| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight foam duct having an excellent heat insulation property and hardly causing dew condensation. SOLUTION: The foam duct 1 includes a three-dimensionally bending bent portion composed of one end bent portion 1b and the other end bent portion 1c which are provided adjacently at both ends of the center 1a. Surface roughness on the outer surface of the foam dust is Rt 45μm or smaller, and an expansion ratio is within 2.5-5 times. In addition, foamed cells having small diameters are uniformly distributed in the foam duct including a thin-walled portion, and the foam duct has a high expansion ratio, is light in weight and has the excellent heat insulation property. Thereby, when the foam duct is used for an air conditioner or the like for an automobile or the like, the amount of dew condensation is remarkably reduced. COPYRIGHT: (C)2010,JPO&INPIT |
