EPDM гранул

Type specification about PU cementAdopting the modern polyurethane synthetic materials , the PU cement has a extensive use as artificially synthesized finishing coat . It has a very good durable index , and is the composite material with dynamic character for the designs of the sports fields .Afeter 40 years usage and improvement , now it has developed into multi-kinds of tracks which adopt the polyure- thane as the main material .Pure PU cement surface layer The rational inclination design and the leveling demands stipulated by the construction to the watertight polyurethane composite layer ensure good drainage performance with no water accumulation in raining condition. The product can drain off water within 30 min. After a heavy storm so as to maintain the normal use of the PU cement surface layer. The PU cement surface layer, mainly made of MDI material and coated with imported skidproof sand layer, features good buffer action to outside forces. Fully meeting elastic requirements for sporting venues, the product can provide athletes with sufficient reacting force for better performance without any injury caused, comparing with other venue materials. Overall valued with good elasticity, all weather, strong adhesion, good extensibility, nail-puncturing resistance, durable, resistant aging , flame retardant, multi-colors, dust proofing, cleanness and asepsis, easy maintenance and management, etc., the product greatly benefits the beautification of the whole environment.1.EPDM granule style Pure PU cement has lots of strong points ,but the cost is pretty high and only developed countries can posses the track made by PU cement at incipient stage . But after development of composite permeable polyure-thane using polyurethane adhesive and EPDM granule , the granule EPDM polyurethane veneer came into emergance .This kind of PU veneer neednot dewatering and can be used at anytime . Compared with PU veneer ,EPDM was cheaper , easy to construct , but the life expectancy may be shorter as the adhesive propertiy might influenced after exposing to strong sunlight and rain ,causing the change in the macromolecule and therefore the EPDM granule might fall off ,and the PU veneer might lost its function after 2-3years usage , althought it can be respray , the bottom layer might fall apart and the loss might outweight the gain .