Blends (plastic blends)
Description (definition)
Blends, also known as plastic blends, are material mixtures of two or more different polymers. This combination makes it possible to unite the positive properties of the individual plastics in one material. For example, a blend can combine the flexibility of an elastomer with the strength of a thermoplastic. Frequently used plastic blends are PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene) or PPE/PS (polyphenyl ether/polystyrene).
Example
A well-known example is the use of PC/ABS blends in the automotive industry. This material is used for dashboards and outer housings of headlights, as it offers high impact resistance, heat resistance and an aesthetic surface.
Why are plastic blends used?
Plastic blends make it possible to adapt material properties that could not be achieved with individual polymers. For example, a blend can combine the chemical resistance of one polymer with the impact strength of another. This allows specific requirements in sectors such as the automotive, electrical or construction industries to be met.
How are blends produced?
Blends are usually produced using a melt blending process. The different polymers are mixed under heat and pressure to achieve a homogeneous material distribution. Depending on the composition, additives such as stabilizers or colour pigments can be added to further optimize the properties.
What are the typical areas of application for plastic blends?
Plastic blends are widely used in the automotive industry (e.g. for interiors and housings), in electronics (for impact-resistant housings) and in the construction industry (e.g. for weather-resistant components). They offer an optimum combination of performance, design and economy.