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US3698178A - Method of manufacturing textured yarn having trasverse deformities - Google Patents

Method of manufacturing textured yarn having trasverse deformities Download PDF

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Publication number
US3698178A
US3698178A US59065A US5906570A US3698178A US 3698178 A US3698178 A US 3698178A US 59065 A US59065 A US 59065A US 5906570 A US5906570 A US 5906570A US 3698178 A US3698178 A US 3698178A
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Prior art keywords
yarn
fibers
crimped
crimp
heating
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Expired - Lifetime
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US59065A
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English (en)
Inventor
Mutsuo Iwaoka
Akio Takegawa
Hiraku Inoue
Katsusuke Egami
Kouiti Nishikura
Shigeji Yamashita
Tadahiro Nagayasu
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Toray Industries Inc
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Toray Industries Inc
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Priority claimed from JP6729969A external-priority patent/JPS498413B1/ja
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
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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
    • D02G1/0206—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
    • D02G1/0266—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 false-twisting machines
    • 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
    • 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
    • D02G1/024—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 with provision for imparting irregular effects to the yarn
    • 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

  • a method of manufacturing textured yarn comprises providing a crimped yarn composed of numerous crimped and entangled together thermoplastic synthetic fibers, partially removing some of the crimp from the crimped yarn, heating and pressing together the resulting partially crimped yarn to contact the fibers at their mutually intercrossed locations with sufficient pressure and at a sufficient temperature to effect permanent transverse deformation of the fibers at their contact points, and terminating the heating and pressing to obtain a textured yarn composed of numerous fibers having longitudinally and randomly spaced transverse deformities.
  • the yarn is initially crimped by false twisting and steam setting, and some of the crimp is removed from the crimped yarn to remove from 75 to 95 percent of the crimp.
  • Percent Crimp Elongation A specimen textured yarn is left for longer than 24 hours at a temperature of about 20 C and a relative humidity of about 65 percent and subsequently, is treated within a boiling water bath for about 20 min. After drying, the yarn of 20 cm free length is subjected to a loading of 2 mg/denier for 30 sec. and the length (L,,) thereof is recorded. Further, the yarn is subjected to a loading of 100 mg/denier for 30 sec. and the length (L,) is recorded, also. The resulting percent crimp elongation is given by;
  • Percent Crimp Potentialization Provided that the measurement applied to the calculation of the percent crimp elongation is performed as to the specimen yarn in the condition before treatment with the boiling water, percent crimp elongation before the boiling water treatment is designated as A and that after the treatment is designated as B. The resulting percent crimp potentialization is given by;
  • Crimp Dimension Index A componental fiber is extracted from a given crimped yarn for measurement of the length (L) under a load of 2 mg/denier and the number of crimps (N) within that length in that loaded condition. The apparent size of the amplitude of the crimp (U) is also measured in this loaded condition. The specimen fiber is further subjected to a loading of 0.1 g/denier and the length (L) thereof is recorded. The resulting crimp dimension index is then given by; I
  • the technique of providing the material yarn with crimps has been developed.
  • the resulting textile products can be accompanied with a diversified apparent aesthetic effect, bulky touch, wearing comfort and excellent warmness retainability.
  • provision of crimps to the material yarn in the earlier stages of the production process requires a temporary extinction of the once developed crimps in the later stage of the process and thusly extinct crimps have tobe re-developed in the end products.
  • the material yarns cannot be smoothly processed in the manufacturing process. For example, when the once crimped yarns are to be processed through weaving, the yarns have to be sized or strongly twisted prior to the weaving in order to obviate malfunctions caused by an effective potentialization of the crimps is strongly desired.
  • the resulting componental fibers in the yarn are naturally provided with transversely deformed portions distributed periodically along the length thereof.
  • periodicaly disposition of the deformed portions lessen the diversfying effect on the quality of the yarn and cannot perfectly conform to the requirement by the consumers.
  • a principal object of the present invention is to provide a method of manufacturing textured yarn capable of providing the end products made thereof with natural fiber-like diversified functional and aesthetic qualities.
  • Another object of the present invention is to provide a method of manufacturing textured yarn which has an enhanced durability against buckling load to the end product made thereof.
  • Still another object of the present invention is to pro vide a method for manufacturing the textured yarn of above-described nature in a continuous process with considerable increase in the production efficiency.
  • a further object of the present invention is to provide a method for effectively potentializing the crimps imparted to the yarn without employing such additional works as sizing or high twisting, thereby reducing the manufacturing cost of the textile products made up of crimped textured yarns.
  • the textured yarn of the present invention is composed of thermoplastic synthetic fibers of substantially potentially crimpable nature and having numerous transverse cross-sectionally deformed portions distributed at random along the length thereof.
  • the false twisted yarn is subjected to a dry heat pressing at a stretch smaller than the maximum crimp elongation thereof.
  • FIG. I is a diagrammatic representation of a principal embodiment of the arrangement for carrying out the method of the present invention.
