Technical Data Sheet Harkness Industries MP 850 Polyurethane Composition MP 850 is a high performance polyester based urethane. This polyurethane is fom1ulated to give an excellent balance of properties for a wide variety of applications including springs bushings scraper blades die cutting pads bumpers chute liners wheels tires and many more. Physical Properties Shore A Hardness ........................................... 85 - 5 LOO Modulus psi Mpa .................................... 600 4.2 300 Modulus psi Mpa ......... ..... ................ .. 1500 l0.4 Tensile psi Mpa .......................................... 6000 41.4 Elongation . 500 Tear Strengtb Split ASTM D-470 pli kNm ....... 110 19.5 Tear Strengrh Die C ASTM D-624 pli kNm ..... 400 70.8 Bashore Rebound.. ..... .............................. . 28 Compression Set ........... ......... 25 22 hours I 58F 70 C Metlod B Bell Brittle Point F 0C ................................ ... - 70 -57 Specific Gravity................................................. 1.26
