ES346104A1 - Process for the production of acrylic composite fibres - Google Patents
Process for the production of acrylic composite fibresInfo
- Publication number
- ES346104A1 ES346104A1 ES346104A ES346104A ES346104A1 ES 346104 A1 ES346104 A1 ES 346104A1 ES 346104 A ES346104 A ES 346104A ES 346104 A ES346104 A ES 346104A ES 346104 A1 ES346104 A1 ES 346104A1
- Authority
- ES
- Spain
- Prior art keywords
- polymer
- acrylonitrile
- shrinkable polymer
- content
- shrinkable
- 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
A spirally crimped composite acrylic filament consisting of two acrylonitrile polymers or copolymers in lamellar longitudinal arrangement is produced by wet spinning two different acrylonitrile polymer or copolymer spinning solutions to form a composite filament which is washed and stretched to produce a swollen gel filament having a moisture content of at least 40%, and, without intermediate drying, relaxing the swollen gel filament in hot water or steam at 60 to 130 C. whilst free from tension and then drying the filament to fully develop its latent spiral crimp, the composition of the spinning solutions being chosen so that the polymer forming the inner element of the crimp is the higher shrinking component and has a degree of irreversible swelling of from 0À05 to 3 greater than that of the lower shrinking component. The acrylonitrile content of the more shrinkable polymer may be up to 10% by weight greater than that of the less shrinkable polymer. In particular the outer less shrinkable polymer may contain at least 88% of acrylonitrile, this content being at least 2% lower than that of the inner polymer. However the two acrylonitrile polymers may differ in acrylonitrile content by not more than 0À5% providing there is a concentration of strongly acidic groups in the inner more shrinkable polymer greater than that in the less shrinkable polymer by 10 to 30 milliequivalents per kilogram of polymer, or that there is a content of neutral or weakly acidic hydrophilic groups in the more shrinkable which is greater by 3 to 10% than that in the less shrinkable polymer, or that the concentration of polymer in the spinning solution which is to provide the more shrinkable polymer is lower by 0À3-5% than that in the spinning solution which is to provide the less shrinkable polymer, or that the molecular weight of the more shrinkable polymer is lower than that of the less shrinkable polymer by at least 0À1 unit when measured in terms of intrinsic viscosity in dimethylformamide at 30 C. Finally, the difference in the degree of irreversible swelling may be brought about by difference in the comonomer content of the polymers.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6853366 | 1966-10-17 | ||
| JP6853266A JPS5026654B1 (en) | 1966-10-17 | 1966-10-17 | |
| JP6853466A JPS5026655B1 (en) | 1966-10-17 | 1966-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES346104A1 true ES346104A1 (en) | 1968-12-01 |
Family
ID=27299776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES346104A Expired ES346104A1 (en) | 1966-10-17 | 1967-10-16 | Process for the production of acrylic composite fibres |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE705194A (en) |
| BR (1) | BR6793897D0 (en) |
| DE (1) | DE1660411B2 (en) |
| ES (1) | ES346104A1 (en) |
| GB (1) | GB1207990A (en) |
| NL (1) | NL139045B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733470B (en) * | 2020-06-12 | 2022-11-08 | 温州大学 | Self-crimping composite moisture absorption fiber, preparation method and fabric |
-
1967
- 1967-10-16 ES ES346104A patent/ES346104A1/en not_active Expired
- 1967-10-16 BE BE705194D patent/BE705194A/xx not_active Expired
- 1967-10-16 NL NL6714018A patent/NL139045B/en unknown
- 1967-10-16 BR BR19389767A patent/BR6793897D0/en unknown
- 1967-10-17 GB GB4737467A patent/GB1207990A/en not_active Expired
- 1967-10-17 DE DE19671660411 patent/DE1660411B2/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| BE705194A (en) | 1968-04-16 |
| NL139045B (en) | 1973-06-15 |
| BR6793897D0 (en) | 1973-07-17 |
| DE1660411A1 (en) | 1971-08-12 |
| NL6714018A (en) | 1968-04-18 |
| DE1660411B2 (en) | 1976-05-06 |
| GB1207990A (en) | 1970-10-07 |
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