Explanatory notes
… ‑11, ‑12, ‑6,6, ‑6,9, ‑6,10 or ‑6,12 3908.90 ‑ Other This heading covers polyamides and copolymers thereof. Linear polyamides are known as nylons. Polyamides are … certain amino‑acids (e.g., 11‑aminoundecanoic acid) or by rearrangement polymerisation of lactams (e.g., …