Dry Ice is solid form of carbon dioxide. Solid carbon dioxide is characterized by phase change from solid state directly to gaseous state without undergoing change into liquid state with an increase in temperature. As such, it does not lead to any residue post the phase change and hence is rightly termed as Dry ice. Dry ice manufacturing process involves initially compressing and cooling gaseous carbon dioxide to yield liquid carbon dioxide. In the next step, this liquefied carbon dioxide is allowed to undergo expansion following which it is pressurised to yield solid carbon dioxide or dry ice. Dry ice is often used instead of traditional water based ice due to relatively lower temperature(-79 degrees) of dry ice as compared to that of water based ice at the same time it does not melt into a liquid form, rendering it free from waste generation. Moreover, dry ice is non-flammable and non-toxic as opposed to some of the other refrigerants used.
Why is there a need to do a carpet dry cleaning when steam cleaning machines are readily available for use? The answer is simple. Steam cleaning uses hot water and detergent to clean the carpet and will take time to dry. This means, you will have to wait about 12 to 24 hours to let your carpet sit and be able to use again. With dry carpet cleaning, it uses chemical agents which is more effective in cleaning carpets and no time needed for drying.