http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1071369-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2327-18 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L1-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L27-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-12 |
| filingDate | 1975-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1980-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7089a57831048661193919ddc3ce919d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_89e2ab67503affb6b15141911e19d109 |
| publicationDate | 1980-02-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1071369-A |
| titleOfInvention | Polytetrafluoroethylene molding powder |
| abstract | POLYTETRAFLUORETHYLENE MOLDING POWER Abstract of the Disclosure Finely divided polytetrafluoroethylene molding powder is disclosed having a remarkable comination of high apparent density and high moldability, the latter being re-flected as a small difference inspecific gravity (.DELTA.SG) of standard moldings molded at high and low preform pressures. For example, moldings powders having an average particle diam-eter(d50) of no greater than 60, a .DELTA.SG5-1 of no greater than 30 and apparent density of at least 600 g/l are disclosed. These molding powders are obtained from unique process steps involving either the fine powder type of polytetrafluoro-ethylene of the granular type of polytetrafluoroethylene as the starting material. The fine powder type is compacted to a high degree, followed by partially decompacting the resul-tant compacted fine powder to the molding powder particle size desired. When the granular type is the starting material, this is comminuted to the molding powder particle size desired, followed by seperating the molding powdrer into hard and soft material fractions, followed by re-grinding teh relatively coarse, hard fraction by itself to an average particle size of at least as samall as the original combined fractions. The resuslant molding powder is useful in the manner of previous polytetrafluoethylene molding powders with the advantage of requiring reduced mold height andmolding pres-sure toacheive equivalent quality moldings. |
| priorityDate | 1974-06-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.