| 摘要 |
PROBLEM TO BE SOLVED: To obtain a material for heat-sensitive recording paper, having improved prevention of waste adhesion free from blush of ground, comprising a calcium phosphate-based compound having a petal-like porous structure composed of an inorganic particle as a nucleating material. SOLUTION: This material for a heat-sensitive recording material is a calcium phosphate-based compound having a petal-like porous structure composed of an inorganic particle as a nucleating material, has <=1.67 Ca/P atomic ratio and satisfies 0.1<=dx 1<=20 (μm), 1<=α<=5 (α=d50 /dx 1), 0<=β<=2 [β=(d90 -d10 )/d50 ], 0.01<=dx 2<=1, 95<=ω1<=90 (%), 70<=ω2 <=95 (%), 30<=Sw1 <=400 (m<2> /g) [dx1 is the average particle diameter of particles measured by an electron micrograph; α is a dispersion coefficient; βis sharpness; d50, d90 and d10 are 50% average particle diameter measured by microtrack FRA laser type particle size distribution meter, 90% accumulated total particle diameter of a sieve passing side measured by microtrack FRA laser type particle size distribution meter and 10% accumulated total particle diameter of a sieve passing side measured by microtrack FRA laser type particle size distribution meter, respectively; dx2 is an average pore diameter of particles obtained from a pore distribution measured by mercury penetration method), etc. |
