Plastic Media Blasting (PMB) is a dry abrasive blasting process designed to replace chemical paint stripping operations and conventional sand blasting. Chemical paint stripping is primarily used on aircraft by applying chemical gels to the painted surfaces or by dipping the component into a tank of unquelled stripper. The paint and solvent mixture are scraped and washed off with water.
That process generates large quantities of paint/solvent sludges which may contain chromium, other toxic metals, and toxic organic substances (e.g., phenols, chloroacetic acids, and methylene chloride) from the stripping solvents.
Conventional industrial sand blasting uses silica sand suspended in a high pressure air stream to remove paint from surfaces. Fugitive dust composed of both paint and sand particles is created and requires management during the abrasive process. The used silica sand is not typically recycled; the waste stream mixture of sand and paint chips is disposed as hazardous waste depending on the paint constituents.
Plastic Media Blasting is performed by All American Powder Coating in our ventilated booth. PMB is similar to conventional sand blasting except that soft, angular plastic particles are used as the blasting medium. The PMB process propels the plastic media at a much lower pressure (less than 40 psi) than conventional blasting. PMB is well suited for stripping paints, since the low pressure and relatively soft plastic medium have minimal effect on the surfaces under the paint.