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Glossary » Materials » Polymers » Polypropylene » 10 - 40% Calcium Carbonate Filled

10 - 40% Calcium Carbonate Filled PP is a subcategory of Polypropylene. The additative is added by weight during the manufacturing process. Its elastic modulus ranges from 375 to 500 MPa. Its flexural modulus ranges from 230 to 450 MPa. Its tensile strength ranges from 3400 to 4500 MPa at break. Its flexural strength ranges from 5500 to 7000 MPa. Its compressive strength ranges from 3000 to 7200 MPa. Its Izod Impact strength ranges from 0.5 to 1 J/cm. Its elongation at break ranges from 10 to 245 %. Its hardness ranges from 78 to 99 Rockwell R. Its specific gravity ranges from 0.97 to 1.25. Its coefficient of thermal expansion ranges from 28 to 50 x 10^-6/°C. Its molding pressure ranges from 8 to 20 MPa.

Polypropylene, also known as PP, is a thermoplastic, (crystalline), polymer. Common trade names are Marlex HGL and Fortilene 1800 series (FDA materials). homopolymer Its key attributes are high lubricity, high resistance to flexing (excellent material for living hinges), excellent dielectric strength and chemical resistance, good impact strength, and high solvent resistance. It is inexpensive and electroplatable, but it is difficult to paint, print on, or bond to. It will be attacked by fuming nitric acid and degraded by UV and ionizing radiation. PP can be used to make medical syringes, beakers, and parts for auto interiors.