| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluoro-resin porous material having an excellent processing performance and filtering capability by solving a problem that, when employing a method to produce a fluoro-resin porous material where pores are formed by drawing, if the drawing rate is made larger, the porous rate becomes larger, however the pore size becomes larger concurrently, resulting in the deterioration in the filtering performance, consequently the problem arises that the porous material with small pore size and higher filtering performance has a drawback of smaller flaw rate and the porous material with larger pore rate with larger pore size and larger flow rate has a drawback of degraded filtering performance. SOLUTION: Tetrafluoro-ethylene resin fine powder irradiated with a radio-active ray or an extruded material using it, and a heat absorption curve in a differential scanning calorimeter analysis has both of a 347°C absorption peak which is ordinarily shown in tetrafluoro-ethylene resin fine powder and a 335°C absorption peak which is appeared by a radioactive ray irradiation. COPYRIGHT: (C)2009,JPO&INPIT |
