Resin Composition and Sheet-Shaped Molded Body Thereof

摘要

A resin composition according to the present invention contains a polypropylene-based resin (a), a hydrogenated block copolymer (b), and a hydrogenated block copolymer (c) in a particular mass ratio, and the hydrogenated block copolymer (b) and the hydrogenated block copolymer (c) have particular constitution. Moreover, a sheet-shaped molded body according to the present invention contains the resin composition according to the present invention. Furthermore, a packaging material for medical use, foodstuffs or clothes according to the present invention contains the sheet-shaped molded body according to the present invention.

主权项

1. A resin composition comprising:
a polypropylene-based resin (a); a hydrogenated block copolymer (b); and a hydrogenated block copolymer (c), wherein the hydrogenated block copolymer (b) comprises:
at least one polymer block A comprising an aromatic vinyl compound unit as a main constituent; andat least one polymer block B comprising a conjugated diene compound unit as a main constituent, a total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (b) is 5 to 30% by mass, 80 mol % or more of all the conjugated diene compound units in the hydrogenated block copolymer (b) is hydrogenated, an amount of vinyl bond of the hydrogenated block copolymer (b) before hydrogenation is more than 60 mol %, the hydrogenated block copolymer (c) comprises:
at least one polymer block C comprising an aromatic vinyl compound unit as a main constituent; andat least one polymer block D comprising a conjugated diene compound unit as a main constituent, a total content of the aromatic vinyl compound unit in the hydrogenated block copolymer (c) is 5 to 30% by mass, 80 mol % or more of all the conjugated diene compound units in the hydrogenated block copolymer (c) is hydrogenated, an amount of vinyl bond of the hydrogenated block copolymer (c) before hydrogenation is 40 to 60 mol %, a mass ratio of a content of the hydrogenated block copolymer (b) to a content of the hydrogenated block copolymer (c), (b)/(c), is 20/80 to 80/20, and a mass ratio of a content of the polypropylene-based resin (a) to the total content of the hydrogenated block copolymer (b) and the hydrogenated block copolymer (c), (a)/((b)+(c)), is 40/60 to 90/10.