| 摘要 |
#CMT# #/CMT# A thermal insulation layer (5) is present between the top and bottom layers (3, 13). Undersoil heating (6) is provided between the insulation layer and the upper surface of the top layer. #CMT#USE : #/CMT# The surface is especially useful for clay or gravel courts for playing tennis. #CMT#ADVANTAGE : #/CMT# The top gravel layer is frost-resistant and the surface can be played on throughout the year. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a cut-away perspective view of a tennis court. 1 : Tennis court 3 : Top gravel layer 4 : Intermediate pumice layer 5 : Insulation cloth 6 : Heating pipe 11 : Hot water source 13 : Sand layer 15 : Soil 16 : Perforated metal-containing synthetic film #CMT#POLYMERS : #/CMT# The insulation layer comprises a first layer of one or more materials chosen from synthetic or natural rubbers and polymers, including (block) (co)polymers such as polyolefins, polyethers, polyesters and/or polycarbonates, preferably polyethersulfone. |
