[go: up one dir, main page]

US3083412A - Multi-stage drawing of nylon filaments - Google Patents

Multi-stage drawing of nylon filaments Download PDF

Info

Publication number
US3083412A
US3083412A US113836A US11383661A US3083412A US 3083412 A US3083412 A US 3083412A US 113836 A US113836 A US 113836A US 11383661 A US11383661 A US 11383661A US 3083412 A US3083412 A US 3083412A
Authority
US
United States
Prior art keywords
filaments
yarn
zone
temperature
nylon
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
US113836A
Other languages
English (en)
Inventor
Edmond P Brignac
Paul E Sikorski
Robert T Wright
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.)
Monsanto Chemicals Ltd
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL279147D priority Critical patent/NL279147A/xx
Application filed by Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to US113836A priority patent/US3083412A/en
Priority to GB20626/62A priority patent/GB964393A/en
Priority to CH657062A priority patent/CH415944A/fr
Priority to FR899204A priority patent/FR1324071A/fr
Priority to BE618364A priority patent/BE618364A/fr
Priority to DK243262AA priority patent/DK104638C/da
Priority to DE19621435542 priority patent/DE1435542A1/de
Application granted granted Critical
Publication of US3083412A publication Critical patent/US3083412A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D02J1/228—Stretching in two or more steps, with or without intermediate steps
    • 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
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • 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
    • Y10S425/017—Filament stretching apparatus

