| 摘要 |
The present invention provides a thermoplastic polyurethane composition which comprises an ethylene-vinyl alcohol copolymer and/or a polyamide, and a thermoplastic polyurethane, in which the retention of melt tension thereof, when kept in a molten state at 220� C for 1 hour, determined by the following equation (1), is not less than 10%. <?in-line-formulae description="In-line Formulae" end="lead"?>Retention of melt tension (%)=[Melt tension after being kept in a molten state/Melt tension before being kept in a molten state]x100 (1) <?in-line-formulae description="In-line Formulae" end="tail"?> The thermoplastic polyurethane composition of the present invention is excellent in production stability of a molded article, and can provide a molded article excellent in appearance because the progress of gelation thereof is suppressed even in a molten state. |
