Nonwoven fabric for filter and filter for engine

Details Nonwoven fabric for filter and filter for engine Nonwoven fabric for filter and filter for engine

2006-01-31

2006-01-31

Cecil, Terry K. (Department: 1723)

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

C156S148000, C156S282000

Reexamination Certificate

active

06991113

ABSTRACT:
A nonwoven fabric for a filter excellent in cleaning efficiency and trapped matter retention volume is constructed by two or more different kinds of fibrous layers placed one over the other. The nonwoven fabric has an average pore size from 30 μm inclusive to 60 μm inclusive and a total pore area at 0.011 cm2/cm2or more with respect to an entire surface of the nonwoven fabric. The average pore size is calculated according to a bubble point method as defined in ASTM F-316-80 with use of a Coulter Porometer II.

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