| 摘要 |
PURPOSE:To obtain a multi-layer vessel superior in also transparency, gas barrier properties, interlaminar adhesion and mechanical strength, by constituting the vessel so that an opening end part of a mouth part of the vessel is comprised of single-layer structure of thermoplastic resin, and a thin part of a belly part is constituted of a single-layer part of the thermoplastic resin and multi-layer part of the thermoplastic resin and the other thermoplastic resin. CONSTITUTION:A multi-layer vessel is manufactured of thermoplastic resin A1 and thermoplastic resin B2. Then in the multi-layer vessel and a parison of its precursor, an end part of an opening of a moth part of the vessel is comprised of single-layer structure of the thermoplastic resin A1, and a thin part of a belly part is constituted of a signal-layer part of the thermoplastic resin A1 ad a multi-layer part of the thermoplastic resin A1 and thermoplastic resin B2. In its manufacture, the thermoplastic resin A1, B2 are injected respectively through their exclusive injection cylinders and finally the thermoplastic resin A1, then simultaneous injection of the thermoplastic resin A1, B2 and single injection of the thermoplastic resin A1 are repeated alternately and the thermoplastic resin A1 is injected finally. |
