US3495393A - Non- or low-stretch composite yarn of super high bulk - Google Patents

Non- or low-stretch composite yarn of super high bulk Download PDF

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Publication number
US3495393A
US3495393A US710138A US3495393DA US3495393A US 3495393 A US3495393 A US 3495393A US 710138 A US710138 A US 710138A US 3495393D A US3495393D A US 3495393DA US 3495393 A US3495393 A US 3495393A
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Prior art keywords
yarn
core
cover
filament
covering
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US710138A
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Osamu Wada
Yoshiyuki Sasaki
Masaaki Tomiji
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Teijin Ltd
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Teijin Ltd
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Priority claimed from JP1967042252U external-priority patent/JPS454377Y1/ja
Priority claimed from JP1967043351U external-priority patent/JPS454378Y1/ja
Priority claimed from JP1967043353U external-priority patent/JPS454380Y1/ja
Priority claimed from JP1967043352U external-priority patent/JPS454379Y1/ja
Application filed by Teijin Ltd filed Critical Teijin Ltd
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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
    • D02G3/36—Cored or coated yarns or threads
    • D02G3/367—Cored or coated yarns or threads using a drawing frame

Definitions

  • This invention relates to a. nonor low-stretch composite yarn of super high bulkiness, and a process of producing said composite yarn.
  • inelastic yarn refers to any monoor multifilament yarn crimped or not of fibre except polyurethane and rubber, and spun yarn of the same fibre.
  • such fibres include polyester fibre, polyamide fibre, polyacrylonitrile fibre, polyvinyl chloride fibre, polypropylene fibre, glass fibre, steel fibre.
  • the term crimped yarn refers to any synthetic filament yarn crimped by the presently known process such as twisting and setting techniques, false twisting, stutfer box, or any other producer texturing.
  • the well known crimped yarn has a feature of soft feeling by which it has been advantageously and beneficially applied in some commercial field.
  • the inherent insufficiency of liveliness when fabricated in apparel form is now a problem precluding it from a wider application in commercial field for which a solution is continuously demanded.
  • Any suitable liveliness of crimped yarn may be attained as desired by increasing its denier in successive steps to increasing degree of fineness, but contrary to this, as the liveliness increases, the soft feeling inherently possessed by the crimped yarn disadvantageously decreases.
  • the crimped yarn has a defect such that the crimp cannot remain in bulky state due to excess tension throughout many steps of manufacturing process for fabricating.
  • the present invention is directed to a composite yarn in which a. majority of the liveliness is borne by the core and the soft feeling by the covering yarn mainly, so that a resulting yarn may have both liveliness and soft feeling.
  • the present invention is characterized by the fact that the cover is tensioned and relaxed consecutively and immediately; both core and cover are gathered and finally twisted so that the cover is wrapped around the core with each, filament in a series of helical turns to form a nonstretch 0r low-stretch composite yarn of super high bulk; and that the cover is overfed relative to the core during the operation so that significant bulkiness can be obtained.
  • Another object of the invention is to provide a process of producing said composite yarn.
  • FIGS. 1(a) and (b) are two schematic views taken on the opposite side of each other, greatly enlarged of yarn embodying the invention.
  • FIGS. 2 to 7 are schematic views illustrating various modified apparatuses for practicing the process of the invention.
  • FIG. 1 a composite yarn is shown in FIG. 1, which yarn includes a core 1 around which a covering yarn is wrapped with each filament in a series of helical turns and in bulged state so that an unusual bulkiness in achieved.
  • Any textile fibre available in staple or filament form may be used as a core yarn regardless of whether crimped or not.
  • Such fibres include natural fibres such as cotton and wool, and synthetic fibres such as polyester fibre, nylon fibre, polyvinyl chloride fibre, and such mineral fibre as glass fibre and steel fibre.
  • any filament available in crimped form may be included and any operation by which the crimp is originally formed may be applied such as the texturing, stutfer box, gear crimping, torque crimping, edge crimping, or any other crimping process.
  • the use of each filament of the core in a denier not less than twice that of the cover filament has been found beneficial in achieving the yarn.
  • the election of fineness of the core filament has been found beneficial in limiting it in denier from 4 to 20.
  • Any synthetic yarn available in crimped form may be used as the cover filament, and election of fineness of the filament is found suitable in limiting it in a denier less than 5.
  • the composite yarn resulting from the practice of this invention has both higher bulkiness and liveliness, provided that the final twist and the rate of the cover overfeed are suitably and reasonably regulated as the case requires. For example, it is found that when each filament of the core yarn is in a denier less than 4 or more than 20, the intended liveliness can not be expected. It is also found that when the filament of the cover is in a denier more than 5, the intended soft feeling cannot be expected.
