US3770866A - Drawing polyester filaments using as a snubing means a heated roller driven at the feed rate speed - Google Patents

Drawing polyester filaments using as a snubing means a heated roller driven at the feed rate speed Download PDF

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US3770866A
US3770866A US00215383A US3770866DA US3770866A US 3770866 A US3770866 A US 3770866A US 00215383 A US00215383 A US 00215383A US 3770866D A US3770866D A US 3770866DA US 3770866 A US3770866 A US 3770866A
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filaments
roller
feed
filament
rollers
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K Sakata
Y Asada
Y Okamura
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Teijin Ltd
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Teijin Ltd
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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
    • 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
    • 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
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching

Definitions

  • a process for drawing polyester filaments which comprises drawing undrawn filaments of polyester containing at least 85 mol percent of ethylene terephthalate units between plural, heated feed rollers and at least one drawing roller rotating at a peripheral speed higher than that of the feed rollers, the improvement residing in the features that the peripheral speeds of all feed rollers are substantially the same, at least the last feed roller is given a small diameter of 15 to 50 mm., and the arc of contact of the filaments on said roller is made at least 180, whereby the drawing point is fixed on said roller.
  • This invention relates to a process for drawing polyesterfilaments. More particularly, the invention relates to a process for drawing polyester filaments in which the drawing point is fixed, and filament breakage and wrapping of the broken filaments around the drawing rollers are reduced, the resulting drawn filaments exhibiting uniform tensile strength, uniform elongation and little fiuffs.
  • the most conventionally employed means for drawing polyester filaments comprises the provision of a fixed heating means such as a heated snubbing pin or plate, between the feed roller and drawing roller, and drawing the filaments by fixing the drawing point on said pin or plate.
  • a fixed heating means such as a heated snubbing pin or plate
  • This method is quite effective when the denier of the filaments to be drawn is light and the drawing rate is low, but when filaments of heavy deniers are to be drawn, it is difiicult to heat uniformly the entire filaments across the cross-section, and consequently filament breakage and wrapping of the broken filaments around the drawing roller during drawing operation increase, which causes uneven distribution of physical properties and fluff formation in the drawn filaments.
  • the defects in the firstmentioned method are generally removed, but new problems such as shifting in drawing point, containing of undrawn portions in drawn filaments, wrapping of the broken filaments onto the drawing roller during drawing operation, occurrence of filament breakage and flufis, increase of unevenness in tensile strength, elongation of the drawn filaments, etc. are brought about.
  • new problems such as shifting in drawing point, containing of undrawn portions in drawn filaments, wrapping of the broken filaments onto the drawing roller during drawing operation, occurrence of filament breakage and flufis, increase of unevenness in tensile strength, elongation of the drawn filaments, etc.
  • the object of the present invention is to provide a process for efi'ectively drawing polyester filaments without using fixed heating means, in which the drawing point is not mobile but fixed, and such troubles as drawing, monofilament coiling around the drawing roller, occurrence of filament breakage and fluffs, etc. are eliminated.
  • Another object of the present invention is to provide an economically advantageous process whereby polyester filaments of heavy deniers can be effectively drawn, free of the aforementioned drawbacks.
  • the smaller feed roll or rolls must of course be positively driven rather than rotating freely.
  • the draw point of undrawn yarn is fixed effectively on the smaller diameter roll, and there is less breaking of the yarn by positively driving the smaller diameter roll and making the peripheral speed of the smaller diameter roll equal to that of the large diameter feed rolls. If the peripheral speeds are not equal, for example if the smaller diameter roll is allowed to rotate freely, the draw point varies and considerable yarn breakage occurs. This is shown later on in a comparative example. Such a defect can be obviated with the present invention.
  • the present invention is characterized in that, while drawing thermoplastic, synthetic filaments between plural, heated feed rollers rotating at substantially the same peripheral speed and at lease one drawing roller rotating at a higher peripheral speed than the feed rollers, a small diameter, i.e. 15 to 50 mm., is given at least to the last feed roller, and the filaments are contacted on said roller to be deflected at least 180 of arc, to fix the drawing point on said roller.