  • FIG. 2 is a diagrammatic representation of the crimped yarn internal configuration in an unstretched condition
  • FIG. 3 is a diagrammatic representation of the yarn shown in FIG. 2 under a limited stretch
  • FIG. 4 is a diagrammatic representation of the yarn shown in FIG. 2 under the maximum crimp elongation
  • FIG. 5A is a fragmentary perspective view of the fibers transverse cross-sectionally deformed according to the method of the present invention
  • FIG. 5B is a photographic representation of the actual fibers obtained according to the present invention.
  • FIGS. 6A and 6B are an example of the microscopic representation of transverse cross-sectional profiles of the yarn before and after the heat pressing of the present invention, respectively.
  • FIG. 6C is a photomicroscopic representation of the yarn cross section shown in FIG. 68.
  • FIGS. 7A and 7B are another example of the microscopic representation of transverse cross-sectional profiles of the yarn before and after the heat pressing of the present invention, respectively.
  • FIG. 7C isa photomicroscopic representation of the yarn cross section shown in FIG. 78.
  • FIG. 8 is a graphical representation of the relationship between extent of torque residual in the yarn and extent of stretch in the heat pressing for a nylon yarn processed through the heat pressing of the present invention
  • FIG. 9 is a graphical representation of the relationship between crimp dimension index and the heat pressing temperature for a nylon yarn processed through the heat pressing of the present invention.
  • FIG. 10 is a graphical representation of the relationship between percent crimp potentialization and extent of stretch derived from the results shown in FIGS. 8 and 9,
  • FIG. 11 is a graphical representation of the relationship between degree of bulkiness and heat pressing temperature for the yarn used in the experiment of FIG. 9,
  • FIG. 12 is a graphical representation of the relationship between crimp dimension index and heat pressing temperature for a polyester yarn processed through the heat pressing of the present invention
  • FIG. 13 is a graphical representation of the relationship between degree of bulkiness and heat pressing temperature for the polyester yarn of FIG. 12,
  • FIG. 14 is a graphical representation of the relationship between crimp dimension index and extent of stretch for an acrylic yarn processed through the heat pressing of the present invention
  • FIG. 15 is a graphical representation of the relationship between crimp dimension index and heat pressing pressure for the nylon yarn of FIG. 9,
  • FIG. 16 is a graphical representation of the relationship between crimp dimension index and heat pressing pressure for the polyester yarn of FIG. 12,
  • FIG. 17 is a schematic side view of an embodiment of the heat pressing assembly modified from the one shown in FIG. 1,
  • FIG. 18 is a perspective view of another embodiment of the heat pressing assembly modified from the one shown in FIG. 1,
  • FIG. 19 is a schematic side view of an arrangement to be attached to the one shown in FIG. 1 for an additional crimp potentialization effect.
  • a non-crimped material yarn 1a composed of thermoplastic synthetic fibers is drawn out from a supply package 2 and advanced to a steam heater 7 via a pig-tail guide 3, a feed roller assembly 4 and a guide roller 6 located upstream of the steam heater 7.
  • the steam heater 7 is provided with a circulation of saturated steam under pressure and the yarn la is wet heated during passing through the steam heater 7.
  • a false twist spindle assembly 8 is taken up from the false twisting zone by the first take-up roller 11 via guide rollers 9 in the form of a crimped yarn 1b.
  • the crimped yarn lb is processed to a dry heat pressing operation by a heat pressing assembly 12, which assembly includes, in the shown example, a heated drum 13 and a pair of press rollers 14a and 14b in a peripheral pressure contact with the peripheral surface of the heated drum 13.
  • a heat pressing assembly 12 which assembly includes, in the shown example, a heated drum 13 and a pair of press rollers 14a and 14b in a peripheral pressure contact with the peripheral surface of the heated drum 13.
  • the crimp poten? tialized yarn 1c is taken up onto a package 17 by a winding-up drum 16 via the second take-up rollers 15.
  • the operations from the supply package 2 to the false twisting by the false twist spindle assembly 8 are performed in known manners.
  • the relationship between the surface speeds of the 1st take-up roller 11, the heated drum l3 and the second take-up roller 15 is so selected as to stretch the crimped yarn 1b to an extent smaller than the maximum crimp elongation of the crimped yarn 1b.
  • the individual fibers in the crimped yarn 1b is subjected to the dry heat pressing in a disposition shown in FIG. 2, in which disposition the individual fibers still retain to some extent a crimped condition.
  • the individual fibers in the yarn 1b are subjected to the heat pressing operation while retaining their crimped condition to some extent. This is the very important and characteristic feature of the art of the present invention.
  • the fibers are pressed in a direction substantially perpendicular to their longitution in the configuration of the yarnbecause the yarn is supplied to the heat pressing in an imperfectly stretched condition.
  • the yarn is perfectly stretched to the maximum crimp elongation
  • the fibers in theyarn configuration are put in a substantially and lengthwisely straightened disposition as shown in FIG. 4 and there can be almost no interfiber crossing as is in the case of the present invention.
  • This is the usual case with the conventional processof the transverse crosssectional deformation by heat pressing.
  • the enhanced orientation of the componental fibers in the yarn configuration by the perfect stretching results in poor inter-fiber crossing superimposition.
  • FIG. 5A an example of the fibers locationally deformed in their transverse cross sections according to the method of the present invention is shown, wherein the fibers 19 are provided with transverse cross-sectionally deformed portions 21 at random along the length thereof. This is also confirmed through reference to V the photographic representation shown in FIG. 5B.
  • the componental fibers are provided with. a trilobate transverse cross-sectional profile and, through the application of the dry heat pressingoperation, the profiles are apparently deformed.
