Styrene acrylonitrile (SAN) has good rigidity, strength, and toughness, and better chemical resistance than polystyrene.
SAN absorbs moisture when not stored properly so drying at 80 C [176 F] for 2-4 hours before molding is recommended.
200 C 270 C [392 F 518 F]; 230 C 260 C [446 F 500 F]for most applications. Use the lower end of the range for molding thick wall components
40 C 80 C [104 F 176 F]. SAN solidifies rapidly at higher temperatures. For reinforced grades, use a mold temperature not be less than 60 C [140 F].
35 130 MPa
High speeds are recommended.
You can use all conventional gate types.
The polymerization reaction of styrene and acrylonitrile produces SAN copolymers. They are strong, transparent materials. The styrene component imparts clarity, stiffness, and processability. The acrylonitrile component imparts chemical and thermal resistance.
They have excellent load bearing capacity, rigidity, good resistance to chemicals, heat deformation, and cyclic temperature loads, and dimensional stability. The properties are dependent on the acrylonitrile content and commercial grades offer different acrylonitrile molecular masses. The addition of glass fibers enhances rigidity and resistance to heat deformation, and decreases the coefficient of linear thermal expansion.
The Vicat softening point is approximately 110 C [230 F] and the deflection temperature under load is approximately 100 C [212 F].
Shrinkage ranges from 0.003 0.007 mm/mm [0.3 0.7%].