Claims
- 1. A method for forming a body fluid absorbent board having structural integrity and low density comprising:
- separating peat moss into a fraction of a size at least sufficient to remain on a screen of about 100 mesh and peat fines and discarding the peat fines;
- forming a slurry of said peat moss fraction in combination with mechanical woodpulp fines having a Canadian Standard Freeness of from 60 to 500; and
- forming a board from said slurry, the board having a dry density of from about 0.03 to about 0.09 gm/cc.
- 2. The method of claim 1 wherein the peat moss is separated into a fraction of a size at least sufficient to remain on a screen of about 75 mesh.
- 3. The method of claim 1 wherein said peat moss is separated into a fraction of a size at least sufficient to remain on a screen of about 50 mesh.
- 4. The method of claim 1 wherein the slurry has a solids content of from about 0.1 percent to about 1.0.
- 5. The method of claim 1 wherein said board is formed by laying said slurry down on a Fourdrinier wire in a weight of about 15 to about 35 grams per square foot.
- 6. The method of claim 5 wherein the slurry is dewatered by applying a vacuum across the Fourdrinier wire, said vacuum having a pressure differential of about 10 to 15 inches of mercury.
- 7. The method of claim 5 wherein said vacuum is applied to have a residence time of from about 1 to about 5 seconds.
- 8. The method of claim 1 wherein said low density board is rendered flexible by dry compressing.
- 9. The method of claim 8 wherein said dry compression comprises embossing.
- 10. The method of claim 8 wherein said dry compressing comprises increasing the density of the board to about 0.2 to about 0.8 gm/cc.
- 11. The method of claim 1 wherein the board is rendered flexible by slitting.
- 12. A body fluid absorbent board comprising:
- a mixture of peat moss having a particle size at least sufficient to remain on a screen of about 75 mesh, and mechanical wood pulp fines having a Canadian Standard Freeness of from 60 to 500; the board having a dry density of from about 0.03 to about 0.09 gm/cc.
- 13. The board of claim 12 wherein the peat moss has a particle size at least sufficient to remain on a screen of about 75 mesh.
- 14. The board of claim 13 wherein said peat moss has a particle size at least sufficient to remain on a screen of about 50 mesh.
- 15. The board of claim 12 wherein said mechanical wood pulp fines has a Canadian Standard Freeness of from about 60 to about 500.
- 16. The board of claim 12 wherein said mechanical wood pulp is present in the quantity of at least 5% by weight of the finished board.
- 17. The board of claim 16 wherein said mechanical wood pulp is present in quantities of about 10 to about 20% by weight of the finished product.
- 18. The board of claim 12 being dry compressed by embossing.
- 19. The board of claim 12 wherein the board is dry compressed to a density of from about 0.2 to about 0.8 gm/cc.
- 20. The board of claim 12 having laminated to at least one surface, a layer of Kraft pulp.
- 21. The board of claim 20 wherein about 0.5 to 5.0 grams of Kraft pulp per foot square is employed.
Parent Case Info
This application is a continuation-in-part of Ser. No. 174,403 filed on Aug. 1, 1980 and now abandoned, which is a continuation-in-part of of Ser. No. 7,280 filed on Jan. 30, 1979 and now issued as U.S. Pat. No. 4,215,692 on Aug. 5, 1980.
US Referenced Citations (10)
Foreign Referenced Citations (1)
Number |
Date |
Country |
463937 |
Mar 1950 |
CAX |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
174403 |
Aug 1980 |
|
Parent |
7280 |
Jan 1979 |
|