  • the fibers having a trilobate transverse cross section are most suitable for use of the end product for mattings such as carpets, when the fibers are treated by the method of the present invention.
  • the method of the present invention can be applied to the fibers of other transverse cross-sectional profiles with desirable results.
  • the dry heat pressing is the key element in the method of the present invention and the resultant quality of the yarn is majorly dependent upon the processing conditions in this dry heat pressing operation such as the extent of stretch, the temperature at the pressing in relation to the temperature in the foregoing steam heating and the pressure applied to the yarn during the heat pressing.
  • crimp dimension index is a measure for indicating the dimensional feature of the crimps possessed by the relevant fiber.
  • the fiber When the value of the crimp dimension index is equal to l, the fiber is provided with crimps of perfectly twodimensional configuration whereas, when the value of the crimp dimension index is equal to 1r/2, the fiber is provided with crimps of perfectly three-dimensional configuration. It is empirically confirmed that the appearance of the end products made up of the yarn is considerably degraded when the value of the crimp dimension index exceeds 1.32. So, it is desirable that the value of the crimp dimension index possessed by the fibers composing the yarn of the present invention should not exceed 1.32.
  • the threedimensional configuration of the crimps are considerably lost when the value of the crimp dimension index is smaller than 1.1. So, in order to provide the yarn of the invention with moderate bulkiness, it is desirable that thevalue of the crimp dimension index possessed by the componental fibers should be 1.1 or larger. In conclusion, the preferable crimp dimension index to be possessed by the fibers composing the yarn of the present invention should be in a range from 1.1 to 1.32.
  • the relationship between the crimp dimension index and the heat pressing temperature additional to steam heating temperature is shown in FIG. 9 for various per.- cent stretch, the former being taken on the ordinate and the latter being taken on the abscissa.
  • the curve a is for 75 percent stretch
  • the curve b is for percent
  • the curve 0 for percent
  • the curve f for percent stretch.
  • a nylon yarn of 840/3 denier fineness containing filaments was processed firstly to false twisting operation at a temperature of 137 C and a loading of 0.12 g/denier for 0.75 second.
  • the number of the imparted false twists was 1,000 TPM.
  • the yarn was processed to the heat pressing operation of the present invention for 0.33 second at a pressure of 2.4 g/denier.
  • the fibers composing the material yarn fused to each other when the heat setting temperature exceeded 70 C above the steam heating temperature and the crimps were perfectly eliminated from the fibers, thereby the compression elasticity of the end product made of the yarns being considerably lowered.
  • the heat pressing temperature became lower than the steam heating temperature, crimp dimension index exceeded the above mentioned upper limitvalue, thereby the appearance of the end product being lowered and torque being retained in the yarn obtained.
  • the heat'pressing operation is advantageously carried out at a percent stretch from 75 to 95 percent of the maximum crimp elongation and a temperature higher than the steam setting temperature by from to 80 C more preferably from 10 to 70 C. This is clearly confirmed through reference to the graphical representation given in FIG. 10, wherein percent crimp potentialization is taken on the ordinate and extent of stretch in the heat pressing in is taken on the abscissa.
  • the curve a is for the heat pressing temperature higher than the foregoing steam heating temperature by 0 C
  • the curve b for 10 C the curve 0 for 20 C
  • the curve d for 30 C the curve e for C
  • the curve f for C the curve g for C.
  • the percent crimp potentialization can be maintained larger than 40 percent when the percent stretch is in a range from 75 to 95 percent and the temperature is higher than the steam heating temperature by from 0 to C.
  • FIG. 10 was derived from the results shown in FIGS. 8 and 9.
  • relationship between the degree of bulkiness and the heat pressing temperature is shown in FIG. 11 for the nylon yarn tested in the experiment of FIG. 9.
  • the curve a is for percent stretch, the curve b for percent stretch, the curve c for percent stretch, the curve d for percent stretch, the curve e for percent stretch and the curve f for percent stretch.
  • the confirmative experiment was carried out concerning the polyester yarn also as shown in FIG. 13, wherein crimp dimension index is taken on the ordinate and heat pressing temperature additional to steam heating temperature is taken on the abscissa.
  • the curve a is for 70 percent stretch in the sense abovementioned
  • the curve b for 80 percent stretch
  • the curve 0 for 95 percent stretch
  • the curve d for 100 percent stretch.
  • a polyester yarn of 1,000 denier fineness containing 96 filaments was processed to the false twisting operation for 0.8 second at a temperat ure of 165 C and a loading I of 0.1 g/denier.
  • the number-of the false twists was 1,000 TPM.
  • the yarn was further processed to the heat pressing operation for 0.35 second at a pressure of 4 g/denier.
  • the temperature higher than 80 C above the steam setting temperature causes considerable lowering in the strength of the yarn manufactured whereas the temperature lower than the steam setting temperature leads to undesirable increase in the crimp dimension index.
  • the heat pressing assembly is provided with two sets of press rollers 14a and 14b in a peripheral pressure contact with the heated drum 13.
  • the number of press rollers can be selected as desired.
  • the assembly is provided with three sets of press rollers 14a, 14b and 140.
  • a modification of the assembly derived from this conception is shown in FIG.
  • the assembly includes the heated drum 13, a rotational roller 22 mounted at a selected distance apart from the heated drum 13, a pair of heated plates 23 located in between the two elements 13 and 22 and a press roller 24 mounted in a peripheral contact with the heated plate 23.
  • the crimped yarn lb is advanced as shown with an arrow and wound for several times in contact around the elements 13, 22 and 23. During this circulation, the yarn is pressed onto the heated surface of the heated plate 23 by the press roller 24 and is issued from the assembly in the form of the crimp potentialized yarn towards the package (not shown).
