Patent ID: 8557363

Claim:
An artificial grass turf carpet comprising: a ground structure having an upper surface, a plurality of spaced-apart synthetic grass fibers attached to and upstanding from said ground structure, which synthetic grass fibers form a grass surface of said artificial grass turf, and a resilient, dense base layer comprising a plurality of synthetic base layer fibers attached to and upstanding from said ground structure, and positioned between the upstanding synthetic grass fibers, said base layer fibers having a lower height and a greater stiffness than said grass fibers, wherein the base layer fibers are positioned tight against one another and against adjacent grass fibers to provide a tightly packed base layer above which the grass fibers extend, wherein the dense base layer has a density of between about 300 and about 800 base layer fibers per meter length of carpet, and the combined cross-sectional area of the grass fibers and base layer fibers, measured at the upper surface of the ground structure, is at least about 90% per unit of the surface area of the grass turf carpet, and wherein the resiliency of the dense base layer is substantially restored after being compressed, such that the presence of infill material is optional for compressive use of the artificial grass turf carpet.