Filtering medium and a process for producing the same

Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums

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Details

210504, 210505, 210508, 264234, B01D 3916

Patent

active

055037453

ABSTRACT:
A filtering medium which is unchanged in the maximum pore size even when heating sterilization, high temperature filtration, etc. are carried out, yet has a high tensile strength, can be processed into pleat-form and also is applied to high precision filtration, is provided, which filtering medium is a product having a non-woven fabric composed of 20 to 80% by weight of lower melting point microfine fibers and 80 to 20% by weight of higher melting point microfine fibers having a melting point higher by 10.degree. C. or higher than that of the lower melting point microfine fibers, the respective fibers being hot-melt-adhered to one another through the lower melting point microfine fibers, hot-melt-adhered to a hot-melt-adhesive net, and having a maximum pore size of 120 .mu.m.

REFERENCES:
patent: 4657804 (1987-04-01), Mays et al.
patent: 4722857 (1988-02-01), Tomioka et al.
patent: 5225014 (1993-07-01), Ogata et al.
patent: 5302447 (1994-04-01), Ogata et al.

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