| 摘要 |
<p>Provision of a multilayer structure superior in the alcohol gasoline permeation-preventing property, interlayer adhesiveness, low temperature impact resistance, heat resistance and chemical resistance. A multilayer structure comprising at least two layers of layer A consisting of a polyamide resin composition (a) comprising 30 - 90 mass% of a polyamide resin (X) comprising a dicarboxylic acid unit comprising 50 - 100 mol% of a terephthalic acid unit and/or a naphthalene dicarboxylic acid unit, and a diamine unit comprising 60 - 100 mol% of an aliphatic diamine unit having 9 - 13 carbon atoms, and 70 - 10 mass% of an impact resistance modifier, and layer B consisting of a polyamide resin composition (b) comprising 50 - 95 mass% of a polyamide resin (X') comprising a dicarboxylic acid unit comprising 50 - 100 mol% of a terephthalic acid unit and/or a naphthalene dicarboxylic acid unit, and a diamine unit comprising 60 - 100 mol% of an aliphatic diamine unit having 9 - 13 carbon atoms, and 50 - 5 mass% of an impact resistance modifier, which satisfies Y‰§Y'+5 wherein Y shows a content ratio (mass%) of the impact resistance modifier in layer A and Y' shows a content ratio (mass%) of the impact resistance modifier in layer B.</p> |
