Method for forming a fire resistant cellulose product, and associated apparatus

A method of forming a fire resistant cellulose paperboard product, said method comprising:

• forming a cellulose fiber mixture, wherein the cellulose fiber mixture consists of fibers, an aqueous fire-retarding solution, and a bonding agent, wherein the fibers in the cellulose fiber mixture consist of refined cellulose fibers, wherein the fire-retarding solution and the bonding agent are substantially uniformly distributed with respect to the refined cellulose fibers in the cellulose fiber mixture, and wherein the aqueous fire-retarding solution comprises one of a boron compound, a borate, a bromine compound, aluminum hydroxide, magnesium hydroxide, hydromagnesite, antimony trioxide, a phosphonium salt, ammonium phosphate, diammonium phosphate, and combinations thereof;
• exposing the cellulose fiber mixture to an actuating element, the actuating element being configured to actuate the bonding agent so as to facilitate cohesion of the refined cellulose fibers having the fire-retarding solution distributed therein and to form the cellulose fiber mixture into a cellulose fiber board member, the cellulose fiber board member having opposing major surfaces;
• and
• engaging a cellulose sheet member with each of the major surfaces of the cellulose fiber board member, such that each cellulose sheet member substantially covers the respective major surface.