http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-429102-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_798f3caa292684e1560945c2ba4126a8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L1-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L1-08 |
| filingDate | 1933-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1935-05-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-429102-A |
| titleOfInvention | Improvements in the manufacture of artificial filaments, yarns, fabrics and like products |
| abstract | Lignin or an organic derivative thereof is incorporated into artificial filamentary material having a basis of cellulosic substance during or subsequent to its production. The type of lignin insoluble in most organic solvents may be used but preferably a solution of lignin or an organic derivative thereof is added to a spinning solution from which artificial materials are made by the wet or dry process. The formed materials may be treated, preferably while in a swollen condition with a suspension of lignin or its organic derivative, the particle size being preferably ,0005--,003 mm. The proportion of lignin or derivative added is from 1--10 per cent or more of the cellulose derivative. Suitable lignin derivatives are esters, ethers, e.g. acetyl, methyl or benzoyl derivatives. Preferably the added substances are treated to reduce their colouration before use. In examples a 25 per cent solution of cellulose acetate in acetone containg ,5 per cent of lignin or 1 per cent of acetyl lignin is spun at 180--200 metres per minute through orifices ,08 mm. in diameter, or hanks of cellulose acetate yarn are treated for 15--30 minutes in a saturated solution of lignin in 50 per cent aqueous methylated spirit at 80--90 DEG C. In dry spinning processes, the spinning solution and the evaporative atmosphere may contain solvents or non-solvents. The spinning solution may also contain substances such as citric acid as described in Specification 395,694. In wet spinning processes, the coagulating bath may contain solvents, e.g. as described in Specifications 340,324 and 340,325, or the solvents may be p contained in the after-treatment bath as in Specification 340,437 or in the spinning solution as in Specification 340,436. Stretching processes as described in Specifications 371,343, 375,423, 375,424, and 375,425 may be employed. The formed products may be stretched, e.g. as described in Specifications 277,089,323,790, [both in Class 2 (ii)], 370,430, and 371,461 or treated with shrinking agents as in Specification 389,823 or 403,106. They may be saponified partially or completely, e.g. with caustic alkali ammonia, or amines employing if desired the processes of Specifications 125,153, 313,404, 316521, 318,468, [all in Class 2 (ii)], 402,104, or 402,106. They may be dyed or delustred by treatment with hot aqueous media or by incorporation of finely divided substances, and they may be knitted, netted or woven to form fabrics or may be used for compound yarns. |
| priorityDate | 1933-11-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 21.