  • the cover filaments are longer by about 10 to 200% preferably from 10 to 50% than that of the core in the unit length of the resulting composite yarn so that the cover is facilitated to cover the core. IIf the excess of cover length falls below 10% relative to the core length in the unit length of the resulting yarn, covering throughout the full length of the core is found insufficient, or if it falls above 200% the sheath formed by the covering yarn is also found loosened and appearance injured to such a degree as not commercially applicable. Limitation of that excess is beneficially controlled in the range of from 10 to 50% relative to the core. Crimped yarns made by twisting and setting techniques may be advantageously used as a core to preclude the cover from sliding thereon and bulkiness can be additionally obtained by the core. The use of 2 to 3 filaments with each filament in a denier from 10 to 20, has been found best in bringing about liveliness, and the use of core in total denier from 50 to and cover in total denier 75 to is best for bulkiness.
  • FIG. 2 there is shown an apparatus for producing a composite yarn in accordance with this invention by twisting method.
  • a core yarn 1 advances through a pair of nip rolls 3 from any package not illustrated and the covering yarn 2 advances from also any package not illustrated, through the back pair of drafting rolls 4, and thence through intermedaite pair of rolls 5 to the front pair of rolls 6.
  • the linear speed of the intermediate pair of rolls 5 is greater than that of the back pair of rolls 4 so that covering yarn is tensioned when passing the zone defined by the back pair and intermediate pair.
  • the tension load falls within the range of from 0.5 to 2.5 gram per denier wherein the elongation falls generally within the range of from 1.5 to 12% relative to the original length.
  • the covering yarn 2 advances in at an angle to the core axis at a faster speed than that of the core yarn to facilitate wrapping the cover therearound.
  • the core and cover pass together through a snail wire 7, a ring traveller 9 and then are wrapped around the bobbin 10 to form a package 11 thereon.
  • the core and cover are finally twisted together and cover 2 is twisted therearound by rotating the bobbin through a driven pully mounted on the spindle not illustrated.
  • the ring traveller 9 is slidably mounted for rotation on a vertically movable ring rail so that the ring traveller can move up and down with relation to the bobbin 10 to build up a package 11 thereon. Twist in turns per meter from 50 to 1500 is applied to the composite yarn.
  • the linear speed of the front pair of rollers 6 is reasonably less than that of the intermediate pair of rolls 5, so that each of the covering filaments may be permitted to be bulged outwardly to present a significantly higher bulkiness.
  • each filament of the covering yarn disperses to achieve a higher bulged state than that expectable from an inherent one.
  • FIG. 3 is shown another type of apparatus for practicing this invention, in which the front pair of rolls 6 additionally operates as a core feeding pair of rolls, and accurate doubling or gathering of two yarns can be achieved. It is further found that the location of the core can be defined accurately near the axis of the cover at the nip of the front pair during the process. This prevents the core yarn from being displaced from the center of the resulting yarn to the outside of the yarn.
  • the apparatus in FIG. 4 shows the foregoing apparatus in which the twisting is separately performed late after the core and cover have been doubled.
  • the process practiced in such manner has been found beneficial in preventing the crimped cover yarn from being tensioned when the cover is unwound from package for final twisting, since a majority of the unwinding load is borne by the core yarn 1. Also it is found that when the yarn 1 and 111 are unwound from the package on bobbin 110, it is beneficial to brake the yarn at the let-off position for preventing the core and cover from being separated from each other during the unwinding.
  • the apparatus B in FIG. 4 differs from apparatus A in the manner in which the front pair of feed rollers is used for feeding not only the cover but the core in order to achieve accurate maintenance of the core in center axis of the cover during the process.
  • FIG. 5 there is shown modified apparatus to produce the yarn of this invention.
  • this apparatus two core yarns are separately fed and the covering yarn enters the doubling and twisting point so that the rate of over feed of the cover may be advantageously increased, even though a smooth monofilament yarn is used as core.
  • the rate of the over feed of 10% can be easily obtained, while the 10% rate is found to be the difficult upper limit when the two monofilaments are previously doubled and twisted prior to this operation.
  • the covering yarn may not be gathered only at the doubling point of the core yarns, but at any point on one of the core yarns from the gathering point to feed roll 3.
  • the covering yarn is preferably wrapped around the core yarn by the action of torque of the core yarn transmitted from the doubling point.
  • FIG. 6 there is shown another modified apparatus to practice the process of this invention.
  • the bottom roller 3' of the feed rolls dips its lower portion into any adhesive agent in a tank 3", so that the core may be wetted with the agent when it passes through the nip of the feed rolls.
