20130340961 | Method of manufacturing paper based honeycomb core wallboard panel - The instant invention is directed to a boric and boron based fire resistant wall board panel and method of manufacture. The wall board panels are formed from a pair of sheet members which are parallel in alignment and a honeycomb core sandwiched between the sheet members. The inner surfaces of the sheet members are coated with an adhesive material and the honeycomb core is impressed into the adhesive layers. | 12-26-2013 |