GB356327A - Manufacture of hollow artificial silk - Google Patents
Manufacture of hollow artificial silkInfo
- Publication number
- GB356327A GB356327A GB18381/30A GB1838130A GB356327A GB 356327 A GB356327 A GB 356327A GB 18381/30 A GB18381/30 A GB 18381/30A GB 1838130 A GB1838130 A GB 1838130A GB 356327 A GB356327 A GB 356327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acetone
- mixture
- solvent
- solvents
- thread
- 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
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
- D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
- D01F2/30—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate by the dry spinning process
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
Hollow threads of artificial silk are obtained by dissolving an acidyl cellulose in a mixture of one or more solvents with one or more non-solvents other than alcohol which have a higher boiling-point than the solvents and which constitute at least 20 per cent of the solvent mixture; preheating the solution before it leaves the spinning nozzle, preferably to a temperature as high as possible, and spinning into an atmosphere having a temperature below the boiling point of the non-solvent or non-solvents. Thus, acetyl cellulose soluble in acetone is dissolved in a mixture of 75-80 parts acetone and 25-20 parts toluene to form a 20-24 per cent solution; the solution is heated to 50-85 DEG C. and spun from a nozzle having orifices 0,07-0,10 mm. into an atmosphere of about 20-70 DEG C. to give a thread having a single titre of about 4 deniers. The thread produced is in the form of a crumpled tube having a multilobate, roundish section of great bulk. Instead of acetone other solvents such as methylene chloride and ethyl chloride may be used; toluene may be replaced by benzene, xylene, hydroaromatic or aliphatic hydrocarbons, ether, or a mixture of such. The spinning conditions are adjusted so that a hard surface is formed on the filaments by the rapid evaporation of the solvent and the consequential increase in proportion of non-solvent. For threads of finer titre, the proportion of non-solvent is increased. The spinning solution, should be free from water and the drying air should be sufficiently dry to avoid condensation of moisture on the thread; it is advisable to arrange the collecting or winding device in an atmosphere of raised temperature and low moisture content. The threads are generally spun in a closed shaft-like cell, the drying air being introduced either in countercurrent or parallel. Air currents may also flow in both directions, leaving the cell by a common outlet advantageously situated near the zone at which the hollow space is formed; in this case the countercurrent is at a higher temperature to counteract any tendency of the hollow thread to collapse. Eddies may be produced by constrictions &c. to promote evaporation at particular zones; similar effects may be obtained by devices adapted to radiate heat, e.g. a heating lamp furnished with a concave mirror. A number of examples are given relating to solutions of acetone-soluble cellulose acetate, containing 54 per cent acetic acid, dissolved in a 80/20 mixture of acetone-toluene and including counter and parallel currents and also a cell with a constriction. The Specification as open to inspection under Sect. 91 (3) (a) describes also the following:-An acetone-soluble cellulose acetate dissolved in a mixture of 60 parts acetone, 30-35 parts benzene and 10-5 parts methyl alcohol, to produce a 24 per cent solution, is heated to 60-65 DEG C. and spun at a draught speed of 100 metres per minute into a countercurrent of air heated to 35 DEG C., to produce a thread of 4 1/2 to 6 deniers which is of multilobate cross section with an internal hollow space. With similar conditions a solvent mixture composed of acetone, benzene, alcohol in the ratios 60 : 20 : 20 gives solid threads. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE356327X | 1929-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB356327A true GB356327A (en) | 1931-09-10 |
Family
ID=6290254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18381/30A Expired GB356327A (en) | 1929-06-14 | 1930-06-16 | Manufacture of hollow artificial silk |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR697329A (en) |
GB (1) | GB356327A (en) |
NL (1) | NL31415C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2880056A (en) * | 1956-04-09 | 1959-03-31 | Dow Chemical Co | Synthetic fibers having a natural crimp and method for preparing the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2833493C2 (en) * | 1978-07-31 | 1989-10-12 | Akzo Gmbh, 5600 Wuppertal | Hollow filaments |
-
0
- NL NL31415D patent/NL31415C/xx active
-
1930
- 1930-06-13 FR FR697329D patent/FR697329A/en not_active Expired
- 1930-06-16 GB GB18381/30A patent/GB356327A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2880056A (en) * | 1956-04-09 | 1959-03-31 | Dow Chemical Co | Synthetic fibers having a natural crimp and method for preparing the same |
Also Published As
Publication number | Publication date |
---|---|
FR697329A (en) | 1931-01-15 |
NL31415C (en) |
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