US2325574A - Manufacture of sheets or bands from highly viscous cellulose solutions - Google Patents
Manufacture of sheets or bands from highly viscous cellulose solutions Download PDFInfo
- Publication number
- US2325574A US2325574A US292041A US29204139A US2325574A US 2325574 A US2325574 A US 2325574A US 292041 A US292041 A US 292041A US 29204139 A US29204139 A US 29204139A US 2325574 A US2325574 A US 2325574A
- Authority
- US
- United States
- Prior art keywords
- spinning
- bands
- sheets
- highly viscous
- temperature
- 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 - Lifetime
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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
- D01F2/02—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from solutions of cellulose in acids, bases or salts
Definitions
- the present invention relates to the production of foils or hands of regenerated cellulose from highly viscous spinning masses.
- This invention relates to a method by which there may be obtained from a highly viscous solution of cellulose, for instance a pasty solution of cellulose in sulphuric acid, phosphoric should not be heated or should be heated to quite,
- a cold spinning mass should be supplied to the spinning slot, 1. e., a spinning mass the temperature of which is below room temperature.
- the temperature should preferably not exceed about 10 C.
- the heating of the spinning mass at that part which after regeneration of the cellulose becomes the'surface of the foil may be achieved by heating uniformly to the required temperature the two edges or lips of the spinning slot. In this manner the outer layers of the spinning mass I are warmed to the necessary degree during their acid or the like, sheets, films or bands having smooth surfaces.
- the new process is characterized by the fact that the highly viscous spinning mass is heated superficially while it passes through the slot of the employed spinning device, that is to say the part of the spinning mass which is to come into contact with the inner surface of the spinning slot is suitably warmed. In this manner the spinning mass is liquefied at its surface by degradation. The viscosity at the surface of the spinning mass can be lowered to a degree at which the issue from the spinning orifice is faultless and the surface of the extruded sheet is quite smooth I passage through the slot.
- the temperature of the lips depends on the temperature of the spinning mass and the period of time during which the latter is in contact with the heated parts. In general the temperature of the spinning lips should be between 30 and C. When the speed of the spinning is very high, the temperature may also be higher, for instance 200 or 300' C.
- a solution of cellulose in sulphuric acid having a temperature between about 0 and 10 C. and containing 7-8 per cent of cellulose, 57-60 per cent of sulphuric acid and the rest water is fed under' a pressure of some atmospheres to a spinning device such as that indicated by way of'example in the accompanying drawing which is a transverse section through the device.
- the spinning device i has a slot 5, the edges of which are .14 mm. distant from each other.
- the length of the path along which the spinning solution 3 flows, namely the heated surfaces 4 of the slot is about 30 mm.
- the speed of discharge of the spinning solution is about 1 m.
- a process for producing bands of regenerated cellulose with smooth surfaces which comprises leading to a spinning slot 9.
Description
July 27, 1943. 7
A. WUNDERER mmumc'ruarz OF srmms on BANDS mom HIGHLY VISCOUS CELLULOSE SQLUTIONS Filed Aug. 26, 1939 INVENTOR HIS ATTORNEYS the paste can be cut with a knife.
PMs-1 21,1943
UNITED smrss PATENT OFFICE MANUFACTURE OF SHEETS OB BANDS VISCOUB OELLULOSE I'BOM HIGHLY SOLUTIONS Anton Wanderer, Wlesbaden-Blebrlch, Germany; yeeted in the Alien Property Custodian Application August 28, 1939, Serial No.
In Germany August 29, 1938 lCiairn. (c1. rs-s'l') The present invention relates to the production of foils or hands of regenerated cellulose from highly viscous spinning masses.
The manufacture of sheets of regenerated cellulose from viscose presents no difiiculties in respect of the production of a smooth surface, so-
in sulphuric acid, phosphoric acid or zinc chloride solution or other solvents which dissolve cellulose. Such solutions when they have the concentration necessary in making sheets and contain, for instance, five per cent or more of cellulose have a pasty consistency; the viscosity is so high, especially at low temperatures, that If such a solution is extruded from a spinning slot into a that its usefulness is generally diminished.
This invention relates to a method by which there may be obtained from a highly viscous solution of cellulose, for instance a pasty solution of cellulose in sulphuric acid, phosphoric should not be heated or should be heated to quite,
a low degree, otherwise there will be too much degradation of the spinning mass, whereby the obtained films would lose too many of their mechanical properties. The interior of the extruded spinning'mass remains therefore pasty. This is the meaning of the term heat superficially.
It is recommended that a cold spinning mass should be supplied to the spinning slot, 1. e., a spinning mass the temperature of which is below room temperature. The temperature should preferably not exceed about 10 C.
The heating of the spinning mass at that part which after regeneration of the cellulose becomes the'surface of the foil may be achieved by heating uniformly to the required temperature the two edges or lips of the spinning slot. In this manner the outer layers of the spinning mass I are warmed to the necessary degree during their acid or the like, sheets, films or bands having smooth surfaces.
