Leave Your Message
Coil coating is a continuous, highly automated industrial process in which metal substrates — typically aluminum or steel — are cleaned, pre-treated, and coated with functional paints or lacquers before being formed into finished packaging components. In the food packaging sector, coil-coated metal is the backbone of beverage cans, food tins, aerosol containers, and aluminum foil lids. The coating layer must simultaneously deliver outstanding opacity and whiteness, chemical resistance, food-contact safety, and formability — requirements that place titanium dioxide (TiO₂) at the very heart of every high-performance food packaging coating formulation.
Modern coil coating lines run at speeds of 60–200 m/min, applying multiple layers of primer and topcoat with precision. This pre-coating approach eliminates post-fabrication painting, reducing VOC emissions and waste by up to 80% compared to conventional methods.
All coatings applied to food packaging substrates must meet stringent global regulations including FDA 21 CFR, EU Regulation 10/2011, and GB 9685 in China. TiO₂ used in these formulations must be food-grade, non-toxic, and free from heavy metal contamination.
High-whiteness coatings enabled by rutile TiO₂ provide the bright, clean visual base essential for food brand graphics. Superior opacity ensures full coverage in a single thin layer, reducing material costs while maximizing shelf-appeal and consumer trust.
Beyond aesthetics, coil coatings must resist corrosion, moisture, acidic food contents, and thermal processing. Rutile TiO₂ with optimized surface treatments dramatically improves the coating's durability, UV resistance, and long-term barrier integrity.
Our premium rutile titanium dioxide grades are engineered specifically for coil coating applications in food packaging — delivering exceptional whiteness, dispersion, and food-contact compliance.
Coil coating with high-performance TiO₂ serves a broad spectrum of food and beverage packaging formats. Each application demands a precisely engineered coating system to meet both functional and regulatory requirements.
Steel and tinplate food cans for vegetables, fruits, soups, and pet food rely on interior epoxy or polyester coatings loaded with fine-particle rutile TiO₂. The pigment provides the white base coat that prevents metallic show-through and ensures printed graphics remain vivid after retort sterilization at temperatures above 121°C.
The exterior of aluminum beverage cans demands ultra-thin (3–7 µm) coatings with maximum opacity. Chloride-process rutile TiO₂ with tight particle size distribution (0.2–0.3 µm) achieves the highest scattering efficiency, enabling full hiding power at minimal pigment loading — critical for the high-speed necking and flanging operations.
Ring-pull ends for cans and peelable foil lids for dairy and ready-meal trays are punched and drawn from pre-coated coil stock. The coating must survive severe deformation without cracking or adhesion loss. Flexible polyester-based coatings incorporating surface-treated TiO₂ provide the necessary elongation while maintaining barrier properties.
Formed aluminum food trays for airline catering, ready meals, and bakery products use coil-coated aluminum with food-safe lacquers. TiO₂ pigmentation in the topcoat delivers a hygienic white appearance, heat resistance during oven cooking, and prevents discoloration from fatty acids and organic acids in food contact.
Whipped cream dispensers, cooking spray cans, and pressurized food containers require coatings that withstand internal pressure and aggressive propellants. Rutile TiO₂ in solvent-borne or UV-cure coatings provides both the decorative white base and enhanced chemical resistance required for these demanding applications.
Bottle caps, crown corks, and twist-off lids for jars and bottles are stamped from coil-coated tinplate or steel. The plastisol or organosol lining systems incorporate TiO₂ to provide opacity and to meet food-contact safety standards. Consistent particle size and surface treatment of TiO₂ ensure stable dispersion in these specialized systems.
The global food packaging coil coating industry is undergoing rapid transformation driven by sustainability mandates, digital printing integration, lightweighting imperatives, and the shift toward bio-based coating chemistries.
Regulatory pressure from the EU Green Deal and China's dual-carbon policy is accelerating the transition from solvent-borne to waterborne and UV-cure coil coating systems. Water-based coatings require TiO₂ grades with optimized hydrophilic surface treatments to achieve equivalent opacity and adhesion at lower pigment volumes.
The push to reduce metal content in food cans has led to substrate thicknesses below 0.1 mm in some applications. Thinner substrates demand coatings with even greater flexibility, adhesion, and barrier performance — driving demand for higher-quality TiO₂ with superior surface treatment technologies that enhance inter-coat adhesion.
