| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b55c349b43c3ecba4977fd52cc8f8c67 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B2307-718
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C55-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C55-005
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2327-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B2262-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B2264-0257
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B2307-7265
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B2307-724 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J5-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B27-322
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0027
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D39-1692
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B5-022
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B27-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0004
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D69-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B5-30 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D39-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D46-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D46-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-00 |
| filingDate |
2012-07-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2015-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_160d2acd4e0f26afb1d15383e04ce1b0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cbb20f269996afccef41073a30bbc3e4 |
| publicationDate |
2015-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CN-103649190-B |
| titleOfInvention |
Method for producing porous polytetrafluoroethylene film |
| abstract |
Provided is a method which comprises: a step A wherein a mixture that contains a fine polytetrafluoroethylene (PTFE) powder having a standard specific gravity (SSG) of 2.19 or less and a liquid lubricant is extruded into a sheet form using a flat die, thereby obtaining a PTFE sheet; a step B wherein the PTFE sheet is rolled along the longitudinal direction by having the PTFE sheet pass between a pair of rolls; a step C wherein the rolled PTFE sheet is stretched in the width direction; a step D wherein the liquid lubricant is removed from the PTFE sheet; and a step E wherein the PTFE sheet, from which the liquid lubricant has been removed, is stretched in the longitudinal direction and in the width direction so that the area drawing ratio is, for example, 150-700 times, thereby making the PTFE sheet porous. This production method is capable of improving the PF value of a porous PTFE film. |
| priorityDate |
2011-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |