At present, the mainstream artificial turf system includes grass silk, rubber grain filling layer, quartz sand filling layer, base cloth, backing glue and foundation. The grass, base cloth and backing are from artificial turf manufacturers; rubber particles, Quartz sand is purchased by the user or the engineering contractor; the foundation is constructed by the user or the engineering contractor, usually cement or gravel, and there is almost no environmental problem.
The main environmental protection requirements for straw are heavy metals such as antimony, arsenic, antimony, cadmium, chromium, lead, mercury and selenium which cannot exceed the amount specified in the relevant standards. The environmentally friendly grasses use new high-quality olefin polymers and are resistant to heavy metals. High-temperature color masterbatch and processing aids are extruded and formed at one time. Due to the single raw materials, the quality can be well controlled. It will not cause irritation to the skin during use and will not cause harm to the environment. The grass is required to pass the SGS food grade test, and through the 19 heavy metal tests of European children's toys, does not contain any heavy metals.
Most of the non-environmental factors of grasses are derived from the use of recycled materials that are unknown or unqualified, because the sources of recycled materials are generally complex and contain many different additives. These additives are easy to use after multiple processing. Reacts or cleaves, causing damage to the human body and the environment. In addition, due to the different uses of the recycled materials, it is inevitable that heavy metals will be introduced during the recycling, and will remain in the grass after being processed into grasses, causing potential poisoning damage to long-term contacts and causing water and soil environment. An irreversible hazard.
At present, there are only a handful of artificial turf fabric manufacturers with large scales, all of which have relevant qualification certificates. The quality and environmental protection are relatively reliable, and basically there will be no environmental problems.
At present, the backing glue used for artificial turf is mainly styrene-butadiene latex, and the styrene-butadiene latex is prepared by polymerization of butadiene and styrene. The environmentally friendly styrene-butadiene latex is not only qualified, but also the reaction process is carried out in a precisely controlled reactor. Make it meet national standards. However, this set of processes and equipment is very expensive, not all manufacturers can achieve, only a few large manufacturers can achieve this requirement, so the price of latex of each manufacturer is not the same, the quality is also uneven.
The significance of rubber granules filling artificial turf is that the artificial turf has natural turf-like elasticity, rolling performance and good interaction between human grass and ball grass. It is an important component of artificial turf system and also a part of the system that directly contacts people. The environmentally-friendly rubber granules are made by mixing and granulating styrene-butadiene rubber with color masterbatch and auxiliaries. The production process strictly controls the process to ensure the elasticity of the rubber particles, and does not contain heavy metals or odor. The rubber particles are made by heating and pulverizing the raw materials. Such rubber particles are not only environmentally friendly and non-toxic, but also better protect the grass line, reduce the abrasion of the grass line and prolong the service life of the lawn. However, the rubber pellets produced by this method are relatively expensive and are used only in a few sites. Most of the sites use rubber granules made from waste rubber products such as waste tires, soles, wires and cables. Due to the complex composition of such rubbers, different additives may form reactions or decomposition during processing or use to produce toxic and harmful substances. The substance is harmful to the user and the environment.
