DENTIFRICE

FIELD: hygiene.SUBSTANCE: invention relates to a dentifrice containing mixed granules obtained by adding unmixed granules containing water-insoluble powdered material (A) and an inorganic binder containing one or two substances selected from the group consisting of sodium silicate and colloidal silica (B) in a dentifrice, followed by stirring the dentifrice at a rate of at least 10 rpm and no more 250 rpm In the mixed granules in the dentifrice, the average value of the ratio of the area of the projection surface of the granules (SA) to the area of a circle, the diameter of which is the largest transverse diameter (DL) of the projection surface (SS), (SA/SS), is at least 0.5 and no more than 0.9 and the collapse strength of the mixed granules is not less than 1 gf/granule and not more than 20 gf/granule. Amount of mixed granules in the dentifrice is not less than 1 wt% and not more than 50 wt%. Unmixed granules, which are added to the dentifrice to obtain mixed granules in the dentifrice, are obtained by a roller granulation method, and among the following unmixed granules (b')-(e-1'), according to the particle size distribution, which is determined by laser diffraction/scattering, granules (b') have a particle size of at least 100 mcm and less than 150 mcm, granules (c') have a particle size of not less than 150 mcm and less than 200 mcm, and granules (d') have a particle size of not less than 200 mcm and less than 250 mcm, and granules (e-1') have a particle size of not less than 250 mcm and less than 300 mcm. Volume ratio of the amount of granules (b') to the amount of granules (c'), (b'/c'), is not less than 0.6 and not more than 1.25, volume ratio of the amount of granules (d') to the amount of granules (c'), (d'/c') is not less than 0.7 and not more than 1.2, and the volume ratio of the amount of granules (e-1') to the amount of granules (c'), (e-1'/c'), is not less than 0.4 and not more than 1.1, and the collapse strength of unmixed granules is not less than 1 gf/granule and not more than 20 gf/granule.EFFECT: disclosed dentifrice demonstrates high efficiency in removing dental plaque or stains even at low pressure, which is applied by a soft toothbrush, since the granules easily penetrate into shallow recesses, such as tooth perikymata, mesiolabial grooves, central ridges and distolabial surface grooves.4 cl, 4 tbl, 10 ex, 3 dwg Изобретение относится к средству для чистки зубов, содержащему смешанные гранулы, полученные добавлением несмешанных гран