US3303640A - Method of producing composite elastic yarn - Google Patents

Method of producing composite elastic yarn Download PDF

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Publication number
US3303640A
US3303640A US329670A US32967063A US3303640A US 3303640 A US3303640 A US 3303640A US 329670 A US329670 A US 329670A US 32967063 A US32967063 A US 32967063A US 3303640 A US3303640 A US 3303640A
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roping
staple
filament
yarn
elastic
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US329670A
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Reid Thomas
William D Macdonald
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Hale Manuf Co
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Hale Manuf Co
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Priority to US329670A priority Critical patent/US3303640A/en
Priority to US343721A priority patent/US3303604A/en
Priority to NO155893A priority patent/NO122232B/no
Priority to SE14922/64A priority patent/SE313269B/xx
Priority to NL6414396A priority patent/NL6414396A/xx
Priority to IL22601A priority patent/IL22601A/en
Priority to GB50598/64A priority patent/GB1055419A/en
Priority to DE19641510659 priority patent/DE1510659A1/en
Priority to LU47565D priority patent/LU47565A1/xx
Priority to BE656974D priority patent/BE656974A/xx
Priority to CH1603964A priority patent/CH435066A/en
Priority to US595729A priority patent/US3393505A/en
Application granted granted Critical
Publication of US3303640A publication Critical patent/US3303640A/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

