| 摘要 |
The technical problem to be solved by the present invention, with respect to a biaxial stretch blow-molded container formed by layered preforming through injection molding using multiple nozzles, is to create a delamination function comparable to that of a delamination bottle formed by direct blow molding. The primary means in the present invention for solving this problem is a biaxial stretch blow-molded container configured as follows: the container comprises an outer later that forms an outer shell body and an inner layer that is layered detachably onto the inside of the outer layer and that forms a contained body; the inner layer is formed to be thin so that the contained body can be deformed, by reducing interior pressure, in a manner that reduces volume in a deflated form; the outer layer and the inner layer have a layered structure in which they are layered over a range of height extending from a prescribed height position in an opening tube section to the bottom end surface of a gate scar residually formed in the central section of a base surface wall of a base section; the outer layer and the inner layer are detached, and the point of origin of detachment is the layer boundary between the outer layer which is exposed to the outside at the bottom end surface of the gate scar, and the inner layer; and an air inlet hole is formed between the outer layer and the inner layer and is for introducing outside air. |
