Yarn type and infill type are the dominant factors for achieving ideal angle ball rebound.

Impact on Angle Ball Rebound

Angle ball rebound chart
-- according to Dow research

General Characteristics Dow Products Qualities Results
Yarn Type

The yarn type and design can have an effect on the vertical ball rebound as a result of the yarn resilience and stiffness properties as well as its bend resistance characteristics.

In the case of a very soft and low resilient yarn, or a yarn that fibrillates easily and with low mechanical properties, the angle ball rebound is influenced significantly.

DOWLEX™ Polyethylene Resins, ELITE™ Enhanced Polyethylene Resins

Softness, resiliency, weatherability
mechanical toughness

Long durability for play consistency
Pile Height Pile height has a minor influence on ball rebound. In principle, the higher is the pile the lower will be the ball rebound, while the harder the pile the higher will be the ball rebound. Your Dow product choice for yarn type will contribute to desired pile height.
Infill Type

The hardness and stiffness of the infill type, be it silica sand or rubber granule, has a significant impact on ball rebound.

In addition, the shape of the infill granules plays a role, whether pelletized and round, or grinded and therefore more jagged.

VERSIFY, ENGAGE™ Plastomers & Elastomers, ENGAGE™ Elastomers

Overall flexibility, good balance, softness

Required energy absorption level is obtained, as much as the required ball angle