Film made from c2c3c4 terpolymer - c3c4 copolymer blend and c2c3c4 terpolymer - c3c4 copolymer blend

A film made from a blend obtainable by compounding an ethylene-propylene-1-butene terpolymer base resin and a propylene butene random copolymer upgrading resin, wherein

• the ethylene-propylene-1-butene terpolymer base resin includes
• a) units derived from ethylene in an amount of 0.1 to 2.0 wt.-% with respect the total ethylene-propylene-1-butene terpolymer base resin;
• and
• b) units derived from propylene in an amount of 88.0 to 95.9 wt.-% with respect the total ethylene-propylene-1-butene terpolymer base resin;
• and
• c) units derived from butene in an amount of 4.0 to 10.0 wt.-% with respect the total ethylene-propylene-1-butene terpolymer base resin,
• d) wherein the units derived from ethylene, propylene and butene add up to 100 wt.-%, and
• e) preferably a total amount of units derived from ethylene and butene of 6.0 to 9.0 wt.-% with respect the total ethylene-propylene-1-butene terpolymer base resin, and
• f) preferably a ratio of the units derived from butene in weight percent versus the units derived from ethylene in weight percent of 3.0 to 16.0, more preferably 3.0 to 8.0;
• wherein the ethylene-propylene-1-butene terpolymer base resin has
• g) 2.1 regioinversions in an amount of 0.10 to 0.80 mol % as determined by 13C-NMR analysis (as described in the experimental part);
• and
• h) a melt flow rate MFR2 (230° C./2.16 kg) measured according to ISO 1133 in the range from 1.0 to 18.0 g/10 min, preferably 1.5 to 7.0 g/10 min, and
• i) a melting temperature Tm measured by differential scanning calorimetry (DSC) in the range from 123 to 142° C., preferably 125 to 135° C.;
• and
• j) preferably a xylene soluble content of 5.0 to 25.0 wt.-% more preferably 15.0 to 19.0 wt. % determined at 25° C.according ISO 16152;
• 2005;
• and wherein the propylene butene random copolymer upgrading resin has
• k) a melting temperature Tm measured by differential scanning calorimetry (DSC) in the range from 70 to 90° C., and
• l) units derived from butene in an amount of 20.0 to 35.0 wt.-% with respect the total propylene butene random copolymer upgrading resin,
• m) wherein the units derived from propylene and butene add up to 100 wt.-%, and
• n) a melt flow rate MFR2 (230° C./2.16 kg) measured according to ISO 1133 of 1.0 to 18.0 g/10 min and preferably higher than the melt flow rate MFR2 (230° C./2.16 kg) of the base resin;
• and
• o) optionally an elongation at break (ASTM D638) of 100 to 900%,
• wherein the film has a sealing initiation temperature (SIT) (as determined by a method described in the experimental part) below 106° C.