PROPYLENE POLYMER, MOLDED OBJECT THEREOF

摘要

The propylene polymer of the invention is transparent and has good low-temperature heat-sealability and scratch resistance, and is favorable to wrapping and packaging films. (1) The polymer has a melting point, Tm ( DEG C), measured through differential scanning calorimetry, of 110≤Tm≤140; (2) its heat of fusion INCREMENT H (J/g) and melting point Tm ( DEG C) satisfy DELTA H≥0.45 x Tm + 22; (3) the half-value width Th ( DEG C) of the peak top of its elution curve obtained in programmed-temperature fractionation is Th≤5; and (4) its intrinsic viscosity Ä eta Ü (dl/g) measured in a solvent of tetralin at 135 DEG C falls between 0.5 and 5.