Flexible heat-sterilizable non-PVC multilayer film for medical packagings

A heat-sterilizable multilayer film comprising

• a) a first polymer layer (A) containing at least one propylene homopolymer modified with at least one impact modifier;
• b) a second polymer layer (B) containing:
• B1) 60% to 85% by weight, based on (B), of a homogeneous composition (B1) consisting of:
• B11) 65% to 85% by weight, based on (B1), of ethylene homopolymer, and
• B12) 15% to 35% by weight, based on (B1), of at least one ethylene copolymer which contains as comonomer at least one alpha-olefin having 4 to 12 carbon atoms,
• where (B1) has a melting temperature (determined by Differential Scanning calorimetry (DSC)) of >125° C. and a density (in accordance with DIN EN ISO 1183-1 (2019-09)—Method B) of 945 to 960 kg/m3;
• B2) 11% to 30% by weight, based on (B), of at least one propylene terpolymer;
• and
• B3) 4% to 15% by weight, based on (B), of at least one polyethylene elastomer which is a copolymer of ethylene with at least one alpha-olefin having 4 to 12 carbon atoms;
• and
• c) a central polymer layer (C) situated between the first polymer layer (A) and the second polymer layer (B), containing:
• C1) 61% to 80% by weight, based on (C), of at least one propylene terpolymer;
• C2) 15% to 25% by weight, based on (C), of at least one styrene block copolymer elastomer;
• and
• C3) 5% to 19% by weight, based on (C), of at least one polyethylene elastomer which is a copolymer of ethylene with at least one alpha-olefin containing 4 to 12 carbon atoms.