EP0087124A2 - Verfahren und Vorrichtung zur Herstellung von falschdralltexturierten, leicht färbbaren Polyestergarnen - Google Patents

Verfahren und Vorrichtung zur Herstellung von falschdralltexturierten, leicht färbbaren Polyestergarnen Download PDF

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Publication number
EP0087124A2
EP0087124A2 EP83101510A EP83101510A EP0087124A2 EP 0087124 A2 EP0087124 A2 EP 0087124A2 EP 83101510 A EP83101510 A EP 83101510A EP 83101510 A EP83101510 A EP 83101510A EP 0087124 A2 EP0087124 A2 EP 0087124A2
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EP
European Patent Office
Prior art keywords
false
yarn
heater
polyester yarn
false twisting
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Granted
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EP83101510A
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English (en)
French (fr)
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EP0087124A3 (en
EP0087124B1 (de
Inventor
Norio Ukai
Katsushige Tomizuka
Tomio Kuriki
Kenji Kamide
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Asahi Kasei Corp
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
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Priority claimed from JP2456182A external-priority patent/JPS58144138A/ja
Priority claimed from JP9851082A external-priority patent/JPS58220829A/ja
Priority claimed from JP13761182A external-priority patent/JPS5930924A/ja
Priority claimed from JP17251882A external-priority patent/JPS5966529A/ja
Application filed by Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Priority to AT83101510T priority Critical patent/ATE47163T1/de
Publication of EP0087124A2 publication Critical patent/EP0087124A2/de
Publication of EP0087124A3 publication Critical patent/EP0087124A3/en
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    • 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
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/0286—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist characterised by the use of certain filaments, fibres or yarns

Definitions

  • This invention relates to a process for producing a false-twisted polyester yarn wherein an as-spun polyester yarn is subjected in succession to heat treatment, cooling and then false twisting or draw-false twisting, and an apparatus for carrying out this process.
  • the present invention relates to a process for producing a false-twisted polyester yarn having a practically sufficient tenacity and a good dyeability, particularly such that the false-twisted polyester yarn is capable of being dyed under normal pressure, wherein a yarn consisting of an as-spun polyester fiber having a mean birefringence index (An) of at least 15 x 10 -3 but less than 150 x 10- 3 , especially one which has been spun at a spinning speed of at least 2,500 m/min but less than 7,000 m/min is subjected to (1) heat treatment, (2) cooling and (3) false twisting or draw-false twisting in succession, and also relates to an apparatus suitable for carrying out this process.
  • An mean birefringence index
  • Polyester fibers are excellent in mechanical and thermal properties and they have been used in not only the field of clothing articles but also the field of industrial materials.
  • the polyester fibers are poor in.the dyeability, and especially, fibers composed of a polyethylene terephthalate homopolymer are difficult to dye and they can be dyed only under a high pressure at a high temperature such as about 130°C.
  • polyester fibers can be improved by compolymerizing polyethylene terephthalate with isophthalic acid having a metal sulfonate group or polyether.
  • these modified polyester fibers still cannot be dyed under normal pressure.
  • a process for the production of a false-twisted polyester yarn which comprises subjecting a yarn consisting of an as-spun polyester fiber having a mean birefringence index (An) of at least 15 x 10 but less than 150 x 10 -3 to (1) heat treatment, (2) cooling and (3) false twisting treatment or draw-false twisting in succession.
  • An mean birefringence index
  • a false twisting apparatus which comprises a feed yarn creel, a false twisting heater and an optional stabilizing heater, a false twisting element and a winder, wherein a heat-treating heater of the non-contact type is arranged upstream of the false twisting heater and between the false twisting heater and the feed yarn creel, at a height substantially equal to the height of the feed yarn creel so that the heat-treating heater confronts the false twisting heater.
  • polyester fiber used in the present invention means not only a fiber made of a polyethylene terephthalate homopolymer but also a fiber made of a copolyester comprising ethylene terephthalate as the main repeating unit component and up to 15% by weight of a third copolymerized component.
  • At least one member selected from isophthalic acid, adipic acid, oxalic acid, trimellitic acid, pyromellitic acid, p-hydroxybenzoic acid, 2,6--naphthalene-dicarboxylic acid, 5-sodium-sulfoisophthalic acid, sebacic acid, azelaic acid and 2,5-dimethyl--terephthalic acid may be used instead of a part of terephthalic acid
  • at least one member selected from diethylene glycol, propylene glycol, 1,4-butanediol, 1,4--dihydroxymethylcyclohexane and polyoxyethylene glycol may be used instead of a part of ethylene glycol.
  • a fiber of a polymer such as mentioned above used in the present invention may comprise additives customarily added to synthetic fibers, such as a delustering agent, an antistatic agent and a stabilizer.
  • the dyeability of a fiber of a polyester comprising main repeating units of ethylene terephthalate and a third copolymerized component as mentioned above is improved over the dyeability of a fiber of a homopolyester of ethylene terephthalate, and the degree of the improvement of the dyeability varies according to the kind of the copolymerized component and the weight proportion thereof.
  • an acid free of an aromatic ring such as adipic acid or sebacic acid
  • an acid having a substituent as a side chain on the aromatic ring gives a higher degree of the improvement of the dyeability than an aromatic ring-containing acid free of such a substituent.
  • a component having a higher molecular weight such as polyoxyethylene glycol
  • a component having a lower molecular weight such as diethylene glycol
  • the larger the weight proportion of the third component the higher the degree of the improvement of the dyeability.
  • the dyeability of a polyester fiber is improved by copolymerization of a third component such as mentioned above, with increase of the proportion of the third component, spinning becomes difficult and the manufacturing cost is increased. Furthermore, the thermal and mechanical properties of the obtained copolyester fiber are lower than those of a fiber of a polyethylene terephthalate homopolymer. Moreover, if the weight proportion of the third copolymerized component exceeds 15%, the melting point is drastically lowered.
  • the melting point of the resulting polyester fiber is 230°C or lower, and the heat resistance is drastically degraded with reduction of the mechanical properties.
  • the weight proportion of the third copolymerized component should be up to 15%, preferably up to 5%, more preferably 0%. Namely, a polyethylene terephthalate homopolymer is most preferred.
  • the polyester yarn used in the present invention is a multifilament yarn consisting of at least two single filaments.
  • the size of the single filament is 0.01 to 10 deniers and the cross-section of the single filament may be either circular or non-circular.
  • An as-spun polyester yarn having a An value of at least 15 x 10 -3 but less than 150 x 10 -3 which is used in the present invention, may be obtained by performing spinning and winding at a spinning speed of at least 2,500 m/min but less than 7,000 m/min, for example, in an apparatus as shown in Fig. 1.
