Abstract
Most of the current universal consumer aerosol products using high viscous product such as cooking oil, antiperspirants, hair removal cream are primarily used LPG (Liquefied Petroleum Gas) propellant which is unfriendly environmental. The advantages of the new innovative technology described in this paper are: i. No butane or other liquefied hydrocarbon gas is used as a propellant and it replaced with Compressed air, nitrogen or other safe gas propellant. ii. Customer acceptable spray quality and consistency during can lifetime iii. Conventional cans and filling technology There is only a feasible energy source which is inert gas (i.e. compressed air) to replace VOCs (Volatile Organic Compounds) and greenhouse gases, which must be avoided, to improve atomisation by generating gas bubbles and turbulence inside the atomiser insert and the actuator. This research concentrates on using “bubbly flow” in the valve stem, with injection of compressed gas into the passing flow, thus also generating turbulence. The new valve designed in this investigation using inert gases has advantageous over conventional valve with butane propellant using high viscous product (> 400 Cp) because, when the valving arrangement is fully open, there are negligible energy losses as fluid passes through the valve from the interior of the container to the actuator insert. The use of valving arrangement thus permits all pressure drops to be controlled, resulting in improved control of atomising efficiency and flow rate, whereas in conventional valves a significant pressure drops occurs through the valve which has a complex effect on the corresponding spray.
Highlights
There are a number of technical challenges in replacement of the consumer aerosol valve using conventional propellant with safe gases such as air and nitrogen
Ideally the new consumer aerosol valve design should be capable of performing in a similar way to current conventional aerosol valves, and certainly have better spraying performance for a wide range of high viscous products
This Section provides some qualitative spray performance with using some different high viscous products to show the capability of this new design valve
Summary
There are a number of technical challenges in replacement of the consumer aerosol valve using conventional propellant (such as butane) with safe gases such as air and nitrogen These challenges have limited their application in the market, they have environmental advantages: i. Effervescent is the process of various actively introducing gas bubbles into a liquid flow, immediately upstream of the exit orifice, thereby forming a two-phase flow. These are of interest due to their potential for using a small flow of atomising gas to produce a very fine spray [1 and 2]. Asumin [7] designed atomiser inserts using inert gases for domestic aerosols which will be discuses in details
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