| 摘要 |
PROBLEM TO BE SOLVED: To provide a molded filter allowing retention of the pleat form of a filter cloth consisting of a woven or nonwoven fabric without resin processing. SOLUTION: The filter cloth 10 is composed of fiber aggregates, e.g., a needle punch nonwoven fabric. It is tubular in the form of pleats. Counter layers 10A and 10B of the filter cloth 10 are sewed together in parts 16 close to the crests and troughs of the pleats. The sewed parts 16 extends practically throughout the length of the pleats, enabling the retention of the pleat form of the filter cloth 10. COPYRIGHT: (C)2009,JPO&INPIT
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