| abstract |
This adhesive resin composition comprises: a propylene-based polymer (A); an ethylene-based polymer (B); and a thermoplastic resin (C) containing a copolymer having 60% to 99% by mole of a constituent unit derived from 4-methyl-1-pentene and 1% to 40% by mole of a constituent unit derived from an α-olefin other than 4-methyl-1-pentene and having 2 to 20 carbons, wherein the total amount of the constituent unit derived from the 4-methyl-1-pentene and the constituent unit derived from the α-olefin other than the 4-methyl-1-pentene and having 2 to 20 carbons is 100% by mole, and the melting point Tm measured with a differential scanning calorimeter (DSC) is either 199°C or lower, or not observed substantially. In the adhesive resin composition, of the 100 parts by mass sum total of the components (A), (B), and (C), the content ratio of the component (A) is 45 to 75 parts by mass, the content ratio of the component (B) is 5 to 20 parts by mass, and the content ratio of the component (C) is 15 to 45 parts by mass. This adhesive resin composition is capable of satisfactorily adhering a polymethylpentene resin to a polar resin such as a polyamide resin or an ethylene-vinyl alcohol copolymer resin, and to a polyolefin resin such as a polypropylene resin, and is capable of maintaining satisfactory adhesion between the resins on each side, even after stretching, or the like, has been performed. The layered body of the present invention comprises a polymethylpentene resin layer, and a layer of a polar resin such as a polyamide resin or an ethylene-vinyl alcohol copolymer resin and a polyolefin resin layer such as a polypropylene resin layer, wherein the layers on each side have been satisfactorily adhered, and satisfactory adhesion between the layers on each side is maintained, even after stretching, or the like, has been performed. |