| 摘要 |
<p>PURPOSE:To improve the drawdown resistance of a parison and to shorten a molding cycle by forming a polymaide layer from a copolymer of polyamide 6 and polyamide 66. CONSTITUTION:A multilayer plastic fuel tank is formed by laminating a high density polyethylene layer and a polyamide layer through a high density polyethylene layer modified with unsaturated carboxylic acid or a derivative thereof. Herein, the polyamide layer is composed of co-polyamide of polyamide 6 and polyamide 66 and the content of the repeating unit constituting polyamide 6 in co-polyamide is 60 - 90 wt.%, pref., 70 - 80 wt.% and the content of the repeating unit constituting polyamide 56 is 40 - 10 wt.%, pref., 30 - 20 wt.%.</p> |
