US3807162A - Covered elastic yarn - Google Patents

Covered elastic yarn Download PDF

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Publication number
US3807162A
US3807162A US00143940A US14394071A US3807162A US 3807162 A US3807162 A US 3807162A US 00143940 A US00143940 A US 00143940A US 14394071 A US14394071 A US 14394071A US 3807162 A US3807162 A US 3807162A
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Prior art keywords
yarn
elastic
thread
filament
filaments
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US00143940A
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English (en)
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Y Tsujita
K Yuki
H Asami
T Kimura
S Yamashita
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Toray Industries Inc
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Toray Industries Inc
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Priority to DE2207614A priority Critical patent/DE2207614B2/de
Priority to US405167A priority patent/US3921382A/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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane

Definitions

  • ABSTRACT 57/163 Primary Examiner.lohn Petrakes [57] ABSTRACT
  • the present invention relates to a covered elastic yarn with an elastic thread as a core yarn, and a continuous thermoplastic multifilament thread as a sheath yarn, wherein the respective filaments forming said covered elastic yam are respectively tangled with each other to retain flux form, and at the same time to form the sheath-core system, and said sheath yarn wraps the outer periphery of said core yarn but is reversed irregularly and intermittently in said direction, and said sheath yarn and said core yarn are substantially twistless.
  • This invention relates to a novel elastic yarn and to a method of making this yarn.
  • the yarn according to this invention is a covered yarn wherein a multi-filament, continuous filament thread as a sheath yarn wraps a core yarn in such a manner that said multi-filament thread wraps round said elastic thread, and said core yarn and said sheath yarn are substantially twistless.
  • elastic yarn such as rubber yarn or polyurethane elastic filament yarn is used as the core in the convection of ejected fluid, and other filament yarns are tangled therewith, or elastic yarn and thermoplastic filament yarn are associated, and the associated yarns are crimped in twisting-heat setting-untwisting type method so called ltallian type" (twister) to produce over-untwisting yarn, While, the conventional covered elastic yarns have excellent characteristics, they have the following drawbacks.
  • the covering property is excellent but in view of the ordinary twisting process which is required in this case, the productivity thereof is-not more than that of single covered yarn; at the same time, the number of processes is increased, and the cost of production is high, and therefore over-twisted yarn produced by the Italian type twister is not practical.
  • the present invention has the following structure.
  • This invention relates to a covered elastic yarn comprising an elastic thread as a core yarn and a multifilament continuous filament thread as a sheath yarn, wherein the respective filaments forming said covered elastic yarn are tangled to retain the fluxability and at the same time to form sheath-core stage, and said sheath yarn wraps the outer periphery of said core yarn, and is reversed intermittently and irregularly in said direction, and said sheath yarn and said core yarn are substantially twistless.
  • the yarn of this invention is produced by using elastic thread having remarkably high elongation and recovery, such as rubber yarn or polyurethane filament yarn, as the core yarn.
  • Said core yarn may be a monofilament but it is preferable to use a plural number of associated filaments, i.e., multi-filament; as a matter of course it is most preferable that the number of filaments should be great.
  • a crimped yarn composed of multi-filament yarn composed of thermoplastic filaments can be used as said sheath yarn.
  • Said sheath yarn covers and is twisted around said core yarn, and the core yarn is placed almost in the centre of said covering elastic yarn, and in regard to the direction of twisting of said sheath yarn, said sheath yarn is twisted in such a direction that said sheath yarn is twisted with random interval and intermittently in the lengthwise direction of said covered elastic yarn, and either filaments themselves forming said sheath or the filaments forming said sheath yarn and said core yarn are mutually tangled to retain fluxability.
  • thermoplastic synthetic yarn When thermoplastic synthetic yarn is used as the core yarn, random untwisting or slight crimping can be observed intermittently in the same manner as in the case of said sheath yarn.
  • FIG. 1 (A) is a model schematic view of a length of conventional covered elastic yarn, in its fully, or nearly fully, elongated condition.
  • FIG. I (B) is a model schematic view of a length of the yarn of FIG. 1 (A) contracted further than in FIG. I (A).
  • FIG. 2 (A) is a model schematic view of a length of covered elastic yarn prepared by conventional falsetwisting method, in its fully, or nearly fully elongated condition.
  • FIG. 2 (B) is a model schematic view of a length of the yarn of FIG. 2 (A) contracted further than in FIG. 2 (A).