  • reference numerals 1, 2, 3, 4, 5 and 6 represent a spin head, a spinneret, a spun filament being solidified, a fluid sucking device for cooling and sucking a bundle of filaments being solidified, a wound yarn package and a friction roll rotated at a surface speed equal to the winding speed.
  • spinning speed is meant a surface speed of a winding friction roll 6 when the spinning-winding operation is carried out according to the apparatus shown in Fig. 1.
  • the spinning operation conducted at a spinning speed of 7,000 m/min or higher is not advantageous from the industrial viewpoint because the equipment cost of the winding device is increased and close attention should be paid to the control and maintenance of various conditions at the spinning step. At the present, therefore, spinning speeds of less than 7,000 m/min are advantageous.
  • the as-spun polyester yarn having a ⁇ n value of at least 15 x 10 -3 but less than 150 x 10- 3 which is obtained by the above-mentioned spinning operation, is subjected to the heat treatment without passage through any special drawing step prior to the heat treatment.
  • the heat treatment of the present invention is accomplished, for example, by heat-treating the polyester yarn having the above-mentioned An value in a heated tubular heater or slit heater without being contacted with the surface of the heater; passing the yarn through heated air or super-heated steam or allowing the yarn to travel while contacting it with a heated metal plate.
  • the temperature of the heater is adjusted to 190 to 300°C.
  • An optimum heat treatment temperature varies depending upon such factors as the An value of the fiber, the composition of the copolymer, the heat treatment time, the fiber elongation ratio, the fineness of the single filament and the fineness of the yarn.
  • Fig. 3 shows the relationship between the spinning speed (m/min) and the An value of a 35-d/7-f multi-filament yarn having a filament section of a circular shape, which is obtained by spinning a polyethylene terephthalate homopolymer having an intrinsic viscosity of 0.63 dl/g as measured at 35°C in a 2/1 mixed solvent of phenol/tetrachloroethane at various spinning speeds by using the spinning apparatus shown in Fig. 1. From Fig. 3, it is seen that the spinning speed providing a An value of 50 x 10 -3 is about 4,000 m/min and the spinning speed providing a An value of 15 x 10 -3 is about 2,500 m/min.
  • Fig. 3 shows the relationship between the spinning speed (m/min) and the An value of a 35-d/7-f multi-filament yarn having a filament section of a circular shape, which is obtained by spinning a polyethylene terephthalate homopolymer having an intrinsic viscosity of 0.63
  • a polyethylene terephthalate fiber spun at a spinning speed of at least about 4,000 m/min that is, a polyethylene terephthalate fiber having a An value of at least 50 x 10-3, has a Xc value of at least 50%, and the structure of the fiber is substantially completed.
  • a polyethylene terephthalate fiber spun at a spinning speed of at least about 2,500 but less than about 4,000 m/min may be regarded as an incomplete fiber in which the structure of the fiber is being formed. Accordingly, the polyester fiber having a ⁇ n value of at least 15 x 10 -3 but less than 50 x 10 -3 , that is, the polyester fiber spun at a spinning speed of at least about 2,500 but less than about 4,000 m/min, is different from the polyester fiber having a An value of at least 50 x 10- 3 , that is, the polyester fiber spun at a spinning speed of at least 4,000 m/min, and should be drawn at the heat treatment.
  • a polyester fiber having a An value of less than 15 x 10- 3 that is, a polyester fiber spun at a spinning speed of less than about 2,500 m/min, is composed substantially of an amorphous portion and the degree of orientation of the molecule chain is low. Therefore, if this polyester fiber is subjected to the heat treatment according to the present invention, partial fusion is caused and the tenacity and elongation are extremely low.
  • a polyethylene terephthalate homopolymer fiber having a ⁇ n value of at least 50 x 10 -3 has a substantially completed fiber structure
  • the heat-treated fiber comes to have an increased degree of crystallinity and an increased refractive indes. Namely, the fiber structure is more completed. Noreover, the structure of the amorphous region dominating the dyeability of the fiber is relaxed so that the fiber can be dyed even under normal pressure with a disperse dye.
  • the dynamic loss tangent (tan ⁇ )-temperature characteristic is suitable for defining the structure of the amorphous portion.
  • the peak value of tan 6, i.e., (tan ⁇ ) max , in the tan 6-temperature curve is at least 0 .10, the temperature T max at which tan 6 shows a peak is not higher than 115°C, the value of tan 6 at 220°C, i.e., tan ⁇ 220 , is not more than 0.055, the value of c is at least 50% and the value of An is at least 35 x 10 -3 . If a fiber having such parameters is subjected to the false twisting treatment or draw-false twisting treatment, a fiber dyeable under normal pressure can be obtained.
  • the polyester fiber heat-treated according to the process of the present invention is characterized as possessing a (tan ⁇ ) max value of at least 0.10, a T max value not higher than 115°C, a tan ⁇ 220 value not more than 0.055, a Xc value of at least 50% and a An value of at least 3 5 x 10-3, and, if cooling described below is performed, even after the false twisting treatment or draw-false twisting treatment, the polyester fiber can be dyed under normal pressure.
  • the conditions of the heat treatment of an as-spun fiber having a An value of at least 50 x 10 -3 but less than 150 x 10 -3 for obtaining an easily dyeable polyethylene terephthalate fiber having the above-mentioned fine structure are as described hereinbefore, when the fiber is passed through a tubular or slit heater.
  • the heater temperature be 230 to 270°C, more preferably 240 to 260°C
  • the heat treatment time be 0.4 to 1.5 seconds, more preferably 0.6 to 1.3 seconds
  • the elongation ratio be -8 to +3%, more preferably -6 to +1%.
  • the fiber to be heat-treated is a copolyester fiber
  • a temperature lower than the above-mentioned heat treatment temperature by the difference between the melting point of the polyethylene terephthalate fiber and the melting point of the copolyester fiber is adopted for the heat treatment.
  • the melting point of a fiber obtained by copolymerizing polyethylene terephthalate with 5% by weight of isophthalic acid and spinning the copolyester at a spinning speed of 6,000 m/min is 247°C, which is lower by about 10°C than the melting point of a fiber of a polyethlene terephthalate homopolymer.
  • a temperature suitably adopted for the heat treatment in the tubular heater is 230 to 250°C.
  • the melting point of a fiber obtained by copolymerizing polyethylene terephthalate with 12% by weight of isophthalic acid and spinning the copolyester in the same manner as described above is 232°C, which is lower by about 25°C than the melting point of the fiber of a polyethylene terephthalate homopolymer, and a temperature suitable for the heat treatment of the fiber of this copolyester is 215 to 235°C.
