®

Technology in a Can

About Aerosols

Aerosols were first invented in 1926 by a Norwegian, Erik Rotheim. He was after a better way of applying wax to his skis and found that a pressurised aerosol was the most effective delivery method.

Download Cartoons to Colour

 

 

However, it wasn't until after World War II that the aerosol became popular as the 'bug bombs' (pictured) that had saved many US soldiers from malaria infection during the Pacific War found their way into 'war surplus' stores.

The first aerosol produced in Australia is believed to be a can of "Mortein" (TM) flyspray in the early 1950's.

Pictured: a can of "Mortein" (TM) from the 1960's.

Today's aerosols are a sleek and modern form of packaging which consumers see as convenient and always ready to use, safe and suitable for a wide range of products.

There are many technical advantages to aerosols such as a long shelf life and an inability to be contaminated by bacteria or dust. The contents do not evaporate and the product's characteristics will not change over the lifetime of the product.

Aerosols can dispense a large variety of products from powders to gels and foams, pastes and liquids.

How Aerosols Work

As pictured, the product is disolved or suspended in a liquid solvent. A liquid gas usually is used as a propellant.

In a typical aerosol, some of the propellant exists as a gas under pressure above the product. This gas pushes down on the liquid, forcing it up through the dip tube and out the valve when it is opened. The liquid is a mixture of product and liquified gas.

As it is released, the gas evaporates from the liquid in the container causing constant performance and pressure within the aerosol.

   

When the liquid mixture is released from the aerosol, the liquid propellant becomes a gas and helps break up the product into a fine mist. In foams like mousse and aftershave, the liquid gas forms bubbles, making the product expand as it is released from the aerosol.

The amount of propellant in aerosols differs depending on the product. For example, for fine mists a larger amount is used than in foams etc.

For more information go to How Stuff Works or The Plain Man's Guide to Aerosols.

Other links are on our Links page

To download a listing of internet resources on aerosols click here

Nothing Delivers Quite Like An Aerosol!

The aerosol package has numerous advantages not duplicated by non-aerosol alternatives.

 

CONVENIENT - READY TO USE

Aerosols are always ready to use at the touch of a button.

Aerosols need no mixing or measuring.

SUITED TO A WIDE VARIETY OF PRODUCTS

Aerosols are ideally suited to:

  • producing fine space sprays such as air fresheners and insect sprays;
  • achieving even coatings such as paints, hair sprays and cooking sprays;
  • producing foams such as carpet shampoo, hair mousse and whipped cream;
  • reaching hard to get at places such as with automotive sprays, lubricants and crack & crevice treatments.

CAN DO THE DIFICULT AND THE UNUSUAL

Aerosols can dispense medicines or other products in doses as small as 50gm, they can jet product long distances - for example in garden or wasp sprays while one-shot (or "total release") valves can empty cans in one go.

TECHNICAL ADVANTAGES

Aerosol products have a long shelf life - this is important for sensitive materials like fragrances.

The product is hermetically sealed and can not become contaminated even when being used.

Aerosols are leak proof and won't spill or evaporate. They are easy to store and handy to use

.

© 2008 Aerosol Association of Australia Inc. -

Although every effort has been made to ensure the accuracy of the information in the publications and articles found in this website,
the Aerosol Association of Australia Inc. does not guarantee its correctness nor accept any legal responsibility.

"It’s OK to Spray" is a registered trademark of the Aerosol Association of Australia Inc.

Last Updated: 17 August 2010