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Hybrid grass or reinforced natural grass is a product created by combining natural grass with synthetic reinforcing fibres. It is used for stadium pitches〔(National Stadium at Singapore Sports Hub unveils state-of-the-art hybrid grass pitch - 938LIVE on xinmsn Entertainment )〕 and training pitches, used for association football,〔(World-Class Hybrid Grass for the World Cup: Video - Bloomberg )〕 rugby,〔(BBC Sport - Murrayfield pitch to be replaced with hybrid grass )〕 American football and baseball. Reinforced natural grass can also be used for events and concerts. The synthetic fibres incorporated into the rootzone make the grass stronger and more resistant to damage. A first generation of hybrid grass appeared in the 1990s. Grass roots were allowed to interwine with a mix of sand and synthetic fibres as they grew.〔 Two main methods exist to insert synthetic fibres in the root zone. The first is to inject fibres in the sand with a tufting machine. This is the method used to create Desso Grassmaster.〔(Desso GrassMaster technology )〕 The second method is to mix fibres and sand in an automated plant and to install it afterwards on the pitch: this process is known as Fibresand. These original types of hybrid grass were harder than natural grass, creating concerns about the risk of injuries for players and maintenance for groundsmen. A recently developed process combines three elements: sand, which is the main component of the rootzone; synthetic fibres, to reinforce the pitch; and an additional element to enable softness. Two patented technologies of this type are (AirFibr ), a technology developed by Natural Grass, which uses natural cork as the softness element,〔(【引用サイトリンク】url=http://patentscope.wipo.int/search/en/detail.jsf?docId=US77336038&recNum=1&maxRec=9&office=&prevFilter=&sortOption=Pub+Date+Desc&queryString=FP%3A%28edmond+pierre+picard%29&tab=PCTDescription )〕〔(Description of the AirFibr Technology ), ESTAC.fr, August 8th 2013〕 and Fibrelastic, developed by Mansfield Sand, which uses elastane fibres as the softness element.〔(【引用サイトリンク】url=http://patentscope.wipo.int/search/en/detail.jsf?docId=EP11124062&recNum=2&office=&queryString=fibresand&prevFilter=&sortOption=Pub+Date+Desc&maxRec=28 )〕〔(Fibrelastic technology )〕 == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「hybrid grass」の詳細全文を読む スポンサード リンク
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