Aerosol cans are essential packaging solutions for industries like cosmetics, household chemicals, automotive products, and more. But before they’re filled with products, they start as raw materials transformed into precision-engineered containers. At Guangzhou Mijia Aerosol Can,we specialize in supplying high-quality empty aerosol cans for global manufacturers. Let’s explore how they’re made.  

1. Aerosol Can Material Selection: Tinplate VS Aluminum

Empty aerosol cans are typically made from:  

Tinplate(tin-coated steel): Strong, cost-effective, and widely used for industrial products.  

Aluminum:Lightweight, rust-resistant, and ideal for cosmetics, pharmaceuticals, and food-grade products.  

The choice depends on the product’s requirements (pressure resistance, corrosion resistance, weight, and cost).  

2. Aerosol Can Manufacturing Process

Step 1: Metal Sheet Cutting & Cup Formation 

- Large metal coils are cut into small discs.  

These discs are pressed into shallow cups using a mechanical or hydraulic press.  

Step 2: Deep Drawing – Shaping the Can Body

- The cups are stretched and thinned in multiple stages to form a seamless cylindrical can.  

This ensures no weak seams, critical for holding pressurized contents.  

Step 3: Wall Ironing (For Aluminum Cans)

- Aluminum cans undergo wall ironing to achieve uniform thickness.  

- Steel cans may skip this step, depending on design.  

Step 4: Washing & Drying

- The formed cans are cleaned to remove lubricants and metal residues.  

- Ensures a clean surface for coating and printing.  

Step 5: Necking & Flanging

- The top of the can is narrowed (necked) to fit the valve.  

- A flange is added to create a secure seal for the valve assembly.  

Step 6: Internal Coating (Lacquer Application)

- A protective epoxy or polymer lacquer is sprayed inside to prevent corrosion.  

- Critical for products like paints, chemicals, or food-grade aerosols.  

Step 7: External Printing & Decoration

- High-speed printing applies branding, labels, and safety warnings.  

- Options:Offset printing, UV printing, or shrink sleeves for premium designs.  

Step 8: Quality Testing

- Leak testing (pressure checks)  

- Dimensional accuracy (height, diameter, valve fit)  

- Coating integrity(to prevent rust or chemical reactions) 

Why Choose Guangzhou Mijia for Empty Aerosol Cans?  

✔ Global supplier with more than 10 years of experience in aerosol packaging  

✔ Custom sizes & designs(50ml to 1000ml+ cans)  

✔ Compliant with international standards(DOT, EU, REACH)  

✔ Sustainable options (recyclable materials, eco-friendly coatings)  

✔ OEM/ODM services (private labeling, custom shapes, and valve options)  

Applications of Our Empty Aerosol Cans

- Cosmetics:Hairsprays, deodorants, shaving foams  

- Household:Air fresheners, cleaning sprays, disinfectants  

- Automotive:Lubricants, brake cleaners, degreasers  

- Industrial:Paints, adhesives, coatings  

As we know that aerosol can includes external printing and internal coating, which are both of great significance to your products. But what are the functions of the internal coating? Let's go through this article to know about more.

1. Importance of internal coating: The main function of the internal coating of aerosol aluminum cans is to protect the internal surfaces from corrosion by aggressive chemicals contained in the filler. Besides, the internal coating also prevents direct contact between the filling and metal, thus extending the shelf life and ensuring the safety of the product.

2. Selection of internal coating materials: Materials of the internal coating is essential to ensure the safety and durability of aerosol cans. Commonly it includes epoxy, organic solvents, polyphthalamide phthalimide. And each of which has different advantages and limitation. For example, epoxy has good processability and chemical resistance while polyphthalamide phthalimide has particularly excellent chemical resistance.

3. Production process: The production process for aluminum aerosol cans consists of a number of steps, including the manufacture of the can body, the application of the internal coating, drying, and quality testing. The internal coating technology is the key link which usually uses an airless pump nozzle system to spray the coating onto the inner surface of the rotating can body, then goes to drying and curing.

4. Testing: The internal coating of aerosol cans is subjected to a series of performance tests to ensure its quality and safety. It includes appearance quality, dimensions, weld filler integrity, internal and external coating adhesion, external coating hardness, airtightness performance, deformation pressure and burst pressure testing.
5.  Market and technology trends: As the market develops and technology advances, the interior coating technologies of aerosol can are constantly developing. For example, water-based modified epoxy resin coatings are favored for their environmental performance. At the same time, market demands for lightweight and high-performance aerosol cans is also driving the development of related technologies.

All in all, ensuring the quality of the internal coatings can help improve the shelf life and safety of the aerosol cans. In MIJIA, various internal coatings are available for your aeroosl products. Tell us what you need, we do for you!

1.Stability & Compatibility of aerosol tin can

For any aerosol products, we should first select the cans according to the type of product, the characteristics of the formula to do the compatibility & stability test to ensure the stability of the product. Only through the stability of the test can we let the product into the market.

 

2.Security of aerosol tin can

It Includes the safety of use, pressure safety, environmental safety, safety of independence and the percentage of contents in a full aerosol tin can, etc.

 

3.Comfort of use of aerosol tin can

Any products after production and selling, it will be used by the final consumer. Besides, the comfort of use, ergonomics, spray effect, fragrance concentration, etc., related to the permanence of the existence of the product.

4.The economics of aerosol tin cans

Excessive use of packaging materials, in fact, is type of a waste. Therefore, the choice of packaging materials is an environmental protection.

5.Aesthetic appeal of aerosol tin can

Many consumers, especially cosmetics are outlook picker. Therefore, the first impression often determines the success of the products. And we also need pay more attention to the combination of appearance setting and the aesthetic needs of appropriate groups.