| 摘要 |
PURPOSE:To obtain a laver draining screen economically producible because of uselessness of weaving or knitting process with leveling string, having no damage of string, showing a long useful life by partially fusing sides of plural draining screen rods unsolidified extruded in parallel side by side. CONSTITUTION:The objective laver draining screen comprises draining screen rods obtained by extrusion molding a thermoplastic resin in a cylindrical state arranged side by side and simultaneously in a plane state, partially fusing mutual sides of adjoining rods, cooling and cutting in lengths. This laver draining screen is preferably obtained by partially fusing plural draining screen rods molded by an extruder 1 by a fusing device 2, cooling the rods in a cooling bath 3, then subjecting to adhesion imparting treatment by a surface treating device 4 and cutting by a cutter 6. |
