http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3825448-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_86d07d7a965bfc03d1896a9ca5b0fb29 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01D10-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F11-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F116-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F6-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01D5-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01D1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F6-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01D1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01D5-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F6-14 |
| filingDate | 2019-10-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8a2507cbe5f5f47fe825ddede2381dd1 |
| publicationDate | 2021-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-3825448-A1 |
| titleOfInvention | Preparation method for pva fiber |
| abstract | The invention discloses a preparation method of PVA fiber, which comprises the following steps: step 1, preparing a spinning dope; PVAc (polyvinyl acetate) is used as a raw material, and dissolved with addition of methanol before filtration, and then the spinning dope is obtained; step 2, spinning; the spinning dope is injected into a spinneret, and the ejected fibers are brought into a direct current electrolytic cell, and undergo a series of reactions of alcoholysis, electrolytic catalytic alcoholysis, and the levering of the alcohol; and the solution formulation in the electrolytic coagulation bath comprises alkali, alcohol and water; step 3: acid bath; the fiber passing through the electrolytic cell is placed into an acid solution with pH value of 4.5-7.0 for an acid bath; step 4: through stretching, drying, washing with water, crimping with hot water and packaging, a finished polyvinyl alcohol fiber product is formed. PVAc (polyvinyl acetate) is adopted to replace PVA, in combination with an electrolytic coagulation bath so that the mirabilite is not needed in the coagulation bath, and PVA is obtained by the alcoholysis of PVAc in an electrolytic cell, and the produced PVA fibers present high purity and few impurities. |
| priorityDate | 2019-10-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 115.