  • Such manner of operation has been found beneficial in lessening the number of twist turns in unit length of the resulting yarn and in preventing the cover from sliding on the core.
  • any material having a low melting temperature may be advantageously used together with the core yarn so that adhesion may be effected between the core and cover by heating prior to the gathering.
  • FIG. 7 there is shown a further modified apparatus for practicing the process of this invention.
  • a pair of fluted rolls are used as a pair of feed rolls so that the core is crimped and slippage of the cover can be prevented during the twisting operation.
  • One of the most preferred embodiments of this invention is a process for preparing a low stretch high-bulk yarn, characterized in that there are used a crimped bulky multi-filament yarn as the cover in which the individual filaments are dispersed and which is obtained by twisting in the S direction (or Z direction) heat-setting and untwisting and a crimped multi-filament yarn as the core having a mono-filament denier twice or more as large as that of the first-mentioned yarn and obtained by twisting in the opposite direction, namely, Z (or S) direction, heat-setting and untwisting, the length of the former yarn being 10-200% larger than the latter; the former yarn is positioned on the surrounding portion and the latter yarn, at the center; and that they are imparted a twist of 501500 turns per meter in the same direction as that of twisting of the latter yarn, namely, Z (or 5) direction.
  • a composite yarn obtained according to this process is bulky and exhibits liveliness because a torque crimped yarn having thick monofilaments is used as a core. It also possesses a soft feel because of the use of a torque crimped yarn having thin monofilaments as a covering yarn.
  • the core yarn having substantially a larger torque than the covering yarn when twisted together with the covering yarn, is twisted in the direction of twisting the core yarn, namely in the direction of less torque.
  • a yarn having low torque is obtained.
  • Another of the most preferred embodiments of this invention is a process for preparing a low stretch highbulk yarn, characterized in that there are used a crimped bulky multi-filament yarn as the cover in which the individual filaments are dispersed and which is obtained by twisting, in the S direction (or Z direction) heat-setting and untwisting and a crimped multi-filament yarn as the core having a monofilament denier twist or more as large as that of the first-mentioned yarn and having the number of monofilaments less than A1 of those of the firstmentioned yarn, which is obtained by twisting in the opposite direction, namely, Z (or S) direction, heat-setting and untwisting, the length of the former yarn being -200% larger than the latter; the former yarn is positioned on the surrounding portion and the latter, at the center; and that they are imparted a twist of 50-1500 turns per meter in the opposite direction to that of twisting of the latter yarn, namely, S (or Z) direction
  • the twist is imparted in the direction opposite to that of twisting the core yarn with a purpose of overtwisting the core yarn. Then the core yarn becomes very bulky, and it is possible to obtain a bulky composite yarn.
  • EXAMPLE 1 A 45-denier/3-filament false twisted polyester yarn (Z torque) was used as core yarn, and covered with a 100- denier/48-filament false-twisted polyester yarn (Z torque). With an apparatus in FIG. 3, prior to covering the covering yarn had been widened to a width of about 7 mm. in a direction at right angle to the yarn axis by elongating it by 5% and relaxing it to put it under no tension. The covering yarn was over-fed by 3% relative to the core yarn, and the core yarn was fed into the center portion of the covering yarn. Alow stretch super highbulk yarn was obtained by imparting them a final twist of 600 turns per meter in the Z direction. Two of such low stretch super high bulky yarns were doubled, and imparted a final twist of 480 turns per meter in the S direction to make a material for woven fabric.
  • a woven fabric of a matt weave was prepared from the said yarn, and subjected to an ordinary finishing process such as scouring, relaxing, heat-setting, dyeing and again heat-setting. It exhited the properties as shown in the following table.
  • a woven fabric was prepared from ordinary false-twisted yarns by using the same technique both in weaving and in finishing.
  • the said ordinary false-twisted yarn was prepared by imparting a twist of 200 turns per meter in the Z direction to a 150-denier/48-filanient (Z torque) polyester yarn, and imparting a final twist of 160 turns per meter in the S direction to two of such polyester yarns doubled.
  • the woven fabric from the yarns of the present invention is very rich in bulkiness, and excellent in liveliness. It is impossible to give a definite measured value to the liveliness since the liveliness is of a sensuous amount. It is generally said however that the liveliness is excellent when the bending stifiness is appropriate and the bending recovery is good.
  • the woven fabric according to the present invention was far more soft and excellent hand than the woven fabric prepared from the ordinary false-twisted yarns.
  • EXAMPLE 2 A Z torque -denier/8-filament false-twisted polyester yarn was used as a core. Using the apparatus in FIG. 2, an S torque -denier/48-filament false-twisted polyester yarn was over-fed by 20% relative to the core yarn in the same manner as Example 1, and a twist of 300 turns per meter was given in the Z direction. Thus, a low stretch high bulk yarn was obtained which had a very low torque, balance being maintained by the sum of Z torque of the core yarn, S torque of the covering yarn and S torque generated at the time of twisting.
