Process of laying synthetic grass

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS With reference to FIG.
1, the invention relates to a synthetic grass turf assembly consisting of a pile fabric with an infill layer of particulate matter which is installed on a supporting soil substrate to provide a game playing surface.
The pile fabric includes a flexible sheet backing 1 that in the embodiment shown is a two-ply open weave fabric.
Extending upwardly from an upper surface of the backing 1 is a large number of upstanding synthetic ribbons 2.
As indicated in FIG.
1, the ribbons 2 are tufted through the backing 1 spaced apart in rows by a distance W and of a length L.
The length is selected depending upon the depth of infill and the desired resilience of the completed synthetic grass turf assembly.
Disposed interstitially between the upstanding ribbons 2 upon the upper surface of the backing 1 is an infill layer 3 of particulate matter.
The particulate matter may be selected from any number of commonly available hard granules such as sand, small rocks or other graded particulate matter and resilient granules such as crumb rubber.
The infill layer 3 is made up of a base course 4, a middle course 5 and a top course 6.
The base course 4 is substantially exclusively of hard sand granules disposed immediately upon the top surface of the backing 1.
The middle course 5 is of intermixed hard sand granules and resilient rubber granules.
The mix is selected on the basis of a weight ratio greater than 2 to 1 of hard and resilient granules respectively.
The top course 6 is substantially exclusively of resilient rubber granules.
An upper portion 7 of the synthetic ribbons 2 extends upwardly from a top surface 8 of the top course 6.
The resulting artificial turf surface can be adapted for several indoor and outdoor uses, such as: athletic playing fields; horse racing, and recreational areas.
In order to deposit multiple distinct layers, it is necessary to pass over the same area several times with a substantially pure sand spreading operation then proceeding over the same area again with a mixed sand and rubber material