Lacquered Aluminum

Foreword

In the highly competitive consumer goods and pharmaceutical markets, packaging is the first touchpoint of a brand. From the smooth peeling of a yogurt lid to the reassuring pop of a blister pack, behind these ultimate experiences lies an "unsung hero"—Lacquered Aluminum Foil.

What is Lacquered Aluminum Foil?

• Basic Definition: A composite material created by applying one or more layers of special resin lacquer onto the surface of bare aluminum (sheet, coil, or foil) through a precision process, followed by high-temperature curing.
• Core Form (Lacquered Aluminum Foil): With an ultra-thin aluminum foil substrate (0.015mm - 0.05mm), it requires extremely high coating precision. It is the most widely used branch with the highest technical barriers.
• Special Lacquers: Utilizing food/pharmaceutical-grade resins, primarily including Epoxy (excellent corrosion resistance), Polyester (high flexibility), and Acrylic (superior printability).

Why is "Lacquering" Essential?

Bare aluminum is prone to oxidation and cannot bond directly with plastics. Specialized coatings endow it with four irreplaceable advantages:

1. Absolute Barrier (Anti-corrosion & Isolation): Perfectly isolates the metal from acidic or high-salt substances, ensuring absolute safety for food and pharmaceuticals.
2. Core Technology (Heat Sealability): Under heat and pressure, the inner special heat-seal lacquer instantly bonds flawlessly with PP, PS, PET, PVC, or glass containers without the need for glue.
3. Visual Enhancement (Color & Primer): Offers transparent, golden, colored, or matte finishes. It also acts as an excellent primer, making subsequent ink printing more vibrant and durable.
4. Mechanical Protection (Anti-scratch & Lubrication): Provides the necessary slip (lubrication) for high-speed packaging lines, preventing mechanical damage during stamping and folding.

Product Specifications & Surface Treatments (Worthwill Core Parameters)

Surface Treatments

Besides standard plain coating, we also support: Brushed, Embossing, and Mirror finishes.

Lacquered Aluminum Foil

Double-sided coated with solvent-based or water-based primer, protective layer, and heat-seal lacquer, exclusively designed for food and pharmaceutical-grade packaging.

• Alloy & Temper: 8011, 8079 (O Temper)
• Dimensions: Thickness: 0.008mm–0.2mm | Width: 60mm and above
• Roll ID: 75mm or 150mm
• Coating Thickness / Weight:
  • Conventional Coating: 8–13 GSM
  • Gold/Yellow Coating: 5-6 g/m² for double-sided | 2-4 g/m² for single-sided
• Common Coating Types: Double-sided transparent epoxy varnish; OR single side transparent varnish + the other side color coating (White/Gold/Custom Colors).

Lacquered Aluminum (Coils/Sheets)

• Alloy & Temper: 1000, 3000, 5000 Series (H12, H22, H24, H26, H42, H44, H46)
• Dimensions: Thickness: 0.18mm–3.0mm | Width: 100mm–1500mm
• Coil Parameters: Coil ID: 508mm / 610mm | Single Coil Weight: 1.6 to 3 tons (Max 6 tons)
• Paint Thickness Control:
  • Back coating: 3–12 µm
  • Single coating: 4–20 µm
  • Double coating: 25–28 µm
  • Triple coating: 30–38 µm

Core Application Scenarios

• High-End Food & Dairy: Yogurt/Dessert Lidding Foil (leak-proof and peelable), Airline Food Containers (high-temperature, oil, and acid resistant), Ring Pull / Peel Off Ends (edge rust prevention and freshness preservation).
• Strict Pharmaceutical Packaging: PTP Blister Foil (FDA-grade non-toxic heat seal, pill protection), Cold Form Foil / Alu Alu (extreme stretchability and moisture barrier).
• Cosmetics & Personal Care: Cosmetic/Toothpaste Tube Laminates (prevents essential oil volatilization), Premium Sample Sachets (light-blocking to prevent active ingredient degradation).
• Industrial & Special Applications: Hydrophilic Fin for Air Conditioners (anti-corrosion and rapid condensation drainage), Underground Cable Shielding Tape (insulation and corrosion resistance).

How is High-Quality Lacquered Aluminum Foil Manufactured?

1. Material Selection & Degreasing: Using ultra-low pinhole rate alloys (e.g., 8011), subjected to strict cleaning and degreasing to ensure perfect paint adhesion.
2. Precision Coating: Utilizing gravure or roll coating technologies to apply liquid resin uniformly with "micron-level precision," strictly controlling the GSM.
3. High-Temperature Curing: Baking in a long oven at 200℃-250℃ to volatilize solvents, allowing resins to cross-link and form a dense, tough protective film.
4. Precision Slitting: After cooling, sharp blades precisely slit the foil into target roll widths, ensuring smooth, burr-free edges.

How to Judge the Quality of Lacquered Aluminum Foil?

A Buyer’s Guide to Avoiding Pitfalls:

1. Coating Adhesion: The lacquer must not peel off, ensuring no physical delamination or leakage during heat sealing.
2. Heat Seal Strength: Should reach 7-15 N/15mm and above. It must seal tightly while remaining easily peelable (for specific applications).
3. Minimal Solvent Residue: Must be completely volatilized with no odor, guaranteeing food and pharmaceutical safety.
4. Pinhole Rate Control: Strict control over the substrate's pinhole count to achieve a 100% physical barrier.
5. Coating Consistency: Uniform thickness from edge to center, ensuring a high yield rate on customers' automated packaging lines.

Lacquered Aluminum Foil & Sustainability

• Infinite Recycling: Aluminum can be 100% recycled infinitely. Surface coatings burn up in the recycling furnace, converting into thermal energy.
• Ultimate Lightweighting: Replacing thick plastic barrier layers with ultra-thin foil significantly reduces packaging weight and transportation carbon footprint.
• Water-Based Coating Trend: Introducing eco-friendly water-based coatings to replace solvent-based ones, eliminating VOC (Volatile Organic Compounds) emissions at the source.

Why Choose Worthwill?

Packaging is more than just a shell; it is a commitment to "safety and quality" for consumers. As a leading global provider of aluminum deep-processing solutions, Worthwill offers you:

• Strict Compliance: Our coating systems are FDA and SGS certified, and our pharmaceutical foils meet rigorous GMP production standards.
• Full-Matrix Customization: From 0.015mm to 3.0mm, whether you need heat-seal lacquers for various plastics or proprietary brand colors, we provide precise customization.
• Rigorous Quality Control: Fully automated online defect detection ensures flawless coating uniformity and heat-sealing performance for every roll.

Upgrade Your Packaging Solutions Today!

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