FR2304698A1 - Crimped polyester yarns based on ethylene terephthalate - with cross-sectional temp gradient set up in specif filaments - Google Patents
Crimped polyester yarns based on ethylene terephthalate - with cross-sectional temp gradient set up in specif filamentsInfo
- Publication number
- FR2304698A1 FR2304698A1 FR7508829A FR7508829A FR2304698A1 FR 2304698 A1 FR2304698 A1 FR 2304698A1 FR 7508829 A FR7508829 A FR 7508829A FR 7508829 A FR7508829 A FR 7508829A FR 2304698 A1 FR2304698 A1 FR 2304698A1
- Authority
- FR
- France
- Prior art keywords
- yarn
- ethylene terephthalate
- filaments
- stretching
- specif
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/004—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by heating fibres, filaments, yarns or threads so as to create a temperature gradient across their diameter, thereby imparting them latent asymmetrical shrinkage properties
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Artificial Filaments (AREA)
- Multicomponent Fibers (AREA)
Abstract
In the prodn. of a polyester yarn based on ethylene terephthalate, which, on detenting is capable of crimping, the pref. yarn has a double refractive index of 0.03-0.07, a capacity to shrink in boiling water of 40-80% and a crystallinity of is not >3%. Its matl. is for pref. a homopolymer or a copolymer with a large content of ethylene terephthalate units and a small content of units of a diol or an aromatic diacid derived elsewhere than from ethylene glycol or terephthalic acid. It is subjected to such a degree of stretching that after being stretching its elasticity is reduced to a value 15%. The stretching is localised at a point where the yarn shows a drop in temp. across its section, brought about by a brief passage of the yarn across a fixed, polished convexly curved surface maintained at a tem&. 2-30 degrees C below the m. pt. of the polymer. The process enables a satisfactory degree of crimp to be imparted at high speed. The crimps are fine and the elasticity of the yarn is good. There is no deformation of the section of the filaments and no trace of melting on their surfaces.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7508829A FR2304698A1 (en) | 1975-03-19 | 1975-03-19 | Crimped polyester yarns based on ethylene terephthalate - with cross-sectional temp gradient set up in specif filaments |
JP2820676A JPS51116222A (en) | 1975-03-19 | 1976-03-17 | Manufacture of crimped yarn |
DE19762611766 DE2611766A1 (en) | 1975-03-19 | 1976-03-19 | METHOD FOR MANUFACTURING A CURLED YARN AND THE PRODUCT SO MANUFACTURED |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7508829A FR2304698A1 (en) | 1975-03-19 | 1975-03-19 | Crimped polyester yarns based on ethylene terephthalate - with cross-sectional temp gradient set up in specif filaments |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2304698A1 true FR2304698A1 (en) | 1976-10-15 |
FR2304698B1 FR2304698B1 (en) | 1977-11-25 |
Family
ID=9152868
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7508829A Granted FR2304698A1 (en) | 1975-03-19 | 1975-03-19 | Crimped polyester yarns based on ethylene terephthalate - with cross-sectional temp gradient set up in specif filaments |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS51116222A (en) |
DE (1) | DE2611766A1 (en) |
FR (1) | FR2304698A1 (en) |
-
1975
- 1975-03-19 FR FR7508829A patent/FR2304698A1/en active Granted
-
1976
- 1976-03-17 JP JP2820676A patent/JPS51116222A/en active Pending
- 1976-03-19 DE DE19762611766 patent/DE2611766A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS51116222A (en) | 1976-10-13 |
FR2304698B1 (en) | 1977-11-25 |
DE2611766A1 (en) | 1976-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |