Hot Products
0102030405
China Electric Tinplate Steel Coil Suppliers Factory - SPCC MR Grade, Various Tempers, 0.15-0.70mm Thickness, Bright & Matte Finish
Description
Tinplate coil refers to sheet steel that is coated with tin. This material is commonly used in food and beverage packaging, as well as aerosol cans, paint drums and other end products.
💡
QINGDAO SINCERELY STEEL offers innovative solutions for electrolytic tinning line (ETL) and electrolytic chroming line (ECL) processes that increase tin protection. This includes chrome-based and chrome-free formulations.
Cleaning
The electro-tinning process requires particularly clean surfaces. Henkel provides a portfolio of strong alkaline cleaners to deal with residues from the rolling operation, such as oil and iron.
QINGDAO SINCERELY STEEL products cover all applications, from easy-to-use one-component liquid cleaners through to more sophisticated systems where surfactants are dosed separately to boost cleaning efficiency on demand.
⚙️
Our products are applied by dipping the strip into a solution, via spray or brush mode, and in electrolytic processes. Our range of Foam Fighter additives are also popular for use in electro-tinning lines.
Passivation
Currently, most passivation processes that take place after electro-tinning (ETL) still involve technologies containing Chromium VI. However, this substance is expected to be banned under REACH regulations in the coming years.
For this reason, chrome-free technologies for tinplating are gaining popularity. QINGDAO SINCERELY STEEL products are used to enable electro-tinning processes with chrome-free solutions for passivation of the tin. These are known as Chrome-Free Passivation Alternatives (CFPA), and they empower our customers to stay ahead of this regulatory trend.
Coating Mass / Coating Weights
There are two types of coating mass:
- Equally Coated Mass: Both sides have the same mass of tin coating.
- Differentially Coated Mass: One side is more heavily coated than the other.
| Classification | Type of Coating | Designation of Coating Mass | Nominal Coating Mass (g/m²) | Min Average Coating Mass (g/m²) | Former Designation |
|---|---|---|---|---|---|
| SPTE Tinplate | Equally coating | 2.8/2.8 | 2.8/2.8 | 2.45/2.45 | #25 |
| 5.6/5.6 | 5.6/5.6 | 5.05/5.05 | #50 | ||
| 8.4/8.4 | 8.4/8.4 | 7.55/7.55 | #75 | ||
| 11.2/11.2 | 11.2/11.2 | 10.1/10.1 | #100 | ||
| Differentially coated | 5.6/2.8 | 5.6/2.8 | 5.05/2.45 | #50/25 | |
| 8.4/2.8 | 8.4/2.8 | 7.55/2.45 | #75/25 | ||
| 8.4/5.6 | 8.4/5.6 | 7.55/5.05 | #75/50 | ||
| 11.2/2.8 | 11.2/2.8 | 10.1/2.45 | #100/25 | ||
| 11.2/5.6 | 11.2/5.6 | 10.1/5.05 | #100/50 | ||
| 11.2/8.4 | 11.2/8.4 | 10.1/7.55 | #100/75 |
Frequently Asked Questions
What is tinplate coil and what are its main uses?
Tinplate coil is sheet steel coated with a thin layer of tin. It is primarily used for food and beverage packaging, aerosol cans, and paint drums due to its protective properties.
Why is the cleaning process critical in tinplate production?
Electro-tinning requires an extremely clean surface. Specialized alkaline cleaners are used to remove residues like oil and iron from the rolling process to ensure proper tin adhesion.
What is the difference between ETL and ECL processes?
ETL stands for Electrolytic Tinning Line, used for applying tin coatings. ECL stands for Electrolytic Chroming Line, used for chrome-based protection. Both are essential for high-quality packaging steel.
What is CFPA in tinplate passivation?
CFPA stands for Chrome-Free Passivation Alternatives. These are environmentally friendly solutions that replace Chromium VI technologies to meet REACH regulatory standards.
How do I choose between Equally and Differentially coated tinplate?
Equally coated tinplate has the same tin thickness on both sides, while differentially coated tinplate has a heavier coating on one side, often used when the internal and external environments of a can require different levels of protection.
How are the cleaning solutions applied to the steel strip?
Solutions can be applied through dipping the strip, spraying, brushing, or via electrolytic processes, depending on the specific line requirements and the desired cleaning efficiency.