  • the present invention relates to the production of composite yarn. More particularly, the present invention relates to a method of producing a new and useful composite textile yarn by wrapping an elastic continuous filament yarn with a relatively inelastic spun yarn.
  • the core yarn can be formed from a plurality of continuous filaments or staple fibers.
  • the core is made of continuous filaments.
  • the continuous filaments in the core are highly elastic such as rubber and spandex filaments.
  • a spinning frame including a plurality of pairs of drafting rolls and a twister take-up device is used. In such operation, an assemblage of fibers drawn into a single strand is further drawn between the drafting rolls.
  • the core yarn usually is introduced to the nip of the last set of rolls with the core yarn and the drafted strand being twisted together as they proceed together to the take-up device.
  • a spandex yarn tensioned to be in a relatively highly stretched state is wrapped with a drawn roving. The fibers in the roving are well distributed, even and parallel.
  • Composite yarns produced by wrapping a drawn roving about a core of continuous filaments have not been entirely satisfactory in that the staple fiber wrapping lacks good bulk and does not cover the core satisfactorily. Furthermore, where a highly tensioned elastic yarn is used as a core, it is diflicult to maintain a uniformly stretched condition therein, without which unevenness of the covering of the elastic yarn by the wrapping yarn results.
  • An object of the present invention is to provide a novel composite yarn.
  • Another object of the present invention is to provide a new system for producing a composite yarn having a core and a wrapping. Other objects will be apparent.
  • the core of the composite yarn of the present invention is composed of at least one elastic continuous filament made of rubber, spandex or like material having a high degree of elasticity. Wrapped about the core is at least one inelastic staple fiber roping. The fibers in the staple roping have a low order of parallelism and cross one another in a rather haphazard arrangement.
  • the continuous filament core is made of spandex and the staple roping is made of synthetic fibers, most preferably nylon, polyester, or acrylic fibers.
  • the method generally speaking, involves wrapping at least one staple fiber roping about at least one elastic continuous filament in a particular manner.
  • a source of an elastic continuous filament and a source of an inelastic staple fiber roping having little fiber parallelism are provided.
  • the elastic filament and the staple fiber roping are forwarded longitudinally from their respective sources and moved together in contacting relation to a zone wherein the staple fiber roping is drafted a rather low, but critical amount of about l.l02.0 and wherein the continuous elastic filament is elongated a corresponding amount.
  • FIG. 1 denotes a bobbin on which an elastic continuous filament 2 is wrapped which can be in monofilament, multi-filament, or fused multifilament forms.
  • the elastic filament is withdrawn, passed over guide 3 and through a tension device 4.
  • a minimum tension is employed just sufiicient to provide uniform delivery of the filament and prevent overfeeding; and best results are obtained by minimizing the elongation of the elastic filament delivered to the draft zone A.
  • a roping spool 5 is provided on which a suitable staple fiber roping 6 is wrapped. Quite often it is desirable to use two or more ropings for each end of elastic filament where greater bulk is required.
  • the roping 6 is unwound from the spool and forwarded together with filament 2 to zone A by spinning drum 7. Roping 6 and filament 2 enter the zone through back rolls 8 wherein a drafting force is app-lied to the resulting composite strands 9 by front rolls 10.
  • the yarn forwarding speeds of rolls 8 and rolls 10 are such as to provide a draft of about 1.10-2.00, preferably 1304.85.
  • a false twister 11 is positioned in the path of the strands.
  • a ring twister take-up of the type illustrated in the drawing A bobbin 12 is rotated by a driven belt 13 to wrap the resulting composite yarn thereon.
  • a conventional vertically reciprocating spinning ring 14 carrying a ring traveller 15 adapted to revolve freely about the bobbin is employed.
  • elastic filament is used to mean a manufactured filament from natural or synthetic rubber, as well as from spandex.
  • spandex filament in its generic sense means a manufactured filament in which the fiberforming substance is a long chain synthetic elastomer comprised at least of segmented polyurethane or the like.
  • Suitable inelastic textile fibers in staple form employed in the roping include the natural fibers of cotton and wool and the man-made fibers of rayon, cellulose acetate, nylon, acrylic fibers, polyesters, etc.
  • the staple fiber yarn be a nylon such as nylon 66 and nylon 6, a polyester such as polyethylene terephthlate, or an acrylic fiber such as those acrylic fibers produced from polymers of 85% and more acrylonitrile.
  • Example I A roping of nylon 66 cri-mped staple fiber was prepared using a conventional card preparatory to spinning on the woolen system. The roping was wound on a spool and had a total weight of 183 grains per 50 yards. The fibers had an average denier of 3.0 and an average length of about 2.5 inches. The roping was unrolled from the spool and moved together with a spandex filament of 420 denier to the black rolls on a woolen spinning frame driven at a speed of 102 r.p.m. The front rolls on the frame were operated at an increased speed to exert a draft of 1.80. A false twister between the two pairs of rolls imparted a false twist of turn per inch to the strands. After leaving the front rolls, the strands were packaged using a ring twister take-up to impart a twist of 6 turns per inch.
  • Example II A roping of crimped acrylic fibers prepared from an acrylonitrile polymer of 94% acrylonitrile and 6% vinyl acetate is prepared on a card as in Example I above.
  • the roping has a total weight of 165 grains per 50 yards and the fibers thereof an average denier of 3.0 and a staple length of about 2.5 inches.
  • the roping is combined with a 420 denier spandex fiilament and forwarded to a woolen spinning frame.
  • the back rolls of the spinning frame are driven at 102 r.p.m. and the front rolls at such increased speed as to exert 'a draft of 1.60.
  • a false twister between the pairs of rolls imparts a false twist of .8 turn per inch.
  • the strands are packaged by a ring twister take-up which imparts a twist of 5.5 turns per inch.
  • the resulting core yarn has a uniform appearance with even covering of the core by the wrapping of staple fibers as well as excellent bulk.
  • the process for the prepartion of core yarns illus trated above possesses the distinct advantage of ability to control the degree of cover and wrap of a given core, or different size cores by varying the size of the roping or ropings used.
  • Excellent bobbin-to-bobbin uniformity is achieved because of uniform draft of the combined strands across any number of spindles and successive bobbins.
  • the yarns of the present invention are particularly useful in the construction of stretch-type garments including bathing suits and other action sportswear, as well as slip covers and thelike.
  • the process is easy to control and can be carried out using a woolen spinning frame without extensive modification thereof.
  • Other advantages of the invention may be noted.
  • step (f) The process of claim 1 wherein a true twist of 5-7 turns per inch is used in step (f).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Ship Loading And Unloading (AREA)
  • Auxiliary Methods And Devices For Loading And Unloading (AREA)