Definitions

  • This invention relates to drawing nylon filaments in multi-stages. More particularly, the invention relates to a method for the multi-stage attenuation of nylon filaments to improve the physical properties thereof.
  • Nylon filaments have made a substantial penetration into the tire cord market and other end uses, wherein high tenacity is a demanded property.
  • One of the former drawbacks to the use of nylon cord-containing tires for passenger cars was the tendency of such tires to increase undesirably in size during normal use conditions.
  • hot-stretch processes and apparatus have been developed and used during the past few years.
  • Various arrangements have been proposed for thermally conditioning nylon filaments during the drawing thereof to impart higher tenacity thereto.
  • the hot-stretch procedures have given rise to concomitant problems.
  • One of the problems is that the frequency of breakage of the individual filaments, as well as breakage of the whole threadline, notably increases where attempts are made to obtain higher strength levels by means of the known hot-stretch processes.
  • Nylon filaments capable of being molecularly oriented such as freshly spun filaments or as spun filaments, are fed longitudinally to a first stretch zone at a predetermined rate and are withdrawn therefrom at a predetermined increased rate so that the filaments are stretched to increase the molecular orientation thereof.
  • the draw ratio employed in the first zone is determined by the overall draw ratio and the draw ratio employed in the second stretch zone.
  • the overall draw ratio i.e., the number obtained by dividing the speed of the yarn fed to the first zone into the speed of the yarn leaving the second zone, generally will not exceed 6.1 but should be sufiicient for the filaments to have a tenacity of at least 8.5 grams per denier.
  • the overall draw ratio will be 5.0-6.0.
  • the filaments are snubbed so that there is a tendency of the point of necking down of the filaments to be localized, such as by the use of a snubbing pin, roll. or the like.
  • the yarn temperature in the first zone should be about 2085 C.
  • the partially oriented filaments are heated immediately upon their exit from the said first zone to a temperature of about 160-490 C. The heat is applied while the filaments are maintained at substantially constant length.
  • the filaments are subjected to a draw ratio of about 1.2 to 1.9 in a second stretch zone simultaneously while the filaments are being cooled.
  • the product of the draw 3,083,4l2 Patented Apr. 2, 1963 ratio of the first zone and the draw ratio of the second zone will equal the overall draw ratio.
  • the filaments should not be snubbed during this second drawing and are stretched to a highly oriented state. Then, the filaments are quickly quenched by suddenly cooling the drawn filaments to a temperature at least 60-90 C. below the elevated temperature obtained by the filaments between the first and second stretch zones. Thereafter, the filaments are taken up in an orderly manner by conventional means.
  • One form of apparatus for stretching the filaments in the multi-stage operation herein described includes suitable means for supplying molecularly orientablc filaments from a source at a predetermined rate.
  • a first yarn forwarding means is provided in the yarn path and is adapted to forward the yarn at a speed such that the yarn is attenuated a predetermined extent between the supplying means and the forwarding means.
  • Disposed in the yarn path therebetween is a yarn suubber to apply a predetermined resistance to the forward movement of the yarn so that the point of stretching of the filaments is localized.
  • a heating element is associated with the yarn forwarding means so that the yarn is heated to a predetermined elevatcd temperature.
  • a second yarn forwarding means is provided in the yarn path and is adapted to be operated at a predetermined increased rate as compared with the rate of the first yarn forwarding means so that the yarn becomes fully stretched.
  • the second forwarding means has a heat conducting surface for dissipating the heat from the yarn quickly. Means is provided so that the second forwarding means is cooled.
  • the amount that one draws the filaments in the first stretch zone is important, since the filaments before being subjected to the subsequent steps should exhibit some increased degree of molecular orientation as compared with the orientation of the filaments as spun. Increasing the molecular orientation of the filaments in the first zone, when carried to extremes, hinders the filaments from accepting the benefits in regard to tenacity and yarn quality bestowed by the subsequent steps of the method. If the orientation of the filaments is not suificient, the same hindrance is present. As indicated above, the amount of draw in the first zone is ordinarily computed once the overall draw ratio and the draw ratio in the second stretch zone have been selected.
  • the ambient temperature in the first zone can be that ordinarily employed in the conventional single stage cold-drawing of nylon filaments. At the point Where the yarn is snubbed the temperature can be about 20-85 0., although the preferred temperature range is 35-80" C. Necking down of the filaments ordinarily occurs in the yarn path just beyond the point where the filaments are snubbed.
  • the filaments After being stretched in the first zone, the filaments are continuously heated to a temperature above the glass transition temperature but not higher than 30 C. below the melting temperature of the polymer.
  • the preferred temperature is in the range of -190 C. The most satisfactory range is ISO- C.
  • One preferred embodiment of the invention comprises heating the partially oriented filaments with dry heat, such as by passing them over a heated surface in contacting engagement therewith. For example, this can be accomplished by passing the filaments across a heated surface and draw roll a plurality of times.
  • the primary purpose of the draw roll is to transport the filaments across a heated surface and to maintain enough tension on the threadline to urge contact of the filaments with the heated surface. Multiple passes are desired to allow the heat to permeate the filaments fully.
