发明名称 |
FILTER MEDIUM AND PROCESS FOR PRODUCTION OF THE SAME |
摘要 |
A filter material comprising a nonwoven fabric which comprises an ultra-fine continuous fiber having a mean fiber diameter of 0.05 to 1.8 µm is prepared by dissolving or eluting a water-soluble thermoplastic resin from a nonwoven fabric or nonwoven web which comprises a conjugate continuous fiber comprising the water-soluble thermoplastic resin and a water-insoluble thermoplastic resin with a hydrophilic solvent and allowing to remain part of the water-soluble thermoplastic resin in the nonwoven fabric or the nonwoven web. In the filter material, the ultra-fine continuous fiber forms a bundle having a mean width of 3 to 100 µm and the nonwoven fabric has an occupancy area ratio of the bundle of the ultra-fine continuous fiber of 1 to 20% in the surface of the nonwoven fabric. The nonwoven fabric also satisfies the following formula: 100 × B / A ‰¥ 5
wherein (B) is a tensile strength (kgf/5cm) in each of a longitudinal direction and a width direction of the nonwoven fabric and (A) is a fabric weight (g/m 2 ).
The filter material has a high dust collection efficiency and a high liquid permeability and is suitable as a filter material for a liquid fuel such as a filter material for a diesel engine fuel.
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申请公布号 |
EP2065081(A1) |
申请公布日期 |
2009.06.03 |
申请号 |
EP20070807373 |
申请日期 |
2007.09.14 |
申请人 |
KURARAY CO., LTD. |
发明人 |
TSUJIMOTO, TAKUYA;HIKASA, MIDORI |
分类号 |
B01D39/16;B01D39/00;D01F8/10;D04H3/00;D04H3/02;D04H3/08;D04H3/10;D04H3/16;D06M11/00;D06M11/05 |
主分类号 |
B01D39/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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