US3434277A - Process for producing crimped yarns - Google Patents

Process for producing crimped yarns Download PDF

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Publication number
US3434277A
US3434277A US463269A US3434277DA US3434277A US 3434277 A US3434277 A US 3434277A US 463269 A US463269 A US 463269A US 3434277D A US3434277D A US 3434277DA US 3434277 A US3434277 A US 3434277A
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United States
Prior art keywords
yarn
water
time
cooling
crimped
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US463269A
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English (en)
Inventor
Yutaka Maeda
Kaoru Maeda
Tetsuya Yamamoto
Tetsuo Kashiwagi
Yukihiro Hada
Tokue Kato
Nagao Gomi
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Fuji Keiki KK
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Fuji Keiki KK
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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
    • 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
    • D02G1/0206—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 by false-twisting
    • D02G1/026—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 by false-twisting in the presence of a crimp finish

Definitions

  • the first object of the present invention is to increase the cooling eifect without increasing the length of the cooling section.
  • the second object of the present invention is to carry out steam-setting.
  • the third object of the present invention is to increase the coeificient of friction of a thermoplastic yarn being twisted by washing off any oil agent by adding 3,434,277 Patented Mar. 25, 1969 a small amount of water or a liquid composed mostly of water to the yarn.
  • The-present invention is a process for producing false twisted crimped yarns of a high quality by heating a thermoplastic synthetic fiber yarn Well with a heatsetting heater in a false twisting device, bringing the heated yarn into contact with water or a liquid.
  • a heatsetting heater in a false twisting device
  • water or a liquid composed mostly of Water between the heat-setting heater and a twisting head, removing excess water by such separating method as by the centrifugal force of the rotating yarn and allowing time to evaporate deposited water with the heat kept by the yarn so that the above mentioned objects may be attained within a short time.
  • the yarn having passed through the heat setting heater will have been heated to such high temperature as about C. in the case of a polycapramide yarn. Therefore, as soon as the liquid is deposited on the yarn, it will be highly heated and vaporized to diffuse and will uniformly penetrate into the filament bundles of the yarn and the yarn will be uniformly steam-set.
  • the temperature of the surface of the yarn on which a very small amount of the liquid is deposited will be reduced but the liquid will be highly heated and vaporized and will penetrate into the filament bundles to lightly steam-set them. Therefore, a higher setting eifect than in the case of the conventional dry heatsetting will be obtained.
  • the present invention is to also provide a process of elevating the coeflicient of friction of a yarn in the twisting head by washing off any oil agent by bringing the yarn into contact with water or a liquid composed mostly of water between the heat-setting heater and the twisting head.
  • FIGURES 1, 2 and 3 are explanatory views of false twisting devices embodying the present invention.
  • FIGURE 4 is a graph showing the results of experiments.
  • 1 is a material yarn bobbin on which a thermoplastic yarn is wound
  • 2 is a feed roller and 3 is a heater
  • 4 is a frictional type false twisting device.
  • 5 is a take-up roller (delivery roller).
  • 6 is a traverse drum for winding traverses.
  • 7 is a bobbin on which a crimped yarn is wound.
  • 8 is a tank containing water or a liquid composed mostly of water.
  • 9 is a cock for adjusting the amount of water.
  • 10 is a jetting port.
  • 11 is a suction port for the liquid and air.
  • 12 is a suction pump.
  • 13 is a drain pipe.
  • Y is a yarn.
  • the yarn Y coming out of the yarn bobbin 1 will be fed in with the feed roller 2 and will be twisted with the twisting head 4 while being heated with the heater 3. At the same time, the yarn Y will be cooled by water coming out through the jetting port 10. However, the time of contact with water is so short that the yarn Y will be cooled on the surface but will not be completely cooled in the core.
  • the water remaining in the yarn Y will be also vaporized by the heat kept by the yarn, will elevate the cooling effect and will lightly steam-set the yarn.
  • the excess water coming out through the jetting port 10 the water separated by the centrifugal force of the yarn and the vapor evaporated by the heat of the yarn will be sucked together with the surrounding air by the pump 12 through the suction port 11 and will be drained out through the drain pipe 13.
  • the crimped yarn which has been twisted, heat-set and untwisted will be wound up on the winding bobbin 7 through the take-up roller and traverse drum 6.
  • FIGURE 2 shows an improvement of the apparatus shown in FIGURE 1 wherein, in the case of crimping a thick yarn, the excess water deposited on the yarn will be prevented from spreading as splashes and wetting the surroundings.
  • 1 is yarn bobbin
  • 2 is a feed roller
  • 3 is a heater
  • 4 is a twisting head
  • 5 is a take-up roller
  • 6 is a traverse drum
  • 7 is a winding bobbin.
  • 3' is a preheater.
  • 14 is a feed water roll.
  • 15 is a tank containing water or a liquid composed mostly of water.
  • the yarn Y coming out of the yarn bobbin 1 will be fed in by the feed roller 2 and will be twisted by the twisting head 4 while being heated by the preheater 3 and heater 3. At the same time, the yarn will come into contact with the liquid deposited on the roll 14 and will be cooled and lightly steamed. In order that it may be easy for the yarn to come into contact with the liquid in such case, it is preferable to make a shallow groove on the surface of the roll to be in contact with the yarn.