  • FIG. 2 (C) is a model schematic view of a length of the yarn of FIG. 2 (B) further twisted.
  • FIG. 3 (A) is a model schematic view of a length of the yarn in accordance with this invention, in its fully, or nearly fully elongated condition.
  • FIG. 3 (B) is a model schematic view of a length of the yarn of FIG. 3 (A) contracted further than in FIG. 3 (A).
  • FIG. 4 (A) is an enlarged cross sectional view of the yarn of FIG. 2 (A);
  • FIG. 4 (B) is an enlarged cross sectional view of the yarn of FIG. 2 (B);
  • FIG. 5 (A) is an enlarged cross sectional view of the yarn of FIG. 3 (A);
  • FIG. 5 (B) is an enlarged cross sectional view of the yarn of FIG. 3 (B).
  • FIG. 6 (A) is a schematic view of false-twisting apparatus which, shown partially in cross section, which can be used to make the yarn in accordance with the present invention.
  • FIG. 6 (B) is a vertical sectional view of a guide in the apparatus shown in FIG. 6 (B).
  • FIG. 7 (A) is a schematic view, partially in cross section, of modified false twisting apparatus which can be used to make the yarn in accordance with this invention.
  • FIG. 7 (B) is a vertical sectional view of a star-wheel type pulley usable for FIG. 8 (A).
  • FIG. 1 (A) is a model schematic view of the covered elastic yarn twisting two yarns (2) and (21) on the core yarn (l) by a conventional spinning machine or a conventional twister, in elongated state.
  • FIG. 1- (B) is a model schematic view of the covered elastic yarn of FIG. 1 (A) contracted by 30 percent.
  • the filaments of the sheath yarns (2), (2') of the covered yarn are regularly twisted and therefore the covering property of the covered elastic is remarkably excellent, but since the filaments composing the covered yarns (2), (2') are controlled by twisting, the space occupied by said filaments becomes narrower, and the bulkiness thereofis deteriorated, and this is accounted to be a drawback.
  • FIG. 2 (A) is a model schematic view of a covered yarn under tension prepared by simply associating and conventional false-twisting the core yarn (1) and the covering yarns (2), (2') and FIG. 2 (B) shows a model schematic view of the same yarn shown in FIG.'2- (A) contracted by 30 percent.
  • the core yarn (I) and the covering yarns (2), (2) have no twist at all, and it is very bulky but there is no contact of the filaments composing the core yarn and the covering yarn (See FIG. 4 described below).
  • the covering property is very poor, and the core yarn and the covering yarn can be separated by a slight external effect when the covered yarn passes through a guide or tensioner, and the separated core yarn and the covering yarn are not restored to their original state, and this is accounted to be a serious drawback.
  • FIG. 2 (C) shows the form of the yarn after the above mentioned additional twisting or pre-twisting. Theincrease of the number of processes in making this yarn, and its poor bulkiness are accounted to be drawbacks.
  • FIG. 3 (A) and FIG. 3 (B) show the covered elastic yarns obtained in accordance with the present invention in comparison with the covered elastic yarns obtained in accordance with the prior arts.
  • FIG. 3 (A) shows the covered elastic yarn of the present invention under tension in the same manner as in FIG. 1 (A) and FIG. 2 (A), and FIG. 3 (B) shows said yarn contracted by about 30 percent.
  • FIG. 3 (B) is a model schematic view of the structure which makes use of the merits of the yarns of FIG. 2 (B) and FIG. 1 (B), so as to compensate for the respective drawbacks thereof.
  • the filaments composing the sheath yarn (2), (2) covering the core yarn (l), are reversed in the twisting direction at random intervals.
  • FIG. 3 (A) and FIG. 3 (B) shows the twist reversing point of said filaments.
  • the above described phenomena are demonstrated by all of the filaments forming the sheath yarn, and therefore the covered elastic yarn as a whole has remarkably excellent covering property, and at the same time, the filaments forming thesheath yarn have almost no contact against the core filaments attributable to twisting because the filaments forming the core yarn and sheath yarn are substantially twistle'ss, and therefore excellent bulkiness can be attained.
