GB1247222A – A method for manufacturing acrylonitrile polymer filaments
– Google Patents
GB1247222A – A method for manufacturing acrylonitrile polymer filaments
– Google Patents
A method for manufacturing acrylonitrile polymer filaments
Info
Publication number
GB1247222A
GB1247222A
GB6178268A
GB6178268A
GB1247222A
GB 1247222 A
GB1247222 A
GB 1247222A
GB 6178268 A
GB6178268 A
GB 6178268A
GB 6178268 A
GB6178268 A
GB 6178268A
GB 1247222 A
GB1247222 A
GB 1247222A
Authority
GB
United Kingdom
Prior art keywords
filaments
relaxation
weight
drying
treatment
Prior art date
1968-12-30
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
Application number
GB6178268A
Inventor
Makoto Tanaka
Shigeru Kikuchi
Keishiro Ueno
Shoji Imao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon Co Ltd
Priority date (The priority date 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 date listed.)
1968-12-30
Filing date
1968-12-30
Publication date
1971-09-22
1968-12-30
Application filed by Mitsubishi Rayon Co Ltd
filed
Critical
Mitsubishi Rayon Co Ltd
1968-12-30
Priority to GB6178268A
priority
Critical
patent/GB1247222A/en
1971-09-22
Publication of GB1247222A
publication
Critical
patent/GB1247222A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
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
D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
Abstract
1,247,222. Making acrylonitrile polymer filaments. MITSUBISHI RAYON CO. Ltd. 30 Dec., 1968, No. 61782/68. Heading B5B. Acrylonitrile polymer solutions are wet spun or dry spun to form filaments which are stretched, in hot water, washed either before, during or after the stretching operation and dried in a state having a moisture regain higher than 15% while they are relaxed in a humid stream of air or other gas maintained at a dew point within the range of from 45‹ to 100‹ C. and a dry bulb temperature within the range 130‹ to 180‹ C., whereby voids within the filaments which formed during the spinning step are caused to collapse, the period of the drying operation being long enough to allow this collapse to occur. The heat shrinkage of the filaments during the relaxation and drying step may be 15 to 30%. If the filaments are formed by wet spinning the moisture regain of the gaseous medium in the relaxing and drying zone may be higher than 50%. The stretched filaments may be subjected to a pre-shrinkage treatment before supplying them to the relaxation and drying zone. The total shrinkage of the filaments after the relaxation and drying step may be 18 to 35%. The filaments may be mechanically crimped prior to the relaxation and drying treatment. The solvent content of the filaments before the relaxation and drying treatment is preferably below 3À0% by weight and more preferably below 1À5% by weight. In a set of examples furnished the spinning solution contains 20À5% by weight of the polymer and is prepared by dissolving a copolymer of 95% by weight of acrylonitrile and 5% of vinyl acetate in dimethyl formamide. The solution is wet spun into an aqueous coagulating bath containing 40% by weight of DMF and maintained at 30‹ C. The filaments thereby formed are washed and stretched in water at 100‹ C. at a stretch ratio of 5À0 and then oiled. The moisture regain of the oiled filaments in a swollen gel condition is adjusted to 120%. The relaxation and drying treatment of the filaments is effected in air maintained (in different examples) at 140‹ and 160‹ C., the dew point of the air ranging from 59‹ to 100‹ C., the treatment being applied for 10 minutes. The filaments shrink about 19 to 28% during the treatment. In a different example a similar spinning solution is dry spun in to air maintained at 220‹ C., the taken-up filaments thereby formed containing about 9% by weight of the solvent. The filaments are then treated in a manner similar to that employed in the previous examples.
GB6178268A
1968-12-30
1968-12-30
A method for manufacturing acrylonitrile polymer filaments
Expired
GB1247222A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB6178268A
GB1247222A
(en)
1968-12-30
1968-12-30
A method for manufacturing acrylonitrile polymer filaments
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB6178268A
GB1247222A
(en)
1968-12-30
1968-12-30
A method for manufacturing acrylonitrile polymer filaments
Publications (1)
Publication Number
Publication Date
GB1247222A
true
GB1247222A
(en)
1971-09-22
Family
ID=10487445
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB6178268A
Expired
GB1247222A
(en)
1968-12-30
1968-12-30
A method for manufacturing acrylonitrile polymer filaments
Country Status (1)
Country
Link
GB
(1)
GB1247222A
(en)
1968
1968-12-30
GB
GB6178268A
patent/GB1247222A/en
not_active
Expired
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