  • FIGURE 3 shows a part of the false twisting device of the present invention wherein the yarn feeder and take-up device are the same as in FIGURES 1 and 2 and are therefore omitted in the drawing.
  • the yarn Y heated through the heater 3 will come into contact with the roll 14 while being twisted by the twisting head 4, will have water or a liquid composed mostly of water deposited on it, will be cooled and lightly steam-set and will be wound up through the take-up roller 5.
  • the lower part of the roll 14 is dipped in the water or the liquid composed mostly of water in such semicylindrical tank 15 as is illustrated. Said liquid will be fed from a tank 17 through a pipe by having the amount adjusted with a cock 18.
  • thermoplastic synthetic yarn As a thermoplastic synthetic yarn is crimped as described above, there can be obtained various effects that the distance between the heater and twisting head can be made shorter than in the case of only air-cooling the yarn and that the yarn can be steam-set.
  • Example 1 An example wherein a polycapramide fiber yarn (which shall be known as a nylon yarn hereinafter) of 30 d./ 10 fil. was crimped with the false twisting device in FIG- URE 1 shall be explained.
  • a polycapramide fiber yarn which shall be known as a nylon yarn hereinafter
  • the yarn contact length of the setting part of the heat-setting heater 3 was made 420 mm.
  • the temperature of its central part was made C.
  • the distance from the end of the setting part to the first yarn contact point of the twisting part was made 295 mm.
  • the distance (which shall be known as an air-cooling section hereinafter) from the end of the setting part to the point of contact of the nylon yarn with water (which point shall be known as a water contact point hereinafter) was made 50 mm.
  • the yarn speed ratio (which is known also as a specific sliding and is the yarn speed/surface speed of the frictional type false twisting head) was made 0.22.
  • the amount of water was made 1.2 liters per minute.
  • the crimping speed of the yarn was varied.
  • the relation with the quality of the yarn (which may be considered the relation between the heating time with the heat-setting heater and the quality of the yarn as the other conditions were the same) was determined by experiments. As a result, it was found that, in case the heating time was longer than 0.15 to 0.17 second, there was substantially no difference from the quality of a yarn crimped with a spindle type false twisting device.
  • This yarn shall be known as a contrast yarn hereinafter and was crimped at a number of revolutions of the spindle of 9500 rpm, a length of the heater of 420 mm. and a yarn speed of 18.5 m./min.) In such case, when the yarn was not brought into contact with water, its limit was 0.16 to 0.19 second. Therefore, after all, by the increase of the cooling effect and the steam-setting effect, the heat-treating effect improved by about 10%.
  • the heating time was made longer than 0.2 second. While the other conditions were kept constant, the distance (which shall be known as a wet-cooling section hereinafter) from the water contact point to the first yarn contact point of the twisting head was adjusted and the yarn speed was varied to vary the time of the passage of the yarn through the wet-cooling section (which time shall be known as a wet-cooling time hereinafter). Then, in case said time was longer than 0.012 to 0.014 second, the quality of the crimped yarn was not inferior to that of the contrast yarn. When the time was shorter than that, the twisting tended to become unstable presumably because the amount of evaporation of water was so small that the yarn was too wet.
  • the heating time was made longer than 0.2 second
  • the wet-cooling time was made longer than 0.015 second and the other conditions were kept constant but the time of the Passage through the air-cooling section (which time shall be known as an air-cooling time hereinafter) was varied, it was found that the air-cooling time had better be as short as possible and that, in case the air-cooling time was less than 15% of the heating time, the process of the present invention was very effective.
  • the air-cooling time exceeded 30 to 40% of the heating time, the effect was reduced remarkably. Specifically, when it exceeded 50 to 60%, even if the yarn was brought into contact with water, no significant difference was seen.
  • Example 2 In case a nylon yarn of 50 d./ 17 fil. was crimped by substantially the same process as in Example 1, it was found that the heating time must be longer than 0.2 to 0.24 second and that the wet-cooling time must not be shorter than 0.015 to 0.017 second. Further, there was obtained a result that the relation between the air-cooling time and heating time was not so different from that in Example 1.
  • Example 3 An example wherein a nylon yarn of 70 d./34 fil. was crimped with the same false twisting device as in Example 1 shall be explained.
  • the yarn contact length of the setting part was made 620 mm.
  • the temperature of the central part of the set part was made 180 C.
  • the temperature distribution in the direction of the length was made +1 C. to 4 C. in the setting part except 100 mm. from each end
  • the yarn speed ratio was made 0.23 and the amount of water was made 1.2 liters/ min. in carrying out the experiment.
  • the contrast yarn was crimped at a yarn speed of 28 m./min. in a spindle type false twisting device in which the heater length was 420 mm. and the number of revolutions of the spindle was 95,000 r.p.m.
  • the heating time was made longer than 0.3 second and the minimum value of the wet-cooling time was determined, it was concluded that the wet-cooling time must be longer than 0.018 to 0.02 second.
  • the heating time was made longer than 0.3 second
