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:
May. 16, 1978
Filed:
Dec. 13, 1974
Michael A Dudley, Beaconsfield, CA;
Canada Wire and Cable Limited, Toronto, CA;
Abstract
A method for electroimpregnation of paper and non-woven fabrics is disclosed. The method comprises the steps of forming an aqueous solution containing about 1-30% of an ionic material having a specific conductance lower than 0.003 mhos cm.sup.-1, in a bath provided with cathode and anode electrodes submerged in the solution, introducing a sheet of paper or non-woven fabric having a predetermined degree of porosity into the bath in contact with the cathode or anode electrode, dependent on the polarity of the ionic material, and applying a predetermined DC voltage to the electrodes so as to cause the ions of such material to impregnate the paper or non-woven fabric when such ions move toward one or the other of the electrodes and deposit within the paper or non-woven fabric as partially or totally associated molecules. The ionic material may advantageously be a polymeric material to improve the clarity, dielectric strength and moisture absorption resistance characteristics of the paper or non-woven fabric. The ionic material may also be a size or a dye for the paper industry.