Patent ID: 8887766

Claim:
A pressure relief valve for a packaging container comprising: a base plate ( 3 ) configured to be fastened on a wall of the packaging container and has a valve opening ( 9 ), a membrane ( 4 ) which is arranged on the base plate ( 3 ) over the valve opening ( 9 ), wherein the membrane ( 4 ) has an adhesive on a side facing the base plate ( 3 ), and an intermediate layer ( 6 ) disposed between the base plate ( 3 ) and the membrane ( 4 ), the intermediate layer ( 6 ) adhesively bonded to the adhesive-containing side of the membrane such that the membrane ( 4 ) has two remaining, adhesive-containing peripheral zones on opposite sides of the intermediate layer ( 6 ) fastened on the base plate ( 3 ), wherein the intermediate layer ( 6 ) directly contacts the base plate and covers the valve opening ( 9 ) when a pressure inside the container is below a predetermined pressure, wherein the intermediate layer ( 6 ) has a thickness (D 2 ) which is greater than a thickness (D 1 ) of the membrane ( 4 ).