Multilayer film and packaging material using same

A multilayer film, comprising:

• a barrier layer (A) containing an ethylene-vinyl alcohol copolymer (a) as a main component, the copolymer (a) having an ethylene unit content from 20 to 50 mol % and a degree of saponification of 90 mol % or more;
• an adhesive layer (B) containing an adhesive resin (b) as a main component;
• a thermoplastic resin layer (C) containing a polyethylene-based resin (c) as a main component, the resin (c) having a density from 0.941 to 0.980 g/cm3;
• and a heat seal layer (D) containing an ethylene-α-olefin copolymer resin (d) as a main component, the resin (d) having a density from 0.880 to 0.920 g/cm3, wherein
• the multilayer film has the barrier layer (A) between at least a pair of the thermoplastic resin layer (C) and the heat seal layer (D)
• and has no layer containing a resin with a melting point of 200° C. or more as a main component and no metal layer with a thickness of 1 μm or more, and
• when a temperature is risen from −50° C. to 220° C. at 10° C./min (first temperature rise) and then lowered to −50° C. at 10° C./min and further risen to 220° C. at 10° C./min (second temperature rise) using a differential scanning calorimeter (DSC), a ratio (H1/H2) of a total heat of fusion (H1) from 0° C. to 150° C. during the first temperature rise to a total heat of fusion (H2) from 0° C. to 150° C. during the second temperature rise is from 0.75 to 1.01.