| 摘要 |
<p>A multilayer thin wall container (1) comprising a shell part (2) and a cap mounting opening neck part (3) and formed integrally by a parison extrusion blow molding, wherein an outer layer (A) of high rigid resin with an elastic modulus of 2000 to 23000 kg/cm2 and an inner layer (B) of low rigid resin with an elastic modulus of 1000 kg/cm2 or below are included and, during the parison extrusion molding, the rigidity of the opening neck part (3) is set higher than that of the shell part (2) by increasing the amount of extrusion of the high rigid resin to an area corresponding to the opening neck part (3) in comparison with that to an area corresponding to the shell part (2) and, in addition, a plurality of ribs (21) of the high rigid resin are provided on the shell part (2) along its axis by extruding the high rigid resin in such a section form that a plurality of projections are arranged in circumferential direction in the high rigid resin outer layer (A).</p> |