  • a covered elastic yarn of FIG. 2 (A), (B), produced in accordance with a conventional falsetwisting method is covered with the covering yarn not being closely adhered on the elastic yarn (l) as is apparent from FIG. 4 (A), (B), while in a covered elastic yarn produced in acccordance with the present invention, as is apparent from FIG. 5 (A), (B), the thermoplastic continuous multifilament thread is partially laid in the elastic thread (1) in such a manner that the thermoplastic continuous multifilament thread is inserted into said elastic thread.
  • the yarn of the present invention has remarkably excellent fluxability, and the slipping-off of the core yarn (l) is less against tension and pulling, and the covering property is not at all deteriorated.
  • an elastic thread is released from the package thereof under tension, and a thermoplastic continuous multi-filarnent thread and said elastic thread are associated, and thus associated, the thermoplastic continuous multifilament and the elastic thread are passed through the fluxing guide, and are arranged in such a manner that said elastic thread can become the core and that said multi-filament thread can wrap said elastic thread, and the thus obtained fluxed and associated yarns are then supplied into a false twisting machine, to carry out a twisting, heat setting and untwisting process.
  • the relation of said elastic thread and thermoplastic multi-filament thead is such that the filaments of said thermoplastic multifilament thread are arranged in such a manner that the elastic thread can.
  • the covered elastic yarn thus obtained has elastic thread within the fiber flux of the crimped thermoplastic multi-filaments by means of false twisting, and the elastic thread is covered with the crimped multi-filament, and therefore the two cannot be easily separated.
  • the elastic thread as the core yarn and the filaments forming the sheath yarn are substantially untwisted, and the generation of torque and kink can be hardly observed.
  • temperature should be adjusted to be sufficient to fix the desirable crimping of the thermoplastic multifilament to be used as the sheath thread, but it is necessary that the kind of elastic thread used as the core yarn should be taken into consideration.
  • the temperature at which false twisting is carried out must be adjusted to be low so as not to-damage the elastic thread, or said elastic thread must be protected by the sheath thread, and therefore it is a matter of course that the conditions such as the kind of the sheath thread, temperature and the number of twisting turns should be taken into consideration.
  • thermoplastic elastic thread such as polyurethane fibers
  • the elastic thread is supplied under a high tension or high elongation in a high temperature zone
  • the elongation of the covered elastic yarn product is less; on the contrary, when the elastic thread is supplied under less tension or at low elongation, the elongation of the covered elastic yarn product is larger.
  • polyurethane elastic yarn as the core yarn, is subjected to the false twisting treatment at a temperature in the neighbourhood of the melting point of the core yarn, i.e. if the heat-setting of the false twisting is carried out at a temperature ranging from lC to 200C, or more preferably at C, the polyurethane elastic yarn is softened, and, in addition, the twists attributable to the false twisting is generated on the surface of said polyurethane elastic yarn, and therefore the fibers forming said sheath strand are laid into the concave portions produced by the twisting of said elastic yarn.
  • the covering property of the covered elastic yarn which can be obtained as described above can be further improved, and at the same time the migration of said sheath thread cannot be brought about by the external frictional force.
  • thermoplastic multi-filaments thread as the sheath yarn to the same false twisting machine
  • the filaments forming the thermoplastic multi-filaments should be parallelly arranged in such a manner as to rap the core yarn.
  • the above mentioned arrangement determines the superiority of the covering property of the covered elastic yarn of this invention.
  • said elastic thread in order to place the elastic thread in the center, said elastic thread should be supplied under tension, to prevent the free slipping-off thereof, and furthermore the multi-filament thread should be supplied under low tension to wrap said elastic thread.
  • the fibers which are to become sheath form the outer side, and' the elastic thread which is to become the core thread is placed in the center.
  • a gude for fluxing the thread i.e. a U or V shaped yarn guide or a star-wheel type pulley guide having a U or V shaped concave portion on the periphery thereof to arrange the filaments in the neighbourhood of the twist-starting point, and to prevent, from that point backward the twisting of the fluxed threads which abruptly starts, beyond that point, using a nip roller guide to define that point.
  • the elastic thread and non-elastic thread are directly introduced into a false twisting machine after they have been associated, but it is necessary to keep said elastic thread and non-elastic thread in the associated state for a predetermined time, and said elastic thread is introduced into the center of said non-elastic thread by the above mentioned treatment.
  • said core yarn and said sheath yarn are doubled
  • the doubling state is retained for a predetermined distance, while a tension difference is maintained therebetween in a yarn introducing zone of a false-twisting apparatus, in which the yarn is falsetwisted while the backward travel of twist is controlled, and thereby said core yarn is sufficiently placed into said sheath yarn.
