Usage： Special for PVC compound, Fillers of Paint、Print ink、Plastic、Rubber、Adhesives、 Pharmacy、Fodder、Paper-making、polyethylene(PE)、polypropylene(PP)、ABS、Building material,etc. Characteristic： 1.Identical grain size 、low oil absorption value. 2.To reduce the cost of products ; to make products have good foamed effect. 3.To enhance hardness、rigidity、size stability 、fire-retardantness、glossiness of products.calcium carbonate is used for high polymer material to improve the craftwork of processing and enhance the mechanics and hot stability of products; It can reduce the cost with the enhancement of dispersibility and compatibility.