Description

Feb. 14 1967 ETAL 3,303,640
METHOD OF PRODUCING COMPOSITE ELASTIC YARN Filed D60. 11, 1965 INVENTORS Thomas Reid & Wlz'am/ aM floluzld Mm 0 M mgm ATTORNEYS United States Patent 3,303,640 METHOD OF PRODUCING COMPOSITE ELASTIC YARN Thomas Reid, Danielson, and William D. MacDonald,
South Woodstock, Conn., assignors to The Hale Manufacturing Company, Putnam, Conn., a corporation of Delaware Filed Dec. 11, 1963, Ser. No. 329,670 8 Claims. (Cl. 57163) The present invention relates to the production of composite yarn. More particularly, the present invention relates to a method of producing a new and useful composite textile yarn by wrapping an elastic continuous filament yarn with a relatively inelastic spun yarn.
It is well known to produce composite yarn having a core yarn wrapped with a different yarn. The core yarn can be formed from a plurality of continuous filaments or staple fibers. When strength is desired in the composite yarn, the core is made of continuous filaments. When both strength and stretchability are desired properties, the continuous filaments in the core are highly elastic such as rubber and spandex filaments. Ordinarily, a spinning frame including a plurality of pairs of drafting rolls and a twister take-up device is used. In such operation, an assemblage of fibers drawn into a single strand is further drawn between the drafting rolls. The core yarn usually is introduced to the nip of the last set of rolls with the core yarn and the drafted strand being twisted together as they proceed together to the take-up device. In one known method of spinning composite yarn a spandex yarn tensioned to be in a relatively highly stretched state is wrapped with a drawn roving. The fibers in the roving are well distributed, even and parallel.
Composite yarns produced by wrapping a drawn roving about a core of continuous filaments have not been entirely satisfactory in that the staple fiber wrapping lacks good bulk and does not cover the core satisfactorily. Furthermore, where a highly tensioned elastic yarn is used as a core, it is diflicult to maintain a uniformly stretched condition therein, without which unevenness of the covering of the elastic yarn by the wrapping yarn results.
An object of the present invention is to provide a novel composite yarn.
' Another object of the present invention is to provide a new system for producing a composite yarn having a core and a wrapping. Other objects will be apparent.
The core of the composite yarn of the present invention is composed of at least one elastic continuous filament made of rubber, spandex or like material having a high degree of elasticity. Wrapped about the core is at least one inelastic staple fiber roping. The fibers in the staple roping have a low order of parallelism and cross one another in a rather haphazard arrangement. In a preferred embodiment the continuous filament core is made of spandex and the staple roping is made of synthetic fibers, most preferably nylon, polyester, or acrylic fibers.
The method, generally speaking, involves wrapping at least one staple fiber roping about at least one elastic continuous filament in a particular manner. A source of an elastic continuous filament and a source of an inelastic staple fiber roping having little fiber parallelism are provided. One can use satisfactorily one 'or more staple fiber ropings as produced by a card, preparatory to spinning in accordance with the woolen system. The elastic filament and the staple fiber roping are forwarded longitudinally from their respective sources and moved together in contacting relation to a zone wherein the staple fiber roping is drafted a rather low, but critical amount of about l.l02.0 and wherein the continuous elastic filament is elongated a corresponding amount. Also, in the zone a false twist is applied to the staple roping and elastic 3,303,640 Patented Feb. 14, 1967 ice filament. After leaving the zone, a true twist of about 4 to 8 turns per inch is imparted to the roping and filament. Finally, the resulting composite yarn structure is taken up in an orderly manner.
The invention can further be understood by reference to the accompanying drawing which is a schematic diagram of one form of apparatus useful for performing the process herein described.
With reference to the drawing numeral 1 denotes a bobbin on which an elastic continuous filament 2 is wrapped which can be in monofilament, multi-filament, or fused multifilament forms. The elastic filament is withdrawn, passed over guide 3 and through a tension device 4. A minimum tension is employed just sufiicient to provide uniform delivery of the filament and prevent overfeeding; and best results are obtained by minimizing the elongation of the elastic filament delivered to the draft zone A.
A roping spool 5 is provided on which a suitable staple fiber roping 6 is wrapped. Quite often it is desirable to use two or more ropings for each end of elastic filament where greater bulk is required. The roping 6 is unwound from the spool and forwarded together with filament 2 to zone A by spinning drum 7. Roping 6 and filament 2 enter the zone through back rolls 8 wherein a drafting force is app-lied to the resulting composite strands 9 by front rolls 10. The yarn forwarding speeds of rolls 8 and rolls 10 are such as to provide a draft of about 1.10-2.00, preferably 1304.85. A false twister 11 is positioned in the path of the strands. This is employed to impart a false twist of about /2 to 1 turn per inch at the same time that drafting is accomplished. After leaving zone A, a true twist of about 48 turns per inch is imparted to the yarn. As a convenient way of doing this, one can employ a ring twister take-up of the type illustrated in the drawing. A bobbin 12 is rotated by a driven belt 13 to wrap the resulting composite yarn thereon. A conventional vertically reciprocating spinning ring 14 carrying a ring traveller 15 adapted to revolve freely about the bobbin is employed.
