PROCESS FOR OBTAINING AN IMPROVED ADHESION BETWEEN THE SURFACES OF TWO POLYMER COMPOSITIONS

摘要

The invention relates to a process for obtaining an improved adhesion between the surfaces of two polymer compositions, each polymer composition comprising at least one polymer, in which process the surface of at least one polymer composition is subjected to a plasma treatment using an electrical field, characterized in that: a) the surfaces of the two polymer compositions are subjected simultaneously to the plasma treatment; b) during the plasma treatment the two polymer compositions are in contact with each other and c) the electrical field is passed through the adjoining surfaces of the two polymer compositions. A 10-fold increase of the adhesion strength between the surfaces of the two polymer compositions is realized by a corona discharge treatment in air at atmospheric pressure. Also, the invention relates to a multilayered object, comprising at least two layers of a polymer composition with an improved adhesion between the layers. The polymers constituting the polymer compositions, are chosen from the group consisting of polyolefins, polyesters, copolyesters, polyetheresters, polyamides, polyetheramides, acrylonitrile-butadiene-styrene copolymers, cellophanes, polystyrenes, polyvinylchlorides, vinylidene chloride polymers, ethylene vinyl acetate copolymers, polyurethanes, polytetrafluoroethylene and blends thereof.