ASHRAE/UMC actually specify tape 'for ducts' to be UL 181A-P/181B-FX [0] which is commonly made of metal foil and not cloth.
[0] https://tapeuniversity.com/products/foil-tapes/ul181ap-ul181...
[0] https://tapeuniversity.com/products/foil-tapes/ul181ap-ul181...
Even your own source on a separate page [3] says:
> After the war, duct tape became popular with the general public. One popular use was holding together ventilation ducts. Ironically, while this is a use that duct tape does not normally have today, the name stuck and is used to this day.
So I am now confused.
[0] https://www.chicagotribune.com/redeye/redeye-is-it-duck-or-d... [1] https://en.m.wiktionary.org/wiki/duct_tape [2] http://www.todayifoundout.com/index.php/2010/02/duct-tape-wa... [3] https://tapeuniversity.com/industry/building-construction/du...