Electrolytic Tinplate (ETP) & TFS / ECCS Steel for Bottle Caps & Closures
Global direct manufacturer and ISO-certified supplier of prime Electrolytic Tinplate (ETP/SPTE) and Tin-Free Steel (TFS/ECCS) coils & sheets for crown corks, lug twist-off caps, roll-on pilfer-proof (ROPP) caps, and jar closures. Engineered with superior lacquer adhesion, deep stamping formability (T3 / T4 / DR7.5), and optimal tin coating for beverage and food processing lines.
Figure: Precision Slit Tinplate & TFS Coils / Cut Sheets for Beverage Crown Caps and Twist-Off Lug Closures
1. Cap & Closure Steel Specifications: ETP vs. TFS (ECCS) Matrix
For bottle cap and closure manufacturing, material flatness, consistent temper hardness, and high lacquer adhesion are crucial to prevent coating peeling during high-speed stamping. Explore our core technical specifications below:
| Closure Application | Base Material | Thickness (mm) | Temper Grade (HR30T) | Coating Weight / Finish |
|---|---|---|---|---|
| Beer Crown Corks (26mm) | ETP / TFS (ECCS) | 0.21mm – 0.24mm | T4 / TH58 (58±3) / DR7.5 | 2.8/2.8 g/m² ETP or Cr 50-140 mg/m² TFS (Stone) |
| Twist-Off Lug Caps (38-82mm) | ETP (MR Steel) | 0.17mm – 0.22mm | T3 / TH55 (55±3) | 2.8/2.8 or 5.6/5.6 g/m² + Organosol / Epoxy Lacquer |
| Deep-Drawn Jar Caps | ETP (Type L / MR) | 0.20mm – 0.25mm | T2.5 / T3 (53-56) | Bright / Stone Finish with High Stretchability |
| Aerosol Cone & Dome Tops | ETP (MR / SPCC) | 0.28mm – 0.38mm | T3 / T4 (55-60) | 5.6/5.6 g/m² Heavy Tin (Pressure Resistant) |
2. Precision Stamping & Lacquering Readiness for Cap Makers
💎 Exceptional Lacquer Adhesion
TFS (Tin-Free Steel) provides 100% rust-free surface bonding with internal BPA-NI gold epoxy, organosol, and PVC plastisol sealing liners, preventing beer and carbonated drink leakage.
📏 Strict Thickness & Earring Tolerance
Continuous annealing (CA) ensures minimal earring ratio (< 2.5%) during high-speed multi-cavity press stamping at speeds exceeding 1,200 caps per minute.
🚢 Integrated Packaging Sourcing
Explore our full line: Master Tinplate Sheet Manufacturer and Tinplate for Easy Open Ends & Lids for container consolidation.
3. Technical FAQ: Tinplate & TFS for Bottle Caps & Closures
Q1: Is TFS (Tin-Free Steel) or ETP better for crown corks manufacturing?
TFS (ECCS) is widely preferred for beer crown corks because the chromium/chromium oxide layer provides superior organic coating and ink adhesion at a lower raw material cost than tinplate. ETP is preferred when high metallic shine or specific welding is required.
Q2: What is the standard packaging to prevent edge damage and rust during sea freight?
All tinplate and TFS cut sheets are wrapped with VCI anti-rust paper, fully enclosed in corrugated metal covers, and strapped on solid fumigated wooden pallets (1.5-2.0 MT per pallet) with silica gel desiccant bags.