GB1355912A - Process for the production of discontinuous fibrils - Google Patents
Process for the production of discontinuous fibrilsInfo
- Publication number
- GB1355912A GB1355912A GB3657372A GB3657372A GB1355912A GB 1355912 A GB1355912 A GB 1355912A GB 3657372 A GB3657372 A GB 3657372A GB 3657372 A GB3657372 A GB 3657372A GB 1355912 A GB1355912 A GB 1355912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- polymer
- solvent
- phase
- fibrils
- 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
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/11—Flash-spinning
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
- Paper (AREA)
Abstract
1355912 Plexifilaments SOLVAY & CIE 4 Aug 1972 [6 Aug 1971] 36573/72 Heading B5B In a process for the production of discontinuous fibrils, a two-phase liquid mixture comprising a molten polymer and a solvent are held at an elevated temperature and pressure until the pressure is suddenly released thus causing evaporation of the solvent and solidification of the polymer into fibrils. The solvent and the concentration of the polymer are chosen to give a two-phase system at elevated temperatures and pressures, the pressure is chosen as that above which the system comprises just one phase and the temperature is sufficiently high to cause the solvent to evaporate upon the release of the pressure but not too high to prevent the solidification of the polymer. In the process, a fluid is introduced into the two-phase system before the pressure reduction is complete. This introduction may be either before the reduction is started, or whilst it is proceeding. One embodiment of apparatus suitable for carrying out the process is illustrated in Fig. 1. It consisits of a pre-release chamber 1, into which a solution of polymer is injected and where the loss of pressure is sufficient to cause the formation of two phases, and channel 4 leading to the orifice at which the pressure is suddenly reduced to ambient. The liquid is introduced into the two-phase system by means of channels 3. Examples illustrate the formation of filaments of polyvinyl chloride, polyvinylidene fluoride and polyethylene. The fluids used in the examples are nitrogen, water and dichloroethane.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU63673 | 1971-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1355912A true GB1355912A (en) | 1974-06-12 |
Family
ID=19726794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3657372A Expired GB1355912A (en) | 1971-08-06 | 1972-08-04 | Process for the production of discontinuous fibrils |
Country Status (20)
| Country | Link |
|---|---|
| JP (1) | JPS568123B1 (en) |
| AR (1) | AR194260A1 (en) |
| AT (1) | AT335039B (en) |
| AU (1) | AU456038B2 (en) |
| BE (1) | BE787032A (en) |
| BR (1) | BR7205240D0 (en) |
| CA (1) | CA1049213A (en) |
| CH (1) | CH562887A5 (en) |
| DD (1) | DD100499A5 (en) |
| DE (1) | DE2237285C2 (en) |
| ES (1) | ES404590A1 (en) |
| FR (1) | FR2148449B1 (en) |
| GB (1) | GB1355912A (en) |
| IT (1) | IT963504B (en) |
| LU (1) | LU63673A1 (en) |
| NL (1) | NL7210518A (en) |
| PL (1) | PL82153B1 (en) |
| RO (1) | RO61753A (en) |
| TR (1) | TR17492A (en) |
| ZA (1) | ZA725286B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257842A (en) | 1976-06-22 | 1981-03-24 | Montedison S.P.A. | Preparing permanently embossed, highly porous wallpapers |
| GB2187133A (en) * | 1986-02-28 | 1987-09-03 | Extrusion Systems Ltd | Spinning die for production of blown fibre |
| US4710336A (en) * | 1982-04-27 | 1987-12-01 | Montedison S.P.A. | Process for preparing two-component synthetic fibers suited for replacing cellulose fibers |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE795841A (en) * | 1972-02-25 | 1973-08-23 | Montedison Spa | PROCESS FOR PREPARING FIBERS FROM POLYMERIC MATERIALS, SUITABLE FOR THE PREPARATION OF PAPER PULP |
