FILM MATERIAL FOR THE CHECKABLE LEAKPROOF SEPARATION OF THE REGIONS SITUATED ON ITS TWO SIDES

摘要

Flexible film material for the checkable leakproof separation of the regions situated on its two sides, for example a seepage barrier. In the intermediate cavity between two sealed films there is provided a planarly cohesive spacer which forms open flow cross-sections parallel to the film extension so that noxious substances entering at any point in the intermediate cavity can be drawn off at another point and thereby detected.