Patent ID: 6776865
Filing Date: 2004-08-17
Classification: B29C,B29L,B32B,Y10T

Abstract:
A method of forming a honeycomb sandwich composite panel by a resin transfer molding process consisting of:stacking a thermosetting sealing material on at least one side of a honeycomb core, said thermosetting sealing material having an adhesive property and consisting of resin film and glass microspheres; stacking a dry fabric on said thermosetting sealing material; hardening said sealing material by heating said sealing material and said dry fabric up to the curing temperature of said sealing material at a rate of 1Â° C. per minute or less and maintaining this temperature for a specified curing time period of said sealing material; impregnating said dry fabric with a thermosetting resin while varying the temperature of said sealing material and said dry fabric to a resin impregnating temperature and maintaining this temperature for a specified period of time; and hardening the resin impregnated into said dry fabric by heating said sealing material and said dry fabric to the curing temperature of said thermosetting resin and hot-pressing them for a specified period of time.