On October 24, 2025, Toyoda Gosei Co., Ltd. in collaboration with Kansai Paint Co., Ltd. announced the successful development of Japan’s first "in-mold coating technology" for automotive plastic parts. This technological breakthrough specifically targets the improvement of surface finishing in automotive plastics by integrating the painting process directly into the mold during injection molding, rather than relying on conventional post-molding spraying and coating techniques.

This innovation is particularly noteworthy for Original Equipment Manufacturers (OEMs), parts suppliers, and technology vendors across Asia involved in the supply, redesign, and integration of plastic components into high-volume automotive production. The in-mold coating method allows painted finishes to be achieved simultaneously with part shaping, greatly enhancing manufacturing throughput and enabling higher surface quality with fewer defects caused by dust or environmental exposure. Such process improvements support wider adoption in next-generation vehicle interior and exterior applications, especially where complex geometries previously posed coating challenges for automated spray systems.

One of the main industry impacts centers on supply chain and logistics. In-mold coating removes the need for post-molding painting lines and curing ovens, reducing energy consumption, factory floor footprint, and the number of intermediate quality checks. By consolidating surface finishing with molding, Asian manufacturers can more readily implement inline, real-time quality assurance for both coating and part dimensions using advanced diagnostic sensors. This has direct implications for scaling up production of lightweight, colored, or textured plastic surfaces for electric vehicles (EVs), hybrid powertrain covers, and connected vehicle interiors where both aesthetics and durability are increasingly critical for customer satisfaction and regulatory compliance.

From a cost-reduction standpoint, in-mold coating streamlines overall production logistics, lowering direct labor costs, minimizing paint waste, and simplifying equipment maintenance requirements. For R&D teams and process engineers, it opens new possibilities for paint chemistry innovation—enabling development of coatings that bond at lower temperatures, offer superior weatherability, or integrate functional properties such as self-healing or antimicrobial layers. The environmental benefits are also significant, as the system curtails volatile organic compound (VOC) emissions associated with traditional paint shops, helping Asian automakers advance towards net-zero emissions targets and conform with stricter government regulations on industrial pollutants.

Further, executive leadership and industry analysts are likely to view this partnership as a critical milestone in the digital transformation of automotive manufacturing operations. Integration with smart factory platforms leveraging IoT sensors, machine learning, and predictive maintenance enables continuous monitoring of coating quality, part throughput, and process stability. Supply chain managers can use real-time data to adjust material ordering and logistics operations—directly supporting lean manufacturing and just-in-time inventory practices that are essential to maintaining competitive advantage in the region’s fast-shifting automotive market.

Looking ahead, Toyoda Gosei and Kansai Paint plan to roll out the technology to key customers in Japan before expanding to other Asian markets, including China, South Korea, and Southeast Asia. The in-mold coating innovation will be showcased at upcoming industry events and trade exhibitions, where OEMs and major Tier 1 suppliers can assess performance results alongside sustainability and cost-savings metrics. This development signals a broader shift towards integrated, digitally enabled manufacturing and will have ripple effects across the entire Asian automotive supply chain ecosystem, setting a new industry standard for productivity, quality, and environmental stewardship in plastics engineering.