  • undrawn filaments of polyester containing at least mol percent of ethylene terephthalate units are drawn between plural, heated feed rollers rotating at substantially the same peripheral speed, and at least one drawing roller rotating at a peripheral speed higher than that of the feed rollers, the quantity of finishing agent applied to the undrawn filaments is adjusted to 0.05 to 0.6 wt. percent, at least the last of the heated feed rollers is given a small diameter of 15 to 50 mm., and the filaments are contacted on the small diameter roller to be deflected at least of arc, whereby the drawing point is fixed on said small diameter roller.
  • the ratio of the diameter of the large feed rolls to that of the small feed rolls should be within the range 1.6-40z1.
  • undrawn filaments of polyester containing at least 85 mol percent of ethylene terephthalate units and having an intrinsic viscosity (calculated from the measured value in o-chlorophenol at 35 C.) of preferably at least 0.75 are (a) drawn between plural, heated feed rollers rotating at substantially the same peripheral speed and at least one drawing roller rotating at a peripheral speed higher than that of the feed rollers, the finishing agent pick-up of the undrawn filaments is adjusted to 0.05 to 0.6 wt.
  • At least the last of the heated feed rollers is given a diameter of 15 to 50 mm.
  • the surface temperature of the small diameter roller is maintained at 60-110 C.
  • the filaments are contacted on the small diameter roller to be deflected at least 180 of arc, and the draw ratio is adjusted to between 2.5 and 5.5 times, and (b) thus drawn filaments are further drawn by at least 1.1 times between said drawing roller and another drawing roller rotating at a peripheral speed higher than that of the first drawing roller, whereby polyester filaments well suited for industrial use are provided.
  • FIG. 1 is a diagrammatic side view for illustrating the arrangement of feed rollers and drawing rollers in an apparatus used for practicing the present invention
  • FIG. 2 is similar to FIG. 1, except that a finishing agentapplying means is provided between the feed rollers and drawing rollers.
  • FIG. 3 is an explanatory drawing of the drawing mechanism of the subject process.
  • FIG. 4 is a diagrammatic side view showing the arrangement of various rollers in an apparatus for practicing the multi-stage drawing in accordance with the invention.
  • FIG. 1 shows an embodiment of drawing filaments with an apparatus comprising plural, heated feed rollers and plural drawing rollers, in which the undrawn filament 1 is passed in zig-zag form on the five heated feed rollers 2a2e driven at a same peripheral speed and a small diameter feed roller 3 driven at the same peripheral speed as rollers 2a-2e and heated to the same temperature level as of the feed rollers 2a-2e, and the filament is then drawn by the four drawing rollers 4a4d which are driven at a peripheral speed greater than that of the feed rollers.
  • the draw ratio normally ranges 3 to 7 times. In multi-stage drawing, it is preferred to effect the first stage drawing at a draw ratio of 2.5 to 5.5 times, and to make the total draw ratio 3 to 7 times.
  • an oiling roller for applying finishing agent, etc. may be provided before the drawing roller 4a, as illustrated in FIG. 2.
  • At least the last roller 3 among the plural feed rollers is given a small diameter of to 50 mm. as illustrated in the drawings.
  • the undrawn filament 1 must be contacted on the small diameter feed roller 3 to be deflected at least 180 of arc.
  • the drawing point cannot be fixed on said roller but is moved to the undrawn filaments-feeding side, to increase the occurrence of filament breakage and wrapping of the broken filaments around the drawing roller, making the smooth drawing operation difiicult.
  • heated feed rollers must be provided preceding the small diameter roller or rollers to secure the sufficient heating of the filaments. Such can be secured by setting the contact time of the filaments with the surfaces of the heated rollers within the range of l to 10 seconds.
  • plural feed rollers of relatively large diameters, such as above mm. are provided to effect sufficient heating.
  • the small diameter feed roller is preferably provided close to the larger diameter, heated feed rollers, preferably within the distance of 50 mm., so as to prevent cooling of the filaments.
  • the surface temperatures to be given to the feed rollers are variable depending on such factors as the type of polyester filaments to be drawn, filament size, travelling speed of the filaments, etc., but generally temperatures around or over the second transition point of the polyester forming the filaments are conveniently employed. Particularly preferred temperatures range from 60 to (3., especially 65l00 C. When many feed rollers are used, the feed roller group may contain a few number of unheated rollers, so far as the sufiicient heating of undrawn filaments is secured.
