| 摘要 |
The invention relates to a synthetic grass turf assembly for installation on a supporting soil substrate to provide a game playing surface that combines the feel of natural turf with the wear resistance of synthetic turf. The turf assembly includes a pil e fabric with a flexible sheet backing and rows of upstanding synthetic ribbons representing grass blades, extending upwardly from an upper surface of the backing. A unique infill layer of multiple distinct graded courses of particulate material is disposed interstitially between the upstanding ribbons upon the upper surface of the backing and of a depth less than the length of the ribbons. A base course is first placed upon the top surface of the backing and consists exclusively of hard sand granule s. A middle course of intermixed hard sand and resilient rubber granules with relative weight ratio of 3 to 1 is then placed upon the base course. A top course exclusively of resilient rubber granules is then placed upon the middle course. The relatively thin top course that is in contact with users, has a high resilience where contac t occurs and low abrasion due to exclusive use of rubber. The base sand course provides weight to hold the turf in place and to quickly drain the surface. The middle layer of mixed sand and rubber granules acts as abuffer to keep the base sand and top rubbe r courses separate avoiding migration of abrasive sand towards the top surface level. An upper portion of the synthetic ribbons extends upwardly from the top surface of th e top course 0.25 to 1.00 inches to give the appearance of grass blades. Preferabl y the upper portion of the synthetic ribbons is fibrillated, split or frayed on si te by passing over the installed surface with a stiff wire brush. The fibrillated surface has a slight resilience and visually appears like a natural grass turf. The criss-crossed fibrillated fibres contain the top course rubber granules while allowing dislodged rubbe r granules to fall back into place and permitting water to drain through to th e sand containing courses. |
