Filter medium, fluid filter, and engine oil filter
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United States of America Patent
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Aug 2, 2011
Grant Date -
Dec 25, 2008
app pub date -
Jun 9, 2008
filing date -
Jun 20, 2007
priority date (Note) -
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Abstract
A filter medium comprises a modified cross-section fiber (A) having a fiber diameter between 40 and 70 μm, an extremely fine fiber (B) having a fiber diameter of more than 5 μm and no more than 10 μm and a modified cross-section fiber (C) having a fiber diameter between 15 and 30 μm, the content of the extremely fine fiber (B) is between 3 and 10% by mass, and the content of the modified cross-section fiber (C) is between 5 and 15% by mass based on 100% by mass of total the fibers in the filter medium.
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