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Aerosol Spray Cans - Term Papers

Aerosol Spray Cans

Spray cans produce an aerosol, the technical term for a very fine spray.
They do this by means of a pressurized propellant, which is a liquid that boils
at everyday temperatures. Inside the can, a layer of gaseous pressure increased,
and eventually it becomes so high that boiling stops. when the nozzle is pressed,
the gas pressure forces the product up the tube in the can and out of the nozzle
in a spray or foam. The propellant may emerge as well but, now under less
pressure, it immediately evaporates.
First patented in the US in 1941, aerosol spray cans have been used as
convenient packages for an ever increasing range of products including paints,
insecticides, and shaving cream to name ...

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hole which
leads up through the stem to the nozzle in the button. This allows the product
to be forced up the dip tube by the gas pressure in the can. The nozzle is
shaped to give a spray or a continuous stream.
To produce a fine mist, a propellant is used which mixes with the
product. The two leave the nozzle together and the propellant evaporates a soon
as it reaches the air, breaking the product in to tiny droplets. The same
technique used with a more viscous liquid and a wider nozzle results in a foam.
For a continuous stream of liquid or more viscous material, a nonmixing
propellant is used, and the dip tube reaches into the product.
The widespread use of aerosol cans using Freon as the propellant led
scientists to believe by the late 1970s that the ozone layer in the upper
atmosphere, which filters out harmful Ultraviolet radiation from the sun, could
be destroyed by the large quantities of fluorocarbons in the gas being release
into the air. Federal controls were ...

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Aerosol Spray Cans. (2004, November 13). Retrieved November 23, 2024, from http://www.essayworld.com/essays/Aerosol-Spray-Cans/17415

"Aerosol Spray Cans." Essayworld.com. Essayworld.com, 13 Nov. 2004. Web. 23 Nov. 2024. <http://www.essayworld.com/essays/Aerosol-Spray-Cans/17415>

"Aerosol Spray Cans." Essayworld.com. November 13, 2004. Accessed November 23, 2024. http://www.essayworld.com/essays/Aerosol-Spray-Cans/17415.

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PAPER DETAILS

Added: 11/13/2004 05:16:01 AM
Category: Science & Nature
Type: Premium Paper
Words: 583
Pages: 3

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