http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-483404-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_283e7be7af9e30bb8f4981a90b12714f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01D5-247 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01D5-247 |
| filingDate | 1937-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1938-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-483404-A |
| titleOfInvention | Improvements in and relating to the production of a crimped and voluminous textile fibre from viscose |
| abstract | Crimped and voluminous textile fibres, e.g. cellulose wool, are obtained by subjecting coagulated but unfixed viscose filaments, charged with substances capable of being decomposed by acids with evolution of gas, to treatment in an untensioned condition with dilute acids so that they are decomposed slowly but completely with evolution of gas bubbles and with strong shrinkage. The crimped product is, still without tension, washed, after-treated, and dried. The gas-evolving substances, e.g., sulphites, bisulphites, carbonates, and bicarbonates may be added to the viscose, to the spinning bath, or both, or may be applied to the coagulated filaments before they reach the acid fixing bath. In a modification, the unfixed filaments are treated with gaseous carbon dioxide or sulphur dioxide. It is advantageous to acidify the unfixed filaments in the twisted state, and after having been stretched, for example, the filaments may be stretched to 100 per cent of their original length, stapled, and acidified. Again, it is preferable to spin a fresh unripened viscose. In an example, viscose of salt point 10 is spun into a solution containing ammonium sulphite, sodium sulphite and sulphurous acid, and the filaments stretched and formed into skeins. The skeins are then immersed without tension in a bath of sulphuric acid. In another example, freshly spun viscose filaments are stretched, cut, and introduced into a bath containing sodium bicarbonate. The fibres are afterwards introduced into sulphuric acid. In a further example, viscose filaments are spun into a bath containing sodium bisulphite and ammonium sulphite, stretched, cut, and introduced into a bath containing sulphuric acid. |
| priorityDate | 1936-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.