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ice blasting

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CO2 (Dry ice) Blasting

Dry ice blasting is a form of abrasive blasting, where dry ice, the solid form of carbon dioxide, is accelerated in a pressurized air stream and directed at a surface in order to clean itDry ice blasting involves propelling pellets at extremely high speeds. The actual dry ice pellets are quite soft, and much less dense than other media used in blasting-cleaning (i.e. sand or plastic pellets). Upon impact, the pellet sublimates almost immediately, transferring minimal kinetic energy to the surface on impact and producing minimal abrasion. The sublimation process absorbs a large volume of heat from the surface, producing shear stresses due to thermal shock. This is assumed to improve cleaning as the top layer of dirt or contaminant is expected to transfer more heat than the underlying substrate and flake off more easily. The efficiency and effectiveness of this process depends on the thermal conductivity of the substrate and contaminant. The rapid change in state from solid to gas also causes microscopic shock waves, which are also thought to assist in removing the contaminantDry ice blasting can be used to clean food processing equipment to effectively decontaminate surfaces of Salmonella enteritidis, E. coli, and Listeria monocytogenes such that these microorganisms are not detectable using conventional microbiological methods,

Instead of using hard abrasive media to grind on a surface (and damage it), dry ice blasting uses soft dry ice, accelerated at supersonic speeds, and creates mini-explosions on the surface to lift the undesirable item off the underlying substrate.Cold Jet dry ice blasting uses compressed air to accelerate frozen carbon dioxide (CO2) "dry ice" pellets to a high velocity

Dry ice blasting is a non-abrasive, nonflammable and nonconductive cleaning method
Dry ice blasting is environmentally-friendly and contains no secondary contaminants such as solvents or grit media
Dry ice blasting is a clean and approved for use in the food industry
Dry ice blasting allows most items to be cleaned in place without time-consuming disassembly
Dry ice blasting can be used without damaging active electrical or mechanical parts or creating fire hazards
Dry ice blasting can be used to remove production residues, release agents, contaminants, paints, oils and biofilms
Dry ice blasting can be as gentle as dusting smoke damage from books or as aggressive as removing weld slag from tooling
Dry ice blasting can be used for many general cleaning applications
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Dry ice blasting is gaining speed in the US. It is being represented as one of the better alternatives to traditional blast cleaning methods (like hydro, walnut, and sand). Dry ice blasting is 100% eco-friendly and is definitely being looked at more and more by companies looking to reduce their carbon footprint.
Here is a great source for dry ice blasting information:
Dry ice-blasting is a form of carbon dioxide cleaning, where dry ice, the solid form of carbon dioxide, is accelerated in a pressurized air stream and directed at a surface in order to clean it. An alternative media for non-abrasive blasting is water-ice, known as ice blasting.

The method is similar to other forms of abrasive blasting such as sand blasting, plastic bead blasting, or sodablasting substituted for dry ice as the blasting medium. Dry-ice blasting leaves no chemical residue as dry ice sublimates at room temperature.

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