Investigation of charged particle trajectories in electrostatic powder coating systems

Ang, M.L.; Lloyd, Philip Jd

doi:10.1016/0301-9322(87)90069-3

Cited by 16 publications

(2 citation statements)

References 6 publications

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“…There are a few reports that investigated the powder coating as a system consisting of airflow field and electric field (Ang and Lloyd 1987;Adamiak and Mao 1995;Adamiak 1997). These reports are insufficient for our purpose.…”

Section: Introductionmentioning

confidence: 96%

Numerical Simulation of Electrostatic Particle Deposition on a Target in Aerosol Flow with and without Effect of Deposited Charged Particles

Tanoue

Inoue

Masuda

2003

Aerosol Science and Technology

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A two-dimensional simulation of charged aerosol flow has been conducted for electrostatic particle deposition onto targeted areas of a substrate. The distribution of deposited particles changes dramatically according to the kind of substrate. For a substrate made from insulating material, particles deposit uniformly on it except for the edges of the targeted areas, while for a substrate made from conducting material, the effective area for particle deposition becomes narrower than that of the insulator substrate. By adopting a distortion of the electric field due to the charged particle deposition into the simulation code, we have studied the change of both the electric field and the particle deposition with the passage of time. In the course of time, the electric field becomes weak in the targeted areas and particles deposit also in the area outside the targeted area. We have also examined the effects of both initial surface potential and particle concentration on the distribution of deposited particles. The number of particles deposited increases monotonously with an increase in initial potential, and the coefficient of variation for the number of deposited particles in the targeted areas has an almost constant value up to a given initial potential and then decreases. On the other hand, the number of deposited particles has a maximum value at some sufficient concentration of feed particles, and the coefficient of variation has a minimum value at the same concentration.

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Section: Introductionmentioning

confidence: 96%

Numerical Simulation of Electrostatic Particle Deposition on a Target in Aerosol Flow with and without Effect of Deposited Charged Particles

Tanoue

Inoue

Masuda

2003

Aerosol Science and Technology

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“…The tribocharged powder samples were then dispersed in air and the particles were sampled by an electric single particle aerodynamic relaxation time (E-SPART) analyzer [8] for measuring aerodynamic size and electrostatic charge distributions of the powder samples.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Characterization of tribocharging properties of powder paint

Mazumder

Banerjee

Ware

et al.

Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting

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The chargeto-mass ratio (q/m) of individual particles plays a vital role in the powder coating process. Simultaneous measurements of particle size and electrostatic charge were performed on triboelectrically charged powder paint and other powders in the particle size range 1.0 to 65.0 pm in diameter. An electrical single particle aerodynamic relaxation time (E-SPART) analyzer was used to measure electrostatic charge (q) and aerodynamic size (d,) distributions on a [ 101 D. A. Hays, "Contact electrification between metals and polymers: effect of surface oxidation

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Coating Processes, Powder Technology

Richart¹

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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The coating processes used to apply coating powders all employ a fusion coating method. The individual power particles are melted and fused together to form a continuous coating useful in thin film, decorative, or thicker film functional applications. Application methods include the use of fluidized beds, electrostatic sprays employing both corona discharge and triboelectric guns, electrostatic fluidized beds, and hot flocking. Both thermoplastic coating powders based on nylon, plasticized PVC, or several fluoropolymers, as well as thermosetting coating powders are used. Thermosetting coating powders based on epoxy resins, epoxy‐polyester combinations, polyester‐TGIC cured, polyesters cured with blocked isocyanates, and acrylic resins are described. Properties of powder coatings are described as are the test methods and regulations regarding the coating powder. Methods of manufacturing coating powders include melt‐mixing and dry‐blending processes. Usage of powder coatings for both industrial and architectural applications is increasing worldwide.

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Investigation of charged particle trajectories in electrostatic powder coating systems

Cited by 16 publications

References 6 publications

Numerical Simulation of Electrostatic Particle Deposition on a Target in Aerosol Flow with and without Effect of Deposited Charged Particles

Numerical Simulation of Electrostatic Particle Deposition on a Target in Aerosol Flow with and without Effect of Deposited Charged Particles

Characterization of tribocharging properties of powder paint

Coating Processes, Powder Technology

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