| abstract |
Provided is a calcium carbonate filler for resins that has uniform particles, high dispersibility and thermal stability, and, in particular, excellent smoothness, peelability, resistance to detachment, and the like and is useful as an antiblocking material. The calcium carbonate filler for resins includes calcium carbonate particles and satisfies formulae (a) to (e) below: (a) 1.0≤Sw≤12.0 (m2/g); (b) 0.1≤Dx≤5.0 (μm); (c) 0.1≤Dy≤5.0 (μm); (d) 0.8≤Dy/Dx≤3.5; and (e) 0.1≤Tw≤0.8 (% by weight), where Sw is a BET specific surface area (m2/g); Dx is a primary particle diameter (μm) expressed as a calculation formula: Dx=6/(2.7·Sw); Dy is a 50% diameter (μm); and Tw is a thermal weight loss (% by weight) between 100 and 300° C. |