MULTILAYERED THERMOPLASTIC RECYCLABLE SHEET WITH SPECIFIC GRAVITY LOWER THAN THAT OF THE PRIMARY CONSTRUCTION MATERIAL

摘要

It is disclosed a thermoplastic sheet designed for the construction of surfaces. It is characterized in that it is manufactured from recyclable material of three or several bodies; the two external sides are made of plastic primary material of controllable thickness whereas the middle layer is inflated and of special gravity lower than that of the primary construction material.The invented sheet is an ecological and waterproof construction.