PROCESS FOR PRODUCING POLYLACTIC ACID-BASED RESIN EXPANDED BEADS
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United States of America Patent
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Nov 13, 2014
app pub date -
Sep 21, 2012
filing date -
Oct 18, 2011
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Abstract
A process for producing polylactic acid-based resin expanded beads comprises releasing foamable resin particles, which are in a softened state and dispersed in a dispersing medium contained in a pressure resisting closed vessel, to an atmosphere having a pressure lower than that in the closed vessel together with the dispersing medium to foam and expand the foamable particles. The foamable resin particles are obtained by impregnating a physical blowing agent into resin particles which are formed of a modified polylactic acid resin modified with an epoxide and showing specific physical properties when melted.
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