Aerosol Spray Can Essay, Research Paper
Spray tins produce an aerosol, the proficient term for a really
all right spray. They do this by agencies of a pressurized propellent, which
is a liquid that boils at mundane temperatures. Inside the can, a
bed of gaseous force per unit area increased, and finally it becomes so
high that boiling Michigans. when the nose is pressed, the gas force per unit area
forces the merchandise up the tubing in the can and out of the nose in a
spray or froth. The propellent may emerge every bit good but, now under
less force per unit area, it instantly evaporates.
First patented in the US in 1941, aerosol spray tins have been
used as convenient bundles for an of all time increasing scope of
merchandises including pigments, insect powders, and shaving pick to call
a few. The can is filled with the merchandise to be sprayed and the
propellent, a compressed gas such as butane or Freon. The gas is
partially liquefied by the force per unit area in the can, but there is a bed of free
gas above the liquid. As the can empties liquefied gas vaporizes to
make full the infinite.
The valve is normal held shut by the force per unit area in the can, and
by the spiral spring straight below the valve root. When the push
button is pressed, it forces the valve root down in its lodging,
bring outing a little a little hole which leads up through the root to
the nose in the button. This allows the merchandise to be forced up the
dip tubing by the gas force per unit area in the can. The nose is shaped to give
a spray or a uninterrupted watercourse.
To bring forth a all right mist, a propellent is used which mixes with
the merchandise. The two leave the nose together and the propellent
evaporates a shortly as it reaches the air, interrupting the merchandise in to
bantam droplets. The same technique used with a more syrupy liquid
and a wider nozzle consequences in a froth. For a uninterrupted watercourse of
liquid or more syrupy stuff, a nonmixing propell
emmet is used, and
the dip tubing reaches into the merchandise.
The widespread usage of aerosol tins utilizing Freon as the
propellent led scientists to believe by the late seventiess that the ozone
bed in the upper ambiance, which filters out harmful Ultraviolet
radiation from the Sun, could be destroyed by the big measures of
fluorocarbons in the gas being release into the air. Federal controls
were introduced to censor the usage of Freon, and other propellents are
now employed, notably butane which, nevertheless is perilously
flammable.
Among immature people in United States, conventional drug or
intoxicant maltreatment has given away-for an increasing figure of teen-
agers-to a pattern called & # 8216 ; snorting & # 8217 ; , inhaling chemicals found in
aerosol sprays and other common family points such as coffin nail
igniters, pigment dilutant, gasolene. Inhalant maltreatment is going
progressively common among immature middle-class adolescents. It is a
cheap, and sometimes lifelessly, bang.
Yoon, Byung
Period 1
Aerosol Spray Cans
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