Multilayer filter material, process for its manufacture and the

Details Multilayer filter material, process for its manufacture and the Multilayer filter material, process for its manufacture and the

1986-04-16

1987-04-28

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

210505, B01D 3902

Patent

active

046612556

ABSTRACT:
A multilayer filter material is described which comprises a coarse and a fine filter layer, while the individual filter layers contain a share of natural fibres and are interconnected with each other on the paper machine, without the use of a bonding agent, whereby the coarse filter layer consists of a mixture of natural and synthetic fibres and at least one part of said synthetic fibres is structured, and synthetic fibres lying on the surface of the coarse filter layer protrude from the plane of the filter material.
Moreover a process for the manufacture of the multilayer filter material and its use is described.
The inventive multilayer filter material is distinguished against comparable conventional filters by an increased service life and a better degree of separation.

REFERENCES:
patent: 2831748 (1958-04-01), Finlayson et al.
patent: 3073735 (1963-01-01), Till et al.
patent: 3121040 (1964-02-01), Shaw et al.
patent: 3353682 (1967-11-01), Pall et al.

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