Composite materials, articles of manufacture produced therefrom, and methods for their manufacture
View Patent ↗The invention is directed to a plastic fiber article of manufacture having composite-like high strength characteristics. The article of manufacture can be in the form of a panel or board. The panel or board is constructed from low cost fiber materials, industrial grade or high thermal plastic, and other additives to protect the board or panel from ultraviolet light, fugi growth, excessive heat, fire, insect infestation, and/or weathering. The plastic fiber panel or board may be textured and colored to resemble natural wood such as cedar, walnut, or oak. The plastic fiber panel or board is stronger more durable and may be cheaper than natural wood alternative panels or boards.
1. A building material article of manufacture, comprising: a fiber material and a thermal plastic material,
the fiber material comprising about 35% by weight of fiberglass and about 25% by weight of wood, and
the thermal plastic material comprising about 40% by weight of plastic and having a MFI (Melt Flow Index) of about 8 to about 15,
wherein the article is formed by mixing and extruding the fiber and thermal plastic materials at predetermined temperatures and cutting the extrusion to desired lengths.
2. The article of manufacture according to claim 1 wherein the wood is of a size which fits through a 20 to 50 mesh screen and weighs about 13 to about 15 pounds per cubic foot.
3. The article of manufacture according to claim 2 wherein the wood fits through a 40 mesh screen.
4. The article of manufacture according to claim 1 wherein the thermal plastic material is polyethylene or polypropylene.
5. The article of manufacture according to claim 4 wherein the thermal plastic is polypropylene.
6. The article of manufacture according to claim 1 further comprising at least one enhancer selected from the group consisting of stearic acid, benzl peroxide, dichloro-s-triazine, isocyanates, and maleic anhydride in an amount of about 3% by weight.
7. The article of manufacture according to claim 6 wherein the enhancer is maleic anhydride.
8. The article of manufacture according to claim 1 further comprising at least one additive selected from the group consisting of dyes, ultraviolet protecting additives, flame retardants, fungus retardants, heat resistant antioxidants, and insect retarding additives.
9. The article of manufacture according to claim 8 further comprising at least one of the following additives:
about 0.02% to about 2% of dye coloring;
about 0.02% to about 1% of fire retardation additive;
about 0.12% to about 1% ultraviolet protection additive;
about 0.12% to about 1% of insect resistance additives; and
about 0.5% heat resistant antioxidants.
10. The article of manufacture according to claim 1 further comprising a film or veil on a surface of the article of manufacture providing additional durability or UV resistance to the surface of the article of manufacture.
11. The article of manufacture according to claim 10 wherein the film or veil is made from a material selected from the group consisting of polypropylene, polyethylene, and polyester.
12. The article of manufacture according to claim 1 wherein the article of manufacture is a building board or building panel.
13. The article of manufacture according to claim 1 wherein the article of manufacture has a flex modulus of about 1.2 to about 1.3 Million.
14. The article of manufacture according to claim 1 wherein the fiberglass is in the form of chop and is about ¼ inch to about 1 inch in length.
15. The article of manufacture according to claim 1 wherein the article of manufacture has a flex modulus up to about 2.0 Million.
16. The article of manufacture according to claim 1 wherein the thermal plastic material is polyethylene.
17. The article of manufacture according to claim 1 wherein the thermal plastic material comprises polyethylene and polypropylene.
18. The article of manufacture according to claim 6 wherein the enhancer is in an amount up to about 5% by weight.
19. The article of manufacture according to claim 1 further comprising a capstock co-extrusion.
20. The article of manufacture according to claim 1 , wherein the article of manufacture has a flex modulus of about 1.6 million to 1.7 million.
21. The article of manufacture according to claim 1 wherein the article of manufacture has a flex modulus of up to about 2.0 Million.
22. The article of manufacture according to claim 1 wherein the articles comprises solid portion defining a plurality of cross-sectional voids.
23. The article of manufacture according to claim 22 wherein the voids are of differing circumferential sizes.
24. The article of manufacture according to claim 12 wherein the article is extruded with a rectangular cross section and a plurality of voids having a diagonal orientation with respect to the cross section.