Minimum ignition energies of coating powders for the electrostatic powder coating process

Electric Spark Ignition Eneries of Coating Polymer Powders

“…1) Various reports have been published on the ignitability of dust clouds over a long period of time. 2,3) However, the MIEs of coating powders due to an electrostatic spark have not been sufficiently investigated. Therefore, in the present study, experiments were conducted dealing with the MIEs of several kinds of coating powder, which differ with respect to polymer type, pigment type, noncombustible mass fraction, and particle size.…”

Combining product engineering and inherent safety to improve the powder impregnation process

“…The copolyester binders can be considered as sensitive (coPE2) or even as very sensitive to electrostatic ignition (coPE1). These values of respectively 45 and 21 mJ are rather different of the one quoted by von Pidoll and Krämer (1993) for polyester powders, i.e. 2.9 mJ.…”

“…(Bideau et al, 2011), an inerting limit could be reached. However, in our peculiar industrial case and for concentrations lower than or equal to 3 %wt., silica could not be considered as an inertant, but, on the contrary, as a promoting agent for dust dispersion (von Pidoll and Krämer, 1993) and as a consequence, for dust ignition. Figure 7 shows that the MIE of ternary mixtures containing 1 %wt.…”

Helmut Krämer memorial lecture: Electrostatic assessment of products and processes – A view backwards and forwards

“…hexane, methane, ethylene, hydrogen, propane, acetone, ethyl acetate, ammonia, chlorohydrocarbons) [61,62]. In the 1990s, he continued this work with U. von Pidoll and determined the MIE of powders and liquid paints [63,64]. In 1993, both were awarded the Helmholtz Prize for their work on the MIE of coating powders [65].…”