Covestro & GAC Unveil Sustainable, Lightweight Composite Seat Back for the Aerodynamic ENO.146 Electric Concept

A lightweight thermoplastic composite seat back that also champions sustainability is in the works through a partnership between Covestro and the R&D Center of Guangzhou Automobile Group Co. Ltd. (GAC). This seat back is for GAC’s latest concept electric vehicle, the ENO.146, which debuted at the Guangzhou International Automobile Exhibition.

GAC describes the ENO.146 as one of the most aerodynamically efficient cars worldwide, boasting a drag coefficient of only 0.146 (hence the name) and an NEDC range of 1,000 km (621 mi). Achieving such performance hinges on a fully aerodynamic design, but GAC’s R&D Center also employs lightweight, sustainable materials to cut vehicle weight while elevating sustainability standards. Covestro’s Maezio thermoplastic composite is a key component. Maezio’s CFRTP (carbon‑fiber reinforced thermoplastic) blends continuous carbon fibers with thermoplastics such as polycarbonate and TPU.

The backrests of both front seats in the concept car are constructed from Maezio CFRTP. Analysts estimate the composite seat back can reduce weight by up to 50 % compared with conventional metal construction.

“Seats in the passenger compartment are an ideal target for weight savings, as they are among the heaviest parts,” says Lisa Ketelsen, head of Covestro’s thermoplastic composites business. “Fiber‑reinforced composites are the ideal material for lightweight automotive construction, but Maezio can further simplify molding and streamline the manufacturing process.”

Unlike metal seats that require multiple fittings and assemblies, thermoplastic Maezio allows functional structures to be integrated directly into the injection mold. This consolidation reduces part count and material usage.

“Mobility trends such as electrification and autonomous driving are redefining the role and function of car interiors,” says Zhang Fan, vice‑president of the GAC R&D Center. “There is a growing need for material solutions that are lightweight and sustainable while enabling new user experiences—from visual to tactile feedback.”

From a color, material, finish (CMF) standpoint, the ENO.146 interior draws inspiration from nature. Chief designer Stephen Chen explains the green palette and sustainable materials aim to evoke the ambiance of a lotus‑laden lake. The front seat’s surface pattern mimics lotus leaves. “The backrest must fit this concept as a visible element, so the material must look natural, feel premium, and be recyclable,” Chen says.

Maezio meets these criteria. Its thermoplastic composite can be easily cut and reshaped for end‑of‑life reuse, offers a marble‑like appearance, and delivers a high‑quality feel—making it an ideal, sustainable choice that aligns with the vehicle’s nature‑inspired design.