Non Infill Turf Development

First of all, we should understand why to use artificial grass infill (quartz sand, crumb rubber, or both):

1.Infill provides a structure for the artificial grass fibers, helping the fibers to stand. The fibers of an artificial turf naturally lay “flat” without the infill material if the artificial grass has no frizzy fibers in the root. For most products, even the artificial grass with thatch can not stand very well without infill.

2.Infill provides a “cushion” effect when stepping over the turf. This protects the roots of the fibers and at the same time adding resilience to the whole artificial turf system. Normally infilled artificial grass system could take more traffic than a non-infill artificial grass system under the same condition.

3.Infill protects the primary backing from UV exposure. For the traditional football turf, or artificial grass with thatch but pile less than 30mm, the yarn can not cover the primary backing completely. Infill protects the primary backing from UV exposure and it helps to extend the useful life of your artificial grass product.

Usually non-infill artificial grass refers to those artificial grass with frizzy fibers(also known as thatch); narrow-gauge (distance between rows); and high stitch rate. The frizzy fibers are working similarly as infills to support the grass to stand, and to provide appropriate resilience.
So there are three obvious key factors for the non-infill artificial grass: With thatch in the root zone
Narrow gauge, normally the gauge is no less than 3/8inch
High stitch rate even three factors are listed above, there are no exact technical data to define which artificial grass needs an infill, and which no need. Just keep this in mind: the non-infill turf should be dense enough, flexible enough, and can endure enough traffic