The term elastic filament is used to mean a manufactured filament from natural or synthetic rubber, as well as from spandex. The term spandex filament in its generic sense means a manufactured filament in which the fiberforming substance is a long chain synthetic elastomer comprised at least of segmented polyurethane or the like. Suitable inelastic textile fibers in staple form employed in the roping include the natural fibers of cotton and wool and the man-made fibers of rayon, cellulose acetate, nylon, acrylic fibers, polyesters, etc. However, it is preferred that the staple fiber yarn be a nylon such as nylon 66 and nylon 6, a polyester such as polyethylene terephthlate, or an acrylic fiber such as those acrylic fibers produced from polymers of 85% and more acrylonitrile.
The following examples are given to illustrate this invention further.
Example I A roping of nylon 66 cri-mped staple fiber was prepared using a conventional card preparatory to spinning on the woolen system. The roping was wound on a spool and had a total weight of 183 grains per 50 yards. The fibers had an average denier of 3.0 and an average length of about 2.5 inches. The roping was unrolled from the spool and moved together with a spandex filament of 420 denier to the black rolls on a woolen spinning frame driven at a speed of 102 r.p.m. The front rolls on the frame were operated at an increased speed to exert a draft of 1.80. A false twister between the two pairs of rolls imparted a false twist of turn per inch to the strands. After leaving the front rolls, the strands were packaged using a ring twister take-up to impart a twist of 6 turns per inch.
Example II A roping of crimped acrylic fibers prepared from an acrylonitrile polymer of 94% acrylonitrile and 6% vinyl acetate is prepared on a card as in Example I above. The roping has a total weight of 165 grains per 50 yards and the fibers thereof an average denier of 3.0 and a staple length of about 2.5 inches. In the same manner as in the above example the roping is combined with a 420 denier spandex fiilament and forwarded to a woolen spinning frame. The back rolls of the spinning frame are driven at 102 r.p.m. and the front rolls at such increased speed as to exert 'a draft of 1.60. A false twister between the pairs of rolls imparts a false twist of .8 turn per inch. After leaving the front rolls, the strands are packaged by a ring twister take-up which imparts a twist of 5.5 turns per inch. The resulting core yarn has a uniform appearance with even covering of the core by the wrapping of staple fibers as well as excellent bulk.
The process for the prepartion of core yarns illus trated above possesses the distinct advantage of ability to control the degree of cover and wrap of a given core, or different size cores by varying the size of the roping or ropings used. Excellent bobbin-to-bobbin uniformity is achieved because of uniform draft of the combined strands across any number of spindles and successive bobbins.
The yarns of the present invention are particularly useful in the construction of stretch-type garments including bathing suits and other action sportswear, as well as slip covers and thelike. The process is easy to control and can be carried out using a woolen spinning frame without extensive modification thereof. Other advantages of the invention may be noted.
It is not intended that the invention be limited solely to the details above. It will be recognized that numerous modifications conforming to the spirit of the invention may :be made. Therefore, it is intended that the invention be limited only by the scope of the following claims.
What is claimed is:
1. A method of producing a composite yarn'comprising:
(a) providing a source of an elastic filament and a 4 source of staple inelastic fiber roping having a low order of parallelism and individual fibers of which cross in a haphazard arrangement;
(b) forwarding the elastic filament and the staple roping from their respective sources;
(c) moving the elastic filament and the staple roping together in contacting relation to a drafting zone;
(d) in said zone drafting the staple fiber roping in the range of 1.10 to 2.00 and elongating the elastic filament a corresponding amount;
(e) imparting a false twist to the staple roping and the filament in the drafting zone;
(f) thereafter twisting the staple roping and the filament together with a true twist of about 4 to 8 turns per inch; and
(g) collecting the resulting composite yarn in an orderly manner.
2. The process of claim 1 wherein the steps of twisting and collecting are accomplished using a ring twister take-up.
3. The process of claim 1 wherein the draft range is 1.30 to 1.85.
- 4. The process of claim 1 wherein a true twist of 5-7 turns per inch is used in step (f).
5. The process of claim 1 wherein the staple fiber roping is made of nylon 66.
6. The process of claim 1 wherein the staple fiber roping is made of nylon 6.
7. The process of claim 1 wherein the staple fiber roping is made of a fiber-forming polyester.
8. The process of claim 1 wherein the staple fiber roping is made of a fiber-forming acrylic polymer.
References Cited by the Examiner UNITED STATES PATENTS 647,138 4/ 1900 Holmes et al. 5751;4 I 1,254,738 1/1918 Stevens et a1 5712 X 2,076,270 4/1937 Harris 57-163 2,076,271 4/1937 Harris 57163 X p 2,210,884 8/1940 Chittenden et a1 57163' 3,009,311 11/1961 Wang 57-152 3,038,295 6/ 1962 Humphreys 57152 3,127,731 4/1964 McKinnon 57152 MERVIN STEIN, Primary Examiner.

