Safety & Testing
The following is a list of some of the testing we perform on our sports systems to make sure we meet and exceed all turf field safety, durability, and performance expectations. We submit our products to different independent testing labs so that they can conduct industry standard tests as set by the American Society for Testing and Materials (ASTM).
A test specimen is impacted at a specified velocity with a missile of given mass and geometry. A transducer mounted in the missile monitors the acceleration-time history of the impact, which is recorded with the aid of an oscilloscope or other recording device. The 20 lb. missile with a 20 in 2 surface area is dropped at the appropriate height to ensure the appropriate missile speed as specified by the ASTM method.
This test method is designed to measure the force required to pull a tuft completely out of a pile floor covering. it’s applicable to both cut and looped pile construction.
This method covers the determination of yarn number in package form. Specified lengths of yarn are wound on reels as skeins and weighed. The yarn number is calculated from the mass and the length of the yarn in the skein.
This test method is designed to measure the breaking load or woven and non-woven backing fabrics. It is a measure of the fabric’s ability to withstand the forces applied during installation and the loads imposed by heavy traffic
Representative test specimens are taken from the sample submitted and conditioned to equilibrium at 70º ± 2º F and 65% ± 2% relative humidity. The pile yarn mass is determined by separating and removing the pile yarn from the backing fabric and the back coating with the assistance of the appropriate solvents.
This test method is intended to measure the response of finished textile floor covering materials when exposed to an ignition source under controlled laboratory conditions. It is applicable to all types of textile floor coverings whether constructed from natural or man-made materials.
The test sample of turf is prepared to the requested pounds per unit area of infill blend. This prepared surface is pre-conditioned and then attached to the Lisport device. The rolling heads are traversed across and back for a total of 40,000 cycles. At 2,500 cycle intervals the sample is reconditioned with any infill that has been displaced. After the testing, the sample is examined and comments are made on the condition of the system and the individual fibers.
HIC stands for Head Injury Criterion. Similarly to the GMAX test, it measures the collision force to the surface. However, this test is designed to mimic the shape of a head in order to better gauge the likelihood of head injury. This test is required by World Rugby standards, and is also used in many playgrounds.
All of the following information is derived from FIFA and their testing methods to determine the performance and playability of a soccer pitch.
Vertical ball rebound: This test method is designed to measure the force required to pull a tuft completely out of a pile floor covering. It is applicable to both cut and looped pile construction.
Angled ball rebound: This test method is designed to measure the force required to pull a tuft completely out of a pile floor covering. It is applicable to both cut and looped pile construction.
Ball roll: The higher the value the faster the ball will run over the surface. The ball should not be too fast or too slow.
Shock absorption: Shock absorbency is an indication of how hard the field feels to the player. A value that is too low indicates a hard field and causes damage to players’ joints. Too soft and the surface is energy sapping, resulting in increases in fatigue and overuse injuries.
Deformation: A surface that deforms too much will result in overstretching of ligaments, particularly around the ankle.
Rotational resistance: This simulates the player’s ability to alter direction. Too high a value and stress can occur across knee ligaments, too low and the player will not be able to grip the surface and may slip causing ligament damage.
Linear friction (2 methods of testing):
- If, when stopping, the player’s ankle is subject to too high a deceleration, damage to the ankle can occur. Therefore too high a value will result in an increased risk to ankle injuries.
- A player needs to accelerate and decelerate rapidly. To achieve this effect the player needs to obtain grip from the surface. Too high a grip will lead to injury. Too low a grip will result in the boot slipping in the surface and the player cannot accelerate or decelerate safely.
Skin abrasion/skin friction: A special silicone elastomer that simulates natural skin is rubbed over the surface at speed. Afterwards, the damage to the silicone is assessed and the friction between the silicone elastomer and the synthetic grass is recorded. The change in the elastomer is measured, a large change indicating an abrasive surface.
Lisport (Up to 80,000 cycles): Measures fiber durability, emulates cleat interaction on synthetic turf, and is typically run through 20,000-30,000 cycles, equating to roughly 8 years of usage.