  • the filaments While heated are maintained at substantially constant length and under considerable tension. That is to say, the filaments are not stretched a large extent while they are heated.
  • the filaments should not be attenuated more than 8 :rcent during the heating stage.
  • the filaments By being heated while restrained to substantially constant length, the filaments will be hcat-set.
  • the hentingsetting action is only a partial one; and hence, the time during which the filaments are heated at substantially constant length is important. The time can be from about 0.05 to 0.80 second, preferably from 0.20 to 0.50 second.
  • the filaments are stretched in a second stretch zone.
  • the draw ratio employed in the second stretch zone is about 1.2l.9, preferably l.41.6.
  • the yarn is cooled. This ordinarily can be accomplished by stretching the yarn in air at about room temperature or at some temperature notably below the temperature reached by the filaments when they were heated. An ambient temperature of 20-85 C. is quite satisfactory.
  • the filaments are quenched quicltly.
  • the post quenching is quite important to the practice of the invention.
  • cooling is accomplished by passing the yarn over a heat conducting roll which functions as a heat sink.
  • the temperature of the filaments should be reduced to a temperature at least 60-90 C. below the temperature attained by the filaments in the heating step.
  • the yarn can be cooled quickly by suitable means to a temperature of about -110 C., preferably 30-80 C.
  • the yarn is thereafter taken up in an orderly manner.
  • FIGURE 1 is a schematic view in perspective with principal parts in location illustrating one arrangement of apparatus suitable for stretching nylon filaments in the two stage operation of the invention.
  • FIGURE 2 is a perspective view on a larger scale illustrating a heat dissipating roll different from that shown in FIGURE 1.
  • Yarn 10 to be stretched and composed of a bundle of smooth substantially parallel filaments that have not been fully oriented is supplied from a yarn source.
  • the yarn source can be, for example, yarn package 11 previously dolled from a conventional spinning machine.
  • the apparatus can readily be adapted for processing continuous filament yarn which is supplied directly from the spinning machine without an intermediate take up.
  • Yarn 10 is passed over and around one end of bobbin 12 or other yarnholdcr.
  • the yarn 10 is threaded conventionally around snubbing bar 13 which functions as a simple, uncomplex tensioning device to assist in maintaining an orderly and uniform supply of yarn.
  • the yarn 10 is passed through a yarn guide 14, if needed, and then to a rotatably arranged thread advancing means 15 that is adapted to supply yarn to the first stretch zone A at a first delivery speed.
  • Means 15 can comprise a pair of feed rolls, at least one of which is positively driven. The rolls engage each other to nip the yarn sufficiently.
  • the pin is mounted to be non-rotativc and has a. smooth yarn contact surface made of resistant to wear material.
  • the yarn 10 After being passed around pin 16 a desired number of times, the yarn 10 is directed around rotatably mounted feed roll 17 and its associated separator roll 18 which is freely rotatably mounted.
  • Roll 17 is positively driven at a peripheral speed such that the yarn is given a predetermined stretch between the roll 17 and means 15 which defines the stretch zone A.
  • a heater block 20 Mounted between the roll 17 and roll 13 is a heater block 20 providing a source of dry heat for raising the temperature of the yarn while it slides across the surface of the block.
  • the heating of the block can be achieved in a suitable manner, e.g., by internal electric resistant heating.
  • the yarn is led around the periphery of a cooling roll 21 and its associated separator roll 22.
  • the peripheral speed of roll 21 is faster than the peripheral speed of roll 17 so that the yarn is stretched a predetermined amount therebctween in the stretch zone B.
  • roll 21 is provided with internal vanes 23. During rotation of this roll, the vanes will propel air from the atmosphere through the inside of the roll. As indicated above, the roll is made of a heat conducting substance. Hence, heat conducted from the yarn will be carried from the roll by the movement of the air therethrough.
  • nozzle 24 is connected to a source of cool compressed air or other fluid coolant.
  • the nozzle extends interiorly of roll 21 and is curved at its end to direct the coolant inside the roll.
  • the yarn after being cooled quickly is taken up in a conventional manner by a suitable form of a package building apparatus such as a ring twisting assembly which comprises a bobbin 25 adapted to be rotated by driven belt 26 to form a package 27.
  • the assembly further includes a vertically reciprocated ring 28 carrying a traveller 29 adapted to revolve freely around the bobbin 25 as the yarn is twisted a desired amount and wound thereon.
  • nylon-66 polyhcxamethyleneadipamide
  • nylon-11 polyhcxamethyleneadipamide
  • nylon 4 nylon 6, nylon 610, nylon 11
  • fiber-forming copolymers e.g., 6/66, 6/610/66, 66/610, etc.
  • Nylon as is well known, has recurring intralincar carbonarnide groups as an integral part of the main molecular chain.
  • a filament nylon-66 yarn with a spun denier of 4250 was pulled from a spin cake bobbin by means of a drawtwister feed and top-cot roll assembly and fed to and around a first stage drawing pin.
  • the pin temperature was 38 C.
  • the draw ratio was 3.82 in this first stage.
  • the threadline was heated then by being passed over a heater block at C. disposed between a draw roll and an accessory separator roll. Multiple threadline wraps were made around the roll-heater block assembly to raise the yarn temperature to about 170 C. while the yarn was maintained at substantially constant length.
  • the yarn was then drawn in a second stage at a draw ratio of 1.5 which was accomplished by running a larger draw roll with a peripheral yarn speed 1.5 times the peripheral speed of the smaller draw roll.
