Processes Involving Spray Surface Impact

Nasr, G. G.; Yule, A. J.; Bendig, L.

doi:10.1007/978-1-4471-3816-7_5

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…In continuous flow valves as soon as the actuator is depressed, the spray comes out continuously until the actuator is released. In this investigation, two different domestic continuous flow aerosol valves are developed: the 'bi-valve' and the 'single gasket' [8,9]. The 'bi-valve' and 'single gasket' are developed to be mainly applicable for use on products such as deodorant, hairspray, airfreshener, insecticide and polish which are normally water or ethanol based with up to 1 cP viscosity.…”

Section: Novel Aerosol Valve Designsmentioning

confidence: 99%

“…The word 'domestic' and 'consumer' has been used throughout this paper interchangeably as normal practice which provides a same connotation. The inventive steps of the corresponding valve designs were initially filed with a number of the interlocking patents [8][9][10][11][12]. The overall aims of this study are to design consumer aerosol valves using inert gas propellants (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Next generation of consumer aerosol valve design using inert gases

Nourian

Nasr

Yule

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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The current global consumer aerosol products such as deodorants, hairsprays, air-fresheners, polish, insecticide, disinfectant are primarily utilised unfriendly environmental propellant of liquefied petroleum gas (LPG) for over three decades. The advantages of the new innovative technology described in this paper are: (i) no butane or other liquefied hydrocarbon gas; (ii) compressed air, nitrogen or other safe gas propellant; (iii) customer acceptable spray quality and consistency during can lifetime; (iv) conventional cans and filling technology. Volatile organic compounds and greenhouse gases must be avoided but there are no flashing propellants replacements that would provide the good atomisation and spray reach. On the basis of the energy source for atomising, the only feasible source is inert gas (i.e. compressed air), which improves atomisation by gas bubbles and turbulence inside the atomiser insert of 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. Using a vapour phase tap in conventional aerosol valves allows the propellant gas into the liquid flow upstream of the valve. However, forcing bubbly flow through a valve is not ideal. The novel valves designed here, using compressed gas, thus achieved the following objectives when the correct combination of gas and liquid inlets to the valve, and the type and size of atomiser ‘insert’ were derived: Produced a consistent flow rate and drop size of spray throughout the life of the can, compatible with the current conventional aerosols that use LPG: a new ‘constancy’ parameter is defined and used to this end. Obtained a discharge flow rate suited to the product to be sprayed; typically between 0.4 g/s and 2.5 g/s. Attained the spray droplets size suited to the product to be sprayed; typically between 40 µm and 120 µm.

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Section: Novel Aerosol Valve Designsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%