Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1995-01-12
1995-11-21
Withers, James D.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
55522, 55527, 210503, 210505, 428 364, 428283, 428296, 428900, 428903, B01D 3902, B01D 2400, D04H 104, B32B 516
Patent
active
054685290
ABSTRACT:
A magnetic filter material is disclosed. The filter material according to the present invention comprises a spray-spun, self-bonded, nonwoven fibrous structure consisting essentially of 40 to 99% by weight of a polymer selected from the group consisting of polycarbonate, polyethylene, polypropylene, polyamide, polyimide, polyester, polytetrafluoroethylene and polyacrylonitrile and 1 to 60% by weight of a magnetic substance selected from the group consisting of barium ferrite, strontium ferrite and samarium-cobalt.
The magnetic filter material of the present invention shows excellent filtration efficiency of metal impurities such as iron, iron oxides, and other metal dusts due to have a dual function by physical porosity and magnetic attraction, and thus is suitable as an air and oil filter medium for automobiles and other industrial machinery, a liquid filter medium for treating industrial waste water and oil, a filter medium in dust collecting and air-conditioning systems, and so forth.
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patent: 4193866 (1980-03-01), Slusarczuk et al.
patent: 4361619 (1982-11-01), Forsten et al.
Choi Ki Y.
Choi Ung S.
Jung Yoon M.
Kwon Oh K.
Mishkin N. K.
Korea Institute of Science and Technology
Withers James D.
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