  • the surface of the small diameter feed roller is suitably given a mirror surface finish in order to prevent filaments from slipping thereon as well as to fix a drawing point thereon, but in certain cases it may be given a matte finish.
  • Only one, or plural drawing rollers may be used. All the heated feed rollers and drawing roller or rollers are suitably driven forcedly.
  • the finishing agent pick-up of the undrawn filaments 1 is preferably controlled to 0.050.6 wt. percent to the Weight of undrawn filaments.
  • finishing agent is applied to the filaments to be drawn, during the spinning or immediately before the drawing step, in order to prevent accumulation of static charge and to improve filament bundling property as well as drawability.
  • the finishing agent pick-up on the undrawn filaments is normally controlled to be at least 1.0 wt. percent in case of polyester filaments. However, in the preferred embodiment of the subject process, it is reduced to such minor amount as at most 0.6 wt. percent.
  • the drawing point can be fixed on the small diameter feed roller 3 with in creased certainty, compared with the case when more than 0.5 percent by weight of the finishing agent is applied.
  • the filament breakage and wrapping of the broken filaments around the drawing roller can be further decreased to effect still smoother drawing. Accordingly, in this embodiment of the invention, uneven distribution in tensile strength, and elongation of drawn filaments are also further reduced.
  • the type of the finishing agent to be applied onto the undrawn filaments in the subject process may be any which has been conventionally employed in the spinning or drawing step of polyester filaments.
  • Those finishing agents are applied to the filaments in the optional, conventionally employed form such as the oily state, emulsion, solution, etc., while the finishing agent pick-up referred to in the present specification is the weight percent of the finishing agent itself, per the filaments weight.
  • the finishing agents pick-up to such minor amount as 0.05 to 0.6 wt. percent, either the finishing agent of the specified amount is applied to the undrawn filaments, or the once applied excessive amount of finishing agent may be squeezed out of the filaments preceding the drawing.
  • the finishing agent pick-up on the undrawn filaments is as little as at most 0.6 wt. percent according to the invention, the drawn filaments tend to accumulate static electric charge, exhibit deteriorated bundling property, or form loops. Therefore, it is a preferred practice to apply a suitable amount of finishing agent to the filaments after the drawing (in case of multi-stage drawing, after the first stage drawing) but before winding, to prevent occurrence of such troubles.
  • the finishing agent to be applied onto the filaments after drawing is not necessarily the same as that applied to the undrawn filaments.
  • epoxy compound, isocyanate compound, etc. may be applied to the filaments at the optional point between the drawing and winding, so as to improve their adhesion with rubber.
  • the subject process is particularly effective for multistage drawing of undrawn filaments to make high tenacity filaments for industrial use.
  • FIG. 4 shows one example of such multi-stage drawing, in which the undrawn filament 1 is subjected to the first stage drawing between the heated feed rollers 2a- 2d, small diameter, heated feed rollers 3a, 3b, and the first stage drawing rollers 4a-4d.
  • the diameter of the small size feed roller 3b 15 to 50 mm., and the arc of contact of the filaments on the roller 3b, at least 180.
  • the surface temperature of the heated feed rollers 2a-2d and that of the small diameter, heated feed rollers 3a, 3b should range from 60 to 110 C.
  • the first stage draw ratio should range from 2.5 to 5.5 times (preferably 3.5-5.0 times).
  • the first-stage drawn filaments are further drawn at least 1.1 times, preferably 1.2-1.7 times, by second stage drawing between the first stage drawing rollers 4a- 4d and second stage drawing rollers 7a-7j.
  • the filaments are preferably heated to approximately 120- 300 C. during the second. stage drawing.
  • a slit heater is suitable for eliminating its friction with the running filaments to enable high speed drawing.
  • an oiling roller 5 for applying a finishing agent to the filaments is suitably provided.
  • second-stage drawn filaments are then heattreated between the second stage drawing rollers 711-7 and driven rollers 9a-9e, in a stretched, constant length, or shrunk state ranging from 1.2 to 0.8 times the length before the heat treatment.
  • the heating means 8 in that case may be a slit heater similar to that employed in the second stage drawing.
