| 摘要 |
<p>PURPOSE:To obtain a blow molded vessel whose adhesive strength of a pinch-off part is high and color tone change also is little, by a method wherein a polyamide layer where change in the color tone obtained by bringing a molded product with water for a week is not exceeding a specific value is made into an inside layer. CONSTITUTION:A polyamide composition containing a hindered phenolic antioxidant and/or a phosphorous processing stabilizer at the rate of 0.01-5wt.% in polyamide is used. Then a layer comprised of the polyamide composition where a difference DELTAE between a value of a color tone change in a color tone change test which has performed with a sample obtained by bringing a molded product comprised of the polyamide composition into contact with water for a week and the similar one to the molded product comprised of only polyamide is not exceeding 2.0 is made into an inside layer. With this construction, excellent blow molded vessel where a pinch-off part is superior in adhesive strength and the color tone change at the time of moisture absorption is little is obtained.</p> |
