In order to increase impact strength and flexibility of polypropylene, it is blended with thermoplastic elastomers (such as EPDM). Alloy flexibility is inversely related to hardness. When hardness reduces flexibility and impact strength increases. Nirumand Polymer Eng. Co. produces PP/vulcanized EPDM alloys (TPV) in wide range of hardness from 65 shore A to 57 shore D. These products are used as automotive parts and other industrials parts with different hardness such as bumper and sealing .