How Coating Weight Influences Artificial Turf Backing Performance

Introduction

Coating weight is a key process parameter in artificial turf manufacturing. It affects the quantity of backing compound applied to the primary backing and can influence tuft bind, material consumption, flexibility, and the final structure of the turf.

For SBR latex systems, the target coating weight should be established according to the specific turf design and required performance.

What Happens When Coating Weight Changes?

When coating weight is too low

The coating may not provide sufficient coverage or anchoring for the yarn tufts. This can  inconsistent bonding or failure to meet the required tuft bind specification.

When coating weight is too high

Additional compound may increase raw material consumption and alter the stiffness or weight of the finished product. A higher coating weight does not automatically guarantee better overall performance.

How to Control Coating Weight

First, establish the target based on the product specification and actual production trials. Next, monitor the compound's solids content, because wet application weight and dry coating weight are not the same.

For a simple estimate:

For example, if the wet coating weight is 1,000 g/m² and the compound solids content is 50%, the estimated dry coating weight is 500 g/m², assuming uniform application and complete removal of water.

Manufacturers should also check coating uniformity across the width of the roll and verify results using their established measurement procedures.

Conclusion

Controlling coating weight is about achieving the required performance with a consistent and appropriate amount of material. Combining coating-weight measurements with tuft bind and flexibility testing provides a more complete evaluation.