MULTILAYER RESIN-COATED SAND

摘要

PROBLEM TO BE SOLVED: To provide a filler for artificial turf that has a production process affording a lower cost with a reduced amount of waste and has a resin giving a uniform coating with excellent wear resistance, good tactile properties and aesthetic appearance.SOLUTION: A multilayer coated particulate material is produced through a step of blending two or more polymers having a melting point temperature difference of 5°C or higher and selected from a propylene-based homopolymer and a propylene-based copolymer to produce a polymer blend and mixing the polymer blend with a particulate substrate heated to not less than a melting point of the polymer blend to form a mixture; a step of injecting water and/or air into the heated mixture to cool the mixture; and a step of separating a coated particulate material after cooling.