| 发明名称 | PTFE membrane | ||
| 摘要 | A method for improving the dimensional stability of PTFE membranes by the application of elevated temperature and elevated pressure to a PTFE membrane. The process reduces and/or eliminates the relaxation stress normally associated with PTFE membranes made using previously existing methods. | ||
| 申请公布号 | US9409132(B2) | 申请公布日期 | 2016.08.09 |
| 申请号 | US201012906356 | 申请日期 | 2010.10.18 |
| 申请人 | Donaldson Company, Inc. | 发明人 | Brandimarte Richard;Patel Kirit |
| 分类号 | B29C67/20;B29C43/02;B01D71/36;B01D67/00;B01D69/02;B29C43/22;B29C71/02;C08J5/22;B29C43/46;B29K27/18;B29L31/00 | 主分类号 | B29C67/20 |
| 代理机构 | Pauly, DeVries Smith & Deffner LLC | 代理人 | Pauly, DeVries Smith & Deffner LLC |
| 主权项 | 1. A method of affecting the dimensional stability of a porous PTFE membrane, comprising: a) subjecting a porous PTFE membrane to an elevated temperature above the melting point of the PTFE membrane for a given exposure time, wherein the membrane is heated to an elevated temperature using a roller; and b) simultaneously subjecting the PTFE membrane to compression between two surfaces for the given exposure time, wherein the membrane is compressed under a pressure of at least 1 pound per square inch; wherein the PTFE membrane after being subjected to the elevated temperature and compression remains porous and has a Coulter Porometer of at least 0.1 MFP. | ||
| 地址 | Minneapolis MN US | ||