  • FIG. 6 and FIG. 7 are diagrams showing the embodiments of apparatus for carrying out the process and for making the product of the present invention.
  • the thread (8) which is released from package (7) of the thermoplastic multi-filament yarn which becomes the sheath yarn passes through the guide (9), and is supplied to the feed roller (6) of the false-twisting machine, and is associated with the elastic thread (5).
  • the elastic thread (5) supplied by the feed rollers (6), and the continuous multi-filament thread (8) are arranged by the grooved guide (10) having a V shaped groove in the lateral cross section perpendicular to the running direction of said threads (5) and (8) in such a manner that said thread (5) is arranged within the central portion of said continuous multi-filament thread (8).
  • Said elastic thread (5) and continuous multifilament thread (8) are then subjected to false twisting by means of the false twisting spindle (l3), and the twisted portion thereof is thermally set by means of the heater (12), and when said threads have passed through said spindle (13), they are untwisted, and are drawn out by a pair of delivery rollers (14), and said threads pass through the guide (15), and are taken up i into a package (17) by means of a take up device such as drum type winder.
  • the false twisting is perfectly stopped by a nip roller (11), and the two threads keep their associated state between the feed roller (6) and nip roller (11). This prevents twist from travelling backward to grooved guide (10) or said feed rollers (6) so that the state of core-sheath of the two threads is not destroyed thereby.
  • FIG. 6 (B) is a diagram showing the cross sectional form of. grooved guide (10) in the plane perpendicular to the running direction of the threads (5), (8), and
  • said elastic thread (5) is arranged into the central portion of said continuous multi-filament thread (8) in said groove.
  • FIG. 7 is a diagram showing a modified form of the apparatus of FIG. 6 (A), (B).
  • the elastic thread (5) released by the positive feed-roller (4) from the package (3) thereof is elongated by a predetermined degree between said feed roller (4) and delivery roller (14).
  • Said elastic thread (.5) is associated with the thermoplastic multi-filament thread (8) released from the package (7) thereof in an almost tensionless state, and is supplied into the star-wheel type pulley (18).
  • FIG. 7 (B) is a cross sectional view of said star-wheel pulley across the center of said star-wheel type pulley, Said star-wheel type pulley is light and is rotated in the running direction of the threads (5), (8) on shaft (20) by contacting with the threads.
  • the peripheral portion (21) of said pulley (as seen in FIG. 7 (B)) has a shaped groove that helps said two threads take on a sheath-core form without adding high tension to said continuous multi-filament thread which becomes sheath thread by using said pulley and said elastic thread (5) arranged in the central portion of said continuous multi-filament thread (8) therein.
  • a pin nip rollers (11) is provided in order to prevent the travelling of the twist of the false-twisting machine during the false twisting process, but when a pair of the nip rollers (11) is used, there is a fear that the sheath-core arrangement of the threads (5), (8) attained by the groove guide (10), may be upset thereby.
  • the respective threads (5), (8) associated in the sheathcore state are taken up on the package (17) after they are subjected to the process for twising-heatsettinguntwisting.
  • the covered elastic yarn thus obtained is an elastic yarn having remarkably strong covering property, and the covering cannot be destroyed even if it is used over and over again, and partial exposure of the core yarn thereof can be hardly observed, and the cover elastic yarn has a very uniform shape in the lengthwise direction thereof.
  • thermoplastic filaments are slightly melted and adhered by raising the temperature of the heater of the false twisting machine, it is needless to mention here that faster covering can be attained and the covering becomes more compact.
  • the covered elastic yarn of the present invention has almost the same processiability as the ordinary crimped yarns, and it is possible to adjust the crimping degree by adjusting the temperature of the heater of the falsetwisting machine and the stretch power thereof is almost the same as that of the thermally set single covered yarn, or core spun yarn.
  • the covered elastic yarn of the present invention is twistless yarn, snarls and kinks are not easily formed in the yarn of this invention when compared with the conventional single covered yarn to say nothing of the conventional false twisted crimped yarn.
  • the hank reeling property, hank dyeing property, hank winding property, cone-up property, preparing property for weaving, and preparing property for knitting of the covered elastic yarn of the present invention are the same as or more excellent than those of the conventional false twisted crimped yarn or single covered yarns.
