GB701806A - Improvements in and relating to the production of synthetic threads, fibres, filaments and like filamentary materials - Google Patents
Improvements in and relating to the production of synthetic threads, fibres, filaments and like filamentary materialsInfo
- Publication number
- GB701806A GB701806A GB779151A GB779151A GB701806A GB 701806 A GB701806 A GB 701806A GB 779151 A GB779151 A GB 779151A GB 779151 A GB779151 A GB 779151A GB 701806 A GB701806 A GB 701806A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- swelling agent
- annealed
- stretched
- water
- 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
- 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
- D01F6/72—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyureas
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Preformed polythiourea threads are stretched at least 450 per cent. in the presence of a swelling agent and at an elevated temperature in such a manner that the extensibility of the stretched thread is at least 15 to 25 per cent. and then annealed without allowing them to retract. The threads are considered to be annealed when they do not shrink more than 6 per cent. when heated in air for 20 minutes at 70 DEG C. in freely relaxed condition. Water is the preferred swelling agent. The stretching may be preferably effected in stages using known stretching devices. The annealing is carried out in a heated atmosphere after removal of the swelling agent, for example by drying when the swelling agent is water. In an example a hexamethylene polythiourea thread is stretched 513 per cent. in water at 65 DEG C. in three stages, and then dried by passage over a heated roller. It is then annealed by heating at constant length while wound on a bobbin for one hour in air at 70 DEG C. and then for a further hour at 90 DEG C. Specifications 524,795, 534,699 and 660,905, are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB779151A GB701806A (en) | 1951-04-04 | 1951-04-04 | Improvements in and relating to the production of synthetic threads, fibres, filaments and like filamentary materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB779151A GB701806A (en) | 1951-04-04 | 1951-04-04 | Improvements in and relating to the production of synthetic threads, fibres, filaments and like filamentary materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB701806A true GB701806A (en) | 1954-01-06 |
Family
ID=9839805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB779151A Expired GB701806A (en) | 1951-04-04 | 1951-04-04 | Improvements in and relating to the production of synthetic threads, fibres, filaments and like filamentary materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB701806A (en) |
-
1951
- 1951-04-04 GB GB779151A patent/GB701806A/en not_active Expired
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