Patent ID: 7399718
Filing Date: 2008-07-15
Classification: B28B,B32B,C04B,E04C,Y10T

Abstract:
1. A multilayer material comprising: (a) a first layer which consists of gypsum or in essential parts of gypsum, (b) at least one second layer, comprising a layered textile fiber material with fibers which are joined in a mechanically stable manner among one another, which are not flammable and which are weather-resistant, and its intermediate spaces are filled with a material which has fine pores, the second layer having a diffusion-equivalent air layer thickness of less than 2.0 m and being impermeable to water at a water pressure of at least 100 mm water column, wherein the material which has fine pores is selected from the group consisting of a partially or entirely an inorganic material.