The charts shown here detail a series of tests which were carried out to determine the comparisons between Coolgrass®, regular polyethylene yarns and natural turf. In addition to Surface Temperature tests, measurements were taken on NIR (Near Infrared Reflection) and on Solar Reflectance.

Actual system performance will be a function of construction and climate but it is clear the Coolgrass® technology helps control temperature. Coolgrass® technology is available on all Bonar Yarns grass systems.

Ask your turf installer for Coolgrass® technology.

 

Visit the Bonar Coolgrass™ website for further details www.bonarcoolgrass.com

 

Click here to download a pdf
of these technical details.

Spectrum of Solar Radiance

Temperature Difference

Surface Temperature

The surface temperature tests are carried out using digital thermocouples attached to a data recorder taking readings every 15minutes. All surface Temperature tests were carried out in Phoenix, Arizona by Atlas Weathering.

 

 

Weatherometer (WoM) tests are carried out on site at Bonar Yarns, using an Atlas Ci4000 Xenon arc WOM tested according to ISO 4892 part 2. After exposure in this artificial weathering machine, it is possible to test the % retained strength in the fibre; samples below 50% fail the test. Colour fastness is also tested in the WOM and compared against the Grey Scale for assessing change in colour. The scale runs from 1 to 5 with 5 being no change in colour, the test runs for 6000 hours.

 

NIR is a measurement of the amount of near infrared reflected from the surface. The near infrared wavelength is the heat part of the electromagnetic spectrum, and is from 800nm to 2500nm. Total solar reflectance is the sum of ultraviolet, visible and near infrared reflectance. % Solar is a measure of total solar reflectance.