SAN Resin

SAN Resin Properties & Uses

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Material SAN
Chemical Name Styrene Acrylonitrile
Structure Amorphous
Opacity Transparent
Strength Brittle
Specific Gravity 1.08
Shrinkage 0.3% to 0.7%
Melting Point 239° F
 Deflection Temperature 183.2° F – 204.8° F
Service Temperature 131° F

Applications

Styrene Acrylonitrile resin is a copolymer plastic commonly used in place of Polystyrene due to its greater thermal resistance.

SAN copolymers are produced by the polymerization reaction of styrenes and acrylonitrile. The properties are dependent on the acrylonitrile content. Commercial grades of SAN offer different acrylonitrile molecular masses.

The transparency of SAN makes it one of the few plastics that can be used in clear applications. It’s glass-like clarity makes it a preferred plastic in the housewares market.

SAN is commonly used in the following applications:

  • Dishwasher-Safe Containers
  • Disposable Lighters
  • Brush Bristles
  • Auto Gauge Covers
  • Cosmetic Cases
  • Medical Syringes
  • Reflectors
  • Refrigerator Doors
  • Battery Cases
Advantages Some of the advantages of SAN include:

  • Excellent Rigidity/Stiffness
  • Excellent Load-Bearing Capacity
  • Excellent Chemical Resistance
  • High Flexural Strength
  • Good Appearance
  • Good Color-Ability
  • Good Clarity
  • Good Thermal Resistance
  • Good Dimensional Stability
  • Good Heat Resistance
  • Easily Processed
Disadvantages

Some of the disadvantages of SAN include:

  • Low Max Service Temperature
  • Hygroscopic
  • Yellowing with Age
  • Flammable with High Smoke Generation

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To avoid improper resin selection, Contact PMC for additional help in determining the exact engineering resin required for your application.