SAN (Styrene Acrylonitrile)

SAN is ABS without the Butadiene. It does not have the Impact Strength of ABS, but can be crystal clear. Styrene Acrylonitrile has better general chemical resistance than polystyrene and is cheaper than acrylic. It has a good combination of rigidity, strength, toughness and transparency.

Applications: Battery cases, Dials, Knobs, Switches, Lenses, Trays, Containers, Covers, Autoclavable devices, Dental & Medical light diffusers

Advantage

 

Heat Resistant
High Clarity
High Flow and Rigidity
Dimensionally Stable

Disadvantage

 

Low impact strength
High processing temps
Flammable-smoke generation
Yellows quicker than other PS

Tensile StrengthFlexural ModulusImpact StrengthMax Temp.Chemical Resistance
10,000-18,000 psi500,000-1,200,000 psi.3-3.0 ft-lb/in notched izod140°-200° FPoor to Fair