ROLLED POLYPROPYLENE AND INJECTION-MOLDED POLYPROPYLENE

摘要

A polypropylene-based calendered or injection-molded article satisfying the requirements of (1) having a tensile modulus TM of 5 MPa or higher and (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (°C) satisfying the formula: TM ≥ 5 x Tm - 450, is less tacky and excellent in flexibility and transparency. Such a polypropylene-based calendered or injection-molded article is produced from a propylene polymer satisfying the requirements of (1) having a component soluble in a 25°C hexane in a content H25 of 0 to 80% by weight; (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (°C) satisfying the formula: ΔH ≥ 6 x (Tm - 140) wherein ΔH is a melting endotherm (J/g); and (3) having an intrinsic viscosity [η] of 1 to 3 dl/g as measured at 135°C in tetralin.