PURPOSE: To obtain titanium paper having improved wet strength and yield of titanium dioxide without lowering shielding efficiency by adding a wet paper strength improver to a pulp slurry, dropping a zeta potential by an inorganic electrolyte once before adding aluminum sulfate.
CONSTITUTION: A pulp slurry is mixed with a polyamidoepichlorohydrin-based wet paper strength improver and then blended with an inorganic electrolyte such as sodium aluminate to drop a zeta potential. The pulp slurry is successively blended with titanium dioxide and aluminum sulfate to prepare a raw material pulp slurry. Then the pulp slurry is diluted to adjust the pulp concentration of the pulp slurry. The pulp slurry is made into paper to give the objective titanium paper.
SHIBUYA MASAHIKO
KANDA HIDETOSHI
