There are 4 basic Aerosol Can Classifications. Necked-in, Straight Wall, Monoblock and Shaped. They can be made from Aluminum, Steel, Plastic and Glass. The propellant in these cans are either classified as Liquefied Gas, or Compressed Gas. The cans are made up of either 2 pieces or 3 pieces.
Both Aerosol Straight-wall and Necked-in Cans are used in the personal care, household, paints, automotive, insecticide, and industrial product industries. Shaped aerosols are cans that are used to differentiate brands in the retail environment while enhancing shelf appeal. Additionally a shaped bottom will make it easier to use up all of the product inside of the can.
You will see the difference in Straight-wall and Necked-in Cans by looking at the very top of the can which is where it is sealed (the rim). The Necked-in can will indent before going into the rim, and the Straight-wall will continue directly into the rim without any deviation. Both are durable, however necked-in cans are considered extremely durable.
Monoblock Aerosol Cans are 1-piece cans. The monoblock aerosol can is consumer-friendly and offer high standards of safety and hygiene with excellent properties for product integrity. They are produced with or without a cam rim. Suitable for use with all types of propellants and formulations.
Aerosol cans are made in various ways, normally from metals that can safely contain pressurized liquids and gases. Most everyday, household aerosols are made from a thin sheet of steel coated with another material to stop it rusting or reacting with the product or the propellant.
Traditionally the coating is tin, often applied by electroplating, which turns the steel into a material called tinplate. The tinplate is wrapped into a cylinder that has a top and a bottom welded on to ensure the can is completely leak proof.
Environmentally friendly cans are increasingly being made with plastic (polymer) linings instead of tin, which is often cheaper and makes them easier to recycle. Other cans are made by pressing a small lump of aluminum through a ring-shaped tool, called a die, so a cylinder forms from a single piece of metal.
The product labeling and instructions are placed onto the metal can by offset printing. Some aerosol "cans" are also made from glass—theoretically an ideal material (because it doesn't corrode or otherwise react with the product it's containing), but problematic given that it can break under high pressure or if it's knocked or dropped.
The Aerosol Can market size will grow and reach 11.9 billion by 2022 at a CAGR of 4.9%.
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