US3001236A - Hot stretching of polyacrylonitrile yarns with draw point located on feed roller - Google Patents

Hot stretching of polyacrylonitrile yarns with draw point located on feed roller Download PDF

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Publication number
US3001236A
US3001236A US748966A US74896658A US3001236A US 3001236 A US3001236 A US 3001236A US 748966 A US748966 A US 748966A US 74896658 A US74896658 A US 74896658A US 3001236 A US3001236 A US 3001236A
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US
United States
Prior art keywords
yarn
roller
polyacrylonitrile
yarns
stretching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US748966A
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English (en)
Inventor
Maier Walter
Bernklau Kurt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Application granted granted Critical
Publication of US3001236A publication Critical patent/US3001236A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/224—Selection or control of the temperature during stretching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching

Definitions

  • This invention relates to the stretching of polyacrylonitrile yarns, and more particularly an improved process of stretching such yarns.
  • yarns or films consisting of polyacrylonitrile or of copolymers with a minimum content of about 85% of polyacrylonitrile can be stretched to about 4-10 times their length by heating them to a temperature of at least 100 0., preferably 130-180 C. and stretching them in this condition.
  • the stretching process is generally carried out by either sliding the yarn continuously over a heated surface or by running the yarn in one to several convolutions around a heated roller, whereupon the yarn heated in this Way is drawn off by one or more rollers at greater peripheral speeds.
  • a further object is an improved process of stretching polyacrylonitrile yarn which produces a stretched product of even thickness along the entire length of the yarn and of all capillary filaments in the yarn.
  • a further object is the provision of a stretching apparatus which will avoid the disadvantages of the conventional stretching machines.
  • the objects are accomplished by heating the yarn or the like on a rotating roller which is brought to a temperature of 100-200 C., preferably 130-180 C. and stretching the yarn before being drawn off the said roller, so that the point of stretch formed is located on the roller itself and can change its position thereon, by guiding the stretched yarn over a slightly curved frame.
  • a rotating roller which is brought to a temperature of 100-200 C., preferably 130-180 C. and stretching the yarn before being drawn off the said roller, so that the point of stretch formed is located on the roller itself and can change its position thereon, by guiding the stretched yarn over a slightly curved frame.
  • a slightly curved frame which is atent 3,001,236 Patented Sept. 26, 1961 heated to a temperature which differs by no more than 50 C. from the temperature of the rollers.
  • a polyacrylonitrile yarn 1 prepared by extrusion of a solution of the polymer in dimethyl formamide into an evaporative medium, whereby the dimethyl formamide is removed and a yarn containing only a small amount of solvent is formed, is led from a suitable source of supply, such as a yarn package, on to a heated roller 2 with the roller pin 3 and wound around this roller for several times. After leaving this roller, the yarn travels over the frame 4 which is also heated and which can be pivotally arranged. The yarn, upon leaving the frame 4, passes over an idler roll 5 and then without slippage about a second positively driven roller 6 which rotates at a speed of about 4-10 times the peripheral speed of the heated roller 2. Cooperating with said roller 6 is a displacement guide. The stretched yarn is then collected on a rotating bobbin 7.
  • the heated roller Immediately after the stretched yarn has been drawn ofi the heated roller, it travels on to the slightly curved frame 4 having a length of 7 inches and heated to 165 C., whereupon it is drawn off by means of the roller 6 with a speed of 600 ft./min.
  • the yarn has a high degree of uniformity as regards its count, and has a uniform dyeing capacity when worked up into fabrics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US748966A 1957-07-26 1958-07-16 Hot stretching of polyacrylonitrile yarns with draw point located on feed roller Expired - Lifetime US3001236A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP1268A DE1268778B (de) 1957-07-26 1957-07-26 Verfahren zum Heissverstrecken von Faeden

Publications (1)

Publication Number Publication Date
US3001236A true US3001236A (en) 1961-09-26

Family

ID=5660100

Family Applications (1)

Application Number Title Priority Date Filing Date
US748966A Expired - Lifetime US3001236A (en) 1957-07-26 1958-07-16 Hot stretching of polyacrylonitrile yarns with draw point located on feed roller

Country Status (5)

