发明名称 |
APPARATUS FOR MANUFACTURING A FINE POROUS FILM FOR A SEPARATION FILM OF A BATTERY AND METHOD FOR MANUFACTURING A FILM USING THE SAME |
摘要 |
The present invention relates to an apparatus and method for manufacturing a fine porous film to be used as a separation film of a secondary battery. The apparatus for manufacturing the fine porous film of the present invention includes: a T-shaped die (20) for molding a precursor film by extruding a molten resin generated by melting a partially crystalline resin through the front end of a nozzle; a guide roller (50) arranged at a downstream side of the extrusion direction of the T-shaped die (20) so as to move and guide the precursor film (F1) at a predetermined draft ratio; a precursor film cooling unit (40) for providing, in the moving direction of the precursor film, a flow of cooling air over either or both of the front and back surfaces of the precursor film so as to cool the precursor film; and a film stretching unit for applying a tensile force, in an axial direction or in biaxial directions, to the cooled film while same is passing through the precursor film cooling means (40). |
申请公布号 |
US2014227604(A1) |
申请公布日期 |
2014.08.14 |
申请号 |
US201214125784 |
申请日期 |
2012.06.08 |
申请人 |
Park Hyun Chae |
发明人 |
Park Hyun Chae |
分类号 |
B29C44/30;H01M2/14;H01M2/16 |
主分类号 |
B29C44/30 |
代理机构 |
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代理人 |
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主权项 |
1. A method for manufacturing a fine porous film, the method comprising:
extrusion-molding a molten material of a semi-crystalline resin through a T-shaped die to mold a precursor film; contacting a cooling gas having a temperature lower than a melting point of the semi-crystalline resin the precursor film to cool the precursor film; and stretching the cooled precursor film at a temperature lower than the melting point of the semi-crystalline resin in one axial direction or biaxial directions to form a fine pore in the precursor film. |
地址 |
Seoul KR |