US2934400A - Process of manufacturing fibers of polyethylene terephthalate - Google Patents

Process of manufacturing fibers of polyethylene terephthalate Download PDF

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Publication number
US2934400A
US2934400A US589354A US58935456A US2934400A US 2934400 A US2934400 A US 2934400A US 589354 A US589354 A US 589354A US 58935456 A US58935456 A US 58935456A US 2934400 A US2934400 A US 2934400A
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United States
Prior art keywords
tow
filaments
tension
polyethylene terephthalate
fibers
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Expired - Lifetime
Application number
US589354A
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English (en)
Inventor
Siggel Erhard
Macura Karl
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.)
Glanzstoff AG
Vereinigte Glanzstoff Fabriken AG
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Glanzstoff AG
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Publication date
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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
    • D02G1/127—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes including drawing or stretching on the same machine
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G1/00—Severing continuous filaments or long fibres, e.g. stapling
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/28—Stretching filaments in gas or steam
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching
    • 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
    • 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
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/04—Polyester fibers
    • 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
    • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
    • Y10S8/21—Nylon

Definitions

  • This invention relates to a process of manufacturing fibers of polyethylene terephthalate, and is particularly applicable to manufacturing staple fibers of polyethylene terephthalate.
  • a staple fiber is to be manufactured from a polyamide
  • filaments of the polyamide twisted into a continuous cable are progressively stretched at increased temperature, Washed and subsequently dried, and then crimped at an increased temperature, after which the cable is cut into staple lengths.
  • Another process for manufacturing staple fibers which is applicable to regenerated cellulose or polyamides, strongly twists the freshly spun, still plastic. threads so that the resulting twist can be fixed by washing, steaming, etc., followed by an untwisting and subsequent cutting of'the cable or filaments into staple lengths.
  • the polyamide filaments are stretched at an elevated temperature, cooled while-still under tension in a gas or air current or by spraying with water, then cut into staple lengths, after which the cut fibers are treated with hot water to produce-a crimped characteristic in the staple fiber.
  • One object of this invention is to provide a process of manufacturing fibers of polyethylene terephthalate in' which the individual filaments are uniformly stretched to give a substantially uniform. cross-section and also tensile strength.
  • Another object of the invention is to provide. a process. 7
  • Still another object of the invention is to provide a process of manufacturing fibers of polyethylene terephthalate which will result in staple fibers having a substantially uniform cross-section and capable of being dyed with a uniform shade of color.
  • fibers of polyethylene terephthalate can be manufactured in an advantageous manner by the in corporation of particular steps into the usualprocess for producing such fiber.
  • a plurality of continuous filaments of polyethylene terep thalate are spun and collected into a continuous cable, tow, strand, yarn, bundle or the like and then stretched for orientation of the fibers in the presence of a steam stretching step is particularly useful when taken in combination with subsequent steps for the production of a staple fiber of polyethylene terephthalate.
  • a staple fiber, product having highly uniform qualities is thusobtained by a process which includes spinning a plurality of continuous filaments of polyethylene terephthalate from the melt, collecting these filaments into a continuous tow,, applying a uniform moisture content on the tow of from. 4-lO% by weight of dry cable, stretching the. tow with. this moisture content in the presence of steam. for. fiber. orientation, washing the stretched tow in a hot aqueous: bath under tension to remove adherent spin finish, and; to provide shrink resistance in subsequent steps, subjects ing the tow to a finishing treatment in which the filaments.
  • the inventive features of the new process are more clearly set forth by the following description of a process of manufacturing staple fibers wherein a continuous tow is cut into staple lengths. It is to be understood, however, that particular features of the invention are equally applicable to the production of continuous filaments of polyethylene terephthalate.