  • EXAMPLE 3 A 40-denier/2-filament polyester yarn was used as a core yarn.
  • a 75-denier/36- filament false-twisted polyamide yarn having a triangular cross section as a covering yarn was over-fed by 30% relative to the core yarn, and a twist of 200 turns per meter was given.
  • a non-stretch high bulk yarn was obtained.
  • the covering yarn Prior to covering, the covering yarn had been elongated by 10%, and relaxed to put it under no tension.
  • the covering yarn was fed into a point where two core yarns intersect each other. They were twisted together while part of the covering yarn is being held between two core yarns, and were associated tightly into a covered yarn.
  • the obtained yarn was rich in bulkiness, and has a soft feeling and unique luster. It was suitable as a material for woven fabrics.
  • EXAMPLE 4 Using the apparatus in FIG. 4, a low stretch high bulk yarn was prepared in the same manner as in Example 1 using a 75-denier/15-filament false-twisted yarn as a core and a 100-denier/36-filament side-by-side type conjugate filament yarn composed of a polyethylene terephthalate resin and a polyethylene naphthalate resin as a cover.
  • EXAMPLE 5 A spun yarn of 64S (metric count) from cut staples of polyethylene terephthalate (4d, 76 mm.) was used as a core, and a false-twisted -denier/48-filament polyethylene terephthalate was used as a covering yarn. Using the apparatus in FIG. 6, powder of polyethylene terephthalate with which 35 mole percent of isophthalic acid had been copolymerized was added to the surface of the core yarn, and was fed to the covering yarn which had been over-fed by 70% relative to the core.
  • a non-stretch high bulk yarn was obtained by covering in the same manner Woven fabric prepared from the yarns of the ordinary the present false-twisted Direction Unit invention yarns arpends/ineh 74 74 Weft Picks/inch. 72 72 Thickness. Mm. 0. 51 0. 46
  • a composite yarn which is non-stretch or low stretch and having super high bulkiness said yarn comprising at least a core yarn and at least a covering yarn; said core yarn including at least an inelastic filament, said covering yarn consisting of a plurality of crimped filaments surrounding the core with each filament in a series of helical turns and in a dispersed state, the denier of singie filament of the core yarn being at least twice that of a single filament of the covering yarn.
  • the composite yarn of claim 1 wherein the core consists of crimped filaments made by twisting and heatsetting techniques.
  • the composite yarn of claim 1 wherein the core consists of a plurality of filaments with each filament having a denier from 4 to 20 and the cover consists of a plurality of crimped filaments with each filament having a denier less than 5, and the length of the cover is from 10 to 50% larger than that of the core in the unit length of the resulting yarn.
  • the composite yarn of claim 6 wherein the core consists of from two to three crimped filaments with each filament having denier from 4 to 20, and the cover consists of a plurality of crimped filaments with each filament having a denier less than 5; and the length of the cover is from to 50% larger than that of the core so that the cover may be wrapped around the core.
  • the core yarn and cover yarn consist of a plurality of crimped filaments originally produced by twisting and setting techniques, the original twists of said filaments being in opposite directions to each other, the length of the cover relative to the core being greater by an amount of from 10 to 200%, the core filament being larger than that of the cover filament, and the final twist being in the same direction as that of the original twist of the core and in the range of -1500 turns per meter.
  • both core yarn and cover yarii consist of a plurality of crimped filaments originally produced by twisting and setting techniques; the directions of the original twisting ⁇ being in opposite directions to each other, the length of the cover relative to the core being greater by an amount of from 10 to 200%; the core filament being more than twice as iarge as the cover filament, and the final twist being in the same direction as that of the original twist of the cover and in the range of 5 0-15 00 turns per meter.
  • a fabric containing non-stretch composite yarns of super high bulk said composite yarns comprising at least a core yarn and at least a covering yarn, said core yarn including at least an inelastic filament, said covering yarn consisting of a plurality of crimped filaments surrounding the core with each filament in a series of helical turns and in a dispersed state, the denier of a single filament of the core yarn being at least twice that of a single filament of the covering yarn.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US710138A 1967-03-08 1968-03-04 Non- or low-stretch composite yarn of super high bulk Expired - Lifetime US3495393A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP1464467 1967-03-08
JP1464367 1967-03-08
JP1464167 1967-03-08
JP1967042252U JPS454377Y1 (enrdf_load_stackoverflow) 1967-05-19 1967-05-19
JP1967043351U JPS454378Y1 (enrdf_load_stackoverflow) 1967-05-23 1967-05-23
JP1967043353U JPS454380Y1 (enrdf_load_stackoverflow) 1967-05-23 1967-05-23
JP1967043352U JPS454379Y1 (enrdf_load_stackoverflow) 1967-05-23 1967-05-23

