Flexstone® Pellet PP Series

Flexstone® Pellet is a material pellet made primarily from calcium carbonate (limestone) compounded with polyolefin-based thermoplastic resin, with inorganic content exceeding 60%. Unlike conventional filled pellets, where calcium carbonate is an additive, limestone is the primary material. It is positioned as an alternative to conventional petroleum-based plastics for toys, packaging containers, art and craft products and daily consumer goods.

The PP series uses polypropylene as the resin matrix: flexural modulus ≥20 MPa, melt flow index 2–3 g/10 min, with higher rigidity, dimensional stability and good heat resistance. The PE series uses polyethylene: flexural modulus ≥10 MPa, melt flow index 5–8 g/10 min, with good flexibility, high impact resistance and excellent low-temperature performance. PP is recommended for toys, crafts and rigid bottles; PE for flexible bottles.

Yes. According to the Flexstone Pellet product brief, it is compatible with injection molding, blow molding, extrusion and thermoforming and can be processed directly on existing equipment. Typical products are toys, crafts and daily goods (injection), packaging bottles and hollow products (blow molding), sheets, pipes and profiles (extrusion), and trays and packaging containers (thermoforming). Stable melt flow supports uniform wall thickness.

According to the Flexstone Pellet product brief, the material reduces petroleum-derived plastic use by approximately 28% and greenhouse gas emissions by approximately 10%. Products can be mechanically recycled as a single material, and scrap and trim can be re-pelletized. Density is about 1.5 g/cm³, higher than pure PP or PE at about 0.9–0.96 g/cm³, so parts feel heavier; where lightweighting matters, optimise the wall thickness.