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Systems 2018-06-04T17:39:17+02:00

Systems

Edel Grass works on a system-based approach. We regard the synthetic turf pitch as a carefully thought out system in which the top layer has to work with the right substrate to create perfect playing properties.

Each site requires a customised solution. Moreover, each level of play makes specific requirements of the system. That is why we always work with the same partners, since they are in the best position to assess local circumstances. As a result, we are always able to deliver a customised system in which the client’s wishes and local conditions are used as our point of departure.

Synthetic Turf System

A synthetic turf system is made up of various components. The correct combination of these components guarantees a perfect performance from the field. A distinction is made between the surface layer and the sub-base.

The surface layer of a synthetic turf system consists of the fibre, the backing and the infill material. This provides most of the playing properties, such as friction resistance, ball roll and low sliding resistance.

The sub-base is the foundation of the system. The sub-base also influences the playing properties, providing shock absorption, ball rebound, deformation behavior and energy restitution.

Fibre

The fibres are the part of the synthetic turf system which the player comes into contact with. Together with the infill, the fibre ensures that the players can manoeuvre and slide-stop in a controlled way. Good ball roll and sliding characteristics are largely due to the fibre. The fibre is thus essential in providing the playing properties of the field, as well as giving it its distinctive natural look and feel.

Edel Grass’s fibres are supplied by TenCate. There are two types of fibre in the synthetic turf market:

Monofilament fibre

  • Monofilament turf blades are extruded through a spinneret. The die hole of the spinneret determines the cross section of the blade. The design of the turf blade plays an important role in the performance characteristics of the synthetic turf pitch.

Fibrillated Tape

  • Fibrillated tape products are produced by foil extrusion. The foil is slit into tape and the tape is fibrillated with a specific pattern. This fibrillation provides a natural look and feel.

Backing

The backing ensures that the fibre stays in place. The fibre is tufted into the backing. The 3 key benefits of a backing are:

  • Provides the strength of the synthetic turf system;
  • Dimensional stability (prevents tension and shrinking due to weather conditions);
  • Tuftlock (ensures tuft bind)

 

A distinction is made between primary and secondary backing. The primary backing is also referred to as the tuft canvas. This is the layer onto which the fibres are secured to create a synthetic turf mat. The primary backing is made of polypropylene, a strong and dimensionally stable material.

The fibre is then secured by the secondary backing, which ensures the tuftlock of the fibre. A choice can be made between a latex backing or a polyester/fibreglass reinforced backing. Polyester and fibreglass are used in non-infill systems because these systems are more sensitive to weather and temperature effects. Systems with infill are already sufficiently heavy and remain securely in place. A latex backing alone is therefore adequate.

The combination of the right primary and secondary backing ultimately determines the strength of the synthetic turf top layer.

Infill

An infill layer is used in order to improve playability on artificial grass. Infill provides grip, slide comfort, stability and energy restoration. There are various types of infill, including SBR, EPDM, Thermoplastic Elastomer (TPE) and Thermoplastic Polyolefin (TPO).

Edel Grass endorses the development in the field of rubber infill (report on this subject). Our policy is aimed at sustainability, the future and the supply of environmentally-friendly products. Our large product range means that as a customer you are able to select a product that best matches your requirements. Detailed research reports are available for all of our products. Together with our customers we also want to examine the possibilities of reusing artificial grass systems in the future. We will provide you with the necessary advice but ultimately leave the final decision up to you. For more information about this, please contact us via info@edelgrass.com.

SBR (recycled rubber)

SBR has been made of “end-of-life” vehicle tyres. SBR is available in black and various colours (coated SBR)

Advantages:

  • Excellent playing characteristics;
  • Extended lifespan;
  • Available in black and various colours (coatings)
  • Price

Disadvantages:

  • Relatively high suphur content which can have an effect on the UV stability of the fibres (compared to other infill materials). Edel Grass has specifically opted for TenCate fibres in order to minimise these risks
  • It is possible for zinc to leach out of SBR which can have a negative impact on the environment
  • Because of its black colour SBR has high surface temperatures caused by sunlight
  • Gives off odors at high temperatures
  • Cannot be recycled, only re-used

EPDM (Ethyleen Propylene Dieen Monomeer)

EPDM infill compound is a chemical cross-linked polymer with rubber-type characteristics. The cross-linking takes place using sulphur (Edel Grass does not recommend any peroxide cross-linked infill systems). The granule size of EPDM varies and is similar to SBR granules. EPDM is available in a range of colours.

Advantages:

  • Suitable playing characteristics
  • Available in a range of colours
  • Edel Grass only recommends EPDM based on suphur cross-linked systems
  • Inspected quality
  • No heavy metals
  • Mechanical characteristics can be matched to needs

Disadvantages:

  • Price
  • Peroxide cross-linked systems are not recommended. Post reaction of the material can cause “welding” to occur
  • Over time EPDM can harden because the cross-linking reaction continues. This has a negative impact on playing characteristics and can affect the fibre characteristics
  • Recycling is not possible

TPE (Thermoplastic Elastomer)

TPE is a fairly new type of infill. The material is chopped or compressed into the shape of pellets and is available  in a range of colours.

Advantages:

  • Excellent recycling characteristics
  • No heavy metals
  • Mechanical characteristics can be matched to needs
  • Inspected quality

Disadvantages:

  • Price

Sub-base

In addition to the surface layer (fibre, backing and infill), the sub-base is also an essential part of the synthetic turf system. The sub-base ensures that the system remains stable and even, and is also responsible for some of its excellent playing properties. Edel Grass and its partners use two types of sub-base:

  • A traditional sub-base in which lava and rubber are key components. The rubber provides a number of important playing proporties.
  • Sports Layer system: This is a cleaner sub-base because no rubber is used. This sub-based derives its playing properties from the dimensionally stable Sports Layer, which may or may not be supplied with a TPE infill.

Traditional Sub-base:

A frost-free, firm underlay (50 cm or more) in combination with a artificial turf top layer. In this system, filled with sand and SBR, the playing characteristics are derived almost entirely from the artificial turf top layer.

Engineered sub-base:

Frost-free, firm underlay with a recyclable Sports Layer on top. On top of this construction, we lay a artificial turf top layer, filled
with sand and thermoplastic infill (TPE). The playing characteristics are derived from the combination of the artificial turf and the sport layer.