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Which technique is used to foam PVC (mechanical or chemical)? Which kind of blowing agents?

April 26, 2017agents blowing chemical foam mechanical PVC technique Used

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Which technique is used to foam PVC (mechanical or chemical)? Which kind of blowing agents?

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The most used technique is a chemical one: the addition of blowing agents introduced in the recipe. The main blowing agents are the Azodicarbonamide and the Sodium Bicarbonate. They are often used together to obtain regular bubbles. A physical technique can also be used (supercritical CO2).