Method of producing non-woven fabrics for use in filters

Details Method of producing non-woven fabrics for use in filters Method of producing non-woven fabrics for use in filters

1995-09-11

1997-06-10

Raimund, Christopher

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Dividing work to form plural articles

264175, B29C 3700

Patent

active

056372710

ABSTRACT:
A non-woven fabric for filtering medium having graded packing density. The packing density is the lowest at one surface, and gradually increases towards the other surface at which the packing density becomes the greatest. The gradually increasing packing density and the nearly constant increasing rate of the packing density of the non-woven fabric provide a good filtering efficiency and elongate the life time of a filter.

REFERENCES:
patent: 4342805 (1982-08-01), McCartney
patent: 4731135 (1988-03-01), Tani et al.

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