BASE PLATE FOR PACHINKO MACHINE AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a base plate for a Pachinko machine which is excellent in dimensional stability and nail pulling out strength. SOLUTION: In the base plate for the Pachinko machine, the outer layer consisting of an unfoamed styrene resin sheet or a foamed styrene sheet (the content of a rubbery polymer is less than 15 wt.%) having an expansion ratio of less than 1.5 is stuck on one side or both sides of a core layer consisting of a foamed styrene resin (the content of the rubber polymer is less than 15 wt.%) having the expansion ratio of 1.5 or more. In a method for manufacturing the base plate for the Pachinko machine, the (foamed) styrene resins, which form the core layer and the outer layer, are coextrusion-molded using a multilayer extruder. COPYRIGHT: (C)2005,JPO&NCIPI