The two new materials are around 30 to 40 percent easier flowing than the standard glass-fiber-reinforced PC+ABS blends Bayblend® T88-2N und T88-4N that have become established in the production of molded parts. What’s more, they are around 25 to
30 percent stiffer. Bayblend® DP T88 GF-20, for example, has an elasticity modulus of 7,500 MPa. It was even possible to enhance the strength values (tensile stress at break) by around 50 percent. “This enables a reduction in wall thicknesses in geometrically complex, large-format components such as instrument panels, which not only saves materials but also shortens cooling and cycle times, resulting in cost-efficient production. Design is also easier because fewer reinforcements are required,” explains Martin Häussler, Technical Product Manager for Bayblend®. Impact resistance could also be increased by around 40 to 50 percent, which enhances the overall mechanical performance. Moreover, the blends demonstrate much higher resistance to storage in hot or humid conditions and much greater heat-aging and UV stability. Both new PC+ABS blends adhere well to the polyurethane foam systems used as padding for instrument panels. Their heat resistance of around 130 °C (Vicat/B 120) means that heat resistance requirements for instrument panel supports can easily be incorporated into the design. Despite their glass-fiber content, the two new thermoplastics produce components of excellent surface quality. The parts can be coated, or – because of their greatly enhanced UV stability – can also be used without a coating. They also fulfill all the automotive industry’s key requirements regarding odors and emissions in interior applications.
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