  • the atmospheric temperature in the slit ranges 120-300 C.
  • polyester undrawn filaments employed in the invention are composed of high molecular polyester containing at least mol percent, preferably mol percent, of a recurring structural unit of the formula,
  • the undrawn filaments may be those which are spun by optional spinning means conventionally employed.
  • polyester is used in the specification and claims, in the sense including modified polyethylene terephthalate by the addition of no more than approximately 15 mol percent of other ester-forming units.
  • ester-forming units the following may be named by way of examples; diethylene glycol, other polymethylene glycol of 1-10 carbons, hexahydro-p-xylylene glycol; aromatic dicarboxylic acids such as isophthalic, dibenzoic, p terphenyl-4,4"-dicarboxylic, and hexahydroterephthalic acids; aliphatic acid such as adipic acid; hydroxy acid such as hydroxyacetic acid; and the like.
  • the properties of the undrawn filaments are not critical, but the filaments having an intrinsic viscosity of at least 0.3, preferably at least 0.75 and a birefringence rang ing 00005-00120 are preferred.
  • the undrawn filaments having a birefringence outside the specified range tend to produce drawing failure or increase filament breakage during drawing operation.
  • the density of the undrawn filaments is preferably no higher than 1.35 g./cm. Otherwise the filament breakage during dravw'ng tends to be inreased.
  • filaments to be drawn may have optional crosssectional configuration, such as a circle and other modified forms.
  • subject drawing process is applicable to any of multifilaments and tows for staple fibers, while it is particularly effective for drawing undrawn filaments of heavy deniers such as above 2,000 deniers, at high draw ratios.
  • the drawing point can be fixed. Consequently the resulting drawn filaments have uniform tensile strength and elongation and little fluffs, providing high quality products. Furthermore, filaments breakage as well as wrapping of the broken filaments around the drawing roller are reduced to improve production efiiciency.
  • Intrinsic viscosity of a polymer is given as a norm of degree of polymerization of that polymer, which is defined below:
  • viscosity obtained by dividing the viscosity of a dilute solution of a polymer by the viscosity of solvent employed which is measured at the same temperature. Also is the polymer concentration in the solution expressed by g./ 100 cc.
  • the intrinsic viscosities given in the present specification are calculated from the values measured at 35 C., using ortho-chlorophenol as the solvent.
  • the load-elongation curve and breaking strength and breaking elongation calculated from the curve are variable in shape and value according to the length of test specimen and extension rate.
  • the tensile test is performed with 20-cm. long samples at an extension rate of 50 percent/ min. under standard conditions (20 C., relative humidity of 65%), using an Instron tensile tester.
  • EXAMPLE 3 Tows of polyethylene terephthalate undrawn filaments having an intrinsic viscosity of 0.62, birefringence of 526 l0- monofilament denier of 5 de. and total denier of 1,600,000 de. were drawn with the apparatus illustrated in FIG. 1.
  • the feed rollers Zia-2E each had a diameter of 300 mm. and surface temperature of 75 C., and the small diameter feed roller 3 was given a surface temperature of also 75 C., while its diameter and the arc of contact of the filaments on it were varied in each run.
  • the draw ratio employed in the experiments was 3.9 times, and the drawing speed was 100 m./min.
  • hTe finishing agent pick-up on the undrawn filaments was 0.5% by weight of the filaments.
  • the feed rollers 2a-2e were each given a diameter of 300 mm. and surface temperature of 73 C., and the small diameter feed roller 3, a diameter of mm. and surface temperature of 73 C.
  • the are of contact of the filaments on the small diameter feed roller 3 was 190.
  • the finishing agent pick-up on the undrawn filaments applied at the spinning step was varied in each run.
  • the draw ratio was TAB LE 1 Amount of broken filament Drawing Diameter
  • the are wrapped around point varia- Filament Strength Elongation of roller 3 of contact drawing roller 1 tion range I breakage 5 distribution distribution (mm) (g./hr.) (mm.) (times/day) (g.lde.) (percent) Remarks gonvleptional process- 300 180 0. 24 l:22 3. 8 6. 105:0. 6 29. 81:4. 8 Control.