Digital inkjet printing directly onto pre-coated metal coil is emerging as a disruptive technology for short-run and personalized food packaging. The white base coat — pigmented with high-opacity rutile TiO₂ — is critical for achieving accurate color reproduction and ink adhesion in digital printing workflows.
The global phase-out of bisphenol A (BPA) from food can linings is reshaping coating chemistry. New polyester, acrylic, and bio-based epoxy systems require TiO₂ grades that maintain stable dispersion and performance in these novel resin matrices, creating demand for tailored surface treatment solutions.
Active and intelligent packaging concepts — including oxygen scavenging coatings, time-temperature indicators, and NFC-enabled labels — are being integrated into coil-coated food packaging. TiO₂'s photocatalytic properties are being explored for antimicrobial coating applications in food-safe concentrations.
Chloride-process rutile TiO₂ — offering superior purity, consistent particle size, and better photostability than sulfate-process grades — is gaining market share in premium food packaging coil coating applications. Manufacturers in China are rapidly expanding chloride-process capacity to meet global demand.
Among all white pigments, rutile titanium dioxide delivers an unmatched combination of optical efficiency, chemical inertness, and regulatory compliance that makes it the universal choice for food packaging coatings worldwide.
Rutile TiO₂ has a refractive index of 2.73 — the highest of any commercially available white pigment. This means maximum light scattering and hiding power per unit weight, enabling formulators to achieve full opacity in coatings as thin as 5–8 µm, critical for high-speed coil coating processes.
Food packaging coatings must withstand sterilization temperatures (121°C+), acidic and alkaline food contents, and aggressive cleaning agents. Rutile TiO₂ is chemically inert across a pH range of 1–14 and thermally stable to over 600°C, ensuring coating integrity throughout the product's shelf life.
Premium rutile TiO₂ grades for food packaging meet FDA 21 CFR 178.3297, EU Regulation (EC) 1333/2008, and China GB 25577 standards. Our products undergo rigorous heavy metal testing, migration testing, and microbiological assessment to ensure complete food-contact safety.
In high-speed coil coating operations, TiO₂ must disperse rapidly and uniformly in coating formulations with minimal grinding energy. Our surface-treated rutile grades feature optimized organic and inorganic surface coatings that ensure fast wetting, stable dispersion, and consistent gloss in the final coating.
We are a professional company dedicated to providing titanium dioxide solutions for the plastics, coatings, and paper industries. With a skilled and experienced team, we look forward to working with you in the near future.
Relying on the Chinese market, our titanium dioxide products are exported to Southeast Asia, Africa, South America, North America, and other regions.
With over 20 years of development and growth, our company has established a strong competitive advantage and a leading position in the industry. To meet international environmental standards, all of our current products are now compliant with eco-friendly and non-toxic requirements.
TiO₂ provides whiteness, opacity, UV protection, and visual appeal in plastics. The global plastics industry consumes ~35–40% of all TiO₂ produced. Three parameters consistently determine success: dispersion quality, yellowness index, and UV durability.
view moreSelecting the correct rutile TiO₂ grade for coil coating applications requires understanding particle size distribution, surface treatment chemistry, and compatibility with specific resin systems used in food packaging.
Understanding the fundamental differences between rutile and anatase TiO₂ crystal structures is essential for buyers specifying pigments for food packaging coil coating — where rutile's superior durability and opacity are decisive advantages.
Our team's collaborative approach to supply chain management and customer technical support continues to drive growth across all major food packaging markets in Asia, Europe, and the Americas.
Chinaplas 2026 delivered clear signals: sustainability, digital transformation, and food safety compliance are the three forces reshaping the TiO₂ and coil coating industries for the next decade.
Our team attended Chinaplas 2026 opening day, connecting with global coatings formulators, packaging manufacturers, and TiO₂ producers to understand the evolving needs of the food packaging coil coating market.
Xiamen Zhonghe Trading announced its participation at Chinaplas 2026 in Shanghai, showcasing its full portfolio of rutile TiO₂ grades optimized for food packaging coil coating and related applications.
Our team's benchmarking visit to KunCai Technology provided valuable insights into advanced TiO₂ surface treatment technologies and their application in high-performance food packaging coatings.
Explore our full portfolio of rutile and anatase titanium dioxide grades — each engineered to meet the specific performance, safety, and regulatory requirements of food packaging coil coating applications worldwide.
Connect with our technical team to find the ideal rutile TiO₂ grade for your specific food packaging application — from beverage cans to aluminum foil trays.
Get a Free Technical Consultation