Patent ID: 6773639
Filing Date: 2004-08-10
Classification: B29C,B29K,B29L,C04B,E06B,Y10T

Abstract:
A method of forming fire door components of resin bonded vermiculate and hydraulic binder, comprising the steps of:a) depositing into a mold a mixture of exfoliated vermiculite, a resin and a hydraulic binder, the mold being maintained at a temperature less than the reaction temperature of the resin; b) transferring the mold and thereby the mixture to a heated press; c) applying to the mixture through the press a predetermined pressure at a predetermined temperature for a predetermined period sufficient to harden the mixture into a fire door core having a density from about 350 kg/m3 to about 600 kg/m3; and d) removing the hardened fire door core from the mold.