  • copolyesters as described above are sensitive to heat, and therefore, in the heat treatment of fibers of these copolyesters, closed attention should be paid ⁇ to the control of the heat treatment temperature.
  • the treatment time and elongation ratio te be adopted for the heat treatment of copolyester fibers may be the same as those adopted for the heat treatment of fibers of a polyethylene terphthalate homopolymer.
  • an ordinary as-spun polyester fiber having a An value of at least 15 x 10 -3 but less than 50 x 10 -3 and consisting of single filaments having a circular section and a size of at least 1 denier is not completed and the ⁇ c value is low.
  • such a fiber should be drawn by 5 to 200% at the heat treatment. If the heat treatment is carried out without effecting this drawing, crystals are not sufficiently grown or developed, and therefore, the fiber is partially fused and the mechanical properties are drastically degraded.
  • the above-mentioned fiber is heat-treated while drawing it by 5 to 200%, fusion of the fiber is not caused, and there is obtained a fiber to be preferably subjected to the false twisting treatment or draw-false twisting treatment in the present invention, in which the (tan ⁇ ) max value is at least 0.10, the T max value is less than 115°C, the tan 6 220 value is less than 0.055, the Xc value is at least 50% and the An value is at least 50 x 10
  • the temperature adopted for heat-treating a polyester fiber spun at a spinning speed of at least 2,500 m/min but less than 4,000 m/min may be the same as the temperature to be adopted for heat-treating a polyethylene terephthalate homopolymer fiber spun at a spinning speed of at least 4,500 m/min.
  • the heat treatment temperature be in the range of 190 to 270°C, more preferably 200 to 260°C.
  • Fig. 5 illustrates the relationship of the treatment time to ( tan 6 ) max and T max values, which is observed when the above-mentioned fiber is heat-treated in the same manner as described above.
  • the numerical values in Fig. 5 represent the heat treatment time (seconds). From Fig. 5, it is seen that with prolongation of the treatment time, (tan ⁇ ) max decreases but T max increases, and that if the treatment time is 0.2 to 0.3 second or longer, (tan ⁇ ) max changes only to a minor extent but T max decreases. Namely, the heat treatment time region of up to 0.2 - 0.3 second is the region causing the structural change conventionally considered to be due to the heat treatment, that is, the region where the structure is made dense by the heat treatment.
  • the heat treatment time is further prolonged beyond the above region, crystals are developed but the amorphous portion is relaxed. This phenomenon is one discovered for the first time by us. Accordingly, in case of a polyester yarn spun at a spinning speed of at least 2,500 m/min but less than 4,000 m/min, it is necessary that the heat treatment time should be longer by at least 0.2 second than the heat treatment time for the polyester yarn spun at a spinning speed of at least 4,000 m/min, and thus, it is preferred that the polyester yarn be'heat-treated for 0.4 to 2.0 seconds.
  • the heat treatment temperature may be lowered according to the proportion of the copolymerized component as described above with respect to the polyester yarn spun at a spinning speed of at least 4,000 m/min.
  • the foregoing heat treatment conditions are those for an ordinary polyester fiber in which the section of the filament has a circular shape and the size of the single filament is at least 1 denier.
  • a polyester fiber having a non-circular section such as a triangular or pentagonal section or a polyester fiber having a circular section but a size smaller than 1 denier
  • the heat treatment temperature may be lowered by about 5 to about 10°C or the treatment time may be shortened by 0.1 to 0.2 second.
  • the heat treatment may also be carried out in super-heated steam or a mixed atmosphere of super-heated steam and hot air.
  • the heat treatment time and the fiber elongation ratio during the heat treatment are the same as in case of the heat treatment conducted in the tubular or slit heater or heated air, but it is preferred that the heat treatment temperature be selected within the range of from (230 - 50Z)°C to (290 - 50Z)°C in which Z stands for the mole fraction of super-heated steam in the heat-treating medium.
  • the as-spun polyester filament yarn having a An value of at least 15 x 10 -3 but less than 150 x 10 -3 may be heat-treated in the twisted state.
  • the twist number be at least 3% of the twist number at the false twisting treatment or draw-false twisting treatment.
  • the twist number T at the false twisting treatment or draw-false twisting treatment is 80 to 120% of in which d represents the denier of the false-twisted yarn, and this twist number is the number of twists present between the false twisting heater and the false twisting element.
  • this twisted polyester yarn may be heat-treated by passing it through the tubular heater without contact with the heater or by passing it through heated air, super-heated steam or a mixture thereof.
  • the spinning speed is at least 4,000 m/min, the resulting yarn may be contacted with the heater during the heat treatment.
  • the contact with a heated metal plate or the like is not preferred because formation of fluffs or local fusion of the fiber cannot be avoided.
  • the heat treatment time can be shortened to about 0.2 second. Accordingly, the length of the heater can be shortened. In this case, if the heat treatment is carried out under no substantial drawing, the dyability is further improved.
  • the means for twisting the yarn in this embodiment there may be adopted a method in which the yarn is twisted before the heat treatment, but, when the false twisting treatment or draw-false twisting treatment is conducted successively after the heat treatment and cooling as in the present invention, there may preferably be adopted a manner wherein twists given by the false twisting are extended to the heat treatment zone.
  • Figs. 6 and 7 illustrate embodiments in which the process of the present invention is carried out while twists given at the draw-false twisting step are extended to the heat treatment zone.
  • a travelling yarn 7 unwound from a wound yarn package 5 is passed through a feed roller (R 1 ) 8 and through a heat-treating heater 9 provided with a metal plate while being contacted therewith.
  • a feed roller (R 1 ) 8 When the yarn 7 is passed through the heat-treating heater 9, twists propagated from a false twisting element 14 are given to the yarn 7.
  • the yarn 7 After the yarn 7 is heated in the heat-treating heater 9 in the twisted state, the yarn 7 is cooled by the atmosphere in the room and is guided into a false twisting heater 13 through a twist stop guide 11. If this cooling treatment is not effected and the twist stop guide 10 is not disposed, the drawing tension is extended into the heat-treating heater 9.
  • the yarn is heated to a temperature higher than the glass transition point to initiate drawing. The point at which drawing is initiated is the drawing point 12.
  • the yarn is cooled again by the atmosphere in the room, and just after passage through the false twisting element 14, the yarn is untwisted and is then wound through a delivery roller 15 to'form a package 17 of the drawn and false-twisted yarn.
