| 摘要 |
PURPOSE:To decrease noise after satisfying the condition as a duct that necessary air does not leak, by providing an opening at least at a part of a duct body and mounting in one body with the duct a soft polyurethane foam sheet, which has continuous foam but a low air permeability. CONSTITUTION:A soft polyurethane foam sheet 3, which has continuous foam but a low air permeability, is mounted with an adhesive or pressure sensitive adhesive to the opening of a duct body, which is formed by blow-molding or injection-molding a polyethylene resin or polypropylene resin, and thus a dust structure is produced. This duct structure is used by being attached to an air conditioner unit for an automobile. |
