PROBLEM TO BE SOLVED: To provide granules for toothpaste which: exhibit a behavior where it stepwisely collapses as a weight is loaded and enhances removing property for plaque or stain and usability.SOLUTION: The granules for toothpaste contain a water soluble inorganic binding agent comprising (A) a water insoluble powder material and (B) sodium silicate. By elevating down an indenter at a constant speed with a microcompression testing machine, the compressive load F is increased from 0 gf to a collapse load Fmax at which the granules collapse. When relationship between the compression displacement rate x and the compressive load F is determined, the granules for toothpaste have the following property: there are one or more smooth displacement regions P in which values of a ratio delta F/delta x (ratio of a change amount delta F in the compressive load F relative to a change amount delta x in the compression displacement rate x) are continuously within a range from 0 or more to 0.35 or less the value of delta F/delta x is 6.0 or less until the value of delta F/delta x reaches the initial smooth displacement regions P and the collapse load Fmax is 30 gf or less.COPYRIGHT: (C)2014,JPO&INPIT【課題】荷重を負荷していくにつれて段階的に崩壊する挙動を示し、歯垢又は汚れ除去能や使用感を高めることができる歯磨剤用顆粒を提供する。【解決手段】(A)水不溶性粉末材料、及び(B)珪酸ナトリウムを含む水溶性無機結合剤を含有する歯磨剤用顆粒であって、微小圧縮試験機を用いて圧子を一定速度で降下させることにより、圧縮荷重Fを0gfから顆粒が崩壊する崩壊荷重Fmaxまで負荷し、圧縮変位率xと圧縮荷重Fとの関係を求めたときに、圧縮変位率xの変化量Δxに対する圧縮荷重Fの変化量ΔFの比率(ΔF/Δx)の値が連続して0以上0.35以下である平滑変位領域Pが1個以上存在し、最初の平滑変位領域Pに到達するまでのΔF/Δxの値が6.0以下であり、かつ崩壊荷重Fmaxが30gf以下である歯磨剤用顆粒。【選択図】図2
