AUTOMOTIVE INTERIORS AND EXTERIORS | MATERIALS
mechanically recycled Stamax resin available under its Trucircle portfolio of circular solutions. SABIC offers three new grades of the mechanically recycled PP grades containing long glass fibres along with the recycled material. Stamax T2E- 40YR240 and T2E-30YR240 are high stiffness grades, while Stamax T5E-40YR27E is a high impact resin. The materials are intended for a range of exterior, structural and interior parts while supporting demand for more sustainable materials that reduce CO2
footprint and enable circularity. A Lucid front-end module on display demon-
strated the high strength to weight ratio achieved in a single-shot injection moulding process with Stamax resin combined with SABIC organic sheets. The pre-cut organic sheets are inserted into a mould, shaped and combined with several additional inserts, then over- moulded with the Stamax to form a lightweight composite hybrid part with a high level of rigidity. The high level of integration resulted in less assembly work and, in turn, lower costs.
Other lightweight solutions
at the K show booth included foamed parts on display. This includes an inner tailgate panel made with new SABIC PP materials which are suited for foam injection moulding and deliver low weight with exceptional aesthetics. The foam injection mould- ing materials are suited to vehicle interior applica- tions. SABIC also showed an all-PP sandwich panel made with an ultra-melt strength (UMS) SABIC PP resin. The material offers outstanding foam-ability to support weight reduction, as well as potential cost optimisation and design for recyclability. Thermoplastics compounder Mocom has supplied no less than three different grades of its Alcom PP or PC materials as part of various decorative trim components on the side doors and dashboard in the newest BMW 1 Series. The grades are used in the individual components of the trim strips and contribute to the high-quality ambience of the vehicle’s interior. Use of the materials in automotive interior lighting applica- tions reflect Mocom’s long-standing co-operation with the BMW group, where its project involvement since 2015 encompasses intensively supported application development and material tests. “The material optimally meets both BMW’s demanding structural and visual requirements,” said Matthias Treglia, Business Development
www.injectionworld.com
Manager for Automotive at Mocom. The side doors and dashboard of the BMW 1
Series are finished with decorative trim strips, each of which is composed of a light diffuser as the upper part and a reflector as the lower component. An Alcom PC 740/4 WT1140-03 LD grade is used in the diffuser as the back injection moulding material for the decorative film of the trim strips to ensure homogeneous illumination of the compo- nent. By combining the decorative foil with the material optically adapted for this purpose, the trim strips can be illuminated in different colours and with different effects, creating a high-quality ambience in the vehicle’s interior while fulfilling its function as a structural component, due to its mechanical properties. The trim strips are also completed at the back with reflectors material from an Alcom PP 620/1 WT 1433-05 LB grade. Its light blocking characteristics guarantee the necessary opacity of the lower component of the door trim strip while at the same time ensuring high light
reflection into the light diffuser. In addition, the
material in this combination reduces unwanted creaking
noises in the side door. The PC/ABS blend of the Alcom PC+AWL 750/15 1 WT1378-04 LB material is used in the dashboard for its light blocking properties and to ensure good bonding with other PC and ABS components. Covestro presented functional materials solutions for car interiors that further automotive megatrends such as autonomous driving, electrifi- cation, and personalisation. The company says its Makrolon Ai PC material offers a special edge-lit composite colour that can range from transparent to translucent, providing various options for ambient and dynamic automotive interior lighting. The PC can be combined with its Maezio compos- ite, a lightweight material made partly from post-industrial recycled materials, for design freedom. Covestro developed Makroblend OM 845G, its first shrinkage-free, highly dimensionally stable, transparent and heat resistant PC blended 20% with glass fibres that can be back injection mould- ed and backlit to create textured and 3D shapes. Avient has extended its sustainability portfolio in Europe with the introduction of new recycled
November/December 2022 | INJECTION WORLD 45
Left: At K2022, Sabic displayed a prototype of a full structural tailgate carrier produced using its mechanically recycled Stamax resin available under its Trucircle portfolio of circular solutions
IMAGE: SABIC
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