PACKAGING MATERIAL WITH INTEGRATED PRESSURE RELIEF VALVE Russian patent published in 2014 - IPC B32B3/08 B32B3/26 B32B1/02 B65D77/22 

FIELD: packaging industry.

SUBSTANCE: invention relates to the packaging of food products and relates to a packaging material with an integrated pressure relief valve. It comprises one-sided pressure relief valve comprising a first inner film provided with at least one through inlet opening, and a second outer film covering the said at least one inlet opening and connected to the first inner film, forming a channel part between the inner and the outer film. The channel part communicates with the environment surrounding the package through at least one outlet opening hole located separately from at least one inlet opening. The pressure relief valve additionally comprises the liquid provided in the channel part and the solid separation means provided in the channel part adjacent to the said at least one inlet opening. The outer film is a soft film having flexibility or elasticity such that in the tensile test the force less than 5 N is required to stretch by 5% of the sample with the width of 15 mm.

EFFECT: invention provides creation of the packaging material comprising an integrated one-sided pressure relief valve with low pressure of opening.

24 cl, 10 dwg