  • the yarn was then cooled by running multiple wraps around the larger draw roll and separator roll assembly.
  • the larger draw roll was heat conductive and was intcriorly vaned so that heat was dissipated therefrom.
  • the temperature of the vancd roll was approximately 50 C. Filament breakage and wrap formation were almost non-existent under the above conditions; and the resulting drawn yarn had a tenacity of 10.2 grams per denier and an elongation of 12.8%.
  • the overall drawing speed was yards per minute, and the overall draw ratio was 5.73.
  • EXAMPLE II By using the apparatus illustrated in FIGURE 1, a 140 filamcnt nylon-66 yarn with a spun denier of 4710 was stretched in two stages with intermediate heating. After the second stage, the yarn was quickly cooled. In this instance the snubbing pin temperature was 46 C., and the draw ratio was 3.94 in the first stage. The heater block had a temperature of 182 C. The second stage draw ratio was 1.5. The temperature of the vaned draw roll was 55 C. The take-up speed was 466 yards per minute.
  • the yarn had a tenacity of 8.6 grams per denier and an elongation of 12.0%.
  • EXAMPLE III In a known manner wherein nylon filaments are stretched in two stages, freshly formed multifilament nylon-66 yarn was advanced through the first stage. The pin temperature in this stage was 35 C. Then, the yarn was led through the second stage in which the yarn passed around a second snubbing pin and then over the heating surface of a hot block operated at a temperature of 180 C. The overall draw ratio was 5.7, and the draw ratio in the second stage was 1.5. The final denier of the yarn was 776; the tenacity thereof was 9.9; and the elongation thereof was 12. 1. While the tenacity and elongation were quite satisfactory, the yarn had so many filament breaks that many packages of the yarn had to be rejected as being substandard.
  • EXAMPLE IV As a control, freshly formed multifilament nylon-66 yarn was drawn in the known manner described in Example II. The yarn performance was compared with the performance obtained by processing the yarn in acoordance with the present invention. Various overall draw ratios and block temperatures were employed as indicated in the table below. The first stage draw ratio was 1.5 in each instance.
  • the openability of the process is excellent; and one is able to employ high overall draw ratios with a small number of thread breaks per pound of yarn drawn.
  • Conventional drawing equipment can be employed with only minor modifications thereof. Other advantages may be noted.
  • a process for treating nylon filaments comprising the steps of longitudinally feeding nylon filaments capable of being molecularly oriented to a first stretch zone at a predetermined rate, withdrawing the said filaments from said first zone at a predetermined increased rate, whereby the filaments are attenuated therein, snubbing the movement of said filaments through the said first zone so that there is a tendency of the point of the necking down of the filaments to be localized, the temperature of the filaments when snubbed being about 20-85 C., heating the filaments upon their exit from the said first zone to a temperature about loll-190 C., the heat being applied while the filaments are maintained at substantially constant length, and for a period of time of about 0.05 to 0.80 second, immediately thereafter attenuating the heated filaments an additional amount in a second stretch zone while cooling the filaments and without snubbing thereof in the said second zone, then quickly quenching the filaments at a temperature at least 60-90 C.
  • the overall draw ratio employed being not more than 6.1 but being sufiicient for the filaments to have a high tenacity and the draw ratio employed in the second stretch zone being about 1.2-1.9.
  • a process for treating nylon filaments comprising the steps of continuously longitudinally feeding freshly spun nylon filaments capable of being molecularly oriented to a first stretch zone at a predetermined rate, continuously withdrawing the said filaments from said first zone at a predetermined increased rate, whereby the filaments are stretched therein to increase the orientation thereof, continuously snubbing the movement of said filaments through the said first stretch zone so that there is a tendency of the point of the necking down of the filaments to be localized, the temperature of the filaments when snubbed being 20-85 C, continuously heating the filaments upon their exit from the said first stretch zone to a temperature about -190 C., the heat being applied while the filaments are maintained at substantially constant length and for a period of time of about 0.05 to 0.80 second, immediately thereafter continuously attenuating the heated filaments an additional amount in a second stretch zone while at the same time cooling the filaments and without snubbing thereof in the said second zone, then continuously quickly quenching the filaments at a temperature at least 60-90 C.
  • a process for treating nylon filaments comprising the steps of continuously feeding freshly spun nylon filaments capable of being molecularly oriented to a first stretch zone at a predetermined rate, continuously withdrawing the said filaments from said first stretch zone at a predetermined increased rate, whereby the filaments are stretched therein to increase the molecular orientation thereof, continuously snubbing the movement of said filaments through the said first stretch zone so that there is a tendency of the point of the necking down of the filaments to be localized, the temperature of the filaments when snubbed being 3580 C., continuously heating the filaments upon their exit from the said first stretch zone with a dry heat source by passing the filaments over the heat source in contacting engagement therewith whereby the temperature of the filaments is raised to about 180- 185 C., the heat being applied while the filaments are maintained at substantially constant length and for a period of time of 0.20 to 0.50 second, immediately thereafter attenuating the heated filaments an additional amount in a second stretch zone while at the same time cooling the filaments and without sn