  • the process for the production of staple fibers of polyethylene terephthalate begins With spinning a plurality of continuous filaments of polyethylene terephthalate from the melt. The spinning of the fibers or filaments is accomplished in the usual manner by extruding the molten polyester through a spinneret and solidifying the spun filaments.
  • any number of filaments e.g., from 300 to 200,000 filaments, can be spun at the same time and are collected together to form a tow of filaments.
  • the filaments of the freshly spun polyester are non-oriented so that the tow has a low denier and high extensibility; e.g., the tow may be characterized as being from 300 filaments, 18,000 denier to 200,000 filaments, 1,104,000 denier.
  • this stretching step can be accomplished in a much improved manner according to the invention by applying a uniform water moisture content to the tow of from 440% by weight of dry tow.
  • the necessary quantity of water is applied before the tow enters into the steam atmosphere of the stretching zone, preferably by spraying water through a suitable nozzle or the like onto the tow.
  • a greater amount of water than l% by weight of dr tow is to be avoided, and, therefore, the quantity of water applied to and absorbed by the tow must be carefully controlled.
  • the quantity of water required for spraying on the tow naturally depends on the speed of the tow as it passes through the spray and also upon its thickness. Ordinarily, water should not be applied to the tow by passing the tow through a water bath since this method of application is not easily controlled.
  • Spraying water on the tow essentially results in the application of a uniform water jacket along the length of the tow.
  • the absorbed moisture content protects the unstretched tow against overheating and a tendency to become thermoplastic.
  • the uniform moisture content also promotes an even or uniform heating of the individual filaments so I at a uniform stretching can take place. Furthermore, broken or damaged filaments are prevented since the individual filaments do not tend to become thermoplastic.
  • the tension required for drawing or stretching the tow is ordinarily accomplished in the usual manner by a set of rollers, including feed rollers placed before the steam zone and draw rollers placed after the steam zone.
  • the feed rollers also act to homogenize or un formly equalize the moisture content in the tow as it passes over these rollers. It is also possible to provide a separate set of rollers prior to the steam zone in order to ensure an equally distributed moisture content in the tow.
  • the tow In the stretching zone, the tow can be stretched from 3.5 to 5.5 times its original length and is usually stretched about four times its length.
  • the tow is ordinarily stretched less than a tow which is intended for use as continuousfilament fibers.
  • a tow having from 600 filaments, 6300 denier to 100,000 filaments, 1,650,000 denier can be stretched from 3.5 to 5.5 times its original length to produce a tow having from 600 filaments, 1800 denier to 100,000 filaments, 300,000 denier.
  • the tow After stretching, the tow should contain a water moisture content of more than 0.5 and preferably more than 2%.
  • the tow then passes in continuous operation into a hot aqueous bath, preferably maintained at a temperature of from about 60 to 90 C. Spin finish which still adheres to the tow is removed in the aqueous bath. It has been found to be highly advantageous to subject the tow to a definite tension during washing in the hot aqueous bath, sufiicient tension being applied to prevent shrinkage caused by increased temperatures in subsequent steps of the process. Also, if the tow is passed through this bath without the application of tension, high shrinkage tends to occur in the bath itself resulting in uncontrolled changes in the physical characteristics and particularly .in the cross-sectional area of the filaments.
  • the tension applied to the tow in the bath is particularly important in preventing shrinkage in a subsequent crimping step which is especially accompanied by an increase in temperature.
  • a tension of from about 0.5 g./den. to 2 g./den. is sufiicient to prevent shrinkage in a subsequent crimping step, the amount of tension naturally depending upon the size and number of filaments.
  • the tow After washing and prior to crimping, the tow is subjected to a finishing treatment in which the filaments are given a thermally insulating coating in order to avoid overheating the filaments with resulting thread damage in the crimping operation.
  • the finishing treatment for this purpose is Well known in the art and can be accomplished, e.g., by passing the tow through a bath of such finishing materials as polyethylene glycolester of high molecular fatty acids.
  • Other finishing agents may also be applied to the tow during this stage of the process for various purposes as are well known in the art.
  • the tow is crimped so that the individual filaments have a wavy, crinkled, or bent configuration.
  • Various methods of crimping polyethylene terephthalate fibers are well known in the art and any suitable method may be employed, e.g., by passing the tow througha series of rollers which bend the fibers at short intervals along their length.