Claims (1)

1. A METHOD OF PRODUCING A COMPOSITE YARN COMPRISING: (A) PROVIDING A SOURCE OF AN ELASTIC FILAMENT AND A SOURCE OF STAPLE INELASTIC FIBER ROPING HAVING A LOW ORDER OF PARALLELISM AND INDIVIDUAL FIBERS OF WHICH CROSS IN A HAPHAZARD ARRANGEMENT; (B) FORWARDING THE ELASTIC FILAMENT AND THE STAPLE ROPING FROM THEIR RESPECTIVE SOURCES; (C) MOVING THE ELASTIC FILAMENT AND THE STAPLE ROPING TOGETHER IN CONTACTING RELATION TO A DRAFTING ZONE;
US329670A 1963-12-11 1963-12-11 Method of producing composite elastic yarn Expired - Lifetime US3303640A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US329670A US3303640A (en) 1963-12-11 1963-12-11 Method of producing composite elastic yarn
US343721A US3303604A (en) 1963-12-11 1964-02-10 Building toy
NO155893A NO122232B (en) 1963-12-11 1964-12-09
NL6414396A NL6414396A (en) 1963-12-11 1964-12-10
IL22601A IL22601A (en) 1963-12-11 1964-12-10 Composite eleastic yarn and method for producing the same
SE14922/64A SE313269B (en) 1963-12-11 1964-12-10
GB50598/64A GB1055419A (en) 1963-12-11 1964-12-11 Composite elastic yarn and method for producing the same
DE19641510659 DE1510659A1 (en) 1963-12-11 1964-12-11 Composite yarn and method of making it
LU47565D LU47565A1 (en) 1963-12-11 1964-12-11
BE656974D BE656974A (en) 1963-12-11 1964-12-11
CH1603964A CH435066A (en) 1963-12-11 1964-12-11 Composite elastic yarn and process for its manufacture
US595729A US3393505A (en) 1963-12-11 1966-11-21 Composite elastic yarn

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US3303640A true US3303640A (en) 1967-02-14

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BE (1) BE656974A (en)
CH (1) CH435066A (en)
DE (1) DE1510659A1 (en)
GB (1) GB1055419A (en)
IL (1) IL22601A (en)
LU (1) LU47565A1 (en)
NO (1) NO122232B (en)
SE (1) SE313269B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420049A (en) * 1965-01-05 1969-01-07 Heberlein Patent Corp Process for making combination yarn and product
US3445994A (en) * 1966-06-17 1969-05-27 Chavanoz Moulinage Retorderie Process for the manufacture of a looped yarn and apparatus therefor
US3500629A (en) * 1966-12-06 1970-03-17 Burlington Industries Inc Process for producing a stretch core spun yarn
US3540204A (en) * 1967-04-18 1970-11-17 Toray Industries Method for manufacturing an improved elastic yarn covered with multifilament
US3952496A (en) * 1969-02-19 1976-04-27 Akzona Incorporated Composite thread
US4226076A (en) * 1978-12-04 1980-10-07 Akzona Incorporated Apparatus and process for producing a covered elastic composite yarn
EP0054652A1 (en) * 1980-12-19 1982-06-30 Krall & Roth, Weberei GmbH & Co. KG Device for manufacturing an elastic plied yarn
US4554121A (en) * 1980-08-18 1985-11-19 Akzona Incorporated Method of forming latent-contractable elastomeric composite yarns
CN105442128A (en) * 2015-12-15 2016-03-30 桐乡市濮院羊毛衫职业技术学校 Semi-worsted knitted sweater

