Molded body, method of manufacturing the same, seat material for vehicles, and method of manufacturing the same

A seat material for vehicles, comprising:

• a main portion molded with a first foam material;
• and
• a bank portion provided on each of both sides of the main portion and molded with a second foam material different from the first foam material,
• wherein the main portion and the bank portion each include an interlocking profile and the main portion and the bank portion are interlocked to each other by means of respective interlocking profiles at a boundary portion between the main and bank portions to prevent mutual separation of the main and bank portions, and
• wherein the main portion includes an upright seat back portion oriented upright and divided into a first member on an upper side of a vehicle and a second member on a lower side of the vehicle, the second member being positioned under the first member, the second member being molded with a foam material different from the first foam material, and the first and second members each include an interlocking profile and the first and second members are interlocked to each other by means of the respective interlocking profiles at a second boundary portion between the first and second members to prevent mutual separation of the members,
• wherein the second boundary portion between the first and second members entirely linearly extends such that an extending direction of the second boundary portion obliquely intersects a thickness direction of the first member and the second member to form an acute angle with respect to the thickness direction of the first member and the second member.