  • reference numeral 16 represents a winding friction roller (R 3 ).
  • Fig. 7 is a diagram illustrating another embodiment of the process of the present invention.
  • the apparatus shown in Fig. 7 is the same as the apparatus shown in Fig. 6 except that the heat-treating heater 9 is of the non-contact heating type.
  • the heat treatment temperature and drawing ratio are the same as those adopted in the heat treatment conducted in heated air. If the yarn is contacted with the heater surface, the heat treatment time may be shortened by about 0.2 second as compared with the heat--treatment time required when the fiber is not contacted with the heater surface.
  • the An value of the polyester fiber exceeds 150 x 10 -3 , and any as-spun polyester yarn cannot have a ⁇ n value exceeding 150 x 10 -3 . More specifically, as shown in Fig. 3, in case of the as-spun yarn, the An value is at a peak when the spinning speed is about 7,000 m/min and the peak An value is about 120 x 10 -3 . In the case where the filament denier is less than 1 denier, since the draft ratio is increased at the spinning step, even an as-spun yarn has a ⁇ n value larger than that shown in Fig. 3 but the largest value is less than 150 x 10 -3 .
  • an easily-dyeable false-twisted polyester yarn from a polyester fiber having a An value of at least 150 x 10 3 , that is, a polyester fiber which has been drawn after the spinning step, according to a process similar to that of the present invention.
  • the fine structure thereof especially the structure of the amorphous region, is very dense and compact, and ordinarily, as shown in Fig. 13, the (tan 6) max value is about 0.1 and the T max value is at least 130°C.
  • the heat-treated polyester yarn be cooled continuously after the heat treatment.
  • continuous used in the present invention, it is meant that after one step has been completed, a yarn is continuously transferred to the subsequent step without winding of the yarn, i.e., without interruption of the yarn travelling. Namely, the yarn which has been heat-treated in the above-mentioned manner is transferred to the cooling step without winding of the yarn.
  • Either natural cooling or forced cooling may be adopted for cooling the heat-treated yarn.
  • the yarn 7 travels in the room temperature atmosphere during the passage of from the slit heater 11 to the false twisting heater 11.
  • natural cooling it is meant that the yarn 7 is cooled in the room temperature atmosphere while it travels from the outlet of the slit heater 9 to the inlet of the false twisting heater 13.
  • the yarn 7 travels in the room temperature atmosphere during the passage of from the heater 9 to the false twisting heater 13.
  • natural cooling it meant that the yarn 7 is cooled while it travels from the outlet of the slit heater 9 to the inlet of the false twisting heater 13.
  • Adoption of natural cooling is advantageous in that a cooling device need not be disposed and the deviation of the quality among lots can be reduced.
  • the cooling time (A) is important, and a good dyeability can always be attained if natural cooling is carried out so that the cooling time (A) satisfies the following requirement: wherein V stands for the spinning speed (km/min) for the polyester yarn.
  • cooling time (A) used herein is meant a time required for the yarn to travel from the outlet of the heat-treating heater to the inlet of the false twisting heater.
  • the cooling time (A) should satisfy the above requirement is as follows.
  • an as-spun polyester yarn having a An value of at least 15 x 10 but less than 50 x 10 -3 that is, a polyester yarn spun at a spinning speed of at least about 2,500 m/min but less than about 4,000 m/min
  • the X c value is small and the structure of the fiber is incomplete, and the yarn should be drawn in the heat treatment step.
  • the yarn is drawn in the heat treatment step, if the yarn is subjected to the false twisting treatment or draw-false twisting treatment after the heat treatment without performing cooling, especially in case of a small elongation ratio, the molecule chain of the fiber which has been drawn and oriented in the heat treatment step is relaxed and the mechanical properties are often reduced. Accordingly, in the case where the heat treatment is carried out under elongation, that is, in case of a yarn spun at a spinning speed of at least abut 2,500 m/min but less than about 4,000 m/min, cooling is especially preferred, and a relatively long cooling time is preferred.
  • Drawing is not particularly necessary in case of a polyester yarn having a An value of at least 50 x 10- 3 , that is, a polyester yarn spun at a spinning speed of at least about 4,000 m/min.
  • the lower the spinning speed the less the relaxation of the amorphous region caused by the heat treatment, and the higher the spinning speed, the larger the relaxation of the amorphous region caused by the heat treatment. Accordingly, when the spinning speed is higher, the improvement of the dyeability by the heat treatment is increased.
  • the as-spun polyester yarn spun at a spinning speed of at least about 4,000 m/min the higher the spinning speed, the more relaxed the amorphous region, and the dyeability is accordingly improved. Even this as-spun yarn, however, cannot be dyed under normal pressure before the heat treatment of the present invention.
  • the structure is changed and the easily-dyeable structure of the amorphous region is completely formed. If cooling is not sufficient, the easily-dyeability structure is not completed, and if the yarn is subsequently guided to the false twisting or draw-false twisting step in the state where the easily dyeable structure is still incomplete, the easily dyeable structure being set is destroyed at the false twisting step or draw-false twisting step. In case of a fiber where the easily dyeable structure is completed by cooling after the heat treatment, even if the yarn is successively guided to the false twisting or draw-false twisting step, the good dyeability of the false-twisted yarn is maintained at a high level.
  • the cooling time is shorter than in natural cooling, and forced cooling is advantageous in that the speed of the false-twisted yarn can be increased and the structure of the entire apparatus of the present invention can be made compact.
  • forced cooling is meant cooling to be conducted by using any apparatus or device for increasing the cooling effect and shortening the cooling time. From the viewpoint of the cooling effect, a lower cooling temperature is preferred, and ordinarily, it is preferred that forced cooling be carried out at a temperature lower than the level causing dewing resulting in yarn unevenness, for example, at a temperature lower by 5 to 10°C than room temperature.
  • the forced cooling method there can be mentioned a method in which a cold plate maintained at a temperature lower by 5 to 10°C than room temperature is inserted, for example, between the slit heater 9 and first feed roller (R 1 ) 10 shown in Fig.
  • polyester yarn which has thus been heat-treated and subsequently cooled is continuously subjected to the false twisting treatment or draw-false twisting treatment.
  • draw-false twisting treatment used in the present invention is meant a so-called in-draw-false twisting treatment where false twisting is carried out while simultaneously effecting drawing (that is, false twisting carried out at a draw ratio higher than 1.0).
  • false twisting treatment is meant a false twisting treatment which is carried out at a draw ratio of up to 1.0.