Country Link
US (1) US3001236A (cs)
BE (1) BE569623A (cs)
DE (1) DE1268778B (cs)
FR (1) FR1200548A (cs)
GB (1) GB836340A (cs)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090077A (en) * 1959-03-13 1963-05-21 Canadian Ind Drawing of synthetic polymers
US3099872A (en) * 1959-07-04 1963-08-06 Glanzstoff Ag Method and apparatus for heating and drawing threads
US3103407A (en) * 1959-11-25 1963-09-10 Process of drawing melt spun polyester yarns
US3251920A (en) * 1962-05-14 1966-05-17 Gen Motors Corp Method of forming thermoplastic articles
US3303169A (en) * 1962-01-18 1967-02-07 Du Pont High-modulus, high-tenacity, lowshrinkage polyamide yarn
EP2647745A1 (en) * 2010-11-30 2013-10-09 Toray Industries, Inc. Polyacrylonitrile fiber manufacturing method and carbon fiber manufacturing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR910010214B1 (ko) * 1985-02-06 1991-12-21 미쯔비시 덴끼 가부시기가이샤 세탁기의 탈수운전방법

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
US2611923A (en) * 1949-08-31 1952-09-30 Du Pont Method and apparatus for the drawing of synthetic funicular structures
US2768057A (en) * 1950-02-08 1956-10-23 Phrix Werke Ag Drawing of organic high polymers
US2811409A (en) * 1952-12-31 1957-10-29 Eastman Kodak Co Spinning of acrylonitrile polymer fibers
US2859472A (en) * 1955-10-05 1958-11-11 Allied Chem Apparatus for reducing shrinkage and creep of thermoplastic yarns
US2871458A (en) * 1955-09-27 1959-01-27 Jr Richard A Rybold Plug and receptacle assembly

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL153050B (nl) * 1949-04-27 Nederlanden Staat Tweepool voor het nabootsen van de karakteristieke impedantie van een gepupiniseerd kabeladerpaar.
CH303233A (de) * 1951-03-19 1954-11-30 Phrix Werke Ag Verfahren zum Verstrecken von Fäden aus Polyacrylnitril, seinen Copolymeren oder Mischpolymerisaten.
CH300304A (de) * 1951-06-11 1954-07-31 Phrix Werke Ag Verfahren zum Herstellen von Polyacrylnitril-Fäden.
LU31990A1 (cs) * 1952-02-02

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
US2611923A (en) * 1949-08-31 1952-09-30 Du Pont Method and apparatus for the drawing of synthetic funicular structures
US2768057A (en) * 1950-02-08 1956-10-23 Phrix Werke Ag Drawing of organic high polymers
US2811409A (en) * 1952-12-31 1957-10-29 Eastman Kodak Co Spinning of acrylonitrile polymer fibers
US2871458A (en) * 1955-09-27 1959-01-27 Jr Richard A Rybold Plug and receptacle assembly
US2859472A (en) * 1955-10-05 1958-11-11 Allied Chem Apparatus for reducing shrinkage and creep of thermoplastic yarns

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090077A (en) * 1959-03-13 1963-05-21 Canadian Ind Drawing of synthetic polymers
US3099872A (en) * 1959-07-04 1963-08-06 Glanzstoff Ag Method and apparatus for heating and drawing threads
US3103407A (en) * 1959-11-25 1963-09-10 Process of drawing melt spun polyester yarns
US3303169A (en) * 1962-01-18 1967-02-07 Du Pont High-modulus, high-tenacity, lowshrinkage polyamide yarn
US3251920A (en) * 1962-05-14 1966-05-17 Gen Motors Corp Method of forming thermoplastic articles
EP2647745A1 (en) * 2010-11-30 2013-10-09 Toray Industries, Inc. Polyacrylonitrile fiber manufacturing method and carbon fiber manufacturing method
EP2647745A4 (en) * 2010-11-30 2014-06-11 Toray Industries METHOD FOR MANUFACTURING POLYACRYLONITRILE FIBERS AND METHOD FOR MANUFACTURING CARBON FIBERS
US8845938B2 (en) 2010-11-30 2014-09-30 Toray Industries, Inc. Polyacrylonitrile fiber manufacturing method and carbon fiber manufacturing method

Also Published As

Publication number Publication date
DE1268778B (de) 1968-05-22
BE569623A (cs)
GB836340A (en) 1960-06-01
FR1200548A (fr) 1959-12-22

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