What ingredient causes gum to have long lasting flavor?

A vinyl polymer encapsulated matrix. The matrix itself includes about 30% to about 60% acacia gum, about 30% to about 60% corn syrup solids having a DE of between about 24 and about 44 or equivalent hydrogenated starch hydrolysates, and about 2% to about 20% hydrocolloid material, with the acacia gum and corn syrup solids or hydrogenated starch hydrolysates together comprising at least 80% of the matrix. The vinyl polymer comprises between about 30% and about 80% of the long-duration flavor material.