Filter medium, filtering device using filter medium, and filter medium manufacturing method
AssigneeIshigaki Company Limited
InventorsKunio Fujita, Hidetaka Ujike, Takahiko Ishimaru, Fumikatsu Nagai
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Abstract
A filter medium includes: a core yarn and a binder yarn twisted together, at least one of the core yarn or the binder yarn being weldable; and a filament yarn being fuzzy and weldable, the filament yarn being welded to at least one of the core yarn or the binder yarn while being placed between the core yarn and the binder yarn as twisted together. A filtering device for filtering a liquid to be treated with a filter medium layer includes the filter medium. A method of manufacturing the filter medium is also disclosed.
Claims6
A filter medium comprising:
- a core yarn and a binder yarn twisted together, at least one of the core yarn or the binder yarn being weldable;
- and
- a filament yarn being fuzzy and weldable, the filament yarn including first short fibers, the first short fibers twisted and raised at ends thereof,
- the filament yarn being welded to at least one of the core yarn or the binder yarn while being placed between the core yarn and the binder yarn as twisted together, wherein
- the at least one of the core yarn or the binder yarn includes second short fibers,
- weldability of the filament yarn is derived from melting of the first short fibers, and
- weldability of the at least one of the core yarn or the binder yarn is derived from melting of the second short fibers, and
- the filament yarn being welded to at least one of the core yarn or the binder yarn comprises the first short fibers of the filament yarn being fused to the second short fibers of the at least one of the core yarn or the binder yarn by melting of the first short fibers and the second short fibers.
A filtering device for filtering a liquid to be treated with a filter medium layer provided in a filtration tank, wherein
- the filter medium layer includes filter media, and
- each of the filter media includes:
- a core yarn and a binder yarn twisted together, at least one of the core yarn or the binder yarn being weldable;
- and
- a filament yarn being fuzzy and weldable, the filament yarn including first short fibers, the first short fibers twisted and raised at ends thereof,
- the filament yarn being welded to at least one of the core yarn or the binder yarn while being placed between the core yarn and the binder yarn as twisted together,
- the at least one of the core yarn or the binder yarn includes second short fibers,
- weldability of the filament yarn is derived from melting of the first short fibers, and
- weldability of the at least one of the core yarn or the binder yarn is derived from melting of the second short fibers, and
- the filament yarn being welded to at least one of the core yarn or the binder yarn comprises the first short fibers of the filament yarn being fused to the second short fibers of the at least one of the core yarn or the binder yarn by melting of the first short fibers and the second short fibers.
Dependencies are inferred from the claim text.