Material Composition & Structure Multi-Layer Lamination: Combines steel (SS 304/316, 0.1-0.5 mm thickness) for structural rigidity, polymer interlayer (PET/PP/PE, 0.05-0.2 mm) for adhesion and barrier properties, and aluminum foil (Al, 6-30 μm) for enhanced oxygen/moisture resistance. This hybrid structure achieves a total thickness of 0.15-0.8 mm with balanced mechanical and protective functions Surface Modification: Utilizes laser-textured metal surfaces or nano-silica coatings to enhance polymer-to-metal bonding strength, reducing delamination risk during deep drawing or forming processes Custom Printing Capabilities High-Fidelity Graphics: Supports 10-14 color rotogravure printing with ≤0.1 mm registration accuracy, enabling complex designs, brand logos, and regulatory symbols. Compatible with water-based and eco-solvent inks (REACH/ROHS compliant) Finish Options: Offers matte/glossy coatings, tactile embossing, and holographic effects for aesthetic differentiation and anti-counterfeiting Functional Performance Formability & Durability: Engineered for deep drawing (OSU formability ≥4.0) and puncture resistance (≥50 N) Withstands thermal cycling (-40°C to 121°C) without layer separation Barrier Properties: Oxygen transmission rate (OTR) ≤0.05 cc/m²/day and water vapor transmission rate (WVTR) ≤0.3 g/m²/day due to aluminum foil and polymer sealing Safety & Compliance Food/Medical Certifications: Complies with FDA 21 CFR §177.1520 (food contact), EU 10/2011, and ISO 13485 (medical packaging) Heavy metal migration <0.01 ppm Sustainability: GRS-certified mono-PP/PE variants with **≥30% recycled content and carbon footprint ≤1.5 kg CO/kg Product Specifications Physical Parameters Thickness Range: 0.15-0.8 mm (customizable layer ratios). Roll Dimensions: Core ID 76.2 mm/152.4 mm; max. roll length 5,000 m; weight ≤150 kg. Sheet Sizes: Pre-cut sheets 300×300 mm to 600×600 mm (±0.5 mm tolerance) Mechanical Properties Tensile Strength: ≥120 MPa (MD), ≥100 MPa (TD) (ASTM D882). Peel Strength (Interlayer): ≥9.5 N/25 mm (ASTM D3330) Elongation at Break: 3-8% (ASTM D3759). Printing & Processing Color Support: 10-14 rotogravure stations with ≤0.1 mm overlay error. Ink Adhesion: ≥95% retention after tape test (ASTM D3359). Heat Seal Strength: ≥35 N/15 mm at 130-160°C (ASTM F88) Barrier Performance OTR (23°C, 0% RH): ≤0.05 cc/m²/day (ASTM D3985). WVTR (38°C, 90% RH): ≤0.3 g/m²/day (ASTM F1249). Certifications & Safety Compliance: FDA 21 CFR §177.1520, EU 10/2011, ISO 13485, REACH SVHC <0.1%. Safety Limits: Heavy metals (Pb, Cd, Hg) <0.01 ppm; solvent residue ≤3 mg/m² (GB 9685)
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