  • Amount of broken filaments wrapped around drawing roller means the measured amount of the filaments broken and wrapped around the drawing roller during drawing operation expressed by the unit of gram per hour.
  • Polyethylene terephthalate-adipate undrawn filaments (3.0 mol percent of ethylene adipate was copolymerized) having an intrinsic viscosity of 0.80, birefringence of 200 l0- monofilament denier of 25 de., and total denier of 6250 de. were applied with 0.45% of a finishing agent, drawn by 4.2 times with the apparatus illustrated in FIG. 1, and further drawn by 1.4 times in a slit heater at 200 0, followed by a shrinkage of 5% in a 3.6 times, and drawing rate was 100 m./min. The results were as given in Table 3 below.
  • EXAMPLE 4 Polyethylene terephthalate-adipate undrawn filaments (3.0 mol percent of ethylene adipate was copolymerized) having an intrinsic viscosity of 0.78, birefringence of 183 10- monofilament denier of 25 de., total denier of 5840 de., and finishing agent pick-up of 0.45 wt. percent were drawn with the apparatus illustrated in FIG. 4.
  • the feed rollers 2a-2d were each given a diameter of 250 mm., surface temperature of 70 C., and the small diameter feed rollers 3a and 3b, the diameter of 20 mm. and surface temperature of 70 C.
  • the are of contact of the filaments on the small diameter feed roller 3b was 540.
  • the draw ratio in the first stage drawing was 4.3 times, that in the the resulting drawn filaments showed little non-uniformity in tensile strength and elongation.
  • COMPARATIVE EXPERIMENT TABLE 4 Amount of The are of broken filament Diameter contact of wrapped around of feed filamentson Drawingpoint second stage Filament Strength Elongation roller the feed variation drawin roller breakage distribution distribution 3b (mm.) roller 3b range (mm.) g./de.) (times/day) (g./de.) percent Remarks 20 540 0 0 0. 1 9. 1510.2 11. 9; ⁇ ;0. 4 Subject process. 20 150 5 0.09 3.0 8.9
  • 0.4 11. 91120.6 Control. 55 540 16 0. 12 3. 6 8. 7;l;0. 5 11. 5:
  • EXAMPLE 5 ratio employed was 4.0 and the drawing speed was 172 Polyethylene terephthalate undrawn filaments having an intrinsic viscosity of 0.92, birefringence of 200x l0 monofilament denier of 21.8 de., total denier of 5,430 de., and finishing agent pick-up of 0.40 wt. percent drawn with the same a paratus as employed in Example 4.
  • the surface temperature of feed rollers 2a-2d, 3a and 3b was 80 C.
  • the arc of contact of the filaments on the small diameter feed roller 3b was 190
  • the draw ratio in the first stage drawing was 4.0 times
  • that in the second stage drawing was 1.4 times
  • intra-slit temperature of the slit heater 6 was 200 C.
  • drawn filaments were heat-treated in a slit heater 8 which was heated to maintain the intra-slit temperature at the third stage treatment m./min.
  • the large and smaller feed rollers 2a-2e, 3 were positively driven at a peripheral speed of 43 m./min.
  • the drawn filaments were further drawn by 1.4 times in a slit heater at 200 C., followed by shrinking by 9% in a slit heater at 210 C.
  • a freely rotatable roller was employed instead of the smaller positively driven feed roller, with the freely rotatable roller having the same diameter and temperature as the smaller feed roller, the draw point variation became remarkable, and objectionable wrapping around the drawing rollers, fuzz formation, and filament breakage tended to occur much more frequently. The results are shown below.
  • the draw point was shifted toward the large feed rollers. at 210 C., under a shrinkage of 3%.
  • variation in drawing point was substantially nil, and the filaments exhibited excellent drawability.
  • a process for drawing an undrawn polyester filament containing at least mol percent ethylene terephthalate units which comprises feeding the filament between plural feed rollers of substantially equal diameter with a surface temperature of 60-110 C. and positively driven at substantially the same peripheral speed, contacting the filament with at least one smaller feed roller, positively driven by means other than the filament at substantially the ame peripheral speed as the plural feed rollers and having a diameter of 15-50 mm.
