The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 1995
Filed:
Jan. 12, 1995
Oh K Kwon, Seoul, KR;
Ung S Choi, Seoul, KR;
Ki Y Choi, Kyeongsangbuk, KR;
N K Mishkin, Gomel, BY;
Yoon M Jung, Kyeongsangbuk, KR;
Korea Institute of Science and Technology, Seoul, KR;
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.