Matte Finish Electrolytic Tin Plate (SPTE) in T4CA & T5CA Tempers for Premium Packaging
Product Description
Electrolytic Tin Plate (ETP), commercially designated as SPTE, is a cold-rolled steel sheet electrolytically coated with a uniform layer of pure tin. This specific product variant features a functional Matte Finish surface, engineered to provide superior paint and ink adhesion while offering a sophisticated, non-reflective aesthetic. Supplied in key industrial tempers—T4CA for balanced formability and T5CA for higher strength—this tinplate is the material of choice for manufacturing durable, high-quality packaging for food and beverages. Its excellent corrosion resistance, weldability, and deep-drawing performance make it ideal for producing cans for tuna, sardines, vegetables, fruits, aerosol products, and specialty beverages, ensuring content preservation and brand integrity.
Features & Characteristics
Functional Matte Surface:
The specially processed matte finish provides a microscopically textured surface, drastically improving the adhesion and durability of applied lacquers and decorative prints.Precision Temper Selection:
Available in T4CA (excellent toughness for complex draws) and T5CA (higher strength for rigid containers) tempers, allowing precise matching to specific can-making processes.Superior Barrier Protection:
The electrolytic tin coating offers robust, sacrificial corrosion resistance against acidic and alkaline food contents, extending product shelf life.Excellent Fabrication Properties:
Exhibits outstanding weldability and solderability, and is suitable for high-speed stamping, deep drawing, and bending operations without flaking.Prime Material Consistency:
Produced from MR and SPCC steel grades under controlled continuous annealing (CA), ensuring uniform mechanical properties and surface quality across coils and sheets.
Key Advantages
Utilizing this matte-finish tinplate translates to direct production benefits and enhanced final product quality. The superior coating adhesion reduces rejects due to print or lacquer peeling, saving costs. Its precise temper grades minimize material failure during forming, increasing production line efficiency and tool life. The material’s inherent strength allows for potential lightweighting (thinner gauges) without compromising can integrity. Furthermore, compliance with JIS, DIN, and ASTM standards ensures global acceptance and reliability for OEM and export-oriented packaging.
Technical Parameters Table
| Parameter | Specification |
|---|
| Material Type | Electrolytic Tin Plate (SPTE) / Tin Free Steel (TFS) |
| Base Steel | MR, SPCC, Prime Grades |
| Thickness | 0.15mm – 0.47mm |
| Standard Width | 600mm – 1020mm |
| Key Tempers | T4CA, T5CA, DR8, BA & CA Variants |
| Tin Coating Mass | 1.1/1.1 to 11.2/11.2 g/m² (Equal/Differential) |
| Surface Finish | Matte, Bright, Stone, Silver |
| Hardness Range | TS230-TS290, TH415-TH620 |
| Core Standards | JIS G3303, DIN EN 10203, ASTM, GB |
Frequently Asked Questions (FAQ)
Q1: What is the main application difference between T4CA and T5CA tempers?
A1: T4CA offers superior toughness and ductility, making it ideal for packaging requiring deep drawing or complex shapes (e.g., deep fish cans). T5CA provides higher strength and rigidity, better suited for containers needing enhanced resistance to denting or pressure (e.g., aerosol cans, certain beverage ends).
Q2: Why is a matte finish preferred for printed cans?
A2: The matte finish creates a larger effective surface area for ink or coating bonding. This results in more vibrant, scratch-resistant prints with excellent opacity and significantly reduces the risk of ink delamination during processing or storage.
Q3: Can this tinplate be used for beverage can bodies?
A3: Yes, especially the T5CA grade. It is suitable for manufacturing two-piece drawn and ironed (D&I) cans or three-piece welded cans for non-carbonated beverages, juices, and teas, providing excellent formability and corrosion resistance.
Q4: What is the "CA" in T4CA/T5CA, and is BA available?
A4: "CA" stands for Continuous Annealing, which yields consistent mechanical properties. We also supply Bright Annealed (BA) variants (e.g., T4BA), which have a brighter, glossier surface and slightly different forming characteristics. The choice depends on your specific aesthetic and production needs.
Q5: What is the minimum order quantity and can I get samples?
A5: The standard MOQ is 25 tons. We provide sample pieces for quality verification; a nominal fee may apply for customized specifications, which can be arranged through our sales team.
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