US3785017A - T for the continuous crimp development of three-dimensionally crimped synthetic fibers and filaments - Google Patents

T for the continuous crimp development of three-dimensionally crimped synthetic fibers and filaments Download PDF

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Publication number
US3785017A
US3785017A US00248853*7A US3785017DA US3785017A US 3785017 A US3785017 A US 3785017A US 3785017D A US3785017D A US 3785017DA US 3785017 A US3785017 A US 3785017A
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US
United States
Prior art keywords
equipment
heating box
conveyor belt
tow
crimp
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
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US00248853*7A
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English (en)
Inventor
G Buttner
K Heinrich
I Jacob
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Hoechst AG
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Hoechst AG
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Publication date
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Priority claimed from DE19712121674 external-priority patent/DE2121674A1/de
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Publication of US3785017A publication Critical patent/US3785017A/en
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    • 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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • 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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D01D5/23—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool by asymmetrical cooling of filaments, threads, or the like, leaving the spinnerettes

Definitions

  • ABSTRACT a horizontally moving conveyor belt, another heating box for the after-setting of the crimped fiber tow, as well as a draw-off device.
  • the present invention relates to an equipment for the continuous development of the latent crimp of fiber tows of synthetic linear high molecular weight polymers in accordance with the process of U. S. Pat. 3,710,463.
  • the latently crimped filaments are drawn, subsequently dried, at a temperature in the range of from 50 to 230C without permitting shrinkage, and, without applying any tension at all to the filament, the crimp is then developed by means of a heat treatment at a temperature in the range of from 60 to 230C, preferably of from 90 to 130C.
  • the latently crimped fiber tow is allowed to fall down freely for 1 meter before dropping on the conveyor belt, and the crimp is developed immediately above the conveyor belt in a state of minimum filament tension, for example by means of overheated steam, and subsequently set.
  • a vertical heating tube is known from British Pat. No. 1,016,100, in which tube the crimp is developed in a temperature range of from 90 to 160C.
  • French Pat. No. 1,579,662 describes the development of crimp by means of a hot gas jet, and subsequent deposit and transport of the filaments on a conveyor belt.
  • German Offenlegungsschrift No.'l,8l7,492 the crimp is developed in a cylindrical heatable blowing chamber at a temperature in the range of from 150 to 250C under shrinkage conditions, and according to German Offenlegungsschrift No. 1,660,456, the crimp of a tow of bi-component filaments being free from tension is developed by means of a steam or air jet having a temperature of 200C.
  • An especially important feature of this equipment is the heating box, in which the latently crimped fiber tow is contacted with the heated agent of treatment.
  • this agent flowing in should disarrange the tow, and thus subject it to uncontrollable forces which disturb the sensitive process of crimp development.
  • the agent should be admitted to the heating box in a rather slow and diffuse manner, but nevertheless in sufficient amounts, so that it will be able to penetrate the whole tow and heat it to the necessary temperature during the relatively short period of its action. It is important that the tow freely falls in vertical direction into the heating box, which is ensured by a special design of the guide device and a certain minimum distance of this guide device from the heating box.
  • the heated walls 5 are double walls; the hot gas developing the crimp being conducted through the inside space of these walls.
  • a further special design of the equipment of the invention provides a heating box 3, the maximum height of which being 100 cm, preferably from 5 to 50 cm, the depth from 10 to 25 cm, preferably from 14 to 18 cm, and the width being determined by the equation B [cm] a K [dtex] 10' in which B is the width of heating box 3 and K the thickness of the tow in dtex.
  • an especially appropriate equipment is as follows; the lower end of heating box 3, on side 9 turned towards the moving direction of conveyor belt 6, is shorter than on side 10 turned off conveyor belt 6; side 9 thus ends at a distance of from 5 to 20 cm, preferably from 10 to 15 cm, above conveyor belt 6, its lower part being bent to an angle up to 90 in the moving direction of conveyor belt 6 and having a nozzle 4 with blowing device directed towards conveyor belt 6.
  • nozzles '4 preferably are concentric double nozzles, the slits of which are staggered by C.
  • the outer slits of nozzles 4 are closed by a wire cloth having preferably from 2,000 to 6,000 meshes per cm
  • the cited devices may be of a design as follows: guide device 2 is preferably a bar godet (FIG. 1); the 16 bars of which, for example, having a diameter of 30 mm, are attached with their ends at the rim of 2 circular disks having each a diameter of 40 cm.
  • guide device 2 is preferably a bar godet (FIG. 1); the 16 bars of which, for example, having a diameter of 30 mm, are attached with their ends at the rim of 2 circular disks having each a diameter of 40 cm.
  • the distance between guide device 2 and conveyor belt 6 is of special importance: in order to ensure a reliable run-off of the tension-free, slightly crimped tow, it is necessary to subject it to the load of at least 1 m of tow at the spot where it shall leave the bar godet and fall down.
  • the proper distance between the heating box and the conveyor belt is an important feature of the present invention.
  • steam which develops the crimp
  • a special design of the heating box therefore provides hot air nozzles for preheating the tow in the upper part thereof.
  • the equipment of the invention with the cited distances of the substantial devices from each other ensures that the crimp is developed at a moment at which the tow is in the optimum state for the crimp, i.e., nearly without any tension.
