Dry ice invention

A simple, ingenious carton box packaging design which uses dry ice to cool fresh and frozen products during transport, is turning hot profits for two South African engineers.
The inventors say their innovation allows small players to enter the distribution market.
The patented packaging, called Heat Buster, allows products to be transpo {mosimage}A simple, ingenious carton box packaging design which uses dry ice to cool fresh and frozen products during transport, is turning hot profits for two South African engineers.
The inventors say their innovation allows small players to enter the distribution market.
The patented packaging, called Heat Buster, allows products to be transported without refrigeration trucks, and controls the level of coolness distributed by the dry ice, even when products are on- and offloaded.
The Heat Buster is being used to transport products like meat, fruit and vegetables; in mobile beverage and ice-cream trolleys; and by people taking safaris.
“The correct amount of dry ice for each product depends on the required temperature and duration of transport,” says Deon Roux of Dry Ice Int, who invented the concept together with Hendrik Strampe. For example, one Heat Buster placed in a domestic cooler box should keep the temperature at under 7™  °C for 36 hours. If the product needs to be frozen, a few Heat Busters are used.”
Conventional methods of transporting fresh or frozen products include the use of refrigeration units, “wet ice” and dry ice, or a combination of these. The benefit of using dry ice, says Roux, is that no extra weight is transported, no major capital outlay is needed, and there is no water spillage that can lead to corrosion.
Dry ice is frozen carbon dioxide with an average temperature of around -78.5™  °C. The Heat Buster slows down the rate of sublimation (transformation to a gas), providing a more constant, regulated flow of coldness throughout the container. It also saves costs when non-insulated containers are used.
The Heat Buster consists of a carton box housing a 65x192mm piece of dry ice weighing 2kg. Slots in the Heat Buster allow for the regulated flow of carbon dioxide gas into the container.
Dry Ice Int sells Heat Busters as well as the boxes and machinery to make and cut dry ice. The machinery and associated technology for making dry ice is expensive – totalling around $80,000. The partners say that any dry ice maker needs to be located near a producer of carbon dioxide gas (for instance, a soft drink maker).

  • Dry Ice Int has in the past five years also ventured into dry ice blasting or dry ice cleaning of equipment for a number of industries, including food processing. This non-corrosive process can, for instance, be used to clean baking ovens and remove paper dust and glue from packaging equipment.
    Dry Ice Int: Tel +27-12-803 1150; deon@dryice.co.za