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ASA - Acrylonitrile Styrene Acrylate Plastic
INTRODUCTION
ASA is an acrylate rubber modified styrene acrylonitrile copolymer with an acrylate rubber modifier included at the polymerisation stage.
PROPERTIES
ASA offers a broad range of exceptional properties. They feature high thermal stability, good chemical resistance and excellent resistance to weathering, ageing and yellowing therefore it is often used in applications which involve exposure to extreme conditions. ASA also withstands hot-water treatments such as the removal of the wax layer from new vehicles and frequent car washes. |
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GRADES AVAILABLE
A variety of grades are available for different applications, the material is typically injection moulded or extruded. |
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PHYSICAL PROPERTIES
| Tensile Yield Strength |
50 |
Mpa |
| Notched Impact Strength |
2.3 |
Kj/m² |
| Thermal Coefficient of expansion |
na |
x 10-6 |
| Max Cont Use Temp |
na |
oC |
| Density |
1.07 |
g/cm3 | |
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RESISTANCE TO CHEMICALS
| Dilute Acid |
*** |
| Dilute Alkalis |
*** |
| Oils and Greases |
*** |
| Aliphatic Hydrocarbons |
*** |
| Aromatic Hydrocarbons |
** |
| Halogenated Hydrocarbons |
** |
| Alcohols |
*** | |
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KEY
| * |
poor |
** |
moderate |
*** |
good |
**** |
very good | |
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APPLICATIONS
ASA grades offer a broad range of exceptional properties. They feature high thermal stability, good chemical resistance and excellent resistance to weathering, ageing and yellowing. Therefore, ASA is used in applications which involve exposure to extreme conditions.
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| CURRENT CASE STUDIES | |
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| Automotive |
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In the last 15 years, ASA has captured a large share of the market for exterior automotive parts. More and more users choose ASA because of its superior properties and its ability to resist UV radiation. Even after long-term weathering, ASA does not show the greying typical of even UV-stabilized ABS. Also, ASA withstands hot-water treatments such as the removal of the wax layer from new vehicles and frequent car washes. The cost saving compared with coated or painted ABS provides a further incentive for the change to ASA.
Typical ASA applications in the automotive sector are exterior mirror housings, radiator grills, centre pillar trims, window frames, cowl vent grills, fairings and lamp housings. Even relatively large covering panels are often made from ASA.
Coloured ASA is increasingly used instead of metal, coated or painted ABS, or SMC materials for moped, motor scooters and motorcycle fairings. ASA has also been successfully used for many years in exterior parts of recreational vehicles and trailers.
The commercial vehicle sector is of increasing importance. Draft deflectors, steps, radiator grills and exterior mirror housings from Luran® S have so far been developed in joint projects. Dashboards and trim panels made from Luran® S have long been in use in agricultural vehicles.
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Electrical Engineering and Electronics |
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A typical application for ASA, with its resistance to weathering, is antenna construction. Wind and weather subject the external elements of antennas to severe attack. Unsuitable materials corrode or become brittle. ASA is not just an all- weather plastic; it is also the ideal material for heavily used household appliances and long-lived consumer goods, for example “white goods”.
Because of its exceptional UV stability, well-known antenna manufacturers use ASA for items such as parabolic reflector coverings, mobile antennas, TV antenna parts, cable connection housings, weatherproof protective housings for satellite electronics, diplexer housings and amplifier parts.
ASA is distinguished by high heat resistance and colour stability combined with excellent resistance to oils, fats and other chemicals – properties which meet the stringent requirements of manufacturers of washing machine panels, refrigerator handles, mouthwash housings, sewing machines, kitchen appliances, grills and microwaves.
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Sport and Leisure |
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Surfboard or sailboat, golf trolley or skibox – Luran® S makes sure that you can enjoy your leisure time. The superior properties of ASA are seen in improved long-term serviceability. Injection-moulded or extruded, ASA performs in any weather.
The applications are extensive. They range from surfboards and snowboards to moped and motorcycle fairings.
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Cosmetics and Hygiene |
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The combination of properties which gives ASA its success, namely excellent resistance to weathering, ageing and yellowing, have been tried and tested for many years in innumerable applications, both indoors and outdoors.
Thanks to its thermal resistance and high color stability, Luran® S is an ideal material for electric appliances that are exposed to high heat stress. These include espresso and coffee machines, microwave ovens and sewing machines. Owing to its special resistance to weathering, Luran® S is also very well-suited for parts used for television antennas, parabolic dishes, solar panels, motion sensors as well as housings for alarm systems.
More information: click here |
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