FIELD: construction.
SUBSTANCE: invention relates to a substrate layer of a multilayered insulation panel for building structures. In particular, the invention relates to a substrate layer of a panel related to a gas-impermeable type and showing increased flame delay characteristics. The multilayered insulation panel contains a central body formed of insulation foam material with a cell structure, the first substrate layer and the second substrate layer. In this case, the central body of the panel is located between the first substrate layer and the second substrate layer; the second substrate layer is similar to the first substrate layer or consists of a finishing layer having gas impermeability characteristics and different from the above-mentioned first substrate layer. The above-mentioned first substrate layer includes: a gas-impermeable reinforcing layer with the first surface and the opposite second surface, wherein the second surface of the gas-impermeable reinforcing layer fits to one of two opposite surfaces of the insulation central body; a fire-resistant layer functionally connected to the first surface of the gas-impermeable reinforcing layer, in which the gas-impermeable reinforcing layer includes a metal layer for preventing the diffusion towards the outer environment from the panel itself.
EFFECT: invention provides for the development and provision of availability of a substrate layer of an insulation panel for buildings, which, while maintaining essentially the same gas impermeability characteristics of the panel over the time, also makes it possible to improve fire delay characteristics of the panel, while limiting its factory cost price.
6 cl, 2 dwg
