PRODUCTION OF BACTERIA CELLULOSE

摘要

PROBLEM TO BE SOLVED: To obtain the subject substance capable of manifesting an effect of improving yield of filler by culturing a cellulose-producing bacterium in a medium to which water-soluble polysaccharides are added. SOLUTION: This bacteria cellulose(BC) is obtained by culturing a cellulose- producing bacterium (e.g. an acetic acid bacterium such as Acetobacter xylinum subsp. sucrofermentans) in a medium to which water-soluble polysaccharides (e.g. carboxymethyl cellulose or xanthane gum) are added. Preferably, the cellulose-producing bacterium is cultured in an aerated stirring cultivation system. An adding amount of the water-soluble polysaccharide is preferably about 0.01-0.1 wt.% based on the weight of the medium. The BC is used as a filler yield improving agent and a filler-containing paper having excellent opacity and strength is produced by mixing and dispersing the BC with a filler such as talc or clay in water, previously forming aggregates by using a flocculant, adding the resultant aggregates to a paper stock and making the paper stock.