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 acrylonitrileInfo
- 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
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.
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)
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)
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 |
-
1943
- 1943-08-20 US US499327A patent/US2394540A/en not_active Expired - Lifetime
-
1944
- 1944-08-21 GB GB15917/44A patent/GB581526A/en not_active Expired
Cited By (3)
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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