METHOD AND DEVICE FOR DEPOSIT PARTICLE LAYERS USING ALTERNATING DELIVERY OF POSITIVELY AND NEGATIVELY CHARGED PARTICLES

摘要

A delivery system includes a first layer which includes at least one of positively-charged particles and positively-charged molecules. A second layer is in contact with the first layer. The second layer includes at least one of negatively-charged particles and negatively-charged molecules. At least one of the first and second layers includes an active agent, such as an oral care agent. The active agent is incorporated in the positively-charged particles and/or negatively-charged particles of the respective layer.