发明名称 |
Process for producing a filter component, electrospinning process for producing a nanofibrous nonwoven, and process for increasing the cohesion of a nanofibrous nonwoven |
摘要 |
<p>Producing filter component comprising a substrate and a nano nonwoven fabric of an aromatic polyimide, comprises: (a) preparing the nano nonwoven fabric from a solution with an electrospinning process; and (b) applying and fixing the nanofibers on the substrate prepared in the step (a). Independent claims are also included for: (1) the electrospinning process for producing the nano nonwoven fabric comprising (i) producing the solution of polyimide in a polar, aprotic solvent with a content of 5-25 mass-%, (ii) adding optionally a surfactant of 15 mass/thousand and 0.01 mass/thousand, and (iii) subjecting the solution to an electric field with the field strength of 1000-4000 V/cm; (2) the nanofibers obtained by the above method; (3) increasing the cohesion of the nano-nonwoven fabric by thermal processing at 280-350[deg] C for 1-30 minutes; (4) the nano nonwoven fabric with increased cohesion obtained by the method; (5) the substrate made of polyimide materials, aramid, glass fiber, polytetrafluoroethylene and/or polyphenylene sulfide; and (6) the filter component molded to textile molded parts; and (7) the electrospinnable solution of a polymer in the aprotic polar solvent, comprising (c) polyimide (10-20 mass-%), and (d) optionally surfactant (0.75-12 mass/thousand).</p> |
申请公布号 |
EP2433696(A3) |
申请公布日期 |
2012.04.04 |
申请号 |
EP20110151206 |
申请日期 |
2011.01.18 |
申请人 |
EVONIK FIBRES GMBH |
发明人 |
PEDERSEN, ANDREAS;SCHULTHEIS, FRIEDEL;GRIESSER, HERBERT;UNGERANK, MARKUS |
分类号 |
B01D39/16;B32B5/26;D01D5/00;D01F6/74;D04H1/4326;D04H1/54;D04H1/728;D04H3/009;D04H3/016 |
主分类号 |
B01D39/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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