Composite wood replacement article
View Patent ↗A composite article includes a matrix having first and second opposing surfaces defining a transverse dimension and a filler material embedded in the matrix. The filler material presents a density gradient in the transverse dimension wherein a minimum filler density is at the first surface. In one embodiment, the composite article is a non-laminated article defining first and second regions wherein the first region encompasses the first surface. The first region has a filler-to-matrix ratio that varies along the transverse dimension, the filler-to-matrix ratio being at a minimum at the first surface. The first region can include one or more additives. A method for forming a composite article includes injecting first and second compositions into a die head at different points so as to produce a partially mixed composition that is discharged from the die head. The second composition contains less filler material than the first composition.
1. A non-laminated composite article comprising:
a matrix having first and second opposing surfaces defining a transverse dimension and defining first and second regions juxtaposed along said transverse dimension, said first region encompassing said first surface; and
a filler material embedded in said matrix, said filler material presenting a density gradient in said transverse dimension wherein filler density changes gradually along said transverse dimension in said first region with a minimum filler density at said first surface.
2. The non-laminated composite article of claim 1 wherein said transverse dimension is the thickness of said composite article.
3. The non-laminated composite article of claim 1 wherein said second region is substantially larger than said first region and encompasses said second surface.
4. The non-laminated composite article of claim 1 wherein said first region includes an additive.
5. A non-laminated composite article having first and second opposing surfaces defining a transverse dimension, said non-laminated composite article comprising a matrix and a filler material embedded in said matrix and defining first and second regions juxtaposed along said transverse dimension wherein said first region encompasses said first surface, and wherein said first region has a filler-to-matrix ratio that varies along said transverse dimension, said filler-to-matrix ratio being at a minimum at said first surface.
6. The non-laminated composite article of claim 5 wherein said transverse dimension is the thickness of said non-laminated composite article.
7. The non-laminated composite article of claim 5 wherein said first region has a lower filler content than said second region.
8. The non-laminated composite article of claim 5 wherein said second region is substantially larger than said first region and encompasses said second surface.
9. The non-laminated composite article of claim 5 wherein said first region includes an additive.
10. The non-laminated composite article of claim 5 wherein said non-laminated composite article further defines a third region juxtaposed with said second region along said transverse dimension, said third region encompassing said second surface, and wherein said third region has a filler-to-matrix ratio that varies along said transverse dimension, said filler-to-matrix ratio of said third region being at a minimum at said second surface.
11. The non-laminated composite article of claim 10 wherein said first and third regions have a lower filler content than said second region.
12. The non-laminated composite article of claim 10 wherein said second region is substantially larger than said first and third regions.
13. The non-laminated composite article of claim 10 wherein said first and third regions include an additive.