Patent ID: 8334354

Claim:
Copolymer of ethylene with (C3˜C18) α-olefin comonomer, having a density of 0.900 to 0.910 g/cm 3 , and falling dart impact strength (F) satisfying the correlation with Vicat softening point as expressed by Formulas (1) and (2): F≧ 0.55 ×e (9.3011/(1+((V−59.4592)/76.3517) 2 )) +15 [Formula 1] F≦ 1.7 ×e (9.3011/1+((V−59.4592)/76.3517) 2 )) +200 [Formula 2] wherein, V represents Vicat softening point measured according to ASTM D 1525; and F represents falling dart impact strength measured according to ASTM D1709.