  • the false twisting system employed may be any of the conventional pin type, friction type and apron nip type false twisting systems. It is preferred that the twist number be about 80 to about 120% of in which d stands for the calculated denier of the yarn after the false twisting treatment, and that the temperature of the false twisting heater be 180 to 240°C.
  • the heater temperature at the false twisting treatment or draw-false twisting treatment be lower than the heat treatment temperature. If the heater temperature at the false twisting or draw-false twisting treatment is higher than the temperature of the preceding heat treatment, it happens that the easily-dyeable structure of the fiber formed at the heat treatment and set at the cooling treatment is greatly changed to a structure of a poor dyeability. Of course, even if the heater temperature at the false twisting treatment or draw-false twisting treatment is lower than the heat treatment temperature, the structure of the fiber is changed more or less, but the good dyeability is not degraded at all.
  • Whether or not the polyester yarn heat-treated and subsequently cooled is drawn at the false twisting step in the present invention is determined according to the elongation at break of the fiber after cooling. If the elongation at break of the fiber after cooling exceeds 30%, drawing is effected at the false twisting treatment. In contrast, if the elongation at break of the fiber is not more than 30%, the yarn is ordinarily overfed. As the elongation is high, the draw ratio is increased. The elongation at break of the fiber after cooling is changed according to the spinning speed and the heat treatment conditions, and ordinarily, a higher spinning speed, a higher heat treatment temperature and a higher drawing ratio at the heat treatment result in a lower elongation at break.
  • the fine structure of the false-twisted yarn obtained according to the above-mentioned process of the present invention is characterized in that the amorphous region is relaxed. Namely, it now has been found that the (tan ⁇ ) max value determined from the tan 6-temperature curve is at least 0.08 and the relationship of (tan ⁇ ) max > 1 x 10 -2 ( T max - 105) is established.
  • the false-twisted polyester yarn having the above-mentioned structure for the amorphous region is rendered easily dyeable and capable of being dyed under normal pressure with a disperse dye.
  • the amount of the dye adsorbed when the false-twisted yarn obtained according to the process of the present invention is dyed at 100°C for 60 minutes is equal to or larger than the amount of the dye adsorbed when a yarn obtained by subjecting a conventional drawn yarn of a polyethylene terephthalate homopolymer to a customary false twisting treatment is dyed at 130°C for 60 minutes. This property is evaluated according to a method described below.
  • a false-twisted yarn of polyethylene terephthalate copolymerized with a metal sulfonate-containing compound, such as sodium sulfonated isophthalic acid, prepared according to the present invention can be dyed with a cationic or basic dye under normal pressure.
  • the (tan6 ) max value is about 0.10 and T max value is 130 to 140°C, and this false-twisted yarn cannot be dyed under normal pressure.
  • the above--mentioned as-spun polyester yarn is continuously subjected to heat treatment, cooling and false twisting or draw-false twisting.
  • This process in which these three steps are continuously conducted is economically advantageous over the process in which these steps are conducted in a discontinuous manner, because the labor cost and energy cost can be reduced and the area occupied by the apparatus as a whole can be decreased. Moreover, handling of the yarn is facilitated and the frequency for a worker to touch the yarn is reduced, resulting in decrease of yarn defects.
  • the threading property required for carrying out these three steps in a continuous manner is approximately similar to the threading property required for ordinary false twisting or draw-false twisting, and the collecting property of the yarn is rather increased by the heat treatment. Therefore, occurrence of yarn breakage or formation of fluffs is reduced and the operation adaptability is improved.
  • a pre-heating heater or heating roller is disposed upstream of a false twisting heater to pre-heat a yarn prior to the false twisting heater.
  • the pre-heating treatment is carried out so as to increase the false twisting speed, and the pre-heating temperature is lower than the temperature of the false twisting heater and the pre-heating time is very short.
  • the distance between the pre-heating heater and the false twisting heater is short. The process of the present invention cannot be performed in this conventional apparatus.
  • a slit heater 9 disposed between second feed rollers (R O ) 8 and first feed rollers (R l ) 10 without being contacted with the heater 9.
  • the yarn is sufficiently cooled in a room temperature atmosphere while it travels from the slit heater 9 to the false twisting heater 11, and the easily dyeable structure by the heat treatment is set and completed.
  • the yarn is then introduced into the false twisting or draw-false twisting zone comprising the first feed rollers (R l ) 10, a false twisting heater 11, a false twisting element 12 and first delivery rollers (R 2 ) 13.
  • the yarn just coming from the first delivery rollers (R 2 ) 13 has a very high stretchability but since the residual torque in the yarn is very large, the knitting property of the yarn is sometimes very poor. Accordingly, in order to remove the residual torque, the yarn may be passed through a stabilizing heater 14 in the non-contact state between the first delivery rollers (R 2 ) 13 and second delivery rollers (R 3 ) 15. After the torque has thus been reduced, the yarn is brought into contact with a winding friction roll (R 4 ) 16, whereby the false-twisted yarn or the drawn and false-twisted yarn is wound at a certain winding rate to form a package 17.
  • a false twisting apparatus which comprises a feed yarn creel, a false twisting heater or a false twisting heater plus a stabilizing heater and a winder, wherein a heat-treating heater of the non-contact type is arranged upstream of the false twisting heater between the false twisting heater and the feed yarn creel at a height substantially equal to the height of the feed yarn creel so that the heat-treating heater confronts the false twisting heater.
  • the heat-treating heater be arranged at a height substantially equal to the height of the false twisting heater.
  • a false twisting heater, a false twisting element, an optional stabilizing heater and a winder are arranged in this order along a travel passage for a filament yarn taken out from a package on a feed yarn creel.
  • a yarn to be treated is pre-heated, or in order to obtain a variety of modified false-twisted yarns such as a fused yarn, a fluffy yarn and a distorted yarn, a yarn to be introduced into a false twisting zone is pre-heated by a heat-treating heater such as a hot plate or a hot roller and is then subjected to the false twisting treatment.
  • Fig. 10 is a diagram illustrating one example of a conventional false twisting apparatus provided with a heat--treating heater such as mentioned above.
  • another conventional false twisting apparatus which is the same as that shown in Fig. 10 except that the false twisting apparatus is not provided with a heat-treating heater A, in order to simplify the operation by a worker, a feed yarn creel B, a winder C, a false twisting heater D, a false twisting element E, a heat-setting heater F and feed rollers r 1 through r 4 are arranged on both the sides of an operation passage G.
  • the conventional false twisting apparatus provided with the heat-treating heater A as shown in Fig.
  • the heat-treating heater A is arranged above between the feed yarn creel B and the false twisting zone as shown in Fig. 10 so that the operation can be performed in the same manner as in the above-mentioned false twisting apparatus not provided with the heat-treating heater.