  • the wet-cooling time was made longer than 0.02 second and the relation between the heating time and air-cooling time was investigated, the result was substantially the same as in each of the preceding examples.
  • Example 4 An example wherein a nylon yarn of 110 d./ 24 fil. was crimped with a false twisting device of such structure as in FIGURE 2 shall be explained.
  • the length of the setting part of the preheater 3 was made 250 mm. (as the yarn was turned and was again brought into contact, the yarn contact length was 500 mm), the temperature of the central part of the preheater was made 170 C., the temperature distribution in the direction of the length was made C. to 5 C. (except 40 mm. from each end), the yarn contact length of the heat-setting heater 3 was made 620 mm. (contact with the entire length of 620 mm. of the setting part), the temperature of the central part of the heater 3 was made 185 C., the temperature distribution in the direction of the length (except 100 mm, from each end) was made +1 C.
  • the distance between the ending end of the preheater 3' and the beginning end of the heat-setting heater 3 was made 35 mm.
  • the material of the feed water roll 14 was made a phenol resin
  • the diameter of the roll was made 45 mm.
  • the number of revolutions of the roll was made 105 rpm.
  • the yarn speed ratio was made 0.21 in carrying out the experiment.
  • the contrast yarn was crimped at a yarn speed of 26 m./min. in a spindle type false twisting device in which the heater length was 420 mm. and the number of revolutions of the spindle was 80,000 rpm.
  • the wet-cooling section was made about 250 mm. long and the minimum value of the heating time was determined, it was found that the value must be 0.4 to 0.45 second.
  • This heating time was substantially the same as in the case that the yarn was heated with a continuous heater of a yarn contact length of 1100 mm. and was not brought into contact with water. It was because the temperature of the preheater was somewhat lower and, between the preheater and heat-setting heater, there was a place in which the yarn passed through air though for a short distance. It is considered that, in case such place continues at the same temperature, it will be possible to reduce the heating time to about 0.35 to 0.4 second.
  • the heating time was made longer than 0.5 second and the minimum value of the wet-cooling time was determined, there was obtained a result that it was 0.022 to 0.025 second. Further, when the heating time was made longer than 0.5 second, the wet-cooling time was made longer than 0.03 second and the ratio of the heating time to the air-cooling time was investigated, it was found that, in case the air-cooling time was less than about 10% of the heating time, the process of the present invention was very effective, that, when it exceeded 25 to 35%, the effect reduced very much and that, when it exceeded 40 to 50%, there was no specific elfect as compared with the case of air-cooling only.
  • Example 5 When a nylon yarn of 210 d./34 fil. was crimped in the same manner as in Example 4, there were obtained results that the minimum heating time was 0.6 to 0.7 second, the minimum wet-cooling time was 0.03 to 0.035 second and the ratio of the heating time to the air-cooling time was the same as in Example 4.
  • Example 6 It was so difficult to crimp a yarn of more than 250 deniers with the frictional type false twisting head that the twisting head 4 in FIGURE 2 was replaced with a spindle.
  • the other conditions than in the twisting part were made the same as in Example 4 and a nylon yarn of 420 d./48 fil. was crimped.
  • the minimum heating time was 1.0 to 1.2 seconds
  • the minimum wetcooling time was 0.045 and 0.05 second
  • the ratio of the heating time to the air-cooling time approximated that in Example 4.
  • Example 7 In the case of a nylon yarn of 840 d./ 136 fil., the minimum heating time was 1.7 to 2.0 seconds, the minimum wet-cooling time was 0.06 to 0.07 second and the ratio of the heating time to the air-cooling time was not so different from that in each of the preceding examples.
  • Example 8 When a nylon yarn of about 1500 d./ fil. was made by doubling 7 nylon yarns of 210 d./15 fil. and was crimped, there were obtained results that the minimum heating time was 3.0 to 3.5 seconds, the minimum wetcooling time was 0.09- to 0.1 second and the ratio of the heating time to the air-cooling time was not so different from that in Example 4 but fluctuated considerably.
  • Example 9 An example wherein a nylon yarn of 20 deniers was crimped with the false twisting device in FIGURE 3 shall be explained.
  • the number of twists was 3100 t./m.
  • the number of twists was 3240 t./m. Thus the increase of the number of twists was seen.
  • active agents were added to the solvent, the results were as follows:
  • Anionic active agent 0.1% 3, 250 Softened. Cationic active agent, 0.1% 3,100 Do. Neutral active agent 0.1 3,160 Do. Brilliant blue 6B, 6 3, 650 Not changed. Orange II, 5 3, 360 Do. Colloidal silica, 5% 4,030 Stifiened.
  • a process for producing crimped yarns by crimping thermoplastic synthetic yarns with a false twisting device comprising heating a yarn for more than .0125 D-' second (wherein D is a number of deniers), bringing said yarn into contact with a liquid for a time less than 60% of the heating time without interrupting the twist running so that a proper amount of the liquid may be deposited on the yarn, leaving the yarn for a wet-cooling time of more than .002 D second (wherein D is a number of deniers) and then making the yarn reach a twisting part.
  • thermoplastic synthetic fiber yarns are polycapramide yarns, polyhexamethylene adipamide yarns, polyethylene terephthalate yarns, polypropylene yarns and yarns of their copolymers.
  • twisting head is preferably a frictional type high speed false twisting device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US463269A 1964-06-16 1965-06-11 Process for producing crimped yarns Expired - Lifetime US3434277A (en)

