8011 aluminum foil is used as flexible aluminum foil air duct for HVAC ventilation because of its advantages of good extensibility, lightweight, waterproof, oilproof, fireproof, dustproof and low cost. It can be made by spiral continuous tight clamping and has high corrosion resistance and thermal conductivity, which can effectively protect the service life of the air duct. Meanwhile, 8011 aluminum foil …