| 摘要 |
PROBLEM TO BE SOLVED: To form a filter element without heating a porous hydrophobic resin membrane having been subjected to a functionalizing treatment such as conversion to a hydrophilic material; and to provide a structure capable of being degassed with ease. SOLUTION: There are provided: a filtration membrane prepared by subjecting a functionalizing treatment, such as conversion to a hydrophilic material, to a porous hydrophobic resin membrane, except for prescribed both salvage portions in the width direction thereof; a filtration material manufactured by bending a pile of the filtration membrane with a support net for supporting the whole of both surfaces into a pleat form, and sealing the side end portions, to thereby form into an endless cylindrical article; and a filter element manufactured by supporting the filtration material with a porous inside core and a porous outside sleeve, and the resultant article adhering to an end cap with heat. COPYRIGHT: (C)2007,JPO&INPIT
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