Could you explain the difference between Bicarbonate and Azodicarbonamide as chemical blowing agents?
The Bicarbonate is endothermic and has a slow decomposition speed. It’s recommended for the internal expansion (“celuka process”) and it gives hard skin in this process. It gives a wider distribution of the cells diameters. The Azodicarbonamide is exothermic and has a quick decomposition speed but a slow diffusion speed in the melted flow. It gives better cells and narrow distribution of cells diameters but a less hard skin.
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