  • the conventional false twisting apparatus provided with the heat--treating heater however, formation of fluffs or yarn breakage is frequently caused and no good adaptability to the false twisting operation can be obtained. Furthermore, a sufficient easy dyeability cannot be obtained, and the obtained false-twisted yarn is insufficient in the tight spot, the level dyeing property and the yiels of dyeing level. These defects are especially prominent when the heat treatment temperature is elevated or the length of the heat-treating heater is increased for enhancing the heat treatment effect.
  • the false twisting apparatus of the present invention has been completed based on these findings, which apparatus comprises a feed yarn creel, a false twisting heater or a false twisting heater plus a stabilizing heater, a false twisting element and a winder, wherein a heat--treating heater of the non-contact type is arranged upstream of the false twisting heater and between the false twisting heater and the feed yarn creel, at a height substantially equal to the height of the feed yarn creel so that the heat-treating heater confronts the false twisting heater, and a yarn cooling zone is formed between the heat-treating heater and the false twisting heater.
  • Fig. 11 is a diagram illustrating one embodiment of the present false twisting apparatus and Fig. 12 is a diagram illustrating another embodiment of the present false twisting apparatus.
  • reference numeral 1 represents a feed yarn creel on which feed yarn packages 2 are mounted. A feed yarn 23 in the form of multifilaments is taken out from the feed yarn package 2.
  • Reference numeral 4 represents a false twisting heater for false-twisting the supplied yarn 3 in the heated state, and ordinarily, a hot plate or hot tube is used as the false twisting heater.
  • a false twisting element 5 is disposed to give false twists to the supplied yarn 3.
  • Reference numeral 6 represents a stabilizing heater for heat-setting the false twist-untwisted state in the supplied yarn 3, and ordinarily, a heater of the non-contact type is used as the stabilizing heater 6.
  • this stabilizing heater 6 may be omitted.
  • Reference numerals 7, 8 and 9 represent an operation passage, a winder and a heat-treating heater, respectively.
  • the heat--treating heater 9 is arranged upstream of the false twisting heater 4 in the running passage of the yarn 3 indicated by arrow X between the false twisting heater 4 and the feed yarn creel 1 at a height substantially equal to the height of the feed yarn creel 1 so that the heat-treating heater 9 confronts the false twisting heater 4. If the heat-treating heater 9 is arranged so that the above-mentioned positional requirements are satisfied, important effects of the present invention are attained as described below.
  • the heat--treating heater 9 is arranged so that it confronts the false twisting heater 4, the operation can be facilitated by the provision of the operation passage 7 arranged below and between the two heaters 4 and 9.
  • the heat--treating heater 9 and the feed yarn creel 1 are located on the same side with respect to the operation passage 7. If the position of the heat-treating heater 9 is thus specified, a yarn cooling zone can be formed between the outlet of the heat-treating heater 9 and the inlet of the false twisting heater 4.
  • a heater of the non-contact type is used as the heat-treating heater 9.
  • the heater of the non-contact type there are preferably used, for example, a groove--shaped heater in which a yarn is passed through a groove of a heater plate without being contacted therewith, a hollow pipe-shaped heater in which a yarn is passed through the hollow portion of the heater with no contact with the heater wall and a box-shaped heater having a relatively large size, through which a plurality of yarns are passed with no contact with the heater wall.
  • a groove--shaped heater in which a yarn is passed through a groove of a heater plate without being contacted therewith
  • a hollow pipe-shaped heater in which a yarn is passed through the hollow portion of the heater with no contact with the heater wall
  • a box-shaped heater having a relatively large size through which a plurality of yarns are passed with no contact with the heater wall.
  • other heaters of the non-contact type may be used. Since the heat-treating heater 9 is of the non-contact type, the heating efficiency of the heat-treating heater 9 is low. Accordingly, it is preferred
  • Feed rollers 10, 11, 12, 13 and 14 are rotated at predetermined peripheral speeds to allow the feed yarn 3 to travel and to give a predetermined drawing or relaxation to the yarn in a preset section.
  • Guide pins 15 are disposed to allow the feed yarn 3 to travel along a predetermined course in co-operation with the feed rollers, while changing the running direction of the yarn 3.
  • the heat--treating heater 9 and false twisting heater 4 are arranged to confront each other, for example, with the operation passage 7 being interposed therebetween, as shown in the drawings. Accordingly, air above the operation passage 7, which is a space interposed between the two heaters 9 and 4, is heated by the heat radiated from both the heaters to form a rising air current in the direction indicated by arrow Y.
  • the mist of the oil evaporated while the feed yarn 3 is passed through one heater does not adhere to the feed yarn 3 which is being passed through the other heater, and the feed yarn 3 stably travels in the state where an appropriate amount of the oil is uniformly applied to the feed yarn 3. Accordingly, a uniform false-twisted yarn free of tight spots, which is excellent in the dyeability, can be obtained according to the preferred embodiment shown in Fig. 12.
  • the feed yarn 3 is sufficiently cooled by natural cooling while it travels from the heat-treating heater 9 to the false twisting heater 4, and there can be obtained a false--twisted yarn having an excellent dyeability.
  • a peak temperature (T max of tan ⁇ and a peak value [ (tan ⁇ ) max ] of tan 6 are obtained from the tan ⁇ --temperature curve.
  • Typical instances of the tang--temperature curve are shown in Fig. 13, in which (A) is a curve of a false-twisted polyester yarn prepared according to the present invention, (B) is a curve of a conventional drawn fiber, (C) is a curve of an undrawn fiber spun at a spinning speed of 1,500 m/min and (D) is a curve of a partially oriented fiber spun at a spinning speed of 3,000 m/min.
  • the X-ray generator is operated at 30 KV and 80 mA.
  • the diffraction intensity is recorded from 7° to 35°of 2 ⁇ at a scanning speed of 1°/min, a chart speed of 10 mm/min, a time constant of 1 second, a divergent slit of 1/2°, a receiving slit of 0.3 mm and a scattering slit of 1/2°.
  • the full scale deflection of the recorder is set so that the entire diffraction curve remains on the scale.
  • a polyethylene terephthalate fiber has three major reflections on the equatorial line in the range of from 17° to 26° of 26 at faces of (100), (010) and (110) .
  • Fig. 15 is an example of the curve of the X-ray diffraction intensity of a polyethylene terephthalate fiber, in which (a) indicates a portion of the X-ray diffraction intensity attributed to the crystalline region and (b) indicates a portion of the X-ray diffraction intensity attributed to the amorphous region.
