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One method to encourage bubbles to come out of the bulk material is a 2-stage heat cure.  This is a short, initial cure at an elevated, but lower, temperature than the final cure.  An example is a 50°C cure for 30 minutes, for a product that has a final cure at 85°C.  The effect of the initial elevated heat step is to expand any bubbles that are still in, or recently introduced into – by pouring, injecting, or otherwise filling a cavity – the epoxy, increasing their size and buoyancy,  encouraging them to rise out of the epoxy and escape.  This elevated heat step also lowers the viscosity of the epoxy, without strongly driving the curing reaction, further enabling any expanded bubbles to rise and escape from the epoxy.

READ THE BLOG: Polymer Expert Blog: Defeating Bubbles

 

Additional resources from the FOC team include:

 

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Kathleen Skelton

About Kathleen Skelton

Kathleen Skelton, as FOC's Director of Strategic Marketing, utilizes her expertise in business development, online strategy, market planning, digital best practices, standard operating procedure development, and content management. A graduate of Curry College, she holds degrees in Communications and Education, English and Psychology. Kathleen resides outside of Boston, MA with her husband and four children. Follow @KATHLEENSKELTON