发明名称 |
Holow-Fiber Porous Water Filtration Membrane of Vinyldene Fluoride Resin and Process for Producing the Same |
摘要 |
A hollow fiber-form porous membrane of vinylidene fluoride resin having a high crystallinity as represented by a crystal melting enthalpy of at least 58 J/g is produced by forming a composition of a vinylidene fluoride resin having a relatively high weight-average molecular weight of at least 3x10<SUP>5 </SUP>blended with a plasticizer and a good solvent for vinylidene fluoride resin, melt-extruding the composition into a hollow fiber-form film, and solidifying the film by cooling it from an outside thereof by contact with a cooling liquid inert to vinylidene fluoride resin while crystallizing the vinylidene fluoride resin at an appropriately moderate speed. The resultant hollow fiber-form porous membrane is excellent in mechanical strength represented by tensile strength and elongation at break, and also excellent in chemical resistance, thus being effectively used as a water micro-filtration membrane.
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申请公布号 |
US2007215540(A1) |
申请公布日期 |
2007.09.20 |
申请号 |
US20050629350 |
申请日期 |
2005.06.08 |
申请人 |
TADA YASUHIRO;TAKAHASHI TAKEO;HINO MASAYUKI;TANIGUCHI SHINGO;SUZUKI KENICHI;MIZUNO TOSHIYA |
发明人 |
TADA YASUHIRO;TAKAHASHI TAKEO;HINO MASAYUKI;TANIGUCHI SHINGO;SUZUKI KENICHI;MIZUNO TOSHIYA |
分类号 |
B01D71/34;B01D67/00;B01D69/02;B01D69/08;C08J9/26;D01F1/02 |
主分类号 |
B01D71/34 |
代理机构 |
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