Multilayer vessel, and application thereof

A multilayer article comprising:

• a layer (X) that contains at least one type of polyolefin resin as a major ingredient, and
• a layer (Y) that contains a polyamide resin (A) as a major ingredient,
• the polyamide resin (A) being composed of a structural unit derived from diamine, and a structural unit derived from dicarboxylic acid,
• 70 mol % or more of the structural unit derived from diamine being derived from metaxylylenediamine, and
• 30 to 60 mol % of the structural unit derived from dicarboxylic acid being derived from straight chain aliphatic α,ω-dicarboxylic acid having 4 to 20 carbon atoms, and 70 to 40 mol % being derived from isophthalic acid,
• wherein the layer (X) contains at least one of cycloolefin-based polymer (B) as the major ingredient,
• the cycloolefin-based polymer (B) has a glass transition temperature of 50 to 170° C.,
• the polyamide resin (A) has a glass transition temperature of 100 to 160° C.,
• the cycloolefin-based polymer (B) shows a melt viscosity of 100 to 250 Pa sec at one or more temperatures between 260 and 300° C., under a shear rate of 1216 sec−1, and
• the polyamide resin (A) shows a melt viscosity of 200 to 400 Pa sec at 270° C., under a shear rate 1216 sec−1.