| 摘要 |
PROBLEM TO BE SOLVED: To provide an intermediate insulating product comprising a planar insulating layer having a top side in which a plurality of parallel channels having cross-sections with tapered sides are formed.SOLUTION: A vapor proof layer 18 is applied to a top surface after a plurality of parallel channels 14 have been formed such that the vapor proof layer 18 bridges the channels 14. The intermediate insulating product is then bent with mechanical manipulation in regions adjacent to the bottom of the channels 14 thereby causing the channels 14 to close to form a non-planar, derivative insulated duct product 30, and the vapor proof layer 18 forms a vapor proof inner lining 18 in the derivative insulated duct product.SELECTED DRAWING: Figure 1F |
