Air cleaning filter
AssigneeMinebea Co., Ltd.
InventorsKazuo Hokkirigawa, Motoharu Akiyama, Noriyuki Yoshimura
Life of this patent
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Abstract
There is provided an air cleaning filter capable of molding into free shapes in which an RB ceramics and/or CRB ceramics of 10 to 2,000 angstrom in pore diameter and 0.1 to 1.1 cm8/g in pore volume is used as an absorbing and filtering material.
Claims11
An air cleaning device comprising a filter medium for separating a contaminant from air, said filter medium comprising an air filter made from at least one of an RB ceramic and a CRB ceramic and having a pore diameter of from 10 to 2,000 angstrom units and a pore volume of 0.1 to 1.1 cm3/g, the RB ceramic being formed from a carbonaceous material obtained by mixing a degreased bran derived from rice bran with a thermosetting resin to form a first mixture, kneading the first mixture, pressure forming the kneaded first mixture to form a compact of the first mixture, drying the compact of the first mixture and baking the dried compact of the first mixture in an inert gas atmosphere at a temperature in a range of 700 to 1000° C. and the CRB ceramic being formed by mixing a powder of the carbonaceous material with a thermosetting resin to form a second mixture, kneading the second mixture, pressure forming the kneaded second mixture at a pressure in a range of from 20 to 30 MPa to form a compact of the kneaded second mixture and baking the compact of the second mixture in an inert gas atmosphere at a temperature in a range of 500 to 1100° C.
An air cleaning device comprising a filter medium for separating a contaminant from air, said filter medium comprising an air filter being made from at least one of an RB ceramic and a CRB ceramic fine powder supported on a non-woven fabric or felt and having a pore diameter of from 10 to 2,000 angstrom units and a pore volume of 0.1 to 1.1 cm3/g, the RB ceramic being formed from a carbonaceous material obtained by mixing a degreased bran derived from rice bran with a thermosetting resin to form a first mixture, kneading the first mixture, pressure forming the kneaded first mixture to form a compact of the first mixture, drying the compact of the first mixture and baking the dried compact of the first mixture in an inert gas atmosphere at a temperature in a range of 700 to 1000° C. and the CRB ceramic being formed by mixing a powder of the carbonaceous material with a thermosetting resin to form a second mixture, kneading the second mixture, pressure forming the kneaded second mixture at a pressure in a range of from 20 to 30 MPa to form a compact of the kneaded second mixture and baking the compact of the second mixture in an inert gas atmosphere at a temperature in a range of 500 to 1100° C.
A dust-proof mask comprising a filter medium for separating a contaminant from air, said filter medium comprising an air filter being made from at least one of an RB ceramic and a CRB ceramic fine powder supported on a non-woven fabric or felt and having a pore diameter of from 10 to 2,000 angstrom units and a pore volume of 0.1 to 1.1 cm3/g, the RB ceramic being formed from a carbonaceous material obtained by mixing a degreased bran derived from rice bran with a thermosetting resin to form a first mixture, kneading the first mixture, pressure forming the kneaded first mixture to form a compact of the first mixture, drying the compact of the first mixture and baking the dried compact of the first mixture in an inert gas atmosphere at a temperature in a range of 700 to 1000° C. and the CRB ceramic being formed by mixing a powder of the carbonaceous material with a thermosetting resin to form a second mixture, kneading the second mixture, pressure forming the kneaded second mixture at a pressure in a range of from 20 to 30 MPa to form a compact of the kneaded second mixture and baking the compact of the second mixture in an inert gas atmosphere at a temperature in a range of 500 to 1100° C.
Dependencies are inferred from the claim text.