Electroimpregnation of paper and non-woven fabrics

Details Electroimpregnation of paper and non-woven fabrics Electroimpregnation of paper and non-woven fabrics

1974-12-13

1978-05-16

Fisher, Richard V.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

162184, 162192, C25D 900

Patent

active

040897656

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.

REFERENCES:
patent: 1672539 (1928-06-01), Novak
patent: 2015865 (1935-10-01), Muller
patent: 2898279 (1959-08-01), Metcalfe et al.
patent: 3434872 (1969-03-01), Ashpole et al.
patent: 3449235 (1969-06-01), Burnel
patent: 3484275 (1969-12-01), Lewicki
patent: 3736276 (1973-05-01), Crowne et al.

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