ASA in ASA plastic stands for Acrylonitrile Styrene Acrylate and is a modified ABS plastic. ASA plastic has similar properties to ABS. Additionally, ASA is extremely weather- and UV-resistant, making it suitable for thermoformed parts used outdoors. Its high hardness, impact resistance, and scratch resistance also make ASA ideal for the production of thermoformed covers, containers, and similar thermoformed parts that are used outdoors.
Similar to ABS, ASA plastic is also very easy to process in thermoforming. When storing thermoformable ASA semi-finished products, it is important to note that the thermoplastic is hygroscopic. This means that ASA plastic absorbs moisture from the environment during long-term storage, which can degrade the quality and processing on the thermoforming machine. Just like ABS, ASA material in rolls and sheets is usually not kept as stock, but is instead procured from the thermoforming manufacturer upon customer request. The material delivery times should be considered as lead time when procuring ASA thermoformed parts. An alternative method for producing thermoformed parts from stored ASA is pre-drying using convection heating in a hot air oven. The hot air causes the stored moisture to migrate to the surface and evaporate. However, this additional process step of blistering increases the cycle times.
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Group | Technical Thermoplastics |
Structure | Amorphous |
Density | 1.07 |
Continuous Use Temperature Min. (in °C) | -40 |
Continuous Use Temperature Max. (in °C) | 75 |
Thermal Expansion Transverse/Longitudinal to Flow Direction (10^-6 *K) | 80 - 110 |
Melting Temperature (°C) | 100 |
Max. Temp. Short-Term (°C) | 100 |
Max. Temp. Long-Term (°C) | 90 |
Impact Strength (KJ/m^2) | 60 |
Yield Stress (N/mm²) | 56 |
Tensile Strength (N/mm²) | 36 |
Tensile Modulus of Elasticity (N/mm²) | 2050 |
Elongation at Break (%) | 8 |
Flexural Strength (N/mm²) | 80 |
Ball Indentation Hardness (N/mm²) | 100 |
Dielectric Strength (kV/mm) | 35 |
Volume Resistivity (Ω · m) | 1E12 |
Surface Resistivity (Ω) | 1E13 |
Tracking Resistance CTI | 600 |