  • the woven or knit fabrics obtained from the covered elastic yarn of the present invention can present the soft touch of wooly yarn by crimping process of the thermoplastic filaments and twistless covering process into the elastic filament yarn attained thereby, without being controlled by twist thereof, and has a special appearance as woven or knit goods.
  • the covered elastic yarn of the present invention can be directly used for producing the ordinary knit goods,
  • the covered elastic yarn of the present invention When the covered elastic yarn of the present invention is used for knit goods, there is a remarkable advan tage that the yarn having the same stretch power as that of the conventional thermoplastic yarn can be directly woven from the cheese of the false-twisted yarns since in accordance with the prior art, the covered elastic yarn is used by thermally setting the same in most cases.
  • the processing speed of the covered elastic yarn of the present invention isfrom to 10 times the speed of the conventional yarns, and it is apparent that the present invention can greatly'reduce the cost of production.
  • the method of this invention can be easily worked out directly on the conventional false twisting machine, or by a simple improvement of the conventional devices, and the operation required for working out the method of thisinvention is hardly different from that of the conventional methods.
  • the yarn of the present invention was wound on the periphery of a 50 cm frame for 10 times, and thermal treatment was carried out with 60C hot water for 30 minutes.
  • the length l, of the yarn with the weight hanging down is read.
  • a polyurethane elastic thread 40 denier-I filament used in the following examples and comparative examples is a monofilament in which six polyurethane elastic filaments are coalesced, and a polyurethane elastic thread denier-I filament is a monofilament in which 18 polyurethane elastic filaments are coalesced.
  • Examples l and 2 A polyurethane elastic thread 40 denier-l filament elongated by 3.5 times of the original length thereof and Nylon-6, 70 denier-34 filaments being tensioned by 0.1 g were associated with each other, and thereafter the associated filaments were supplied'into the apparatus embodiment as shown in FIG. 6. (A), (B), and treated under conditions as shown in items EX-l and Ex-2 of Table-1.
  • Polyurethane thread (denier-filament) 40- 1 40-1 40- I Nylon-6 multi filament (denier-filament) 70-34 70-34 70-34 70-34 Conditions of processing:
  • covered elastic yarns of the present invention in the production of which there is a relatively large difference between the tension of the polyurethane elastic thread and that of the Nylon-6 multifilament, and heat-setting of the false-twisting is carried out at a temperature ranging from 180C to.
  • the covered elastic yarn in accordance with Example-3 produced with only slight differential tension between the polyurethane elastic thread and the Nylon-6 multi-filament and with heat-setting of the false-twisting at a temperature lower than 180 "C, i.e., [70C, has poor covering property, because the respective filaments of Nylon-6 are generally not adhered to the outer surface
  • TABLE 2 EX-1 EX-2 EX-3 Number of filaments of Nylon-6z Multi-filament adhered to-polyurethane elastic thread (number/an optional cross section of the covered elastic yarn) 22 16 Multi-filament not adhered to polyurethane elastic thread (number! an optional cross section of the covered elastic yarn) l2 18 34 Covering property (percent):
  • Example 4 A polyurethane elastic thread denier-1 filament elongated by 3.6 times the original length thereof and Nylon-6, denier-24 filaments, under 0.2
  • Polyurethane thread (denier-filament) 40-] 40-] Nylon-6 multi filament (denier-filament) 70-24 70-24 Conditions of processing:
  • Multi-t'ilament adhered to polyurethane elastic thread (number/an optional cross section of the covered elastic yarn) 14 i0 Multi-filament not adhered to polyurethane elastic thread (number/an optional cross section of the covered elastic yarn) 10 I4 Covering property (percent):
  • the covered elastic yarn of the present invention can be obtained by either apparatus emboditween said polyurethane elastic thread and Nylon-6 multi-filament thread, when a weight of 0.5 g was suspended thereon.
