Welcome to Heritage Plastics – for calcium carbonate concentrates Heritage Plastics, Calcium Carbonate, Calcium Carbonate Concentrates, Minapol, PolyMax, HM10, Hical, StyroCal, PolyCal, HM10MAX, BioTuf, polyolefin applications, compostable film, compostable bags, resin enhancement, plastics additives, reducing carbon footprint of plastics Heritage Plastics manufacturers calcium carbonate concentrates for a variety of plastic resins and applications. Concentrates are designed to improve the performance and productivity and help offset any rising resin costs. Our calcium carbonate concentrates offer proven advantages for minimizing the overall carbon footprint of the finished products versus resin only systems. Our expertise is focused on highly filled mineral based concentrates using our Minapol™ Additive Technology. We lead the way in calcium carbonate concentrates.