  • a base line is established by drawing a straight line between 7° and 35° of 2 on the diffraction intensity curve.
  • the crystalline portion (a) and the amorphous portion (b) are separated by drawing a straight line along the tail of the lower angle and the tail of the higher angle from the peak point positioned near the angle of 20° of 2 ⁇ .
  • the Xc value is represented by an area analysis method according to the following equation:
  • the refractive index of fibers is characterized by a refractive index to polarized light having an electric field vector in the direction parallel to the fiber axis and a reflactive index n L to polarized light having an electric field vector in the direction perpendicular to the fiber axis.
  • the fiber to be tested is immersed in a sealing medium being inert to fibers and having a refractive index (N) giving a deviation of the interference fringe in the range of 0.2 to 2.0 times the wavelength by using optically flat slide glass and cover glass.
  • the fiber should be disposed so that the fiber axis is perpendicular to the optical axis of the interference microscope and the interference fringe.
  • the pattern of the interference fringe is photographed and enlarged at about 1,500 magnifications for analysis.
  • the optical pass difference R is represented by the following formula: wherein N is the refractive index of the sealing medium, n or (n ⁇ ) is the refractive index between the points S' and S" on the periphery of the fiber, t is the thickness between the points S' and S", X is the wavelength of the radiation used, D is the distance (corresponding to 1 ⁇ ) between parallel interference fringes of the background and d is the deviation of the interference fringe by the fiber.
  • the distribution of the refractive index or n ⁇ of the fiber at each portion can be determined.
  • X is 1 at the position on the periphery of the fiber but X is a value of 0 to 1 at the other position of the fiber.
  • the mean birefringence index (An) is represented as
  • reference numerals 31, 32 and 33 represent the fiber, the interference fringe by the sealing medium and the interference fringe by the fiber, respectively.
  • the dye up-take ratio is 83%. If the dye up-take ratio of the sample is higher than 83%, it is judged that the dyeability of the fiber is good and the fiber can be dyed under normal pressure.
  • the CD 5 . 0 value of a textured yarn from the false twisting step or draw-false twisting step is measured, and this value is designated as a.
  • the textured yarn is immersed in boiling water at 100°C under a load of 0.01 g/d for 1 minute. Then, the yarn is naturally dried at a temperature of 20°C and a relative humidity of 60% in the free state without the load, and the CD 5 . 0 value is measured again. This value is designated as ⁇ .
  • the crimp retention of the textured yarn is expressed by the following formula: Ordinarily, if the crimp retention is at least 65%, it is judged that the crimp retaining property is good.
  • the dyed fabrics are dried and then the colour differences (tolerance indexes) between the standard fabric and the respective samples fabrics are measured.
  • the yield (Y) of acceptable dyeing level is calculated by the following equation.
  • Polyethylene terephthalate having an intrinsic viscosity [ ⁇ ] of 0.68 dl/g as measured at 35°C in a 2/1 mixed solvent of phenol/tetrachloroethane was spun under conditions shown in Table 1 by using the spinning and winding apparatus shown in Fig. 1 to obtain a polyester filament yarn shown in Table 1.
  • the yarns A, B and C shown in Table 1 were treated by using the apparatus shown in Fig. 9 and Table 2 under conditions shown in Table 3.
  • the treating temperature was room temperature, 20°C.
  • Example 2 the yarn B of Example 1 was treated under conditions shown in Tables 2 and 3 by using the apparatus shown in Fig. 9.
  • the cooling length L was 1.6 m
  • the cooling time A was 0.64 second
  • the cooling conditions were as shown in Table 5.
  • Example 7 the yarn B of Example 1 was treated under conditions shown in Tables 2 and 3 by using the apparatus shown in Fig. 9.
  • the cooling conditions adopted were as shown in Table 7.
  • Copolymerization was carried out by substituting a part of terephthalic acid of ethylene terephthalate by isophthalic acid to obtain four kinds of polymers having isophthalic acid contents of 3, 6, 12 and 18% by weight, respectively. These polymers were independently melt-spun at a spinning speed of 5,000 m/min by using the spinning apparatus shown in Fig. 1 to obtain 4 kinds of 75 d/36 f as-spun yarns. The An values of the respective yarns are shown in Table 9.
  • Polyethylene terephthalate having an intrinsic viscosity [n ] of 0.64 dl/g was melt-extruded from a spinneret having 32 holes 0.35 mm in diameter at a spinning temperature of 298°C, and the spun yarn was cooled to be solidified by an air current maintained at 25°C and supplied in the direction parallel to the running direction of the yarn. Then, an oiling agent was applied to the yarn and the yarn was wound at a speed of 3,000 to 6,000 m/min.
  • the obtained polyester multifilament yarn composed of 32 filaments having properties shown in Table 10 was treated by using an apparatus shown in Fig. 7 and Table 11 under conditions shown in Table 12. The obtained results are shown in Table 13. During the false twisting treatment, twists given to the yarn were propagated upstream to the heat-treating heater, and the twists shown in Table 12 were given to the yarn at the heat treatment.
  • Polyethylene terephthalate having an intrinsic viscosity [n] of 0.65 dl/g was extruded at a spinning temperature of 300°C from a spinneret having 36 Y-shaped orifices, and the spun yarn was cooled and solidifed by cold air maintained at 18°C and supplied in the direction parallel to the running direction of the yarn.
  • An oiling agent was applied to the yarn, and the yarn was wound at a speed of 5,500 m/min to obtain a yarn comprising single filaments having a triangular section and having a total denier of 50 deniers.
  • the yarn was subjected to heat treatment, cooling and false twisting in the apparatus shown in Fig. 9.
  • the heat treatment temperature was 248°C
  • the heat treatment time was 0.84 second
  • cooling was carried out for 0.9 second in an atmosphere maintained at 23°C.
  • the false twisting heater temperature was 210°C
  • the twist number was 3,800 t/m
  • the draw ratio at the false twisting treatment was 0%.
  • the tenacity of the obtained false-twisted yarn was 3.7 g/d and the dye up-take ratio was 87%. Thus, it was found that the false-twisted yarn had a practically sufficient tenacity and could be dyed under normal pressure.
  • Polyethylene terephthalate having an intrinsic viscosity [n] of 0.67 dl/g was extruded at a spinning temperature of 302°C through a spinneret having 36 orifices 0.35 mm in inner diameter, and the spun yarn was cooled and solidifed by cold air maintained at 20°C and supplied in the direction parallel to the running direction of the yarn.
  • Five kinds of 75 d/36 f multifilament yarns were prepared by adopting spinning speeds of 2,000, 3,000, 4,000, 5,000 and 6,000 m/min.
