Binderless panel made from wood particles and cellulosic fibers
OwnerChristine M. Lee, John F. Huntinventors
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Abstract
The present invention relates to pressed fiberboard articles made using a binderless wet process from a combination of fibers and particles. A mixture of particles (e.g., wood particles) and cellulosic fibers is formed into a panel using only water, heat and pressure. The present invention is further directed to fiberboard articles having uniform density cores or higher density cores.
Claims20
A method of forming a pressed article, comprising:
- i) combining particles with cellulosic fibers in an aqueous medium to form a particle-fiber/water mixture;
- ii) distributing said mixture in a form, wherein said form is configured for removal of water from said mixture;
- iii) removing water from said mixture to produce an article having a surface and a core;
- iv) pressing said article at an initial pressure, under conditions wherein a fiber matrix is dewatered on a surface of said article;
- and
- v) pressing said article at a final pressure under conditions wherein a fiber matrix in said core of said article is cured.
A composition comprising a binderless panel comprising wood particles and cellulosic fibers, wherein said panel is at least 0.125 inches to 1.0 inch thick or greater, and wherein said panel has uniform density through the thickness of the panel.
A composition comprising a binderless panel comprising wood particles and cellulosic fibers, wherein said panel is at least 0.125 inches thick, and wherein said panel has core portion disposed between a first outer portion and a second outer portion, wherein said core portion has higher density than said first outer portion and said second outer portion.
Dependencies are inferred from the claim text.