Aluminum Closure Sheets & Strips for ROPP Bottle Caps & Closures
Sino East Steel is a premier Chinese manufacturer and global exporter of high-precision Aluminum Closure Sheets, Slit Strips, and Coils (Alloy 8011 & 3105, H14/H16) engineered specifically for automated Roll-On Pilfer-Proof (ROPP) wine caps, spirits closures, olive oil pourers, and pharmaceutical tear-off seals. Featuring ultra-low earing rate (≤2.0%), flawless deep-drawing formability, and food-grade DOS lubricated or pre-lacquered / color-printed surfaces.
1. Aluminum Closure Sheet & Strip Technical Specification Matrix (8011 vs. 3105 vs. 5182)
Our closure stock is produced using continuous casting and precision cold rolling lines with automatic gauge control (AGC), ensuring tight thickness tolerances and zero surface pinholes:
| Alloy & Temper | Thickness (mm) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation A50 (%) | Earing Rate (%) | Primary Bottle Cap & Closure Applications |
|---|---|---|---|---|---|---|
| Alloy 8011 H14 / H16 | 0.17 – 0.25mm | 130 – 175 | 115 – 160 | ≥ 3.0% | ≤ 2.0% | Standard ROPP caps (28x15mm, 30x35mm), wine bottle screw caps, olive oil pourer closures |
| Alloy 3105 H14 / H16 | 0.18 – 0.24mm | 150 – 200 | 130 – 180 | ≥ 3.0% | ≤ 2.0% | Deep-drawn extra-long spirits closures (30x60mm for vodka/whisky), high-strength security caps |
| Alloy 8011 H14 (Medical) | 0.17 – 0.22mm | 135 – 170 | 120 – 155 | ≥ 3.5% | ≤ 1.8% | Pharmaceutical tear-off seals, sterile antibiotic vial flip-off caps (13mm, 20mm, 32mm) |
| Alloy 5182 H19 / 5052 | 0.20 – 0.28mm | 360 – 410 | 310 – 370 | ≥ 5.0% | ≤ 3.0% | Beverage can easy open ends (EOE B64 / CDL) and pull-ring tab stock |
2. Surface Pre-Treatment, Lacquering & Precision Coating Capabilities
DOS Food-Grade Lubricated
Pre-treated with electrostatic DOS or ATBC lubrication (3 – 5 mg/m²) to eliminate punch friction and die galling during high-speed multi-cavity press stamping.
Gold Epoxy & BPA-NI Lacquer
Internal epoxy-phenolic gold lacquer or Organosol BPA-NI (Non-Intent) resin tested against boiling water, pasteurization, and high-alcohol content without flaking.
High-Definition Multi-Color Printing
Supplied in customized base coats (white, clear, metallic gold, matte) and up to 6-color offset printing with high-gloss UV overprint varnish for premium spirits branding.
Looking for Steel Tinplate (ETP / TFS) for Crown Corks & Twist-Off Caps?
Sino East Steel supplies complete multi-material packaging raw materials. Compare our aluminum closure sheets with our electrolytic tinplate and tin-free steel (TFS) range: