MOLDING METHOD OF FRP MOLDED PRODUCT, FRP PRODUCT, FRP PRODUCT FOR WATERWAY, RIVER, LAKE AND MARSH AND SEASHORE INCLUDING STOP LOG OR ITS PART MADE OF FRP, FOOTPATH BRIDGE MADE OF FRP OR ITS PART MADE OF FRP AND FOOTBOARD MADE OF FRP OF CONTROL BRIDGE OR FOOTPATH BRIDGE

摘要

PROBLEM TO BE SOLVED: To achieve the enhancement of the strength of an FRP molded product and the shortening of a molding time by raising molding pressure and a molding temperature and accelerating a molding speed in a hand lay-up method. SOLUTION: A mold is prepared (S1-S4) to execute the process of the hand lay-up method. A glass cloth is laid within the mold (S5) to cast an unsaturated polyester resin, a curing agent and a curing accelerator in the mold and the cast composition is leveled using a coating roll by a worker (S6). A glass mat is laid on the formed laminate (S7) to cast the unsaturated polyester resin and the curing accelerator on the glass mat and the surface leveling lamination using the coating roll by the worker is performed for about 5 min (S8) and repeated until the laminate becomes a predetermined thickness to be completed after about 1 hr. A pressing machine equipped with a heater is placed on the laminate to press the laminate under a pressure of about 0.7 kgf/cm2by the pressing machine while heating the same at about 140°C (S9). The air in the laminate is expeled to bring the laminate to a dense structure and the dense laminate is heated at a high temperature to obtain the FRP molded product having high strength. COPYRIGHT: (C)2006,JPO&NCIPI