Patent Number: 6,251,979

Title: Strengthened, light weight wallboard and method and apparatus for making the same

Abstract: A novel wallboard composition is disclosed comprising a unique combination of synthetic binders selected for their ability to establish a strengthened permanent bond in the final dry state in combination with an expanded mineral such as Perlite which largely reduces the amount of gypsum over current gypsum wallboard formulations, thus reducing the weight while maintaining the strength of the wallboard structure. In a preferred embodiment, the lightweight, strengthened wallboard of the present invention also comprises a covering veneer that is applied to the top ply of the face paper to provide increased strength, moisture resistance, and fire retardency, and the back paper top ply is treated to provide increased flexural strength. Additionally, this invention relates to the unique manufacturing process to produce the wallboard composition of the present invention in order to create a lightweight, strengthened, moisture resistant, and fire retardant wallboard used to cover walls and ceilings in construction applications. Still further, this invention relates to the apparatus for manufacturing the wallboard composition of the present invention, including a method and apparatus for economically converting a standard gypsum wallboard manufacturing facility into a facility for manufacturing wallboard of the present invention.

Inventors: Luongo; Joseph S. (Kingman, AZ)

Assignee: Advanced Construction Materials Corp.

International Classification: B29C 67/24 (20060101); B32B 29/00 (20060101); C04B 26/00 (20060101); C04B 28/00 (20060101); C04B 26/02 (20060101); C04B 28/14 (20060101); C08K 3/00 (20060101); C08L 75/04 (20060101); C08K 3/30 (20060101); C08K 7/00 (20060101); C08K 7/22 (20060101); C08L 75/00 (20060101); C08K 003/00 ()

Expiration Date: 06/26/2018