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Combined with the analysis in the previous article, it can be seen that the production of metal cans does rely mainly on tinplate plate. Whether from the mechanical properties, chemical stability of the material, or from its anti-corrosion and decorative characteristics, tinplate plate is an ideal choice for making metal cans.

Tinplate packaging cans can effectively isolate air, moisture, light and harmful substances, and prevent oxygen from entering the can. Oxygen is the main factor causing coffee oxidation and flavor loss, and being able to prevent the entry of oxygen directly affects the shelf life of coffee.

Food and beverage liquid products Food and beverage liquid products are the most common application areas of tinplate can packaging. Liquid products such as juice, milk, carbonated beverages, and edible oil can be better protected and preserved when using tinplate can packaging.

The melting point of tin is relatively low, only about 232°C. When the temperature reaches or exceeds this level, the tin layer on the surface of tinplate sheet will undergo obvious physical changes and may even melt. This phenomenon makes tinplate sheet face greater limitations in high temperature applications.

Compared with paper packaging, tinplate packaging has superior hardness and durability. In food packaging that needs to be stored for a long time, tinplate's ability to resist compression and mechanical damage is particularly outstanding.

Many foods (such as canned food, juice, dairy products, etc.) contain more sensitive ingredients, such as vitamins, fats, etc. These ingredients are easily damaged by oxygen and ultraviolet rays. Therefore, metal tin packaging cans need to have anti-oxidation and anti-ultraviolet functions.

Many tinplate aerosol cans manufacturers have taken waste gas treatment measures during the production process. For example, volatile organic compound (VOCs) recovery devices and purification equipment are installed to treat or recycle the emitted harmful gases to reduce pollution to the atmosphere.

Common coating types for tinplate cans: 1. Anticorrosion coating 1.1 Epoxy coating 1.2 Polyester coating 1.3 Acrylic coating 2. Decorative coating 2.1 Paint coating 2.2 Printing coating 2.3 Varnish coating 3. Functional coating 3.1 Antibacterial coating 3.2 Anti-ultraviolet coating 3.3 Waterproof coating

The price of customized tinplate packaging cans is usually higher than wholesale packaging because it involves more design and production processes. Customized packaging requires a series of designs and productions according to the specific needs of customers, and the production quantity is usually small, so the unit cost is high.

Spray painting can not only effectively isolate the contact between oxygen and moisture in the air and the surface of tinplate sheet, but also prevent acidic substances or other food ingredients from corroding metal materials to a certain extent.