  • the crimped tow is then' dried in the absence of tension to a moisture content of about 0.5% and preferably less than 0.5%.
  • the finishing agents previously applied to the tow cause the individual filaments to stick or adhere together. If the tow were immediately cut into staple lengths (as has been the customary procedure prior to this invention), it would then be necessary to subject the staple lengths of fiber after cutting to an additional opening operation before the staple fibers could be used in many textile applications.
  • a highly advantageous feature of the present invention resides in subjecting the dried tow to at least two tension steps prior to cutting the tow into staple lengths. These tension steps cause the individual filaments to separate or detach from each other due to the resilience of the crimped fibers.
  • the lighter preliminary tension can be applied by any suitable means such as braking the tow as it changes its direction of travel over rigid rollers spaced about four meters apart so that the tension lasts about /2 second.
  • a second increased tension is then applied, preferably by means of a pair of rollers which operate at a slower speed than the feed mechanism for the cutting operation.
  • This second tension also lasts for a short length of time, and is constant for a continuous tow having uniform characteristics. It is preferable to provide suitable means for adjusting the tension in order to accommodate tows and filaments of various sizes or thickness and other characteristics.
  • the amount of tension applied should be suflicient to detach the individual filaments from each other, depending upon the desired opening of the resulting fleece. At the same time, the detached filaments should hang together well in spite of their separation, the crimped nature of the filaments aiding in this function.
  • the loosely associated filaments are cut into staple lengths, e.g., from 3.1 cm. to 12 cm., by. any suitable cuttingmechanism.
  • Fig. 2 is a perspective diagrammatic view of the watercoated filaments of the tow in the steam atmosphere of the stretching zone 4.
  • Example Polyethylene terephthalate is melted and spun through a 250 hole spinneret 1 according to common processes.
  • the filaments were collected into a continuous tow 2 of 54,000 filaments.
  • the tow has a titre of about 1,000,000 denier.
  • This tow is loaded with a moisture content of 6% by weight of the dry tow by spraying with water from spray nozzles 3 and is then led into the stretching zone 4 in which a steam atmosphere is present (overheated steam of 130 (3.).
  • the cable is stretched to 4.5 times its original length by means of feed rolls 5 and draw rolls 6 so that after the stretching-process has been finished the tow possesses a titre of about 162,000 denier.
  • FIG. 2 of the drawing diagrammatically illustrates a segment of the tow in stretching zone 4 wherein the individual filaments 17 of the tow are stretched in the presence of an atmosphere of steam 19, while the filaments are coated with a film of water 18.
  • the stretched tow still under tension, is then led into an aqueous bath 7 which is heated to 85, to remove adherent spin liquor, subjected under tension to a finishing treatment at 70 C.
  • the finishing bath 8 consists of a polyethylene glycol ester of high molecular fatty acids.
  • the tow is continuously led to a turbo-crimper 9 in order to be crimped and is then fixed under reduced tension in the presence of hot steam in zone 10.
  • the tow is dried in zone 11 in the absence of tension, subjected to at least two short tension steps and led to the cutting apparatus for cutting it into staple lengths of 100 mm. fiber.
  • the first tension step is accomplished by running the tow zigzag through a series of staggered bars functioning as a brake 12 on the running tow. Ihe tow runs over a series of deflection rollers and a dancer roller 13 to a driven roller pair 14. The dancer roller 13 compensates for variations in tension imparted to the tow section running between brake 12 and the roller pair 14.
  • the second tension step is provided by operating the clamping rollers 15 of the cutting device 16 at a higher drawing-off speed than the peripheral speed of the roller pair 14.
  • the improvement which comprises spinning and then solidifying molten polyethylene terephthalate into a continuous tow of from 200 filaments, 18,000 denier, to 200,000 filaments, 1,104,000 denier, applying a uniform coating of water to the tow of from 4 to 10% by weight of dry tow prior to stretching, and subsequently stretching the substantially non-oriented filaments of the tow having said pre-applied coating of water in the presence of steam for fiber orientation.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US589354A 1955-03-19 1956-03-19 Process of manufacturing fibers of polyethylene terephthalate Expired - Lifetime US2934400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV8662A DE1033841B (de) 1955-03-19 1955-03-19 Verfahren zur Herstellung von gekraeuselten Stapelfasern aus Polyaethylenterephthalat-Fadenkabeln