The new process is characterized by the fact that the highly viscous spinning mass is heated superficially while it passes through the slot of the employed spinning device, that is to say the part of the spinning mass which is to come into contact with the inner surface of the spinning slot is suitably warmed. In this manner the spinning mass is liquefied at its surface by degradation. The viscosity at the surface of the spinning mass can be lowered to a degree at which the issue from the spinning orifice is faultless and the surface of the extruded sheet is quite smooth I passage through the slot. The temperature of the lips depends on the temperature of the spinning mass and the period of time during which the latter is in contact with the heated parts. In general the temperature of the spinning lips should be between 30 and C. When the speed of the spinning is very high, the temperature may also be higher, for instance 200 or 300' C.
The following example illustrates the invention:
A solution of cellulose in sulphuric acid having a temperature between about 0 and 10 C. and containing 7-8 per cent of cellulose, 57-60 per cent of sulphuric acid and the rest water is fed under' a pressure of some atmospheres to a spinning device such as that indicated by way of'example in the accompanying drawing which is a transverse section through the device. The spinning device i has a slot 5, the edges of which are .14 mm. distant from each other. By means of the channels 2 adapted for circulation of hot water the temperature of these'lips is raised to about 35-40 C. The length of the path along which the spinning solution 3 flows, namely the heated surfaces 4 of the slot is about 30 mm. The speed of discharge of the spinning solution is about 1 m. per minute. If the speed of spinning is increased the temperature of the lips must be correspondingly raised or the heated surface increased so that the heating of the surface of the spinning solution is maintained'at .its previous value. When the speed of the spinning is diminished the conditions are reversed. From the spinning slot the solution issues into a precipitating bath of the usual composition, for
face.
If the temperature of the spinning lips is too high there is the danger that a sheet of poor tensile strength will be produced. When 10 the temperature is too low on the other hand the surface of the sheet is I claim:
liable to be rifled.
' said slot with a precipitating bath.
A process for producing bands of regenerated cellulose with smooth surfaces which comprises leading to a spinning slot 9. highly viscous paste of cellulose dissolved in a solvent selected from the class consisting of sulphuric and phosphoric acids, said paste being at a temperature not exceedinglo" C.,- subjecting the mass adjacent I the slot and onlyat the periphery of the mass to a temperature of from 30 to 300 C. to efiect liquefaction of the mass only at the surface thereof and treating the mass passing through ANTON WUND
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2325574X | 1938-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2325574A true US2325574A (en) | 1943-07-27 |
Family
ID=7994769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US292041A Expired - Lifetime US2325574A (en) | 1938-08-29 | 1939-08-26 | Manufacture of sheets or bands from highly viscous cellulose solutions |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2325574A (en) |
| BE (1) | BE436162A (en) |
| FR (1) | FR859581A (en) |
| NL (1) | NL51642C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2880465A (en) * | 1955-01-15 | 1959-04-07 | Bemberg Ag | Process for the production of cellulosic sheets |
| US3327038A (en) * | 1965-06-24 | 1967-06-20 | Koppers Co Inc | Extrusion die |
| US5985030A (en) * | 1996-02-07 | 1999-11-16 | Gl&V-Paper Machine Group, Inc. | Wet end starch application |
| US5997692A (en) * | 1996-02-07 | 1999-12-07 | Gl&V-Paper Machine Group, Inc. | Profiling wet end starch applicator |
| CN117468173A (en) * | 2023-12-27 | 2024-01-30 | 赛普(杭州)过滤科技有限公司 | Porous ribbon fiber membrane and preparation method and application thereof |
-
0
- BE BE436162D patent/BE436162A/xx unknown
- NL NL51642D patent/NL51642C/xx active
-
1939
- 1939-08-26 US US292041A patent/US2325574A/en not_active Expired - Lifetime
- 1939-08-29 FR FR859581D patent/FR859581A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2880465A (en) * | 1955-01-15 | 1959-04-07 | Bemberg Ag | Process for the production of cellulosic sheets |
| US3327038A (en) * | 1965-06-24 | 1967-06-20 | Koppers Co Inc | Extrusion die |
| US5985030A (en) * | 1996-02-07 | 1999-11-16 | Gl&V-Paper Machine Group, Inc. | Wet end starch application |
| US5997692A (en) * | 1996-02-07 | 1999-12-07 | Gl&V-Paper Machine Group, Inc. | Profiling wet end starch applicator |
| EP0963487A1 (en) * | 1996-02-07 | 1999-12-15 | Jefferson Smurfit Corporation | Wet end starch application |
| EP0963487A4 (en) * | 1996-02-07 | 2000-04-12 | Jefferson Smurfit Corp | Wet end starch application |
| CN117468173A (en) * | 2023-12-27 | 2024-01-30 | 赛普(杭州)过滤科技有限公司 | Porous ribbon fiber membrane and preparation method and application thereof |
| CN117468173B (en) * | 2023-12-27 | 2024-04-05 | 赛普(杭州)过滤科技有限公司 | Porous ribbon fiber membrane and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| NL51642C (en) | |
| FR859581A (en) | 1940-12-21 |
| BE436162A (en) |
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