  • Polyurethane thread (denier-filament) 40-1 40-1 Nylon-6 multi filament (denier-filament) -24 70-24 Conditions of processing:
  • Multi-filament adhered to polyurethane elastic thread (number/an optional cross section of the covered elastic yarn) l2 0 Multi-filament not adhered to polyurethane elastic read (number/an optional cross section of the covered elastic yarn) I2 24 Covering property (Percent):
  • Example-6 3,300 3,300 2,300 2,300 2,300 2,300 Temperature of heater (C) 195 195 I50 150 190 Length of heater (mm) 900 900 900 900 900 900 Tension of twisting (g) 16 '14 14 14 Tension of untwisting (g)..... 32 32 v 28 28 28 Number of true twist (turns/meter)... 0 0 300 0 0
  • a starwheel type grooved pulley in both Exampleo 20 and in Example 7 however, the covered elastic yarn in accordance with Example-6, in which the temperature of heat setting of false-twisting is the same as that of conventional false twisting methods has a small covering property. Therefore, in order to obtain a covered elastic yarn having excellent covering property, it is preferable that a temperature of the heat setting of false-twisting, as is in Example-6, is higher than that of conventional false-twisting methods.
  • EXAMPLES 8,9, 10,11 AND 12 1.
  • Examples 8 and 9 A polyurethane elasticthread 70'denier-l filament elongated by a 3.6 times the original length thereof and Nylon-6, 70 denier-24 filaments under 0.1g tension were associated with each other, and thereafter ther respective associated filaments were supplied to apparatus of the type shown in FIG. 6 and FIG. 7 and treated under conditions as shown in items EX-8 and EX-9 of Table-8. 40
  • covering property of the covered elastic yarn of Example 8 produced with the apparatus embodiment of FIG. 7 is better than that of the covered elastic yarn of Example 9 produced the apparatus embodiment of FIG. 6.
  • Example 10 On the other hand, threads used in Examples8 and 5 9 were treated by a conventional method.
  • the conventional method used comprises a first step of associating said elastic thread with said thermoplastic multi-filament thread, a second step of pro-twisting said associated threads, a third. step of twisting said threads in the direction opposite to that of the original twist-heat settingand'untwisting said threads in the same direction as that of the original twist.
  • the covering property of said yarnof the present example has somewhat similar property to that of the yarn of the present invention.
  • the reason for said effect is that some of the original twist imparted by the pre-twisting process is retained after twisting-heat setting-untwisting.
  • the elastic thread and the thermoplastic multi-filament thread are not substantially twistless as in the present invention.
  • the covered elastic yarns treated without any pre-wisting process are not always'the same in covering property as the above mentioned result as is apparent from the following examples (Examples 11 and 12).
  • Example 11 The covered elastic yarn of this example was obtained by the method of Example 10', but without any pre-twisting.
  • the elastic thread and thermoplastic multi-filament were substantially twistless, but the covering property thereof was very poor as is apparent from item EX-ll of Table-9.
  • covering properties of 38 (with a weight of 0.5g) and 34 (with a weight of 2.0g) seem to indicate some degrees of covering property, but
  • the yarn obtained by this example is of almost no practical value, because the portions covered therefor uncovered with said thermoplastic multi-filament were randomly distributed along the longitudinal direction of said yarn.
  • Example 12 Furthermore, to make sure of the result reported in Example 11, the method of Example 11 was repeated, but at a heatsetting temperature in the vicinity of Examples 8 and 9. As the result, a covering property of the covered elastic yarn of this example was more excellent than that of Examplefl 1,. but the covering property thereof was not completely perfect, and the coefficient of recovery of elasticity was lower than that of Examples 10 and l l.
  • thermoplastic multi-filament thread and said elastic thread being substantially twistless.
  • thermoplastic multifilament thread wherein said filaments of said thermoplastic multifilament thread are partially adhered to said elastic thread along the longitudinal direction thereof.
