http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101692034-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P70-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E60-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M50-403 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M50-494 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M50-491 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M50-489 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C55-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J5-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M50-417 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C48-0018 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C67-202 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M10-052 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M2-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M2-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M10-052 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J5-18 |
| filingDate | 2012-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-01-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-01-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-101692034-B1 |
| titleOfInvention | High permeable polyethylene separator, and preparation method thereof |
| abstract | The present invention relates to a polyethylene separator, particularly a polyethylene separator for a lithium secondary battery, and a process for producing the same. The polyethylene separator according to the present invention has a porosity of 50% or more, a ventilation rate of 200 sec / 100cc or less with a thickness of 20 m, and a puncture strength of 20 gm with a thickness of 600 gf or more. The method for preparing a polyethylene separator according to the present invention comprises the steps of: (S1) preparing a mixture by mixing polyethylene with at least one pore-forming agent, (S2) extruding the prepared mixture through an extruder to form a compact (S3) cooling the formed extrudate at a cooling rate of 100 to 250 DEG C / min at a temperature difference of 60 DEG C or less between the melting temperature and the cooling temperature of the extrudate to form an extruded sheet; (S4) (TD) stretching temperature is in the range of 105 to 125 DEG C, (S5) a step of biaxially stretching in the MD direction and the transverse direction (TD), wherein the longitudinal (MD) stretching temperature is from 115 to 135 DEG C, Removing the pore-forming agent from the extruded sheet to form a membrane, and (S6) heat-fixing the formed membrane to form a porous membrane. According to the present invention, it is possible to greatly improve porosity and air permeability while maintaining high temperature stability and mechanical properties of a polyethylene separator, thereby providing a lithium secondary battery with high capacity and high output characteristics. |
| priorityDate | 2012-12-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.