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Multiple surfaces in automotive interiors are required to have high durability, pleasant appearance, and good haptic.Typical examples are instrument panels, door coverings, center console trim and glove box lids. 

Probably the most important surface in the automotive interior is the instrument panel. Due to its positioning directly under the windscreen and its long lifetime, the material requirements are very high. Additionally, it is a very large part that makes the processing a significant challenge.

In close collaboration with Kraton Corporation and based on their IMSS technology, HEXPOL TPE used their long-term compounding experience to develop ready-to-use materials.

A full instrument panel skin was injection molded with Dryflex HiF TPE. This skin can be back foamed with PU foam and a carrier material made from a hard thermoplastic (e.g., PP). For a good adhesion between the TPE skin, foam, and PP carrier, the surface is usually activated by flame-treatment with a gas burner. With this process, it is possible to produce a large-scale surface with excellent surface properties and a soft haptic. They also offer low gloss and a very high scratch-/abrasion resistance. The ability of TPE to be used in multi-component injection molding opens new possibilities of direct overmoulding of Polypropylene. Compared to existing TPU or PU-RIM processes often realized with PC/ABS as the hard component, the ability to adhere to PP can deliver further cost and weight reduction in 2K processes.

(References: HEXPOL TPE+ Kraton Corporation IMSS)

 As well, It is possible to produce all kinds of surfaces in the automotive interior by injection molding of the new material patented dynamic vulcanizate thermoplastic Silicone-based elastomers (Si-TPV), it is showing good scratch resistance and stain resistance, can pass the strictest emission tests, and their odor is barely noticeable, additionally, parts made from Si-TPV can be recycled in closed-loop systems, which supports the need for higher sustainability.