A pyramidal geotextile fabric comprising two sets of multi-lobe filament yarns interwoven in substantially perpendicular direction to each other, each of the multi-lobe filament yarns having pre-determined, different heat shrinkage characteristics such that, upon heating, the fabric forms a three-dimensional,...http://www.google.fr/patents/US8043689?utm_source=gb-gplus-shareBrevet US8043689 - Pyramidal fabrics having multi-lobe filament yarns and method for erosion control
Pyramidal fabrics having multi-lobe filament yarns and method for erosion ...