  • the ratio of the diameter of the plural feed rollers to the diameter of the smaller feed roller being between 1.621 and 40:1, and passing the filament onto at least one drawing roller rotating at a peripheral speed higher than that of the feed rollers to draw the filament at a draw ratio between 2.521 and 5.5 :1, whereby the draw point is fixed on the last smaller feed roller.
  • polyester has an intrinsic viscosity as measured in orthochlorophenol at 35 C. of at least 0.75.
  • a process for drawing an undrawn polyester filament containing at least 85 mol percent ethylene terephthalate unit which comprises feeding the filament between plural feed rollers of substantially equal diameter with a surface temperature of 60-110 C. and positively driven at substantially the same peripheral speed, the filament having a finishing agent thereon in an amount of 0.050.6% by weight of the filament, contacting the filament with at least one smaller feed roller, positively driven by means other than the filament at substantially the same peripheral speed as the plural feed rollers and having a diameter of 15-50 mm.
  • polyester has an intrinsic viscosity as measured in ortho-chlorophenol at 35 C. of at least 0.75.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00215383A 1969-02-03 1972-01-04 Drawing polyester filaments using as a snubing means a heated roller driven at the feed rate speed Expired - Lifetime US3770866A (en)

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BR (1) BR7016550D0 (de)
CA (1) CA949713A (de)
DE (1) DE2004558B2 (de)
GB (1) GB1292381A (de)
NL (1) NL7001501A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4112668A (en) * 1976-10-04 1978-09-12 Monsanto Company, St. Louis, Missouri Method for treating polyester filaments
US4356690A (en) * 1978-03-24 1982-11-02 Toray Industries, Inc. Fasciated yarn
US4814122A (en) * 1983-12-01 1989-03-21 Barmag Ag Method for processing a warp sheet of yarns
US4950539A (en) * 1986-10-24 1990-08-21 Viscosuisse Sa Product and method of producing a smooth polyester yarn
US5106685A (en) * 1987-10-13 1992-04-21 Rhone-Poulenc Viscosuisse Sa Process for manufacturing a smooth polyester yarn and yarn so obtained
US20140018513A1 (en) * 2011-03-31 2014-01-16 Kolon Industries, Inc. Preparation method for drawn poly (ethyleneterephthalate) fiber, drawn poly (ethyleneterephthalate) fiber, and tire cord
CN109997184A (zh) * 2016-11-28 2019-07-09 Jxtg能源株式会社 无纺布制吸声材料

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4112668A (en) * 1976-10-04 1978-09-12 Monsanto Company, St. Louis, Missouri Method for treating polyester filaments
US4356690A (en) * 1978-03-24 1982-11-02 Toray Industries, Inc. Fasciated yarn
US4667463A (en) * 1978-03-24 1987-05-26 Toray Industries, Inc. Process and apparatus for making fasciated yarn
US4814122A (en) * 1983-12-01 1989-03-21 Barmag Ag Method for processing a warp sheet of yarns
US4868959A (en) * 1983-12-01 1989-09-26 Barmag Ag Apparatus for processing a warp sheet of yarns
US4905355A (en) * 1983-12-01 1990-03-06 Barmag Ag Apparatus for processing a warp sheet of yarns
US4950539A (en) * 1986-10-24 1990-08-21 Viscosuisse Sa Product and method of producing a smooth polyester yarn
US5106685A (en) * 1987-10-13 1992-04-21 Rhone-Poulenc Viscosuisse Sa Process for manufacturing a smooth polyester yarn and yarn so obtained
US20140018513A1 (en) * 2011-03-31 2014-01-16 Kolon Industries, Inc. Preparation method for drawn poly (ethyleneterephthalate) fiber, drawn poly (ethyleneterephthalate) fiber, and tire cord
US9457528B2 (en) * 2011-03-31 2016-10-04 Kolon Industries, Inc. Preparation method for drawn poly (ethyleneterephthalate) fiber, drawn poly (ethyleneterephthalate) fiber, and tire cord
CN109997184A (zh) * 2016-11-28 2019-07-09 Jxtg能源株式会社 无纺布制吸声材料

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GB1292381A (en) 1972-10-11
DE2004558A1 (de) 1970-11-26
BR7016550D0 (pt) 1973-02-22
CA949713A (en) 1974-06-25
DE2004558B2 (de) 1975-03-27

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