  • the dry heat pressing operation employed in the'present invention has two technical effects on the yarn to be processed, one being transverse cross-sectional deformation of the componental fibers and the other being the potentialization of the crimps once formed on the componental fibers.
  • an additional process for ascertaining this additional potentialization can be introduced into the arrangement shown in FIG. 1.
  • FIG. 19 one embodiment of such an additional arrangement is shown, which arrangement should be inserted in between the second take-up rollers and the winding up stage onto the package 17.
  • the third take-up rollers 27 having a surface speed to some extent faster than that of the second take-up rollers is provided at a location just upstream of the package 17.
  • an additional heater 26 In between the two sets of take-up rollers 15 and 27, there is provided an additional heater 26.
  • the additional heater 27 may be formed either in the direct contact type or indirect heating type. However, in the practical yarn manufacturing, the additional heater 27 should preferably be formed in the indirect heating type for obviation of the undesirable tension effect on the processed yarn by abrasive contact with the heating surface. Because the surface speed of the third take-up rollers 27 is selected to some extent faster than that of the 2nd take-up rollers 15, the yarn 10 can be put in a stretched condition during this additional heating process. The above-described difference in the surface speeds should be so selected that the stretch is me range from the stretch in the heat pressing and the maximum crimp elongation, thereby potentialization of the crimps imparted to the fibers can be accomplished perfectly.
  • the temperature to be employed in this additional heating process should be pertinently selected so that the resultant percent crimp potentialization of the fiber composing the acquired yarn should be 40 percent or larger.
  • Nylon multifilamentary yarn of 840 total denier containing 45 monofilaments was processed through the arrangement shown in FIG. 1 attached with the arrangement shown in FIG. 10 under three different processing conditions listed in Table 1. Aside from this, same type of material multifilamentary yarns were processed, prior to the dry heat pressing stage, through the conventional Italian throwing machine and a false twisting operation with application of dry heating under the processing conditions listed in Table 1, respectively.
  • the value of the percent stretch means the length of the fiber under stretch with respect to the length thereof under the maximum crimp elongation.
  • Crimp dimension index 1.24 Percent crimp potentialization 45 Degree of bulkiness in cm lg 21.4
  • the yarn when the yarn is purposed for use in carpets as the pile yarns, the yarn is required to have crimps whose number is defined by the following formula.
  • N number of crimps per 30 mm maximum crimp elongation.
  • N Number of crimps per 30 mm maximum crimp elongation of the yarn processed through the steam heat false twisting.
  • N Number of crimps per 30 mm maximum crimp elongation of the yarn processed through the dry heat false twisting.
  • the steam heating can provide the resultant yarn with larger number of crimps than that provided by the dry heating.
  • this decrease in the fineness of the material filament is accompanied with undesirably decrease in the amplitude of the crimps developed on the resultant yarn and the obtained yarn is not crimped suitably for use as a material for carpet piles.
  • a method of manufacturing textured yarn comprising: providing a crimped yarn composed of numerous crimped and entangled together thermoplastic synthetic fibers; partially removing only some of the crimp from said crimped fibers to obtain a partially crimped yarn composed of partially crimped fibers mutually intercrossed and entangled with each other at longitudinally spaced random locations along the length of the fibers; heating and pressing together said partially crimped fibers to contact the fibers at their mutually intercrossed locations with sufficient pressure and at a sufficient temperature to effect permanent transverse deformation of the fibers at their contact points; and terminating the heating and pressing together of thedeformed fibers to obtain a textured yarn composed of numerous fibers having longitudinally and randomly spaced transverse deformities.
  • heating and pressing step includes applying sufficient force to said partially crimped fibers in a direction substantially transverse to the partially'crimped yarn axis to transversely deform the fibers at their contact points into mutually flattened portions.
  • said partially removing step comprises longitudinally stretching said crimped yarn at a stretch effective to remove only some of the crimp from said crimped fibers.
  • said longitudinally stretching step comprises longitudinally stretching said crimped yarn at a. stretch sufficient to remove to 95 percent of the crimp from said crimped yarn.
  • heating and pressing step includes pressing said partially crimped fibers at least once against a heated surface.
  • said providing step comprises providing a yarn composed of numerous thermoplastic synthetic fibers, and false twisting said yarn to impart crimps to the fibers accompanied by steam-setting the crimped fibers at a given temperature to form crimped yarn; wherein said partially removing step comprises longitudinally stretching said crimped yarn at a stretch effective to remove only some of the crimp from said crimped fibers; and wherein. said heating and pressing step. includes pressing'the stretched yarn at least once against a heated surface to effect heating thereof to a temperature higher than said given temperature.
  • said partially removing step comprises longitudinally stretching said crimped yarn at a stretch sufficient to remove 75 to 95 percent of the crimp from said crimped yarn; and wherein said heating and pressing step includes heating said stretched yarn to a temperature 10 to 70 C. higher than said given temperature.
  • said false twisting step comprises first false twisting said yarn in one direction during one stage of false twisting and then false twisting the twisted yarn in the opposite direction during a second stage of false twisting.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US59065A 1969-08-27 1970-07-29 Method of manufacturing textured yarn having trasverse deformities Expired - Lifetime US3698178A (en)

