Yarn type, pile height, and infill type can all have a significant effect on ball roll.

Impact on Ball Roll

Ball roll chart
-- according to Dow research

General Characteristics Dow Products Qualities Results
Yarn Type

The yarn type used in a system has a significant impact on the ball roll, as it is essentially its shape and the sliding (skin friction) and stiffness properties of the polymer used in the yarn that will determine ball direction and rolling distance.

A mono-filament yarn type enables to shape the design of the yarn to influence its bending modulus and meet ball roll requirements.

DOWLEX™ Polyethylene Resins

Shape, sliding behavior, stiffness properties

Required ball roll performance is achieved
Pile Height

Pile height, in combination with yarn stiffness and design, has a significant impact on ball roll.

The length and the stiffness of the pile will contribute to the slowing down factor of the ball and determine ball rolling distance.

Key to achieve best performance is to find the right balance on the interlinked property characteristics of the infill, pile height and geometry of the yarn.

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 granules, has a significant impact on ball movement.

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

VERSIFY™ Plastomers & Elastomers, ENGAGE™ Elastomers

Overall softness and sliding properties

The harder the infill, the longer the ball rolls; the more jagged the infill, the more stable and smooth surface