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US2934400A true US2934400A (en) 1960-04-26

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US (1) US2934400A (fr)
BE (1) BE545456A (fr)
CH (1) CH340308A (fr)
DE (1) DE1033841B (fr)
FR (1) FR1141839A (fr)
NL (1) NL102982C (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259681A (en) * 1962-04-27 1966-07-05 Ici Ltd Polyester filaments
US3324061A (en) * 1962-01-15 1967-06-06 Minnesota Mining & Mfg Preparing aqueous solutions of polypyrrolidone
US3413397A (en) * 1961-08-17 1968-11-26 Eastman Kodak Co Process for stretching polypropylene filaments
US3414648A (en) * 1964-08-24 1968-12-03 Du Pont Drawing and crimping tows of asymmetrically birefringent polyester filaments
US3418160A (en) * 1965-05-14 1968-12-24 Du Pont Process for coating polyester fibers with a mixture of lanolin and an oily silicone
US3422492A (en) * 1965-02-23 1969-01-21 Heplon Inc Apparatus for stretching and crimping fibers
US3520069A (en) * 1968-01-29 1970-07-14 Meier Windhorst Christian A Process and apparatus for wash-and-wear finishing of woven cloths,knitted goods or fiber fleeces of cellulose fibers
US3549740A (en) * 1966-12-14 1970-12-22 Du Pont Treatment of polyester fibers to improve adhesion of rubber
US3594870A (en) * 1967-04-01 1971-07-27 Barmag Barmer Maschf Apparatus for the production of filaments from foils
US3832435A (en) * 1970-07-03 1974-08-27 Hoechst Ag Process for the manufacture of crimped fibers and filaments of linear high molecular weight polymers
US3859042A (en) * 1972-07-31 1975-01-07 Allied Chem Continuous jet pressure steaming of solid state polymerized polyester filaments with less than 22 meg/kg cooh and an intrinsic viscosity of at least .75 dl.
US3963678A (en) * 1974-06-17 1976-06-15 E. I. Du Pont De Nemours And Company Large denier polyethylene terephthalate monofilaments having good transverse properties
US3993805A (en) * 1972-07-31 1976-11-23 Concorde Fibers Inc. Method of applying liquid finish composition to filaments
US4098864A (en) * 1976-02-18 1978-07-04 The Firestone Tire & Rubber Company Steam drawing of polyester monofilament to improve loop strength and resistance to fibrillation
US4251481A (en) * 1979-05-24 1981-02-17 Allied Chemical Corporation Continuous spin-draw polyester process
US4291470A (en) * 1979-05-25 1981-09-29 Baxter Travenol Laboratories, Inc. Method for preshrinking semipermeable membranes
EP0125112A2 (fr) * 1983-05-04 1984-11-14 E.I. Du Pont De Nemours And Company Procédé pour la thermofixation de filaments de polyester et filaments ainsi préparés
EP0691424A3 (fr) * 1994-06-08 1996-04-17 Filteco Spa Procédé et dispositif pour la fabrication de fils etirés
US6544462B1 (en) * 1998-03-31 2003-04-08 Ube Nitto Kasei Co., Ltd. Drawing method
US20040032049A1 (en) * 2001-01-05 2004-02-19 Gerrit Ruitenberg Method for spin stretching extruded threads

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332485A (en) * 1941-09-02 1943-10-19 Dow Chemical Co Vinylidene chloride fibers
US2377810A (en) * 1942-10-30 1945-06-05 Dow Chemical Co Crinkled polymeric vinylidene chloride fibers
US2394540A (en) * 1943-08-20 1946-02-12 Du Pont Stretching of artificial yarn
US2395396A (en) * 1942-09-25 1946-02-26 Du Pont Thermal stretching of cellulose derivative yarn
US2542973A (en) * 1948-09-18 1951-02-27 Dow Chemical Co Method of making crinkled fibers
US2615784A (en) * 1949-12-20 1952-10-28 Du Pont Polyethylene terephthalate monofils drawn and heat set for use as bristles
US2733122A (en) * 1951-11-30 1956-01-31 vixvi o
US2734794A (en) * 1951-07-12 1956-02-14 G cm-ton