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US3495393A true US3495393A (en) 1970-02-17

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US710138A Expired - Lifetime US3495393A (en) 1967-03-08 1968-03-04 Non- or low-stretch composite yarn of super high bulk
US838203A Expired - Lifetime US3596459A (en) 1967-03-08 1969-07-01 Process of producing a nonstretch or low-stretch composite yarn of super high bulkiness

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US838203A Expired - Lifetime US3596459A (en) 1967-03-08 1969-07-01 Process of producing a nonstretch or low-stretch composite yarn of super high bulkiness

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US (2) US3495393A (enrdf_load_stackoverflow)
CH (1) CH469109A (enrdf_load_stackoverflow)
FR (1) FR1564060A (enrdf_load_stackoverflow)
GB (2) GB1224554A (enrdf_load_stackoverflow)

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US3631666A (en) * 1970-01-15 1972-01-04 Hercules Inc Method of preparing blended yarns
JPS509428Y1 (enrdf_load_stackoverflow) * 1970-06-30 1975-03-22
US3955952A (en) * 1974-03-18 1976-05-11 Ppg Industries, Inc. Method of making a slubby strand
US4719744A (en) * 1982-06-07 1988-01-19 Burlington Industries, Inc. Vacuum spinning method
US4802330A (en) * 1987-01-20 1989-02-07 E. I. Du Pont De Nemours And Company Combined carpet yarns by open end rotor spinning
US5203939A (en) * 1991-08-05 1993-04-20 Coats Viyella, Plc Process for production of internally bonded sewing threads
US5392588A (en) * 1982-06-07 1995-02-28 Burlington Industries, Inc. Spinning with hollow rotatable shaft and air flow
DE102009040054A1 (de) * 2009-09-03 2011-03-10 Niederrheinische Leinenweberei Carl Billmann GmbH & Co. KG Mineralfaden
CN102704074A (zh) * 2012-06-26 2012-10-03 东华大学 一种长丝螺旋展开的下托式复合纺纱机构、方法与应用
CN102704076A (zh) * 2012-06-26 2012-10-03 东华大学 长丝展开分劈后上下层再展的复合展丝器、方法及应用
CN102747489A (zh) * 2012-06-26 2012-10-24 东华大学 双张力盘阻尼差动二级分劈展纱器、纺纱方法及其应用
CN110055653A (zh) * 2019-05-16 2019-07-26 辽东学院 一种细加捻包覆绳的加工方法
EP3061856B1 (en) 2015-02-24 2024-07-03 Calik Denim Tekstil San. Ve Tic. A.S. Elastic composite yarn, textile fabric and method for manufacturing said elastic composite yarn

