http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S6434408-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_129e393582e6bdf4029baf2206522f45 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-36 |
| filingDate | 1987-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3225db48ff8d9a27488ea230d6672cf1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1235bd6f58dc23f727586d186e5521fb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a92693c6e66c3effce30ad329fd15440 |
| publicationDate | 1989-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S6434408-A |
| titleOfInvention | Porous membrane of polytetrafluoroethylene-base resin and production thereof |
| abstract | PURPOSE:To obtain a separation membrane wherein control of a pore diameter is made easy and membrane thickness can be made thin by constituting the membrane of both a permeable layer having many fine pores of specified average pore diameter and a supporting layer having many pores wherein the average pore diameter in the face parallel to the surface of the membrane is specified. CONSTITUTION:A uniform raw liquid is obtained by adding an aq. soln. dissolved with both a fiber formable polymer such as sodium alginate and an additive such as calcium carbonate to an aqueous dispersion in which polytetrafluoroethylene is dispersed in an aqueous medium contg. a surfactant. This raw liquid is extruded through a mouthpiece for hollow yarn together with core liquid consisting of a coagulating liquid such as a calcium chloride aq. soln. and coagulated in the coagulating liquid and washed with water and thereafter heat-treated at the temp. not lower than m.p. of the resin. This molded form is immersed into the mixed liquid of sulfuric acid and nitric acid to remove the fiber formable polymer and the additive and a porous hollow yarn membrane is obtained. Whereby the separation membrane consisting of both a permeable layer having fine many pores of 0.01-2mu average pore diameter and a supporting layer having many pores wherein the average pore diameter in the face parallel to the surface of the membrane is regulated to 2-20mu is obtained. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2019172909-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2009502500-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9108163-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100439412-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2011036743-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02284633-A |
| priorityDate | 1987-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.