Patent ID: 6818087
Filing Date: 2004-11-16
Classification: A01N,B32B,Y10S,Y10T

Abstract:
Process for producing an article in a form of a sheet comprising a single-layer homogeneous matrix containing at least one active substance for an application site, said at least one active substance being selected from crop protection agents, biocides, fertilizers, plant strengtheners, cosmetic active principles and fragrances, said process comprising the following temporally and spatially separate steps:a) applying the at least one active substance as a flowable medium having a viscosity of at least 1000 mPaÂ·s to at least one of the two layers, identical in composition of a base material, at a pressure &lE;12 bar with metering b) placing the two base material layers atop one another so as to enclose the at least one active substance applied, and irreversible joining of the layers with the at least one active substance therebetween under pressure of 2 to 10 bars to form a laminate; and c) storing the laminate for predeterminable duration under defined conditions to effect migration of the at least one active substance into the base material layers and connection of the base material layers at their interfaces to form a single-layer homogeneous matrix in which the at least one active substance is substantially uniformly distributed.