GB918930A - Improvements in or relating to the manufacture of polyamide filaments - Google Patents
Improvements in or relating to the manufacture of polyamide filamentsInfo
- Publication number
- GB918930A GB918930A GB29081/60A GB2908160A GB918930A GB 918930 A GB918930 A GB 918930A GB 29081/60 A GB29081/60 A GB 29081/60A GB 2908160 A GB2908160 A GB 2908160A GB 918930 A GB918930 A GB 918930A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyamide
- water
- chips
- inert gas
- pressure
- 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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/04—Melting filament-forming substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/46—Post-polymerisation treatment
-
- 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
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
-
- 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
- Y10S264/56—Processes of molding lactams
Abstract
In the manufacture of polyamide filaments by melting polycaprolactam chips at 250 DEG -295 DEG C. under an inert gas at a pressure of 0,5-5 atmospheres and melt spinning the polyamide, the chips have been washed with water but not dried or only incompletely dried and contain over 1/4 % by weight of water and the polyamide is maintained in a molten condition for a period not exceeding in minutes the expression:- <FORM:0918930/IV(a)/1> in which e=the base of the natural logarithms, T=temperature in DEG C., P=pressure in atmospheres of inert gas, E=sum of the free amine and carboxyl end groups in the polymer expressed in gram equivalents per million grams. The determination may be carried out on a sample of the polymer taken from the melt pool or on a sample of the extruded filaments. The earlier stages of the washing of the chips may be carried out with aqueous solutions, e.g. of caprolactam, pure water being subsequently used. The time during which the polyamide is maintained in a molten condition is preferably not more than 80% of the specified maximum permissible period. The inert gas may be nitrogen, steam, helium or hydrogen, preferably steam at within 3% of the prevailing atmospheric pressure. It is preferable to use polyamide chips containing over 3 1/2 % of water, e.g. up to 7% or over provided their water content is not so high as to cause caking or paste formation. Specifications 461,237, 653,757, 676,585, 747,913, 813,527, French Specification 882,461 and U.S.A. Specification 2,241,321 are referred to.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL268474D NL268474A (en) | 1960-08-23 | ||
GB29081/60A GB918930A (en) | 1960-08-23 | 1960-08-23 | Improvements in or relating to the manufacture of polyamide filaments |
US124394A US3093445A (en) | 1960-08-23 | 1961-07-17 | Manufacture of polyamide filaments |
ES0269475A ES269475A1 (en) | 1960-08-23 | 1961-07-31 | Manufacture of polyamide filaments |
CH986061A CH415943A (en) | 1960-08-23 | 1961-08-23 | Process for the production of polyamide fibers |
DE19611469032 DE1469032A1 (en) | 1960-08-23 | 1961-08-23 | Process for the production of polyamide fibers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB29081/60A GB918930A (en) | 1960-08-23 | 1960-08-23 | Improvements in or relating to the manufacture of polyamide filaments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB918930A true GB918930A (en) | 1963-02-20 |
Family
ID=10285853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29081/60A Expired GB918930A (en) | 1960-08-23 | 1960-08-23 | Improvements in or relating to the manufacture of polyamide filaments |
Country Status (6)
Country | Link |
---|---|
US (1) | US3093445A (en) |
CH (1) | CH415943A (en) |
DE (1) | DE1469032A1 (en) |
ES (1) | ES269475A1 (en) |
GB (1) | GB918930A (en) |
NL (1) | NL268474A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4632159A (en) * | 1984-03-07 | 1986-12-30 | Glasgo Marion L | Clamp-on marking template and saw guide for making dovetail joints |
EP0201189A3 (en) * | 1985-04-22 | 1989-04-05 | Basf Corporation | Improved high speed process of making polyamide filaments |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL136087C (en) * | 1962-01-15 | |||
US3271817A (en) * | 1963-05-27 | 1966-09-13 | Maurice S Kanbar | Nylon melt-spinning apparatus |
JPS5390420A (en) * | 1977-01-13 | 1978-08-09 | Teijin Ltd | Polyamide yarn |
DE3710803A1 (en) * | 1987-03-31 | 1988-10-20 | Basf Ag | METHOD FOR REMOVING CAPROLACTAM AND ITS OLIGOMERS FROM SUCH CONTAINING POLYAMIDE GRANULES |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2571975A (en) * | 1947-05-10 | 1951-10-16 | Du Pont | Melt spinning process |
-
0
- NL NL268474D patent/NL268474A/xx unknown
-
1960
- 1960-08-23 GB GB29081/60A patent/GB918930A/en not_active Expired
-
1961
- 1961-07-17 US US124394A patent/US3093445A/en not_active Expired - Lifetime
- 1961-07-31 ES ES0269475A patent/ES269475A1/en not_active Expired
- 1961-08-23 CH CH986061A patent/CH415943A/en unknown
- 1961-08-23 DE DE19611469032 patent/DE1469032A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4632159A (en) * | 1984-03-07 | 1986-12-30 | Glasgo Marion L | Clamp-on marking template and saw guide for making dovetail joints |
EP0201189A3 (en) * | 1985-04-22 | 1989-04-05 | Basf Corporation | Improved high speed process of making polyamide filaments |
Also Published As
Publication number | Publication date |
---|---|
ES269475A1 (en) | 1962-03-16 |
CH415943A (en) | 1966-06-30 |
US3093445A (en) | 1963-06-11 |
NL268474A (en) | |
DE1469032A1 (en) | 1969-01-23 |
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