| abstract |
(57) [Problem] To provide a manufacturing method capable of forming a thick colored film without requiring a complicated process, hardly pulverizing, and inexpensively obtaining colored silica sand that is hard to abrade an artificial turf pile. SOLUTION: At least 100 parts by weight of silica sand having a particle size of 0.5 to 1.5 mm is gelled in at least 120 seconds from a liquid state, and is a one-part or two-part polyurethane resin cured through this process at least 5 to 60 parts by weight. Part and a film-forming material containing a pigment are added and agitated and mixed, and after the gelation of the polyurethane resin starts and the rubber chips begin to aggregate, the agitation and mixing are continued to release the aggregation of the silica sand. Have. |