aerosol dispenser

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aerosol dispenser,

device designed to produce a fine spray of liquid or solid particles that can be suspended in a gas such as the atmosphere. The dispenser commonly consists of a container that holds under pressure the substance to be dispersed (e.g., paints, insecticides, medications, and hair sprays) and a liquefied gas propellant. When a valve is released, the propellant forces the substance through an atomizer and out of the dispenser in the form of a fine spray. These devices are more properly termed spray dispensers rather than aerosol dispensers because the particles of the dispersed substance are usually larger than the particles of a true aerosol (see colloidcolloid
[Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal system, colloidal solution, or colloidal dispersion.
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), such as a fog or a smoke. FreonFreon
[trade name], any one of a special class of chemical compounds that are used as refrigerants, aerosol propellants, and solvents. These compounds are haloalkanes, i.e., halogen derivatives of saturated hydrocarbons (see alkane).
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 was the most common aerosol propellant, but its use has been banned because it is believed to contribute to destruction of the ozone layerozone layer
or ozonosphere,
region of the stratosphere containing relatively high concentrations of ozone, located at altitudes of 12–30 mi (19–48 km) above the earth's surface.
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 of the stratospherestratosphere
, second lowest layer of the earth's atmosphere. The level from which it extends outward varies with latitude; it begins c.5 1-2 mi (9 km) above the poles, c.6 or 7 mi (c.10 or 11 km) in the middle latitudes, and c.10 mi (16 km) at the equator, and extends outward c.
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; common propellants now include propane, butane, and other hydrocarbons.
References in periodicals archive ?
An RCT where two aerosol sprays were randomly allocated to each breast was evaluated on 200 participants.
Modern-day, CFC-free aerosol sprays do however, emit volatile organic compounds (VOCs) that contribute to ground-level ozone, a key component of asthma-inducing smog.
In addition, production has been speeded considerably by the fast aerosol spray method.
POLICE were last night hunting two young boys who burned a girl's face by igniting an aerosol spray with a lighter.
Packaged in an aerosol spray can, users can more easily apply uniform film thickness across an entire work area.
He comes up with an invention which makes him a billionaire - he discovers an aerosol spray that makes dog faeces disappear.
Volatile organic compounds include organic solvents, certain paint additives, aerosol spray can propellants, fuels, petroleum distillates, dry cleaning products and many other industrial and consumer materials.
The new coating is an aerosol spray that turns into a thin film.
The adhesive is applied using the patented Scotch[R] Pro-Spray Applicator System, a lightweight pneumatic applicator that atomizes the high-solids, water-based adhesive to create a quick-tacking aerosol spray without using propellants.
One practical application is to use the particles as part of an aerosol spray. Nanomech, considered among northwest Arkansas' knowledge-based businesses to be one of the closest to achieving commercialization, hopes to initially market sprays that could put very hard substances in nano form on metal parts such as machine cutting tools.
What a hood Food colors come in aerosol spray cans -- spray paint for food.