PA12
Polyamide 12
Glass Transition (Tg)
37–40 °C
Melting Point (Tm)
175–180 °C
Density
1.01–1.02 g/cm³
CAS Number
24937-16-4
Recycling Code
♺ 7
Category
Engineering
Repeat Unit
–[NH–(CH₂)₁₁–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
Lowest water absorption of the aliphatic polyamides (~1.5 %); outstanding dimensional stability; the workhorse of SLS 3D printing.
Applications
SLS 3D printing powder, brake lines, optical cable sheathing.