US2681266A - Melt spinning method - Google Patents
Melt spinning method Download PDFInfo
- Publication number
- US2681266A US2681266A US178788A US17878850A US2681266A US 2681266 A US2681266 A US 2681266A US 178788 A US178788 A US 178788A US 17878850 A US17878850 A US 17878850A US 2681266 A US2681266 A US 2681266A
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- spinning
- melt spinning
- spinning method
- melting
- molten
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- 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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
Definitions
- This invention relates to an improved method for molten flux spinning of polyamides.
- the invention relates to a new method for molten flux spinning of plye-aminocaprolactam.
- the polyamide is molten in a melting device, flows from there into a supply chamber (sump) and goes from there, via a pressure pump and a measuring pump to the spinning nozzle.
- the entire device is surrounded by a heating jacket which heats the spinning mass to spinning temperature, i. e. to at least 40 C. above the melting point of the polyamide.
- the temperature of the heating jacket must lie -30 C. higher, or, in all, 60-70 C. above the melting point of the polyamides, and the same temperature obtains in the melting device.
- Reference No. l is the heating jacket for the melting-device 2 as well as the supply chamber (sump) 3 for the flux supplied by the melting-device 2.
- the heating of the flux to spinning temperature which is about 250 C., a further thermic reversion of 0.5%.
- a method of spinning poly-E-amino caprolactam which comprises the steps of melting containing sub- References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,207,426 Bailey July 9, 1940 2,217,743 Greenewalt Oct. 15, 1940 2,241,321 Schlack May 6, 1041 2,514,189 Spencer et al July 4, 1950 2,515,136 Pigott July 11, 1950
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Polyamides (AREA)
Description
June 15, 1954 P. KUMMEL 2,681,266 MELT SPINNING METHOD Filed Aug. 11, 1950 IN V EN T OR. F3404 K071014154 A rroaxvsy Patented June 15, 1954 2,681,266 MELT SPINNING METHOD Paul Kiimmel, Ems, Switzerland, assignor to Inventa A. G. fur Forschung und Patentver- Wertung, Lucerne, Switzerland Application August 11, 1950, Serial No. 178,788
1 Claim.
This invention relates to an improved method for molten flux spinning of polyamides.
More particularly the invention relates to a new method for molten flux spinning of plye-aminocaprolactam.
In the usual apparatus for molten spinning of polyamides, the polyamide is molten in a melting device, flows from there into a supply chamber (sump) and goes from there, via a pressure pump and a measuring pump to the spinning nozzle.
The entire device is surrounded by a heating jacket which heats the spinning mass to spinning temperature, i. e. to at least 40 C. above the melting point of the polyamide. In order to achieve this, the temperature of the heating jacket must lie -30 C. higher, or, in all, 60-70 C. above the melting point of the polyamides, and the same temperature obtains in the melting device.
sump of 550 com). Such a high extract content is not bearable for the production of fibers and threads; the monomers must be subsequently washed out and are lost in the wash-water.
It is necessary to make the sump larger than hitherto usual, so that the molten supply contained therein will be suflicient for spinning about 90 minutes, as only thus will the polymerisate be completely liquified at the low melting temperature.
The accompanying drawing shows schematically a spinning device for molten flux spinning according to the invention. Reference No. l is the heating jacket for the melting-device 2 as well as the supply chamber (sump) 3 for the flux supplied by the melting-device 2.
In the process according to the invention, the
data explain the process in invention:
the heating of the flux to spinning temperature, which is about 250 C., a further thermic reversion of 0.5%.
The process according to the invention, with a spinning extract of 3% as compared with the 5.9% of previous processes, exhibits the important advantage of a smaller reversion of water-soluble monomers of 2.9%, which, in the hitherto practiced processes are lost with the Wash-water.
I claim:
A method of spinning poly-E-amino caprolactam which comprises the steps of melting containing sub- References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,207,426 Bailey July 9, 1940 2,217,743 Greenewalt Oct. 15, 1940 2,241,321 Schlack May 6, 1041 2,514,189 Spencer et al July 4, 1950 2,515,136 Pigott July 11, 1950
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US178788A US2681266A (en) | 1950-08-11 | 1950-08-11 | Melt spinning method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US178788A US2681266A (en) | 1950-08-11 | 1950-08-11 | Melt spinning method |
Publications (1)
Publication Number | Publication Date |
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US2681266A true US2681266A (en) | 1954-06-15 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US178788A Expired - Lifetime US2681266A (en) | 1950-08-11 | 1950-08-11 | Melt spinning method |
Country Status (1)
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US (1) | US2681266A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3382305A (en) * | 1954-10-29 | 1968-05-07 | Du Pont | Process for preparing oriented microfibers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2207426A (en) * | 1938-02-26 | 1940-07-09 | Hartford Empire Co | Apparatus and method for the preparation and handling of plastic material |
US2217743A (en) * | 1939-03-28 | 1940-10-15 | Du Pont | Apparatus |
US2241321A (en) * | 1938-06-10 | 1941-05-06 | Ig Farbenindustrie Ag | Preparation of polyamides |
US2514189A (en) * | 1946-11-16 | 1950-07-04 | Method and apparatus for making | |
US2515136A (en) * | 1947-07-18 | 1950-07-11 | Wingfoot Corp | Method of melting polymers |
-
1950
- 1950-08-11 US US178788A patent/US2681266A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2207426A (en) * | 1938-02-26 | 1940-07-09 | Hartford Empire Co | Apparatus and method for the preparation and handling of plastic material |
US2241321A (en) * | 1938-06-10 | 1941-05-06 | Ig Farbenindustrie Ag | Preparation of polyamides |
US2217743A (en) * | 1939-03-28 | 1940-10-15 | Du Pont | Apparatus |
US2514189A (en) * | 1946-11-16 | 1950-07-04 | Method and apparatus for making | |
US2515136A (en) * | 1947-07-18 | 1950-07-11 | Wingfoot Corp | Method of melting polymers |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3382305A (en) * | 1954-10-29 | 1968-05-07 | Du Pont | Process for preparing oriented microfibers |
US3546063A (en) * | 1954-10-29 | 1970-12-08 | Du Pont | Microfibers and shaped structures containing microfibers |
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