US3084393A - Process for stretching filaments - Google Patents

Process for stretching filaments Download PDF

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Publication number
US3084393A
US3084393A US786317A US78631759A US3084393A US 3084393 A US3084393 A US 3084393A US 786317 A US786317 A US 786317A US 78631759 A US78631759 A US 78631759A US 3084393 A US3084393 A US 3084393A
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United States
Prior art keywords
filament
stretching
filaments
drafting
vibration
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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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US786317A
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English (en)
Inventor
Rodenacker Wolf
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.)
Bayer AG
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Bayer AG
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Filing date
Publication date
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Classifications

    • 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
    • D02J1/227—Control of the stretching tension; Localisation of the stretching neck; Draw-pins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/053—Stretch

Definitions

  • a whole series of processes are known for stretching synthetic filaments or threads and are used in order to produce the best possible orientation of the material, and thus cause it to have a high strength value with either a prescribed or else a lowest possible elongation.
  • Processes in which the properties of the filament are improved under the drafting tension are also known. Examples of such processes are steaming or thermal fixing, either in the drafting zone itself or after stretching.
  • filaments or threads composed of synthetic linear polymers can be improved by subjecting the moving filament to a vibrational stress either during or after the drafting, providing the filament is still under tension.
  • This vibratory stressing causes a change in the length of the filament subjected to tension.
  • This change in length is at all times dependent on the mean length of the filament which is subjected to the stressing by vibration, and also on the frequency of the vibration.
  • a further factor influencing the process is the speed of the travelling filament.
  • FIG. 1 shows an arrangement for carrying out the invention
  • FIG. 2 shows a modification of such an arrangement
  • FIG. 3 shows a comparison of the strength of treated and untreated fibers
  • FIG. 4 shows a comparison of the elongation of treated and untreated fibers.
  • the vibratory stressing can take place in the drafting zone itself or in a subsequent zone where tension occurs, and may be independent of the drafting frame. As will be seen from FIG. 1, the process can be carried out on any of the known drafting frames or after-treating machines.
  • the filament is withdrawn from the top of a bobbin 1, through the thread guide 2, and introduced into the supply mechanism 3, of a drafting frame.
  • the filament travels through the system 4, over the vibrating roller 5, through the drafting roller system 6, and is fed under tension over an identical vibrating roller system 8 into another drafting roller system 7 in order to be Wound on a winding bobbin 9 by means of a traversing mechanism 10.
  • the arrangement of the vibrating roller 5, between a drafting roller system 3 and 6, but without the guide rollers 4 is shown in FIG. 2.
  • This arrangement provides the possibility of the length l, of filament being 'ice changed in a comparatively simple manner.
  • the vibrating roller 5 can be driven by any desired drive means such as for example eccentrics mounted on driving shafts, or vibrating magnets which produce a vibration of c.p.s. in this mains frequency.
  • the number of vibrations can be raised in any desired manner, and with the use of means known per se to within the ultrasonic vibration range.
  • the roller comprising an eccentric or vibratory drive means or other gears, by providing a drafting roller system having a non-uniform drive.
  • a vibratory movement can be impressed on such nozzles, thereby producing the same effect as with the arrangement which has been mentioned.
  • the said stretching can be carried out together with the drafting processes using a constant tension, in contrast to the constant elongation usually employed, providing that the thread-brake device used in the process carries out the vibratory movements.
  • the process may be used for spinning or combined spinning and stretching, in which case the filament is stretched during the spinning.
  • the process generally is suitable for synthetic filaments which require a final stretching after the spinning operation. Examples of some results obtained when carrying out the process are listed in the table below. The values differ one from another by amounts which are of practical interest.
  • the curve of FIG. 3 represents the stability of the strength (S), the curve of FIG. 4 the elongation (E) with respect to the stretching ratio (SR). The comparison is given between the untreated material and the material treated with vibrations with a stroke of 10 mm. at 2800 strokes per minute For equal elongation, a considerable improvement in the strength value is obtained.
  • the step which comprises subjecting said filament to a large number of vibrational stresses during the stretching operation, while coordinating the length of the drafting zone, the speed of the filament therethrough and the vibration frequency, so that any given point on the filament must remain within the drafting zone for a time at least as great as the period of vibration.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
US786317A 1958-01-14 1959-01-12 Process for stretching filaments Expired - Lifetime US3084393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0024808 1958-01-14

Publications (1)

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US3084393A true US3084393A (en) 1963-04-09

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US786317A Expired - Lifetime US3084393A (en) 1958-01-14 1959-01-12 Process for stretching filaments

Country Status (4)