  • the nozzles through which steam is introduced into the space of treatment are preferably slit nozzles having a width of from 0.5 to mm, preferably from 3 to 6 mm.
  • An especially favorable design of the device provides concentric double nozzles the slits of which are When the tow enters the heating box, it still has the slight tension established by the dead weight of the piece of tow between the upper end of the heating box and the conveyor belt. If this tow was not subjected to any other force, this tension would continue diminishing with the progressive approach of the tow to the conveyor belt and be about zero at the moment of striking the belt. In reality, the zero value is already reached before, since the tow is somewhat stuffed. The tow, therefore, has the tension which is ideal for the crimp development just when passing through the heating box, where, while maintaining the proper distances, most favorable conditions for the crimp development are present.
  • the heating box for developing the crimp is designed as rectangular double wall box (FIG. 2), the side walls of which contain embedded nozzles'through which a heat transferring agent is contacted with the fiber tow.
  • FIG. 3 is a top view of this device of the invention
  • FIGS. 4 and 5 are side views of it. No disturbing water of condensation can settle on the inside walls. According to the invention, this is achieved by heating the double wall with steam having the same temperature as the steam used for developing the crimp, for example 100C. By this step, condensation of steam is avoided which otherwise would cause the filaments of the practically tension-free tow to adhere to the wall and thus to stop the passage of the tow through the steam box.
  • the narrow face A of the inside space should be from 10 to 25 cm, preferably from 14 to 18 cm, so that a good penetration of the tow by the steam is ensured.
  • the large face B should be adapted to the thickness of the tow and not be inferior to the amount of the following equation:
  • a heating box having an inside width of at least 40cm is used.
  • the nozzles thorugh which the steam is introduced into the box are embedded in the large faces.
  • the height of the box should not substantially exceed 100 cm, but be preferably from 5 to 50 cm.
  • the side of the heating box which is turned to the conveyor belt in its moving direction may be shorter than the other one and end from 5 to 20 cm, preferably from 10 to l5 cm, above the conveyor belt (FIG. 4).
  • An especially favorable design of the device provides that the last part of this wall of the heating box is bent in such a manner as to form an angle of up to staggered by 180.
  • a very advantageous design of the device provides the nozzles to be covered with a wire cloth having preferably from 2,000 to 6,000 meshes per cm
  • a wire cloth causes the steam to emerge from a multitude of little orifices, and thus the intended turbulence effect to occur within very small areas, which is important for a uniform penetration of thick fiber tows.
  • a too high speed of the steam flow would prevent such a turbulence effect.
  • the speed of the steam flow should therefore be below 15 m/sec, preferably below 5 m/sec.
  • a sufficient amount of steam must be supplied in order to heat the tow. This is achieved by dimensioning the total surface of the nozzles as large as possible.
  • the speed of the conveyor belt running horizontally below the heating box is adapted to the feed of the tow in such a manner that, considering the very important shrinkage in length occurring during the crimp development, the tow is deposited on the conveyor belt without tension and with only a feeble frill.
  • the subsequent setting of the crimp is carried out with hot air. It is especially favorable to allow the tow to let off the steam from the crimp development zone as completely as possible before it enters the setting zone. Therefore, the distance between the heating box and the setting oven should be from 1 to 2 m, which distance enables the conveyed tow to let off the steam carried along without cooling too much; the time being from 3 to 10 seconds, preferably from 4 to 5 seconds. Thus, the tow arrives at the setting oven in a dry and preheated state. Setting is carried out at a temperature in the range of from to 210C, preferably from to 180C.
  • the high temperature in the setting oven causes high shrinkage of the highly crimped monofilaments. This shrinkage, as well as the pronounced three-dimensional crimp, cause adhesion of the fiber tow on the conveyor belt. Therefore, it is necessary to take off the tow from the conveyor belt in an upward direction by means of a pair of rollers before a subsequent further processing.
  • the combination of devices in accordance with the invention has the advantage of allowing a heat treatment of a tensionfree tow which enables the development of crimp also at very feeble crimp forces, even in the case where a considerable shrinkage in length of the tow amounting to more than 50 percent goes along with the crimp process.
  • the combination of devices in accordance with the present invention allows the fully continuous manufacture of helically crimped filaments or fibers from the correspondent undrawn spinning material.
  • An equipment for the continuous development of the latent crimp and for setting the developed crimp of fiber tows made from synthetic linear high molecular weight polymers which comprises a draw-off device (1), a guide device (2), a heating box (3) mounted in a line-of-fall-distance of at least 50cm, preferably of at least cm, from guide device (2), and having slit nozzles (4) and heated walls (5), which wall heating avoids condensation of steam on the walls, furthermore a horizontally moving conveyor belt (6), another heating box (7) for the after-setting of the crimped fiber tow, and a draw-off device (8).
  • heating box (3) has a height of from 5 to 50 cm and a depth of from 14 to 18 cm.
  • nozzles (4) are concentric double nozzles, the slits of which being staggered by 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US00248853*7A 1971-05-03 1971-05-03 T for the continuous crimp development of three-dimensionally crimped synthetic fibers and filaments Expired - Lifetime US3785017A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712121674 DE2121674A1 (de) 1969-06-03 1971-05-03 Vorrichtung zum kontinuierlichen Auslösen der Kräuselung an dreidimensional gekräuselten synthetischen Fasern und Fäden

