Cellulosic article having increased thickness
View Patent ↗A method of preparing a cellulosic article includes a step of combining cellulosic material and binder resin to form treated cellulosic material. A mat is formed of a plurality of layers of the treated cellulosic material. The method also includes the steps of interfering with bonding of resin between two adjacent layers of the mat, and applying heat and pressure to the mat to form a cellulosic composite article having an internal blistered pattern. A consolidated cellulosic article includes a consolidated cellulosic mat and a layer of blisters disposed in the consolidated cellulosic mat.
1. A consolidated cellulosic article having a thickness, comprising:
a consolidated cellulosic mat comprising first and second layers adjacent one another, the first and second layers each comprising a cellulosic material and a binder resin; and
a layer of blisters disposed in the consolidated cellulosic mat between the first and second layers which interferes with bonding between the first and second layers and contributes to increasing the thickness of the consolidated cellulosic article, the blisters formed at pre-cured surface areas of the binder resin on the first layer.
2. The consolidated cellulosic article of claim 1 , wherein the mat further comprises a third layer adjacent the second layer, and a fourth layer adjacent the third layer, and wherein the article further comprises a second layer of blisters disposed between the second and third layers, and a third layer of blisters disposed between the third and fourth layers.
3. The consolidated cellulosic article of claim 1 , wherein said mat has a thickness in a range of 3 inches to 12 inches.
4. The consolidated cellulosic article of claim 1 , wherein the first and second layers each have a thickness in a range of 0.032 inch to 0.125 inch.
5. The consolidated cellulosic article of claim 1 , wherein the article has a specific gravity of between about 0.4 and about 0.6.
6. The consolidated cellulosic article of claim 1 , wherein the blisters comprise hollow spaces, and wherein the hollow spaces contain routing wires.
7. The consolidated cellulosic article of claim 1 , wherein the blisters comprise hollow spaces, and wherein the hollow spaces contain cables.
8. The consolidated cellulosic article of claim 1 , wherein blisters increase the thickness of the cellulosic article by 50 percent relative to the mat without the layer of blisters.
9. A consolidated cellulosic article having a thickness, comprising:
a consolidated cellulosic mat comprising first and second layers adjacent one another, the first and second layers each comprising a cellulosic material and a binder resin; and
a layer of blisters disposed in the consolidated cellulosic mat between the first and second layers which interferes with bonding between the first and second layers and contributes to increasing the thickness of the consolidated cellulosic article, the blisters formed at charred surface areas of the cellulosic material and the binder resin on the first layer.
10. The consolidated cellulosic article of claim 9 , wherein the mat further comprises a third layer adjacent the second layer, and a fourth layer adjacent the third layer, and wherein the article further comprises a second layer of blisters disposed between the second and third layers, and a third layer of blisters disposed between the third and fourth layers.
11. The consolidated cellulosic article of claim 9 , wherein said mat has a thickness in a range of 3 inches to 12 inches.
12. The consolidated cellulosic article of claim 9 , wherein the first and second layers each have a thickness in a range of 0.032 inch to 0.125 inch.
13. The consolidated cellulosic article of claim 9 , wherein the article has a specific gravity of between about 0.4 and about 0.6.
14. The consolidated cellulosic article of claim 9 , wherein the blisters comprise hollow spaces, and wherein the hollow spaces contain routing wires.
15. The consolidated cellulosic article of claim 9 , wherein the blisters comprise hollow spaces, and wherein the hollow spaces contain cables.
16. The consolidated cellulosic article of claim 9 , wherein blisters increase the thickness of the cellulosic article by 50 percent relative to the mat without the layer of blisters.