New Blowing Agents

The strong international focus that has been placed on greenhouse gases and gases which are hostile to the ozone layer, has led Cannon to deep and strong efforts in R&D projects for the development of efficient and environmentally friendly foaming processes.

Since the beginning of Nineties, Cannon have started to evaluate the possibility to substitute the traditional blowing agents used to produce foams for other alternatives such as hydrocarbons. Today, Cannon can be rightly considered the largest supplier of foaming equipment for hydrocarbons-blown foams all over the world, with a wide range of available metering systems dedicated to this particular process.

The "A-System Penta Twin” is the high pressure metering machine designed for the safe use of flammable blowing agents, such as Cyclopentane, Isobutane, etc.. Submitted to a complete and accurate risk analysis, hydrocarbons-blown systems can be considered safe and pose no danger to the operators involved in the process or to the environment.

The fully open structure of the machine allows ease of access from any side, simplifying and facilitating any required maintenance works. Furthermore, thanks to its intrinsic modularity, the “A-System Penta Twin” series is the ideal solution for the replacement of existing foaming production unit based on CFC’s with hydrocarbons.

The research on a good substitute to CFC's as expanding for polyurethanes has brought Cannon Afros towards the most obvious alternative: Carbon Dioxide, being an environmentally friendly component (zero Ozone Depletion Potential - ODP), and a safe, non-flammable blowing agent with direct benefits for the working process.
Due to the high price of Isocyanate this is a very expensive way to produce CO2 while the high amount of water - to reach the lowest density grade - produces a lot of microcrystalline Urea that hardens the foam and increases its brittleness. Cannon Afros have developed dedicated solutions to add different percentages of natural CO2 in the PU blends and to control the froth during the moulding operation. CFC-free natural CO2-blown foam is today industrially feasible in open and closed mould processes:

 

CannOxide - for the direct injection of medium to high levels of CO2 in the mixing head

EasyFroth - for premixing medium to low levels of liquid CO2 either in the Iso or in the Polyol tanks.

Cannon developed patented technologies to foam in continuous called CardioTM.

For more details visit: www.cannonviking.com