Method for producing a cementitious board, apparatus for producing a cementitious board, and cementitious board

Patent metadata

Field	Value
Publication number	US-11911928-B2
Application number	US-201917781760-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	Dec 16, 2019
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Method for producing a cementitious board ( 1 ), wherein
a first liner ( 2 ) with first overlap sections ( 5 ) is provided and furnished with at least one layer of at least one slurry comprising a cementitious material ( 3 ); a second liner ( 4 ) with second overlap sections ( 8 ) is provided and arranged such that it contacts the first overlap sections ( 5 ) of the first liner ( 2 ), wherein the at least one layer of the at least one slurry ( 3 ) is arranged between the first liner ( 2 ) and the second liner ( 4 ); an adhesive foam ( 6 ) is provided at least partly on at least one of the first or second overlap sections ( 5, 8 ); and the first liner ( 2 ) and the second liner ( 4 ) are bonded via the adhesive foam ( 6 ) in the overlap sections ( 5, 8 ).

First claim

The invention claimed is:

1. Method for producing a cementitious board, wherein
a first liner with first overlap sections is provided and furnished with at least one layer of at least one slurry comprising a cementitious material;
a second liner with second overlap sections is provided and arranged such that it contacts the first overlap sections of the first liner, wherein the at least one layer of the at least one slurry is arranged between the first liner and the second liner;
an adhesive foam is provided at least partly on at least one of the first or second overlap sections; and
the first liner and the second liner are bonded via the adhesive foam in the overlap sections.

2. Method according to claim 1 , wherein the adhesive foam is provided at the overlap sections in a width which corresponds to more than 50% of the width of this overlap sections.

3. Method according to claim 1 , wherein the adhesive foam is provided on two separate overlap sections.

4. Method according to claim 1 , further comprising a step of generating the adhesive foam by reducing the density of an adhesive by a factor of 2 to 15 by foaming it.

5. Method according to claim 1 , wherein the adhesive foam is provided in a density in the range of 50 g/l and 800 g/l.

6. Method according to claim 1 , wherein the adhesive foam is provided at the overlap sections in an amount of 5 g/m or less.

7. Method according to claim 1 , wherein the adhesive foam is provided in the overlap sections as discrete elements.

8. Method according to claim 1 , wherein the adhesive foam is provided in the overlap sections in a width of 20 mm to 30 mm.

9. Method according to claim 1 , further comprising the step of distributing the adhesive foam in the overlap section.

10. Method according to claim 9 , wherein the step of distributing the adhesive foam is carried out by means of a roller.

11. Method according to claim 1 , further comprising a step of generating the adhesive foam by reducing the density of an adhesive by a factor of 5 to 10, by foaming it.

12. Method according to claim 1 , wherein the adhesive foam is provided at the overlap sections in an amount of 2 g/m or less.

13. Method according to claim 1 , wherein the discrete elements are selected from the group consisting of spots, stripes, a zig-zag pattern, a grid pattern and a cross-shaped pattern.

Assignees

• Knauf Gips Kg

Inventors

• Karakoussis Stergios
• Hartmann Alexander
• Paraskov Georgi
• Knauf Carlo
• Peter Anton

Classifications

• C04B41/009

  characterised by the material treated · CPC title

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title

• B32B37/0046

  characterised by constructional aspects of the apparatus · CPC title

• B32B2255/26

  Polymeric coating · CPC title

• C04B41/4503

  having an adhesive layer · CPC title