mayer Textilmaschinenfabrik Gmbh Apparatus and method for straightening filaments
CN109945616A (zh) * 2019-03-08 2019-06-28 付菲 一种纺织用纱线烘干设备
CN109945616B (zh) * 2019-03-08 2020-10-09 南通宏丰色织厂 一种纺织用纱线烘干设备
CN111519264A (zh) * 2020-04-24 2020-08-11 江苏奥神新材料股份有限公司 一种纤维加热系统

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DE1908594B2 (de) 1976-04-08
FR2002251A1 (enrdf_load_html_response) 1969-10-17
DE1908594A1 (de) 1969-09-04
GB1264995A (enrdf_load_html_response) 1972-02-23

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