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Aerosol Spray Cans
Beginning of essay
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 no ....
Middle of essay
.... 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 introd.... |
| Number of words: 583 |
Approximate pages: 3 |
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