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5698321A (en) * 1996-07-08 1997-12-16 Selivansky; Dror Acrlic-covered spandex yarn
CN103437037A (en) * 2013-09-05 2013-12-11 苏州巨旺纺织有限公司 Insulated polyamide fiber fabric

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US647138A (en) * 1898-12-28 1900-04-10 Theodore Holmes Machinery for spinning, drawing, doubling, and twisting textile yarns.
US1254738A (en) * 1916-10-19 1918-01-29 Esmond Mills Spinning-frame.
US2076270A (en) * 1935-08-15 1937-04-06 Harris Textile Machinery Corp Method of making covered elastic threads
US2076271A (en) * 1935-09-12 1937-04-06 Harris Textile Machinery Corp Covered elastic thread
US2210884A (en) * 1939-02-11 1940-08-13 Us Rubber Co Method of making elastic yarn
US3009311A (en) * 1957-03-13 1961-11-21 Us Rubber Co Elastic yarn
US3038295A (en) * 1958-12-24 1962-06-12 Du Pont Elastic high-bulk yarn
US3127731A (en) * 1962-09-06 1964-04-07 Us Rubber Co Plastic core yarn

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US647138A (en) * 1898-12-28 1900-04-10 Theodore Holmes Machinery for spinning, drawing, doubling, and twisting textile yarns.
US1254738A (en) * 1916-10-19 1918-01-29 Esmond Mills Spinning-frame.
US2076270A (en) * 1935-08-15 1937-04-06 Harris Textile Machinery Corp Method of making covered elastic threads
US2076271A (en) * 1935-09-12 1937-04-06 Harris Textile Machinery Corp Covered elastic thread
US2210884A (en) * 1939-02-11 1940-08-13 Us Rubber Co Method of making elastic yarn
US3009311A (en) * 1957-03-13 1961-11-21 Us Rubber Co Elastic yarn
US3038295A (en) * 1958-12-24 1962-06-12 Du Pont Elastic high-bulk yarn
US3127731A (en) * 1962-09-06 1964-04-07 Us Rubber Co Plastic core yarn

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420049A (en) * 1965-01-05 1969-01-07 Heberlein Patent Corp Process for making combination yarn and product
US3445994A (en) * 1966-06-17 1969-05-27 Chavanoz Moulinage Retorderie Process for the manufacture of a looped yarn and apparatus therefor
US3500629A (en) * 1966-12-06 1970-03-17 Burlington Industries Inc Process for producing a stretch core spun yarn
US3540204A (en) * 1967-04-18 1970-11-17 Toray Industries Method for manufacturing an improved elastic yarn covered with multifilament
US3952496A (en) * 1969-02-19 1976-04-27 Akzona Incorporated Composite thread
US4226076A (en) * 1978-12-04 1980-10-07 Akzona Incorporated Apparatus and process for producing a covered elastic composite yarn
US4554121A (en) * 1980-08-18 1985-11-19 Akzona Incorporated Method of forming latent-contractable elastomeric composite yarns
EP0054652A1 (en) * 1980-12-19 1982-06-30 Krall & Roth, Weberei GmbH & Co. KG Device for manufacturing an elastic plied yarn
CN105442128A (en) * 2015-12-15 2016-03-30 桐乡市濮院羊毛衫职业技术学校 Semi-worsted knitted sweater

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Publication number Publication date
SE313269B (en) 1969-08-04
IL22601A (en) 1968-07-25
DE1510659A1 (en) 1970-02-05
NO122232B (en) 1971-06-01
BE656974A (en) 1965-06-11
GB1055419A (en) 1967-01-18
CH435066A (en) 1967-04-30
LU47565A1 (en) 1965-06-11

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