GB648395A - Improvements in or relating to fibrous filter media - Google Patents
Improvements in or relating to fibrous filter mediaInfo
- Publication number
- GB648395A GB648395A GB2584847A GB2584847A GB648395A GB 648395 A GB648395 A GB 648395A GB 2584847 A GB2584847 A GB 2584847A GB 2584847 A GB2584847 A GB 2584847A GB 648395 A GB648395 A GB 648395A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fibres
- cellulose acetate
- adhesive
- sheet
- solution
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
Abstract
Filter media, suitable for filtering spinning solutions for the production of artificial filaments, are produced by impregnating a felted sheet of fibres with a solution of an adhesive which under the conditions employed in the making of the filter medium undergoes no substantial degree of chemical change, compressing the impregnated sheet of fibres and depositing the adhesive from the solution while the sheet of fibres is in the compressed state. For example, a felted sheet of cotton fibres may be impregnated with an aqueous solution of a water-soluble methyl cellulose and then compressed and the water evaporated. Fibres of regenerated cellulose, cellulose acetate, a cellulose ester or ether, a polyvinyl compound, a polyamide, or other linear high polymer may be used, provided they are not attacked or dissolved by the liquid to be filtered. The adhesive should also be resistant to the liquid to be filtered, and may comprise a cellulose acetate of moderate or fairly low acetyl value, for example 53-55 per cent, calculated as acetic acid. The adhesive may be removable by the material being filtered. For example, in assembling jets for spinning cellulose acetate filaments the filter for insertion behind the jet orifices may be cotton fibres impregnated with a 1-4 per cent solution of cellulose acetate in acetone and the acetone removed by evaporation. The resulting filter medium can be manipulated without the separation of loose fibres, even though the cellulose acetate is subsequently washed out.ALSO:Filter media are produced by impregnating a felted sheet of fibres with a solution of an adhesive which under the conditions employed in making the filter medium undergoes no substantial degree of chemical change, compressing the impregnated sheet of fibres, and depositing the adhesive from the solution while the sheet of fibres is in the compressed state. For example, a felted sheet of fibres, most or all of which exceed about 5/8 inch in length, the sheet being of initial thickness about 1/2 inch, may be impregnated with an aqueous solution of a water-soluble methyl cellulose and then compressed to a thickness of 1/10 inch or 1/25 inch and the water evaporated. The solution concentration may be 1 to 5 per cent or more. Fibres of regenerated cellulose, cellulose acetate, a cellulose ester or ether, a polyvinyl compound, a polyamide, or other linear high polymer may be used, provided they are not attacked or dissolved by the liquid to be filtered. The adhesive should also be resistant to the liquid to be filtered, and may comprise a cellulose acetate of moderate or fairly low acetyl value, for example, 53-55 per cent calculated as acetic acid. The adhesive may be removable by the material being filtered. For example, in assembling jets for spinning cellulose acetate filament, the filter for insertion behind the jet orifices may be cotton fibres impregnated with a 1-4 per cent solution of cellulose acetate in acetone and the acetone removed by evaporation. The resulting filter medium can be manipulated without the separation of loose fibres, even though the cellulose acetate is subsequently washed out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2584847A GB648395A (en) | 1947-09-23 | 1947-09-23 | Improvements in or relating to fibrous filter media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2584847A GB648395A (en) | 1947-09-23 | 1947-09-23 | Improvements in or relating to fibrous filter media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB648395A true GB648395A (en) | 1951-01-03 |
Family
ID=10234323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2584847A Expired GB648395A (en) | 1947-09-23 | 1947-09-23 | Improvements in or relating to fibrous filter media |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB648395A (en) |
-
1947
- 1947-09-23 GB GB2584847A patent/GB648395A/en not_active Expired
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