{TAIL ~ Any suitable apparatus} which permits intimate mixture of the polymer and core materials, {HEAD ~ the introduction} of the supercritical fluid at a pressure sufficient to maintain its supercritical state, release of pressure from the system, expansion of the preparation and separation of the SCF can be used for this process 
{ TAIL ~ Any suitable apparatus } which permits intimate mixture of the polymer and core materials , { HEAD ~ the introduction } of the supercritical fluid at a pressure sufficient to maintain its supercritical state , release of pressure from the system , expansion of the preparation and separation of the SCF can be used for this process
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