GB581526A - Process for heat-treating and stretching untwisted yarn consisting of a polymer of acrylonitrile - Google Patents

Process for heat-treating and stretching untwisted yarn consisting of a polymer of acrylonitrile

Info

Publication number
GB581526A
GB581526A GB15917/44A GB1591744A GB581526A GB 581526 A GB581526 A GB 581526A GB 15917/44 A GB15917/44 A GB 15917/44A GB 1591744 A GB1591744 A GB 1591744A GB 581526 A GB581526 A GB 581526A
Authority
GB
United Kingdom
Prior art keywords
yarn
roll
filaments
acrylonitrile
heated
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
Application number
GB15917/44A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB581526A publication Critical patent/GB581526A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • D02J1/221—Preliminary treatments
    • 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
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)

Abstract

<PICT:0581526/IV/1> <PICT:0581526/IV/2> The tenacity of untwisted yarn consisting of a polymer of acrylonitrile is increased by spreading the filaments of the yarn into ribbon formation, passing the ribbon over a hot cylindrical surface whereby the filaments are rendered plastic, and stretching the yarn while the filaments thereof are spread out and in the plastic state. Referring to Fig. 1, untwisted polyacrylonitrile yarn is fed from thread advancing roller 2 and snubbing roller 1, through a yarn spreading device 3 on to heated roll 4. Rolls 1 and 4 have the same peripheral speed and the yarn is withdrawn from roll 4 at a speed greater than the peripheral speed of roll 4, whereby it is stretched. After cooling the yarn may be twisted. The yarn spreading device comprises two resilient thin sheets 3 exerting a mild pressure against each other and, if desired, a number of such devices may be used in series. Alternatively, the spreading device may comprise a series of rods over which the yarn is passed. A device which directs air jets against the yarn so as to separate the filaments may be employed, or an electric charge may be applied to the yarn to cause the filaments to balloon out. The cylinder 4 is heated by, for example, electrical means, high pressure steam, or hot vapours or liquids. In a modification, a supplementary heating element 11 (Fig. 5) is affixed around roll 4, the yarn thus being heated from two sides. The time of contact of the yarn with the roll 4 may be controlled by the diameter and speed of the roll; or by the angle of contact of the yarn on the roll. In addition to polyacrylonitrile, the filaments of the yarn may consist of copolymers and interpolymers of acrylonitrile such as the interpolymers of acrylonitrile with vinyl and acrylic compounds, e.g. vinyl acetate, vinyl chloride, acrylic acid and its esters and homologues, styrene and isobutylene. Dyes, pigments and dye modifiers may be added to the polymeric materials.
GB15917/44A 1943-08-20 1944-08-21 Process for heat-treating and stretching untwisted yarn consisting of a polymer of acrylonitrile Expired GB581526A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US499327A US2394540A (en) 1943-08-20 1943-08-20 Stretching of artificial yarn

Publications (1)

Publication Number Publication Date
GB581526A true GB581526A (en) 1946-10-16

Family

ID=23984838

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15917/44A Expired GB581526A (en) 1943-08-20 1944-08-21 Process for heat-treating and stretching untwisted yarn consisting of a polymer of acrylonitrile

Country Status (2)

Country Link
US (1) US2394540A (en)
GB (1) GB581526A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736944A (en) * 1953-09-02 1956-03-06 John Bright & Brothers Ltd Means for stretching cords, yarns and the like
DE1009075B (en) * 1953-09-23 1957-05-23 Bobkowicz E Method and device for producing yarn and thread from fiber material
US2921358A (en) * 1956-01-26 1960-01-19 Deering Milliken Res Corp Apparatus for producing elasticized thermoplastic yarns

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494649A (en) * 1944-07-24 1950-01-17 Celanese Corp Method of tire building and material used therein
US2611923A (en) * 1949-08-31 1952-09-30 Du Pont Method and apparatus for the drawing of synthetic funicular structures
US2677591A (en) * 1950-07-07 1954-05-04 Du Pont Removal of porosity in wet-spun acrylonitrile filaments by pressing against a hot surface
US2677590A (en) * 1950-07-07 1954-05-04 Du Pont Removal of porosity in wet-spun acrylonitrile filaments by treatment with heated fluids
US2869972A (en) * 1952-12-31 1959-01-20 Eastman Kodak Co Method of treating yarns and filaments and products produced thereby
US2799915A (en) * 1953-03-30 1957-07-23 Johns Manville Thermal modification of acrylonitrile polymers
US2913802A (en) * 1953-07-16 1959-11-24 Johns Manville Thermal modification of acrylonitrile yarns
US2821458A (en) * 1954-04-08 1958-01-28 Du Pont Process for producing uniform polyacrylonitrile fibers by heat relaxing solvent containing undrawn fibers, removing solvent and drawing the fibers
US3018157A (en) * 1954-10-28 1962-01-23 Du Pont Process of producing uniformly dyeing polyacrylonitrile filaments by heat stretching the water wetted filaments
NL102982C (en) * 1955-03-19
US3077004A (en) * 1956-03-23 1963-02-12 Du Pont Filament drawing
US2920176A (en) * 1957-10-28 1960-01-05 Chemstrand Corp Heating device
US3280241A (en) * 1960-12-06 1966-10-18 Scragg & Sons Drawn branched filament
US3336900A (en) * 1966-04-06 1967-08-22 Du Pont Filamentary yarn lubricating apparatus
US3825724A (en) * 1971-08-16 1974-07-23 Xerox Corp Wrap adjust device for controlling engagement between a web and roller
US4004330A (en) * 1972-01-03 1977-01-25 Techniservice Division Textured Yarn Co., Inc. Textile treatment apparatus
US4229404A (en) * 1978-04-28 1980-10-21 Phillips Petroleum Company Method for drawing yarn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736944A (en) * 1953-09-02 1956-03-06 John Bright & Brothers Ltd Means for stretching cords, yarns and the like
DE1009075B (en) * 1953-09-23 1957-05-23 Bobkowicz E Method and device for producing yarn and thread from fiber material
US2921358A (en) * 1956-01-26 1960-01-19 Deering Milliken Res Corp Apparatus for producing elasticized thermoplastic yarns

Also Published As

Publication number Publication date
US2394540A (en) 1946-02-12

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