Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
A method for electroimpregnation of paper and non-woven fabrics comprising the steps of: (a) forming a bath of an aqueous solution containing about 1-30% of a material which, in said aqueous solution, exists in an at least partially dissociated state, said material having a specific conductance lower than 0.003 mhos cm -l ; (b) providing said bath with cathode and anode electrodes submerged in the solution; (c) introducing a sheet of paper or non-woven fabric having a predetermined degree of porosity into said bath in contact with the cathode or anode electrode, dependant on the polarity of said material; and (d) applying a predetermined DC voltage to the electrodes so as to cause the ions of said material to impregnate the paper or non-woven fabric when said ions move toward one or the other electrode and deposit within the paper or non-woven fabric as at least partially associated molecules.
Claim 2
Independent Claim
149 words
A method for electroimpregnation of paper and non-woven fabrics comprising the steps of: (a) forming a bath of an aqueous solution containing about 1-30% of a material which, in said aqueous solution, exists in an at least partially dissociated state, said material having a specific conductance lower than 0.003 mhos cm -l ; (b) providing said bath with cathode and anode electrodes submerged in the solution; (c) introducing a sheet of paper or non-woven fabric having a predetermined degree of porosity into said bath in contact with the cathode or anode electrode, dependant on the polarity of said material; and (d) applying a predetermined DC voltage to the electrodes so as to cause the ions of said material to impregnate the paper or non-woven fabric when said ions move toward one or the other electrode and deposit within the paper or non-woven fabric as at least partially associated molecules.
Claim 3
Dependent Claim
39 words
A method as defined in claim 1, wherein said sheet of paper or non-woven fabric has a predetermined moisture content so as to prevent excessive buckling of the sheet of paper or non-woven fabric upon immersion into the solution.
Claim 4
Dependent Claim
33 words
A method as defined in claim 1, wherein said ionic material is a polymer used to improve the clarity, dielectric strength and the moisture absorption resistance characteristics of the paper or non-woven fabric.
Claim 5
Dependent Claim
28 words
A method as defined in claim 3, wherein, after impregnation, the sheet of paper or non-woven fabric is rinsed to remove surface material prior to drying and/or curing.
Claim 6
Dependent Claim
27 words
A method as defined in claim 4, wherein the sheet of paper or non-woven fabric is dried and cured at about 150° C during approximately 15 minutes.
Claim 7
Dependent Claim
19 words
A method as defined in claim 3, wherein said polymeric material is an electroimpregnatable synthetic poly carboxylic acid resin.
Claim 8
Dependent Claim
14 words
A method as defined in claim 1, wherein said ionic material is a size.
Claim 9
Dependent Claim
27 words
A method as defined in claim 7, wherein said size is a starch used to improve the writing and printing qualities of the paper or non-woven fabric.
Claim 10
Dependent Claim
22 words
A method as defined in claim 1, wherein said ionic material is a dye used to colour the paper or non-woven fabric.
Claim 11
Dependent Claim
19 words
A method as defined in claim 6, wherein said polymeric material is an epoxy/ester, alkyd, acrylic or polyester resin.