Country Link
US (1) US3084393A (fr)
BE (1) BE574473A (fr)
FR (1) FR1213992A (fr)
GB (1) GB901537A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246055A (en) * 1962-08-17 1966-04-12 Union Carbide Corp Applying ultrasonic vibration to thermoplastic polymers during molding
US3444597A (en) * 1966-12-12 1969-05-20 Dennison Mfg Co Filament type attachment device and manufacture of same
US3474509A (en) * 1966-04-22 1969-10-28 Lowenstein & Sons M Apparatus for stretching fabric
US3499185A (en) * 1967-05-08 1970-03-10 Kalle Ag Roller apparatus for stretching film webs
US3871205A (en) * 1971-08-04 1975-03-18 United States Steel Corp Apparatus for length stabilization of a cable
DE102009009107A1 (de) * 2009-02-16 2010-08-19 Fleissner Gmbh Verfahren und Vorrichtung zum Verstrecken von Kabeln

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1871100A (en) * 1928-05-09 1932-08-09 Celanese Corp Process and apparatus for manipulating textile materials
US2064279A (en) * 1931-01-01 1936-12-15 Celanese Corp Artificial textile material
US2157117A (en) * 1937-02-15 1939-05-09 Du Pont Steam treatment of polyamides
US2174863A (en) * 1937-06-22 1939-10-03 New Process Rayon Inc Fiber treatment
US2189232A (en) * 1937-11-08 1940-02-06 American Nat Company Velocipede construction
US2278888A (en) * 1938-11-02 1942-04-07 Du Pont Artificial structure and process for producing same
US2292905A (en) * 1938-09-30 1942-08-11 Du Pont Artificial filament
US2307846A (en) * 1939-05-06 1943-01-12 Du Pont Production of synthetic structures
US2578899A (en) * 1949-10-22 1951-12-18 Du Pont Superstretching polyester structures
US2666976A (en) * 1950-06-10 1954-01-26 Allied Chem & Dye Corp Synthetic bristle and process for its production
USRE23790E (en) * 1954-02-23 Method and means for control of
US2771635A (en) * 1951-03-14 1956-11-27 Perfogit Spa Apparatus for stretching filaments
US2851732A (en) * 1953-07-14 1958-09-16 Du Pont Split filament bundle at finish roll
US2874410A (en) * 1954-06-30 1959-02-24 Du Pont Apparatus for uniformly drawing a plurality of filaments

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE23790E (en) * 1954-02-23 Method and means for control of
US1871100A (en) * 1928-05-09 1932-08-09 Celanese Corp Process and apparatus for manipulating textile materials
US2064279A (en) * 1931-01-01 1936-12-15 Celanese Corp Artificial textile material
US2157117A (en) * 1937-02-15 1939-05-09 Du Pont Steam treatment of polyamides
US2174863A (en) * 1937-06-22 1939-10-03 New Process Rayon Inc Fiber treatment
US2189232A (en) * 1937-11-08 1940-02-06 American Nat Company Velocipede construction
US2292905A (en) * 1938-09-30 1942-08-11 Du Pont Artificial filament
US2278888A (en) * 1938-11-02 1942-04-07 Du Pont Artificial structure and process for producing same
US2307846A (en) * 1939-05-06 1943-01-12 Du Pont Production of synthetic structures
US2578899A (en) * 1949-10-22 1951-12-18 Du Pont Superstretching polyester structures
US2666976A (en) * 1950-06-10 1954-01-26 Allied Chem & Dye Corp Synthetic bristle and process for its production
US2771635A (en) * 1951-03-14 1956-11-27 Perfogit Spa Apparatus for stretching filaments
US2851732A (en) * 1953-07-14 1958-09-16 Du Pont Split filament bundle at finish roll
US2874410A (en) * 1954-06-30 1959-02-24 Du Pont Apparatus for uniformly drawing a plurality of filaments

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246055A (en) * 1962-08-17 1966-04-12 Union Carbide Corp Applying ultrasonic vibration to thermoplastic polymers during molding
US3474509A (en) * 1966-04-22 1969-10-28 Lowenstein & Sons M Apparatus for stretching fabric
US3444597A (en) * 1966-12-12 1969-05-20 Dennison Mfg Co Filament type attachment device and manufacture of same
US3499185A (en) * 1967-05-08 1970-03-10 Kalle Ag Roller apparatus for stretching film webs
US3871205A (en) * 1971-08-04 1975-03-18 United States Steel Corp Apparatus for length stabilization of a cable
DE102009009107A1 (de) * 2009-02-16 2010-08-19 Fleissner Gmbh Verfahren und Vorrichtung zum Verstrecken von Kabeln

Also Published As

Publication number Publication date
GB901537A (en) 1962-07-18
FR1213992A (fr) 1960-04-05
BE574473A (fr) 1959-05-02

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