Patent ID: 7857938

Claim:
A method for producing a barrier container having a barrier layer which constitutes the inner surface of the container by joining container parts, the method comprising: step (1) that is a step of producing container parts from a thermoplastic resin, the container parts each having an inner surface, step (2) that is a step of applying a coating liquid containing a liquid medium and a polymer component (A) having hydroxyl groups and carboxyl groups with a ratio of the number of the hydroxyl groups to the number of the carboxyl groups within the range of from 30:70 to 95:5 to the inner surface of each of the container parts produced in step (1) and to a joint surface of each of the container parts, the joint surface to be joined to another container part, thereby forming a film containing the polymer component (A) and the liquid medium on the inner surface and the joint surface, step (3) that is a step of joining the container parts having the film containing the polymer component (A) and the liquid medium together by joining one joint surface with another joint surface to form a primary container, and step (4) that is a step of dry heating the primary container to obtain a dry heated container having a barrier layer formed from the film.