ROLL-LIKE MATRIX HAVING INCREASED ROLL-RELEASING CAPACITY AND METHOD FOR ITS MANUFACTURE

摘要

PURPOSE: To provide a roll-like matrix body having enhanced releasability in the using environment after storing for a long period of time and useful for applying to a ruminant by covering one face of an activator-containing polymeric matrix body with an elastomer and binding to a roll-like shape. CONSTITUTION: A simple matrix body is obtained by mixing an activator (e.g. morantel citrate or morantel tartrate) into a softened previously shaped polymer. The matrix body is added and covered with an elastomer (e.g. silicone rubber) by using pressure, heat or a binder, etc. Then, the covered matrix body is bound by winding to a roll-like shape so as the elastomer covering face to be outside of the matrix body. By the method, the activator can be released under controlling for a long period of time.