Patent ID: 11872788
Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A multilayered article comprising a layer containing a polyester resin as a main component and a layer containing a polyamide resin as a main component, the layer containing the polyester resin as a main component being in direct contact with the layer containing the polyamide resin as a main component,
the polyester resin including a structural unit derived from a dicarboxylic acid and a structural unit derived from a diol in which at least 80 mol % of the structural unit derived from a dicarboxylic acid is derived from at least one type selected from terephthalic acid and esters thereof, and at least 80 mol % of the structural unit derived from a diol is derived from ethylene glycol;
the polyamide resin included in the layer containing a polyamide resin as a main component comprising:
a polyamide resin (A) including a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, 70 mol % or more of the structural unit derived from a diamine being derived from xylylenediamine, and more than 90 mol % of the structural unit derived from a dicarboxylic acid being derived from adipic acid; and
a polyamide resin (B) including a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, 70 mol % or more of the structural unit derived from a diamine being derived from xylylenediamine, and of the structural unit derived from a dicarboxylic acid, from 40 to 60 mol % being derived from an α,ω-linear aliphatic dicarboxylic acid having from 4 to 20 carbons, and from 60 to 40 mol % being derived from isophthalic acid, a total of which does not exceed 100 mol %;
the polyamide resin included in the layer containing a polyamide resin as a main component comprising or not comprising:
a polyamide resin (C) including a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, 70 mol % or more of the structural unit derived from a diamine being derived from hexamethylenediamine, 55 mol % or more of the structural unit derived from a dicarboxylic acid being derived from isophthalic acid, and 15 mol % or more of the structural unit derived from a dicarboxylic acid being derived from terephthalic acid; and
the polyamide resin included in the layer containing a polyamide resin as a main component comprising:
an aliphatic polyamide resin (D),
wherein in the layer containing a polyamide resin as a main component, a ratio of a mass of the polyamide resin (A) to a total mass of the polyamide resin (B) and the polyamide resin (C) is from 98:2 to 15:85 and a mass ratio of the polyamide resin (A) to a mass of the polyamide resin (B) is from 55/15 to 15/55; and
a total content of the polyamide resin (A) and the polyamide resin (B) is not less than 60 mass % of the layer containing a polyamide resin as a main component, a content of the polyamide resin (B) is from 1 to 65 mass % of the layer containing a polyamide resin as a main component, and a content of the aliphatic polyamide resin (D) is from 3 to 40 mass % of the layer containing a polyamide resin as a main component.