GB944424A - Improvements relating to crimped composite filaments of synthetic polymers - Google Patents
Improvements relating to crimped composite filaments of synthetic polymersInfo
- Publication number
- GB944424A GB944424A GB5319/60A GB531960A GB944424A GB 944424 A GB944424 A GB 944424A GB 5319/60 A GB5319/60 A GB 5319/60A GB 531960 A GB531960 A GB 531960A GB 944424 A GB944424 A GB 944424A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- component
- crimps
- polymers
- crimp
- 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
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/04—Dry spinning methods
-
- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/08—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyacrylonitrile as constituent
-
- 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
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/217—Spinnerette forming conjugate, composite or hollow filaments
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2973—Particular cross section
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Multicomponent Fibers (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
944,424. Crimped composite artificial filaments. E. I. DU PONT DE NEMOURS & CO. Feb. 15, 1960 [Feb. 16, 1959], No. 5319/60. Heading B5B. Dry spun composite filaments comprising at least two linear fibre-forming synthetic polymers of differing shrinkage potentials so distributed in the filaments that each filament has at all points along its length two or more distinct components comprising respectively the said different polymers arranged contiguously and bonded together in a side-by-side structure in which the outer surface of each component forms part of the surface of the composite filament, having 10 to 18 helical crimps per inch of extended length and an equilibrium crimp reversibility of 25 to 50% may be produced by dry spinning solutions of the component polymers simultaneously through separate but contiguous sectors of single orifices under conditions of high gas and cell temperatures, high gas flow rate and low spinning speed such that the residual solvent content of the as-spun composite fibre is less than the amount indicated by curve 1 of Fig. 8 of the drawings. The points of extrusion of the spinning solutions are preferably positioned so that the component of lower shrinkage potential faces the centre of the spinning cell and that of higher shrinkage potential faces the periphery of the cell. Preferably, also the spinning solution of the component of lower shrinkage potential is less concentrated than that of the other component. The component of " lower shrinkage potential " is that which, if in the form of a homogeneous filament, would shrink less under the action of hot water. In Fig. 8 curve 1 shows the maximum permissible residual solvent content and curve 2 shows the preferred residual solvent content, both as a function of filament denier. The equilibrium crimp reversibility is determined as follows: A single filament is separated from a tow of drawn, unrelaxed filaments and a three-inch length of the filament is attached to opposite sides of a rectangular wire frame with 30% slack between the ends. The frame and filament are then immersed in boiling water for 15 minutes to develop the crimp. The crimped filament is then transferred to a viewing holder so that about 10% slack is present and the filament length between the clamped ends is about 2.5 inches. The filament is dried by storing it and the holder for 18 to 24 hours at 70 C. in a stoppered test tube containing a desiccant and the tube is allowed to cool to 25 C. and the total number of crimps in the filament between the fixed ends is counted. The filament and holder are then stored in water at 70 C. for 6 hours and the number of crimps in the wet filament counted as above. The cycle is repeated as often as may be required to obtain reproducible results. The equilibrium crimp reversibility (ECR) or relative change in the number of crimps per inch of extended length from 25 C. dry to 70 C. wet may be calculated from the formula ECR= (No. of crimps dry-No. of crimps wet) x 100 No. of crimps dry " Extended length " is defined as the length of a filament when measured under sufficient tension to pull out the crimp and give a straight filament. All crimp counts are stated in terms of extended length. Each of the component polymers may be an acrylonitrile polymer. At least one of the component polymers may contain ionizable groups, such as sulphonic acid groups or sulphonic acid salt groups. A polymer containing ionizable groups may also contain 1-15% by weight of structural units derived from a non-ionic modifier such as methyl acrylate, methyl methacrylate, methyl vinyl ketone, acrylamide, N-t-butylacrylamide, vinyl methoxyethyl ether, methoxyethyl acrylate or vinyl acetate. One component polymer may be polyacrylonitrile and the other may be a copolymer of acrylonitrile and p-styrene sulphonic acid or a salt thereof. The different acrylonitrile polymers may be dissolved in dimethyl formamide.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US793502A US2988420A (en) | 1959-02-16 | 1959-02-16 | Process for spinning polyacrylonitrile filament having low degree of crimp and high cimp reversibility |