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332485A (en) * 1941-09-02 1943-10-19 Dow Chemical Co Vinylidene chloride fibers
US2395396A (en) * 1942-09-25 1946-02-26 Du Pont Thermal stretching of cellulose derivative yarn
US2377810A (en) * 1942-10-30 1945-06-05 Dow Chemical Co Crinkled polymeric vinylidene chloride fibers
US2394540A (en) * 1943-08-20 1946-02-12 Du Pont Stretching of artificial yarn
US2542973A (en) * 1948-09-18 1951-02-27 Dow Chemical Co Method of making crinkled fibers
US2615784A (en) * 1949-12-20 1952-10-28 Du Pont Polyethylene terephthalate monofils drawn and heat set for use as bristles
US2734794A (en) * 1951-07-12 1956-02-14 G cm-ton
US2733122A (en) * 1951-11-30 1956-01-31 vixvi o

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413397A (en) * 1961-08-17 1968-11-26 Eastman Kodak Co Process for stretching polypropylene filaments
US3324061A (en) * 1962-01-15 1967-06-06 Minnesota Mining & Mfg Preparing aqueous solutions of polypyrrolidone
US3259681A (en) * 1962-04-27 1966-07-05 Ici Ltd Polyester filaments
US3414648A (en) * 1964-08-24 1968-12-03 Du Pont Drawing and crimping tows of asymmetrically birefringent polyester filaments
US3422492A (en) * 1965-02-23 1969-01-21 Heplon Inc Apparatus for stretching and crimping fibers
US3418160A (en) * 1965-05-14 1968-12-24 Du Pont Process for coating polyester fibers with a mixture of lanolin and an oily silicone
US3549740A (en) * 1966-12-14 1970-12-22 Du Pont Treatment of polyester fibers to improve adhesion of rubber
US3594870A (en) * 1967-04-01 1971-07-27 Barmag Barmer Maschf Apparatus for the production of filaments from foils
US3520069A (en) * 1968-01-29 1970-07-14 Meier Windhorst Christian A Process and apparatus for wash-and-wear finishing of woven cloths,knitted goods or fiber fleeces of cellulose fibers
US3832435A (en) * 1970-07-03 1974-08-27 Hoechst Ag Process for the manufacture of crimped fibers and filaments of linear high molecular weight polymers
US3859042A (en) * 1972-07-31 1975-01-07 Allied Chem Continuous jet pressure steaming of solid state polymerized polyester filaments with less than 22 meg/kg cooh and an intrinsic viscosity of at least .75 dl.
US3993805A (en) * 1972-07-31 1976-11-23 Concorde Fibers Inc. Method of applying liquid finish composition to filaments
US3963678A (en) * 1974-06-17 1976-06-15 E. I. Du Pont De Nemours And Company Large denier polyethylene terephthalate monofilaments having good transverse properties
US4098864A (en) * 1976-02-18 1978-07-04 The Firestone Tire & Rubber Company Steam drawing of polyester monofilament to improve loop strength and resistance to fibrillation
US4251481A (en) * 1979-05-24 1981-02-17 Allied Chemical Corporation Continuous spin-draw polyester process
US4291470A (en) * 1979-05-25 1981-09-29 Baxter Travenol Laboratories, Inc. Method for preshrinking semipermeable membranes
EP0125112A2 (fr) * 1983-05-04 1984-11-14 E.I. Du Pont De Nemours And Company Procédé pour la thermofixation de filaments de polyester et filaments ainsi préparés
EP0125112A3 (en) * 1983-05-04 1986-08-27 E.I. Du Pont De Nemours And Company Improved process for annealing polyester filaments and new products thereof
TR22997A (tr) * 1983-05-04 1989-01-06 Du Pont Poliester filamentlerin tavlanmasi icin islah edilmis usul ve bu usuluen yeni ueruenleri
EP0691424A3 (fr) * 1994-06-08 1996-04-17 Filteco Spa Procédé et dispositif pour la fabrication de fils etirés
US6544462B1 (en) * 1998-03-31 2003-04-08 Ube Nitto Kasei Co., Ltd. Drawing method
US20040032049A1 (en) * 2001-01-05 2004-02-19 Gerrit Ruitenberg Method for spin stretching extruded threads
US7070723B2 (en) * 2001-01-05 2006-07-04 Diolen Industrial Fibers Bv Method for spin-drawing of melt-spun yarns

Also Published As

Publication number Publication date
DE1033841B (de) 1958-07-10
NL102982C (fr)
FR1141839A (fr) 1957-09-09
CH340308A (de) 1959-08-15
BE545456A (fr)

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