PA6
Polyamide 6 (Nylon 6)
Glass Transition (Tg)
47–60 °C
Melting Point (Tm)
220–225 °C
Density
1.13–1.15 g/cm³
CAS Number
25038-54-4
Recycling Code
♺ 7
Category
Engineering
Repeat Unit
–[NH–(CH₂)₅–CO]ₙ–
The repeating unit is the smallest structural fragment whose repetition builds the whole chain. Subscripts show the relative share of each unit in copolymers.
Key Properties
Ring-opening polymerisation of caprolactam; excellent wear resistance and toughness; absorbs up to 9–10 % water, which plasticises it and lowers Tg significantly.
Applications
Textile fibre, gears and bearings, automotive air-intake manifolds, films.