Aerosol packaging is an independent distribution system with three main elements:
Active ingredients (soap or disinfectant, etc.)
Inert or inactive ingredients (water)
Propellants: (hfa 134a,HFA-134 Chemical Name: Pharmaceutical Excipients Tetrafuoroethane)
A propellant such as hfa hydrofluoroalkane is a gas compound that pushes a product out of a container and produces a spray or foam. In most cases, propellants can also act as solvents to maintain the appropriate strength of the product. In the United States, the most common propellant is naturally occurring hydrocarbons. Some products (about 10% of today's aerosols) use compressed gases such as carbon dioxide and nitrous oxide as propellants.
The last element is a container, usually a steel or aluminum can. Leak-proof protection protects the product from contamination and evaporation.
All of these parts work together on simple scientific principles. Aerosol packaging is a dense pressurized container. Pressing the actuator button will open the valve. Since the pressure outside the tank is less than the pressure in the tank, the propellant expands, pushing the appliance into the drain pipe and draining through the valve. The system allows products to be applied in a variety of ways. In fine fog, metering sprays provide only the right amount of foam, foam or even long-distance spray.