Publications (1)
Publication Number | Publication Date |
---|---|
GB944424A true GB944424A (en) | 1963-12-11 |
Family
ID=25160057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5319/60A Expired GB944424A (en) | 1959-02-16 | 1960-02-15 | Improvements relating to crimped composite filaments of synthetic polymers |
Country Status (7)
Country | Link |
---|---|
US (1) | US2988420A (en) |
BE (1) | BE587165A (en) |
CH (1) | CH419434A (en) |
DE (1) | DE1435610A1 (en) |
FR (1) | FR1248593A (en) |
GB (1) | GB944424A (en) |
SE (1) | SE300282B (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL284970A (en) * | 1961-11-02 | |||
US3330896A (en) * | 1962-07-12 | 1967-07-11 | American Cyanamid Co | Method of producing bulky yarn |
US3330895A (en) * | 1962-07-12 | 1967-07-11 | American Cyanamid Co | Method of making acrylic bicomponent yarn or fabric with latent crimp development |
US3166788A (en) * | 1962-10-24 | 1965-01-26 | Monsanto Co | Spinning for conjugate spinning |
US3310456A (en) * | 1962-12-05 | 1967-03-21 | American Cyanamid Co | Composite acrylonitrile fiber dyeable with both acid and basic dyestuffs and method of manufacture |
US3245112A (en) * | 1963-06-27 | 1966-04-12 | Du Pont | Metal to screen seal for spinnerets |
US3324215A (en) * | 1963-11-20 | 1967-06-06 | Dow Chemical Co | Method for preparing crimped acrylonitrile polymer fibers |
US3404204A (en) * | 1964-03-07 | 1968-10-01 | American Cyanamid Co | Method of producing high-shrinkage acrylic fibers |
US3350741A (en) * | 1965-04-22 | 1967-11-07 | Toho Beslon Co | Spinneret device for spinning side-by-side type of composite fibers |
US3320633A (en) * | 1965-08-25 | 1967-05-23 | Du Pont | Apparatus for forming two component yarns |
US3375548A (en) * | 1965-09-29 | 1968-04-02 | Mitsubishi Rayon Co | Apparatus for producing conjugated filaments |
US3425091A (en) * | 1966-12-12 | 1969-02-04 | Kanebo Ltd | Spinneret and nozzle assembly for the manufacture of composite filaments |
US3621087A (en) * | 1967-07-31 | 1971-11-16 | Toyo Rayon Co Ltd | Process for the preparation of acrylic fibers with odd-shaped sections |
US3602014A (en) * | 1968-05-31 | 1971-08-31 | Allied Chem | Ladies hosiery of improved stretch properties made from bifilament yarns |
US4941812A (en) * | 1988-05-10 | 1990-07-17 | E. I. Du Pont De Nemours And Company | Spinneret for production of a hollow filament within a hollow filament composite fiber having spacing means |
US5458968A (en) * | 1994-01-26 | 1995-10-17 | Monsanto Company | Fiber bundles including reversible crimp filaments having improved dyeability |
US6413071B1 (en) | 2000-03-27 | 2002-07-02 | Basf Corporation | Thin plate spinnerette assembly |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1867298A (en) * | 1928-05-05 | 1932-07-12 | American Bemberg Corp | Artificial yarn, particularly artificial silk yarn |
BE427913A (en) * | 1937-05-11 | |||
US2439814A (en) * | 1943-05-13 | 1948-04-20 | American Viscose Corp | Crimped artificial filament |
US2443711A (en) * | 1943-05-13 | 1948-06-22 | American Viscose Corp | Method of manufacturing artificial filaments |
US2517946A (en) * | 1946-10-03 | 1950-08-08 | Kohorn Henry Von | Method of producing yarn |
-
1959
- 1959-02-16 US US793502A patent/US2988420A/en not_active Expired - Lifetime
-
1960
- 1960-02-01 BE BE587165A patent/BE587165A/en unknown
- 1960-02-09 DE DE19601435610 patent/DE1435610A1/en active Pending
- 1960-02-09 CH CH1431362A patent/CH419434A/en unknown
- 1960-02-09 FR FR818013A patent/FR1248593A/en not_active Expired
- 1960-02-15 GB GB5319/60A patent/GB944424A/en not_active Expired
- 1960-02-15 SE SE1519/60A patent/SE300282B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
US2988420A (en) | 1961-06-13 |
CH419434A (en) | 1966-08-31 |
FR1248593A (en) | 1961-03-09 |
BE587165A (en) | 1960-08-01 |
DE1435610A1 (en) | 1969-02-13 |
SE300282B (en) | 1968-04-22 |
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