In HVAC (Heizung, Belüftung, und Klimaanlage) ventilation engineering, ducting aluminum foil is the core functional substrate for insulated ducts and semi-rigid ventilation ducts, directly determining the airtightness, insulation efficiency, and service life of the ventilation system. Ordinary aluminum foil on the market is prone to problems such as air leakage, condensation, and delamination due to poor formability, numerous pinhole defects, und …