Fire protection barrier has two layers of expanding materials as shut-off device with reaction temperature of first layer a predetermined amount below that of second layer

摘要

the fire protection barrier has a housing with a layer of heat-expanding material so that an interior space can be closed by a shut-off device formed as a first layer (1) of expanding material whose reaction temperature is a predetermined amount below that of the second layer (2) by means of which an insulation is provided through expansion against the passage of heat. The reaction temperature of the expandable material of the first layer is at least 70 and preferably 100 degrees C whilst the reaction temperature of the inflation material is at least 110 and preferably 140 degrees.