http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1113704-A3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_132721b781afede2175d04e894580568 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R2307-029 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R7-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G64-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04R7-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04R7-00 |
| filingDate | 2000-12-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9c2e5db1004e398f0567400c69323256 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_79771270dd5e0b083cfabffcb8304f4e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_768776948afb639d55761cf40591b38b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5706deeede133af3e1a0077c818e14d9 |
| publicationDate | 2003-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1113704-A3 |
| titleOfInvention | Diaphragm for a speaker unit |
| abstract | The present invention relates to a speaker unitncomprising a diaphragm comprising a 0.5 to 10mm thicknaromatic polycarbonate with a density of 0.03 to 0.6g/cm 3 ,nand a mechanism for driving the diaphragm. The elasticnmodulus in tension of the aromatic polycarbonate resinnfoam sheet or plate used to form the diaphragm for thenspeaker unit of the present invention is preferably atnleast 1 MPa at temperatures of 25°C, 50°C, 80°C, and 105°C,nthe tanδ of the foam sheet or plate is preferably atnleast 0.02 at a temperature ranging from 25 to 105°Cnduring measurement of the dynamic viscoelasticity innbending tests giving 1 Hz frequency oscillation strain,nand the mean cell diameter of the foam sheet or plate isnpreferably 0.05 to 1mm, with a foaming agent left overncontent of no more than 0.3mol/kg in the foam formingnsaid diaphram. The aromatic polycarbonate resin formingnthe diaphragm in the present invention preferablyncomprises an aromatic polycarbonate resin derived fromnbisphenol, preferably with a viscosity average molecularnweight of 25,000 to 70,000. The percentage of open cellsnin the aromatic polycarbonate resin foam forming thendiaphragm in the present invention is preferably no morenthan 50%. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105637900-A |
| priorityDate | 1999-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.