Tinplate Steel Coils For Food Cans
Tinplate steel is a non-toxic, tasteless, and odorless metal that can be used in food cans. Its barrier properties protect food from impurities, bacteria, moisture and light. It is also 100% recyclable and safe for food contact.
Tinplate is made into coils that can be cut, welded or machined for various applications. It is available in a variety of finishes and temper grades.
Bright Finishes
Whether it’s for food or other uses, tinplate is highly durable. The metal provides a barrier that protects products from impurities, bacteria, light and odours. The tin coating is also non-toxic and easy to recycle. It is available with a highly reflective bright finish or as a non-reflective matte surface and is very formable, drawable, weldable and a great base for lithography and organic coatings.
In order to produce tinplate, strip steel is cleaned in a pickling solution and then fed into tanks where commercially pure tin is electrolytically deposited on both sides. The tin layer is then rolled thin to provide the necessary strength and corrosion resistance to make it a suitable material for making cans.
The coated steel is then side trimmed and inspected for quality control before going to the melting tower tinplate steel coils for food cans where it is heated by induction coils until the tin melts and reflows uniformly to a bright or shiny appearance. The tin layer can be deposited thicker on one side than the other to create differentially coated tinplate.
The tinplate then passes through a rolling mill where it is tempered and annealed to give it a high level of strength, good ductility and toughness and a good surface for printing. It can then be used to make food cans, closures, small and large diameter can ends, and bodies.
Corrosion Resistant
Metal packaging has been used in the food industry for a long time and its advantages are numerous. It is hygienic, airtight, strong and resistant to shocks. The tin coating also protects the food from impurities, bacteria, light and odours. It is also environmentally friendly since tin cans are 100 % recyclable.
The tin plate steel used in metal cans is a cold-reduced, low-carbon steel strip coated on both sides with commercially pure tin. It has a beautiful metallic luster and excellent properties in corrosion resistance, solderability and weldability. It is also highly abrasion resistant and is easy to clean.
During the manufacturing process, the steel is rolled through multiple pairs of rolls in order to reduce its thickness and make it even. The roll temperature Annealed Steel Strip has to be higher than the recrystallization temperature of the metal in order to achieve this.
Next, the tin is applied to both sides of the strip by electrolytic deposition. The steel then undergoes flow melting, a thermal treatment above the tin’s melting point, and rapid quenching in water to form a tin iron compound (FeSn). It is then passivated in a sodium dichromate solution, which gives it better corrosion resistance, followed by oil treatments, which make the tin plates resistant to scratches. The tin plate is then passed through container forming machines.
Lead-Free
Tinplate is the material of choice for food cans and other metal packaging, as it provides excellent sealing and preservation properties. It also offers light protection and sturdiness. Moreover, it can be printed on with high-definition and attractive designs. It is widely used in the production of beverage and food containers, aerosol cans, paint drums and other end products.
Tin-plated steel is produced on an electrolytic tin line by putting soft, low-carbon steel in the form of a strip through cold rolling and then cleaning, annealing, skin passing, and electrolytic tinning. This process allows the steel to be tinned on both sides without affecting its mechanical strength. The tin plate can then be cut and bent to produce the desired shape.
Henkel’s portfolio of strong alkaline cleaners for tinplate coils is aimed at the tinplate industry to deal with residues caused by the tinplating and chrome-based processes that increase tin protection. These cleaners range from easy-to-use one-component liquid cleaners through to system-based solutions where surfactants are dosed separately.
Lead is a highly toxic element, and it is linked to various health problems, including mental impairment, learning disabilities, digestive issues and organ failure. For this reason, manufacturers have been switching to lead-free metals, such as brass and zinc, which offer similar qualities as lead but without the risk of poisoning.
Customizable
Tinplate coils for food cans can be customized with printed or silk-screened digital images. These methods make the coils attractive and durable, as well as more versatile for a variety of applications. They are also rust-resistant and resistant to cold or heat, which makes them ideal for shipping and storage. Tinplate has great rigidity, which makes it more durable and safer for high-impact applications.
Tin plate is an excellent material for the manufacture of cans, beverage and aerosol containers, and industrial parts. It is a light-gauge steel with high corrosion resistance and excellent formability. It is also a good choice for food cans because it has great barrier properties, which protect the contents of the package from contamination.
The base metal used to make tinplate is a low-alloy, high-yield strength steel. It is typically produced using hot rolling or cold rolling techniques. After hot-rolling, the steel is cold-reduced to a thinner gauge and then annealed. Cold-reduced and annealed steel is much tougher than hot-rolled, but it is still very ductile and can be formed to a variety of shapes.
The tinplate can be coated either electrolytically or by the hot dip process. Coils that are coated electrolytically are called tinplate and have a lustrous metallic finish. The tin coating is applied to the tinplate by flowing molten tin onto the surface of the strip steel through an electrolytic tank.
