Class 1 flexible uninsulated duct with polymer core and integrated flame resistant barrier layer, method of use, and method of making

A flexible uninsulated air duct that meets Underwriter Laboratories (UL) 181 Class 1 air duct standard comprising:

• a first polymer film,
• a second polymer film,
• a flame resistant barrier material, and
• a helical wire,
• the helical wire disposed between the one of the first and second polymer films and the flame-resistant barrier material, the first and second polymer films, the helical wire, and the flame-resistant barrier material attached together using at least one adhesive to form a duct wall of the flexible duct, the flexible uninsulated air duct meeting the testing requirements set forth in the UL 181 Class 1 air duct standard.

A flexible uninsulated air duct that meets Underwriter Laboratories (UL) 181 Class 1 air duct standard comprising:

• a two film laminate,
• a polymer film, and
• a helical wire disposed between the two film laminate and the polymer film, the two film laminate, polymer film, and helical wire attached together to form a duct wall of the flexible duct,
• the two film laminate further comprising first and second polymer films, a flame-resistant barrier material positioned between the first and second polymer films, and an adhesive to join the first and second polymer films and flame-resistant barrier material together, the flexible uninsulated air duct meeting the testing requirements set forth in the UL 181 Class 1 air duct standard.

A laminated film for use in a flexible uninsulated air duct comprising:

• either first and second polymer films;
• or
• a first polymer film;
• a flame resistant barrier material positioned between either the first and second polymer films or adjacent to the first polymer film;
• and
• either an adhesive to join either the first and second polymer films and flame resistant barrier material together;
• or
• an adhesive to join the first polymer film and the flame resistant barrier material together.