Publications (1)

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US3785017A true US3785017A (en) 1974-01-15

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US00248853*7A Expired - Lifetime US3785017A (en) 1971-05-03 1971-05-03 T for the continuous crimp development of three-dimensionally crimped synthetic fibers and filaments

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US (1) US3785017A (ro)
AT (1) AT330937B (ro)
BE (1) BE782972R (ro)
CA (1) CA970547A (ro)
CH (1) CH537472A (ro)
ES (1) ES402188A1 (ro)
GB (1) GB1390644A (ro)
IT (1) IT1001480B (ro)
LU (1) LU65281A1 (ro)
RO (1) RO59237A (ro)
ZA (1) ZA722908B (ro)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4009513A (en) * 1976-02-02 1977-03-01 Andersen Bjorn A Production of warp of textured yarns of uniform properties
US4010529A (en) * 1974-12-23 1977-03-08 Rhone-Poulenc-Textile Method and apparatus for treating yarns
US4021520A (en) * 1973-03-17 1977-05-03 Hoechst Aktiengesellschaft Process for the manufacture of filament yarn having protruding filament ends
US4083091A (en) * 1972-11-29 1978-04-11 Akzona Incorporated Method for developing bulk in a strand of synthetic textile yarn
US4204301A (en) * 1978-04-26 1980-05-27 Greentex Incorporated Strand handling system and method therefor
US4268941A (en) * 1978-05-19 1981-05-26 Vepa Aktiengesellschaft Process for the continuous shrinking of yarns
US4955117A (en) * 1987-03-17 1990-09-11 Milliken Research Corporation Apparatus for hot air bulking of synthetic yarn
EP1798319A1 (en) * 2005-12-19 2007-06-20 Sergio Zamattio Method for bulking a strip of textile material, related device and strip of textile material thus obtained

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099064A (en) * 1961-04-13 1963-07-30 Eastman Kodak Co Method and apparatus for making rug yarn
US3425107A (en) * 1965-10-11 1969-02-04 Kanebo Ltd Apparatus for developing crimps by heating composite filament
UST875021I4 (en) * 1969-08-18 1970-06-23 High modulus polyethylene terephthalate fibers
US3644968A (en) * 1968-12-31 1972-02-29 Ici Ltd Apparatus for relaxing yarns

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099064A (en) * 1961-04-13 1963-07-30 Eastman Kodak Co Method and apparatus for making rug yarn
US3425107A (en) * 1965-10-11 1969-02-04 Kanebo Ltd Apparatus for developing crimps by heating composite filament
US3644968A (en) * 1968-12-31 1972-02-29 Ici Ltd Apparatus for relaxing yarns
UST875021I4 (en) * 1969-08-18 1970-06-23 High modulus polyethylene terephthalate fibers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083091A (en) * 1972-11-29 1978-04-11 Akzona Incorporated Method for developing bulk in a strand of synthetic textile yarn
US4021520A (en) * 1973-03-17 1977-05-03 Hoechst Aktiengesellschaft Process for the manufacture of filament yarn having protruding filament ends
US4010529A (en) * 1974-12-23 1977-03-08 Rhone-Poulenc-Textile Method and apparatus for treating yarns
US4009513A (en) * 1976-02-02 1977-03-01 Andersen Bjorn A Production of warp of textured yarns of uniform properties
US4204301A (en) * 1978-04-26 1980-05-27 Greentex Incorporated Strand handling system and method therefor
US4268941A (en) * 1978-05-19 1981-05-26 Vepa Aktiengesellschaft Process for the continuous shrinking of yarns
US4955117A (en) * 1987-03-17 1990-09-11 Milliken Research Corporation Apparatus for hot air bulking of synthetic yarn
EP1798319A1 (en) * 2005-12-19 2007-06-20 Sergio Zamattio Method for bulking a strip of textile material, related device and strip of textile material thus obtained

Also Published As

Publication number Publication date
GB1390644A (en) 1975-04-16
IT1001480B (it) 1976-04-20
AT330937B (de) 1976-07-26
ZA722908B (en) 1973-06-27
ATA378772A (de) 1975-10-15
CA970547A (en) 1975-07-08
ES402188A1 (es) 1975-11-01
BE782972R (fr) 1972-11-03
LU65281A1 (ro) 1973-11-22
RO59237A (ro) 1976-02-15
CH537472A (de) 1973-05-31

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