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
US113836A 1961-05-31 1961-05-31 Multi-stage drawing of nylon filaments Expired - Lifetime US3083412A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL279147D NL279147A (fr) 1961-05-31
US113836A US3083412A (en) 1961-05-31 1961-05-31 Multi-stage drawing of nylon filaments
GB20626/62A GB964393A (en) 1961-05-31 1962-05-29 Two stage drawing of nylon filaments
FR899204A FR1324071A (fr) 1961-05-31 1962-05-30 Procédé perfectionné de traitement des filaments en polyamides
CH657062A CH415944A (fr) 1961-05-31 1962-05-30 Procédé perfectionné d'étirage des filaments en polyamides
BE618364A BE618364A (fr) 1961-05-31 1962-05-30 Procédé perfectionné de traitement des filaments en polyamides
DK243262AA DK104638C (da) 1961-05-31 1962-05-30 Fremgangsmåde til to-trins-strækning af nylongarn.
DE19621435542 DE1435542A1 (de) 1961-05-31 1962-05-30 Verfahren zum Behandeln von Polyamidfaeden

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US113836A US3083412A (en) 1961-05-31 1961-05-31 Multi-stage drawing of nylon filaments

Publications (1)

Publication Number Publication Date
US3083412A true US3083412A (en) 1963-04-02

Family

ID=22351789

Family Applications (1)

Application Number Title Priority Date Filing Date
US113836A Expired - Lifetime US3083412A (en) 1961-05-31 1961-05-31 Multi-stage drawing of nylon filaments

Country Status (7)

Country Link
US (1) US3083412A (fr)
BE (1) BE618364A (fr)
CH (1) CH415944A (fr)
DE (1) DE1435542A1 (fr)
DK (1) DK104638C (fr)
GB (1) GB964393A (fr)
NL (1) NL279147A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301934A (en) * 1963-06-18 1967-01-31 Hercules Inc Process for drawing polypropylene yarn
US3914835A (en) * 1974-01-14 1975-10-28 Dow Badische Co Apparatus for drawing and crimping synthetic yarn

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263187A (en) * 1977-06-08 1981-04-21 Chute Challoner R Shaped articles of polypyrrolidone and method of preparation thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533013A (en) * 1949-04-27 1950-12-05 Du Pont Method and apparatus for the twostage draw of synthetic funicular structures

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533013A (en) * 1949-04-27 1950-12-05 Du Pont Method and apparatus for the twostage draw of synthetic funicular structures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301934A (en) * 1963-06-18 1967-01-31 Hercules Inc Process for drawing polypropylene yarn
US3914835A (en) * 1974-01-14 1975-10-28 Dow Badische Co Apparatus for drawing and crimping synthetic yarn

Also Published As

Publication number Publication date
BE618364A (fr) 1962-11-30
DK104638C (da) 1966-06-13
DE1435542A1 (de) 1968-11-28
NL279147A (fr)
CH415944A (fr) 1966-06-30
GB964393A (en) 1964-07-22

Similar Documents

Publication Publication Date Title
US3311691A (en) Process for drawing a polyamide yarn
US2953428A (en) Production of polychlorotrifluoroethylene textiles
US4035464A (en) Process for the production of polyamide-6 filament yarns
JP2564646B2 (ja) ポリエステル繊維の製造方法
US20220251733A1 (en) Process for the Production of a Low-Shrinkage Aliphatic Polyamide Yarn
US4374797A (en) Process for the production of high strength yarns by spin-stretching and yarns produced by the process, especially from polyamide-6 and polyester filaments
US3287888A (en) Apparatus for the treatment of synthetic filaments
US3124632A (en) Phocess for treating nylon
JP2017519918A (ja) 完全延伸された合成糸を製造する方法および装置
US3400194A (en) Process for making high-tenacity, low elongation industrial yarn
US3083412A (en) Multi-stage drawing of nylon filaments
US3041706A (en) Apparatus for processing cold-drawable textile filaments
US3481136A (en) Process for producing polyester yarn
US3489832A (en) Continuous spinning and drawing of polycaproamide yarn
US3837156A (en) Process for producing molecularly oriented, textured continuous filaments
US3551549A (en) Stretching nylon filaments in a gas vortex
US3662440A (en) Process for controlling yarn tension and threadline stability during high speed heat treating of the yarn
EP0089912A2 (fr) Procédé pour la fabrication de fil polyester à haute résistance
CN1050392C (zh) 制造由聚合物特别是聚酰胺、聚酯或聚丙烯组成的人造长丝束或人造纤维的方法和设备
KR100267601B1 (ko) 폴리에스테르 방사의 제조 방법 및 장치
KR100394932B1 (ko) 고강도 고수축성 폴리아미드66 필라멘트사의 제조방법
JP5984929B2 (ja) Ｈｍｌｓ糸の製造方法及び装置
US3608299A (en) Process for producing torque stretch yarns
US3761556A (en) The manufacture of bulked yarn
US3493646A (en) Drawing and heat relaxing nylon yarn