GB1225015A - An improved process for manufacturing crimped polyacrylonitrile fibre - Google Patents
An improved process for manufacturing crimped polyacrylonitrile fibreInfo
- Publication number
- GB1225015A GB1225015A GB1744068A GB1744068A GB1225015A GB 1225015 A GB1225015 A GB 1225015A GB 1744068 A GB1744068 A GB 1744068A GB 1744068 A GB1744068 A GB 1744068A GB 1225015 A GB1225015 A GB 1225015A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polyacrylonitrile
- aqueous solution
- weight
- acrylonitrile
- filaments
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Multicomponent Fibers (AREA)
Abstract
1,225,015. Polyacrylonitrile composite heatcrimpable filaments. INSTYTUT WLOKIEN SZTUCZNYCH I SYNTETYCZNYCH. 11 April, 1968 [12 April, 1967], No. 17440/68. Heading B5B. Heat crimpable polyacrylonitrile composite filaments are produced by simultaneously extruding through each extrusion orifice of a spinneret (adapted for the spinning of composite filaments) into a spin bath consisting of a dilute aqueous solution of sodium thiocyanate a solution of polyacrylonitrile in a concentrated aqueous solution of sodium thiocyanate and a solution in a concentrated aqueous solution of sodium thiocyanate of a partially hydrolyzed polyacrylonitrile. The proportion by weight of hydrolysed polyacrylonitrile in the composite filaments may be 5 to 95% (preferably 15 to 50%) based on the weight of the combined spinning solutions. The acrylonitrile polymers used may be the homopolymers or copolymers of acrylonitrile with another monomer, the copolymer containing at least 80% by weight of acrylonitrile units. In an example, two spinning solutions each containing 12% by weight of acrylonitrile polymer dissolved in a 51% aqueous solution of sodium thiocyanate are simultaneously extruded at equal rates without being mixed through each extrusion orifice of a spinneret adapted for the spinning of composite filaments into a 10% aqueous solution of sodium thiocyanate at a temperature of about 10‹ C. to form composite filaments. One polymer is a copolymer of acrylonitrile, methyl acrylate and itaconic acid in the weight ratio 93: 6: 1 and the other polyacrylonitrile which has been partially hydrolysed by boiling with an aqueous solution of a caustic alkali until its nitrogen content is reduced to 22% by weight. The composite filaments thereby formed are stretched in steam at a stretch ratio of 8: 1, washed with water at 50‹ C., dried at 80‹ C. and shrunk in water at 100‹ C. whereby the filaments develop about 6 helical crimps per cm. due to the difference in the shrinkability of polyacrylonitrile and partially hydrolysed polyacrylonitrile.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL119958A PL58347B1 (en) | 1967-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1225015A true GB1225015A (en) | 1971-03-17 |
Family
ID=19949646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1744068A Expired GB1225015A (en) | 1967-04-12 | 1968-04-11 | An improved process for manufacturing crimped polyacrylonitrile fibre |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1577370A (en) |
| GB (1) | GB1225015A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286084A (en) * | 2018-02-11 | 2018-07-17 | 张彪 | A kind of high-crystallinity polypropylene nitrile reinforced polypropylene nitrile composite fibre |
| CN114507905A (en) * | 2020-10-28 | 2022-05-17 | 中国石油化工股份有限公司 | Preparation method of antibacterial moisture-conducting acrylic fiber suitable for industrial continuous production |
-
1968
- 1968-04-11 GB GB1744068A patent/GB1225015A/en not_active Expired
- 1968-04-12 FR FR1577370D patent/FR1577370A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286084A (en) * | 2018-02-11 | 2018-07-17 | 张彪 | A kind of high-crystallinity polypropylene nitrile reinforced polypropylene nitrile composite fibre |
| CN114507905A (en) * | 2020-10-28 | 2022-05-17 | 中国石油化工股份有限公司 | Preparation method of antibacterial moisture-conducting acrylic fiber suitable for industrial continuous production |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1577370A (en) | 1969-08-08 |
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