Applications Claiming Priority (3)

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JP3436164 1964-06-16
JP4061564 1964-07-15
JP4273264 1964-07-27

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US463269A Expired - Lifetime US3434277A (en) 1964-06-16 1965-06-11 Process for producing crimped yarns

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US (1) US3434277A (de)
CH (1) CH826565A4 (de)
DE (1) DE1660290A1 (de)
FR (1) FR1479236A (de)
GB (1) GB1081189A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651633A (en) * 1970-10-27 1972-03-28 Fiber Industries Inc Flange false twist textured nylon
US4316358A (en) * 1978-10-05 1982-02-23 Oda Gosen Kogyo Kabushiki Kaisha False-twisting system
US4380144A (en) * 1981-08-03 1983-04-19 Milliken Research Corporation Belt false twisting system
US4380890A (en) * 1981-08-06 1983-04-26 Milliken Research Corporation Belt false twisting apparatus
WO1985001691A1 (en) * 1983-10-21 1985-04-25 P.V. Trim Limited Improvements to heat exchangers
CN107354555A (zh) * 2017-09-06 2017-11-17 浙江凯成纺织机械有限公司 一种变形丝机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473317A (en) * 1968-04-11 1969-10-21 Mitsubishi Rayon Co Method for manufacturing crimped acrylonitrile filament yarn
JPS5214693U (de) * 1975-07-19 1977-02-02
FR2424344A1 (fr) * 1978-04-25 1979-11-23 Asa Sa Procede et dispositif pour le traitement de fils chimiques par fausse torsion

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477909A (en) * 1945-01-29 1949-08-02 Stockly Johann Process and apparatus for producing woollike filaments of cellulose hydrate rayon
US3077724A (en) * 1957-09-09 1963-02-19 Leesona Corp Apparatus for processing yarns
US3237392A (en) * 1963-08-14 1966-03-01 Chavanoz Moulinage Retorderie Process for producing bulked yarn
US3333409A (en) * 1966-07-11 1967-08-01 Chavanoz Moulinage Retorderie Process for producing high bulk stretch yarns

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477909A (en) * 1945-01-29 1949-08-02 Stockly Johann Process and apparatus for producing woollike filaments of cellulose hydrate rayon
US3077724A (en) * 1957-09-09 1963-02-19 Leesona Corp Apparatus for processing yarns
US3237392A (en) * 1963-08-14 1966-03-01 Chavanoz Moulinage Retorderie Process for producing bulked yarn
US3333409A (en) * 1966-07-11 1967-08-01 Chavanoz Moulinage Retorderie Process for producing high bulk stretch yarns

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651633A (en) * 1970-10-27 1972-03-28 Fiber Industries Inc Flange false twist textured nylon
US4316358A (en) * 1978-10-05 1982-02-23 Oda Gosen Kogyo Kabushiki Kaisha False-twisting system
US4380144A (en) * 1981-08-03 1983-04-19 Milliken Research Corporation Belt false twisting system
US4380890A (en) * 1981-08-06 1983-04-26 Milliken Research Corporation Belt false twisting apparatus
WO1985001691A1 (en) * 1983-10-21 1985-04-25 P.V. Trim Limited Improvements to heat exchangers
CN107354555A (zh) * 2017-09-06 2017-11-17 浙江凯成纺织机械有限公司 一种变形丝机

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FR1479236A (fr) 1967-05-05
GB1081189A (en) 1967-08-31
DE1660290A1 (de) 1972-04-06
CH826565A4 (de) 1970-02-13

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