Guide to Aerosols
The Bag-on-Valve system consists of an aerosol valve with a welded bag. The product is placed inside the bag while the propellant is filled in the space between bag and can. The product is dispensed by the propellant simply squeezing the bag, thus pushing the contents out of the can.
Compared to traditional spray technology (and other alternative packaging) Bag-on-Valve has several benefits, for manufacturers, consumers as well as the environment.
The Bag-on-Valve uses compressed air instead of a liquid gas (hydrocarbons) to propel the product out of the aerosol can. The Bag-on-Valve is a simpler package than conventional aerosol with the exception that it does not require all the production and safety expense associated with conventional aerosol production.
Examples of these expenses would be the gassing house, propellant tank farms and in some cases the use of a water-bath to meet DOT regulations. The only limitation to using the Bag-on-Valve would be with a product that requires the hydrocarbon to dissolve or thin the product.
HOW IT WORKS
1. The can has a Bag on Valve unit placed in it.
2. Compressed air is then added to the can around the BOV unit.
3. The BOV unit is crimped onto the can sealing the compressed air inside.
4. The product is then injected through the valve of the BOV unit. As the product fills the bag the volume remaining in the can is reduced, further increasing the pressure of the compressed air sealed in the can.
5. An actuator is installed to finish the package. When the actuator is pressed, the product is delivered at a consistent pressure and spray pattern.
A few Benefits of the Bag-on-Valve Package:
1. Uses only pure air to propel the product.
-No harmful or flammable propellants
-Optimized for oxygen sensitive products
2. Product is isolated in an air tight bag inside the can.
-Product is not contaminated by propellant.
-Sterilized products remain sterile.
-Formula does not have to change to accommodate propellant.
3. Can be sprayed at any angle (even upside down).
4. 100% product evacuation from can (no waste).
5. Continuous pressure and spray pattern from beginning to end.
6. Reduced spray noise and non-chilling product discharge
7. Can be used with standard actuators, corresponding to the product features, and with standard aerosol cans (aluminum or tinplate)
8. Standard requirement for gel products
9. Use of compressed air as an especially environment-friendly (Green) propellant
Examples of Bag-on-Valve Products:
Sunscreens - Self Tanning Products - Lotions - Eye, Ear and Nose Products - Air Fresheners
Fire Extinguishers - Self Defense Products
Car Polish - Chrome Cleaner - Tire Cleaner
Specialty Gel Type Products Mixed with Isopentane
Topical Foams - Shave Gel - Medical Products - Hair Mousse