Nylon 6,6 is a common example of a polyamide.
Polyamides are polymers that contain repeating amide (-CO-NH-) linkages.
The structure of Nylon 6,6 is
[-NH-(CH_2)_6-NH-CO-(CH_2)_4-CO-]_n
where n is a large number.
The numbers in the name showow that there are six carbon atoms on either side of an amide linkage.
