PREPARATION OF TITANIUM DIOXIDE-CARRYING PAPER

摘要

PURPOSE: To prepare a titanium dioxide-carrying paper with photo-decomposing ability of hazardous substances utilizing photo-catalytic decomposing action of titanium dioxide by coating a specified substrate with an acidic water-contg. titanium dioxide-contg. soln. and coagulating and depositing titanium dioxide thereon. CONSTITUTION: A titanium dioxide-carrying paper prepd. by immersing a substrate with a pH of at least 9 defined by JIS-8133 with an acidic water-contg. titanium oxide exhibits excellent hazardous substance removing ability and furthermore, excellent result where it hardly discolors at a high temp. and high humidity is obtd. In addition, especially when chitosan being a cationic binder is incorporated in parallel with the acidic water-contg. titanium dioxide for immersion, powder fall-out is extremely small and good results both on hazardous substance removing ability and discoloring properties are obtd. In addition, it is possible to decrease highly efficiently hazardous substances such as bad smell in air by irradiating the titanium dioxide-carrying paper with a light beam.