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The can is typically filled with a liquid mixture of propellant and payload. When the liquid temperature rises, the gas pressure increases. The dome space provides a buffer zone, allowing the gas to expand without overpressure or severe deformation of the can.

Tinplate aerosol can manufacturing process: 1. Raw material preparation: 2. Printing and coating: 3. Stamping: 4. Dome manufacturing: 5. Dimensional standardization: 6. Quality inspection process:

According to U.S. Code of Federal Regulations (CFR) 49 §173.306, metal aerosol cans must not exceed an internal pressure of 180 psig at 54.4°C (130°F), and the container must be able to withstand at least 1.5 times the thermal equilibrium pressure without rupture or deformation.

Testing Method: · Place the finished aerosol can in water; · Gradually inflate the can using a dedicated pressurizing device; · Record the pressure at which the dome permanently deforms or bursts. Judgment Criteria: Generally, a pressure of at least 1.2 MPa is required, with specific standards depending on the intended use.

The top and main body of an aerosol can are called: 1. The top structure is called the dome. 2. The transition between the dome and the can body is called the cone. The central cylindrical structure of the can, commonly known as the main "body," is called the can body. Therefore, a standard aerosol can can be divided into: · Body · Cone · Dome

Steps for printing patterns on tinplate sheets: Preparation: 1. Cleaning and degreasing 2. Primer coating 3. Drying treatment Selection of printing method: 1. Offset printing 2. Screen printing 3. Gravure printing 4. Flexographic printing Selection of ink: 1. Solvent-based ink 2. UV-curable (UV) ink 3. Water-based ink

Generally speaking, commercially available tinplate aerosol cans can withstand an internal pressure of about 12-18 bar, while the typical pressure at room temperature is usually 8-10 bar. This means that under normal conditions, the pressure of an aerosol can is usually lower than its tolerance limit, with a certain safety margin.

Candy cans need to have a certain hardness to protect the food inside, which requires the can body to be sturdy and avoid deformation during transportation and storage. Tinplate sheet has such characteristics. Its core is steel, which gives the can body excellent pressure resistance and hardness.

It is recommended to choose a vacuum sealed can with excellent sealing and light-proof properties for short-term storage of coffee powder; while coffee beans can maintain stability for a long time in a vacuum sealed can or metal can.

Food packaging grade tinplate sheet is not easy to release harmful substances at room temperature, but whether it will release heavy metal elements such as lead and cadmium under high temperature conditions is worrying. High temperature may decompose the metal surface coating, resulting in food contamination.