ASA
ASA (Acrylonitrile Styrene Acrylate) is a thermoplastic polymer closely related to ABS but with enhanced weatherability and UV resistance. It is commonly used in FDM 3D printing for outdoor and functional parts where mechanical strength and environmental resistance are required. ASA offers similar printing properties to ABS but with better stability in harsh conditions.
Benefits
Excellent UV and weather resistance
Good mechanical strength and toughness
Decent heat resistance
Better chemical resistance than ABS
Limitations
May be challenging to print
Limited availability of speciality colours
Not biodegradable
Industries
ASA is widely used in automotive, outdoor equipment, consumer goods, electrical enclosures, and sporting goods industries. It is preferred for parts exposed to sunlight, weather, and harsh environmental conditions where mechanical strength, UV stability, and durability are critical. Typical applications include exterior housings, functional prototypes, snap-fits, and outdoor fixtures.