MULTI-LAYER PREFORM AND MULTI-LAYER BOTTLE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a multi-layer preform effectively using a resin low in molecular weight for forming a bottle without substantially deteriorating the mechanical properties, impact resistance, and appearance of the bottle. SOLUTION: In the multi-layer preform, a resin whose molecular weight is smaller than that of an inner and outer layer resin in an amount of 10-80 wt.% of the total is incorporated in the inner and outer layer resin as an intermediate layer, and no gate is provided in the bottom.