| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure useful as a gasoline transport tube. SOLUTION: The multilayer structure having the polyamide as the base comprises a first layer (1) made of a mixture of a polyolefin PO<SB>1</SB>in which a polyamide P<SB>1</SB>or a polyamide P<SB>1</SB>as a matrix and a polyamide P<SB>1</SB>, a layer (2a) made of an EVOH used as needed, a layer (2) made of a mixture of 6/12 copolyamide in which one has a weight of a PA-6 larger than that of a PA-12 and the other has a weight of a PA-12 larger than that of the PA-6, and a layer (3) made of a polyamide P<SB>3</SB>, sequentially provided in the above order, so that the respective layers are adhered to each other via contact regions, the P<SB>1</SB>and the P<SB>3</SB>may be the same or different. In this structure, a tubular state can be formed so that the layer (1) or (1a) is at an inside and the layer (3) is at an outside, and manufactured by co-extruding. The first layer may contain a conductive carbon black to reduce its surface resistivity to 10<SP>6</SP>ohms or less. COPYRIGHT: (C)2003,JPO
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