A resin propylene based composition useful for the preparation of heat shrinkable films, e.g. for use in packaging, comprises two different propylene based polymers fulfilling specific conditions

摘要

A propylene based resin composition comprises propylene based polymers A and B, having specific melting points TmA and TmB respectively, and melt indices MFRA and MFRB respectively. The amounts of A and B total 100 pts.wt. A propylene based resin composition containing propylene based polymers A and B, where the sum of the amounts of A and B is 100 parts by weight. The melting points of A and B, TmA and TmB, respectively, fulfill condition (C). The melt indices of A and B, MFRA and MFRB, fulfill condition (D). The composition fulfills conditions (E-1) and (E-2). (A-1) MFRA = 0.3-20 g/10 minutes; (A-2) TmA = has as temperature peak of maximum intensity, as defined by a DSC melt plot of 125-140 degreesC; (B-1) MFRB = 21-200 g/10 minutes; (B-2) TmB = a peak temperature as the reaction temperature, with a peak of maximum intensity as defined by a DSC melt plot of 135-170 degreesC; (C) The ratio of TmA to TmB is below 1; (D) The ratio of MFRA to MFRB 9 = 0.01 less than MFRA/MFRB less than 1 (sic.); (E-1) The melt index MFRC of the resin composition = 0.3-20 g/10 minutes; and (E-2) The melting point TmC of the peak as reaction temperature with a peak of maximum intensity as defined by a DSC melt plot is 130-145 degreesC. An Independent claim is included for a heat shrinkable film obtained by at least uniaxial stretching of the resin composition.