| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lightweight foam duct of high heat insulating property, on which dew formation is less liable to be generated. <P>SOLUTION: This foam duct 1 is formed by foaming blow-molding applying the supercritical fluid as a foaming agent, and has a three-dimensionally-bent part composed of a bent part 1b on one side and a bent part 1c on the other end side respectively connected to both ends of a central part 1a. A surface roughness of an outer surface of the foam duct is R45 μm or less, and a foaming magnification is within the range of 2.5-5 times. In addition, foamed cells of small foamed cell diameter are uniformly distributed even to a thin part, whereby the foaming magnification is increased, a weight is reduced and the heat insulating property can be improved. The dew formation can be remarkably reduced when the foam duct is used in an air conditioner and the like of an automobile and the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