  • the An values of the respective yarns are shown in Table 14. These yarns were subjected to heat treatment, cooling and false twisting or draw-false twisting under conditions shown in Table 14 by using the apparatus shown in Fig. 9.
  • the tenacities and dye up-take ratios of the obtained false--twisted yarns are shown in Table 14.
  • the tenacity was higher than 3 g/d if the elongation rate at the heat treatment was 35%, but if the elongation rate at the heat treatment was 0%, the tenacity was less than 3 g/d.
  • the tenacities and dye up-take ratios of the obtained false--twisted yarns are shown in Table 15.
  • the tenacity and dye up-take ratio of the obtained false-twisted yarn are shown in Table 16.
  • Polyethylene terephthalate having an intrinsic viscosity of 0.635 dl/g as measured at 35°C in a 2/1 mixed solvent of phenol/tetrachloroethane was melt-extruded from a spinneret having 36 holes 0.35 mm in diameter at a spinning temperature of 303°C, and the spun yarn was cooled to be solidified by an air current maintained at 20°C and fed in the direction parallel to the running direction of the yarn. An oiling agent was applied to the yarn and the yarn was wound. Three sets of the extrusion rate and winding speed shown in Table 17 were adopted, and three kinds of 75 d/36 f as-spun yarns X, Y and Z were obtained.
  • the as-spun yarn Y of Example 10 was subjected to the partially molten-false twisting by using the apparatus No. 1 or No. 2 used in Example 10 to obtain a linen-like partially molten-false-twisted yarn. Treating conditions were as follows.
  • Polyethylene terephthalate having an intrinsic viscosity of 0.65 dl/g was melt-extruded from a spinneret having 24 olifices, each 0.23 mm in diameter at a spinning temperature of 300°C.
  • the yarn extruded was cooled and solidified with a stream of air at 20°C supplied in parallel to the direction of the running yarn, and then the yarn was wound at a winding speed of 4,500 m/min. to give multifilaments of 50d/24f by using the spinning apparatus shown in Fig. 1.
  • a mean birefringence index An of the yarn was 71 x 10 -3 .
  • the wound yarn was subjected to heat treatment for 0.8 second at an elongation ratio of 0% by passing through a heat treating heater 9 as shown in Fig. 9, which was placed in an atmosphere of mixed gas containing 80 mol% of super heated steam and 20 mol% of air heated at 235°C. Subsequently the yarn was naturally cooled for 1.2 second in an atmosphere maintained at 25°C, and then the yarn was false-twisted at a fales twisting temperature of 212°C at a draw ratio of 7% and a twisting number of 3,900 t/m. The tenacity and dye up-take ratio of the fales-twisted yarn are 3.3 g/d and 87%, respectively.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
EP19830101510 1982-02-19 1983-02-17 Verfahren und Vorrichtung zur Herstellung von falschdralltexturierten, leicht färbbaren Polyestergarnen Expired EP0087124B1 (de)

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Application Number Priority Date Filing Date Title
AT83101510T ATE47163T1 (de) 1982-02-19 1983-02-17 Verfahren und vorrichtung zur herstellung von falschdralltexturierten, leicht faerbbaren polyestergarnen.

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP24561/82 1982-02-19
JP2456182A JPS58144138A (ja) 1982-02-19 1982-02-19 仮撚加工機
JP9851082A JPS58220829A (ja) 1982-06-10 1982-06-10 染色性の改良されたポリエステル仮撚加工糸の製造法
JP98510/82 1982-06-10
JP13761182A JPS5930924A (ja) 1982-08-07 1982-08-07 染色性の改良されたポリエステル加工糸の製造法
JP137611/82 1982-08-07
JP17251882A JPS5966529A (ja) 1982-10-02 1982-10-02 ポリエステル仮撚糸の製法
JP172518/82 1982-10-02

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EP0087124A3 EP0087124A3 (en) 1986-03-19
EP0087124B1 EP0087124B1 (de) 1989-10-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1727538B (zh) * 2000-02-16 2011-02-09 日本Tmt机械株式会社 拉伸和假捻机
CN116427074A (zh) * 2023-04-24 2023-07-14 吴江广宇纺织有限公司 一种加弹机及控制系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2129710A5 (en) * 1971-03-16 1972-10-27 Nazionale Cogne Spa Yarn treatment - by combination of rollers heating tunnels and a twisting spindle
CH530487A (de) * 1971-09-08 1972-11-15 Bayer Ag Verfahren und Vorrichtung zur Herstellung von texturierten Polyesterfäden
FR2193893A1 (de) * 1972-07-25 1974-02-22 Scragg & Sons
FR2208999A1 (de) * 1972-12-05 1974-06-28 Bayer Ag
FR2254662A1 (de) * 1973-12-13 1975-07-11 Teijin Ltd
US3956878A (en) * 1974-09-10 1976-05-18 Fiber Industries, Inc. High speed texturing
EP0061770A1 (de) * 1981-03-31 1982-10-06 Asahi Kasei Kogyo Kabushiki Kaisha Unter normalem Druck färbbare Polyesterfaser und Verfahren zur Herstellung derselben

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2129710A5 (en) * 1971-03-16 1972-10-27 Nazionale Cogne Spa Yarn treatment - by combination of rollers heating tunnels and a twisting spindle
CH530487A (de) * 1971-09-08 1972-11-15 Bayer Ag Verfahren und Vorrichtung zur Herstellung von texturierten Polyesterfäden
FR2193893A1 (de) * 1972-07-25 1974-02-22 Scragg & Sons
FR2208999A1 (de) * 1972-12-05 1974-06-28 Bayer Ag
FR2254662A1 (de) * 1973-12-13 1975-07-11 Teijin Ltd
US3956878A (en) * 1974-09-10 1976-05-18 Fiber Industries, Inc. High speed texturing
EP0061770A1 (de) * 1981-03-31 1982-10-06 Asahi Kasei Kogyo Kabushiki Kaisha Unter normalem Druck färbbare Polyesterfaser und Verfahren zur Herstellung derselben

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1727538B (zh) * 2000-02-16 2011-02-09 日本Tmt机械株式会社 拉伸和假捻机
CN116427074A (zh) * 2023-04-24 2023-07-14 吴江广宇纺织有限公司 一种加弹机及控制系统
CN116427074B (zh) * 2023-04-24 2023-12-15 吴江广宇纺织有限公司 一种加弹机及控制系统

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EP0087124A3 (en) 1986-03-19
EP0087124B1 (de) 1989-10-11

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