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US3739566A (en) * 1971-07-01 1973-06-19 P Smith Apparatus to produce yarn
FR2151500A5 (enrdf_load_stackoverflow) * 1971-08-31 1973-04-20 Saint Andre Filature
DE2645119C3 (de) * 1976-10-06 1979-06-07 Ofa Ag, Horn, Thurgau (Schweiz) Verfahren zur Herstellung eines Coregaras
JPS55103331A (en) * 1979-02-05 1980-08-07 Teijin Ltd High bulk spun yarn and method
US4350731A (en) * 1981-06-08 1982-09-21 Albany International Corp. Novel yarn and fabric formed therefrom
FR2515701B1 (fr) * 1981-11-02 1986-03-14 Pierre Payen Procede pour la fabrication de fil elasthane enrobe
BG39407A1 (en) * 1982-02-15 1986-06-16 Dimitrov Method and device for manufacture of yarn with core
US4928464A (en) * 1982-06-07 1990-05-29 Burlington Industries, Inc. Yarn produced by spinning with vacuum
DE4395220T1 (de) * 1992-10-14 1995-09-21 Wool Res Organisation Hochbauschungs-Mehrkomponentengarn
AU718617B2 (en) * 1996-01-15 2000-04-20 Donald Henry Hourahane Reinforcing for concrete products and reinforced concrete products
US6335087B1 (en) 1996-01-15 2002-01-01 Donald Henry Hourahane Reinforcing for concrete products and reinforced concrete products
GB201001367D0 (en) * 2010-01-28 2010-03-17 Coats Plc Sewing
JP5822289B2 (ja) * 2010-08-23 2015-11-24 倉敷紡績株式会社 詰め物体
DE102010051434B4 (de) * 2010-11-15 2015-09-24 Zwickauer Kammgarn Gmbh Vorrichtung und Verfahren zur Herstellung eines Umwindegarns
CN102704075B (zh) * 2012-06-26 2014-07-02 东华大学 长丝分束二轴系展丝器及应用
CN107043969B (zh) * 2017-05-11 2019-05-10 武汉纺织大学 一种型膜丝化的环锭复合纺纱方法
US10835708B2 (en) 2018-11-16 2020-11-17 Bearaby Inc. Layered yarn and weighted blanket for deep pressure therapy
US11946171B2 (en) * 2018-11-28 2024-04-02 Tvn Investment Limited Yarn, apparatus and methods preparing thereof
CA3127037A1 (en) 2019-01-30 2020-08-06 Tmc Limited Yarn, method and apparatus for producing yarn and products formed therefrom

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631666A (en) * 1970-01-15 1972-01-04 Hercules Inc Method of preparing blended yarns
JPS509428Y1 (enrdf_load_stackoverflow) * 1970-06-30 1975-03-22
US3955952A (en) * 1974-03-18 1976-05-11 Ppg Industries, Inc. Method of making a slubby strand
US4719744A (en) * 1982-06-07 1988-01-19 Burlington Industries, Inc. Vacuum spinning method
US5392588A (en) * 1982-06-07 1995-02-28 Burlington Industries, Inc. Spinning with hollow rotatable shaft and air flow
US4802330A (en) * 1987-01-20 1989-02-07 E. I. Du Pont De Nemours And Company Combined carpet yarns by open end rotor spinning
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CN102704074A (zh) * 2012-06-26 2012-10-03 东华大学 一种长丝螺旋展开的下托式复合纺纱机构、方法与应用
CN102704076A (zh) * 2012-06-26 2012-10-03 东华大学 长丝展开分劈后上下层再展的复合展丝器、方法及应用
CN102747489A (zh) * 2012-06-26 2012-10-24 东华大学 双张力盘阻尼差动二级分劈展纱器、纺纱方法及其应用
CN102704076B (zh) * 2012-06-26 2014-07-02 东华大学 长丝展开分劈后上下层再展的复合展丝器、方法及应用
CN102747489B (zh) * 2012-06-26 2014-10-15 东华大学 双张力盘阻尼差动二级分劈展纱器、纺纱方法及其应用
CN102704074B (zh) * 2012-06-26 2014-10-15 东华大学 一种长丝螺旋展开的下托式复合纺纱机构、方法与应用
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CN110055653A (zh) * 2019-05-16 2019-07-26 辽东学院 一种细加捻包覆绳的加工方法

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GB1224554A (en) 1971-03-10
GB1224553A (en) 1971-03-10
US3596459A (en) 1971-08-03
CH469109A (de) 1969-02-28
FR1564060A (enrdf_load_stackoverflow) 1969-04-18

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