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JP6729969A JPS498413B1 (de) 1969-08-27 1969-08-27
JP859670 1970-02-02

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US (1) US3698178A (de)
CA (1) CA921344A (de)
CH (1) CH537471A (de)
DE (1) DE2042591A1 (de)
FR (1) FR2059225A5 (de)
GB (1) GB1320583A (de)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
US4523428A (en) * 1980-11-21 1985-06-18 Toray Industries, Inc. Process for manufacturing textured multifilament yarn having alternating twist
US4682465A (en) * 1983-12-07 1987-07-28 Toray Industries, Inc. False-twist textured yarn of polyamide
CN114232157A (zh) * 2021-12-24 2022-03-25 江苏恒力化纤股份有限公司 一种降低加弹生产过程中预网络区丝束张力的方法
US20230081877A1 (en) * 2020-05-01 2023-03-16 Atex Technologies, Inc. Fray resistant structure

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
GB8607326D0 (en) * 1986-03-25 1986-04-30 Carding Spec Canada Modifying yarn
TW510928B (en) * 2000-09-14 2002-11-21 Toray Du Pont Kk Manufacture method of heat-resistant shrinkable thread
EP3822398A4 (de) * 2018-07-11 2022-03-16 Kaneka Corporation Polyesterbasierte faser und polstofftuch mit verwendung davon und verfahren zur jeweiligen herstellung dieser produkte

