The exact thermal expansion coefficient depends on the polymer formulation, fiber geometry, backing structure, manufacturing process, and test method.
For this reason, manufacturers should ideally provide actual dimensional-stability test data rather than relying on a generic thermal expansion coefficient.
For example, a polymer component may experience measurable dimensional change over a large temperature range. However, the movement of the finished turf system is not necessarily equal to the thermal expansion of the individual grass fiber.
The backing, adhesive, reinforcement layer, tufting structure, seams, and substrate all influence the final dimensional behavior.
This is an important distinction when evaluating technical claims.
What buyers should ask suppliers for
For large projects, request test data covering:
- Dimensional change
- Thermal cycling
- Tensile properties
- Seam strength
- Tuft bind
- Backing stability
- UV/weathering resistance
For European and North American projects, the test method should also be identified clearly so that results from different manufacturers can be compared on an equivalent basis.
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