MANUFACTURING METHOD OF NON-BRIDGE POLYPROPYLENE RESIN FOAMING SHEET AND NON-BRIDGE POLYPROPYLENE RESIN FOAMING SHEET

摘要

PURPOSE: A manufacturing method of a non-bridge poly propylene resin foaming sheet is provided to be able to manufacture a high magnification thin sheet having an excellent product, a good appearance and a fine foaming cell. CONSTITUTION: The manufacturing method of the non-bridge poly propylene resin foaming sheet is manufactured by using an extrusion foaming device which has a gear pump connected by an adaptor and inserted between an extruder and a die. Herein, the inlet pressure of the gear pump controls the extruder to be within the specified range. The method makes the manufacture of the non-bridge poly propylene resin foaming sheet possible, which has an excellent extruding stability.