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US2202031A (en) * 1937-02-27 1940-05-28 Du Pont Method of treating yarn
GB884492A (en) * 1959-06-16 1961-12-13 British Nylon Spinners Ltd Improvements in or relating to the heat treatment of yarns
US3129485A (en) * 1961-06-30 1964-04-21 Bancroft & Sons Co J Production of novelty bulked yarn
US3137119A (en) * 1961-06-14 1964-06-16 Chavanoz Moulinage Retorderie Process for the production of high bulk yarns
US3221385A (en) * 1961-05-24 1965-12-07 Techniservice Corp Strand streatment
US3431716A (en) * 1964-10-16 1969-03-11 American Enka Corp Process for producing a crimped multifilament yarn

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202031A (en) * 1937-02-27 1940-05-28 Du Pont Method of treating yarn
GB884492A (en) * 1959-06-16 1961-12-13 British Nylon Spinners Ltd Improvements in or relating to the heat treatment of yarns
US3221385A (en) * 1961-05-24 1965-12-07 Techniservice Corp Strand streatment
US3137119A (en) * 1961-06-14 1964-06-16 Chavanoz Moulinage Retorderie Process for the production of high bulk yarns
US3129485A (en) * 1961-06-30 1964-04-21 Bancroft & Sons Co J Production of novelty bulked yarn
US3431716A (en) * 1964-10-16 1969-03-11 American Enka Corp Process for producing a crimped multifilament yarn

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523428A (en) * 1980-11-21 1985-06-18 Toray Industries, Inc. Process for manufacturing textured multifilament yarn having alternating twist
US4682465A (en) * 1983-12-07 1987-07-28 Toray Industries, Inc. False-twist textured yarn of polyamide
US4773206A (en) * 1983-12-07 1988-09-27 Toray Industries, Inc. False-twist textured yarn of polyamide and method and apparatus for producing the same
US20230081877A1 (en) * 2020-05-01 2023-03-16 Atex Technologies, Inc. Fray resistant structure
US12252814B2 (en) * 2020-05-01 2025-03-18 Atex Technologies, Inc. Fray resistant structure
CN114232157A (zh) * 2021-12-24 2022-03-25 江苏恒力化纤股份有限公司 一种降低加弹生产过程中预网络区丝束张力的方法

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CA921344A (en) 1973-02-20
FR2059225A5 (de) 1971-05-28
CH537471A (de) 1972-11-30
DE2042591A1 (de) 1971-05-27
GB1320583A (en) 1973-06-13

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