  • a covered elastic yarn according to claim 5, wherein said filaments of said thermoplastic multifilament thread disposed about said elastic thread are partially adhered to said elastic thread along the length thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00143940A 1970-05-18 1971-05-17 Covered elastic yarn Expired - Lifetime US3807162A (en)

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DE2207614A DE2207614B2 (de) 1970-05-18 1972-02-18 Falschzwirnmaschine
US405167A US3921382A (en) 1970-05-18 1973-10-10 Method of making a covered elastic yarn

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JP45041579A JPS5028536B1 (enrdf_load_stackoverflow) 1970-05-18 1970-05-18

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US3940917A (en) * 1974-09-05 1976-03-02 E. I. Du Pont De Nemours And Company Composite elastic yarns and process for producing them
US3991548A (en) * 1973-03-16 1976-11-16 Du Pont Of Canada Limited Composite yarns
US4296597A (en) * 1979-07-24 1981-10-27 Teijin Limited Cotton yarn-like textured composite yarn and a process for manufacturing the same
US4375779A (en) * 1981-04-24 1983-03-08 Minnesota Mining And Manufacturing Company Composite sewing thread of ceramic fibers
US5237808A (en) * 1991-12-18 1993-08-24 Unifi, Inc. Method of manufacturing a composite yarn
US5481861A (en) * 1989-05-27 1996-01-09 Jones Stroud & Co. Ltd. Method of making a composite elastic yarn
US6516853B1 (en) 2000-02-01 2003-02-11 Loctite Corporation Apparatus and method for manufacturing elastic hair fasteners
DE10161419A1 (de) * 2001-12-13 2003-06-18 Temco Textilmaschkomponent Verfahren und Vorrichtung zur Herstellung eines Kombinationsgarnes
US20030186610A1 (en) * 2002-04-02 2003-10-02 Tim Peters Elastic hydrophobic/hydrophilic composite yarns and moisture management elastic fabrics made therefrom
US9080265B2 (en) * 2012-11-19 2015-07-14 New Horizon Elastic Fabric Co., Ltd Fabric strap with soft side edges
CN106987945A (zh) * 2017-03-06 2017-07-28 东华大学 细、硬低弹纱主动缠绕粗、软高弹纱制备拉胀复合纱装置
CN107326499A (zh) * 2017-06-09 2017-11-07 东华大学 一种折叠结构变形拉胀纱线的制备方法
US12127964B2 (en) * 2015-12-21 2024-10-29 Thuasne Medical device for supporting at least one region of the body

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EP0468067A1 (en) * 1990-07-24 1992-01-29 Nissinbo Industries, Inc. Yarn for use in setup
JP2593380Y2 (ja) * 1993-03-16 1999-04-05 ワイケイケイ株式会社 テープ状織物の耳部ほつれ防止構造
JP7298190B2 (ja) * 2019-02-28 2023-06-27 東レ株式会社 仮撚複合加工糸および編地

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US3991548A (en) * 1973-03-16 1976-11-16 Du Pont Of Canada Limited Composite yarns
US3940917A (en) * 1974-09-05 1976-03-02 E. I. Du Pont De Nemours And Company Composite elastic yarns and process for producing them
US4296597A (en) * 1979-07-24 1981-10-27 Teijin Limited Cotton yarn-like textured composite yarn and a process for manufacturing the same
US4375779A (en) * 1981-04-24 1983-03-08 Minnesota Mining And Manufacturing Company Composite sewing thread of ceramic fibers
US5560192A (en) * 1989-05-27 1996-10-01 Jones Stroud & Co., Ltd. Composite elastic yarn
US5481861A (en) * 1989-05-27 1996-01-09 Jones Stroud & Co. Ltd. Method of making a composite elastic yarn
US5237808A (en) * 1991-12-18 1993-08-24 Unifi, Inc. Method of manufacturing a composite yarn
US6516853B1 (en) 2000-02-01 2003-02-11 Loctite Corporation Apparatus and method for manufacturing elastic hair fasteners
DE10161419A1 (de) * 2001-12-13 2003-06-18 Temco Textilmaschkomponent Verfahren und Vorrichtung zur Herstellung eines Kombinationsgarnes
US20030186610A1 (en) * 2002-04-02 2003-10-02 Tim Peters Elastic hydrophobic/hydrophilic composite yarns and moisture management elastic fabrics made therefrom
US9080265B2 (en) * 2012-11-19 2015-07-14 New Horizon Elastic Fabric Co., Ltd Fabric strap with soft side edges
US12127964B2 (en) * 2015-12-21 2024-10-29 Thuasne Medical device for supporting at least one region of the body
CN106987945A (zh) * 2017-03-06 2017-07-28 东华大学 细、硬低弹纱主动缠绕粗、软高弹纱制备拉胀复合纱装置
CN106987945B (zh) * 2017-03-06 2019-11-08 东华大学 细、硬低弹纱主动缠绕粗、软高弹纱制备拉胀复合纱装置
CN107326499A (zh) * 2017-06-09 2017-11-07 东华大学 一种折叠结构变形拉胀纱线的制备方法

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GB1349783A (en) 1974-04-10
JPS5028536B1 (enrdf_load_stackoverflow) 1975-09-16

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