Electretized material for a dust filter
AssigneeToyo Boseki Kabushiki Kaisha
InventorsSusumu Ohmori, Akira Yagi, Satoshi Takase
Life of this patent
Estimating the term…
Abstract
An electretized material for a dust filter which is made of an insulating polymer material such as polypropylene incorporated with a fatty acid metal salt in an amount of not less than 100 ppm in terms of the metal.
Claims14
An electretized material for a filter to be used for elimination of dust from a dust-containing gas comprising a uniform mixture of an insulating polymer and a fatty acid metal salt of aluminum or magnesium.
A method for the manufacture of an electretized material for a filter to be used for elimination of dust from a dust-containing gas which comprises the steps of forming a uniform mixture of an insulating polymer material and a fatty acid metal salt of aluminum or magnesium, and subjecting the mixture to drawing, followed by subjecting the resultant drawn material to friction, thereby imparting permanent dielectric polarization to the material.
A method for the manufacture of an electretized material for a filter to be used for elimination a dust from a dust-containing gas which comprises the steps of forming a uniform mixture of an insulating polymer material and a fatty acid metal salt of aluminum or magnesium, and subjecting the mixture to drawing, followed by subjecting the resultant drawn material to a corona charge treatment, thereby imparting permanent dielectric polarization to the material.
A method for the manufacture of an electretized material for a filter to be used for elimination of dust from a dust-containing gas which comprises the steps of forming a uniform mixture of an insulating polymer material and a fatty acid metal salt of aluminum or magnesium, and subjecting the mixture to drawing, followed by subjecting the resultant drawn material to friction while corona charge treating, thereby imparting permanent dielectric polarization to the material.
Dependencies are inferred from the claim text.