| 摘要 |
PROBLEM TO BE SOLVED: To provide a rain gutter made of polycarbonate and excellent in weatherability. SOLUTION: A polycarbonate surface layer 12 including an ultraviolet ray absorbent at a content ratio larger than the content ratio of the ultraviolet ray absorbent of a rain gutter body 11 is integrally laminated on the surface of the rain gutter body 11 molded with polycarbonate including a small quantity of the ultraviolet ray absorbent to form a rain gutter 1. The monofunctional or bifunctional or more ultraviolet ray absorbent having a specific functional group is preferably mixed as the ultraviolet ray absorbent of the polycarbonate surface layer 12, and it is reacted and bonded with polycarbonate polymer molecules.
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