Large surface area geogrids with a high tensile strength, a method and apparatus for producing them, and their use as drain and reinforcement grids and as fences

摘要: The invention provides large surface area geogrids with a high tensile strength, method and apparatus for producing them, their use as drain reinforcement grids fences. the continuous production of which have comprise thermoplastic bars cross one another are joined together by welding at areas where they is characterized in that single-layer, homogeneous, molecular-oriented plastic strength used multiplicity crossing arranged behind next to intermittently welded simultaneously using vibration-welding technique. In this method, newly developed used, it has least vibration device can be weld 100 areas, preferably up 500 simultaneously.