To understand aluminum aerosol cans, you must first understand aerosols and aerosol cans.

Here is a detailed introduction, I hope it can help everyone.

1. Aerosol

The concept of aerosol originated from Lynde's proposal in 1862 to use a saturated solution of gas to prepare pressurized packaging. It was not until 1926 that Norwegian chemical engineer Erik Rothheim used liquefied gas to prepare the prototype of a modern aerosol. In the past, most people used pesticides. With the progress of the times, there are more and more aerosol products, and their effects are becoming more and more obvious.

So, what is an aerosol? Aerosols refer to medicines, emulsions or suspensions that are packaged together with a suitable propellant in a pressure-resistant container with a special valve system. When used, the contents are sprayed out in the form of mist with the help of the pressure of the propellant. Preparations for disinfection by inhalation into the lungs or sprayed directly into the mucous membranes, skin and spaces of the oral cavity. Its application scenarios include: pharmaceuticals (spray inhalation drug delivery), cosmetics (more common such as hydrating sprays), daily chemicals (spray paint), building materials (foam), industrial products (cleaning agents, release agents), Food (spray cooking oil, cream spray), automobile (car interior cleaning agent), etc.

2. Aerosol cans and their working principles

1. Aerosol cans come in various sizes and shapes and serve as containers for various aerosols.

At present, what we see more often are tinplate cans (such as self-spray paint cans, styrofoam cans, insecticide cans...); there is also an aluminum bottle aerosol can (aluminum aerosol can), which Type products, also called binary sprays, have been widely used in product packaging in the past two years because they can be used to hold various materials, so now we see many different types of spray skin care products (such as lotions, gels, mousse Si, etc.). The old spray (that simply sprayed water) was called one-yuan spray.

The above sprays are all aerosol cans, which are pressure-resistant containers used to load materials. Their basic working principle is the same: through the expansion of one high-pressure fluid, another fluid is moved from Squeeze it out from the nozzle. The so-called fluid refers to any substance composed of freely flowing particles. It includes liquid substances (such as water flowing from a faucet) and gaseous substances (such as air in the atmosphere). Although there are weak binding forces between particles in a liquid, they are still able to move relatively freely. Because the particles are bound together, a liquid at constant temperature has a fixed volume.

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For details on how aerosol cans work, please refer to our previous article "How Do Aerosol Cans Work?"

2. Design features of aerosol cans

Some people may find out why the aerosol can is different from the cans we usually see, and why the bottom of the aerosol can is curved. In fact, there is a reason for this, mainly because of the following three characteristics:

①. Strengthen the structure of the can. If the can has a flat bottom, the pressure of the high-pressure gas may squeeze the metal bottom into an outward bulge. Curved tank bottoms have better structural integrity, like arches or domes in architecture.

②. Disperse pressure. With the bottom curved shape, the force exerted on the curved metal upper part is mostly distributed to the strong bottom edge of the can.

③. Make the product ingredients easier to consume. Draining a flat-bottomed jar is like sucking the last puddle out of a glass with a straw: You have to tilt the jar so the product doses collect under the plastic tube. With the curved bottom design, the last bit of product is concentrated in a small area on the bottom edge of the jar. This makes it easier to empty out all the liquid.

3. Why are aluminum aerosol cans becoming more and more popular?

1. Aluminum aerosol cans are easy to use and have very good results.

2. Aluminum aerosol cans are very light in weight, have good mechanical properties, come in various specifications, and have beautiful appearance, making them easy to carry around and use at any time.

3. Compared with aerosol cans made of other materials, aluminum aerosol cans can contain more materials inside.

4. Green and environmentally friendly, recyclable.