| LU67153A1 (en) * | 1973-03-02 | 1974-10-09 | ||
| DE2326143B2 (en) * | 1973-05-23 | 1979-04-05 | Basf Ag, 6700 Ludwigshafen | Process for the production of short fibers from thermoplastics |
| IT1001664B (en) * | 1973-11-08 | 1976-04-30 | Sir Soc Italiana Resine Spa | MICROFIBROUS PRODUCT SUITABLE FOR ES SERE USED IN THE PRODUCTION OF SYNTHETIC CARDS AND RELATED PROCESS OF PREPARATION |
| DE2363672C3 (en) * | 1973-12-21 | 1982-08-05 | Basf Ag, 6700 Ludwigshafen | Process for the production of short fibers from low-pressure polyethylene and their use |
| LU76197A1 (en) * | 1976-11-12 | 1978-07-10 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3081519A (en) * | 1962-01-31 | 1963-03-19 | Fibrillated strand | |
| DE1934541A1 (en) * | 1969-07-08 | 1971-01-14 | Basf Ag | Method and device for the production of staple fibers from thermoplastics |
-
0
- BE BE787032D patent/BE787032A/xx not_active IP Right Cessation
-
1971
- 1971-08-06 LU LU63673A patent/LU63673A1/xx unknown
-
1972
- 1972-07-06 ES ES404590A patent/ES404590A1/en not_active Expired
- 1972-07-27 AR AR243293A patent/AR194260A1/en active
- 1972-07-28 IT IT27595/72A patent/IT963504B/en active
- 1972-07-28 DE DE2237285A patent/DE2237285C2/en not_active Expired
- 1972-07-31 NL NL7210518A patent/NL7210518A/xx unknown
- 1972-07-31 AU AU45145/72A patent/AU456038B2/en not_active Expired
- 1972-08-01 ZA ZA725286A patent/ZA725286B/en unknown
- 1972-08-01 FR FR7227779A patent/FR2148449B1/fr not_active Expired
- 1972-08-03 CA CA148,706A patent/CA1049213A/en not_active Expired
- 1972-08-03 BR BR5240/72A patent/BR7205240D0/en unknown
- 1972-08-04 PL PL1972157120A patent/PL82153B1/xx unknown
- 1972-08-04 GB GB3657372A patent/GB1355912A/en not_active Expired
- 1972-08-04 RO RO71860A patent/RO61753A/ro unknown
- 1972-08-04 AT AT676372A patent/AT335039B/en not_active IP Right Cessation
- 1972-08-04 CH CH1159072A patent/CH562887A5/xx not_active IP Right Cessation
- 1972-08-04 DD DD164870A patent/DD100499A5/xx unknown
- 1972-08-04 TR TR17492A patent/TR17492A/en unknown
- 1972-08-07 JP JP7906172A patent/JPS568123B1/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257842A (en) | 1976-06-22 | 1981-03-24 | Montedison S.P.A. | Preparing permanently embossed, highly porous wallpapers |
| US4710336A (en) * | 1982-04-27 | 1987-12-01 | Montedison S.P.A. | Process for preparing two-component synthetic fibers suited for replacing cellulose fibers |
| GB2187133A (en) * | 1986-02-28 | 1987-09-03 | Extrusion Systems Ltd | Spinning die for production of blown fibre |
| GB2187133B (en) * | 1986-02-28 | 1989-11-08 | Extrusion Systems Ltd | Spinning die for use in the production of blown fibre |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2237285A1 (en) | 1973-02-15 |
| PL82153B1 (en) | 1975-10-31 |
| NL7210518A (en) | 1973-02-08 |
| TR17492A (en) | 1975-07-23 |
| IT963504B (en) | 1974-01-21 |
| DD100499A5 (en) | 1973-09-20 |
| AU4514572A (en) | 1974-02-07 |
| JPS568123B1 (en) | 1981-02-21 |
| ZA725286B (en) | 1973-04-25 |
| CH562887A5 (en) | 1975-06-13 |
| ES404590A1 (en) | 1975-06-16 |
| AR194260A1 (en) | 1973-06-29 |
| FR2148449A1 (en) | 1973-03-23 |
| AT335039B (en) | 1977-02-25 |
| BE787032A (en) | 1973-02-01 |
| DE2237285C2 (en) | 1985-03-07 |
| FR2148449B1 (en) | 1975-03-07 |
| AU456038B2 (en) | 1974-12-12 |
| LU63673A1 (en) | 1973-02-08 |
| CA1049213A (en) | 1979-02-27 |
| ATA676372A (en) | 1976-06-15 |
| BR7205240D0 (en) | 1973-05-24 |
| RO61753A (en) | 1977-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |