1. What is BOV (Bag-on-Valve) packaging?
Simply put, BOV (Bag-on-Valve) packaging is a type of aerosol packaging in which the active ingredient and the propellant are contained in two separate, isolated containers. Inside the canister, there is a separate pouch containing the active ingredient, and the space between the pouch and the canister is filled with a non-flammable gas—such as compressed air or nitrogen—which serves as the propellant. When used, the propellant presses against the pouch to force the product out; the propellant itself is not discharged.
Compared to Tube Valve packaging (where the product and propellant are mixed within the same canister), BOV (Bag On Valve) packaging is more expensive and involves a more complex manufacturing process, but it offers significant advantages in terms of safety, user experience, and product compatibility.
2. Why is BOV (Bag On Valve) packaging used?
(1) Greater Safety
Tube Valve packaging commonly uses flammable and explosive gases such as propane and butane as propellants, which are prone to explosion under high-temperature or high-pressure conditions and are therefore prohibited on airplanes. In contrast, BOV (Bag On Valve) packaging uses non-flammable nitrogen or compressed air as the propellant, making it safe even when exposed to direct flame, and significantly reducing risks during transportation and use.
(2) Better User Experience
Tube Valve packaging produces a poor atomization effect with strong impact, and the gas escaping during spraying creates a audible noise. BOV (Bag On Valve) packaging delivers a uniform, continuous nano-atomized mist that is gentler and finer, providing a more pleasant sensation upon skin contact and operating silently during spraying.
In Tube Valve packaging, the gas and product are mixed, so the two must be compatible, which limits product selection. In BOV packaging, the gas and product are separated; theoretically, any product can be used, allowing for more flexible formulation design.
(4) More Hygienic and Reduced Need for Preservatives
In BOV packaging, the product is contained in a sealed pouch and is completely isolated from air throughout the entire process, preventing contamination from reuse. As a result, formulations can contain fewer or even no preservatives, reducing skin irritation.
(5) High Utilization Rate, Virtually Zero Residue
Tube valve packaging often results in waste due to residue. BOV packaging allows for 100% product usage, with a utilization rate of over 98%.
(6) 360° Spray at Any Angle
Tube valve packaging contains sediment, requiring shaking before use, and the bottle must be held at a fixed angle during spraying. BOV packaging contains no sediment, allowing for immediate use and spraying from any angle without dead zones.
(7) More environmentally friendly
BOV packaging does not release propellants, reducing environmental pollution, and the aluminum cans are recyclable.
(8) Protects the product and ensures good compatibility
The product is isolated from the propellant, eliminating the risk of corrosion to the aerosol can and protecting the stability of active ingredients, resulting in higher biosafety.
