What is the trend of future coating technologies replacing paint?

The trend of future coating technologies replacing paint is shifting—from being driven primarily by cost and environmental pressures toward a focus on technological innovation and collaboration across the entire industry chain. At the core, this shift revolves around three key areas: material upgrades, intelligent process optimization, and expanded application scenarios. The specific trends are as follows:

I. Material Substitution: From Single-Function Protection to Multifunctional Composites

Powder coatings lead the "paint-to-powder" shift

Powder coatings—such as epoxy and polyester powders—have emerged as a core technology to replace traditional paints, thanks to their zero VOC emissions, high utilization rates (over 95%), and cost-effectiveness. For instance, after adopting powder coatings for photovoltaic frame components and energy storage cabinet housings, the per-unit cost was reduced by 25%, while the coating lifespan extended from 5 to 15 years (as demonstrated by Guanghua Shares). Looking ahead, low-temperature curing powder coatings—like those cured at just 130°C—will further cut energy consumption, making them suitable for an even wider range of heat-sensitive substrates, including wood and plastics.

Rise of Bio-based and Biodegradable Materials

Bio-based polyurethane (Bio-PU), polylactic acid (PLA), and other materials reduce carbon footprints by more than 35% (as demonstrated by the case of Wanhua Chemical), thereby meeting the European Union’s PPWR regulations regarding recycled content (set at 30% by 2030) and compostability. For instance, bio-based PU-coated films are now being widely used in the interiors of new-energy vehicles, balancing environmental sustainability with superior performance.

Nanomodification and Breakthroughs in Smart Materials

Nano-silica, graphene, and other reinforcing materials enhance the weather resistance of coatings (showing a color difference ΔE < 1.5 after 5000 hours of QUV aging), significantly improve adhesion (increasing it by up to four times), and even enable self-healing capabilities—such as polyurethane coatings that can effectively resist scratches. Meanwhile, smart materials like conductive carbon black networks for antistatic films are expanding into high-demand applications, including data centers and medical equipment.

II. Process Innovation: From Post-Spray to In-Mold/Integrated Molding

In-mold coating technology (IMC) disrupts traditional processes.

Cannon and Engel have jointly introduced an in-mold polyurethane coating technology that integrates thermoplastic molding with coating application. This innovative approach reduces VOC emissions by 99% and cuts CO₂ emissions by 60%, while boosting production efficiency fourfold—allowing, for instance, automotive exterior components to be coated in just 2 minutes. Looking ahead, the technology will expand into the home appliance and electronics sectors, enabling transparent or colored coatings as well as the integration of functional films, such as capacitive touch buttons.

Vacuum Pressure Difference Coating (OMR) for Covering Complex Structures

OMR technology achieves intricate textures like wood grain and carbon fiber by using heated vacuum transfer, enabling it to coat substrates such as plastic, metal, and glass—thus replacing traditional methods like water transfer printing and electroplating. For instance, when applied to automotive interior components and appliance housings, OMR enhances pattern precision by up to 30% while eliminating solvent emissions (as demonstrated in the Xintaiming case).

End-to-End Control of Automated and AI-Powered Quality Inspection

5G+ edge computing empowers smart production lines, enabling coating thickness variations of ±1.5μm and achieving a 99.3% yield rate (Stike Case). The AI-powered visual inspection system boosts defect detection accuracy to 99.2%, while integrated blockchain-based carbon footprint tracking ensures compliance with EU EPD regulations.

III. Application Scenarios: From Industrial Protection to Consumer Electronics and New Energy

Automobiles and consumer electronics pave the way for design freedom.

In the automotive sector: Thin-film technology is replacing traditional coatings (such as Japan's Atoms Co. technology), enabling gradient color effects and luminous nighttime patterns, while reducing carbon emissions by 40%. Additionally, the value of vehicle wrapping materials has increased to 3,950 yuan per car, according to a report from Douding.com.

Consumer Electronics: TPU/PVC coated films are used for foldable screen hinges and TWS earphone housings, supporting precision structures (such as a 0.5mm coating thickness) and offering personalized customization options.

New Energy and Energy Storage Drive Performance Upgrades

Lithium batteries: Carbon-coating and oxide-coating technologies enhance the cycle stability of cathode materials (retaining 86% capacity after 600 cycles), making them well-suited for the high energy density requirements of solid-state batteries.

Energy Storage/Photovoltaics: Powder coating insulation and fire-resistant coating withstands high temperatures up to 1200°C, meeting safety standards for battery packs and photovoltaic modules (Aileke Case).

Building and piping industries shift toward green corrosion protection

Profile coating films—such as nano-reinforced water-based PU films—achieve 5,000 hours of salt-spray resistance in architectural doors and windows, serving as a durable alternative to traditional paints. For pipeline coatings, a three-layer polyethylene (3LPE) technology is employed to withstand the extreme conditions encountered in shale gas projects and cross-border pipelines.