RT Journal Article ID 750b2f070ae649de A1 Giles, D. Ken A1 Downey, Daniel A1 Scher, H. A1 Winetzky, D. A1 Becker, T. A1 Hogue, J. T1 SUPPRESSION OF AEROSOL GENERATION DURING SPRAYING AND DEPOSITION OF CONSUMER PRODUCTS JF Atomization and Sprays JO AAS YR 2005 FD 2005-08-01 VO 15 IS 4 SP 423 OP 438 AB This study investigated droplet-size spectra and aerosol production from consumer products dispensed by disposable trigger sprayers for deposition on household surfaces. A strategy was devised to reduce the generation of small, mobile droplets through nozzle selection and manipulation of fluid properties. Parametric experiments with a generic laundry stain remover ("prespotter"), five spray dispenser designs, and four concentrations of a long-chain polymer were conducted. Surface tension of the test formulations ranged from 0.0350 to 0.0365 N/m. Shear viscosities ranged from 258 to 165 cps (shear rate of 7.5 s−1) and 66 to 48 cps (shear rate of 75 s−1). Polymer concentrations ranged from 0.00% to 0.10% w/w. Elongational viscosity characteristics were measured using a modified flow technique modeled after R. W. Dexter [14]. Droplet size spectra of the spray discharged from dispensers were measured with a laser-diffraction system. Design of the trigger spray nozzle significantly affected the droplet size spectra. For all trigger sprayers studied, addition of polymer to the spray formulation significantly reduced the generation of aerosol droplets. Mass transfer studies confirmed that addition of polymer reduced airborne spray aerosols by 86% to 94%. Similarly, addition of the polymer reduced the generation of mobile aerosols from spray impaction on target surfaces by 47−98%, depending on nozzle design and target surface characteristics. PB Begell House LK https://www.dl.begellhouse.com/journals/6a7c7e10642258cc,1dd77f252e8fa43e,750b2f070ae649de.html